JP2598388Y2 - Heat shrink jig for heat shrink tube fitted with electric wire - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-shrinkable jig for a heat-shrinkable tube fitted in an electric wire, which is used to heat-shrink a heat-shrinkable tube fitted to an electric wire so that the heat-shrinkable tube adheres to the outer periphery of the electric wire.

[0002]

2. Description of the Related Art As a heat shrinking device for a heat shrinkable tube fitted to an electric wire, there is a known example disclosed in Japanese Patent Publication No. 2-15988. Is a mass-production processing apparatus in which the electric wire is sandwiched between cylindrical rotating members to revolve and rotate in a heating space, and the heat-shrinkable tube is heat-shrinked sequentially and continuously. On the other hand, in the case of heat shrinkage processing of a fractional electric wire fitted with a heat shrink tube, in front of a hot air nozzle cylinder of a general-purpose hot air dryer, apply hot air while holding and rotating the wires one by one by hand, A manual shrinkage method of heating and shrinking is employed.

[0003]

The above conventional heat shrinking means has the following disadvantages. In other words, in the case of a device in which the wire to be heated and shrunk is sandwiched between the above-mentioned cylindrical rotating members and revolved on its own axis, the heat shrinkable wire is suitable for mass production processing, but the heat shrinkable wire is fitted to a separately separated single wire. Limited to tube processing. Therefore, in the case of a flat electric wire in which electric wires are arranged side by side in a flat plate shape and integrated into a heat-shrinkable tube in which the ends of the electric wires are crotched and fitted to individual electric wires, the cylindrical rotation Since a flat electric wire cannot be attached to the member, heat shrinkage processing is not possible.
The structure becomes complicated and the cost increases.

On the other hand, in the case of the above-mentioned manual processing, since the hand cannot be positioned at the hot air jetting portion of the hot air nozzle cylinder, it is necessary to maintain a position slightly away from the hot air jetting portion. When the electric wire is held with one hand, the held electric wire shakes due to the hot air blown out and the heat shrinkage is not uniform, so that it is necessary to hold both hands, and workability and work efficiency are poor.
Furthermore, when the hot air blows out of the hot air nozzle cylinder, it diffuses in all directions, so the amount that effectively hits the heat shrink tube is small,
It takes time until the required heat shrinkage, the work interval becomes longer, and the holding posture of the heat shrinkable tube held by hand and the rotation operation of the tube vary depending on the operator, so the quality of tube shrinkage varies, There is a defect that defective products are produced.

The present invention solves the above-mentioned disadvantages of the prior art, and provides a heat shrinkable jig for a wire fitting heat shrinkable tube which can perform high quality heat shrinkage with good workability and can be processed even in the case of a flat wire. Is what you do.

[0006]

Means for Solving the Problems The heat shrink jig of the present invention which solves the above-mentioned technical problem is described as “a hot air drier is attached to an outer peripheral portion of a hot air nozzle tube and extends forward of the hot air nozzle tube. A guide holding plate is provided to oppose and form a hot air flow path in the opposing space, and further, at a tip end portion of the guide holding plate, the electric wire to be heated is received facing the hot air nozzle cylinder, and the pair of guide holdings is provided. A structure in which an electric wire holding portion having an electric wire holding concave portion located substantially in the middle between the plates is provided.

Then, one point of the electric wire in which the heat-shrinkable tube is fitted is inserted into the electric wire holding recess and supported, and the other end of the electric wire is picked up by hand and held at two points, so that the hot air from the hot air nozzle cylinder is applied to the electric wire. While being applied, the electric wire is slid to the left and right in the axial direction as appropriate to heat-shrink the heat-shrinkable tube. The electric wire holding concave portion is formed by a heat-defective conductor such as ceramics and heat-resistant resin in order to prevent the heat-shrinkable tube in contact with the heat-reducing concave portion from being heated to a high temperature and abnormally contracting the contacted heat-shrinkable tube to prevent overheating. Preferably, the width of the recess is narrow enough to support the electric wire.

[0008]

According to the heating and shrinking jig of the present invention, the heated electric wire is held at two points by the electric wire holding recess of the jig and the fingertip of the operator, and is positioned at the center of the hot air flow path and has a stable posture. Since it is held, it is possible to undergo uniform heat shrinkage processing without causing shaking or swinging due to hot air. And
The heat shrinking work only needs to be performed by one hand of the worker, and the work becomes easier than the conventional manual processing.

The hot air blown to the electric wire is substantially prevented from diffusing in four directions due to the presence of the pair of guide holding plates, and the effective air flow hitting the electric wire is increased. Even in such a case, the electric wire in which the heat-shrinkable tube is fitted by splitting the crotch may be sequentially inserted into the electric wire holding concave portion and held with one hand, so that the heat-shrinking process can be efficiently performed similarly to the case of the single electric wire. Furthermore, the heat shrink jig of the present invention can be used by simplifying the structure and attaching the mounting portion to the hot air nozzle cylinder, so that a dedicated hot air dryer is not required and a general-purpose hot air dryer can be utilized.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention. That is, the heating shrinkage jig 1 of the present invention is
The support arm 5 has a ring-shaped attachment portion 4 detachably fitted to the hot-air nozzle tube 3 of the general-purpose hot-air dryer 2, and has a support arm 5 projecting in parallel from the outer periphery of the attachment portion 4. A pair of guide holding plates 6A and 6B having a rectangular shape are provided. When the mounting portion 4 is attached to the hot air nozzle tube 3, the guide holding plates 6A and 6B have upper ends of the nozzle openings 12 of the hot air nozzle tube 3. The inner side is located at the lower end and faces squarely, and is slightly forward (in front of the hot air nozzle cylinder 3) (about 40 mm in this embodiment).
It has a shape that extends and the opposing space becomes the hot air flow path 7.

At the side edges of the leading end portions of the guide holding plates 6A and 6B, a plate-shaped wire holding portion 9 for connecting the side edges is provided. 6A and 6B, the nozzle port 12
Is formed. Note that the guide holding plates 6A and 6B and the wire holding portion 9 of this embodiment are made of heat-resistant resin of a poorly-heated conductor, and the wire holding recess 8 receives and holds the wire 11 fitted with the heat-shrinkable tube 10. The small recess is formed to be thin enough.

In the above-mentioned heating shrink jig, one point of the electric wire 11 is inserted into the electric wire holding concave portion 8, and the other point is pinched by the fingertip. The electric wire 11 is held in the heating position by holding the two points. While being sprayed, the slide is moved in the axial direction of the arrow as shown in the drawing to uniformly heat and shrink the entire length of the heat-shrinkable tube 10 for processing. The above-described embodiment has the above-described function, and the heat-shrinkable tube 1 is operated by one hand.
High-quality heat shrink processing in which 0 is uniformly heat shrunk can be efficiently performed.

The heat shrinkage jig 1 of the present invention is not limited to the above embodiment, but has the following changes. That is, referring to FIG. 2, which illustrates a main part of another embodiment of the present invention, the guide holding plates 6A and 6B have a curved surface forming a concave surface on the side of the hot air flow path 7 and a guide holding plate for holding the wire holding portion 9. From one of the plates 6A, 6B, or from the guide holding plates 6A, 6B.
There is a change such as providing a windbreak plate 13 for closing the front end portion of the wire, or providing a pair of wire holding portions 9 on both side edges of the guide holding plates 6A and 6B (not shown).

[0014]

As described above, the heat-shrinkable jig of the heat-shrinkable tube-fitted electric wire of the present invention can perform uniform heat-shrinkage processing by short-time heating by one-handed work by holding the electric wire with one hand. This has the effect of improving the quality of the heat-shrinkable tube-fitted electric wire and improving the workability and work efficiency of the heat-shrinkage processing. Furthermore, the heat shrinking process is possible even for flat electric wires in parallel with the electric wire group, there is no restriction on the processed electric wires, and it is characterized by a simple structure utilizing a general-purpose hot air dryer. There are practical advantages that can be used easily.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a heat-shrinkable jig of a heat-shrinkable tube fitted with an electric wire according to an embodiment of the present invention, wherein (A) in the figure is an overall perspective view, and (B) in the figure is a perspective view in a used state.

FIG. 2 is a perspective view of a main part of a heat-shrinkable jig of a heat-shrinkable tube fitted with an electric wire according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat shrink jig 2 Hot air drier 3 Hot air nozzle cylinder 4 Attachment part 5 Support arm 6A / 6B Guide holding plate 7 Hot air flow path 8 Wire holding recess 9 Wire holding part 10 Heat shrink tube 11 Wire 12 Nozzle mouth

Claims (1)

(57) [Scope of request for utility model registration] Claims: 1. A hot-air dryer, which is attached to an outer periphery of a hot-air nozzle cylinder and extends in front of the hot-air nozzle cylinder to face the same.
And, a guide holding plate that forms a hot air flow path in the opposed space is provided, and further, at the tip end portion of the guide holding plate, the heated wire is received facing the hot air nozzle cylinder, and between the pair of guide holding plates. A heat-shrinkable jig for a heat-shrinkable tube fitted with an electric wire, wherein the jig has a structure provided with an electric wire holding portion having an electric wire holding concave portion located substantially in the middle.