JP4170885B2 - Adapter for wiring box - Google Patents

Description

  The present invention relates to a wiring box adapter for connecting a plurality of conduits to a wall portion of a wiring box.

  Conventionally, a conduit tube is connected to the wall portion of the wiring box having an elongated rectangular box shape, and the cable drawn into the wiring box is protected by the conduit tube. An adapter is used as a method of connecting a conduit to the wall of the wiring box (see, for example, Patent Document 1). A mounting hub for a box as an adapter described in Patent Document 1 (hereinafter simply referred to as a mounting hub) includes an insertion port that is inserted into a knockout formed in the short wall at one end, and the other end. A cylindrical conduit insertion port is provided that allows the conduit to be inserted. Furthermore, a locking claw for locking to the outer surface of the conduit inserted into the conduit insertion port is formed on the peripheral wall forming the conduit insertion port. Then, when the insertion port is inserted into the knockout, the conduit tube is inserted into the conduit insertion port, and the locking claw is locked to the conduit tube, the mounting tube is used to prevent the conduit tube from coming off. Can be connected to the wall.

In addition, as another method for connecting the conduit to the wall portion of the wiring box, there is a method in which a set portion is provided on the wall portion (see, for example, Patent Document 2). A set portion having a substantially cylindrical shape protrudes from the wall portion of the wiring box, and inside the set portion, a pair of holes into which the end portions of the respective wire protection tubes can be inserted, and the holes are provided. A communication portion for communication is formed. Each hole communicates with a connection port drilled in the wall. In addition, the duplex electric wire protection tube as an electric wire pipe connected to a set part is a thing in which two electric wire protection tubes are connected via the connection part over the whole length direction. Then, the end of the conduit is inserted into each hole, the inside of the conduit is connected to the connection hole, and the connecting portion is inserted into the communication portion. It is connected to the wall portion through the set portion in a retaining state.
Japanese Utility Model Publication No. 4-48091 JP 2002-165329 A

  However, when the mounting hubs described in Patent Document 1 are connected to the short wall one by one, the peripheral walls of the conduit insertion ports interfere with each other, and the connection work to the wall portion of the mounting hub, and thus the mounting hub, is used. It is very difficult to connect to the wall of the conduit. In addition, in order to connect a pair of conduits having a diameter larger than that of the knockout to the short wall, when a mounting hub having a large diameter is used, the peripheral walls of the conduit insertion ports interfere with each other. Thus, a pair of conduits having a diameter larger than that of the knockout cannot be connected to the short wall. That is, when connecting a plurality of conduits to the wall portion of the wiring box using the mounting hub, there is a problem that the peripheral wall of the adjacent conduit insertion port becomes an obstacle and the connecting operation of the conduits is very difficult. It was.

Moreover, in the technique of patent document 2, since the communication part was formed between holes, there existed a problem that it could not connect in the state which made the conduits contact or approached.
The present invention has been made paying attention to the problems existing in the above-described conventional technology. An object of the invention is to provide a wiring box adapter that can easily connect a plurality of electric conduits in contact with or close to each other.

In order to solve the above problems, the invention according to claim 1 is an adapter for a wiring box that is used to connect a conduit to a wall of a wiring box and is provided separately from the wiring box. An adapter main body having a tubular shape into which a plurality of conduits can be inserted; and an attachment portion for attaching the adapter main body to a wall portion of the wiring box. The gist of the present invention is that a series of insertion spaces are formed in which a plurality of conduits can be inserted in contact with each other.

  According to a second aspect of the present invention, in the wiring box adapter according to the first aspect, the adapter main body includes a plurality of insertion portions that are capable of individually inserting a plurality of conduits one by one. The gist is that the internal space of each insertion portion is communicated by a communication portion formed between adjacent insertion portions, and a series of insertion spaces are formed in the adapter body.

  According to a third aspect of the present invention, in the adapter for a wiring box according to the first or second aspect, the adapter main body is formed with a notch groove for bending and deforming the adapter main body, and the attachment portion. Is provided with a locking piece that can be locked to the inner surface of the peripheral edge of the through hole formed in the wall.

  The gist of the invention according to claim 4 is the adapter for a wiring box according to claim 3, wherein the notch groove is formed in the adapter main body so as to be positioned on the same straight line as the communication portion. .

  According to a fifth aspect of the present invention, in the wiring box adapter according to any one of the first to fourth aspects, the adapter body is formed with a locking claw for locking to the outer surface of the conduit. It is a summary.

(Function)
Therefore, according to the first aspect of the present invention, an insertion space is formed in the adapter body, and a plurality of conduits can be inserted into the insertion space. And all the electric pipes will be inserted in one space, and there is no thing which separates between adjacent electric pipes in the insertion space. Therefore, it connects to a wall part in the state in which the outer surface of the adjacent conduit tube contacted or approached.

  According to the invention described in claim 2, in addition to the operation of the invention described in claim 1, the adapter main body has a plurality of insertion portions, and the internal spaces of each insertion portion are communicated by the communication portion. Yes. For this reason, when a conduit tube is inserted into each insertion portion, each conduit tube can be held individually, and a part of the peripheral surface of the adjacent conduit tube enters the communication portion and contacts each other. It becomes a state.

  According to the invention described in claim 3, in addition to the action of the invention described in claim 1 or 2, the width of the notch groove is narrowed to bend and deform so as to narrow the insertion space of the adapter body. Is possible. Furthermore, the locking piece can be passed through the through-hole as the adapter main body is bent and is easily arranged from the outer surface side to the inner surface side of the wall portion.

  According to the invention of the fourth aspect, in addition to the action of the invention of the third aspect, the communication part and the notch groove are positioned on the same straight line. It becomes easier to bend and deform the main body.

  According to invention of Claim 5, in addition to the effect | action of the invention as described in any one of Claims 1-4, an electric wire pipe | tube is made into an adapter main body by the latching to the electric pipe of a latching claw. It is possible to connect to a state where it is prevented from coming off.

  ADVANTAGE OF THE INVENTION According to this invention, the adapter for wiring boxes which can connect easily in the state which mutually contacted or approached the some electric wire pipe can be provided.

Hereinafter, an embodiment of a wiring box adapter embodying the present invention will be described with reference to FIGS.
First, as shown in FIG. 1, a conduit 10 connected to a wiring box 11 made of synthetic resin will be described. The conduit tube 10 is formed of a synthetic resin material into a flexible pipe shape, and has a ridge portion 10a having a ring shape with the same diameter protruding in the circumferential direction, and a ridge portion 10b having a ring shape with the same diameter. Are repeatedly formed in a concavo-convex shape.

  Next, the wiring box 11 will be described. The wiring box 11 is formed in a rectangular box shape having an opening on one side from a rectangular bottom wall 12 and an upper side wall 12a, a lower side wall 12b, a left side wall 12c, and a right side wall 12d erected from the bottom wall 12. Is formed. The bottom wall 12, the upper side wall 12 a, the lower side wall 12 b, the left side wall 12 c and the right side wall 12 d constitute a wall portion of the wiring box 11. On the outer surface of the left side wall 12c, a contact seat portion 14 having a certain thickness is formed to protrude outward.

  As shown in FIG. 3, a pair of through holes 18 are formed through the side walls 12a and 12b on the left side of the upper side wall 12a and the lower side wall 12b (only the upper side wall 12a is shown in FIG. 3). Yes. One of the pair of through holes 18 (left side in FIG. 3) is opened, and the other (right side in FIG. 3) through hole 18 is closed by a knock portion 19. Further, an engaging protrusion 22 is formed on the inner peripheral edge of the other through-hole 18 so as to extend along the inner peripheral edge. When a wiring box adapter 30 to be described later is connected to the pair of through holes 18 and the pair of conduits 10 is connected to the wiring box adapter 30, the pair of conduits 10 are brought into close contact with each other. The interval between the through holes 18 is set.

  Next, the wiring box adapter 30 will be described. As shown in FIG. 2A, the synthetic resin wiring box adapter 30 includes an adapter main body 32 in which two insertion portions 31 each having a substantially cylindrical shape are juxtaposed to form an outer shell. An internal space 37 is formed in each insertion portion 31, and an insertion port 31 a of each insertion portion 31 is provided at one end (upper end) of the adapter body 32 serving as one end (upper end) of the insertion portion 31. It opens in communication with the internal space 37. The inner diameter of each insertion portion 31 is formed larger than the diameter (width) of the through hole 18, and the conduit 10 can be inserted into the internal space 37 of the insertion portion 31 from each insertion port 31 a. As shown in FIG. 4, the inner side of the other end side (lower end side) of each insertion portion 31 is slightly reduced in diameter so that the end face of the conduit 10 inserted into the insertion portion 31 comes into contact. Yes. When the pair of conduits 10 is inserted into the adapter main body 32, that is, each insertion portion 31, the conduit 10 is held from the outer peripheral side by each insertion portion 31 as shown in FIG. 5.

  As shown in FIG. 2A, a communication portion 33 is formed between the insertion portions 31. This communication part 33 makes the internal space 37 of both the insertion parts 31 communicate, and as shown in FIG. 5, the outer surfaces of the conduit 10 inserted in each insertion part 31 contact. In addition, contacting the outer surfaces of the conduit 10 means that the outer surfaces of the conduit 10 are in contact with each other in a state where the conduit 10 is inserted into the insertion space S. In addition, although the conduit 10 is inserted into the insertion portion 31 in a slightly separated state, the outer surfaces of the conduit 10 are also brought into contact with each other within the communication portion 33 when the conduits 10 are brought close to each other. Means contact. Further, the communication portion 33 is formed at a position where the peripheral walls of both insertion portions 31 overlap with each other when the peripheral walls of both insertion portions 31 are assumed to be cylindrical. The adapter main body 32 is formed along the outer peripheral surfaces of the two conduits 10 with the outer surfaces of the pair of conduits 10 in contact with each other. As shown in FIG. 2A, the adapter main body 32 is formed with a series of insertion spaces S in which the pair of internal spaces 37 communicate with each other through the communication portion 33.

  Cutout grooves 34 are formed on the side surfaces of both insertion portions 31 which are both ends in the length direction of the adapter main body 32, and each cutout groove 34 is formed at a position sandwiching the communication portion 33. That is, both the notch grooves 34 and the communication part 33 are formed so as to be positioned on a straight line passing through the adapter main body 32. Each notch groove 34 extends from the lower end of the insertion portion 31 toward the upper end side, and extends to the center of the insertion portion 31. The adapter main body 32 can be bent and deformed in the width direction by both the cutout grooves 34 and the communication portion 33.

  As shown in FIG. 2 (b), locking claws 35 are formed at opposing positions on the peripheral wall of each insertion portion 31. Each of the locking claws 35 is formed so as to be elastically deformable, and is formed so that the tip portion protrudes into the insertion portion 31. A pair of locking projections 36 are provided on the lower end surface of each insertion portion 31 so as to face each other, and a locking piece 36 a is provided on the outer surface of each locking projection 36. Each locking piece 36a is formed in a tapered shape that becomes wider from the distal end of the locking projection 36 toward the proximal end. By providing the locking projection 36 and the locking piece 36a on the adapter body 32, the adapter body 32 can be attached to the upper side wall 12a or the lower side wall 12b as a wall portion. The locking piece 36a constitutes an attachment portion. When the wiring box adapter 30 is attached to the upper side wall 12a or the lower side wall 12b of the wiring box 11, the locking protrusions 36 of the respective insertion portions 31 correspond to one through hole 18, respectively. 18 to form a locking relationship.

  In order to connect the pair of conduits 10 to the wiring box 11 using the wiring box adapter 30, first, in the wiring box 11, the knock portions 19 are removed and both through holes 18 are opened. Next, the insertion space S of the adapter main body 32 is bent and deformed so as to narrow the communication portion 33 and the notch groove 34, and the interval between the locking projections 36 is narrowed. 18 is inserted. Next, as shown in FIG. 4, when the bending deformation of the insertion portion 31 is released, each locking projection 36 is deformed in a direction away from each other by the restoring force of each insertion portion 31 to the original shape. Then, the lower end surface of the one insertion portion 31 and the locking piece 36a are engaged with the peripheral portion of one through hole 18 (left side in FIG. 4), and as shown in FIG. The stop piece 36 a is locked to the inner surface of the upper side wall 12 a that is the peripheral edge of the through hole 18. In addition, the engagement protrusion 22 of the other through hole 18 is engaged between the lower end surface of the other insertion portion 31 and the locking piece 36 a, and the locking piece 36 a is connected to the peripheral portion of the through hole 18. The engaging protrusion 22 is locked. As a result, as shown in FIGS. 1 and 5, the wiring box adapter 30 is connected to the upper side wall 12a of the wiring box 11 in a state of being prevented from coming off, and the inside of each insertion portion 31 and the through hole 18 are connected. Correspondingly, the inside of the wiring box 11 and the inside of the plug-in part 31 communicate with each other.

  Next, when the conduit 10 is inserted inside each insertion portion 31, as shown in FIG. 6, the locking claw 35 enters the recessed strip portion 10 b of each conduit 10, and the locking claw 35 protrudes. Locks to the outer surface of the strip 10a. At this time, each insertion portion 31 is pushed and spread from the inside by the conduit 10, so that the inner peripheral surface of the insertion portion 31 is pressed against the outer peripheral surface of the conduit 10 and each conduit 10 is held by the adapter body 32. Is done. Further, as the insertion portion 31 is pushed and expanded by the conduit 10, the locking projections 36 are also urged away from each other. Therefore, the locking piece 36 a is firmly locked to the inner surface of the upper side wall 12 a that becomes the peripheral edge of the through hole 18.

  As shown in FIG. 5, in a state where the pair of conduits 10 are inserted into the adapter main body 32, that is, into the insertion space S, a part of the peripheral surface of both the conduits 10 enters the communicating portion 33, respectively. The surrounding circumferential surfaces come into contact with each other in the communication portion 33. In addition, since each conduit 10 is held in the insertion portion 31 and is in contact with each other, the pair of conduits 10 are positioned in the insertion space S in the insertion state with respect to the wiring box adapter 30. There is no deviation. Therefore, the wiring box adapter 30 is connected to the wiring box 11 with the pair of conduits 10 in contact with each other.

According to the wiring box adapter 30 of the above embodiment, the following effects can be obtained.
(1) The adapter main body 32 has two substantially cylindrical insertion portions 31 arranged in parallel to form an outer shell, and the internal spaces 37 communicate with each other through the communication portions 33 in the adapter main body 32. A space S is formed. And the electric conduit 10 inserted in each insertion part 31 can be mutually contacted by the communication part 33. FIG. Therefore, by using the wiring box adapter 30, the pair of conduits 10 can be connected to the wiring box 11 in a state where they are in contact with each other. Moreover, a pair of electric conduit 10 is connected to the upper side wall 12a only by inserting the electric conduit 10 in each insertion part 31. FIG. Therefore, unlike the conventional case where each conduit 10 is connected to the upper side wall 12a using a separate mounting hub, the connecting operation of the conduit 10 can be easily performed.

  (2) The wiring box adapter 30 has a pair of insertion portions 31 arranged in parallel, and a communication portion 33 is formed at a position where the peripheral walls of both insertion portions 31 overlap. Therefore, unlike the case where the wiring box adapter 30 is formed by directly joining cylindrical members, the length of the wiring box adapter 30 in the lateral direction can be shortened by the thickness of the peripheral wall at the overlapping position. Therefore, the number of conduits 10 that can be connected to one side wall can be increased as compared with the conventional case where a plurality of mounting hubs are used and a peripheral wall of the conduit insertion port exists between the conduits 10. Further, by using the wiring box adapter 30, it becomes possible to connect the conduit 10 having a diameter larger than that of the through hole 18, and to reduce the amount of the conduit 10 protruding from the outer wall of the upper side wall 12a. Can do. This is because the conduit 10 can be connected to the small-sized wiring box that can connect only one conduit having a smaller diameter than the conduit 10 by using the adapter 30 for the wiring box. it can.

  (3) By using the wiring box adapter 30, it is possible to connect the conduit 10 having a larger diameter than the conduit corresponding to the diameter of the through hole 18 to the wiring box 11. Therefore, cables can be inserted into the large-diameter conduit 10 and the insertion operation can be easily performed.

  (4) By forming the communication part 33 in the adapter main body 32, it becomes the structure where the internal space 37 of the insertion part 31 is connected, and it can connect to the wiring box 11 in the state which made a pair of conduits 10 contact. . Therefore, the inside of the pair of conduits 10 can be made to correspond to the through holes 18, and the cables can be easily drawn into the wiring box 11.

  (5) When the pair of conduits 10 are inserted into the adapter main body 32, the respective insertion portions 31 are expanded from the inside, and the locking protrusions 36 are attached toward the peripheral portion of the through hole 18 along with the expansion. You can Accordingly, each locking projection 36 is firmly locked to the inner peripheral edge of the through hole 18, and the locking piece 36a is securely locked to the peripheral edge of the through hole 18, so that the wiring box adapter 30 is It is possible to eliminate the problem of detachment from the box 11.

  (6) The adapter body 32 is formed with a communication portion 33 and a pair of cutout grooves 34 so as to be positioned on a straight line. For this reason, the work of narrowing the insertion space S of the adapter main body 32 is easily performed, the work of passing the locking piece 36a through the inside of the through hole 18 can be easily performed, and the wiring box adapter 30 is connected to the wiring box. 11 can be easily performed.

In addition, you may change the said embodiment as follows.
In the embodiment, when it is assumed that the peripheral walls of both insertion portions 31 are cylindrical, the peripheral walls of both insertion portions 31 are formed at positions where they overlap each other, but the conduit 10 is inserted into each insertion portion 31. If the conduits 10 are in contact with each other or in an approaching state, the position of the communication portion 33 may be set arbitrarily.

  The communication portion 33 and the notch groove 34 are formed so as to be positioned on a straight line extending in the length direction of the adapter main body 32. However, if each insertion portion 31 can be bent and deformed, the notch groove 34 is formed. The position of may not be limited to the above. Further, the notch groove 34 may be omitted.

  -In embodiment, although the insertion part 31 was materialized in the adapter 30 for wiring boxes formed in two places, the insertion part 31 is formed in three or more places, and connects the three or more conduits 10 in parallel. You may embody in the adapter 30 for wiring boxes provided with the adapter main body 32 which can be.

  For example, when the through-hole 18 is formed in three or more places in the upper side wall 12a, the wiring box adapter 30 in which the insertion part 31 is formed in three or more places may be used. A plurality of wiring box adapters 30 formed at two locations may be used in combination. Alternatively, there may be a place where the conduit 10 is connected to the wiring box 11 using the wiring box adapter 30 and a place where the conduit 10 is directly connected to the through hole 18 without using the wiring box adapter 30. .

In the embodiment, each plug-in portion 31 has a substantially cylindrical shape, but may be changed to a shape close to a square tube shape, a triangular tube shape, or the like as long as the conduit 10 can be held.
-In embodiment, although the conduit tube 10 formed in the uneven | corrugated shape was used, you may use what the outer peripheral surface is not formed in the uneven | corrugated shape.

  In the embodiment, the conduit 10 is connected to the upper side wall 12a as the wall portion using the wiring box adapter 30. However, at least of the bottom wall 12, the lower side wall 12b, the left side wall 12c, or the right side wall 12d as the wall portion. The conduit 10 may be connected to one using the wiring box adapter 30.

  In the embodiment, the locking protrusion 36 and the locking piece 36a are embodied as the attachment portion, but the locking piece 36a is omitted, and a locking recess is provided in the locking protrusion 36. On the other hand, a locking projection that can be locked to the locking recess is formed on the peripheral edge of the through hole 18. Then, the adapter main body 32 may be attached to the wall portion by locking the locking recess and the locking projection.

  In the embodiment, the adapter main body 32 is provided with a pair of insertion portions 31 arranged side by side. However, the adapter main body 32 has a cylindrical shape having a long hole shape (track shape) in plan view, and the insertion space of the adapter main body 32 is When a plurality of conduits 10 are inserted into S, the conduits 10 may be in contact with each other.

Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.
(1) The communication part is formed at a position where the peripheral walls of the adjacent insertion parts overlap each other when the peripheral wall of the insertion part is assumed to be cylindrical. The adapter for wiring boxes as described in any one of claim | item 5.

The perspective view which shows the state which connected the conduit tube to the wiring box using the adapter for wiring boxes. (A) is a perspective view which shows the adapter for wiring boxes, (b) is a side view which shows the adapter for wiring boxes. The top view which shows a wiring box. The top view which shows the state which connected the adapter for wiring boxes to the wiring box. The top view which shows the state which connected the conduit to the adapter for wiring boxes. Sectional drawing which shows the state which connected the conduit to the adapter for wiring boxes.

Explanation of symbols

  S: Insertion space, 10: Conduit, 11: Wiring box, 12: Bottom wall as a wall part, 12a ... Upper side wall as a wall part, 12b ... Lower side wall as a wall part, 12c ... Left side as a wall part Wall: 12d: right side wall as a wall portion, 18: through hole, 30 ... adapter for wiring box, 31 ... insertion portion, 32 ... adapter body, 33 ... communication portion, 34 ... notch groove, 35 ... locking claw, 36... Locking protrusions constituting the attachment part, 36 a... Locking pieces constituting the attachment part, 37.

Claims (5)

It is used to connect a conduit to the wall of the wiring box, and is a wiring box adapter provided as a separate body from the wiring box,
A cylindrical adapter body that allows insertion of a plurality of conduits, and an attachment portion that is provided in the adapter body and attaches the adapter body to the wall portion of the wiring box ,
The adapter main body is formed with a series of insertion spaces in which a plurality of conduits can be inserted while being in contact with each other.   The adapter body is provided with a plurality of insertion parts that can be inserted into a plurality of conduits one by one, and a communication part formed between adjacent insertion parts allows the insertion of each insertion part. The adapter for a wiring box according to claim 1, wherein the internal space communicates to form a series of insertion spaces in the adapter body.   The adapter body is formed with a notch groove for bending and deforming the adapter body, and the attachment portion is provided with a locking piece that can be locked to the inner surface of the peripheral portion of the through hole formed in the wall portion. The adapter for a wiring box according to claim 1 or 2, wherein the adapter is provided.   The adapter for a wiring box according to claim 3, wherein the notch groove is formed in the adapter main body so as to be positioned on the same straight line as the communication portion.   The adapter body for a wiring box according to any one of claims 1 to 4, wherein a locking claw for locking to the outer surface of the conduit is formed in the adapter body.

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