JP3392199B2 - Metal stranded wire bending equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending device for bending or bending a stranded metal wire. 2. Description of the Related Art A wire treatment instrument of an endoscope is required to have good loop stability and to withstand extrusion and retraction for ingestion of cellular tissue in the body. For this reason, a metal stranded wire is used. ing. In the bending of the metal stranded wire, tweezers are used by a manual operation of a person, and an angle is formed by an intuition or experience of an operator, or an angle is formed at regular intervals. [0003] However, since it is difficult to process a large amount of manual processing quickly, a device for bending a metal stranded wire has been required. FIG. 10 shows a bending apparatus described in Japanese Patent Publication No. 62-22693. This bending device is not a stranded metal wire but a device used for bending a wire such as a single wire or a pipe. In FIG. 10, a pressure mold 100 and a clamping mold 1 are shown.
10 are arranged side by side on the same side, and a bending mold 120 is provided facing the clamping mold 110. This device is a wire 13
0 is clamped between the bending mold 120 and the clamping mold 110 and one end of the wire 130 is grasped by the chuck 140. The chuck 140 is fixed to the moving table 150,
When the clamping die 110 rotates in the bending direction around the bending die 120, the wire 130 is pulled in, and the reaction force generated by bending (the force of the wire is applied in the direction of arrow A) is slipped by the pressure die 100. The wire can be bent by supporting. [0005] The bending apparatus shown in FIG. 10 is for bending a wire rod such as a wire or a pipe having a large reaction force generated by bending, and is applicable to bending a metal stranded wire. Can not do. Since the metal stranded wire is soft and has low rigidity, the reaction force generated by bending is small,
This is because, in the device shown in FIG. 10, slip occurs at the time of bending and the tension required for bending is not generated. Accordingly, an object of the present invention is to provide a novel metal stranded wire bending apparatus capable of bending even a soft metal stranded wire. [0007] A metal stranded wire bending apparatus according to the present invention comprises a pair of openable and closable first chucks for sandwiching a wire made of a metal stranded wire, and a first chuck and a wire of the first chuck .
An openable and closable second chuck that sandwiches the wire at a position facing the bending position, a rotation mechanism that rotates at least one of the first and second chucks in the wire bending direction, and a first chuck or a second chuck. At least of the chuck
It is characterized by including a mechanism that allows one to adjust the gripping force of the wire, and a feed mechanism that moves at least one of the first and second chucks in the length direction of the wire. In the above construction, the metal stranded wire is chucked by the opposing first and second chucks, and one of the chucks is rotated by the rotating mechanism, so that even if there is almost no reaction force, The tension required for bending occurs. Thereby, even if it is a soft metal stranded wire, it can be bent reliably. FIG. 1 to FIG. 5 show a metal stranded wire bending apparatus according to a first embodiment of the present invention. This metal stranded wire bending device is shown in FIG.
As shown in FIG. 2 and FIG. 2, a flat base 1, a pair of first chucks 8a, 8b and second chucks 7a, 7b disposed on the base 1, and first chucks 8a, 8
The rotary table 4 is provided with 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 2 made of a stranded metal wire. The first chucks 8a and 8b are mounted on the upper part of the moving table 6. The moving table 6 penetrates an elongated hole 18 formed in the base 1, and a lower portion thereof is a cylinder 10.
Connected to the rod. As a result, the first chucks 8a and 8b can move up and down. The turntable 4 is arranged below the base 1, and the above-described cylinder 10 is attached to the turntable 4.
Thus, when the rotary table 4 is rotated by the drive of a drive source (not shown), the chucks 8a and 8b are rotated integrally with the rotation. The rotary table 4 is rotatably supported on a pedestal block 11, and the ball screw 3 passes through the pedestal block 11 in a threaded state. The ball screw 3 extends in the longitudinal direction of the wire 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 a motor 14. The rotation of the ball screw 3 by the driving of the motor 14 causes the rotary table 4 to move together with the pedestal block 11 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 rotary table 4 is engaged with the guide rail 20, and the movement of the wire 2 in the longitudinal direction is guided. The second chucks 7a and 7b are arranged on the base 1 so as to face the first chucks 8a and 8b. The second chucks 7a and 7b are detachably supported by a fixed base 5 attached to the base 1. The second chucks 7a, 7b and the first chucks 8a,
8b sandwiches the wire 2 from both sides,
The ball screw 3 and the first and second chucks 8a and 8
The relative positions of b, 7a, and 7b are set. Further, each of the chucks 8a, 8b, 7a, 7b is formed to have an acute angle at the tip end, thereby forming the first chucks 8a, 8b.
The interference between the chucks during rotation of a is prevented. The wire 2 is supplied from a wire reel 9 and chucked by first and second chucks 8a, 8b, 7a, 7b. A guide 15 through which the wire 2 is inserted in the supply direction of the wire 2 is provided. Are arranged. Further, a pin hole 21 is provided on the base 1 between the first chucks 8a, 8b and the second chucks 7a, 7b, and a bending pin 22 is set up in this pin hole 21 in a detachable manner. It has become. FIGS. 4 and 5 show the first and second chucks 8a, 8b, 7a and 7b, respectively, and the insertion holes 2 into which the hand rods of the movable base 6 and the fixed base 5 are inserted.
3, 26 are formed in the vertical direction. Each of the chucks 8a, 8b, 7a,
Screw holes 24 and 25 into which fixing screws (not shown) are screwed are formed in side portions 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 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 formation of the U-turn portion 2D. Is processed in the order of the fourth bent portion 2E, the fifth bent portion 2F, and the sixth bent portion 2G. Each of the bent portions 2A, 2B, 2C, 2E, 2F,
2G bending is performed in the following procedure. First, the wire 2 is passed through with the first and second chucks 8a, 8b, 7a, 7b opened, and the chucks are closed and chucked. In this state, the turntable 4 rotates, and the first chucks 8a and 8b rotate by a predetermined angle. In this rotation, the wire 2 is bent at a predetermined angle by applying a predetermined tension without slipping because the second chucks 7a and 7b on the fixed side are chucked. After this bending, the second chucks 7a and 7b on the fixed side are opened. Then, the motor 14 is driven to move the pedestal block 11, and the first chucks 8a and 8b are moved. Thus, the wire 2 is pulled out until the next bending position reaches the second chucks 7a and 7b. After this drawing, the second chuck 7a,
7b chucks the wire 2 and the first chucks 8a and 8b open. Then, the movable table 6 is moved below 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 the original positions and return to the previous bending position. Thereafter, the first chucks 8a and 8b are moved upward by the cylinder 10 to chuck the wire 2 and perform bending in the same manner as described above.
The above driving is automatically performed by numerical control of a control device (not shown). When bending the U-turn part 2D,
As shown in FIG. 3, the chucks 7b of the second chucks 7a and 7b are removed from the fixing table 5, while the bending pins 21
Is erected. Removal of the chuck 7b and mounting of the bending pin 21 may be performed by an operator or may be performed by a cylinder controlled by a control device. In the state shown in FIG. 3, the rotary table 4 rotates, and the first chucks 8a and 8b rotate in the direction of the arrow. This rotation is performed until the chuck 8b comes into contact with the chuck 7a, whereby the wire 2 is integrally routed to form the U-turn portion 2D. In this embodiment as described above, the first
And, since the wire is rotated while being chucked by the second chuck, even if the wire is a soft metal stranded wire,
Tension required for bending can be generated, and bending can be performed reliably. In addition, since the first chuck moves in the longitudinal direction of the wire, the wire can be continuously bent. Second Embodiment FIGS. 7 and 8 show a second embodiment of the present invention, wherein the same elements as those in the first embodiment are assigned the same reference numerals. In this embodiment, an opening 19 is formed in the base 1, and the fixing base 5 is attached to the support member 17 in the opening 19. In this case, the second chucks 7a and 7b attached to the fixed base 5 are located above the base 1. The support plates 12 and 13 are provided so as to stand on the base 1, and the ball screws 3 are rotatably supported on the support tables 12 and 13. The rotary table 4 is rotatably mounted on the lower surface of the pedestal block 11 screwed to the ball screw 3, and the cylinder 10 is mounted on the lower surface of the rotary table 4. A movable hand 16 capable of adjusting the gripping force of the first chucks 8a, 8b is connected to the cylinder 10, and the movable hand 16 is connected to the first chucks 8a, 8b.
Is attached. In this case, the first chuck 8
a and 8b are attached so as to have a gap of about 3 to 5 mm from the base 1. In the above configuration, the wire 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 chucking is performed with a force enough to be released by the pulling force. And
The rotation of the rotary table 4 and the rotation of the ball screw 3 move the pedestal block 11 in the longitudinal direction of the wire 2. Accordingly, 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.
I can be processed into the wire 2. In this embodiment, a curved portion can be formed on the wire 2 in addition to the bent portion, and complicated bending can be performed. In addition, since the mechanism for moving and rotating the first chuck is disposed above the base 1, even if the wire hangs down when the chucking is released, it does not interfere with the mechanism and can operate smoothly. . Further, since the wire 2 can be processed close to the base 1, continuous bending with less torsion can be performed. As described above, according to the present invention, a metal stranded wire that is soft and hard to have a habit can be reliably bent.
Moreover, bending can be performed continuously.

[Brief description of the 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 the operation. FIG. 4 is a plan view of the 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. 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)

(57) [Claim 1] A pair of openable and closable first chucks for sandwiching a wire made of a metal stranded wire, and the first chucks
An openable / closable second chuck for sandwiching the wire at a position facing the wire bending position, a rotating mechanism for rotating at least one of the first and second chucks in the wire bending direction, a first chuck or Less second chuck
And a feed mechanism for moving at least one of the first and second chucks in the longitudinal direction of the wire rod. .