JPH07144242A - Device for bending metal stranded wire - Google Patents

Abstract

PURPOSE:To generate a tension required to bend even if a reaction force is hardly generated, and to surely bend a metal stranded wire even if it is soft, by chucking the metal stranded wire with first and second chucks opposite each other and rotating either one side chuck by a rotating mechanism. CONSTITUTION:A rotating table 4 rotates in the state of chucking a wire 2, and the first chucks 8a, 8b rotate by a specific angle. Since the wire 2 is chucked by the second chucks 7a, 7b of the fixing side in this rotation, it is bent by the specific angle without slippage by being applied with a specific tension. After then, the second chucks are opened, a motor 14 is driven, a stand block 11 is moved, and the first chucks are moved. In such a way, the wire 2 is pulled out until its next bending position reaches the second chucks 7a, 7b. After then, the first chucks 8a, 8b chuck the wire 2 through a cylinder 10, and it is bent in the same way.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending device for bending or bending a metal strand.

[0002]

2. Description of the Related Art A wire treatment tool for an endoscope is required to have good loop stability and withstand push-out and pull-in due to ingestion of cellular tissue in the body, and therefore, a metal strand is used. This bending of the metal stranded wire uses a pair of tweezers manually by a person to make an angle depending on the intuition and experience of the operator, or to make an angle at regular intervals.

However, since manual work is quick and a large amount of processing is difficult, a device for bending a metal strand has been required. FIG. 10 shows a bending device described in Japanese Patent Publication No. 62-22693. This bending device is a device used for bending a wire material such as a single wire or a pipe, not a stranded metal wire.

In FIG. 10, a pressure die 100 and a fastening die 1
10 are arranged side by side on the same side, and a bending die 120 is provided facing the fastening die 110. This device uses wire 13
0 is clamped between the bending die 120 and the clamping die 110, and one end of the wire rod 130 is grasped by the chuck 140. The chuck 140 is fixed to the moving table 150,
While the tightening die 110 rotates in the bending direction around the bending die 120, the wire rod 130 is pulled in, and the reaction force (the force of the wire rod is applied in the direction of arrow A) generated by the bending is slid by the pressure die 100. The wire rod can be bent by supporting it.

[0005]

The bending device shown in FIG. 10 is for bending a wire material such as a wire or a pipe, which has a large reaction force generated by bending, and cannot be applied to the bending of a metal stranded wire. . Since the metal stranded wire is soft and has low rigidity, the reaction force generated by bending is small,
This is because the device shown in FIG. 10 does not generate tension during bending due to slippage during bending.

An object of the present invention is to provide a novel apparatus for bending a metal twisted wire, which is capable of bending even a soft metal twisted wire.

[0007]

SUMMARY OF THE INVENTION A metal twisted wire bending apparatus according to the present invention includes a pair of openable and closable first chucks for sandwiching a wire rod made of a metal twisted wire, and a wire rod at a position facing the first chuck. A second chuck that can be opened and closed freely,
A rotation mechanism that rotates at least one of the first and second chucks in the bending direction of the wire rod; and a feed mechanism that moves at least one of the first and second chucks in the length direction of the wire rod. Characterize.

[0008]

In the above structure, the twisted metal wire is chucked by the opposing first and second chucks, and one of the chucks is rotated by the rotating mechanism, so that a bending force is required even if there is almost no reaction force. Tension is generated. As a result, even a soft metal strand can be reliably bent.

[0009]

Embodiment 1 FIGS. 1 to 5 show a metal stranded wire bending apparatus according to Embodiment 1 of the present invention. This metal strand bending device is shown in Fig. 1.
As shown in FIG. 2, a flat plate-shaped base 1, a pair of first chucks 8a and 8b and second chucks 7a and 7b arranged on the base 1, and first chucks 8a and 8a.
A rotary table 4 as a rotary mechanism for rotating b and a ball screw 3 as a feed mechanism for moving the rotary table 4 in the length direction of the wire rod 2 made of a stranded metal wire are provided.

The first chucks 8a and 8b are attached to the upper part of the moving table 6. The movable table 6 penetrates through an elongated hole 18 formed in the base 1, and the lower part thereof is a cylinder 10
Is connected to the rod. As a result, the first chucks 8a and 8b can be moved up and down. The rotary table 4 is arranged below the base 1, and the above-mentioned cylinder 10 is attached to the rotary table 4.
As a result, when the rotary table 4 is rotated by the driving of the drive source (not shown), the chucks 8a and 8b are integrally rotated with this rotation.

The rotary table 4 is rotatably supported on the pedestal block 11, and the ball screw 3 penetrates through the pedestal block 11 in a screwed state. The ball screw 3 extends in the length direction of the wire rod 2 with both ends rotatably supported by support plates 12 and 13 hanging from the base 1. The right end of the ball screw 3 is connected to the motor 14, and the rotation of the ball screw 3 by the drive of the motor 14 causes the rotary table 4 together with the pedestal block 11 to move in the length direction of the wire 2. First chuck 8
a and 8b move integrally in the same direction. The lower portion of the pedestal block 11 that rotatably supports the turntable 4 is engaged with the guide rail 20 to guide the movement of the wire rod 2 in the longitudinal direction.

The second chucks 7a, 7b are arranged on the base 1 so as to face the first chucks 8a, 8b. The second chucks 7a and 7b are detachably supported by a fixed base 5 attached to the base 1. The second chuck 7a, 7b and the first chuck 8a,
8b is for sandwiching the wire 2 from both sides,
The ball screw 3 and the first and second chucks 8a, 8a, 8a
The relative positions of b, 7a and 7b are set. Further, the tips of the respective chucks 8a, 8b, 7a, 7b are formed in an acute angle shape, whereby the first chucks 8a, 8a are formed.
Interference between the chucks during rotation of a is prevented.

The wire rod 2 is supplied from the wire rod reel 9 and chucked by the first and second chucks 8a, 8b, 7a, 7b, and the guide 15 through which the wire rod 2 is inserted in the feeding direction of the wire rod 2. Is provided. Further, a pin hole 21 is provided on the base 1 between the first chuck 8a, 8b and the second chuck 7a, 7b, and a bending pin 22 is detachably erected in the pin hole 21. It has become.

4 and 5 show the first and second chucks 8a, 8b, 7a, 7b, and the insertion holes 2 into which the hand rods of the movable table 6 and the fixed table 5 are inserted.
3, 26 are formed vertically. Further, the chucks 8a, 8b, 7a corresponding to the insertion holes 23, 26,
Screw holes 24, 25 into which fixing screws (not shown) are screwed are formed in the side surface portion of 7b, and each chuck is fixed to the corresponding hand rod by tightening the fixing screws.

Next, the operation of bending the wire 2 according to this embodiment will be described. FIG. 6 shows the bent wire rod 2, which is processed in the order of the first bent portion 2A, the second bent portion 2B, the third bent portion 2C, and the U turn portion 2D, and after the U turn portion 2D is formed. Is processed in the order of the fourth bent portion 2E, the fifth bent portion 2F, and the sixth bent portion 2G.

Each bent portion 2A, 2B, 2C, 2E, 2F,
The 2G bending process is performed in the following procedure. First, the wire rod 2 is passed through with the first and second chucks 8a, 8b, 7a, 7b opened, and the chucks are closed for chucking. In this state, the rotary table 4 rotates, and the first chucks 8a and 8b rotate by a predetermined angle. In this rotation, since the second chucks 7a and 7b on the fixed side are chucked, the wire rod 2 is not slipped and is bent at a predetermined angle by applying a predetermined tension. After this bending is performed, the second chucks 7a and 7b on the fixed side are opened, and then the motor 14 is driven to move the pedestal block 11 and the first chucks 8a and 8b are moved. As a result, the wire 2 is pulled out until the next bending position reaches the second chucks 7a and 7b.

After this withdrawal, the second chuck 7a,
7b chucks the wire 2 and the first chucks 8a, 8b open. Then, the movable table 6 is moved to the bottom of the base 1 by the cylinder 10, and the rotation of the rotary table 4 causes the first chucks 8a and 8b to return to their original positions and to return to the previous bending processing position. After that, the first chucks 8a and 8b are moved upward by the cylinder 10 to chuck the wire rod 2 and bending is performed as described above.
The above driving is automatically performed by numerical control of a control device (not shown).

When bending the U-turn portion 2D,
As shown in FIG. 3, the chucks 7b of the second chucks 7a and 7b are removed from the fixed base 5, while the bending pins 21
To stand. The removal of the chuck 7b and the attachment of the bending pin 21 may be performed by an operator or a cylinder controlled by a control device. In the state of FIG. 3, the rotary table 4 rotates and the first chucks 8a and 8b rotate in the arrow direction. This rotation is performed until the chuck 8b comes into contact with the chuck 7a, whereby the wire 2 is integrally drawn around and the U-turn portion 2D is formed.

In this embodiment as described above, the first
And since the wire is rotated while being chucked by the second chuck, even with a soft metal strand,
The tension required for bending can be generated, and bending can be performed reliably. Further, since the first chuck moves in the length direction of the wire rod, the bending work can be continuously performed on the wire rod.

[0020]

Second Embodiment FIGS. 7 and 8 show a second embodiment of the present invention, in which the same elements as in the first embodiment are designated by the same reference numerals. In this embodiment, an opening 19 is formed in the base 1, and the fixed base 5 is attached to the support member 17 in the opening 19 portion. In this case, the second chucks 7 a and 7 b attached to the fixed base 5 are located above the base 1. The support plates 12 and 13 are provided so as to stand upright on the base 1, and the ball screws 3 are rotatably supported on the support bases 12 and 13. The rotary table 4 is rotatably attached to the lower surface of the pedestal block 11 that is screwed into the ball screw 3, and the cylinder 10 is attached to the lower surface of the rotary table 4. A moving hand 16 capable of adjusting the gripping force of the first chucks 8a and 8b is connected to the cylinder 10, and the first chucks 8a and 8b are connected to the moving hand 16.
Is attached. In this case, the first chuck 8
The a and 8b are attached to the base 1 with a gap of about 3 to 5 mm.

In the above structure, the wire rod 2 is chucked by the first and second chucks 7a, 7b, 8a, 8b, but the first chucks 7a, 7b are somewhat strengthened by the moving hand 6 driven by air. It is adjusted so that it will be chucked with a force that allows it to be pulled out by the pulling force. And
While rotating the rotary table 4 and the ball screw 3, the pedestal block 11 is moved in the longitudinal direction of the wire 2. As a result, the first chucks 8a and 8b move in the longitudinal direction while rotating, and at this time, a frictional force acts on the wire 2. As a result, as shown in FIG. 9, the curved portion 2H or 2
I can be processed into the wire rod 2.

In this embodiment as described above, in addition to the bent portion, the curved portion can be formed on the wire 2 and complicated bending can be performed. Further, since the mechanism portion for moving and rotating the first chuck is arranged above the base 1, even if the wire rod hangs down when the chucking is released, it does not interfere with the mechanism portion and a smooth operation becomes possible. . Further, since the wire rod 2 can be worked close to the base 1, it is possible to perform continuous bending work with less twist.

[0023]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, it is possible to reliably bend a metal stranded wire which is soft and hard to have a habit.
Moreover, the bending process can be continuously performed.

[Brief description of drawings]

FIG. 1 is a side view of a first embodiment of the present invention.

FIG. 2 is a plan view of the first embodiment.

FIG. 3 is a plan view showing an example of operation.

FIG. 4 is a plan view of a chuck.

FIG. 5 is a side view of the chuck.

FIG. 6 is a plan view of a bent wire rod.

FIG. 7 is a side view of the second embodiment.

FIG. 8 is a plan view of the second embodiment.

FIG. 9 is a plan view of another bent wire rod.

FIG. 10 is a perspective view of a pipe bending apparatus.

[Explanation of symbols]

 2 wire rod 4 rotary table 7a, 7b second chuck 8a, 8b first chuck

Claims (1)

[Claims] 1. A pair of openable and closable first chucks for sandwiching a wire rod made of a stranded metal wire, and an openable and closable second chuck for sandwiching the wire rod at a position facing the first chuck. A rotating mechanism for rotating at least one of the two chucks in the bending direction of the wire rod;
And a feed mechanism for moving at least one of the chucks in the length direction of the wire rod.