JPH103826A - Manufacture of vehicle lighting fixture cord, and structure of the manufacturing die and of vehicle lighting fixture cord - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle lighting fixture cord with its superior reliability on water resistance and bundling by forming insertion through work of bushing or vinyl tube insertion through work for a code bundle implemented manually conventionally or vinyl tape winding work or the like by integrally molding a soft resin material. SOLUTION: One side of a cord bundle 2 constituted by connecting a connector on one end side and sockets 3, 3 on the other end side is bundled, plural cords 2a, 2a,... on the other side are flatly arranged and set on a die, a resin material is injected on the outer circumference of continuous migration parts of both parties, a bushing 5 is integrally molded for the cord bundle 2, and a bundling cylinder 6 that also serves as an insulator for coating an earth wire winding part at a specified site of the cord bundle 2 is molded simultaneously.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for forming a bushing to be attached to a cord bundle to be passed through a through hole formed in a partition partitioning the interior and exterior of a vehicle and for binding the cord bundle, and in particular, for bushing and binding the cord bundle. The present invention relates to a method of manufacturing by integrally insert-molding a cylinder, a mold used for the insert molding, and a structure of a manufactured vehicle lighting cord.

[0002]

2. Description of the Related Art Conventionally, a cord bundle composed of a plurality of cords for a lamp or the like to be wired inside and outside a vehicle has been described.
As shown in FIG. 13, a waterproof bushing 52 fitted in a through hole 51 formed in a partition wall 50 that partitions the interior and exterior of the vehicle.
The code bundle 53 is wired via the. In the bushing 52, an insertion hole 54 for inserting the cord bundle 53 is formed at the center, and cylindrical bodies 55, 55 are formed on the inner and outer surfaces of the bushing 52 surrounding the insertion hole 54 so as to protrude. 53 is connected to these cylindrical bodies 55, 55 and the insertion holes 5.
4 and pass through the bushing 52.

The above-mentioned cord bundle 53 inserted into the bushing 52 is connected or bound at a predetermined portion such as the vicinity of the tubular members 55, 55, and a vinyl tape 56, 56 is attached to the portion. The structure was such that it was wound around a double or triple winding while being wrapped and fixed. In particular, at a portion where the cord bundle 53 is wired outside the vehicle (the portion viewed in the direction of the arrow A), rainwater or the like does not enter the room from outside through the gap of the cord bundle 53 inserted into the bushing 52. As described above, the vinyl tape 56 is wound over a predetermined length, and the end portion on the bushing 52 side is covered up to a portion covering the outer periphery of the tubular body 55, and the bushing 52 is fixed to the cord bundle 53. Insertion hole 5 of bushing 52 from opening of cylindrical body 55
The structure is such that water is prevented from entering the room via 4.

[0004]

However, according to the above bushing structure, the operation of inserting the cord bundle 53 into the bushing 52, the binding of the cord bundle 53, and the fixing of the bushing 52 to the cord bundle 53 are performed. All the winding work of the vinyl tapes 56 and 56 must be performed manually, which increases not only the number of assembling steps but also the movement of parts in each step of the assembling work, and the bushing for the cord bundle 53. 52, which hinders the mechanization of the assembling work. In addition, since the winding operation of the vinyl tape 56 is performed manually,
Even if the vinyl tape 56 is firmly wound around the outer circumference of the cord bundle 53, a gap is formed between the cords, and the winding method is varied, so that the reliability of the waterproof effect is inferior.
The bushing 52 is fixed to the vinyl tape 5 only.
6, the bushing 52 separates from the cord bundle 53 during use, causing problems such as flooding from the portion. Was.

The present invention has been made in view of the above-described problems, and has been made by using a soft material such as a bushing operation, a vinyl tape winding operation, or a tube insertion operation for cords which have been conventionally performed manually. The present invention relates to a method of forming a bushing and a method of bundling a cord bundle which are excellent in waterproofness and bundling by automatically forming a resin material by integral molding. In particular, a cord bundle is integrally insert-molded into a bushing and a bundling tube. It is an object of the present invention to provide a method for performing the method, a mold used for the insert molding, and a molded vehicle lamp cord.

[0006]

In order to achieve the above object, a method of manufacturing a vehicle cord according to the present invention comprises a cord bundle comprising a plurality of cords having a connector connected to one end and a socket connected to the other end. After the cord bundle is set along the cord bundle arrangement portion of the mold, a soft material is simultaneously injected into a predetermined portion of the cord bundle to integrally mold and fix the bushing and the binding tube. The gist is to do. Further, the one binding tube can be integrally formed with the ground connection portion for one cord forming the cord bundle.

A manufacturing die used in the method of manufacturing a vehicular lamp cord includes a cord bundle disposing portion, and a bushing cavity and a binding tube cavity formed at appropriate intervals along the cord bundle disposing portion. It consists of In this mold, at the end of the binding tube cavity,
It consists of a receiving jig having a burr cut portion continuous to the left and right of the cord relief portion cut out upward, and a pressing jig having a burr cut portion continuous to the left and right of the cord relief portion also cut notch downward. A binding jig can be configured.

The vehicular lamp cord manufactured by the above-described manufacturing method has a structure in which a cord bundle is insert-molded into a bushing and a binding tube which are simultaneously formed of the same material. Further, in this vehicle lamp cord, a binding tube is formed integrally with a ground connection portion in the cord bundle.

According to such a method of manufacturing a vehicular lamp cord, molding of a bushing, insertion and fixing of a cord bundle into the bushing, binding of a cord bundle, and the like can be performed by one-step mechanical automatic processing. Rather, it is possible to construct a bushing with excellent waterproof reliability for the insert portion of the cord bundle with respect to the bushing and the partition wall of the vehicle, thereby improving workability and reducing costs in manufacturing the vehicle lamp cord. it can. In addition, since the ground connection portion is completely covered with the resin material at the same time as the binding of the cord bundle, the subsequent handling of the vehicle lighting cord becomes easy, and the electrical safety is improved, and the vehicle lighting fixture is improved. The waterproofness of the bushing mounting portion of the cord can be made perfect.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a vehicular lamp cord according to the present invention. (Structure of Vehicle Lamp Cord Bundle) FIG. 1 is a plan view showing the structure of a vehicle lamp cord 1 according to the present invention. The vehicular lamp cord 1 shown in the embodiment of the present invention is to be wired inside and outside the vehicle through a through hole (not shown) formed in a partition wall of the vehicle. One or two or more sockets 3, 3 corresponding to the number of lamp chambers (not shown) of a lamp are provided at one end side of the cord bundle 2 constituting
On the other end side, a connector 4 for connecting to a power supply formed in the cabin of the vehicle is fixed, and a bushing 5 made of a soft resin material is formed on a predetermined portion of the cord bundle 2 by an integral molding method. Are fixedly formed in a structure so that the can be inserted. The bushing 5 seals the through-hole by being fitted into a through-hole formed in a partition wall of the vehicle, and has a waterproof effect on the interior of the vehicle.
At predetermined portions of the cord bundle 2 (in the embodiment of the present invention, two locations at the ends of the cord bundle on both sides of the bushing 5), binding tubes 6 and 6 for further binding the cord bundle 2 are provided. Are integrally formed of the same soft resin material as the bushing 5. In the present invention, the binding tubes 6 and 6 have a structure that covers the ground connection portion 7 in the cord bundle 2, and a structure that electrically insulates the portion at the same time as the binding of the cord bundle 2. I have.

(Manufacturing method of vehicle lamp cord) In the vehicle lamp cord 1 according to the present invention, the cord bundle 2 is formed into the bushing 5 and the binding tubes 6 and 6 at the same time as the bushing 5 is formed.
And it is manufactured by a method of inserting into the binding tubes 6 and 6. That is, the sockets 3 and 3 are fixed to one end and the connector 4 is fixed to the other end of the cord bundle 2 composed of a plurality of cords 2a, 2a,. The cord bundle 2 is set along a molding cavity 21 formed in a lower mold 20a surface of a mold 20 to be described later and a guide groove 22 bent substantially in a letter shape, and the upper mold 20b is lowered. The bushing 5 and one or two or more binding tubes 6 in a state where the soft resin material melted in the state is injected into the molding cavities 21 and 21 through the introduction path 23 and the cord bundle 2 is inserted into a predetermined portion. , 6 are integrally formed, and the molding of the bushing 5 and the insert processing of the cord bundle 2 and the binding processing (insulation treatment) at a predetermined portion of the cord bundle 2 are automatically and mechanically performed by a small number of work steps. Also to be implemented It is. At this time, the cord bundle 2 is configured to be pulled upward by the push rod 24 at the apex position of the guide groove 22 bent substantially in the shape of an arrow (a portion viewed in the direction of the arrow B), and the bushing 2 and the binding tube 6, The cord bundle 2 is designed not to be loosened during the molding of the cord 6.
It should be noted that the runner portion 8 (see FIG. 1) remaining in the introduction path 23 of the mold 20 after the molding is cut off to finish the product.

(Structure of insert molding die for cord bundle)
The mold 20 used in the embodiment of the present invention is constituted by a lower mold 20a and an upper mold 20b. As described above, a cavity 21 and a guide groove 22 are formed on the opposing surfaces of the two. It is. That is, as shown in FIG. 2, the cavity 21 formed in the lower mold 20a has a portion 21a for forming the bushing 5 and a portion 21b for forming the binding tubes 6 and 6, and the cavity 21a for forming the bushing 5 is formed. A binding jig 25 for binding the cord bundle 2 is provided on one side, and a juxtaposition jig 26 for laterally juxtaposing a plurality of cords 2a forming the cord bundle 2 on the other side. And a binding jig 25 for binding the cord bundle 2 to both ends of the cavity 21b for forming the binding tubes 6 and 6, and for cutting off the ends of the binding tubes 6 and 6 at the time of molding. , 25 are constituted.

The binding jig 25 includes a plurality of cords 2a,
2a is compressed to prevent the resin material from protruding from the binding portion. As shown in FIGS.
5a and a pressing jig 25b.
a is a cord relief portion 27a fixed to the lower mold 20a and cut out so as to expand upward at an opening angle of about 90 degrees;
It has burr cut portions 28a, 28a continuous to the left and right. The pressing jig 25b is fixed to the upper die 20b,
Notch so as to expand downward at an opening angle of about 90 degrees, a cord relief portion 27b corresponding to the cord relief portion 27a on the receiving jig 25a side, and burr cut portions 28b, 28b continuous to the left and right thereof. doing. Further, the cord bundle 2 inserted into the cord relief portions 27a and 27b in a state where the upper mold 20b is lowered and the burr cutting portions 28a and 28b of the receiving jig 25a and the pressing jig 25b are in contact with each other, It is configured to be pushed inward and held by the regulating groove 29a of the guide 29, and the cord bundle 2 can be compressed without crushing the cord. Therefore, both ends of the forming portion of the binding tubes 6 and 6 in the cord bundle 2 are
Are collected at the center of the forming portion of the binding tubes 6, 6, and after the resin material is poured, the cords 2a protrude from the side surfaces of the binding tubes 6, 6 and are formed. Never. In particular, with respect to the binding tube 6 covering the ground connection portion 7, the ground connection portion 7 does not protrude and the electrical processing is completed.

FIGS. 8 and 9 show another embodiment of the invention relating to the binding jig 25.
a, the cord relief portion 27a is cut out upward in an arc shape, and a corresponding pressing jig 25b is formed.
The cord relief portion 27b formed on the side is similarly cut out downward in an arc shape. Code escape part 2
It goes without saying that the shapes and sizes of the cords 7a and 27b can be appropriately changed according to the thickness of the cord bundle 2 and the binding conditions.

The receiving jig 25 shown in FIGS.
a and the pressing jig 25b show the structure of the inner surface of the cavity 21b for forming the binding tubes 6, 6, and the binding tubes 6, 6 are formed on the near side. In the above embodiments, the receiving jig 25a and the pressing jig 25b are, for convenience, the receiving jig 25a attached to the upper and lower dies 20a and the pressing jig attached to the upper die 20b. Jig 2
5b, and the pressing jig 25b shown in FIG.
And the receiving jig 25a shown in FIG. 6 can be changed to a structure in which they are mounted upside down.

As shown in FIG. 10, the juxtaposed jig 26 has a lower jig 26 formed with grooves 30, 30 for separating and holding the cords 2a, 2a,.
a and the cords 2a, 2a inserted into the grooves 30, 30...
Are formed by upper jigs 26b which are formed by forming convex pieces 31, 31... For pressing and holding from the upper part thereof, and have a structure fixed to the lower mold 20a and the upper mold 20b, respectively.

When the bushing 5 and the binding tubes 6 and 6 are formed by using the insert molding die for the cord bundle 2 as described above, the cord bundle 2 is moved into the respective cavities 21a and 21a during molding as shown in FIGS. .. Are firmly converged by the binding jigs 25, 25,...
), The soft resin material is injected to the outer periphery, so that the outer periphery of the cord bundle 2 is completely covered, and the waterproof property is improved.
Also, for the molded portion of the bushing 5 located outside the partition wall of the vehicle, the cord 2
In a state where a, 2a... are flat and at a predetermined interval (see FIG. 10), a soft resin material is injected around each of them, so that each cord 2a, 2a. And a complete waterproof effect can be obtained.

[0018]

As described above, the method for manufacturing the vehicle lamp cord according to the present invention, the mold for manufacturing the same, and the vehicle lamp cord are constructed as described above. The formed cord bundle can be insert-molded into the bushing or the binding tube, and the vehicle lamp cord can be manufactured automatically and mechanically. In addition, since there is no variation in products and the waterproofness is excellent, it is possible to improve workability and contribute to cost reduction.

[Brief description of the drawings]

FIG. 1 is a plan view of an essential part of a vehicular lamp cord according to the present invention, cut away.

FIG. 2 is a plan view showing the structure of a mold (lower mold) for insert-molding a cord bundle.

FIG. 3 is a front view showing a state in which the pressing jig is separated upward with respect to the receiving jig according to the structure of the binding jig.

FIG. 4 is a front view showing a state in which a pressing jig abuts on a receiving jig and binds a bundle of cords, similarly to the structure of the binding jig.

5 (a) is a front view showing the structure of the pressing jig. FIG.
(B) is a side view.

6 (a) is a front view showing the structure of the receiving jig. FIG.
(B) is a side view.

FIG. 7 is a perspective view showing a schematic configuration of the binding jig.

8A and 8B show another embodiment of the invention relating to the structure of the pressing jig, in which FIG. 8A is a front view and FIG. 8B is a side view.

FIGS. 9A and 9B show another embodiment of the invention relating to the structure of the receiving jig, wherein FIG. 9A is a front view and FIG. 9B is a side view.

FIG. 10 is a front view showing the configuration of the juxtaposition jig.

FIG. 11 is a front view of the bushing.

FIG. 12 is a plan sectional view of the same.

FIG. 13 is a plan view showing the structure of a conventional vehicular lamp cord.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 vehicle lamp cord 2 cord bundle 2a cord 3 socket 4 connector 5 bushing 6 binding tube 7 ground connection portion 8 runner portion 20 mold 20a lower mold 20b upper mold 21 cavity 21a bushing portion 21b binding tube portion 22 guide groove 23 introduction path Reference Signs List 24 push rod 25 binding jig 25a receiving jig 25b pressing jig 26 juxtaposed jig 27 cord relief section 28 burr cut section 29 guide 29a regulating groove 30 groove 31 convex piece

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Akihiro Tsuchiya 500 Kitawaki, Shimizu-shi, Shizuoka Prefecture Koito Manufacturing Co., Ltd. Shizuoka Plant

Claims (7)

[Claims] 1. A vehicular lamp cord having a cord bundle comprising a plurality of cords having a connector connected to one end and a socket connected to the other end, wherein the cord bundle is set along a cord bundle arrangement portion of a mold. Thereafter, a soft material is simultaneously injected into a predetermined portion of the cord bundle to integrally mold and fix the bushing and the binding tube, and a method of manufacturing a vehicular lamp cord. 2. The method for manufacturing a vehicular lamp cord according to claim 1, wherein one binding tube is integrally formed with a ground connection portion of the one cord forming the cord bundle. 3. The vehicular lamp cord according to claim 1, further comprising a cord bundle disposing portion, and a bushing cavity and a binding tube cavity formed at appropriate intervals along the cord bundle disposing portion. Manufacturing mold. 4. A bundling jig is provided at an end of the bundling tube cavity, the bundling tube cavity formed at an appropriate interval along the cord bundling portion. A mold for manufacturing a vehicular lamp cord. 5. A receiving jig having a burr cut portion continuous to the left and right of a cord relief portion in which a binding jig is cut upward,
5. A mold for manufacturing a vehicular lamp cord according to claim 4, comprising a pressing jig having a burr-cut portion which is continuous to the left and right of the cord relief portion also cut downward. . 6. A vehicular lamp cord in which a cord bundle is insert-molded into a bushing and a binding tube simultaneously molded of the same material. 7. The vehicular lamp cord according to claim 5, wherein a binding tube is formed integrally with the ground connection portion of the cord bundle.