JP2016199102A - Slide rail - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a lock member of a slide rail from coming off from a lock groove even the member is bent laterally due to input of major loads.SOLUTION: A slide rail 10 has lock springs 13A that are mounted on an upper rail 12 and enter by being biased lock grooves 11B1 formed in a lower rail 11 so as to lock sliding between both rails 11 and 12. The lock springs 13A have lock pieces 13A2 which extend across from the upper rail 12 toward the lower rail 11 and are configured so that the lock pieces 13A2 move in a direction perpendicular to an extending direction of the pieces to enter the lock grooves 11B1; and also have restricting parts 13A3 which contact the upper rail 12 so as to restrict the lock pieces 13A2 from moving from positions where the pieces enter the lock grooves 11B1 in an extending direction of the lock pieces 13A2.SELECTED DRAWING: Figure 23

Description

  The present invention relates to a slide rail. More specifically, the present invention relates to a slide rail that connects a vehicle seat so as to be slidable with respect to a vehicle body.

  Conventionally, as a slide rail for a vehicle seat, there is known a configuration having a lower rail attached on a floor and an upper rail attached to the vehicle seat so as to be slidable back and forth with respect to the lower rail. (Patent Document 1). As a mechanism for locking the slide between the two rails at normal times, the above-mentioned slide rail has a lock spring extending in a long shape in the slide direction supported by the upper rail, and elastically enters the lock groove of the lower rail from the lower side. A locking mechanism is used.

JP 2012-126183 A

  However, in the above-described conventional technology, when a large load is input between the upper rail and the lower rail in a sliding direction so as to forcibly displace them in the sliding direction, the lock spring is laterally bent by this force. There is a risk of being moved away from the lock groove. The present invention was devised as a solution to the above-described problem, and the problem to be solved by the present invention is that the slide rail lock member does not come out of the lock groove even if it is laterally bent by a large load. There is in doing so.

  In order to solve the above problems, the slide rail of the present invention takes the following means.

  1st invention is a slide rail which connects the sheet | seat for vehicles to the state which can be slid with respect to a vehicle main body. This slide rail is formed on a fixed rail that is attached to the vehicle body, a movable rail that is assembled in a slidable state on the fixed rail, and is attached to the vehicle seat, and is attached to one rail and formed on the other rail. And a lock member that locks the slide between the two rails by being inserted into the lock groove by urging. The lock member is configured such that the lock piece extending from the one rail to the other rail moves in a direction perpendicular to the extending direction of the lock piece and enters the lock groove, and the lock piece is the lock groove. It has a restricting portion that comes into contact with one rail so as to restrict the movement of the lock piece in the extending direction from the position where it enters.

  According to the first aspect of the invention, the movement of the lock piece in the direction extending from the lock groove is restricted by the restricting portion. Therefore, in the locked state of the slide rail, when a large load is input between the rails to forcibly displace them in the sliding direction, even if the lock piece is laterally bent by this force, it will come out of the lock groove. It can be prevented from moving.

  The second invention is the following structure in the first invention described above. A lock member is formed by a lock spring in which a wire rod is bent into a U shape, the lock piece is formed by both U-shaped leg pieces, and the lock piece is inserted into the lock groove by its own elastic restoring deformation. It is configured. One end of the lock spring is attached to the one rail, and the other end of the U-shaped bent portion is bent to form the restricting portion that comes into contact with the one rail so as not to come off.

  According to the second aspect of the present invention, the restricting portion can be easily set on the lock member of the type formed by bending the wire rod.

  The third invention is the following configuration in the second invention described above. The other end of the lock spring that is configured as the restricting portion is folded back straight in the sliding direction.

  According to the third aspect of the invention, the restricting portion can strongly support the lock piece so as not to come out of the lock groove when a large load is input.

It is the perspective view which showed schematic structure of the sheet | seat to which the slide rail of Example 1 was applied. It is a side view of a sheet. It is an expansion perspective view of a slide rail. It is a disassembled perspective view of a slide rail. It is a disassembled perspective view of a locking mechanism. It is the VI-VI sectional view taken on the line of FIG. It is the VII-VII sectional view taken on the line of FIG. It is the VIII-VIII sectional view taken on the line of FIG. It is the perspective view which expressed the lock state of the slide rail in a partly thinned state. It is the perspective view which expressed the cancellation | release state of the slide rail in a partly thinned state. FIG. 7 is a cross-sectional view showing the release state in the same cross-sectional view as FIG. 6. It is a partial expansion perspective view showing the 1st lock pattern of a slide rail. It is the same schematic diagram. It is a partial expansion perspective view showing the 2nd lock pattern of a slide rail. It is the same schematic diagram. It is a partial expansion perspective view showing the 3rd lock pattern of a slide rail. It is the same schematic diagram. It is a partial expansion perspective view showing the state which exists in the slide position which a slide rail does not lock. It is the same schematic diagram. FIG. 20 is a schematic diagram illustrating a state in which the lock spring is suddenly moved in the sliding direction from the state of FIG. 19. It is a schematic diagram showing the height positional relationship of a convex part and a lock groove. It is the XXII-XXII sectional view taken on the line of FIG. FIG. 23 is a cross-sectional view illustrating a state where a large load in the sliding direction is input to the slide rail from FIG. 22. It is the figure which looked at the principal section structure of the slide rail of the other Example in the same cross section as FIG.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing.

  First, the structure of the slide rail 10 of Example 1 is demonstrated using FIGS. As shown in FIG. 1, the slide rail 10 of this embodiment is configured as a connecting device that connects a vehicle seat 1 (vehicle seat) to a state in which the vehicle seat 1 is slid in the front-rear direction with respect to a floor F (vehicle body). ing. The slide rail 10 is provided in a pair of left and right between the seat 1 and the floor F described above, and each of the slide rail 10 is switched between a locked state and a permitted state when the seat 1 is slid in the front-rear direction. It is the structure provided with the lock mechanism 13 which can do. With the above configuration, each slide rail 10 can adjust or fix the position of the seat 1 relative to the floor F in the front-rear direction.

  Here, the above-described seat 1 is configured as a right seat of an automobile, and includes a seat back 2 that serves as a backrest for a seated occupant and a seat cushion 3 that serves as a seating portion. The seat back 2 described above is provided in a state in which the lower end portions of the left and right sides thereof are connected to the rear end portions of the left and right sides of the seat cushion 3. The seat cushion 3 is provided in a state in which a bottom surface portion thereof is connected to the floor F so as to be slidable back and forth via the pair of left and right slide rails 10 described above.

  Each of the slide rails 10 described above is normally held in a state in which their slide operation is locked. Each slide rail 10 is operated by a seated person pulling up a central operation portion 16B1 of a substantially U-shaped slide lever 16B projecting forward from the inside (rail inner space Ar) toward the front lower portion of the seat cushion 3. As a result, the locked state is released all at once, and the seat 1 can be switched to a state in which it can be slid in the front-rear direction. Each slide rail 10 is returned to the slide-locked state by the urging force when the above-described pulling-up operation of the slide lever 16B is released. By such switching, each slide rail 10 can slide the seat 1 in the front-rear direction with respect to the floor F, or can be fixed at each slide position.

  As shown in FIG. 2, the seat 1 described above is in a state of being slightly inclined with respect to the floor F so that the whole is in a front-up position. Specifically, the seat 1 is provided in a posture in which the floor F is inclined in a front-up manner together with the slide rails 10 installed on the floor F because the floor F has a shape that is inclined in a front-up manner. It is said that. With such a configuration, the seat 1 can ensure a wide field of view to the front side even when an occupant with a small physique is seated.

  Hereinafter, a specific configuration of each slide rail 10 described above will be described in detail. In addition, since each slide rail 10 becomes a structure symmetrical with each other, in the following, the structure of the slide rail 10 inside the vehicle shown on the right side in FIG. To do.

  As shown in FIG. 4, the slide rail 10 includes a lower rail 11 attached on the floor F (see FIGS. 1 to 2) and an upper rail 12 attached to the lower part of the seat cushion 3 (see FIGS. 1 to 2). A locking mechanism 13 for locking and releasing the slide between the rails 11 and 12, four resin shoes 14 provided between the lower rail 11 and the upper rail 12, and each resin shoe 14 A plurality of steel balls 15 mounted on each of the upper and lower ends of each of the above and a release mechanism 16 that performs a release operation of the lock mechanism 13. Here, the lower rail 11 described above corresponds to the “fixed side rail” and the “other rail” of the present invention, and the upper rail 12 corresponds to the “movable side rail” and the “one rail” of the present invention.

  The above-described lower rail 11 is formed by bending a sheet of steel sheet that is long in the front-rear direction of the vehicle so that it has a substantially U-shaped cross-sectional shape in the short-side direction. Two portions before and after the portion 11A are provided as bolts on the floor F (see FIGS. 1 to 2) and are integrally fixed. The lower rail 11 is formed by being bent so that the cross-sectional shape thereof is substantially uniform in the longitudinal direction (sliding direction). Specifically, as shown in FIGS. 4 and 7, the lower rail 11 has a bottom surface portion 11 </ b> A provided on the floor F with the surface facing upward, and an upper side from the left and right edges of the bottom surface portion 11 </ b> A. It is formed in a cross-sectional shape having a pair of left and right lower fin portions 11B that are extended and bent back in an inverted U shape on the inward sides.

  Each of the above-described lower fin portions 11B is bent into an inverted U-shape at the front edge portion, and a lock groove 11B1 in a rectangular shape that opens downward along the same edge portion is formed. A plurality of lines are formed at equal intervals in the slide direction. Each of these lock grooves 11B1 has a groove width W of 5 mm in the sliding direction (width of the inner surface of the groove (upper surface)) and 10 mm in the sliding direction, as well shown in FIGS. A plurality of lines are arranged at equal intervals with a space (space D1). Each lock groove 11B1 is formed in a shape in which the groove width W is increased in an inclined manner toward the lower side which is the opening side. Each lock groove 11B1 functions to lock the slide of the upper rail 12 by engaging each lock spring 13A of the lock mechanism 13 attached to the upper rail 12 described later from the lower side. Here, each lock spring 13 </ b> A corresponds to a “lock member” of the present invention.

  Further, on the shelves between the lock grooves 11B1 of the lower fin portions 11B, there are further formed constraining grooves 11B2 having a narrower groove width than the lock grooves 11B1. Each of the restraining grooves 11B2 has a shape in which the groove width is narrower than each lock groove 11B1 and the groove depth is shallow (about half) at the center in the sliding direction on each shelf between the lock grooves 11B1 described above. It is supposed to be in a state formed. Each of the constraining grooves 11B2 is also formed in a shape in which the groove width is increased in an inclined manner toward the lower side that is the opening side of the grooves. Each constraining groove 11B2 functions to lock the slide of the upper rail 12 together with the lock groove 11B1 described above by engaging each lock spring 13A of the lock mechanism 13 described later from below.

  Further, in the center portion of each lower side fin portion 11B in the sliding direction in each lock groove 11B1, an inverted trapezoidal convex portion that protrudes lower than the side wall of each lock groove 11B1 from the bottom surface of each lock groove 11B1. 11B3 is formed. Each of the convex portions 11B3 has a short lateral width (in the sliding direction) that does not hinder the movement of the lock springs 13A described above so as to abut one end or the other end of the locking groove 11B1 in order to lock the slide. (Width length). Specifically, as will be described later with reference to FIGS. 12 to 17, each of the convex portions 11 </ b> B <b> 3 is slide-locked by two of the three lock springs 13 </ b> A coming into contact with one end or the other end in the slide direction in each lock groove 11 </ b> B <b> 1. In this state, the lock pieces 13A2 of the lock springs 13A that are in contact with each other are adjacent to each other with a slight gap in the sliding direction.

  Since each convex portion 11B3 has such a shape, when a large load is input between the upper rail 12 and the lower rail 11 so as to forcibly displace them in the sliding direction, 11B1 is in contact with each lock spring 13A (each lock piece 13A2) that is in contact with one end or the other end in the slide direction in 11B1, and functions to strongly receive the force in the slide direction acting between the rails 11 and 12 It is supposed to be.

  Each said convex part 11B3 is made into the shape by which the corner | angular part of those base sides and front-end | tip sides was rounded off. In addition, each convex portion 11B3 is formed as a flat surface whose top plate surface 11B3a (surface on the bottom side in the drawing) extends straight in the sliding direction. As a result, as shown in FIGS. 18 to 19, even if any of the lock springs 13 </ b> A (the lock pieces 13 </ b> A <b> 2) ride on the top plate surface 11 </ b> B <b> 3 a of each convex portion 11 </ b> B <b> 3 due to the locking operation. The lock spring 13A (the lock piece 13A2) that has come up can be moved to a position where it abuts against one end or the other end of the lock groove 11B1 while smoothly sliding on the top plate surface 11B3a by the sliding movement of the upper rail 12. It is like that.

  As shown in FIG. 21, each protrusion 11B3 described above has a height H1 extending downward from the bottom surface (upper side surface in the drawing) of each lock groove 11B1, and the lock piece 13A2 of each lock spring 13A described above. Lower than the entry position (position on the lower side surface of each lock piece 13A2 in the entry state) when the lock groove 11B1 is in contact with one end or the other end in the slide direction and is in the slide lock state. It is formed in a protruding shape. Further, each of the convex portions 11B3 has a height H2 (each lock piece) when the lock spring 13A (the lock piece 13A2) is on the top plate surface 11B3a. The position of the lower side surface in the figure when 13A2 rides is lower than the height H3 of the side wall of each lock groove 11B1.

  With such a configuration, as shown in FIGS. 18 to 19, any one of the lock springs 13 </ b> A (the lock pieces 13 </ b> A <b> 2) is locked on the top surface 11 </ b> B <b> 3 a of each convex portion 11 </ b> B <b> 3 by the lock operation. 20, even if a large load is applied such that the lock spring 13A (the lock piece 13A2) is suddenly moved in the sliding direction as shown in FIG. 20, the lock spring 13A (the lock piece 13A2) Can be received strongly on the side wall of the lock groove 11B1.

  Further, as shown in FIG. 4, each of the lower side fin portions 11 </ b> B includes a front end side region portion, a rear end side region portion, and a central region portion of each lower side fin portion 11 </ b> B of the lower rail 11 described above. A shoe stopper 11D is formed by being cut and raised inward to restrict the sliding range in the front-rear direction of four resin shoes 14 to be described later, which slides while being applied to the inner side surface. These shoe stoppers 11 </ b> D are configured to abut and lock the sliding movements of the resin shoes 14 in the front-rear direction with respect to the lower rail 11 by their cut and raised shapes.

  Further, rail stoppers (not shown) for restricting the sliding range in the front-rear direction of the upper rail 12 that slides along the shape of the lower rail 11 within a certain range are provided on the outer side surfaces of the lower fin portions 11B. (Omitted) is cut and raised inward. These rail stoppers (not shown) are formed by cutting and raising the front rail side region portion and the rear end region portion of the lower rail 11, respectively. The front side stoppers or rear side stoppers (both not shown) cut and raised on the upper fin portions 12C on both sides come into contact with each other to be locked.

  The upper rail 12 is formed by bending a sheet of steel sheet that is long in the front-rear direction of the vehicle so that it has a substantially hat-shaped cross-sectional shape in the short direction, and its top plate surface portion 12B. Is bolted to a skeleton (not shown) of the seat cushion 3 (see FIGS. 1 and 2) and is integrally fixed. The upper rail 12 is assembled in a state in which the upper rail 12 is slidable in the longitudinal direction with respect to the lower rail 11 by being inserted into the lower rail 11 from the opening end on either side of the longitudinal direction (sliding direction) of the lower rail 11 described above. (See FIG. 3).

  The upper rail 12 is also formed by being bent so that the cross-sectional shape thereof is substantially uniform in the longitudinal direction (sliding direction). Specifically, as shown in FIGS. 4 and 7, the upper rail 12 has a pair of left and right vertical surface portions 12A extending in the height direction through the gap 11C between the left and right lower fin portions 11B of the lower rail 11 described above. And the top plate surface portion 12B extending in the width direction so as to be bridged between the upper end portions of the respective vertical surface portions 12A, and bent back into a U-shape that warps outward from the lower end portions of the respective vertical surface portions 12A. And a pair of left and right upper fin portions 12C.

  The above-described upper rail 12 has left and right upper side fin portions bent back in the U shape with respect to the lower rail 11 and the left and right lower side fin portions bent back in the inverted U shape of the lower rail 11. 11B is inserted and assembled in the longitudinal direction (sliding direction) so as to be hooked into each of 11B (see FIG. 3). By assembling in this way, the upper rail 12 is assembled to the lower rail 11 in such a manner that the left and right upper fin portions 12C are engaged with the lower fin portions 11B of the lower rail 11 and are not peeled upward. (See FIGS. 3 and 7). The above-described upper rail 12 has a state in which a skeleton portion (not shown) of the seat cushion 3 is bolted and fixed integrally on a top plate surface portion 12B that protrudes upward from the central portion in the width direction of the lower rail 11 and is exposed. (See FIGS. 1-2).

  As shown in FIG. 4, at the lower end portions of the vertical surface portions 12A on the left and right sides of the upper rail 12 described above, through grooves 12A1 that allow passage of three lock springs 13A of the lock mechanism 13 described later from the lower side, respectively. It is cut and formed in a shape that opens downward. These through-grooves 12A1 are formed in the central portion of the upper rail 12 in the longitudinal direction (sliding direction) so as to be arranged at equal intervals in the sliding direction, and are respectively a part of the upper side fin portions 12C on the left and right sides of the upper rail 12. It is formed in a shape cut out across the region. Further, each through groove 12A1 is further provided with a lock groove 12A2 extending from each of the vertical rail portions 12A of the upper rail 12 in a slit shape in the height direction, and each edge on the front and rear sides of each through groove 12A1. Formed in the region.

  Each of the lock grooves 12A2 described above is inserted into the front and rear of the frame pieces on the front and rear sides of the left and right lock pieces 13A2 of the three lock springs 13A passed through the through grooves 12A1, respectively. It is formed in a shape having a narrow groove width (substantially the same as the wire diameter of each frame piece) that can be fitted so as not to rattle in the direction. Specifically, as shown in FIG. 8, each lock groove 12A2 has a distance D2 between the front and rear two pieces extending in the height direction from each through groove 12A1, and each lock groove 12A1 is locked to the adjacent through groove 12A1. The gap D3 in the sliding direction between the adjacent groove 12A2 and the groove 12A2 is formed to be 10 mm.

  The groove intervals D2 and D3 are the same as the arrangement intervals between the frame pieces of the corresponding lock pieces 13A2 of the lock springs 13A described later (the lower surface portions on the left and right sides of the release member 16A described later in FIG. 5). The arrangement interval between the slit grooves 16A3 formed in the same is also the same). Thereby, each said lock groove 12A2 is formed in the form which can each penetrate each frame piece of each lock piece 13A2 of the three lock springs 13A mentioned above all at once.

  Further, the bent portions of the upper side fin portions 12C on both the left and right sides of the upper rail 12 described above are in contact with the front and rear rail stoppers (not shown) formed on the lower rail 11 in the front and rear direction of the upper rail 12, respectively. A front stopper and a rear stopper (not shown) that restrict the maximum slide position are formed.

  Next, the four resin shoes 14 provided between the upper rail 12 and the lower rail 11 described above will be described. As shown in FIG. 4, each resin shoe 14 is fitted in a state in which one (upper side) or two (lower side) steel balls 15 can roll at the respective upper and lower ends thereof. It becomes the composition. As shown in FIG. 7, each resin shoe 14 is provided so as to be interposed in the width direction between the left and right upper fin portions 12 </ b> C of the upper rail 12 and the left and right lower fin portions 11 </ b> B of the lower rail 11. Yes.

  Specifically, each resin shoe 14 has an inner corner portion at the base of the left and right lower side fin portions 11B of the lower rail 11, that is, a portion inscribed in a corner portion between the left and right lower side fin portions 11B and the bottom surface portion 11A. The left and right lower fin portions 11B are respectively disposed at locations inscribed in the respective upper and outer corner portions that are bent back inward and downward, and are disposed so as to face the respective installation locations on the lower rails 11. The upper rail 12 is provided so as to be sandwiched between the left and right upper fin portions 12C of the upper rail 12.

  By installing the resin shoes 14 as described above, the steel balls 15 fitted into the upper and lower ends of the resin shoes 14 are connected to the upper and lower outer ends of the upper and lower upper fin portions 12C of the upper rail 12, respectively. The left and right lower fin portions 11B of the lower rail 11 are provided so as to be interposed between the upper and lower outer corner portions of the lower rail 11B. Thus, the upper rail 12 is supported with respect to the lower rail 11 so as to be able to slide smoothly in the front-rear direction without greatly rattling in the height direction or the width direction.

  Next, the configuration of the lock mechanism 13 and the release mechanism 16 shown in FIGS. 3 to 7 will be described. As shown in FIGS. 3 and 7, the lock mechanism 13 and the release mechanism 16 are housed in a rail inner space Ar surrounded by a top plate surface portion 12 </ b> B and both vertical surface portions 12 </ b> A of the upper rail 12. Is provided. As shown in FIGS. 4 to 5, the former lock mechanism 13 includes three lock springs 13 </ b> A wound in a substantially coil shape, a support shaft 13 </ b> B that is inserted into and supported by a winding portion 13 </ b> A <b> 1 of these lock springs 13 </ b> A, and a support. The bracket 13C is attached to the back surface of the top plate surface portion 12B of the upper rail 12 and supports the shaft 13B. The latter release mechanism 16 includes a release member 16A that can collectively operate the lock springs 13A described above in the lock release direction, and a slide lever 16B that pushes down the release member 16A by an operation from the outside of the slide rail 10. It has the composition which has.

  As shown in FIGS. 4 to 5 and FIG. 22, each lock spring 13A constituting the lock mechanism 13 described above is formed such that a single steel wire is wound in a coil shape in some places or extends in a U shape. It is formed by being bent. Specifically, each lock spring 13A includes a coiled portion 13A1 and a pair of left and right bent in a U-shape projecting from the respective end portions on the front and rear sides of the wound portion 13A1 to the left and right sides. And a lock piece 13A2. As shown in FIGS. 4 to 5, these lock springs 13 </ b> A are passed through a support shaft 13 </ b> B whose winding portions 13 </ b> A <b> 1 are inserted from the front side between the vertical surface portions of the bracket 13 </ b> C described above. It is provided as a state supported by the support shaft 13B.

  Each of the lock springs 13A is in a state in which a release member 16A, which will be described later, is applied to the lock pieces 13A2 on the left and right sides of the lock springs 13A2 from above. In order not to stick, it is pressed in a symmetrical shape and held in position. Although the release member 16A will be described in detail later, the release member 16A is assembled to the bracket 13C described above from the upper side and is guided and provided so as to be slidable up and down. The release member 16A is normally held in a state of being lifted upward by the resilient force of the lock pieces 13A2 on the left and right sides of the lock springs 13A, but the slide lever 16B (see FIG. 1) described above is seated. Is pushed from above, and each lock piece 13A2 on both the left and right sides of each lock spring 13A is pushed downward.

  As shown in FIG. 1, the slide lever 16 </ b> B described above is formed of a round pipe material bent into a substantially U shape. The slide lever 16B is formed such that the central portion of the U-shape extends straight in the width direction as an operation portion 16B1 that is gripped by a seated person. Further, the slide lever 16B is bent from the left and right end portions of the operation portion 16B1 to the lower side and extends rearward into the rail inner space Ar of each slide rail 10 from the front side. . The portions inserted into the rail inner space Ar of the slide lever 16B can be rotated to the left and right vertical surface portions 12A of the upper rails 12 by hinge pins 16B2 whose midpoints are oriented in the width direction. The hinge is connected (see FIGS. 3 and 6). An L-shaped push plate 16B3 is integrally attached to each end (rear end) inserted into each rail inner space Ar of the slide lever 16B.

  The pressing plate 16B3 has an L-shaped standing plate portion integrally welded to the rear end portion of the slide lever 16B, and is joined to the top plate, and extends upward from the upper edge portion of the standing plate portion. The portion is set as being covered with the upper surface portion of the release member 16A described above. Specifically, as shown in FIG. 6, the pressing plate 16B3 is always on the front half of the sliding direction on the upper surface of the release member 16A before the slide lever 16B is pulled up. It is set as a state of being superimposed on.

  As shown in FIGS. 10 to 11, the push plate 16 </ b> B <b> 3 rotates so as to be pushed down around the hinge pin 16 </ b> B <b> 2 by an operation in which the operation portion 16 </ b> B <b> 1 of the slide lever 16 </ b> B is pulled up by a seated person. Thereby, the push plate 16B3 presses the upper surface portion of the release member 16A downward by the tip portion of the top plate portion, and pushes the release member 16A downward against the elastic force of each lock spring 13A. To operate. At this time, the release member 16A is guided and provided so as to be movable only in the height direction with respect to the bracket 13C, so that a part of the upper surface thereof is moved downward by rotating the pressing plate 16B3. Even when pressed, the lock springs 13A can be operated so that they are pushed down downward and the lock springs 13A can be pushed down simultaneously. Details will be described later.

  As shown in FIG. 5, the bracket 13 </ b> C is formed by bending a sheet of steel plate that is long in the sliding direction into a reverse hat shape when viewed from the side. As shown in FIGS. 3 to 4, the bracket 13 </ b> C has respective top plate portions that are bent and extended in the front-rear direction from the upper edge portions of the vertical surface portions on the front and rear sides, respectively, below the top plate surface portion 12 </ b> B of the upper rail 12. By being assigned from the side and the fastening bolt 13C1 is inserted and fastened from the lower side, the top plate surface portion 12B of the upper rail 12 is integrally coupled from the lower side. As shown in FIG. 4, a rectangular through hole 16B4 is formed in the top plate portion of the above-described pressing plate 16B3, and the top plate portion and the same top plate portion on the front side of the bracket 13C are formed in the through hole 16B4. Is fastened to the lower surface of the top plate surface portion 12B of the upper rail 12, so that the push plate 16B3 can be rotated in the height direction without interfering with the bracket 13C.

  Specifically, the bracket 13 </ b> C described above is attached to the top plate surface portion 12 </ b> B of the upper rail 12 from the lower side and fastened to the top plate surface portion 12 </ b> B of the upper rail 12, so that the longitudinal direction of the upper rail 12 slides. It is set in a state where it is directed straight in the direction. As a result, the support shaft 13B that is passed and assembled from the front side between the vertical surface portions of the bracket 13C is also provided in a state of being straightly directed in the sliding direction at the central portion in the width direction of the upper rail 12. .

  As shown in FIG. 5, the above-described three lock springs 13 </ b> A are disposed between the front and rear vertical surface portions of the above-described bracket 13 </ b> C bent into a U shape. Each of the lock springs 13A is supported by the bracket 13C via the support shaft 13B by inserting the support shaft 13B inserted between the longitudinal surface portions of the bracket 13C described above into the winding portion 13A1. ing. Each of the lock springs 13A is provided in a state in which the bracket 13C and the support shaft 13B described above are directed straight in the sliding direction at the center in the width direction of the top plate surface portion 12B of the upper rail 12, so that Each lock piece 13A2 is provided in a state of being uniformly projected from the central portion in the width direction of the upper rail 12 toward both outer sides (see FIGS. 3 to 4).

  As shown in FIG. 5, each of the lock springs 13A described above is formed such that each of the lock pieces 13A2 has an obliquely upward angle posture in the initial state, and the vertical surface portions 12A on the left and right sides of the upper rail 12 described above. Each of the through-grooves 12A1 is formed in a state of being passed from the lower side. As a result, when the lock springs 13A are in their free state, the lock pieces 13A2 on the left and right sides of the lock springs 13A are inserted into the two lock grooves 12A2 extending in the height direction from the through grooves 12A1. Each frame piece is held in a state of being inserted.

  As shown in FIGS. 3 and 9, each of the lock springs 13 </ b> A described above has a lower rail 11 positioned on both outer sides of the left and right lock grooves 12 </ b> A <b> 2 formed on the upper rail 12 when the upper rail 12 is assembled to the lower rail 11. It also enters into each lock groove 11B1, and the slide of the upper rail 12 with respect to the lower rail 11 in the front-rear direction is locked. However, as shown in FIGS. 9 to 19, each lock spring 13A has a groove width W wider than the cross-sectional diameter of each lock spring 13A as described above, and each lock groove 11B1 of the lower rail 11 has a predetermined interval (interval D1). ) Are arranged at equal intervals, so that any one or two of the upper rails 12 are always in any sliding position (see FIGS. 9 and 12 to 19). ) Are provided so as to be able to enter the respective lock grooves 11B1 of the lower rail 11.

  That is, each of the lock springs 13A described above is arranged at a slide position in which at least one of the upper rails 12 can always enter into each lock groove 11B of the lower rail 11 regardless of which slide position the upper rail 12 is in, and at least one of the remaining ones. One is configured to be disposed at a slide position on the shelf between the lock grooves 11 </ b> B <b> 1 of the lower rail 11. As a result, each lock spring 13A has a sliding direction in which at least one lock spring 13A that has entered into each lock groove 11B of the lower rail 11 is only inside each lock groove 11B, regardless of which slide position the upper rail 12 is in. It is regulated so that it cannot move.

  With this configuration, each lock spring 13A has only one lock spring 13A in each lock groove 11B, and when the upper rail 12 is allowed to slide within the regulation range, the upper rail 12 By sliding to a position regulated within the allowable range, another lock spring 13A can enter the lock groove 11B1, and the two lock springs 13A enter the lock grooves 11B1. Can be done. Each of the lock springs 13 </ b> A enters two lock grooves 11 </ b> B <b> 1 so that the slide of the upper rail 12 is completely regulated. At that time, one lock spring 13A arranged at the slide position on the remaining shelf is also passed through the constraining groove 11B2 formed on the same shelf, and the upper rail 12 is moved in the slide direction like the other lock springs 13A. It has come to function to regulate.

  Referring to FIG. 9, each of the lock springs 13A described above will be described in detail. The release member 16A assembled between the upper portions of the lock springs 13A is lifted by the slide lever 16B described above with reference to FIG. The lock pieces 13A2 on the left and right sides of the lock rail 13A2 lift the release member 16A upward by their elastic force, and the lock grooves 12A2 of the upper rail 12 and the lock grooves 11B1 of the lower rail 11 (or the restraining grooves). 11B2) and is energized to try to enter. Therefore, the slide position of the upper rail 12 is adjusted to a position where the lock grooves 12A2 of the upper rail 12 and the lock grooves 11B1 (or the restraining grooves 11B2) of the lower rail 11 are aligned with the slide direction. Each of the lock pieces 13A2 of at least one lock spring 13A is inserted into the lock grooves 12A2 and 11B1 (or the restricting groove 11B2) to restrict the slide of the upper rail 12.

  Further, as shown in FIGS. 10 to 11, the lock springs 13 </ b> A are provided on the left and right sides of the lock member 13 </ b> A by pushing down the release member 16 </ b> A described above by pulling up the slide lever 16 </ b> B described above with reference to FIG. 1. The pieces 13A2 are pushed and bent all at once by the release member 16A so as to be removed from the lock groove 11B1 (or the restraining groove 11B2) of the lower rail 11. Here, as shown in FIG. 5, the release member 16 </ b> A described above is formed in a shape in which one sheet of steel plate that is long in the slide direction is bent into an inverted U-shaped cross section. The release member 16A is assembled in a state of being supported so as to be movable up and down with respect to the bracket 13C by being assembled from above between the front and rear vertical surface portions of the bracket 13C.

  Specifically, the release member 16A described above has the guide protrusions 16A1 formed to project from the front and rear edges of the side portions on both the left and right sides, and the vertical surface portions on the front and rear sides of the bracket 13C between them. By being inserted from the upper side between the vertical surface portions so as to be sandwiched in the width direction, the bracket 13C is assembled so as to be guided so as to be vertically movable. The above-described release member 16A is provided with the respective notches in which the stopper pieces 16A2 formed so as to protrude from the front and rear edge portions of the upper surface portion are formed through the upper portions of the vertical surface portions of the bracket 13C. Each stopper piece 16A2 is assembled in such a way that it can be lowered to a position where it comes into contact with the bottom surface of each notch groove 13C2 through the groove 13C2. The upper half region of each vertical surface portion of the bracket 13C to which each guide protrusion 16A1 of the release member 16A is applied from both outer sides is formed in a constricted shape with a partially narrowed width.

  In addition, a plurality of slits through which the frame pieces on the front and rear sides of the lock pieces 13A2 on the left and right sides of the lock springs 13A can be passed from below on the bottoms of the left and right side portions of the release member 16A. A groove 16A3 is formed. The release member 16A described above is assembled to the upper portion of each lock piece 13A2 in a state where the frame pieces on the front and rear sides of the lock pieces 13A2 on both the left and right sides of the lock spring 13A are passed from the lower side in the slit grooves 16A3 described above. Thus, the frame pieces on the front and rear sides of the lock pieces 13A2 on the left and right sides of the lock springs 13A are held so as not to rattle in the sliding direction.

  As shown in FIGS. 10 to 11, the release member 16 </ b> A has an upper rail formed by a push plate 16 </ b> B <b> 3 attached to the rear end portion of the slide lever 16 </ b> B when the slide lever 16 </ b> B (see FIG. 1) is pulled up. It is operated so as to be pushed into 12. As a result, the release member 16A pushes and deflects the lock pieces 13A2 on the left and right sides of the lock springs 13A downward to release them from the lock grooves 11B1 and the restraining grooves 11B2 of the lower rail 11. Further, the release member 16A is released again by the elastic force of the lock pieces 13A2 on the left and right sides of the lock springs 13A described above by releasing the operation of lifting the slide lever 16B (see FIG. 1). The state is returned to the state described above with reference to FIG.

  Here, the left and right lock pieces 13A2 formed on each lock spring 13A described above are wound in a U-shape projecting from the rear portion or the front portion of the winding portion 13A1 of each lock spring 13A toward the left and right sides. It is formed so that it is formed at a position shifted in the front-rear direction (sliding direction). Accordingly, as shown in FIGS. 4 to 5, the slit grooves 16 </ b> A <b> 3 formed on the left and right side portions of the release member 16 </ b> A through which the frame pieces on the front and rear sides of the lock pieces 13 </ b> A <b> 2 are passed and the left and right sides of the upper rail 12. The lock grooves 12A2 on both sides, and the lock grooves 11B1 and restraint grooves 11B2 on the left and right sides of the lower rail 11 are also shifted from each other in the front-rear direction (sliding direction) to the left and right according to the position of the lock piece 13A2 of each lock spring 13A. It is in the state formed in the position.

  By the way, each lock spring 13A described above has a configuration in which each lock groove 11B1 of the lower rail 11 has a wide groove width W as described above and is arranged at equal intervals with a predetermined interval (interval D1). As a result, depending on the slide position of the upper rail 12, the two front lock springs 13A (each lock piece 13A2 thereof) may enter the lock groove 11B1 (see FIGS. 12 to 13), or the two rear lock springs 13A. (Each lock piece 13A2) enters the lock groove 11B1 (see FIGS. 14 to 15), or the front and rear lock springs 13A (each lock piece 13A2) enter the lock groove 11B1 (see FIG. 14). 16 to 17), each lock piece 13A2 of any two lock springs 13A is placed in each lock groove 11B1. It is adapted to lock so as to enter into.

  Thus, in a state where two of the three lock springs 13A (the respective lock pieces 13A2) enter the lock grooves 11B1 all at once, the lock springs 13A (the respective lock pieces 13A2) are placed in the respective lock grooves 11B1. The upper rail 12 is locked in a state where it cannot be slid in the front-rear direction with respect to the lower rail 11 (a state where it cannot be rattled). Yes.

  Further, when two of the three lock springs 13A (each of the lock pieces 13A2) can enter the lock grooves 11B1 all at once (the state shown in FIGS. 11 to 16), the remaining one shelf The lock springs 13A (each lock piece 13A2) at the slide position where they ride up enter the restraint grooves 11B2 formed on the same shelf, and the restraint grooves 11B2 restrict movement in the front-rear direction (slide direction). It is supposed to be in a state. Strictly speaking, each constraining groove 11B2 has a groove width in which the lock spring 13A (each lock piece 13A2 thereof) entered into the groove is in a state of entering with a slight gap in the sliding direction. It has a shape. As a result, each of the restraining grooves 11B2 has a lock spring 13A (of the lock spring 13A) that has entered the groove when a large load is input between the upper rail 12 and the lower rail 11 to forcibly displace them in the sliding direction. Each of the locking pieces 13A2) is brought into contact with each of the lock pieces 13A2 so as to receive a forced displacement force in the sliding direction acting between the rails 11 and 12.

  Further, as shown in FIGS. 18 to 19, each lock spring 13 </ b> A described above is located when the slide position of the upper rail 12 is located between the positions shown in FIGS. 12 to 17 (FIGS. 12 to 17). 17 (in the position other than the slide position shown in FIG. 17), only one of them (each of the lock pieces 13A2) can enter the lock groove 11B1 of the lower rail 11. When one of the three lock springs 13A (each lock piece 13A2) is inserted into each lock groove 11B1, the upper rail 12 is connected to the one lock spring 13A (front and rear sides of each lock piece 13A2). Each frame piece) can be slid in the front-rear direction with respect to the lower rail 11 within a range in which it can slide in the front-rear direction in each lock groove 11B1.

  However, when the upper rail 12 slides in the front-rear direction from the above state and the one lock spring 13A (each frame piece on the front and rear sides of each lock piece 13A2) reaches the end in each lock groove 11B1. The other remaining lock spring 13A (each lock piece 13A2) is also in a position where it can enter the lock groove 11B1, and the two lock springs 13A (each lock piece 13A2) enter the lock grooves 11B1 simultaneously. (Slide lock state described above). Along with this movement, the remaining one lock spring 13A (each lock piece 13A2) is also in a position state where it can enter the constraining groove 11B2 formed on the shelf between the lock grooves 11B1, and enters the groove. It is supposed to be in a state.

  In this way, each of the lock springs 13A described above can always take at least one into the lock groove 11B1 of the lower rail 11 regardless of the slide position of the upper rail 12, so that the upper rail 12 Regardless of the slide position, the upper rail 12 may be regulated so as not to slide more than a certain amount relative to the lower rail 11 even if an unexpected sudden slide operation such as a vehicle collision occurs. it can.

  More specifically, for example, the upper rail 12 is in a slide position where only one lock spring 13A (each lock piece 13A2) as shown in FIGS. 18 to 19 is not allowed to enter the lock groove 11B1 of the lower rail 11. Even if an unexpected sudden slide operation such as a vehicle collision occurs in a certain state, the sliding movement of the upper rail 12 relative to the lower rail 11 causes each lock spring 13 </ b> A (each lock of the lock spring 13 </ b> A) passed through the lock groove 11 </ b> B <b> 1 of the lower rail 11. The piece 13A2) is fastened to a position where it is caught by the end of the lock groove 11B1. At that position, the other lock spring 13A (each lock piece 13A2) that has been unlocked also enters the lock groove 11B1, so that a strong slide lock state can be obtained. With such a configuration, it is possible to prevent the so-called “tooth skip phenomenon” in which each lock spring 13 </ b> A passes through without entering into each lock groove 11 </ b> B <b> 1 of the lower rail 11.

  Here, referring to FIG. 5 and FIG. 9, each of the lock springs 13 </ b> A described above is configured so that the lock rails 13 </ b> A <b> 2 of the two lock springs 13 </ b> A pass through the lock grooves 11 </ b> B <b> 1 of the lower rail 11. It is set as the structure with high structural strength which can carry out slide lock with high lock strength with respect to the lower rail 11. FIG. In addition, the remaining one lock spring 13A is also formed on the shelf between the lock grooves 11B1 of the lower rail 11 when the lock pieces 13A2 of the two lock springs 13A enter and lock into the lock grooves 11B1 of the lower rail 11. By being able to enter the restraining groove 11B2, the slide of the upper rail 12 in the front-rear direction relative to the lower rail 11 can be locked with higher strength.

  More specifically, as described above, each lock spring 13A has a pair of left and right lock pieces 13A2 that can be hooked into the lock groove 11B1 and the restraining groove 11B2 of the lower rail 11, and each lock piece 13A2 The frame pieces on the front and rear sides can be individually hooked into the lock grooves 11B1 and the restraining grooves 11B2 of the lower rail 11, and the lock pieces 13A2 are arranged on the frame pieces on the front and rear sides. Are in a loop-like shape, and each frame piece is configured to have a high structural strength that is difficult to be twisted or bent individually. Each lock spring 13A is configured to have a short and high structural strength in which each lock piece 13A2 projects from the winding portion 13A1 to both sides in the width direction, which is the short direction of the lower rail 11.

  Furthermore, each lock spring 13A includes slit grooves 16A3 formed on the left and right side surfaces of the release member 16A, lock grooves 12A2 formed on the vertical surface portions 12A on the left and right sides of the upper rail 12, and left and right sides of the lower rail 11. The slide lock state is taken as a state of being passed through the lock groove 11B1 and the restraining groove 11B2 formed in the lower fin portion 11B. As a result, the lock springs 13A come into contact with the portions of the release member 16A, the upper rail 12, and the lower rail 11 at short intervals in the width direction in which the lock pieces 13A2 on both the left and right sides extend, It is designed to receive a shearing force in the sliding direction. As described above, each lock spring 13A has a configuration in which the distance between the input points in the width direction to which the shear load is input is short, and thus has a high structural strength that is not easily bent and bent by these loads. ing.

  For each of the reasons described above, each lock spring 13A has the lock rail 13A2 of the two lock springs 13A passed through the lock grooves 11B1 of the lower rail 11 so that the upper rail 12 has a high locking strength with respect to the lower rail 11. The slide can be locked. Each lock spring 13A slides in a form having a pair of lock pieces 13A2 projecting in a U shape in the cross-sectional direction and a winding portion 13A1 wound around and attached to the support shaft 13B by a single steel wire. It is in a state appropriately formed in a shape that is compact in the direction and has a pair of lock pieces 13A2 arranged side by side.

  Specifically, as shown in FIG. 22, each lock spring 13 </ b> A first has one side (illustrated) from the front end that is one end in the sliding direction toward the rear end that is the other end. The lock piece 13A2 on the left side is bent in a U-shape projecting to the left in the figure, and the bent back portion is returned to the end on one side (front side) in the sliding direction. The coil-shaped winding portion 13A1 is formed in such a manner that it is rewound, and the lock piece 13A2 on the other side (right side in the drawing) from the wound end again becomes the other end portion in the sliding direction. It is formed by being bent into a U-shape projecting rightward in the drawing.

  Each of the lock springs 13A has a restricting portion 13A3 bent at a right angle in a sliding direction (front direction or rear direction) opposite to each other at a front end portion which is the start of winding and a rear end portion which is the end of winding. The shape is formed. Each of the restricting portions 13A3 is formed as a front end portion of the left lock piece 13A or a rear end portion of the right lock piece 13A, and is formed on the left and right side walls of the release member 16A. It is set as the state assigned from. As shown in FIG. 23, each lock spring 13A is set in a state in which each restricting portion 13A3 is applied to the left and right side walls of the release member 16A as described above, so that the upper rail 12 and the lower rail are arranged as shown in FIG. 11, when a large load that forcibly displaces them in the sliding direction is input, the end portions of the lock springs 13A formed with the restricting portions 13A3 are connected to the lock grooves 11B1 of the lower rail 11 and the restraint. The movement to the outside from the groove 11B2 is appropriately suppressed.

  Specifically, in a state where each lock spring 13A enters and locks into each lock groove 11B1 and restraint groove 11B2 of the lower rail 11, they are forcibly displaced in the sliding direction between the upper rail 12 and the lower rail 11. When such a large load is input, the frame pieces on the front and rear sides of the lock pieces 13A2 that are in contact with the upper rails 12 and the lower rails 11 of the lock springs 13A in the sliding direction are respectively connected to the upper rails 12 and the lower rails 11 A bending force that is pushed in different sliding directions is applied.

  For example, when the upper rail 12 receives a large load such that the upper rail 12 is forcibly displaced forward with respect to the lower rail 11, each lock spring 13A has a lock piece 13A2 on the right side thereof and a front frame piece connected to the winding portion 13A1. The contact point of the lower rail 11 with the lock groove 11B1 or the restraining groove 11B2 is a fulcrum (bending rotation center R1), and the outer region (the region on the right side in the figure) is forward from the contact point with the lock groove 12A2 of the upper rail 12 May be subjected to a force that can be pushed and bent. As a result, the lock piece 13A2 on the right side of each lock spring 13A is moved outward from each lock groove 11B1 or restraint groove 11B2 of the lower rail 11 by the action of the rear frame piece connected to the restriction portion 13A3 due to the bending deformation described above ( It will receive a force in the direction of being pulled out (right side in the figure).

  However, even if the locking piece 13A2 on the right side of each lock spring 13A is applied with a force in the direction of being pulled out to the outside (right side in the drawing) on the rear frame piece connected to the regulating portion 13A3 as described above, the regulating portion 13A3 By being pressed against the side wall of the release member 16A from the inside, the movement in the direction of being pulled out to the outside is restricted. The restriction portion 13A3 is bent to the side (rear side) away from the rotation center R1 of the bending in which the front frame piece connected to the winding portion 13A1 of the right lock piece 13A2 of each lock spring 13A is pushed and bent. The configuration is such that the force in the direction of pulling out to the outside (right side in the figure) received around the bending rotation center R1 can be strongly received.

  On the other hand, the lock piece 13A2 on the left side of each lock spring 13A is a rear side connected to the winding portion 13A1 when a large load is applied such that the upper rail 12 is forcibly displaced forward relative to the lower rail 11. The frame piece has a contact point with the lock groove 11B1 or the restraining groove 11B2 of the lower rail 11 as a fulcrum (bending rotation center R2), and an outer region (region on the left side in the drawing) with the lock groove 12A2 of the upper rail 12. It may receive a force that pushes and bends forward from this contact. As a result, the lock piece 13A2 on the left side of each lock spring 13A is moved from the lock groove 11B1 or the restraining groove 11B2 of the lower rail 11 by the action of the front frame piece connected to the restricting portion 13A3 due to the bending deformation described above ( The force will be received in the direction pushed into the right side of the figure. Therefore, in this case, the front frame piece connected to the restriction portion 13A3 of the left lock piece 13A2 is unlikely to be pulled out from each lock groove 11B1 or the restraining groove 11B2 of the lower rail 11.

  As described above, since the left and right lock pieces 13A2 of each lock spring 13A are held without being pulled out from the lock grooves 11B1 or the restraining grooves 11B2 of the lower rail 11, they are input to the slide rail 10. A large load can be strongly received by each lock spring 13A. Unlike the case described above, when the upper rail 12 is subjected to a large load that is forcibly displaced rearward with respect to the lower rail 11, each lock spring 13A has its left and right lock pieces 13A2 By receiving force in a form that is pushed and bent in a symmetrical manner, it is possible to receive such a load strongly.

  In summary, the slide rail 10 of the present embodiment has the following configuration. That is, the slide rail 10 is configured to connect the seat 1 in a slidable state with respect to the floor F (vehicle body). The slide rail 10 is attached to the lower rail 11 (fixed side rail) attached to the floor F, the upper rail 12 (movable side rail) attached to the seat 1 so as to be slidable on the lower rail 11, and the upper rail 12. And a lock spring 13 </ b> A (lock member) that locks the slide between the rails 11 and 12 by urging into the lock groove 11 </ b> B <b> 1 formed in the lower rail 11. The lock spring 13A moves in a direction (height direction) perpendicular to the direction (width direction) in which the lock piece 13A2 extending in the width direction extending from the upper rail 12 to the lower rail 11 extends in the lock groove 11B1. The upper rail 12 (in this embodiment, the width direction of the upper rail 12 and the upper rail 12 is controlled so as to restrict the movement of the lock piece 13A2 in the extending direction (width direction) of the lock piece 13A2 from the position where the lock piece 13A2 enters the lock groove 11B1. There is a restricting portion 13A3 that abuts against the side wall of the release member 16A that forms an integral relationship.

  With such a configuration, the movement of the lock piece 13A2 coming out from the lock groove 11B1 (width direction) is restricted by the restriction portion 13A3. Therefore, even if the lock piece 13A2 is laterally bent by this force when a large load is input between the rails 11 and 12 so as to forcibly displace them in the sliding direction when the slide rail 10 is locked, It can be prevented from being moved in the direction of coming out of the groove 11B1.

  The lock spring 13A is formed such that the wire rod is bent into a U shape to form the lock piece 13A2 by U-shaped leg pieces, and the lock piece 13A2 enters the lock groove 11B1 by its own elastic restoring deformation. It becomes the composition which was made. One end of the U-shape of the lock spring 13A is wound around the support shaft 13B and attached to the upper rail 12, and the other end of the U-shape folded back is configured as a restricting portion 13A3 so that it can be prevented from being detached from the upper rail 12. It is set as the structure contact | abutted. With such a configuration, the restricting portion 13A3 can be easily set in a lock spring 13A of a type formed by bending a wire rod.

  The other end of the lock spring 13A, which is configured as the restricting portion 13A3, is folded back in the sliding direction. With such a configuration, the locking portion 13A2 can be strongly supported by the restricting portion 13A3 so that the lock piece 13A2 does not come out of the lock groove 11B1 when a heavy load is input.

  Further, as in the present embodiment, each end portion of the lock spring 13A is bent so as to contact the upper rail 12 without being wound around the support shaft 13B. The lock pieces 13A2 can be formed in a shape aligned in a side-by-side manner without being formed in a shape shifted from each other in the front-rear direction. Specifically, since each end portion of the lock spring 13A does not wind around the support shaft 13B, the frame piece of the lock piece 13A2 extending from the winding portion 13A1 of the lock spring 13A extends from a position side by side with each of the end portions. It can be made to come out. Further, in this embodiment, the restricting portion 13A3 is configured to abut against the side wall of the release member 16A that forms an integral relationship with the upper rail 12 in the width direction when a large load is input, but the side wall of the release member 16A is eliminated and the upper rail 12 It is good also as a structure which contact | abuts regulation part 13A3 directly to 12 A of vertical surface parts. Alternatively, the restricting portion 13A3 may be configured to abut against some other member that forms an integral relationship with the upper rail 12 in the width direction.

  As mentioned above, although the embodiment of the present invention has been described using one example, the present invention can be implemented in various forms in addition to the above example. For example, the “slide rail” of the present invention is a vehicle body that includes seats other than the right seat of an automobile, seats applied to vehicles other than automobiles, and seats used for various vehicles such as railways and airplanes. On the other hand, what is necessary is just to be provided as what is connected to the state which can slide. Further, the “slide rail” may be arranged in a horizontal posture without being inclined between the vehicle seat and the vehicle main body.

  Further, the “slide rail” may be configured such that the vehicle seat is connected to the vehicle body so as to be slidable in the lateral direction. Further, the “slide rail” may be used in such a manner that the fixed rail is tilted sideways by being attached to the side wall of the vehicle. As an example used for such a purpose, a seat back (vehicle seat), as disclosed in Japanese Patent Application Laid-Open No. 2010-274738, etc., a backrest angle with respect to a vehicle side wall (vehicle body) Can be used for applications that can be linked to a state where adjustments can be made.

  Moreover, in the said Example, although the lock spring was illustrated as what is corresponded to the "lock member" of this invention, the "lock member" of this invention was comprised as a lock spring formed by bending the filament material entirely. Alternatively, the claw member may be inserted into the lock groove by urging to be locked.

  Further, the “lock member” may be a member that is attached to the lower rail (one rail) and locks the slide between the two rails by entering into a lock groove formed in the upper rail (the other rail). Further, the “lock spring” configured as the “lock member” is not limited to three (or more) provided in order to prevent the “tooth skip phenomenon” in an emergency as shown in the above embodiment. It is sufficient that at least one is provided. Note that at least two “lock springs” may be provided in order to prevent a “tooth skip phenomenon” in an emergency. Further, the “lock spring” may be one in which a lock releasing operation is performed by a pulling operation instead of a pressing operation.

  Further, as shown in FIG. 24, the restricting portion 13A4 may be formed by being bent to the side close to the bending rotation centers R1 and R2 of the lock spring 13A (lock member) shown in the first embodiment. In addition, the restricting portion may be formed by being bent in the height direction. The restricting portion does not necessarily have to be formed at the end of the inner region when it enters the lock groove of the lock member, and is formed by being bent or caulked in the middle or attached with another member. It may be what was done. That is, the restricting portion abuts on one rail so as to restrict the movement of the lock piece entering the lock groove in the extending direction corresponding to the direction in which the lock piece of the lock member enters the lock groove. What is necessary is just to be formed.

1 seat 2 seat back 3 seat cushion 10 slide rail 11 lower rail (fixed side rail, other rail)
11A Bottom part 11B Lower fin part 11B1 Lock groove 11B2 Restraint groove 11B3 Protrusion part 11B3a Top plate surface 11C Clearance 11D Shoe stopper 12 Upper rail (movable side rail, one rail)
12A Vertical surface portion 12A1 Through groove 12A2 Lock groove 12B Top plate surface portion 12C Upper side fin portion 13 Lock mechanism 13A Lock spring (lock member)
13A1 Winding portion 13A2 Lock piece 13A3 Restriction portion 13A4 Restriction portion 13B Support shaft 13C Bracket 13C1 Fastening bolt 13C2 Notch groove 14 Resin shoe 15 Steel ball 16 Release mechanism 16A Release member 16A1 Guide projection 16A2 Stopper piece 16B Slide lever 16B Part 16B2 Hinge pin 16B3 Press plate 16B4 Through hole F Floor (vehicle body)
W Groove width D1-D3 spacing Ar Rail inner space H1-H3 Height R1, R2 Bending rotation center

Claims (3)

A slide rail for connecting the vehicle seat in a slidable state with respect to the vehicle body,
A fixed rail attached to the vehicle body;
A movable rail that is assembled to the fixed rail so as to be slidable and attached to the vehicle seat;
A lock member that is attached to one rail and locks the slide between the two rails by energizing into a lock groove formed in the other rail;
The lock member is configured such that a lock piece extending from the one rail to the other rail moves in a direction perpendicular to the extending direction of the lock piece and enters the lock groove, and the lock member A slide rail having a restricting portion that comes into contact with the one rail so as to restrict the movement of the piece from the position where the piece enters the lock groove in the extending direction of the lock piece. The slide rail according to claim 1,
The lock member bends the wire material into a U shape, forms the lock piece by U-shaped leg pieces, and allows the lock piece to enter the lock groove by its elastic restoring deformation. The lock spring
One end of the lock spring is attached to the one rail, and the other end of the U-shaped folded back is bent to form the restricting portion that comes into contact with the one rail so that it can be prevented from coming off. rail. The slide rail according to claim 2,
A slide rail in which the other end of the U-shaped return of the lock spring configured as the restricting portion is turned back straight in the slide direction.

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