JP2008125274A - Protector for wiring harnesses - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance strength to a load placed on a protector from a perpendicular direction without increasing a cost and weight by devising a cross sectional shape of the protector. <P>SOLUTION: The protector comprises a main body and a cover mounted outside a wiring harness for an automobile, and the cover is arranged as a protector at a position where an external load is applied. The main body and the cover are composed of molded products of resin formed by integral extrusion molding, and the main body is formed into a gutter of a concave shape in cross section having a bottom wall and both side walls. The cover is connected with one side wall of the main body through a hinge, and an opening of the upper face of the main body is constituted to be openable and closable. A locking means is provided to fit and fix the other side wall of the main body and the cover with each other, wherein the thickness of the cover is even. A cross-sectional shape in a width direction which intersects at right angles in a length direction is formed into a circular arc or a gradual angle protruding outward, and the external load is applied to the central protruded end of the cover which is apart from the both side walls of the main body. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a protector for a wire harness, and in particular, is a protector for a floor harness that is routed in an automobile, and increases strength against an external load such as a passenger or luggage.

  2. Description of the Related Art Conventionally, a synthetic resin protector that accommodates a wire harness has been provided in order to regulate the path of a wire harness used for wiring of various electrical components mounted on an automobile or to protect the wire harness.

As a protector for this kind of wire harness, a protector shown in FIG. 5 of Japanese Patent Laid-Open No. 2006-74844 (Patent Document 1) is provided.
The protector includes a front body 1 and a lid 2 that house a corrugated tube 4 that penetrates the wire harness.
Thus, when the wire harness is externally covered with a corrugated tube, and the corrugated tube is inserted into the protector, the wire harness is doubled and external loads such as passengers and luggage are applied. It is possible to reliably protect the floor harness.

However, if the wire harness is passed through the corrugated tube and further passed through the protector to provide a double sheath, there is a problem that the number of parts increases and the number of work steps increases, resulting in high costs.
And in the protector shown in FIG. 5, since the protector main body 1 and the lid | cover 2 consist of injection molding products, respectively, it becomes expensive from the point of metal mold | die preparation cost.

From the viewpoint of manufacturing the protector at a low cost, an protector made of an extruded product is suitable when used in a straight portion such as a rocker portion of an automobile floor panel.
However, the protector attached to the locker portion is subjected to a load such as a person or a load, and thus the protector may be deformed or buckled. In that case, the wire harness is easily damaged, and it is difficult to return the wire harness to the original shape.

In order to increase the strength of the protector against the above problem, a means for increasing the section thickness by increasing the plate thickness of the protector can be considered.
However, since the cross-sectional shape in the longitudinal direction in the extrusion direction is constant due to the processing characteristics of extrusion molding, increasing the section modulus of the plate thickness to increase the plate thickness increases the weight of the protector and increases the material cost. There is also an increasing problem. Further, since the wire harness is accommodated inside the protector, it is not possible to reinforce the protector by forming ribs in the load loading direction on the inner surface of the lid.

JP 2006-74844 A

  The present invention has been made in view of the above problems, and it is an object to improve the strength against a load from the vertical direction with respect to the protector without increasing the cost and weight by devising the cross-sectional shape of the protector. Yes.

In order to solve the above problems, the present invention comprises a main body and a cover that are externally mounted on an automobile wire harness, and the cover is a protector disposed at a position to which an external load is applied,
The main body and the cover are made of a resin molded product integrally extruded,
The main body has a saddle shape having a concave cross section with a bottom wall and both side walls, the cover is connected to one side wall of the main body via a hinge portion, the upper surface opening of the main body can be opened and closed, and A locking means that is locked to the other side wall of the main body and the cover;
The cover has a uniform thickness, and the cross-sectional shape in the width direction orthogonal to the length direction is an arc shape or a gentle mountain shape protruding outward, and the center protrusion of the cover apart from both side walls of the main body. Provided is a protector for a wire harness, characterized in that an external load is applied to the end.

With the above configuration, when an external load is applied from the cover side of the wire harness protector, the cover has an arc shape or a gentle mountain shape. Since the load is applied to the protruding end, the vertical load applied to both side walls can be kept small, and the buckling load of the protector can be increased, so that buckling of the both side walls can be prevented. it can.
In addition, since the stress on the external load is increased by increasing the cover shape to an arc shape or a gentle mountain shape without increasing the cover thickness, the thickness of the cover made of the extruded product is reduced to the full length of the protector. It is possible to prevent an increase in the weight of the protector that occurs when the amount is increased over the range.

In addition, by making the cover arc-shaped or gently mountain-shaped, it is possible to follow the outer surface of the circular wire harness, so the capacity of the protector can be increased, and the protector can be downsized. Can do.
The radius of curvature of the central protruding end is preferably 10 mm to 40 mm, and particularly preferably 22 mm.

The bottom wall of the main body is provided with a post-working attachment hole for the vehicle body locking material at a required interval, and the vehicle body locking material to be attached to the attachment hole projects the vehicle body locking blade portion on both sides. It is preferable that the shaft portion is provided, and the shaft portion is located at a position facing the central projecting end of the cover.
With the above configuration, by providing the vehicle body locking material at a position facing the center protruding end of the cover, when an external load is applied to the center protruding end, the load is equally affected on both side walls of the main body, The load applied to the vehicle body locking material is also equally applied to the left and right, and it is possible to prevent an uneven load from acting on the vehicle body locking material.

Each connecting portion between the bottom wall of the main body and the base portion of the both side walls may have a rounded wall.
In general, the buckling load is influenced by the shapes of the upper and lower ends of a member to which a vertical load in the vertical direction is applied, and buckling often occurs at the root portion. Therefore, the section modulus can be increased and the buckling load can be increased by making the connecting portions of the bottom wall, which is the base portion of the both side walls of the main body, and the base portions of the both side walls thick.
The thick wall may be provided on both the inner side and the outer side of the protector at the base of both side walls, or may be provided only on the side where the external load to be applied is large and buckling is likely to occur.
The radius of curvature of the connecting portion is preferably 1 to 2 mm, particularly preferably 1.5 mm.

You may provide the reinforcement rib which protrudes outside in the base of the side wall of the said main body.
By providing the reinforcing rib, the side wall of the main body is reinforced, so that occurrence of buckling can be suppressed. The reinforcing ribs may be provided on both side walls, or may be provided only on the lower side wall where buckling is likely to occur when the bottom wall of the main body is inclined.

The protector of the present invention is suitably used when it is externally mounted on a floor harness and a floor carpet is laid on the upper surface of the cover.
In this way, when the protector is arranged on the top surface of the rocker portion on the side of the floor panel and directly covered with the floor carpet, the both sides of the main body can be applied even if an external load is applied to a person's foot or luggage. The wall can be prevented from buckling and damage to the floor harness can be prevented, and the shape of the floor can be maintained without deteriorating the aesthetics of the room.

  As described above, according to the present invention, when an external load is applied from the cover side of the wire harness protector, the cover has an arc shape or a gentle mountain shape. Since the load is applied to the center protruding end of the cover without being loaded, the vertical load applied to both side walls can be kept small, and the buckling load of the protector can be increased. Bending can be prevented. Furthermore, by making the cover arc-shaped or gently mountain-shaped, it is possible to follow the outer surface of the wire harness having a circular cross section, so that the capacity of the protector for the wire harness can be increased and the protector can be downsized. be able to.

  In general, the buckling load is affected by the shapes of the upper and lower ends of a member to which a vertical load is applied, and buckling often occurs at the root portion. Therefore, if each connection part of the bottom wall which is a base part of the both side walls of a main body and the base part of both side walls is made thick, a section modulus can be made high and buckling load can be enlarged. Moreover, since the side wall of the main body is reinforced by providing the reinforcing rib projecting to the outside at the base of the side wall of the main body, the occurrence of buckling can be suppressed.

  Further, when the wire harness protector is disposed on the upper surface of the rocker portion on the side of the floor panel and directly covered with the floor carpet, the main body even if an external load is applied by a person's foot or luggage. The both side walls of the floor can be prevented from buckling, and damage to the floor harness can be prevented, and the shape of the floor can be maintained, so that the indoor aesthetics are not impaired.

Embodiments of the present invention will be described with reference to the drawings.
1 to 4 show an embodiment of the present invention.
A wire harness protector 10 (hereinafter abbreviated as a protector 10) according to the present invention is a protector that is externally mounted on a wire harness as shown in FIGS. Ness FH and seat harness SH branched to the seat side and connected to the sheet electrical equipment are accommodated.

The protector 10 is disposed on the upper surface of a rocker portion 21 that extends in the vehicle front-rear direction and is attached to a side portion of the floor panel 20 of the automobile shown in FIG.
The upper wall 21a of the locker portion 21 is inclined downward toward the indoor side S1 of the automobile. A floor carpet 30 is laid on the upper surface of the cover 11 b of the protector 10. Therefore, the cover 11b of the protector 10 is subjected to an external load such as a person's foot or luggage.

As shown in FIG. 1B, the protector 10 includes a protector main body 11 that is a resin molded product including a bowl-shaped main body 11a having an upper surface opening and a cover 11b covering the upper surface opening of the main body 11a. Material 12.
The main body 11a of the protector main body 11 has both side walls 11a-1 and 11a-2 erected from both left and right ends of the bottom wall 11a-1, and the upper end of one side wall 11a-1 and the end edge of the cover 11b are thin hinge portions. 11b-2 is connected and integrally provided by extrusion. The plate thickness of the main body 11a and the cover 11b is uniform.

As shown in FIG. 2, the cover 11 b of the protector body 11 has a cross-sectional shape in the width direction orthogonal to the length direction of the protector 10 as an arc shape projecting upward, and a central projecting portion 11 b-4 of the arc An external load such as an occupant or luggage loaded on the cover 11b is applied.
The central protrusion 11b-4 of the cover 11b is positioned at the center away from the both side walls 11a-1 and 11a-2 of the main body 11a, and the load applied to the central protrusion 11b-4 is changed to the both side walls 11a-1. 11a-2 is less likely to be loaded.

The cover 11b is provided with a roof portion 11b-1 protruding to the side of the main body 11a in a state where the upper surface opening of the main body 11a is closed by the cover 11b, and a locking claw 11b- is provided near the base of the roof portion 11b-1. 3 is provided. The locking claw 11b-3 is inserted and locked in a locking groove 11a-3 provided near the tip of the side wall 11a-2 of the main body 11a.
Since the protector body 11 is an extruded product as described above, the roof portion 11b-1 and the locking claws 11b-3 of the cover 11b and the locking grooves 11a-3 of the side wall 11a-2 are in the length direction of the protector body. It is continuous.

The bottom wall 11a-4 of the main body 11a is inclined downward toward the indoor side S1 in order to follow the upper wall 21a of the rocker portion 21.
The connecting portions 11a-6 and 11a-7 between the bottom wall 11a-4 and the bases of the side walls 11a-1 and 11a-2 are made thick.
In addition, a reinforcing rib 11a-8 having a rectangular cross section that protrudes to the outside is provided at the base of the side wall 11a-2 that becomes the indoor side S1 when installed in an automobile, and is arranged along the upper wall 21a of the rocker portion 21. I am doing so.
Further, the connecting portion 11a-9 between the reinforcing rib 11a-8 and the base portion of the side wall 11a-2 is also thick with a rounded shape.
In the present embodiment, the radius of the connecting portions 11a-6, 11a-7, and 11a-9 has a radius of curvature of 1.5 mm.

  As shown in FIG. 4, the bottom wall 11a-4 of the main body 11a is provided with mounting holes 11a-5 of the vehicle body locking member 12 by post-processing with a required interval. The vehicle body locking member 12 is inserted and locked in each of the mounting holes 11a-5, and the vehicle body locking member 12 is attached at a predetermined interval in the length direction of the protector body 11.

  The vehicle body locking member 12 is provided with a locking portion 12d on the upper surface side of a flat bottom plate portion 12c. The locking portion 12d is inserted into a generally T-shaped mounting hole 11a-5 provided in the bottom wall 11a-4 of the main body 11a, and the length of the protector main body 11 (in FIG. 4, a T-shaped vertical arrow) It is slid and locked while pressing in the (B direction). A shaft portion 12e is provided on the lower surface side of the bottom plate portion 12c. With the vehicle body locking member 12 attached to the bottom wall 11a-4 of the main body 11a, the shaft portion 12e is disposed at a position facing the central protruding end 11b-4 of the cover 11b.

  The protector 10 having the above-described configuration places the bottom wall 11a-4 of the main body 11a along the upper surface of the rocker portion 21 of the automobile, and, as shown in FIG. 21 is inserted into a through hole 21a-1 provided in the upper wall 21a, and is locked and attached by a vehicle body locking blade portion 12a. In this state, the floor carpet 30 is laid on the upper surface of the cover 11b.

  As described above, the protector 10 is disposed on the upper surface of the rocker portion 21 and is located at the position where the floor carpet 30 is laid on the upper surface of the cover 11b, so that an external load such as an occupant or a luggage is applied. At that time, since the cover 11b has an arc shape or a gentle mountain shape, a load is directly applied to the central projecting portion 11b-4, and a load is directly applied to both side walls 11a-1 and 11a-2 of the main body 11a. Is not loaded. Therefore, the vertical load applied to both side walls 11a-1 and 11a-2 can be kept small.

  Furthermore, the connecting portions 11a-6 and 11a-7 between the bottom wall 11a-4, which is the base portion of the side walls 11a-1 and 11a-2, and the base portions of the side walls 11a-1 and 11a-2 are made thick. Further, a reinforcing rib 11a-8 projecting to the outside is provided at the base of the side wall 11a-2, and the connecting portion 11a-9 between the reinforcing rib 11a-8 and the side wall 11a-2 is thick, and the side walls 11a-1, 11a. Since the base of −2 is reinforced, the occurrence of buckling can be prevented.

  In addition, since the cover 11b protrudes in an arc shape or a gentle mountain shape, the cover 11b can be fitted along the outer surface of the floor harness FH having a circular cross section, thereby increasing the accommodation rate of the wire harness of the protector body 11 and removing the protector. It can be downsized.

  Thus, in the protector body 11 to be extruded, without increasing the thickness of the cover 11b, the shape of the protector body 11 is an arc shape or a gentle mountain shape, so that even if an external load is applied to the side wall of the protector body. A structure that does not cause buckling can be obtained. Therefore, it is possible to provide a protector with high strength against an external load without causing an increase in weight that occurs when the cover is reinforced by increasing the plate thickness.

(A) is a schematic perspective view which shows the protector for wire harnesses, (B) is AA sectional drawing. It is sectional drawing which shows the latching state of a cover and a main body. It is a schematic sectional drawing which shows the state which fixed the protector for wire harnesses of this embodiment to the rocker part of a motor vehicle. It is a figure which shows the state which inserts the latching | locking part of a clamp in the through-hole provided in the bottom wall of a protector main body, and slides and latches. (A) (B) It is a figure which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Wire harness protector 11 Protector main body 11a Main body 11a-1, 11a-2 Side wall 11a-5 Mounting hole 11a-6, 11a-7, 11a-9 Connection part 11a-8 Reinforcement rib 11b Cover 11b-2 Hinge part 11b- 4 Center protruding end 12 Car body locking material 12a Car body locking blade 12e Shaft 20 Floor panel 21 Rocker 30 Floor carpet FH Floor harness

Claims (5)

It consists of a body and a cover that are externally mounted on an automobile wire harness, and the cover is a protector that is disposed at a position where an external load is applied,
The main body and the cover are made of a resin molded product integrally extruded,
The main body has a saddle shape having a concave cross section with a bottom wall and both side walls, the cover is connected to one side wall of the main body via a hinge portion, the upper surface opening of the main body can be opened and closed, and A locking means that is locked to the other side wall of the main body and the cover;
The cover has a uniform thickness, and the cross-sectional shape in the width direction orthogonal to the length direction is an arc shape or a gentle mountain shape protruding outward, and the center protrusion of the cover apart from both side walls of the main body. A protector for a wire harness, characterized in that an external load is applied to the end.   The bottom wall of the main body is provided with a post-working attachment hole for the vehicle body locking material at a required interval, and the vehicle body locking material to be attached to the attachment hole projects the vehicle body locking blade portion on both sides. The wire harness protector according to claim 1, further comprising a shaft portion provided, the shaft portion being positioned at a position facing the center protruding end of the cover.   The protector for a wire harness according to claim 1 or 2, wherein each connecting portion between the bottom wall of the main body and the base portions of the both side walls has a rounded wall.   The protector for wire harnesses of any one of Claim 1 thru | or 3 which has provided the reinforcement rib which protrudes outside in the base of the side wall of the said main body.   The wire harness protector according to any one of claims 1 to 4, wherein the wire harness is a floor harness, and a floor carpet is laid on an upper surface of the cover.

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