JPH02223431A - Angle changing method of bias cutter - Google Patents

Abstract

PURPOSE:To shorten an arrangement changing period of time and improve cutting accuracy after a change of an angle, by a method wherein at the time of the change of the cutting angle of a rubber sheet material, the same is moved backward down to a fixed position and turned under a state where a tip part side is sucked and held. CONSTITUTION:The tip part Wa of a rubber sheet material W is moved backward by a fixed quantity by sucking and holding the same with a front and rear side material delivery devices 4, 7 under a state where a device is suspended. Then after release of the rubber sheet material Wb from the front side material delivery device 4, the front side material delivery device 4 is shunted to an advancing limit, the tip side part Wa is held through sucking by an auxiliary sucking device 8, turned by a fixed angle along with a turning table 1 and an angle change is performed. After shunting to a stand-by position by releasing the rubber sheet material W by the auxiliary sucking device 8, the rubber sheet material W is sucked and held by the rear side material delivery device 7, The tip of the rubber sheet material W is delivered up to a cutting original position, an odd end quantity Wx of the tip part Wa is delivered by the material delivery devices 4, 7 and cut off by a cutting device not illustrated.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for changing the angle of a bias cutter.
More specifically, the present invention relates to a method for changing the angle of a bias cutter that automatically and efficiently changes the angle of a rubber-coated steel cord material without causing wrinkles or the like in the material, thereby improving cutting accuracy.

[Conventional technology]

Conventionally, setup changes associated with changing the cutting angle of rubber sheet materials such as rubber-coated steel cord materials have been carried out, for example, at the third
As shown in the figure, when changing the angle of rubber sheet material A to rubber sheet material B, the rubber sheet material is not vulcanized, so the rubber sheet material is on the surface of the carry-out conveyor Z or the revolving table (not shown). In close contact.

As a result, the tip of the rubber sheet material B that protrudes from the cutting line Inevitably, a lot of effort and time is required to change the setup, and due to poor material correction, several cuts occur with poor cutting accuracy after changing the angle.

[Problem that the invention seeks to solve]

By the way, when changing the angle of the rubber sheet material, in order to reduce the frictional resistance between the unvulcanized rubber sheet material and the sector-shaped fixed table, air is blown from the surface of the sector-shaped fixed table toward the back side of the rubber sheet material, and the rubber sheet is The angle is changed while the material is floating, but since it is not possible to turn the entire rubber sheet material in a floating state, it is not possible to completely reduce frictional resistance to zero, and the rubber sheet material is As mentioned above, due to the weak lateral rigidity in the unvulcanized state, the tip of the rubber sheet material and the top of the fan-shaped fixing table inevitably become bent, making it necessary to modify the material and solve the various problems mentioned above. I couldn't do it.

[Purpose of the invention]

This invention was devised by focusing on such conventional problems, and automatically performs setup change when changing the angle of the rubber sheet material without bending the tip of the rubber sheet material, thereby reducing setup change time. In addition, it is an object of the present invention to provide a method for changing the angle of a bias cutter that improves cutting accuracy after changing the angle.

[Means to solve the problem]

In order to achieve the above object, when changing the cutting angle of the rubber sheet material, the rubber sheet material is sucked and held by the front material feeding means and retreated by a certain amount, and after releasing the rubber sheet material, the material is fed out. While retracting the means to the forward limit, the auxiliary suction means rotating together with the revolving table suctions and holds the front end side of the rubber sheet material,
The gist is to change the angle by rotating the rubber sheet material together with a rotating table at a predetermined angle.

[Action of the invention]

This invention is configured as described above, and when changing the cutting angle of the rubber sheet material, the rubber sheet material is retreated to a predetermined position and rotated while holding the tip side by suction, so that the tip of the rubber sheet material and the belt conveyor are The friction of the fan-shaped fixed table is almost eliminated, and the angle can be reliably changed without bending the tip of the rubber sheet material.

[Embodiments of the invention]

Hereinafter, the present invention will be described in detail based on the accompanying drawings.

FIG. 1 shows a plan view of the angle changing device, in which 1 is a rotating table on which a rubber sheet material W such as a rubber-coated steel cord material is placed and rotates around a starting point O; 2 is a sector-shaped table fixed to a cutting surface; The fixed table 3 is a conveyor for carrying out the cut rubber sheet material W, and a cutting device (not shown) cuts the rubber sheet material W along the cutting line X-x.

In the vicinity of the above-mentioned cutting line Alternatively, a plurality of suction means 6 such as suction bats are provided to suction and hold the tip surface of the rubber sheet material W, and the configuration is such that it can move forward and backward along the supply direction of the rubber sheet material W and can be raised and lowered in the vertical direction. has been done.

Further, the rotary table 1 is also provided with a rear material delivery means 7 having a similar configuration, and furthermore, on the side of the fan-shaped fixed table 2, a tip side portion wb of the rubber sheet material W whose angle has been changed is provided. An auxiliary suction means 8 is provided for suctioning and holding.

This auxiliary suction means 8 also has the same structure as the above-mentioned front side material delivery means 4 and rear side material delivery means 7, and is configured to rotate at the same time as the turning table 1 and to be able to move up and down in the vertical direction. .

The front material delivery means 4 and the rear material delivery means 7 are fixed by parallel links (not shown), and are moved forward and backward at the same time.

Next, the method of changing the angle of the rubber sheet material W is shown in FIG.
) to FIG. 2(5), the steps will be explained.

FIG. 2(a) shows a state in which the automatic operation is stopped, in which the rubber sheet material W is being cut at a predetermined angle and the device is temporarily stopped as the angle changes. The leading end Wa is sucked and held by the front and rear material delivery means 4 and 7 (FIG. 2(b)L). In this state, the leading end Wa of the rubber sheet material W is retreated by a predetermined amount.

In addition, in the figures of FIG. 2(a) to FIG. 201), 9
The number 10 indicates the conveyor, and the number 10 indicates the carry-in conveyor. As mentioned above, after retracting the tip Wa of the rubber sheet material W by a predetermined amount, the rubber sheet material W is released from the front material delivery means 4, and the front material delivery means 4 is retracted to the forward limit ( Figure 2 (C)).

Next, with the tip side part wb of the rubber sheet material W being suctioned and held by the auxiliary suction means 8, the rubber sheet material W is rotated by a predetermined angle together with the rotating table 1 to change the angle (FIG. 2(d)) ).

At this time, air is blown onto the bottom side of the rubber sheet material W from the surface of the fan-shaped fixed table 2 to keep it floating.

After changing the angle of the rubber sheet material W mentioned above, the auxiliary suction means 8
releases the rubber sheet material W and avoids it to the standby position,
Next, the rubber sheet material W is sucked and held by the rear material delivery means 47, and the leading end of the rubber sheet material W is delivered to the cutting source position (FIG. 2(e)).

From this state, as shown in the second figure (Fig. 2), the leading end W of the rubber sheet material is
The material feeding means 4 calculates the edge length Wx of a by an arithmetic device (not shown) or detects that the tip of the material has been fed forward from the cutting device all the way through.
7, the end length WX of the tip end Wa of the rubber sheet material is sent out and cut by a cutting device (not shown) (see Fig. 2).
6)).

The end length iWx of the cut end portion Wa of the rubber sheet material is
The distribution is conveyor 9. It is discharged to the outside by the carry-in conveyor 10 or the like.

When the above-mentioned preparations for changing the cutting angle of the rubber sheet material W are completed, the automatic one-cycle cutting operation of the rubber sheet material W is continuously performed (FIG. 2(f)).

In this invention, when changing the cutting angle of the rubber sheet material W, by performing the setup change as described above, cutting can be automatically performed in a short time without deforming or bending the tip Wa of the rubber sheet material W. , it is possible to significantly improve work efficiency.

〔Effect of the invention〕

As described above, when changing the cutting angle of the rubber sheet material, the rubber sheet material is sucked and held by the front material delivery means and moved backward by a certain amount, and after releasing the rubber sheet material, the material delivery means is turned off. While retracting to the forward limit, the rubber sheet material is rotated at a predetermined angle together with the rotation table to change the angle while the tip side of the rubber sheet material is suctioned and held by the auxiliary suction means that rotates together with the rotation table. The setup change when changing the angle of the sheet material can be done automatically without deforming or bending the tip of the rubber sheet material, reducing the setup change time and making it more efficient. This has the effect of improving cutting accuracy.

[Brief explanation of the drawing]

Figure 1 is a plan view of the angle changing device, Figures 2 (a) to 2 (color) are explanatory diagrams showing the steps when changing the cutting angle of rubber sheet material, and Figure 3 is a conventional cutting of rubber sheet material. It is an explanatory view at the time of angle change. 1... Swivel table, 2... Fan-shaped fixed table, 3
... Carrying out conveyor, 4... Front side material sending means,
7... Rear side material delivery means, 8... Auxiliary suction means,
X-X... Cutting line, W... Rubber sheet material, Wa.
...Tip of the rubber sheet material, wb...Tip side part of the rubber sheet material.

Claims (1)

[Claims] A bias cutter angle changing method in which rubber sheet material is fed out in predetermined amounts and cut by a cutting device at a cutting position, and when changing the cutting angle, the original fabric side is rotated, when changing the cutting angle of the rubber sheet material, The rubber sheet material is sucked and held by the front material delivery means and moved backward by a certain amount, and after releasing the rubber sheet material, the material delivery means is retracted to the forward limit, while the auxiliary suction means, which rotates together with the revolving table, A method for changing the angle of a bias cutter, characterized in that the angle is changed by rotating the rubber sheet material at a predetermined angle together with a turning table while holding the end side of the rubber sheet material by suction.