JPH10649A - Bushing molding method and mold for vehicle lamp code and bushing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute an excellently reliable bushing and binding method automatically relative to water proofing and binding by forming flexible resin material through Integral molding in the insertion work of tubes for bushing, insertion work of vinyl tubes, vinyl tape winding work and the like implemented by conventional manual work with respect to a bundle of codes. SOLUTION: One side of a bundle 1 of codes consisting of one side connected with a connector 6 and another side connected with sockets 5 is bound, and a plurality of codes 1a, 1a... at another side are arranged flat and set on the mold, then resin material is infected onto the outer periphery at both the continuous migration parts so as to form a bushing 2 on the bundle 1 of codes integrally, and a bundling sleeve 7 is formed on a predetermined place of the bundle 1 of codes. The bushing 2 has a structure of an insert part to be wide planar at its one end and a binding part at its other side, and the tip end of the insert part is formed into arcuate form and the securing part is formed integrally at the side of the binding part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bushing to be attached to a cord bundle penetrating a through hole formed in a partition partitioning the interior and exterior of a vehicle, and a bundling technique of the cord bundle. The present invention relates to a method for integrally insert molding, a mold used for the insert molding, and a structure of a molded bushing.

[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. 15, 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, a portion where the cord bundle 53 is wired outside the vehicle has a predetermined length so that rainwater or the like does not enter the room from outside through the gap of the cord bundle 53 inserted into the bushing 52. The end of the bushing 52 is covered with a portion covering the outer periphery of the tubular body 55, and the bushing 52 is fixed to the cord bundle 53 so as to fix the tubular body 55.
Through the insertion hole 54 of the bushing 52 from the opening of the bushing 52 to prevent water from entering the room. Also,
The portion where the above connection was made and the vinyl tape 56 was wound was reinforced by covering the portion with a vinyl tube 57 or the like.

[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. Since all the winding operations of the vinyl tapes 56 and 56 must be performed manually, not only the number of assembling steps is increased, but also the movement of components in each step of the assembling operation is increased, and the bushing 52 for the cord bundle 53 is increased. Was a cause of obstructing the mechanization of assembly work. In addition, since the winding operation of the vinyl tape 56 is performed manually, even if the vinyl tape 56 is wound tightly around the outer periphery of the cord bundle 53, a gap is generated between the cords, and a variation occurs in the winding method. And the reliability of the waterproof effect is poor, and the cord bundle 53
The fixing of the bushing 52 to the
Therefore, there is a problem that reliability is lacking, for example, the adhesion is easily deteriorated during use.

The present invention has been made in view of the above-mentioned problems, and is intended to reduce the time required to insert a tube into a cord or the like by inserting a vinyl tube, winding a vinyl tape into a cord, or the like, which has been conventionally performed manually. The present invention relates to a bushing and bundling method having excellent reliability for waterproofing and bundling by automatically forming a soft resin material by integral molding. It is an object of the present invention to provide a mold used for insert molding and a structure of a molded bushing.

[0006]

In order to achieve the above object, according to the present invention, there is provided a method for insert-molding a cord bundle, which comprises connecting a connector to one end and a socket to the other end. Along with binding the sides, a plurality of other side cords are arranged flat and set on a mold, and a resin material is injected onto the outer periphery of a continuous transition portion of both to integrally mold the cord bundle and the bushing, The gist is that a binding portion is formed at a predetermined portion of the cord bundle.

In the molding die, a binding jig for binding a plurality of cords is arranged on one side of a cavity in which the cord bundle is arranged, and a juxtaposition jig for arranging a plurality of cords flat on the other side. Things.

The bundling jig includes a receiving jig having a burr cut portion continuous to the left and right of the cord relief portion cut upward, and a burr similar to the left and right of the cord relief portion also cut downward. A guide is provided which is constituted by a pressing jig having a cut portion, and which regulates the cord inserted into the cord escape portion in a state where the burr cut portion is in contact with the jig to be pressed and held inside the burr cut portion. You can also.

A bushing formed integrally with a bundle of cords by the above-described method for forming a vehicular lamp cord has a structure having a wide flat plate-shaped insert portion on one side and a binding portion on the other side. Have The insert portion has a tip formed in an arc shape, and a mounting portion is integrally formed on the binding portion side of the cord bundle.

[0010] Further, the wide flat plate-shaped insert portion is
The portion from the tip to the mounting portion of the bushing is formed so as to be gradually thicker, and the mounting portion of the bushing is formed on the binding portion side of the cord bundle.

According to such a method of forming a cord bundle,
Not only can the molding of the bushing, the insertion and fixing of the cord bundle into the bushing, the binding of the cord bundle and the like be performed by an automatic process in one step, but also the waterproof reliability of the insert portion of the cord bundle to the bushing and the partition wall of the vehicle can be improved. An excellent bushing can be formed, the workability of the vehicle lamp cord can be improved, and the cost can be reduced. In addition, since the mounting portion of the bushing is formed integrally with the binding portion of the cord bundle,
The insert portion has a structure independent of the mounting portion,
Not only elastic operation is enabled, but also a plurality of cords in the insert portion can be separated and insert-molded individually, so that the waterproofness of the insert portion can be enhanced. Further, since the insert portion is formed gradually thicker from the tip to the mounting portion side of the bushing, each cord forming the cord bundle does not protrude from the insert portion and is not formed.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a bushing molding method, a molding die and a structure of a bushing according to the present invention. (Example of Structure of Cord Bundle) FIG. 1 shows a state in which a bushing 2 made of a soft resin material is fixedly formed on the cord bundle 1 by an integral molding method, and the cord bundle 1 is simultaneously bound at a predetermined portion by the soft resin material. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic configuration explanatory view, in which a cord bundle 1 shown in an embodiment of the present invention is wired in and out of a room through a through hole 4 opened in a partition wall 3 of a vehicle, and a vehicle lamp is provided at one end thereof. And a connector 6 for connecting to a power supply in a vehicle cabin at the other end, and the bushing is fixed. 2
Is fitted into the through hole 4 of the partition wall 3 to seal the through hole 4 to increase the waterproofness. The sockets 5 and 5 and the connector 6 are sandwiched between the bushings 2.
A binding tube 7, 7 for binding the code bundle 1 is integrally formed at a predetermined portion of the code bundle 1 wired on the side.
In the embodiment of the present invention, for each of the cords 1a, 1a,. It has a structure to cover.

(Insert Molding Method of Cord Bundle) In the insert molding method of cord bundle according to the present invention, a plurality of cords 1a, 1a having a connector 6 connected to one end and sockets 5 and 5 connected to the other end in advance. Are set along a molding cavity 21 and a guide groove 22 formed in a lower mold 20a surface of a mold 20 described later, and a molten soft resin material is introduced with the upper mold 20b lowered. The cord bundle 1 is injected into each cavity 21 through the path 23 and
The bushing 2 and one or more bundling tubes 7 are integrally formed in a state in which the bushing 2 is inserted, so that the bushing 2 is formed and inserted, and the bundling process of the cord bundle 1 is automatically performed with a small number of work steps. Is what you do.

(Structure of Insert Mold) The mold 20 used in the embodiment of the present invention is composed of a lower mold 20a and an upper mold 20b. Cavity 21 and guide groove 2
2 are formed. That is, as shown in FIG.
a portion 21a for molding the bushing 2 and a portion 21b for molding the binding tube 7
A binding jig 24 for binding the cord bundle 1 is provided on one side of the cavity 21a for molding the bushing 2.
On the other side, a plurality of cords 1 forming a cord bundle 1
a, 1a... are arranged side by side, and the cord bundle 1 is bound to both ends of the cavity 21b for molding the binding tube 7, and the ends of the binding tube 7 are formed at the time of molding. Bundling jigs 24, 24 for deburring are configured.

As shown in FIGS. 3 to 7, the binding jig 24 includes a receiving jig 24a and a pressing jig 24b, and the receiving jig 24a is fixed to the lower mold 20a and substantially 90
A cord relief portion 26a cut out so as to expand upward at an opening angle of a degree, and a burr cut portion 27 continuous to the left and right thereof.
a, 27a. Further, the pressing jig 24b is fixed to the upper mold 20b, is cut out so as to expand downward at an opening angle of about 90 degrees, and has a cord relief portion 26b corresponding to the cord relief portion 26a on the receiving jig 24a side. , And burr cut portions 27b, 27b continuous to the left and right. The upper mold 20b is lowered, and the receiving jig 24a and the pressing jig 24 are moved.
In a state where the burr cut portions 27a and 27b abut on each other, the cord bundle 1 inserted into the cord relief portions 26a and 26b is pushed inward by the regulating groove 28a of the guide 28 and held. It is structured so that the code is not crushed. In the embodiment of the present invention, the receiving jig 24a and the pressing jig 24b are, for convenience, a jig mounted on the upper and lower molds 20a side as the receiving jig 24a and the upper mold 2a.
The jig to be mounted on the 0b side is a pressing jig 24b, and the receiving jig 24a shown in FIG. 5 and the pressing jig 24b shown in FIG. It is also possible to change to a structure that does.

FIGS. 8 and 9 show the binding jig 24.
This shows another embodiment of the present invention, in which a cord relief portion 26a formed in a receiving jig 24a is cut out upward in an arc shape and is formed on a corresponding pressing jig 24b side. The cord relief portion 26b is similarly cut out downward in an arc shape. Needless to say, the shape and size of the cord relief portions 26a and 26b can be appropriately changed according to the thickness of the cord bundle 1 and the binding conditions.

As shown in FIG. 10, the juxtaposition jig 25 is formed with a lower jig 25a formed with grooves 29, 29,... For separating and holding the cords 1a, 1a,.
, And the cords 1a, 1a ... inserted in the grooves 29, 29 ...
Are formed by upper jigs 25b formed by forming convex pieces 30, 30... 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.

(Bushing Structure) As shown in FIGS. 11 to 14, the bushing 2 formed by the method for insert-molding a cord bundle according to the present invention is mounted on the outer periphery of a mounting portion 2a formed in a so-called bell shape. A groove 2b is formed, and an insert portion 2c is formed so as to protrude from the center of the inner surface of the mounting portion 2a, and a binding portion 2d is formed so as to protrude from the center of the outer surface in the opposite direction.
The structure is inserted through d. The insert portion 2c formed integrally with the cord bundle 1 is formed in a wide flat plate shape (a portion viewed in the direction of arrow B) on one side thereof, and converges toward the inner surface of the mounting portion 2a.
a is continuous with the binding portion 2d formed on the outer surface of the portion a. By forming one side in the form of a wide flat plate in this way, a sufficient resin material is poured between the cords 1a, 1a... Forming the cord bundle 1 so that the spacing between the cords 1a, 1a. Therefore, the waterproofness of the molded portion can be further improved. In addition, since the attachment portion 2a is converged and continuous with the binding portion 2d, the operability of the portion with respect to the bushing 2 is improved, so that the set portion 2a is prevented from sagging and how the cord bundle 1 is formed. The bushing 2 side deforms to this direction even if it is oriented in any direction, and does not affect the mounting portion to the vehicle body. Further, the insert portion 2c formed into a wide flat plate shape in a plan view has one end formed in an arc shape (a portion viewed in the direction of arrow C).
It is formed so as to be gradually thicker from one end to the mounting portion 2c in a side view (D arrow portion). With such a shape, the cords which are insert-molded in a juxtaposed state are completely covered with a resin material having a predetermined interval, so that flooding from the tip of the insert portion 2c is completely prevented.
Further, since the insert portion 2c is formed with an appropriate thickness, the cord bundle 1 does not protrude from the resin material during molding, the elasticity at the joint portion is sufficiently ensured, and the insert portion 2c at the joint portion is formed. Setting can be prevented.

Mounting groove 2b formed on the outer periphery of mounting portion 2a
Is formed so that its groove wall gradually protrudes from the inner circumference to the outer circumference (in the direction of arrow E), and when the bushing 2 is fitted into the through hole 4 formed in the partition wall 3 of the vehicle, the groove is formed. The outer peripheral end of the wall is in pressure contact with the partition wall surface, so that the draining effect of the wall can be enhanced.

[0020]

As described above, the bushing molding method, the molding die and the bushing of the vehicular lamp cord according to the present invention are constituted as described above. Therefore, the bushing is formed, the cord bundle is inserted into and fixed to the bushing, and the cord bundle is bound. Not only can be carried out by one-step automatic processing, but also a bushing having excellent waterproof reliability with respect to the insert portion of the cord bundle with respect to the bushing and the partition wall of the vehicle can be constructed, and workability with respect to the vehicle lamp cord can be achieved. And cost can be reduced gradually. Further, since the mounting portion of the bushing is formed integrally with the binding portion side of the cord bundle, the insert portion has a structure independent of the mounting portion, which allows only elastic operation. In addition, since a plurality of cords in the insert portion can be separated and insert-molded individually, the waterproofness of the insert portion can be improved. In addition, since the insert portion is formed gradually thicker from the tip to the mounting portion side of the bushing, excellent effects such as that each cord forming the cord bundle does not protrude from the insert portion and is formed. It has an effect.

[Brief description of the drawings]

FIG. 1 is a plan view showing a configuration of a vehicular lamp cord according to the present invention.

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 of a juxtaposition jig for separating and holding the cord bundle.

FIG. 11 is a side view showing the structure of the bushing.

FIG. 12 is a plan view of the same.

FIG. 13 is a front view of the same.

FIG. 14 is a plan sectional view of the same.

FIG. 15 is a plan view showing the structure of a conventional vehicular lamp cord.

[Description of Signs] 1 Cord bundle 1a Cord 2 Bushing 2a Attachment portion 2b Attachment groove 2c Insert portion 2d Binding portion 3 Partition wall 4 Through hole 5 Socket 6 Connector 7 Binding tube 20 Die 20a Lower die 20b Upper die 21 Cavity 21a Bushing portion 21b Bundling tube part 22 Guide groove 23 Introducing path 24 Bundling jig 24a Receiving jig 24b Pushing jig 25 Side by side jig 26 Cord escape part 27 Deburring part 28 Guide 28a Control groove 29 Groove 30 Groove 30

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location H02G 3/22 H02G 3/22 C H05K 7/00 H05K 7/00 L // B29L 31:34 ( 72) Inventor Akihiro Tsuchiya 500 Kitawaki, Shimizu City, Shizuoka Prefecture Koito Manufacturing Co., Ltd.

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 one side of the cord bundle is bound and the other side is flat. A bushing molding method for a vehicle lamp cord in which a cord bundle and a bushing are integrally molded by injecting a resin material to the outer periphery of a continuous transition portion between the two and then setting them on a mold. 2. A binding jig for binding a plurality of cords on one side of a cavity in which a vehicle lighting cord is arranged, and a juxtaposition jig on a plurality of cords arranged flat on the other side. A bushing molding die for a vehicle lamp cord according to claim 1, wherein: 3. A receiving jig having a burr cut portion continuous to the left and right of the cord relief portion cut out upward, and a binding jig continuous to the left and right sides of the cord relief portion also cut downward. A guide having a pressing jig having a burr-cut portion, and a guide for restricting the cord inserted into the cord relief portion into the inside of the burr-cut portion in a state where both the burr cut portions are in contact with each other. 2. A bushing molding die for a vehicle lamp cord according to claim 1, wherein: 4. An insert portion integrally formed with a cord bundle is formed in a wide flat plate shape on one side thereof.
A bushing for a vehicular lamp cord comprising a binding portion converging on the other side. 5. A bushing for a vehicular lamp cord according to claim 4, wherein one end of said wide flat plate-shaped insert portion is formed in an arc shape. 6. The vehicle according to claim 4, wherein one side of the wide flat plate-shaped insert portion is formed so as to gradually become thicker from a tip end thereof to a mounting portion of the bushing. Bushing for lamp cord. 7. A bushing for a vehicular lamp cord according to claim 4, wherein the mounting portion is formed integrally with the binding portion of the cord bundle.