JPH10174236A - Electric wire bending device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make everyone bend an electric wire into a prescribed bending shape exactly, promptly, easily, and completely by mounting the front end part of a hydraulic cylinder so as to turn in the circumferential direction inside a metal fitting and so as not to be drawn fore and aft. SOLUTION: A metal fitting 15 is provided with a fitting part whose cross section is of U shape against a hydraulic cylinder 4, where an insertion hole 17 for inserting the front end part of the hydraulic cylinder 4 is formed at a rear surface, and a storage recess 18 on the front end side of the hydraulic cylinder 4 is connected and formed into a stepped shape at its inside. The front end part side of the hydraulic cylinder 4 is inserted in the insertion hole 17 of the metal fitting 15 so as to turn and stored in the storage recess 18. A cylinder nut 19 is screwed in the front end part outer periphery of the hydraulic cylinder 4 for fitting. The outer periphery of the cylinder nut 19 is rotatably- brought into contact with the inner periphery of the storage recess 18 in the metal fitting 15. A setting ring 20 for preventing the hydraulic cylinder 4 from being drawn out is fitted in the inner periphery on the front opening part side of the storage recess 18. It is thus possible to bend an electric wire exactly, promptly, and completely.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire bending apparatus for bending an electric wire connecting a panel device such as a circuit breaker for wiring and a terminal into a predetermined shape so that the electric wire can be connected in accordance with the wiring path. When the worker performs the wire bending work, the direction in which the hydraulic hose of the hydraulic cylinder, which is the pressurizing source, extends out does not disturb the surrounding work environment, and is always in a comfortable posture and mechanically. In addition, the present invention relates to a wire bending apparatus capable of performing the work quickly, easily, and reliably.

[0002]

2. Description of the Related Art Conventionally, such wire bending work has been generally performed manually by hand. That is, the operator holds the both sides of the wire centered on the part where the electric wire is to be bent, places a support on the center of the bend, uses it as a lever, and applies force inward through both arms. It was bent in an arc shape. When the bent shape of the electric wire varies, the wire is hit with a hammer to correct it to a predetermined shape.

[0003]

However, in this case,
The wire bending work requires considerable experience, intuition, and physical strength, and cannot be easily performed by anyone. Since bending a thick electric wire requires considerable arm strength, when a large number of electric wires are bent at one time, an excessive force may be applied to the arm joints, which may cause pain. Also, since a considerable amount of strength is required by hand, even a considerably skilled worker has a limitation in the reproducibility of manufacturing an electric wire having a predetermined bent shape, and the bent shape varies, so it has to be corrected with a hammer. For this reason, the wires are twisted, and at the time of connection, the devices such as the circuit breakers for wiring are subjected to excessive force due to the twisting of the wires through the connection terminals, and the devices such as the molded circuit breakers for molding are damaged. There were inconveniences. In addition, there is a fear that the covering of the electric wire may be damaged during the straightening work by the hammer, and the insulation of the electric wire may be accelerated. Further, since the above-mentioned straightening work for preventing quality deterioration due to irregularities in the bent shape of the electric wire requires a considerable amount of time and labor, it is inefficient in terms of improving productivity, and the production time is delayed. There was also a problem that it led to an increase in cost. However, the problem is that the punch and the hydraulic cylinder
Can be solved by mechanically performing the wire bending operation using the hydraulic hose. In this case, however, the hydraulic hose is not provided due to the relation between the direction in which the hydraulic hose is led out from the hydraulic cylinder and the surrounding working environment. There is a problem that the work posture is unreasonable and the work is difficult.

Accordingly, the present invention has been made so that the direction in which the hydraulic hose is led out of the hydraulic cylinder can be appropriately and easily changed according to the situation of the surrounding working environment so that the work can be performed easily. It is an object of the present invention to provide a wire bending apparatus which is excellent in work efficiency by solving the problems of both manual work and mechanical work.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a holder and a pair of left and right parallel members arranged on the tip end side so as to be able to adjust the distance between them according to the diameter and bending shape of the electric wire. A pressurizing roller and a hydraulic cylinder having a punch attached to the front end thereof, which presses the electric wire supported on the rear side from the front side and bends the wire into a predetermined shape. The tip of the hydraulic cylinder is rotatable in the mounting bracket in the circumferential direction and cannot be pulled out in the front-rear direction with respect to the mounting bracket fixed to the base end side opposite to the holding roller. It is characterized by being mounted so as to be.

[0006] As means for attaching the punch to the hydraulic cylinder, there is provided an insertion hole formed in the punch so that the punch is detachably connected to a piston rod fixedly connected to the tip of the piston of the hydraulic cylinder. A piston rod may be used in which the distal end is loosely fitted and both are fixed with set screws. As a mounting means for the mounting bracket of the hydraulic cylinder, the hydraulic cylinder has a U-shaped cross section, and a hydraulic cylinder-receiving recess is formed in the rear surface of the hydraulic cylinder. The distal end of the hydraulic cylinder is rotatably passed through the through hole of the mounting bracket fixed to the base end side,
An outer peripheral surface of a cylinder nut fitted to an outer peripheral surface of a tip end portion of the hydraulic cylinder with a screw portion is rotatably fitted to an inner peripheral surface of the housing recess of the mounting bracket, and a front surface of the housing recess of the mounting bracket. Hydraulic cylinder on inner peripheral surface on opening side
In some cases, a stopper ring for preventing the pull-out is fitted.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the attached drawings.

FIG. 2 is a front view of the wire bending apparatus according to the present invention, FIG. 3 is a rear view, FIG. 4 is a bottom view, FIG.
Is a front central longitudinal sectional view. This device comprises a pair of holding rollers-2, 2 arranged in parallel on the left and right sides at the tip end side of the holder-1 so that the distance between them can be adjusted in accordance with the diameter and bending shape of the electric wire A described later. A hydraulic cylinder 4 having a punch 3 attached to the front end of the electric wire A whose rear side is supported and pressurized from the front side to bend into a predetermined shape is provided. A support plate 5 is provided above the tip side of the holder-1.
Are fixed with set screws 6, and a pair of holding rollers -2, 2 are rotatably arranged between the support plate 5 and the holder 1 by pins 7,7. 8a, 8
Reference numeral b denotes a pin insertion hole for adjusting the distance between the pair of holding rollers -2 and 2 according to the diameter of the electric wire and the shape of the wire (the radius of curvature).

[0009] The punch 3 has a front side curved in a semi-cylindrical shape corresponding to the bending shape of the electric wire A, and further has a front end face which is concavely curved inward in accordance with the shape of the electric wire A. An insertion hole 9 having a rear surface opened is formed inside the punch 3. A guide pin 10 protrudes from the lower surface of the punch 3.

In the hydraulic cylinder-4, a piston rod 12 is fitted and connected to the tip of a piston 11 by screwing. The connection between the punch 3 and the hydraulic cylinder 4 is performed by loosely fitting the distal end of a piston rod 12 having a groove for screwing formed on the outer peripheral surface thereof into an insertion hole 9 in the punch 3, and connecting the two to a set screw 13. And fix it so that it does not fall off. A hydraulic hose 14 for supplying pressure extends from the side surface of the hydraulic cylinder-4.

A mounting bracket 15 for mounting the hydraulic cylinder 4 is fixed to a base end side of the holder 1 opposite to the pressing rollers 2 and 2 with a set screw 16. The mounting bracket 15 has a U-shaped cross section at the mounting portion for the hydraulic cylinder-4, an insertion hole 17 for inserting the tip of the hydraulic cylinder-4 at the rear surface, and a hydraulic cylinder
4 The accommodation recesses 18 on the tip end side are connected to form a stepped shape. The distal end of the hydraulic cylinder 4 is rotatably inserted into the insertion hole 17 of the mounting bracket 15 and is accommodated in the accommodation recess 18. A nut 19 is screw-fitted, and the outer peripheral surface of the cylinder nut 19 is rotatably in contact with the inner peripheral surface of the housing recess 18 of the mounting bracket 15. A stop ring 20 for preventing the hydraulic cylinder 4 from being pulled out is fitted on the inner peripheral surface of the housing recess 18 on the front opening side.

At the center of the plate surface of the holder-1, a holding low
A guide groove 21 is formed between the lugs 2 and 2 and the mounting bracket 15, which guides and regulates the travel of the punch 3 through sliding contact with a guide pin 10 projecting from the lower surface of the punch 3. It is for.

When the wire bending operation is performed by this device, first, the pin insertion holes 8a and 8b are appropriately selected according to the diameter of the wire A and the shape of the bending, and a pair of holding rollers are formed.
2, 2 are set on the holder-1, and then, as shown in FIG.
Hold wire A so that it is located in the middle between two rollers.
It is arranged at the front of 2,2. And the hydraulic cylinder-4
The stroke is adjusted to a predetermined value corresponding to the diameter and the bent shape of the electric wire A, and the punch 3 is advanced to press the electric wire A. The punch 3 includes the guide groove 21 and the guide pin 10
The wire A is moved forward in a direction perpendicular to the center of bending of the wire A, presses on the wire A, moves forward by a predetermined stroke, and stops. When the bending moment exceeds a certain value, the wire A undergoes plastic deformation, and the wire A undergoes plastic deformation. The punch 3 starts to bend inward and is bent into a predetermined bent shape when the punch 3 stops running. A pair of holding rollers-2, 2 supporting the rear side of the electric wire A are provided with pins 7,
7 is a rotatable axis, so that the punch 3
There is no fear that the wire A will be damaged when pressurized by the pressure. Although the hydraulic cylinder 4 is rotatably connected to the mounting bracket 15, the mounting during the operation of the hydraulic cylinder 4 is performed due to the presence of the retaining ring 20, the cylinder nut 19, and the stepped wall on the rear surface of the mounting bracket 15. Extraction from the metal fitting 15 is reliably prevented.

Depending on the surrounding work environment, the hydraulic cylinder-4
If the presence of the hydraulic hose 14 extending from the side surface hinders the work, the set screw 13 for preventing the punch 3 and the piston rod 12 from falling off is loosened, and the mounting bracket 15 and the hydraulic cylinder-4 are removed. By rotating the holder 1 with the hydraulic cylinder 4 or the hydraulic cylinder 4 with the holder 1 at an appropriate angle such as 90 degrees through the rotatable connection with the The direction is changed so as not to hinder the work, and the set screw 13 is tightened to link and connect the punch 3 and the piston rod 12 to perform the work. Further, the punch 3 is detachable from the piston rod 12, and can be appropriately replaced with a wire having a different curved shape according to the diameter and the bent shape of the electric wire A.

The electric wire A to be bent is 600
V-vinyl cable (IV), 600V polyethylene cable (CV) (single core and three core) and the like are included.

[0016]

According to the present invention, the above-mentioned means are employed, so that not only the above-mentioned problems of the prior art can be solved but also the above-mentioned problem can be sufficiently solved, and the following specific effects can be obtained.

[0017] Since the wire bending operation is performed mechanically, no special experience, intuition or physical strength is required, and anyone can accurately, quickly, and quickly obtain a predetermined bending shape regardless of the wire diameter or bending shape.
It can be bent easily and reliably.

[0018] Therefore, the reproducibility of the bending process is good, and it is possible to reliably prevent quality deterioration due to irregularities in the bending shape of the electric wire.

Therefore, the need for a hammer to correct the variation in the bending shape eliminates the need for a correcting operation, and greatly reduces the working time required for the bending operation and simplifies the work, so that the working efficiency can be greatly improved. This can also contribute to a reduction in the product cost of the bent electric wire.

Further, since there is no need for a straightening operation using a hammer, there is no fear of damage to the wire coating due to the correction work, and there is no risk of insulation deterioration of the wire accompanying the damage.

Since there is no manual bending work and no correction work to correct the bending, there is no risk of twisting of the electric wires. The fear can be prevented.

[0022] Since the power is used for the wire bending operation and no arm strength is required, even when a large number of wires are bent at once, there is no risk of damaging the arm joint.

Since the holder and the hydraulic cylinder on which the pressurizing punch is mounted are rotatable by connecting means to the mounting bracket, it is possible to appropriately and easily change the lead-out position or direction of the hydraulic hose. Therefore, regardless of the working environment, the presence of the hydraulic hose does not hinder the work, and the wire bending work can be performed comfortably, easily, and surely in an easy posture at all times.

[Brief description of the drawings]

FIG. 1 is a front central longitudinal sectional view showing an example of the device of the present invention.

FIG. 2 is a front view.

FIG. 3 is a rear view.

FIG. 4 is a bottom view.

FIG. 5 is an explanatory view of use when viewed from a plane direction.

FIG. 6 is an explanatory view of use as viewed from the side.

FIG. 7 is a perspective view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Holder 2 Pressing roller 3 Punch 4 Hydraulic cylinder 5 Support plate 6 Set screw 7 Pin 8a Pin insertion hole 8b Pin insertion hole 9 Insertion hole 10 Guide pin 11 Piston 12 Piston rod 13 Set screw 14 Hydraulic hose 15 Mounting Bracket 16 Set Screw 17 Insertion Hole 18 Housing Recess 19 Cylinder Nut 20 Stop Ring 21 Guide Groove A Electric Wire

Claims (2)

[Claims] 1. A pair of holding rollers arranged side by side on the right and left sides of a holder so as to be capable of adjusting an interval between them in accordance with a diameter and a bending shape of an electric wire. A hydraulic cylinder having a punch attached to the distal end thereof, which presses the electric wire from the front side and bends it into a predetermined shape. The hydraulic cylinder is connected to the base end opposite to the holding roller of the holder. Characterized in that the distal end of the hydraulic cylinder is mounted so as to be rotatable in the circumferential direction and unable to be pulled out in the front-rear direction within the mounting bracket with respect to the mounting bracket fixed to the side. apparatus. 2. A means for attaching a punch to a hydraulic cylinder, wherein a piston is inserted into an insertion hole formed in the punch so that the punch is detachably connected to a piston rod fixedly connected to a tip end of a piston of the hydraulic cylinder. Use a rod with the tip part loosely fitted and both fixed with set screws. Also, as a mounting means to the mounting bracket of the hydraulic cylinder, the hydraulic cylinder has a U-shaped cross section and a hydraulic cylinder A cylinder housing recess is formed, and the mounting bracket fixed to the base end side opposite to the holding roller of the holder is rotatably penetrated through the insertion hole through the distal end side of the hydraulic cylinder. The outer peripheral surface of the cylinder nut fitted to the outer peripheral surface of the distal end portion of the hydraulic cylinder with a screw portion is rotatably fitted to the inner peripheral surface of the receiving recess of the mounting bracket. , The hydraulic cylinders on the front opening side inner peripheral surface of the accommodation recess of the mounting bracket - wire bending apparatus according to claim 1, characterized by using those occupies clothed fitting a stop ring for preventing extraction of.