JP4276549B2 - Sheet - Google Patents

Description

  The present invention provides a base provided on the floor side, a seat back provided on the base and supporting the back of the seated person, a seatable position in contact with the base side, and a tip-up position along the seat back. It is related with the sheet | seat which has the seat cushion provided in the said base so that rotation movement was possible.

  In recent years, in van type vehicles. In order to allow a large number of passengers to ride, there are often three rows of seats: front, second and third. In this case, the second seat and the third seat can be moved forward so that the luggage space behind the third seat can be expanded according to the loaded luggage, and the seat cushion of each seat is flipped up along the seat back. , There is one that can move to just after each second sheet.

  An example of this will be described with reference to FIG. In the figure, a seat 1 is composed of a seat cushion 3 that supports a seated person's buttocks and a seat back 5 that supports a seated person's back.

  The seat slide mechanism for moving the seat 1 in the front-rear direction includes a lower rail 7 provided on the floor side, an upper rail 9 provided with the seat 1 and movably engaged with the lower rail 7, and prohibiting movement of the upper rail 9. It has a locking mechanism that does not. This locking mechanism can be operated by an operating lever (not shown).

On the other hand, the tip-up mechanism includes a seatable position (a position indicated by a solid line) where the rear portion of the seat cushion 3 is rotatably attached to the upper rail 9 and can be seated, and a tip-up position where the seat cushion 3 extends along the seat back 5. (Position indicated by a two-dot chain line) can be rotated. A locking mechanism (not shown) that prohibits the rotation of the seat cushion 3 at the seatable position and the tip-up position is provided, and the locking mechanism can be operated by an operating lever 10 provided on the upper rail 9 side (for example, (See Patent Document 1).
Japanese Patent Laid-Open No. 11-227506 (FIG. 1)

  However, when the seat cushion 3 is rotated from the use position to the tip-up position and from the tip-up position to the use position in the seat 1 having the configuration shown in FIG. 4, the operation lever 10 must be operated. The operation is complicated.

  In addition, when expanding the luggage space behind the third seat according to the loaded luggage, it is preferable to provide a walk-in mechanism in which the second seat and the entire third seat advance when the reclining mechanism is unlocked without being seated. . The walk-in mechanism includes an urging unit that urges the seat back in a forward tilt direction, a mechanism that unlocks the seat slide mechanism when the seat back is tilted forward to a predetermined angle, and urges the entire seat forward. Biasing means. However, when the seat shown in FIG. 4 is provided with a walk-in mechanism, when the seat cushion 3 is in the tip-up position, the seat back 5 that is about to fall forward hits the seat cushion 3 and the seat back 5 reaches a predetermined angle. There is also a problem that the walk-in mechanism does not operate without falling forward.

  The present invention has been made in view of the above problems, and an object thereof is to provide a seat that is easy to operate and does not hinder the operation of the walk-in mechanism.

The invention according to claim 1 is along the base provided on the floor side, the seat back provided on the base and supporting the back of the seated person, the seatable position abutting on the base side, and the seat back. A seat having a seat cushion provided on the base so as to be capable of rotating between a tip-up position and the seat cushion side or the base side, wherein the seat cushion has a rotational axis. And a pin provided at a portion other than the seat cushion side and the base side, and is provided rotatably on the other side, and includes a first arm portion and a second arm portion. A contact surface that can be contacted, and the contact surface includes a first recess with which the pin engages when the seat cushion is positioned at a seatable position; and the seat cushion A hook second recess in which the pin is engaged is formed when positioned in tip-up position, locked to the second arm portion of the hook, the hook so that the contact surface is pressed against the pin And a biasing means for biasing the sheet.

  When the seat cushion is in the seatable position, the pin is engaged with the first recess of the hook. When the seat cushion in the seatable position is lifted and rotated in the direction of the tip-up position, the engagement between the pin and the first recess of the hook is released, and the pin and the contact surface of the hook move relative to each other while being pressed against each other. The second recess of the hook is engaged, and the seat cushion is in the tip-up position.

  When the seat cushion in the tip-up position is pushed down and rotated in the seatable position direction, the engagement between the pin and the second recess of the hook is released, and the pin and the contact surface of the hook move relative to each other while the pin is in contact with the pin. The first recess of the hook engages, and the seat cushion becomes a seatable position.

  In the invention according to claim 2, the urging means urges the seat cushion in the base direction when the seat cushion is in the seatable position, and the seat when the seat cushion is in the tip-up position. 2. The seat according to claim 1, wherein the cushion is urged in the seat back direction.

When the seat cushion is in the seatable position, the seat cushion is biased in the base direction by the biasing force of the biasing means. When the seat cushion is in the tip-up position, the seat cushion is biased in the seat back direction by the biasing force of the biasing means.
According to a third aspect of the present invention, the length from the rotation center of the hook to the first recess of the contact surface is longer than the length from the rotation center of the hook to the second recess of the contact surface. The sheet according to claim 1, wherein the sheet is set.

  In a preferred aspect of the present invention, the pin is provided on the seat cushion side, and the hook is provided on the base side. By providing a light weight pin on the seat cushion side, the weight of the seat cushion is reduced and operability is improved.

  Furthermore, in the invention according to claim 1, it is a preferable aspect that the hook is substantially V-shaped. Since the hook is substantially V-shaped, the space required for the operation of the hook can be reduced.

According to the first to third aspects of the present invention, there is no operation lever, and when the seat cushion is moved from the seatable position to the tip-up position and from the tip-up position to the seatable position, the seat cushion is lifted. The operation is simple because it can be pushed down.

Further, when the walk-in mechanism is provided in the seat of the invention according to claims 1 to 3 , even if the seat back falls forward, hits the seat cushion in the tip-up position, and the walk-in operation is interrupted, the seat When the back is pushed forward, the seat cushion rotates in the seatable position direction, so that the operation of the weak-in mechanism is not hindered.

  In addition, when the seat cushion is pushed down from the tip-up position toward the seatable position, the contact surface of the hook is pressed against the pin by the urging force of the urging means and becomes a resistance, so that the seat cushion is prevented from falling down suddenly. it can.

  According to the invention of claim 2, when the seat cushion is in the seatable position, the biasing means biases the seat cushion in the base direction, and the seat cushion is in the tip-up position. Sometimes, by urging the seat cushion in the seat back direction, the position (sitting position, tip-up position) of the seat cushion at that time is maintained even when a load in the front-rear direction acts on the seat.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. Initially, the whole structure of the sheet | seat of this example is demonstrated using Fig.3 (a). In the figure, the seat 11 includes a seat cushion 13 that supports a seated person's buttocks and a seat back 15 that supports the seated person's back.

  The seat slide mechanism 16 for moving the seat 11 in the front-rear direction includes a lower rail 17 provided on the floor side, an upper rail 19 (see FIG. 1) on which the seat 11 is provided and movably engaged with the lower rail 17, and an upper rail 19. It is composed of a lock mechanism (not shown) that prohibits movement. This locking mechanism can be operated by the operation lever 21.

  Further, the seat 1 of the present embodiment is provided with a reclining mechanism that tilts the seat back 15 in the front-rear direction with respect to the seat cushion 13. This reclining mechanism can be operated by the operation lever 23. A walk-in mechanism is also provided. This walk-in mechanism includes an urging means for urging the seat back 15 in the forward tilt direction, a mechanism for unlocking the seat slide mechanism when the seat back 15 is tilted forward to a predetermined angle, and the entire seat 11 forward. It consists of a biasing means for biasing.

  Further, the seat 1 of this embodiment is provided with a tip-up mechanism in which the seat cushion 13 jumps along the seat back 15 as shown in FIG.

  Next, the tip-up mechanism will be described with reference to FIGS. 1 and 2, which are enlarged configuration diagrams of the inside of the portion A in FIG. FIG. 1 is a configuration diagram when in a seatable position, and FIG. 2 is a configuration diagram when in a tip-up position. In these drawings, the upper rail 19 is provided with a base plate 31 (corresponding to a base provided on the floor side in claim 1).

  A frame 33 of the seat cushion 13 is rotatably attached to the base plate 31 using pins 35, and the seat cushion 13 can move between a seatable position shown in FIG. 1 and a tip-up position shown in FIG. ing. The base plate 31 is provided with a stopper 32 that contacts the frame 33 of the seat cushion 13 and prevents the seat cushion 13 at the seating position from further lowering. Further, the frame 33 is provided with a pin 37 at a portion other than the pin 35 which is a rotating shaft thereof.

  A substantially V-shaped hook 41 including a first arm portion 41 a and a second arm portion 41 b is rotatably attached to the base plate 31 using pins 39. The first arm portion 41a of the hook 41 is formed with a contact surface 43 having a circumferential surface around the pin 35 which is the rotation axis of the frame 33 (seat cushion 13) and capable of contacting the pin 37. ing. The contact surface 43 includes a first recess 45 in which the pin 37 engages when the seat cushion 13 is positioned at the seatable position, and a second recess in which the pin 37 engages when the seat cushion 13 is positioned in the tip-up position. 47 is formed.

  An intermediate portion of a torsion spring 51 as an urging means whose one end is locked to the base plate 31 is wound around the pin 35. The other end of the torsion spring 51 is locked to the second arm portion 41b of the hook 41 to urge the hook 41 so that the contact surface 43 is pressed against the pin 37, and the seat cushion is brought into a seatable position. In some cases, the seat cushion 13 is urged toward the base plate 31 (see FIG. 1), and when the seat cushion 13 is in the tip-up position, the seat cushion 13 is urged toward the seat back 15 (see FIG. 2). .

  Next, the operation of the above configuration will be described. As shown in FIG. 1, when the seat cushion 13 is in the seatable position, the pin 35 is engaged with the first recess 45 of the hook 41. At this time, the first arm portion 41a of the hook 41 pushes the pin 37 of the frame 33 of the seat cushion 13 in the arrow B direction by the urging force of the torsion spring 51, so that the frame (seat cushion 13) 33 moves in the direction of the base plate 31. Rotation is energized.

  When the seat cushion 13 at the seatable position is lifted and rotated in the tip-up position direction, the pin 35 is detached from the first recess 45 of the hook 41, and the pin 35 moves while being pressed against the contact surface 43 of the hook 41. The pin 35 engages with the second recess 47 of the hook 41, and the seat cushion 13 is in the tip-up position shown in FIG. At this time, due to the urging force of the torsion spring 51, the one standing wall 47a of the second recess 47 of the hook 41 pushes the pin 37 of the frame 33 of the seat cushion 13 in the direction of the arrow C, whereby the frame (seat cushion 13) 33 Is urged to rotate in the direction of the seat back 15.

  When the seat cushion 13 in the tip-up position is pushed down and rotated in the seatable position direction, the pin 35 is detached from the second recess 47 of the hook 41 and the pin 35 moves while being pressed against the contact surface 43 of the hook 41. Then, the pin 35 engages with the first recess 45 of the hook 41, and the seat cushion 13 becomes a seatable position.

According to such a configuration, the following effects can be obtained.
(1) When the seat cushion 13 is moved from the seatable position to the tip-up position and from the tip-up position to the seatable position without the tip-up mechanism operating lever, the seat cushion 13 can be lifted or pushed down. Because it is good, the operation is simple.
(2) By operating the walk-in mechanism, the seat back 15 falls forward, hits the seat cushion 13 in the tip-up position, and even if the walk-in operation is interrupted, if the seat back 15 is pushed in the forward fall direction, Since the seat cushion 13 rotates in the seatable position direction, the operation of the weak-in mechanism is not hindered.
(3) When the seat cushion 13 is pushed down from the tip-up position toward the seatable position, the contact surface 43 of the hook 41 is pressed against the pin 35 by the urging force of the torsion spring 51 and becomes a resistance. A sudden fall can be prevented.
(4) The torsion spring 51 as the urging means urges the seat cushion 13 in the base direction when the seat cushion 13 is in the seatable position, and the seat cushion 13 when the seat cushion 13 is in the tip-up position. By urging in the seat back direction, the position (sitting position, tip-up position) of the seat cushion 13 at that time is maintained even if a load in the front-rear direction acts on the seat.
(5) When the vehicle is head-on with the occupant seated, the hook 41 tends to rotate in the direction of the arrow D in FIG. 1 due to inertia. In this direction, the first recess 45 and the pin 37 further Since the direction is engaged, the seat cushion 13 can be prevented from being lifted.
(6) Since the light weight pin 35 is provided on the seat cushion 13 side, the weight of the seat cushion 13 is reduced and the operability is improved.
(7) Since the hook 41 is substantially V-shaped, the space required for the operation of the hook 41 can be reduced.

  The present invention is not limited to the above embodiment. Although the contact surface 43 in the above embodiment is a circumferential surface centered on the pin 35 that is the rotation axis of the frame 33 (seat cushion 13), the contact surface 43 is not limited to the circumferential surface shape. For example, it may be planar.

FIG. 4 is an enlarged configuration diagram of a portion A in FIG. 3A, illustrating a tip-up mechanism when in a seatable position. FIG. 4 is an enlarged configuration diagram of a portion A in FIG. 3A, illustrating a tip-up mechanism when in a tip-up position. It is a figure explaining the whole structure of the sheet | seat of this embodiment, (a) A figure shows the state which has a seat cushion in a seatable position, (b) The figure shows the state in which a seat cushion is in a chip up position. It is a figure explaining the conventional sheet | seat.

Explanation of symbols

13 Seat cushion 31 Base plate (base)
35 pins (rotary shaft)
37 pin 45 first recess 47 second recess 41 hook 51 torsion spring (biasing means)

Claims (3)

Rotates between a base provided on the floor side, a seat back provided on the base and supporting the back of the seated person, a seatable position in contact with the base side, and a tip-up position along the seat back In a seat having a seat cushion movably provided on the base,
Either the seat cushion side or the base side, and a pin provided on a portion other than the rotational axis of the seat cushion;
The other side of the seat cushion side and the base side is rotatably provided and includes a first arm portion and a second arm portion, and the first arm portion has a contact surface on which the pin can contact. The contact surface includes a first recess with which the pin engages when the seat cushion is positioned at a seatable position, and a second recess with which the pin engages when the seat cushion is positioned at the tip-up position. A hook formed with,
An urging means for urging the hook such that the hook is engaged with the second arm portion of the hook and the abutting surface is pressed against the pin;
A sheet characterized by comprising: The biasing means is
When the seat cushion is in a seatable position, the seat cushion is biased in the base direction, and when the seat cushion is in a tip-up position, the seat cushion is biased in the seat back direction. The sheet according to claim 1. The length from the rotation center of the hook to the first recess of the contact surface is set to be longer than the length from the rotation center of the hook to the second recess of the contact surface. The sheet according to claim 1 or 2.

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