JP2004167653A - Device for conveying and cutting strip-like material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for conveying and cutting a strip-like material capable of widely improving the formation efficiency of a cut piece while maintaining high cutting quality. <P>SOLUTION: A cutting device 4 is provided between a first transport conveyer 2 having a constant carrying-in speed Ji and a second transport conveyer 3 having a faster carrying-out speed Jo. The cutting device 4 is constituted of a plurality of cutting units 7 having cutting blades 8 and feed conveyers 9 continuously provided on the downstream side of each cutting blade 8. In each feed conveyer 9, the carrying-speed can be changed into a strip-like material feeding speed Va which is a speed for conveying a strip-like material WO at the carrying-in speed Ji, and a cut piece feeding speed Vb which is a speed for conveying the cut piece at the carrying-out speed Jo, and also can be changed into a cut piece feeding speed Vb sequentially from the feed conveyer on the lowest stream side. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is an apparatus for transporting and cutting a long strip which is intermittently transported from an accumulator and which can efficiently form a plurality of cut pieces by cutting the strip at a constant cutting length from a downstream end in the transport direction. About.
[0002]
[Prior art]
For example, in a tire manufacturing process, a carcass ply or the like is used to temporarily cut a strip of a rubberized cord continuously extruded from a rubber extruder or the like into cut pieces of a predetermined length, and cut the cut pieces into non-cut pieces. It is formed by sequentially connecting between the side edges.
[0003]
At this time, in order to obtain the cut pieces,
(1) A belt-like body continuously extruded from a rubber extruder or the like is supplied to a transport / cutting device via an accumulator, and the supplied belt-like body is temporarily stopped on a conveyor of the transport / cutting device. (See, for example, Patent Document 1).
[0004]
[Patent Document 1]
JP 2000-141510 A (FIGS. 1 and 7)
[0005]
[Problems to be solved by the invention]
However, in such a cutting method, it is difficult to reduce the time required for one cutting (cutting time) in maintaining the cutting quality. Therefore, even if the conveying speed of the conveyor is increased, the cutting time is reduced. It has been difficult to increase the forming efficiency of the pieces to, for example, 20 to 25 pieces / min or more. In particular, when the strip is used for forming a cord ply such as a carcass ply and a belt ply, since the tire cord is embedded therein, the cutting time is required to be longer, and the forming efficiency of the cut piece is reduced. It will be even lower.
[0006]
Therefore, an object of the present invention is to provide an apparatus for transporting and cutting a strip which can greatly improve the efficiency of forming a cut piece while securing a sufficient cutting time and maintaining high cutting quality.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 of the present application is to cut a long band-like body intermittently conveyed from an accumulator at a constant cutting length from a downstream end in a conveying direction into a plurality of cut pieces. A transport cutting device for a band-shaped body that is sequentially cut to a fixed size,
An upstream first conveyor that conveys the strip at a constant carry-in speed, and a downstream second conveyor that can convey cut pieces at a carry-out speed higher than the carry-in speed; A cutting device arranged between the second conveyors,
The cutting device has a plurality of cutting tools having cutting blades arranged at an interval equal to the cutting length, and a cutting device connected to a downstream side of each cutting blade, conveying the band-shaped body, and cutting by each cutting blade. A delivery conveyor for delivering the pieces to the downstream side is provided,
Each of the delivery conveyors can be changed to a strip feeding speed for transporting the strip at the loading speed, and a cutting piece feeding speed for transporting the cutting pieces at the unloading speed,
Further, the delivery conveyor is characterized in that the speed is changed to the cutting piece delivery speed in order from the delivery conveyor on the most downstream side.
[0008]
According to a second aspect of the present invention, the delivery conveyor between the cutting blades is provided with a length adjusting means for adjusting a cutting length.
[0009]
According to a third aspect of the present invention, the first conveyor is provided with expansion / contraction means for connecting between the downstream end thereof and the most upstream cutting blade.
[0010]
Further, in the invention of claim 4, the delivery conveyor between the uppermost stream cutting blade and the cutting blade adjacent thereto has a downstream main conveyor section and a belt-like body carried in between the delivery of the cut pieces. And a sub-conveyor section on the upstream side that is allowed.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to illustrated examples. FIG. 1 is a plan view of a belt-shaped body transfer / cutting device (hereinafter referred to as a transfer / cutting device) of the present invention, and FIG. 2 is a side view thereof.
1 and 2, the transport cutting device 1 cuts a long strip W0 intermittently transported from an accumulator Ac (shown in FIG. 7) at a constant cutting length L from a downstream end in the transport direction. And a plurality of cut pieces w are efficiently formed while maintaining high cutting quality.
[0012]
For this purpose, the transport cutting device 1 transports the strip W at an upstream first transport conveyor 2 for transporting the strip W0 at a constant loading speed Ji, and transports the cut pieces w at an unloading speed Jo higher than the loading speed Ji. And a cutting device 4 having a plurality of cutting tools 7 disposed between the first and second conveying conveyors 2 and 3. In the present embodiment, the first and second conveyors 2 and 3 and the cutting device 4 are installed on a table-like support table 5, for example.
[0013]
Further, the cutting device 4 includes a plurality of cutting tools 7 having cutting blades 8 arranged at intervals D equal to the cutting length L on a fixed base 6 erected on the support base 5, and each cutting blade 8. And a delivery conveyor 9 connected to the downstream side. In this example, a case where the fixed base 6 is provided with two cutting tools 7A and 7B and delivery conveyors 9A and 9B which are respectively provided downstream of the cutting blades 8A and 8B are illustrated. I have.
[0014]
As shown in FIG. 3, a conveyor frame 11 constituting the delivery conveyor 9 is attached to the fixed base 6.
[0015]
In this example, the conveyor frame 11 includes an upstream first conveyor frame 11 </ b> A attached to the fixed base 6 via the position adjusting means 12 in a transport direction so as to be adjustable, and a downstream side fixed to the fixed base 6. And the second conveyor frame 11B. The position adjusting means 12 includes a pair of guide rails 12a laid in the transport direction on the fixed base 6 and a mounting position of the first conveyor frame 11A with respect to the fixed base 6 by being guided by the guide rails 12a. And a position adjustment table 12b that can move the sheet in the transport direction. The movement of the position adjustment table 12b can be performed by a motor (not shown) or the like.
[0016]
In addition, in this example, as shown conceptually in FIG. 4, the cutting tool 7A on the upstream side is attached to the upper frame member 15U of the portal frame 15 rising from the position adjusting table 12b or the first conveyor frame 11A. 16 is pivoted vertically. The support shaft 16 is connected to a motor M1 fixed to the upper frame member 15U via a transmission means 17 using, for example, a gear, and the lower end of the support shaft 16 is connected to the cutting blade 8A via a guide means 18. It is mounted to run freely. The guide means 18 includes a guide rail 19 having a guide groove 19a, and a traveling piece 20 that can travel horizontally along the guide groove 19a. The lower end of the cutter holder 21 extending from the traveling piece 20 has, for example, a disk. A cutting blade 8A is rotatably mounted along the traveling direction. The traveling piece 20 can travel by a motor M2 fixed to the guide rail 19. Therefore, the cutting tool 7A can freely adjust the direction of the guide rail 19, that is, the cutting angle with respect to the transport direction, around the support shaft by the operation of the motor M1.
[0017]
The cutting tool 7B on the downstream side has substantially the same configuration as the cutting tool 7A on the upstream side, except that the portal frame 15 is supported by the fixed base 6 or the second conveyor frame 11B. The distance D between the cutting blades 8A and 8B can be adjusted by the position adjusting means 12 according to the cutting length L.
[0018]
Next, the conveyor arranged between the uppermost stream cutting blade 8A and the cutting blade 8B adjacent thereto, that is, the conveyor 9A in the present example is the downstream side as shown in FIG. And a sub-conveyor section 23 on the upstream side.
[0019]
The sub-conveyor section 23 includes a roll 24 pivotally mounted on the first conveyor frame 11A and a conveyor belt 25 wound around each roll 24 so as to be able to rotate. It is configured as a fixed length.
[0020]
On the other hand, the main conveyor section 22 includes a roll 26 that is distributed and pivoted to the first and second conveyor frames 11A and 11B, and a conveyor belt 27 that is rotatably wound around each roll 26. Equipped. Here, of the uppermost row of rolls supporting the transport surface, the upstream roll 26a is pivotally attached to the first conveyor frame 11A, and the downstream roll 26b is connected to the second conveyor frame. Connected to 11B. Accordingly, the main conveyor section 22 moves the first conveyor frame 11A in accordance with the movement of the first conveyor frame 11A, that is, in accordance with the adjustment of the cutting length L by the position adjusting means 12, and conveys the conveying surface which is the distance between the rolls 26a and 26b. The direction length is automatically changed. At this time, as shown in FIG. 3, by arranging the remaining rolls 26c appropriately on the first and second conveyor frames 11A and 11B, the revolving length of the conveyor belt 27 can be kept constant.
[0021]
Therefore, in this example, the delivery conveyor 9A forms the length adjusting means 28 for adjusting the cutting length L by the position adjusting means 12, and the roll 26 is connected to the first and second conveyor frames 11A and 11B. The length of the conveying surface in the conveying direction can be expanded and contracted in accordance with the adjustment of the cutting length L by appropriately distributing and pivoting.
[0022]
Next, as shown in FIG. 2, the first transport conveyor 2 is divided into a conveyor frame 29 fixed to the support table 5 and a movable first conveyor frame 11A, and the roll 30 is pivotally attached to the first conveyor frame 11A. A conveyor belt 31 wound around each roll 30 so as to be able to rotate. Here, among the rolls in the uppermost row supporting the transport surface, the roll 30a at the upstream end is pivotally attached to the fixed conveyor frame 29, and the roll 30b at the downstream end is connected to the movable first conveyor. It is pivotally attached to the frame 11A.
[0023]
Thereby, when the position of the cutting tool 7A is adjusted, the first transport conveyor 2 can change the length of the transport surface in the transport direction, which is the distance between the rolls 30a and 30b, so that it can expand and contract. A certain small interval can be maintained between the upstream cutting blade 8A. Therefore, in this example, the roll 30b at the downstream end forms an expansion / contraction means 32 that connects between the downstream end of the first conveyor 2 and the cutting blade 8A. At this time, as shown in FIG. 2, the revolving length of the conveyor belt 31 can be maintained constant by appropriately arranging the remaining rolls 30c on the conveyor frames 29 and 11A.
[0024]
The second conveyor 3 and the delivery conveyor 9B are fixed belt conveyors attached to the support table 5 and the fixed table 6, respectively. Is configured to be constant.
[0025]
Next, the operation of the transport cutting apparatus 1 of the present embodiment will be described with reference to FIGS.
(1) and (2) in the drawing indicate a standby step, and the band W0 conveyed from the first conveyor 2 at a constant carry-in speed Ji is moved until the leading end thereof reaches a predetermined cutting position Q. The belt-shaped body is conveyed at a feed speed Va (= Ji) equal to the carry-in speed Ji by the feed conveyors 9A and 9B. The cutting position Q is a position where the cutting length L is separated from the cutting blade 8B on the downstream side.
[0026]
Further, (3) in the figure indicates a cutting step, and the first conveyor 2 and the delivery conveyors 9A and 9B stop the conveyance at the same time when the band W0 reaches the cutting position Q. By operating the cutting tools 7A and 7B in this stopped state, two cut pieces w can be cut at a time while ensuring excellent cutting quality and cutting accuracy.
[0027]
Also, (4) to (6) in the drawing indicate a sending step of the cut piece w. Simultaneously with the completion of the cutting, the delivery conveyor 9 operates in order from the most downstream delivery conveyor 9B at a high cutting piece feed speed Vb (= Jo> Ji) equal to the unloading speed Jo, and cuts each cutting piece w. Send it downstream. That is, first, the delivery conveyor 9B is shifted to the cutting piece feed speed Vb, and the cutting piece w1 on the most downstream side is paid out to the second conveyor 3 ((4)).
[0028]
Thereafter, with a small time lag, the main conveyor section 22 of the next delivery conveyor 9A is shifted to the above-mentioned piece feed speed Vb, and pays out the next piece w2 ((5)). At this time, the predetermined time interval d can be formed between the cut pieces w1 and w2 by the small time difference. In the subsequent steps, for example, when forming a carcass ply or a belt ply of a tire, the cut piece w1, The step of sequentially taking out w2 and connecting between the non-cutting side edges can be conveniently performed.
[0029]
After the cut piece w2 is sent out and transferred to the conveyor 9B, the main conveyor section 22 returns from the cut piece feed speed Vb to the band-shaped body feed speed Va. After being transferred to the second conveyor 3, the speed returns to the belt-shaped body feeding speed Va.
[0030]
Here, with the elapse of time in the sending step, the strip W0 is sent from the first conveyor 2 and carried into the conveyor 9A at the carrying speed Ji ([6]). At this time, in order to receive the carry-in portion W0a at the strip-shaped body feeding speed Va without receiving it at the cut-piece feeding speed Vb, the delivery conveyor 9A is formed with the sub-conveyor portion 23 operated at the strip-shaped body feeding speed Va. are doing. Thereby, it is possible to prevent the carry-in portion W0a from being pulled by the main conveyor portion 22 and causing dimensional change and shape distortion. When the belt-like body W0 is not deformed by the above-mentioned pulling, the sub-conveyor section 23 can be omitted.
[0031]
In addition, the control of the transport cutting device 1 can be performed based on the storage amount (loop amount) of the accumulator Ac that stores the belt-shaped body W in a loop shape and stores it. That is, as schematically shown in FIG. 7, sensors S1 and S2 for detecting the upper limit and the lower limit of the storage amount are provided, and when the storage amount increases beyond the upper limit, the transport cutting device 1 is operated, and the stored band W Is transported from the accumulator Ac to the transport cutting device 1 to start cutting. When the storage amount decreases below the lower limit, the transport / cutting device 1 is stopped, and loading / cutting is interrupted.
[0032]
In the conveying and cutting apparatus 1 of the present invention, the cutting length L can be changed between the cutting tools 7A and 7B, that is, the cut pieces w1 and w2 can be cut with different lengths. The cutting device 4 may be provided with three or more cutting tools 7, and the band W may be used for cutting various belts without being limited to tire constituent materials such as tread rubber and cord plies. Can be.
[0033]
As described above, particularly preferred embodiments of the present invention have been described in detail. However, the present invention is not limited to the illustrated embodiments, and can be implemented in various forms.
[0034]
【The invention's effect】
Since the present invention is configured as described above, the cutting time can be sufficiently secured, and the cutting quality and the cutting accuracy can be kept high, while the cut piece forming efficiency can be greatly improved.
[Brief description of the drawings]
FIG. 1 is a plan view showing an embodiment of a transport cutting apparatus according to the present invention.
FIG. 2 is a side view thereof.
FIG. 3 is an enlarged side view showing a cutting device.
FIG. 4 is a perspective view conceptually showing a cutting tool.
FIG. 5 is a diagram illustrating the operation (standby step, cutting step) of the transport cutting apparatus.
FIG. 6 is a diagram illustrating the operation (delivery step) of the transport cutting device.
FIG. 7 is a side view conceptually showing an accumulator.
[Explanation of symbols]
Reference Signs List 1 transport cutting device 2 first transport conveyor 3 second transport conveyor 4 cutting device 7, 7A, 7B cutting tool 8, 8A, 8B cutting blade 9, 9A, 9B delivery conveyor 22 main conveyor section 23 sub-conveyor section 28 Length adjusting means 32 Expansion / contraction means Ac Accumulator L Cutting length Ji Loading speed Jo Unloading speed Va Band feeding speed Vb Strip feeding speed W0 Strip w Cutting

Claims (4)

A long strip that is intermittently conveyed from the accumulator, is a conveyance cutting device for a strip that is cut at a constant cutting length from the downstream end in the conveyance direction and cut into a plurality of cut pieces in order.
An upstream first conveyor that conveys the strip at a constant carry-in speed, and a downstream second conveyor that can convey cut pieces at a carry-out speed higher than the carry-in speed; A cutting device arranged between the second conveyors,
The cutting device has a plurality of cutting tools having cutting blades arranged at an interval equal to the cutting length, and a cutting device connected to a downstream side of each cutting blade, conveying the band-shaped body, and cutting by each cutting blade. A delivery conveyor for delivering the pieces to the downstream side is provided,
Each of the delivery conveyors can be changed to a strip feeding speed for transporting the strip at the loading speed, and a cutting piece feeding speed for transporting the cutting pieces at the unloading speed,
Further, the feeding conveyor is adapted to change the speed of the strip conveyor to the cutting piece feeding speed in order from the most downstream feeding conveyor. 2. The apparatus according to claim 1, wherein the feeding conveyor between the cutting blades has a length adjusting means for adjusting a cutting length. 3. The apparatus according to claim 2, wherein the first conveyor includes an expansion / contraction device that connects a downstream end of the first conveyor with the most upstream cutting blade. A delivery conveyor between the most upstream cutting blade and a cutting blade adjacent thereto is a downstream main conveyor portion, and an upstream sub-conveyor portion which allows a belt-like body to be carried in between the delivery of cut pieces. The transporting / cutting apparatus for a belt-shaped body according to any one of claims 1 to 3, wherein:

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