JPH0475862A - Multiwire type cutting device - Google Patents

Abstract

PURPOSE:To prevent disconnection with the instantaneous high tension of a wire caused by a winding bobbin and further a delivery bobbin being adequately eased, by increasing a pulley made freely movable by an elastic member. CONSTITUTION:A wire 1 is pulled at a high speed because of its peripheral speed being large, when it is led to the large winding diameter part of bobbins 8, 10 or the large diameter part due to eccentricity, and so the tension becomes higher instantaneously. In this case, the wire 1 moves pulleies 24, 29 with their pulling by overcoming the elastic forces of elastic members 28, 29 and the high tension is eased by corresponding to the increase in the winding quantity due to the tensility at high speed with the wire length between the pulleies 24, 29 and bobbins 8, 10 being shortened.

Description

[Detailed description of the invention]

[Before industrial use] The present invention is directed to ``1'', a multi-wire cutting device for cutting old conductor materials and other hard, brittle or fibrous materials into thin plates; This also relates to a cutting device that has the function of alleviating instantaneous high tension and preventing τ from breaking. - A device is used in which multiple wires are arranged in parallel and run back and forth in the same direction, thereby simultaneously cutting them into a large number of thin plates.
-fi No. 280, Japanese Patent Publication No. 1.99/1982, Japanese Patent Publication No. 1999/1983-
J2 seen in Publication No. 48163, a constant tension mechanism is installed between the wire payout bobbin and the take-up bobbin by sandwiching the cut section 1-1 At the cut section, In addition, the material is cut by holding multiple wires arranged in parallel at a constant tension and moving them back and forth in the same direction. The wire as a whole moves little by little from the payout bobbin to the take-up bobbin while reciprocating, and therefore the two bobbins repeatedly wind up and pay out the wire. In this case, it is preferable that the wire be wound uniformly onto the bobbin, and for this purpose a traverser is installed between each bobbin and the constant tension mechanism, but the wire may not be wound uniformly due to the moving speed of the traverser and other factors. Sometimes. Therefore, when a wire is wound through a traverser onto a bobbin that is rotating at a constant rotational speed, when the wire moves from a part with a small winding diameter to a part with a large winding diameter, the peripheral speed is high, so the tensioning speed increases.
As a result, the tension increases instantaneously. With a pay-out bobbin, the wire wound during the go-around is completely paid out during the next go-around, so uneven winding is not added to the winding bobbin, but with a take-up bobbin, the wire wound during the go-around is unwound during the go-around. Since the number of wires is larger than that of the wire, winding unevenness is added and instantaneous high tension is likely to be generated. Furthermore, if the bobbin itself has an eccentric center of rotation, the tension of the wire will vary with each rotation, which may cause an even higher tension to occur in synchronization with uneven winding. On the other hand, the constant tension mechanism detects tension fluctuations in the wire and operates a servo motor to absorb the fluctuations, and cannot cope with high tensions that occur and disappear instantaneously. [Problem to be Solved by the Invention] The problem to be solved by the present invention is to reduce the instantaneous high tension generated in the wire due to the feeding bobbin and the winding bobbin, especially the winding bobbin, in a multi-wire type cutting device. The point is that it cannot be alleviated. That is, an object of the present invention is to provide a multi-wire cutting device that can relieve instantaneous high tension in the wire even if the bobbin is wound unevenly or eccentrically.

[Means to solve the problem]

It is equipped with a cutting section in which a single wire is arranged multiple times in parallel on two multi-groove pulleys, a constant tension mechanism arranged before and after the cutting section, and a wire feeding bobbin and a winding bobbin arranged before and after the cutting section. As a means for solving the above-mentioned problem of the multi-wire cutting device, there is a method for solving the above-mentioned problems of the multi-wire type cutting device. A tension-absorbing pulley, which can be moved freely in the diametrical direction using an elastic material, was installed in the center. [Function 1] When the wire travels from the constant tension mechanism to the take-up bobbin or the pay-out bobbin and is wound on these, the wire is kept at a constant tension by the constant tension mechanism, but the winding diameter of the bobbin When introduced into a large part or a large diameter part due to eccentricity, the circumferential speed is high, so it is pulled at a high speed, and therefore the tension becomes instantaneously high. At this time, the wire overcomes the elastic force of the elastic material and moves the pulley in a bowed manner, and the length of the wire between the pulley and the bobbin is shortened to accommodate the increased winding amount due to high-speed tension. Relieve tension. [Example] The present invention will be described in detail with reference to the drawings. Two multi-groove pulleys 2.3 parallel to each other on a horizontal plane

[. Pulley 2.3
．． 4 are rotated in the same direction and at the same speed by a winding transmission mechanism 7. A feed-out bobbin 8 and a take-up bobbin 10 are installed before and after the cutting section, and each has a driving force 4j! 9. A constant tension mechanism 15 which is driven to reciprocate and rotate by 11 and has a traverse 12, a stationary roller 13 and a dancer opening roller 14 between the payout bobbin 8 and the first multi-groove pulley 2; Pulleys 17 for changing direction are arranged in order, and the wire 1 fed out from the feeding bobbin 8 is wound in the above order and then wound in multiple ways around the multi-groove pulley 2.3.4. , especially the cutting section 5
The multi-groove pulleys 2.3 forming the multi-groove pulleys 2.3 are arranged equidistantly and parallel to each other. Also, a second multi-groove pulley 3 and a winding bobbin 10
A pulley 18 for direction change, a constant tension mechanism 21 having a stationary roller It is wound onto a winding bobbin 10. Each driving force R6, 9, 11 rotates forward and backward in synchronization, and while the wire 1 is traveling back and forth, the whole moves little by little from the unwinding bobbin 8 to the winding bobbin 0, and the cutting part is already moving in the same direction at the same speed. The material is simultaneously cut into a large number of thin pieces by reciprocating multiple arrays of wires 1. Nowadays, the wire 1 is wound on the payout bobbin 8 and the take-up bobbin 10 during the inbound and outbound movements, respectively, but the travers (j
”] 2.23 to ensure uniform winding. However, in reality, the li l-lapazar 12.2
The winding may not be uniform due to factors such as the moving speed in step 3 and the acceleration/deceleration speed of the take-up bobbin 10, resulting in more winding at the center of the bobbin or at both ends of the bobbin. do. In the unwinding bobbin 8, all of the wire 1 wound during the go-around is unwound during the next go-around, so uneven winding is not added and can be seen carefully, but the winding bobbin]
0, a part of the winding j wire during the forward movement remains during the next return movement and is gradually accumulated, so that winding non-uniformity is added. Furthermore, if the centers of rotation of the payout bobbin 8 and the take-up bobbin 10 are eccentric l-, the circumferential speed of the introduction contact point of the wire 1 fluctuates to -. When the wire 1 is introduced into a part with a large winding diameter caused by uneven winding or a large diameter part caused by eccentricity of the center of rotation, the wire 1 is pulled at a high speed and the tension is rises momentarily. On the other hand, the dancer roller 14.20 of the constant tension mechanism 15.21
are wires 1.6e, 2 wound around drums IBb, 22b, which are reciprocally rotated by prime movers 16a, 22a, respectively.
It is suspended from 2e and absorbs tension fluctuations between the relaxed side and the tensioned side, which change every time the wire] reverses its running direction.
~, so as to maintain a constant tension before and after the cutting part 5 -1-
be moved down. Therefore, it is not functionally possible to absorb and relieve instantaneous high tension. According to this embodiment, pulleys 24 and 29 for tension absorption are provided in the portion between the traverser 12 and the constant tension mechanism 15 at the front of the cutting section 5, and the portion between the constant tension mechanism 21 and the traverser 23 at the rear, respectively. is placed, and the traverser 12
The wire 1 that exits the fixed pulley 25, pulley 24, fixed pulley 2
6 and reaches the constant tension mechanism 15, and the wire exiting the constant tension mechanism 21 is wound around the fixed pulley 30, the pulley 29, and the fixed pulley 31 in this order, and reaches the traverser 23. The pulleys 24, 29 support the support frames 27, 32 which freely rotatably support the pulleys 24, 29, and the elastic members 28, 28, which are made of tension coil springs.
By suspending it at 33, it can move freely in the diametrical direction, that is, in the vertical direction. These pulleys 24, 29 are placed at a position where their own weight, the tension of the wire 1 extending downward, and the elastic force of the elastic member 28, 33 are balanced, and the wire 1, which is adjusted to a constant tension by the constant tension mechanism 15, 21, is fed out. It is wound on a bobbin 8 and a winding bobbin 10. At this time, due to the above-mentioned cause, the feeding bobbin 8
When a momentary high tension is generated on the winding bobbin 10 side or the winding bobbin 10 side, the wire 1 overcomes the elastic force of the elastic member 28.33 and pulls the pulleys 24.29 and moves them downwards, and the wire 1 overcomes the elastic force of the elastic member 28.33, pulling the pulley 24.29 and moving it downward. The length of the wire between the wire and the take-up bobbin 10 is shortened to cope with an increase in the winding pattern due to high-speed tension. As the circumferential speed decreases, the tension also decreases, so pulley 2
4.29 returns to initial position. Depending on the overall arrangement of the device, the pulleys 24.29 may be arranged inclined or horizontally, and the support frames 27.3 may be moved along appropriate guides.
2 may be moved, and the elastic member 28.
33 can be constructed with a pneumatic cylinder or the like instead of a spring. Further, although there is no practical problem even if the pulley 24 on the payout bobbin 8 side is omitted, it is more reliable in preventing wire breakage if it is provided.

【 Effect of the invention 】

According to the present invention, it is possible to prevent wire breakage by appropriately relieving instantaneous high tension in the wire caused by the winding bobbin and also the feeding bobbin by simply adding a pulley that is freely movable using an elastic member. be.

[Brief explanation of drawings]

FIG. 1 is a layout diagram showing an embodiment of the present invention. Part, 8... Feeding bobbin, 10... Winding bobbin, 15
．． 21... constant tension mechanism, 24.29... pulley, 28
．． 33...Elastic member,

Claims (1)

[Claims] A cutting section in which a single wire is arranged multiple times in parallel on two multi-groove pulleys, a constant tension mechanism placed before and after the cutting section, and a wire feeding bobbin and winding device placed before and after the cutting section. In a multi-wire cutting device comprising a take-up bobbin; an elastic member is provided between the pay-out bobbin and the front constant tension mechanism and between the rear constant tension mechanism and the take-up bobbin, at least in a portion between the latter; A multi-wire cutting device characterized by having a pulley for absorbing tension that is freely movable in the diametrical direction.