JP2006130550A - Bender for electric wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bender for an electric wire, which bends an electric wire without damaging the coat of the electric wire even though the whole structure of the bender is simplified, which stabilizes the dimension from a bent position to the front end position of the electric wire, and which further easily corresponds to the dimensional change of the electric wire. <P>SOLUTION: A pair of handles 1, 2 are pivotally connected to each other so as to be freely opened and closed. An introduction guide 3 is set on the handle 1. An bending guide 4 is set on the handle 2. The electric wire K is introduced along the introduction guide 3 and the bending guide 4 in an open state in which both handles 1, 2 are separated. The bender bends the introduced electric wire K by a bending operation, which brings both handles 1, 2 close to each other. The handle 1, to which the introduction guide 3 is set, is rotatably inserted into a pivot 5 for pivotally connecting the pair of handles 1, 2. The handle 2, to which the bending guide 4 is set, is fixed to the pivot 5. A columnar bending shoe 8, which is opposed to the bending guide 4 to hold the electric wire K, is formed by extending the pivot 5 in its axial center direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electric wire bender, and more specifically, it is possible to bend without damaging the electric wire coating while simplifying the overall configuration and being easy to use at the work site, and to stabilize the dimension of the electric wire tip position from the bending position. Furthermore, the present invention relates to a technique for easily dealing with a change in the diameter of the electric wire.

Conventionally, as shown in FIGS. 5 (a) and 5 (b), a pair of handles 1 and 2 are pivotally connected so as to be openable and closable, an introduction guide 3 ′ is provided on one handle 1, and bending is performed on the other handle 2. A pipe P, a tube or an electric wire introduced along the guide 3 ′ for introduction and the guide 4 ′ for bending in a state where the guides 4 ′ are provided and both the handles 1 and 2 are separated bring the handles 1 and 2 close to each other. In the bending A ′ bent by the bending operation, the bending guide 4 ′ is bent along the arcuate introduction guide 3 ′ by bringing the outer surface of the pipe P, tube or electric wire into sliding contact. It is. (For example, see Patent Document 1)
In the vendor A ′ shown in the above-mentioned Patent Document 1, the bending guide 4 ′ rubs the coating of the pipe P, tube or electric wire with a strong force corresponding to the bending force. For example, when bending the electric wire, the electric wire coating is applied. There is a fatal problem of damage.

  Further, in the vendor A ′ shown in the above-mentioned Patent Document 1, the introduction guide 3 ′ is formed in an arc shape with the stationary shoe as a stationary shoe, an arc-shaped groove is formed, and a groove is formed in the bending guide 4 ′. Furthermore, there is a problem that the overall structure becomes complicated because a stopper S or the like for holding the pipe P, the tube or the electric wire to prevent them from being fed out is required.

  In addition, when the diameter of the pipe P, tube, or electric wire to be bent is changed, it cannot be dealt with, and a large number of vendors A 'corresponding to various diameters are required.

By the way, in the wiring in the switchboard shown in FIG. 4, when a three-phase electric wire K is wired between the devices 9 and 10 (for example, a star delta wiring for starting a high-power motor), Like the CV line Ka, the core wire a is coated on the polyester intermediate coating b and further coated with the outer coating c, and a thick electric wire K that is hard and heat-resistant and requires a considerable force to bend is used. In the situation where the attachment is already finished and the dimensions of the connection between the devices 9 and 10 are determined, the bending angle of the wire K, in particular, the lead from the wire horizontal portion Kb to the terminals 9a and 10a of the devices 9 and 10 When the dimension X is precisely required and the lead dimension X is not uniform, when the three-phase three wires K are bound by the band B, the terminals 9a and 10a of the devices 9 and 10 are connected. The wiring site may break Is, it takes the care and great effort, it is those that are struggling.
Japanese Patent Laid-Open No. 11-226654

  The present invention was invented in view of the above-described conventional problems, and can be bent without damaging the wire coating while simplifying the overall configuration, and stabilizes the dimensions of the wire tip position from the bending position. Furthermore, an object of the present invention is to provide an electric wire vendor that can easily cope with a change in the diameter of the electric wire.

  According to the first aspect of the present invention, the pair of handles 1 and 2 are pivotally connected so as to be openable and closable, the introduction guide 3 is provided on one handle 1, the bending guide 4 is provided on the other handle 2, and both handles 1 An electric wire bender in which the electric wire K introduced along the introduction guide 3 and the bending guide 4 in the open state in which the two are separated from each other is bent by a bending operation in which both the handles 1 and 2 are brought close to each other. One handle 1 provided with the introduction guide 3 is rotatable with respect to the pivot 5 for pivotally connecting the two, and the other handle 2 provided with the bending guide 4 is fixed to the pivot 5. A column-shaped bending shoe 8 that extends in the axial direction and faces the bending guide 4 to sandwich the electric wire K is formed.

According to such a configuration, the pivot 5 is moved during the bending operation in which the handle 1 provided with the introduction guide 3 is a fixed side and the handle 2 provided with the bending guide 4 is a movable side so that both the handles 1 and 2 are brought close to each other. Since the pivot 5 is fixed to the movable handle 2, the pivot 5 rotates with respect to the fixed handle 1 together with the movable handle 2 and the bending guide 4, and therefore the bending shoe extending from the pivot 5. The bending guide 3 does not rotate with respect to 8, and the bending operation is performed while the electric wire K is held between the bending shoe 8 and the bending guide 4, and the electric wire K is fixed to the introduction guide on the fixed side. 3 can be bent so as to be slid without being constrained to 3, and can be favorably bent without rubbing the coating of the electric wire K and without scratching the coating.
Moreover, since the electric wire K is sandwiched and bent by the bending guide 4 and the bending shoe 8, the holding position of the electric wire K is not displaced, and therefore the distance from the holding position to the tip of the electric wire K is constant. The electric wire K can be bent, and even the hard electric wire K with high heat resistance can be bent with uniform dimensions, and the wiring between the devices 9 and 10 attached to the switchboard can be easily and orderly. In fact, when correcting the uneven bending dimensions, the terminals 9a and 10a of the devices 9 and 10 are not unexpectedly broken.
Furthermore, in the configuration of the wire bender A, the pivot 5 that pivotally connects the pair of handles 1 and 2 is fixed to the handle 2 on the movable side, and the pivot 5 is extended to form a cylindrical bending shoe 8. The pivot 5 and the bending shoe 8 can be used in combination, so that a simple configuration can be achieved, and the weight and size can be reduced, and it is easy to use and the field work is facilitated.

  According to the second aspect of the present invention, the scale 2 is formed in the handle 2 having the bending shoe 8 so that the position sandwiched between the bending shoe 8 and the bending guide 4 is the zero position. It is what.

  According to such a configuration, by using the dimensional scale 6, the dimension from the bending position to the tip of the electric wire K can be set to a desired dimension, and the bending dimension is corrected more neatly when wiring between the devices 9 and 10. There is no need to break the terminals 9a and 10a of the devices 9 and 10 when the dimensions are corrected.

  According to invention of Claim 3, the stopper 7 which the front-end | tip of the electric wire K contact | abuts is provided so that the movement along the dimension scale 6 is possible.

  According to such a configuration, by using the movable stopper 7, various dimensions from the bending position to the tip of the electric wire K can be accurately obtained.

  According to the invention of claim 4, the position of the bending guide 4 with respect to the bending shoe 8 is configured to be changeable according to the diameter of the electric wire K.

  According to such a configuration, by changing the distance of the bending guide 4 with respect to the bending shoe 8, it is possible to easily cope with a change in specification in which the diameter of the electric wire K to be bent changes.

  In short, the present invention can be bent without damaging the wire coating while simplifying the overall configuration, and stabilizes the dimension of the wire tip position from the bending position, facilitating on-site bending work and wiring work. .

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  FIG. 1A shows an open state, FIG. 1B is a perspective view showing a bending operation, FIG. 2A is a partial front sectional view, and FIG. 1B is a partial side sectional view.

  The electric wire bender A is pivotally connected to a pair of handles 1 and 2 by a pivot 5 so as to be openable and closable, an introduction guide 3 is provided on one handle 1, a bending guide 4 is provided on the other handle 2, and both handles are provided. The wire K introduced along the guide 3 for introduction and the guide 4 for bending is bent by a bending operation in which both handles 1 and 2 are brought close to each other in an open state in which 1 and 2 are separated so as to cross at a substantially right angle. is there. In this case, one handle 1 provided with the introduction guide 3 is held on the fixed side, for example, with the left hand, and the other handle 2 provided with the bending guide 4 is set on the movable side, for example, with the right hand.

  In such an electric wire bender A, the present invention can be bent without damaging the electric wire coating while simplifying the entire configuration, stabilizes the dimension of the electric wire tip position from the bending position, and further reduces the electric wire diameter. This makes it easy to deal with changes. Details will be described below.

  As shown in FIGS. 1 and 2 (a), base plates 11 and 12 are attached to a pair of handles 1 and 2, respectively, and both base plates 11 and 12 are pivotally connected to each other by a pivot 5. 2 are connected so that opening and closing is possible. As shown in FIG. 1A, an introduction guide 3 having an L-shaped cross section is attached to the base plate 11 of one handle 1, and a bending guide 4 having an L-shaped cross section is attached to the base plate 12 of the other handle 2. In addition, in the open state where both the handles 1 and 2 are opened at approximately 90 degrees, the flat guide 3 for guide and the guide 4 for bending are substantially flush with each other, and the electric wire K can be stably moved along the guides 3 and 4. It can be introduced. In this case, for example, the electric wire bender A is further improved by obtaining the fully open state of the handles 1 and 2 by bringing the leading edge of the bending guide 4 into contact with the rear edge of the introduction guide 3. Easy to use.

  As shown in FIGS. 2 (a) and 2 (d), a male screw part 14 having a small diameter and a right-hand thread is formed at the tip of the pivot 5, and a cylindrical rotary bearing having a diameter slightly larger than the male screw part 14 following the male screw part 14. A portion 15 is formed, and a left-handed screw fixing portion 16 having a diameter larger than that of the rotary bearing portion 15 is formed following the rotary bearing portion 15. A stepped portion 30 having a diameter larger than that of the left screw fixing portion 16 is formed, the pivot shaft 5 is extended, and this extended portion is used as a cylindrical bending shoe 8. The bending shoe 8 is spaced from the bending guide 4 by an interval corresponding to the diameter of the electric wire K so that the electric wire K can be held between the bending shoe 8 and the bending guide 4. A drum-shaped arc surface 13 is formed on the outer surface of the bending shoe 8 so that the electric wire K can be stably held by the bending guide 4. In this case, if a non-slip material such as a rubber lining is provided on the surface of the bending guide 4, the electric wire K may be clamped without sliding.

  A rotation hole 17 is formed in the base plate 11 of one handle 1 on the fixed side, and the rotation bearing portion 15 of the pivot 5 is rotatably inserted. A left screw hole 18 is formed in the base plate 12 of the other handle 2 on the movable side, and a fixing portion 16 formed by a left screw is screwed into the pivot 5. A nut 19 is screwed into a male screw portion 14 at the tip of the pivot 5 through a washer to prevent the base plate 11 of the fixed handle 1 from coming off.

  Thus, since the left screw hole 18 of the other handle 2 on the movable side is screwed into the left screw fixing portion 16 of the pivot 5, the handle 2 on the movable side is held with the right hand and held with the left hand. In the closing operation (bending operation) that rotates clockwise to the one handle 1 side of the fixed side, because the left screw is fitted, the movable handle 2 abuts against the step 30 of the pivot 5 and the movable handle 2 and the pivot As a result, the pivot 5 is integrated with the handle 2 on the movable side. In this case, the pivot 5 fixed to the movable handle 2 rotates in the rotation hole 17 of the fixed handle 1.

According to such a configuration, the handle 1 provided with the introduction guide 3 is held on the fixed side by the left hand, and the handle 2 provided with the bending guide 4 is moved near the fixed side handle 1 by the right hand. In the bending operation, the pivot shaft 5 is fixed to the movable handle 2, and the pivot shaft 5 rotates with respect to the fixed handle 1 together with the movable handle 2 and the bending guide 4. The bending guide 3 does not rotate with respect to the bending shoe 8 extending from 5, and the bending operation is performed with the electric wire K held between the bending shoe 8 and the bending guide 4. K can be sent and bent without being constrained by the guide 3 for introduction on the fixed side, and can be bent well without rubbing the coating of the wire K without scratching the coating. Than is possible.
By the way, since the electric wire K is pinched and bent by the bending guide 4 and the bending shoe 8, the holding position of the electric wire K is not displaced, and therefore the distance from the holding position to the tip of the electric wire K is constant. The wire K can be bent, and even the heat-resistant and hard wire K can be bent with the same dimensions, and the wiring between the devices 9 and 10 attached to the switchboard can be easily and orderly. When the unevenness of the bending dimension is corrected, the terminals 9a and 10a of the devices 9 and 10 are not unexpectedly broken.
Furthermore, in the configuration of the wire bender A, the pivot 5 that pivotally connects the pair of handles 1 and 2 is fixed to the handle 2 on the movable side, and the pivot 5 is extended to form a cylindrical bending shoe 8. The pivot 5 and the bending shoe 8 can be used in common, and a simple configuration can be achieved. The light weight and the size can be reduced, it is easy to use, and the field work is facilitated.

  As shown in FIG. 1A and FIG. 2A, a concave groove 20 is formed in the base plate 12 of the movable handle 2, and a convex strip 21 and a long hole 23 are formed in the receiving plate 25 of the bending guide 4. The set screw 22 formed and inserted through the long hole 23 and screwed into the base plate 12 is loosened, and the convex strip 21 of the receiving plate 25 is slid with respect to the concave groove 20 of the base plate 12 to thereby bend the shoe. The position of the bending guide 4 with respect to 8 can be changed according to the diameter of the electric wire K. A slide structure having similar concave grooves 20 and ridges 21 is formed between the base plate 11 of the handle 1 on the fixed side and the receiving plate 26 of the guide 3 for introduction, and an introduction guide for the bending shoe 8. The position of 3 can be changed according to the diameter of the electric wire K. Reference numeral 24 is a scale of the wire diameter.

  According to such a configuration, by changing the distance of the bending guide 4 with respect to the bending shoe 8, it is possible to easily cope with a change in specification in which the diameter of the electric wire K to be bent changes. In this case, if the position of the introduction guide 3 is adjusted in the same manner as the bending guide 4, the introduction of the electric wire K becomes easy.

  FIG. 3 shows another embodiment in which a dimension scale 6 is formed on the handle 2 having the bending shoe 8 with the position sandwiched between the bending shoe 8 and the bending guide 4 being the zero position. Yes.

  According to such a configuration, by using the dimensional scale 6, the dimension from the bending position to the tip of the electric wire K can be set to a desired dimension, and the bending dimension is corrected more neatly when wiring between the devices 9 and 10. There is no need to break the terminals 9a and 10a of the devices 9 and 10 when the dimensions are corrected.

  Further, the movable handle 2 is provided with a stopper 7 that abuts the tip of the electric wire K so as to be movable along the dimension scale 6. Specifically, the screw 27 is screwed into the receiving plate 25 of the bending guide 4, and the slide plate 28 is moved with respect to the loosened screw 27 in the long hole 29 of the slide plate 28 provided with the stopper 7. The position of can be changed freely.

  According to such a configuration, by using the movable stopper 7, various dimensions from the bending position to the tip of the electric wire K can be accurately obtained.

  By the way, when the electric wire K is bent by the electric wire bender A of the present invention, the introduction guide 3 and the bending guide 4 that are both flat are almost orthogonal to each other, and the electric wire K is cooperated with the bending shoe 8. Although it bends at a substantially right angle, it becomes difficult to bend at a substantially right angle because the bending angle becomes obtuse due to the spring back of the wire K to be bent, but in this case, the position where the introduction guide 3 and the bending guide 4 intersect is determined. It is preferable that the handles 1 and 2 can be rotated until they exceed the upper limit, and the wire K is bent to an acute angle in anticipation of the spring back of the electric wire K.

  In the electric wire vendor A of the present invention, the electric wire K can be bent into a large arc shape. The outline is as follows.

  First, the bending operation is stopped at the middle bending position before both handles 1 and 2 are closed, then both handles 1 and 2 are opened, and the clamping position of the wire K in the previous bending operation is sent to the tip side of the wire K. Next, the bending operation is performed with the position immediately before the holding position of the previous electric wire K as the holding position, and the intermediate bending operation is repeated, whereby the electric wire K can be bent into a large arc shape.

  In the embodiment of the present invention, the left screw hole 18 of the movable handle 2 is screwed into the left screw fixing portion 16 of the pivot 5 so that the movable handle 2 is fixed to the fixed handle 1. The pivot shaft 5 and the movable handle 2 are substantially integrated by closing the left eye with a clockwise clockwise rotation that draws the shaft, but the configuration in which the pivot shaft 5 and the movable handle 2 are integrated is as follows. There are screw fixing, welding, and the like, but various modifications can be made without departing from the spirit of the present invention. The same applies to various configurations in the present embodiment.

1 shows an embodiment of the present invention, (a) shows an open state, (b) is a perspective view showing a bending operation. (A) is a partial front sectional view, (b) is a partial side sectional view, (c) is a partial plan view, and (d) is a partial enlarged sectional view. It is a fragmentary perspective view of other embodiment same as the above. (A) is a perspective view which shows the wiring between apparatuses, (b) is sectional drawing of an electric wire. (A) (b) is operation | movement figure which shows the operation | movement of a prior art example, and was fractured | ruptured partially.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 One handle 2 The other handle 3 Guide for introduction 4 Guide for bending 5 Axis 6 Dimension scale 7 Stopper 8 Bending shoe K Electric wire

Claims (4)

A pair of handles are pivotally connected so that they can be opened and closed, an introduction guide is provided on one handle, a bending guide is provided on the other handle, and along the introduction guide and the bending guide when both handles are open. An electric wire bender that is bent by a bending operation in which the electric wires introduced in this manner bring both handles close to each other,
One handle provided with an introduction guide is rotatable with respect to a pivot for pivotally connecting a pair of handles, the other handle provided with a bending guide is fixed to the pivot, and the pivot extends in the axial direction. An electric wire bender characterized by forming a columnar bending shoe that holds out an electric wire while facing the bending guide.   2. The electric wire bender according to claim 1, wherein a dimension scale is formed on a handle provided with the bending shoe so that a position sandwiched between the bending shoe and the bending guide is a zero position.   The electric wire bender according to claim 2, wherein a stopper with which the tip of the electric wire comes into contact is provided so as to be movable along a dimensional scale.   2. The electric wire bender according to claim 1, wherein the position of the bending guide with respect to the bending shoe is changeable according to the diameter of the electric wire.

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