JP2015033206A - Protector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protector capable of preventing a secondary collision caused by falling off from an attachment part and also preventing an electric wire from being broken.SOLUTION: Disclosed is a protector 11 which includes: a body 15 and a lid body 17 which form a cylindrical body capable of housing an electric wire therein by being engaged with each other; and a plurality of lock parts 41 capable of engaging the body 15 and the lid body 17 with each other and in which the lock parts 41 are arranged along the longitudinal direction the body 15 and the lid body 17 at a predetermined interval. The lock part 57 on one end side in the longitudinal direction of the body and the lid body is formed so as to be more easily disengaged than the lock part 59 on the other end side in the longitudinal direction of the body 15 and the lid body 17.

Description

  The present invention relates to a protector that combines a main body and a lid to form a cylindrical body that can accommodate an electric wire.

  For example, a protector disclosed in Patent Document 1 is known as a protector that is a cylindrical body that can store electric wires by being combined with each other. As shown in FIG. 8, the protector 505 is a cylindrical body formed by combining a main body 501 and a lid 503 with each other, houses an electric wire bundle 507 therein, and connects the main body 501 and the lid 503 to a lock 509. To fix. At this time, the backlash prevention lock portion 513 having the backlash prevention means 511 is arranged at least in two places among the lock portions 509 arranged at predetermined intervals along the longitudinal direction of the main body 501 and the lid portion 503. With a simple structure, the locking portion 509 can be prevented from rattling and the protector 505 can be prevented from being twisted.

In addition, there is known an electric junction box that allows the box body to escape in a predetermined direction in the event of a vehicle collision so as not to impair the crushable performance of the vehicle and to protect the box body from damage (e.g., patent document). 2).
Such an electrical junction box is provided with a mounting foot that forms a destruction inducing portion on the box body, and the mounting body is destroyed by an impact force acting on the box body at the time of a vehicle collision, so that the box body can move. It is configured.

JP-A-2005-160222 JP 2010-233357 A

In the conventional protector 505 described above, a wire bundle 507 is accommodated in a main body 501 fixed to an attachment portion such as a vehicle body, and a lid portion 503 is fixed to the main body 501 by a lock portion 509. Then, electrical components are connected to both ends of the wire bundle 507 through connectors or the like (not shown).
Therefore, when the electric component connected to the wire bundle 507 led out from one end in the longitudinal direction of the protector 505 is moved and the wire bundle 507 is pulled when the vehicle collides, the wire bundle 507 accommodated in the protector 505 is pulled. Adds an excessive tensile force. At this time, since the engagement allowance of the lock portion 509 is the same, in the protector 505 in which all the lock portions 509 are engaged with the same strength, the disengagement load of the lid portion 503 is large. For this reason, if the cover portion 503 remains fixed to the main body 501 without the lock portion 509 being damaged, the protector 505 may damage the sheath of the pulled wire bundle 507. Further, when the lock portion 509 that has been maintained to the limit is damaged, all the lock portions 509 are simultaneously damaged by the impact, the lid portion 503 is dropped, and the wire bundle 507 that is released at a stroke contacts other members. And may be damaged.

  Further, as in the electric junction box disclosed in the cited document 2, a breakage inducing portion is formed on a mounting foot (not shown) of the main body 501, and the mounting foot is broken by an impact force acting on the main body 501 at the time of a vehicle collision. When the protector 505 is configured to be movable, the protector 505 dropped from the attachment portion may cause a secondary collision with another member.

  This invention is made | formed in view of the said condition, The objective is to provide the protector which can prevent the failure | damage of an electric wire while preventing the secondary collision by dropping from an attaching part.

The above object of the present invention is achieved by the following configuration.
(1) A main body and a lid body that form a cylindrical body that can store electric wires by being combined with each other, and a plurality of lock portions that can engage the main body and the lid body with each other. A protector disposed at a predetermined interval along a longitudinal direction of the main body and the lid body, wherein the lock portion on one end side in the longitudinal direction of the main body and the lid body is a frame-shaped receiving portion provided on the main body And an engagement piece that is provided on the lid and is inserted and engaged with the receiving portion. The receiving portion is provided with an engaging beam portion, and the engaging piece is provided on the engaging beam portion. An engagement claw for engagement is provided, and the engagement claw of the lock portion provided at one end in the longitudinal direction has a smaller engagement allowance than the engagement claw of the lock portion provided at the other end in the longitudinal direction. A protector characterized by being formed.

According to the protector having the above configuration (1), the electric wire is housed in the main body fixed to the vehicle body or the like, and the engagement piece of the lock portion provided in the lid is formed on the receiving portion of the lock portion provided in the main body. When inserted, the engaging claw of the engaging piece gets over the engaging beam part, and then engages with the engaging beam part, so that the engagement piece is prevented from coming off from the receiving part. Thereby, the main body and the lid are fixed. Here, the engagement claw (one end side engagement allowance) of the engagement claw in the lock portion on the one end side in the longitudinal direction (one end side lock portion in the longitudinal direction) is the lock portion on the other end side in the longitudinal direction (the other end in the longitudinal direction). The engaging claw of the engaging claw in the side lock portion) is formed smaller than the engaging engagement margin of the other end side. As a result, the one end side lock portion in the longitudinal direction has a simple structure, and the engagement with the other end side lock portion in the longitudinal direction can be reliably released more easily.
At the time of a collision, when an electrical component or the like connected to an electric wire led out from one longitudinal end of the protector is moved and the electric wire is pulled, an engagement releasing load is applied to the longitudinal one end lock portion of the protector. When the disengagement load becomes equal to or greater than a predetermined value, the engagement between the receiving portion and the engagement piece at the one end side lock portion in the longitudinal direction is released. Part of the disengagement load is absorbed by the disengagement force at this time, and the other end side lock portion in the longitudinal direction in which the disengagement load is set larger than the one end side lock portion in the longitudinal direction is less likely to be disengaged. Become. As a result, it is possible to suppress the complete removal of the lid. Therefore, the wire pulled out by opening one end side in the longitudinal direction of the lid body is not subjected to an excessive tensile force, preventing damage to the coating and the other end side of the wire being held in the protector. It can stay in place.
In addition, the engagement release load of the lock portion can be set by changing the engagement allowance of the engagement claw formed on the engagement piece of the lid. Furthermore, the lock portion having various engagement release loads can be set at an arbitrary position without changing the receiving portion provided in the main body.

(2) The protector configured as described in (1) above, wherein the engagement claw of the lock portion provided on one end side in the longitudinal direction has the engagement allowance toward the distal end side in the protruding direction from the engagement piece. A protector characterized by being formed so as to gradually become smaller.

  According to the protector having the above configuration (2), the engagement claw is reliably engaged with the engagement beam portion with the engagement allowance of a predetermined area until the engagement release load does not exceed the predetermined value. The engagement reliability in the normal use state does not decrease. When the disengagement load exceeds a predetermined value, the engagement engagement margin is gradually separated from the engagement beam by the engagement disengagement load, and the engagement engagement margin becomes smaller than the minimum engagement maintenance area. The engagement between the claw and the engagement beam portion is released. Since the engagement claw is formed so that the engagement allowance gradually decreases toward the front end side in the protruding direction, the control of the minimum engagement maintaining area at this time becomes easy. That is, the engagement claw can be easily formed so that the engagement is released with a desired engagement release load.

(3) The protector configured as described in (2) above, wherein the engagement claw of the lock portion provided on one end side in the longitudinal direction has a width of the engagement claw of the lock portion provided on the other end side in the longitudinal direction. A protector characterized in that the width is made smaller and a C-plane is formed at the front end corner in the protruding direction.

  According to the protector having the configuration of (3) above, the engaging claw of the lock portion provided on one end side in the longitudinal direction has a simple shape, but the engagement beam portion necessary for releasing the lock from the engagement beam portion The amount of bending in the unlocking direction can be reduced. Therefore, the engagement claw of the lock portion provided on one end side in the longitudinal direction has a reduced lock release force and the engagement can be easily released more reliably than the engagement claw of the lock portion provided on the other end side in the longitudinal direction. Become.

  According to the protector according to the present invention, it is possible to prevent a secondary collision caused by dropping from the mounting portion and to prevent breakage of the electric wire.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

It is a disassembled perspective view of the protector which concerns on one Embodiment of this invention. It is the disassembled perspective view which looked at the protector shown in FIG. 1 from the arrow A direction of the figure. It is the disassembled perspective view which looked at the protector shown in FIG. 1 from the arrow B direction of the figure. It is an expansion perspective view of the engagement piece in a longitudinal direction other end side lock part. It is an expansion perspective view of the engagement piece in a longitudinal direction one end side lock part. (A) And (b) is the enlarged front view and enlarged bottom view of a longitudinal direction one end side lock part. It is an effect | action figure of the protector by which the longitudinal direction one end side lock part was disengaged. It is a disassembled perspective view of the conventional protector.

Embodiments according to the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 to 6, the protector 11 according to this embodiment includes a main body 15 and a lid body 17 that are combined with each other to form a long cylindrical body that can accommodate an electric wire 13 (see FIG. 7). Have. The main body 15 has both side portions 19 that face each other with the electric wire 13 interposed therebetween. Both side portions 19 stand from both sides along the longitudinal direction of the long bottom plate portion 21 disposed along the electric wires 13. That is, the main body 15 has a U-shape that is open upward in cross-section perpendicular to the longitudinal direction. The upper open portion becomes a main body opening 25 that opens the electric wire housing space 23 (see FIG. 1) inside the main body.

  In the protector 11 of the present embodiment, one electric wire 13 is accommodated in the main body 15, but the protector according to the present invention may accommodate a plurality of electric wires 13. The electric wire 13 may be an electric wire bundle in which a plurality of electric wires 13 are bundled.

  The main body 15 may be formed linearly or may be formed curved as in the present embodiment. As shown in FIG. 1, one end side electric wire lead-in / out section 27 is formed on one end side in the longitudinal direction of the main body 15 (left end side in FIG. 1), and the other end side in the longitudinal direction of the main body 15 (right end side in FIG. 1). The other end side electric wire lead-in / out part 29 is formed. The main body 15 is provided with a vehicle body fixing bracket portion 31 outside the one end side electric wire lead-in / out portion 27. The vehicle body fixing bracket portion 31 is formed with a vehicle body fixing locking projection 33 and a vehicle body fixing locking hole 35.

  The lid 17 is formed in a shape in plan view of the main body 15, that is, a shape following the main body opening 25. The lid body 17 has lid body edge portions 37 on both sides along the electric wire 13. In the present embodiment, the lid edge portion 37 is formed as an R-bending portion 39 that is bent and bent toward the main body 15. The outside of the R-bending portion 39 is aligned with the outside of the both side portions 19 of the main body 15 and is aligned.

  The main body 15 and the lid body 17 of the present embodiment are provided with a plurality of lock portions 41 along both longitudinal directions. The lock portion 41 engages the side portions 19 and the lid edge 37 with each other. The lock portions 41 are arranged at predetermined intervals along the longitudinal direction of the main body 15 and the lid body 17. The lock portion 41 includes a frame-shaped receiving portion 43 provided on each of the both side portions 19 and an engagement piece 45 provided on each of the lid body edge portions 37 and inserted and engaged with the receiving portion 43. The receiving portion 43 is provided on the outer surface 47 of the both side portions 19.

  As shown in FIG. 3, the receiving portion 43 protrudes in the form of a hollow cylinder on the outer surface 47 of the both side portions 19. The hollow cylindrical upper surface is an engagement piece insertion opening 49 (see FIG. 6) and has a rectangular hole. The receiving part 43 is opened to the outside by partly forming a cutout part 51. That is, the engagement piece insertion opening 49 is opened from the inside of the receiving portion 43 to the outside. The receiving portion 43 has an engaging beam portion 53 above the notch portion 51.

  The engagement piece 45 provided on each of the lid edge portions 37 protrudes from the outer surface (see FIGS. 4 and 5) of the R-bending portion 39 toward the main body 15. Two kinds of one end side engaging claws 61 and the other end side engaging claws 63 which will be described later project from the outer surfaces of these engaging pieces 45, and the one end side engaging claws 61 and the other end side engaging claws 63 are When the engagement pieces 45 are inserted into the engagement piece insertion openings 49, the engagement pieces 45 are engaged with the engagement beam portions 53 (see FIGS. 3 and 6), and the engagement pieces 45 are removed to the receiving portion 43. Stop.

  Here, in the protector 11 of the present embodiment, the lock portion 41 on one end side in the longitudinal direction of the main body 15 and the lid body 17 (that is, the one end side lock portion 57 in the longitudinal direction) is the other end in the longitudinal direction of the main body 15 and the lid body 17. It is easier to disengage than the lock portion 41 on the side (that is, the lock portion 59 at the other end in the longitudinal direction). In the present embodiment, the engagement hook 65 of the one end side engaging claw 61 of the longitudinal direction one end side lock portion 57 is formed smaller than the other end side engaging claw 63 of the longitudinal direction other end side lock portion 59. Engagement allowances 65 of the one end side engaging claws 61 and the other end side engaging claws 63 are each formed on a vertical surface with respect to the engaging piece 45.

Further, the one end side engaging claw 61 is formed so that the engaging hook 65 gradually decreases toward the distal end side in the protruding direction from the engaging piece 45. That is, the other end side engaging hook 73 of the other end side engaging claw 63 is formed in a rectangular shape as shown in FIG. As shown in FIGS. 5 and 6, the width W <b> 2 of the one end side engaging claw 61 is made smaller than the width W <b> 1 of the other end side engaging claw 63, and the C surface 62 is formed at the front end corner in the protruding direction. Thus, it is formed in a mountain shape that tapers toward the front end side in the protruding direction.
That is, as shown in FIG. 6, the one end side engaging claw 61 has a width W2 smaller than the width W1 of the other end side engaging claw 63, and a C surface 62 is formed at the tip end corner in the protruding direction. As a result, the amount of deflection of the engagement beam portion 53 required to release the lock from the engagement beam portion 53 in the unlocking direction (upward in FIG. 6B) can be reduced. Therefore, the lock releasing force of the one end side engaging claw 61 is reduced more than the lock releasing force of the other end side engaging claw 63, and the longitudinal direction one end side lock portion 57 is engaged more than the longitudinal direction other end side lock portion 59. Easy to release.

Next, the operation of the protector 11 having the above configuration will be described.
In the protector 11 according to the present embodiment, the electric wire 13 is accommodated in the main body 15 fixed to the vehicle body (attachment portion) 67 via the vehicle body fixing bracket portion 31, and the lid body 17 is held in the main body 15 by the lock portion 41. It is fixed (see FIG. 7). Electrical components (not shown) are connected to both ends of the electric wire 13 via connectors 69 and the like.

  At the time of a collision, when an electrical component connected to the electric wire 13 led out from one longitudinal end side of the protector 11 is moved and the electric wire 13 is pulled, an engagement releasing load is applied to the longitudinal one end lock portion 57 of the protector 11. Join. When the disengagement load becomes equal to or greater than a predetermined value, the engagement between the receiving portion 43 and the engagement piece 45 in the longitudinal one end side lock portion 57 is released. Part of the disengagement load is absorbed by the disengagement force at this time, and the disengagement of the longitudinal direction other end side lock part 59 in which the disengagement load is set larger than the longitudinal direction one end side lock part 57 is disengaged. It becomes difficult to be done. As a result, it is possible to suppress the complete removal of the lid body 17. Therefore, as shown in FIG. 7, the wire 13 that is pulled out by opening one end in the longitudinal direction of the lid body 17 is not subjected to an excessive tensile force, prevents damage to the coating, and the other end of the wire 13. The side is held in the protector 11 and can remain at a predetermined position of the vehicle body 67, and the electric wire 13 does not move more than necessary.

That is, according to the shape and mounting position of the protector 11 or the path and length of the electric wire 13, the longitudinal one end side locking portion 57 configured as a locking portion that can be easily disengaged and the other locking portions in the longitudinal direction. By adjusting the number and position of the other end side lock portions 59, the load applied to the electric wire 13 and the movement range of the electric wire 13 at the time of collision can be controlled to be optimal.
In the protector 11 according to the present embodiment, a plurality of lock portions 41 having two types of disengagement loads including a longitudinal direction one end side lock portion 57 and a longitudinal direction other end side lock portion 59 are provided. The plurality of lock portions 41 may be configured to have three or more types of disengagement loads. By providing a plurality of lock portions 41 having three or more types of disengagement loads, it is possible to more finely control the load applied to the electric wire 13 and the movement range of the electric wire 13 at the time of a collision.

  On the other hand, if the protector can be moved by forming a breakage-inducing portion on the mounting foot of the main body and the mounting foot is destroyed by the impact force acting on the main body in the event of a vehicle collision, it will fall off the mounting portion. There is a possibility that the protected protector may cause a secondary collision with other members. Further, in the conventional protector in which all the lock portions are engaged with high strength, the disengagement load is large. For this reason, if the lid remains fixed to the main body without damaging the lock portion, the protector may damage the pulled wire coating. Moreover, if the lock part which maintained the engagement to the limit is damaged, all the lock parts are damaged at the same time by the impact, the lid body is dropped, and the opened electric wire cannot stay in the protector 11 at once. There is a possibility of damage due to contact with other members.

  In the structure of the protector 11 according to the present embodiment described above, the impact is absorbed by releasing the engagement from the one end side lock portion 57 in the longitudinal direction at the initial stage where the engagement release load due to a collision or the like is applied. Further, it is possible to suppress the falling off of the lid body 17 and the protector 11.

  Further, when the engagement piece 45 of the longitudinal direction one end side lock portion 57 and the longitudinal direction other end side lock portion 59 provided in the lid body 17 is inserted into the receiving portion 43 of the lock portion 41 provided in the main body 15. The one end side engaging claw 61 and the other end side engaging claw 63 that have become wedge-shaped on the engaging piece 45 get over the engaging beam portion 53 and then engage with the engaging beam portion 53, and from the receiving portion 43. The disconnection of the engagement piece 45 is restricted. Thereby, the main body 15 and the lid body 17 are fixed. Here, the one end side engagement hook 71 of the one end side engaging claw 61 in the one end side lock portion 57 in the longitudinal direction is the other end side engaging hook of the other end side engaging claw 63 in the other end side lock portion 59 in the longitudinal direction. It is formed smaller than the generation 73. Accordingly, the one end side lock portion 57 in the longitudinal direction has a simple structure and can be easily released from the other end side lock portion 59 in the longitudinal direction.

Further, by changing the one end side engaging hook 71 of the one end side engaging claw 61 and the other end side engaging hook 73 of the other end side engaging claw 63 formed on the engaging piece 45 of the lid body 17, The disengagement load of the direction one end side lock part 57 and the longitudinal direction other end side lock part 59 can be set.
Furthermore, the lock part 41 having various engagement release loads can be set at an arbitrary position without changing the receiving part 43 provided in the main body 15. That is, the lock portion on the other end side electric wire lead-in / out portion 29 side of the main body 15 is simply disposed by disposing the one end side engaging claws 61 and the other end side engaging claws 63 formed on the engaging pieces 45 of the lid body 17 in the opposite direction. 41 can be formed more easily than the lock part 41 of the one end side electric wire lead-in / out part 27.

Further, the one end side engagement allowance 71 has a width W2 of the one end side engaging claw 61 smaller than a width W1 of the other end side engaging claw 63 and a C surface 62 formed at the front end corner portion in the protruding direction. Thus, it is formed in a mountain shape that tapers toward the front end side in the protruding direction. That is, the one end side engaging claw 61 is a simple shape in which the width W2 is narrowed and the C surface 62 is formed at the front end corner portion in the protruding direction, but is necessary for releasing the lock from the engaging beam portion 53. The amount of bending of the engagement beam portion 53 in the unlocking direction can be reduced. Accordingly, the one end side engaging claw 61 is less easily released than the other end side engaging claw 63 with a reduced lock releasing force.
Accordingly, the one end side engaging pawl 61 is normally engaged with the engaging beam portion 53 in a predetermined area until the engagement releasing load does not exceed a predetermined value. Engagement reliability in use is not reduced. When the disengagement load exceeds a predetermined value, the one end side engagement allowance 71 is gradually separated from the engagement beam portion 53 due to the disengagement load and becomes smaller than the minimum engagement maintaining area, and then the one end side engagement. The engagement between the pawl 61 and the engaging beam portion 53 is released. Thus, the one end side engaging claw 61 is formed so that the one end side engaging margin 71 gradually becomes smaller toward the distal end side in the protruding direction. Thereby, the one end side engagement nail | claw 61 can be easily formed so that engagement may be cancelled | released by desired engagement cancellation | release load.

Therefore, according to the protector 11 according to the present embodiment, it is possible to prevent a secondary collision caused by dropping from the vehicle body 67 and to prevent the electric wire 13 from being damaged.
In addition, the protector of this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

DESCRIPTION OF SYMBOLS 11 ... Protector 13 ... Electric wire 15 ... Main body 17 ... Cover body 41 ... Lock part 43 ... Receiving part 45 ... Engagement piece 53 ... Engagement beam part 65 ... Engagement allowance 57 ... Longitudinal direction one end side lock part (longitudinal direction one end Side lock)
59 ... Longitudinal direction other end side lock part (longitudinal direction other end side lock part)
61 ... One end side engaging claw 63 ... The other end side engaging claw 71 ... One end side engaging hook margin 73 ... The other end side engaging hook margin

Claims (3)

A main body and a lid body that form a cylindrical body capable of accommodating an electric wire by being combined with each other, and a plurality of lock portions capable of engaging the main body and the lid body with each other;
The protector in which the lock part is arranged at a predetermined interval along the longitudinal direction of the main body and the lid,
The lock portion on one end side in the longitudinal direction of the main body and the lid body has a frame-shaped receiving portion provided on the main body, and an engagement piece provided on the lid body and inserted and engaged with the receiving portion. And
The receiving part is provided with an engaging beam part,
The engaging piece is provided with an engaging claw that engages with the engaging beam portion,
The protector characterized in that the engagement claw of the lock part provided on one end side in the longitudinal direction has a smaller engagement allowance than the engagement claw of the lock part provided on the other end side in the longitudinal direction. .   The engagement claw of the lock portion provided on one end side in the longitudinal direction is formed so that the engagement allowance gradually decreases toward the distal end side in the protruding direction from the engagement piece. The protector according to claim 1.   The engaging claw of the lock portion provided on one end side in the longitudinal direction has a width smaller than the width of the engaging claw of the lock portion provided on the other end side in the longitudinal direction and C at the front end corner portion in the protruding direction. The protector according to claim 2, wherein a surface is formed.

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