JPH0699391A - Method and device for cutting sheet-shaped material - Google Patents

Abstract

PURPOSE:To provide a method and a device for cutting a sheetshaped material whereby the sheet-shaped material can be cut so that it is matched with a wire angle of the fed sheet-shaped material and also ends of the cut sheet-shaped material cut each other always obtain a degree of parallelization within a permissible range. CONSTITUTION:In the case of conveying a sheet-shaped material S from its cut position, a distance, till a cut end of the sheet-shaped material S passes through two sensors SA, SB set up in the width direction of a conveyer belt 2a, is respectively detected, to obtain respective moving amounts of the cut end from this detection signal. A cut end angle of the sheet-shaped material S is calculated from a difference between these moving amounts, and a running angle of a cutter 3a is changed to cut the next cut part of the sheet-shaped material, S so as to obtain this calculated angle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for cutting a sheet-shaped material, and more particularly to cutting so that the cut ends of the cut sheet-shaped material always have a parallelism within an allowable range. The present invention relates to a sheet-shaped material cutting method and apparatus capable of cutting the sheet-shaped material.

[0002]

2. Description of the Related Art Generally, a tire constituent material such as a carcass material or a steel belt material is composed of a cord cloth with a rubber in which a steel wire is embedded in a bias direction or at a right angle direction with respect to its longitudinal direction. When conveyed to the green tire forming step, the sheet-shaped tire constituent material unwound from the drum is cut into a predetermined length along the steel wire. The cut tire constituent materials are laminated in a cylindrical shape in the process of forming a green tire, but in order to always keep the joint state of the joint, which has a great influence on the uniformity of the tire, constant, the cut ends are mutually It is extremely important that they are cut in parallel.

By the way, conventionally, a sheet-shaped tire constituent material unwound from a drum is cut by an automatic cutting device. Various automatic cutting devices of this kind have hitherto been devised, and a cutter capable of traveling in the width direction of a sheet-shaped tire constituent material conveyed on a conveyor belt and capable of changing the traveling direction (traveling angle) is used. I have it. The running angle of the cutter is set in advance according to the specifications of the tire constituent material, and the sheet-shaped tire constituent material conveyed on the conveyor belt is guided along the steel wire at the same setting angle until the winding is completed. I try to cut it.

[0004]

However, in the above-mentioned cutting method, the molded sheet-shaped tire constituent material (sheet-shaped material) is wound on a drum and stocked, or in the green tire. The angle of the sheet material slightly changes (dimension change) during unwinding when it is conveyed to the molding process, and the cutting angle is allowed when cutting to a predetermined length (about 2 m) with the cutting device There was a problem that it would exceed the range.

That is, when the cutting angle is fed beyond the allowable range, a cutting error occurs because the cutting line is different from the traveling line of the cutter. Further, even if cut, the end portion is bent, and when the cut sheet-shaped material is used to form a green tire, the joint state of the joint is deteriorated, so that the uniformity of the tire after vulcanization is greatly reduced. Of.

Further, when a cut error occurs, it is necessary to manually correct the bending of the sheet-shaped material, and it is necessary to monitor the cut error and the operator's work becomes complicated. The present invention was devised by focusing on such a conventional problem. The cutting is performed so as to match the wire angle of the sent sheet material, and the cut ends of the cut sheet material are always within an allowable range. It is an object of the present invention to provide a sheet-shaped material cutting method and apparatus capable of cutting the sheet-shaped material so that the inner parallelism thereof is achieved, and thereby maintaining good tire uniformity after vulcanization molding.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention uses a cutter provided at a cutting position midway in the transfer direction of a conveyor belt to form a sheet of material which is conveyed by a conveyor belt. A method for cutting a sheet-shaped material of a predetermined length along the width direction of the material, wherein the conveyor belt is activated when the sheet-shaped material is conveyed by activating the conveyor belt from the cutting position of the sheet-shaped material. From the time until the cut end of the sheet-shaped material is detected by the two sensors installed in the width direction of the conveyor belt, the two sensors and the feed amount detection device respectively detect the detection signal, and the detection signal is detected as an angle. The sheet-shaped material is input based on the difference between the moving amounts from the cutting position to the detection by the sensor by inputting to the measuring means. The gist is to calculate the cutting edge angle and change the traveling angle of the cutter through the angle changing device so that the calculated cutting angle is obtained, and cut the next cutting portion of the sheet-shaped material. .

Further, in the sheet material cutting device,
In a sheet material cutting device equipped with a cutter capable of traveling in the width direction of a sheet material conveyed on a conveyor belt and having a traveling angle changeable, above the conveyor belt and on the unloading side from the cutter. Two sensors for detecting the cut end of the sheet-shaped material, and a feed amount detection device for detecting the feed amount of the sheet-shaped material,
Based on the input signals from the sensor and the feed amount detection device, the moving amounts from the two cutting positions of the cutting end of the sheet-shaped material to the sensor are obtained, and the cutting end of the sheet-shaped material is calculated based on the difference between the moving amounts. A gist includes a control device having an angle measuring means for calculating an angle, and an angle changing device for changing a traveling angle of the cutter based on an output signal corresponding to a value calculated by the angle measuring means. It is a thing.

[0009]

The present invention is constructed as described above, and has two sensors for detecting the cut end of the sheet-shaped material installed in the width direction of the conveyor belt, and a feed amount detection device for detecting the feed amount of the sheet-shaped material. Are installed, and the moving amounts of the two cut ends of the sheet-shaped material are obtained by the angle measuring means based on the detection signals obtained by these, and the cutting-edge angle of the sheet-shaped material is determined based on the difference between the moving amounts. Is calculated and the next cut portion of the sheet-shaped material is cut at that angle, so the sheet-shaped material is unwound on a drum while being stocked, or unwinding when it is conveyed to the green tire molding process. Even if there is a slight angle change (dimension change) in the sheet material during cutting, it becomes possible to cut without cutting failure when cutting to a predetermined length, and the cut ends of the cut sheet material of Gyodo does not exceed the allowable range.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 and 2 are schematic views showing a sheet material cutting device according to the present invention.
A belt conveyor device 2 having a conveyor belt 2a for conveying a sheet material S such as a carcass material or a steel belt material unwound from a winding drum, and a sheet material S
Cutting means 3 provided with a cutter 3a for cutting the sheet, and two sensors SA and SB for detecting the cut end of the sheet material S
A feed amount detection device 5 that detects the feed amount of the sheet material S, an angle detection device 6 that detects the traveling angle of the cutter 3a, and an angle that calculates the angle of the cut end of the sheet material S in the width direction. Control device 7 having measuring means, and cutter 3
The angle changing device 8 for changing the running angle (running direction) of a.

In the belt conveyor device 2, a conveyor belt 2a is wound around two pulleys 2b and 2c. A drive motor Mo for driving the conveyor belt 2a is connected to the pulley 2b on the front end side. The cutting means 3 is installed above the conveyor belt 2a.
It has a disc-shaped cutter 3a, and the cutter 3a can travel so as to linearly separate from the center of the conveyed sheet material S in the width direction of the sheet material S, and the sheet material The running angle of S with respect to the width direction can be changed, and it can be moved up and down as in the conventional case.

When the sheet material S is conveyed on the conveyor belt 2a and stopped, the cutter 3a descends and cuts into the central portion of the sheet material S, and the two cutters 3a.
Respectively separate linearly in the width direction of the sheet material S and cut the sheet material S along the direction of the steel wire. When the cutting is completed, the cutter 3a rises, and the two separated cutters 3a return to the central portion and stand by for the next cutting.

Even if the traveling angle of the cutter 3a is changed above the widthwise direction of the sheet-like material S being conveyed and on the unloading side of the sheet-like material S from the cutter 3a. It is installed so that it is always parallel to the direction of travel. A non-contact type detection sensor such as a laser displacement meter or a distance limited type photoelectric tube is used for these sensors SA and SB, and the sheet material is determined by the difference between the distance to the conveyor belt 2a and the distance to the upper surface of the sheet material S. S
Detects that the cut end of is passing.

The feed amount detecting device 5 is a pulse generator PG.
This pulse transmitter PGo is connected to the drive motor Mo through pulleys 5a and 5b and a timing belt 5c, and emits a pulse when the drive motor Mo is operated. Therefore, by counting this pulse, the feed amount of the conveyor belt 2a, that is, the feed amount of the sheet material S conveyed on the conveyor belt 2a can be obtained.

The angle detector 6 is a pulse generator PG1.
Is equipped with. The pulse generator PG1 is installed near a rotating member (not shown) that rotates when the cutter 3a of the cutting means 3 changes the traveling angle, detects the rotation of the rotating member, and outputs a pulse signal. It is designed to output. As shown in FIG. 3, the control device 7 includes an input / output unit 7a, a memory unit 7b, and a calculation unit 7c. The input / output unit 7a has a drive motor M for the belt conveyor device 2.
o, the cutting means 3, the two sensors SA and SB, the feed amount detecting device 5, the angle detecting device 6, the angle changing device 8 and the like are connected to deliver signals. The memory unit 7b stores a program for storing data that has been input, that is being calculated, or that has been calculated, or that operates the control device 7. The calculation unit 7c calculates the angle of the cut end of the sheet material S in the width direction based on the input signals from the sensors SA and SB and the feed amount detection device 5. Further, 7d is a control unit for controlling the exchange of signals with each device inside and outside the control device 7.

The angle changing device 8 is connected to the input / output part 7a of the control device 7 as described above, and the cutter is based on the correction output signal corresponding to the cutting edge angle calculated by the calculation part 7c of the control device 7. A drive circuit 8A and a drive mechanism 8B for changing the traveling direction (traveling angle) of 3a are provided. The drive mechanism 8B is a drive motor M driven by a drive circuit 8A.
1 and the cutter 3a of the cutting means 3 has a screw shaft 8a that engages with the cutting means 3 so that the traveling angle can be changed, and the drive motor M1 and the screw shaft 8a include pulleys 8b and 8c and a chain 8a.
It is connected via d. Therefore, the drive motor M1 is actuated by the correction signal from the control device 7 via the drive circuit 8A, the screw shaft 8a is rotated in a predetermined direction, and the cutter 3a of the cutting means 3 is rotated as shown by the arrow X in FIG. The traveling direction is changed and the traveling angle of the cutter 3a is changed to the cutting edge angle calculated by the calculation unit 7c.

Next, a cutting method for cutting the sheet-shaped material S using the sheet-shaped material cutting device 1 of the present invention having the above-mentioned structure will be described. The sheet material S is unwound from the winding drum and is fed to the conveyor belt 2a of the belt conveyor device 2 by a supply belt conveyor device (not shown) provided adjacent to the belt conveyor device 2. To supply. At this time, belt conveyor device 2
And the belt conveyor device for supply are operated in synchronization.
The tip of the sheet-shaped material S is previously cut along the steel wire, the angle of the tip is detected and the traveling angle of the cutter is automatically changed, and the sheet-shaped material cutting device 1 starts a normal operation.

The belt conveyor device 2 and the feeding belt conveyor device are activated, and the sheet material S whose tip is cut along the steel wire is conveyed on the conveyor belt 2a below the sensors SA and SB. To be done. At this time, the sheet material S passed by the sensors SA and SB
The cutting edge of is detected. This detection signal is input to the control device 7 via the input / output unit 7a.

A pulse signal is input to the control device 7 from the feed amount detection device 5 via the input / output section 7a while the belt conveyor device 2 is activated, and the movement amount of the sheet material S ( The movement amount of the conveyor belt 2a) is counted. When the detection signals from the sensors SA and SB are input, the control device 7 causes the calculation unit 7c to calculate the cutting edge angle in the width direction of the sheet material S according to the program stored in the memory 7b. The sheet material S is shown in FIG.
The principle of calculating the cutting edge angle of is shown.

Θ ₀ : desired cutting edge angle of sheet material S L ₀ : distance between two sensors SA and SB θ ₁ : traveling angle of cutter 3 a L ₁ , L ₂ : sheet materials from sensors SA and SB Respective distances l ₁ , l _{2 to} the cut end of S: straight lines A and B drawn from the sensors SA, SB in parallel with the flowing direction of the sheet material S, respectively: straight lines l ₁ and l ₂ and the sheet material S intersection of the cut end D: intersection intersection C line and the straight line l ₁ drawn parallel to the traveling angle theta ₁ of the cutter 3a from B, E: intersection a, perpendicular line and the straight line l ₂ drawn from each of D
Intersection between L _3: L ₂ -L ₁ distance L ₀ is previously stored in the memory 7b, the driving angle theta ₁ of the cutter 3a is stored in the memory 7b sought by a signal from the angle detection device 6, the distance L ₁ and L ₂ are sensors S for the pulse signal from the feed amount detecting device 5.
It is obtained by counting the amount from A, SB until the signal is detected.

Therefore, the cutting edge angle θ ₀ of the sheet-like material S to be obtained is tan θ ₀ = AC / BC (1) AC = DE = L ₀ sin θ ₁ (2) BC = BE-AD = L ₀ cos θ ₁ −L ₃ (3) From (1) (2) (3) tan θ ₀ = (L ₀ sin θ ₁ ) / (L ₀ cos θ ₁ −
L ₃ ) Therefore, θ ₀ = tan ⁻¹ [(L ₀ sin θ ₁ ) / (L ₀ cos θ
₁₋ L ₃ )] As described above, in the calculation unit 7c of the control device 7, the difference L in the movement amount is
Based on ₃ , the cutting edge angle θ _{0 of} the sheet material in the width direction is calculated. Then, a correction signal corresponding to the calculated difference between the cutting edge angle θ ₀ of the sheet material S and the traveling angle θ ₁ of the cutter 3a is input to the drive circuit 8A of the angle changing device 8 via the input / output unit 7a, The drive motor M1 is rotated in a required direction by a predetermined angle to cut the cutter 3 of the cutting means 3.
The traveling angle θ ₁ of a is corrected to the cutting edge angle θ ₀ .

The angle detecting device 6 detects whether or not the traveling angle θ ₁ of the cutter 3a has been accurately corrected to the cutting edge angle θ _{0. In} the case of no, a correction signal is again sent from the control device 7 to the angle changing device 8. It is output to the drive circuit 8A and the traveling angle of the cutter 3a is corrected to the cutting edge angle θ ₀ of the sheet-shaped material S (servo is applied). Belt conveyor device 2
The sheet-like material S being conveyed on the conveyor belt by the feeding and belt conveyor device is picked up at its leading end by a take-up belt conveyor device (not shown) installed at the carry-out port of the belt conveyor device 2 and further conveyed. To be done.

When the sheet material S is conveyed to a predetermined cutting length, the sheet material S is conveyed to a predetermined cutting length by counting pulse signals from the feed amount detecting device 5 or by a sensor (not shown). When this is detected, the conveyance of the sheet-shaped material S is stopped via the control device 7. When the conveyance of the sheet-shaped material S is stopped, the cutter 3a is lowered by the control signal from the control device 7 and cuts into the central portion of the sheet-shaped material S, and the two cutters 3a are respectively linear in the width direction of the sheet-shaped material S. Of the sheet-like material S along the direction of the steel wire by cutting off the cutting edge angle θ ₀
Disconnect with. When the cutting is completed, the cutter 3a rises,
The two separated cutters 3a return to the central portion and stand by for the next cutting.

When the sheet material S is cut, the take-up belt conveyor device is activated to take the cut sheet material S. When the cut sheet material S is taken up by the take-up belt conveyor device, the belt conveyor device 2 and the feeding belt conveyor device are actuated again, and the sheet material S moves on the conveyor belt 2a on the sensors SA, SB.
Is transported below. Then, the above-described steps are repeated so that the traveling angle of the cutter 3a is always corrected to the cutting edge angle.

In this way, the control device 7 calculates the angle of the cutting edge with respect to the longitudinal direction of the sheet material S, and the traveling angle of the cutter 3a is changed to the calculated cutting edge angle θ ₀ so that the sheet material S is constantly processed. Since the next cutting part of is cut,
An angle change (dimension change) occurs slightly in the sheet material S while the sheet material S is wound up on a drum and stocked, or while being unwound during conveyance in a green tire forming process. However, the parallelism between the cut edges of the sheet-shaped material S cut into a predetermined length does not always exceed the allowable range.

[0026]

The present invention is configured as described above, calculates the angle of the cut end of the conveyed sheet material, and cuts the next cut portion of the sheet material at the calculated angle. Even if there is a slight change in the angle of the sheet-shaped material while it is being wound and stocked on a drum or during unwinding when it is conveyed to the green tire molding process, the length of the sheet-shaped material remains The parallelism between the cut ends of the cut sheet-shaped material can be kept within an allowable range at all times, and the uniformity of the tire after vulcanization molding can be kept good. Further, since the occurrence of cutting mistakes in the sheet-shaped material is prevented, there is an effect that it is not necessary to monitor the cutting mistakes and the work of the operator can be facilitated.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing an example of a sheet material cutting device according to the present invention.

FIG. 2 is a partial schematic explanatory view of a sheet material cutting device according to the present invention.

FIG. 3 is a block diagram showing a control device of an embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a principle of calculating a cutting edge angle of a sheet-shaped material by a calculation unit of a control device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Cutting device 2 Belt conveyor device 2a Conveyor belt 3 Cutting means 3a Cutter 5 Feed amount detection device 6 Angle detection device 7 Control device 8 Angle change device S Sheet material SA, SB sensor

Claims (2)

[Claims] 1. A sheet for cutting a sheet-shaped material conveyed by a conveyor belt to a predetermined length along the width direction of the sheet-shaped material by a cutter provided at a cutting position in the middle of the conveyor belt in the transfer direction. A method of cutting a sheet-shaped material, wherein when a conveyor belt is activated by starting a conveyor belt from a cutting position of the sheet-shaped material, a cut end of the sheet-shaped material is a width direction of the conveyor belt from the time of starting the conveyor belt. Up to the detection by the two sensors installed in, the two sensors and the feed amount detection device detect the respective signals, and the detection signals are input to the angle measuring means to be detected by the sensor from the cutting position. Up to the movement amount of each sheet, calculate the cutting edge angle of the sheet-shaped material based on the difference in the movement amount, and make it the calculated angle. A method for cutting a sheet-shaped material, wherein the traveling angle of the cutter is changed through an angle changing device to cut the next cutting portion of the sheet-shaped material. 2. A cutting device for sheet material, comprising a cutter capable of traveling in a width direction of a sheet material conveyed on a conveyor belt and having a traveling angle changeable, above the conveyor belt, Also, two sensors installed on the delivery side of the cutter for detecting the cutting edge of the sheet-shaped material, a feed amount detection device for detecting the feed amount of the sheet-shaped material, and inputs from the sensor and the feed amount detection device. A control having an angle measuring means for calculating the amount of movement from the two cutting positions of the cut end of the sheet-shaped material to the sensor based on the signal and calculating the cut-end angle of the sheet-shaped material based on the difference between the movement amounts. Sheet-like material provided with a device and an angle changing device for changing the traveling angle of the cutter based on an output signal corresponding to a value calculated by the angle measuring means. Charge cutting device.