JPH089157B2 - Cutting device for rubber sheet material with suede cord - Google Patents

Description

TECHNICAL FIELD The present invention relates to cutting of a rubber sheet material with a blind cord. Conventional technology As a cutting device for starting the rubber sheet material with a blind cord from the end, the cutting range of the rubber sheet material with a blind cord. The entire length of the sheet is held down by the holding plate.The cutter with the blade formed at the lower part of the obtuse angle toward the cutting direction of the electric heating type that is electrically heated runs along the guide groove while sliding the rubber sheet material with the suede cord while sliding. It is a device for cutting.

Problems to be Solved by the Invention However, in such a device, the presser plate presses the rubber sheet material with the interlocking cord over the entire length of the cutting range. It will be difficult to peel off if they adhere to both sides over the entire length of the cutting range. Also, if the blind cord is placed directly above the guide groove or so as to cross it, the blind cord is pressed by the holding plate and there is no escape, so the cutter cuts the blind cord or cuts the end of cutting. To do. Further, since the cutter runs in the guide groove while pressing the rubber sheet material containing the interlocking cord, rubber scraps are clogged in the guide groove, and the cutter comes off the guide groove, and the movement and sharpness of the cutter deteriorate.

Means for Solving Problems Such problems are caused when cutting the rubber sheet material with the interlocking cord in the cutting traveling direction of the cutter.
A heating type cutter that has an inclined surface (θ) with an acute angle of 60 degrees or less and the tip advances, and a blade is attached to this inclined surface and the tip of the blade is arranged at an acute angle, and over the entire length of the cutting range. A travel means for running by inserting the tip of the blade obliquely arranged along the provided guide groove into the guide groove, and the cutting start side end of the rubber sheet material with the blind cord sandwiching the guide groove. Therefore, it is equipped with a lifting plate lifting means for pressing or releasing with a spacing greater than the spacing between cords, and a rotating means for the entire cutting device having a rotation center at the center of the guide groove on the cutting start side. The problem can be solved by using a cutting device for the rubber sheet material containing the interlocking cord. It is preferable that the inclined surface (θ) referred to here has an acute angle of 30 to 60 degrees in the cutting traveling direction of the cutter.

Action As shown in Fig. 4, the cutting direction of the cutter is aligned with the extending direction of the interlocking cord. The end of the rubber sheet material with the interlocking cord on the cutting start side is pressed by the presser plate, and the cutting tool is in the cutting direction. The blade has a sharp angle (θ) of 60 ° or less, preferably 30 °, and is advanced toward the cutting direction of the cutter to scoop up the edge of the rubber sheet material with a combed cord. A tension is added to this end to remove the blind cord with high strength and high resistance, and cut into the weak rubber part. Since there is no presser plate in the cutting area from this point onward, it is in a state of being floated by the cutter, so that the blind cord moves along the cutter and does not cut the blind cord and cuts the entire length without clogging the guide groove. Further, since the presser is only a part of the cutting start portion, when the presser is released after cutting, the cut rubber sheet material with the interlocking cord is taken out without adhering to the anvil and the presser plate. Incidentally, in FIG. 4, the whole is in a cutting start state, A is a rubber sheet material with a blind cord, A1 is a tension acting portion of A, B is a cutter, B1 is a blade portion, C is an anvil, D is a guide groove, and E is E. The pressing plate, F indicates the cutting direction of the cutter, and θ indicates the inclination angle of the blade.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, reference numeral 1 is a frame attached to a servicer 2 so as to be rotatable via a pin joint 3, and a geared motor 8 is attached to one end of the frame 1. A belt wheel 9 is fixed to the output shaft of the geared motor, and a frame 1 is provided via a timing belt 10.
Is connected to a belt wheel 11 rotatably attached to a fitting 12 at the other end thereof. A bracket 14 is fixed to an upper portion of the timing belt 10 near the belt wheel 11, and the other end of the bracket 14 is attached to a carrier 13 which is in contact with a guide rail 20 attached to the frame 1 at a guide groove. An L-shaped metal fitting 15 is attached to the lower left part of the gear rear 13 so as to be rotatable, and a cutter 16 is attached to the lower end of the L-shaped metal fitting 15 so as to be removable. Therefore, the cutter 16 is attached to the timing belt 10 connected to the geared motor 8 via the bracket 14 and the carrier 13 as a whole, and constitutes a traveling means of the cutter. As shown in FIG. 3, the cutter 16 is fixed to the L-shaped metal fitting 15 serving as a mounting portion with bolts and nuts. A rod-shaped heater 19 is attached to the L-shaped metal fitting 15 for heating the cutter 16. Becomes The cylinder 17 is attached to the carrier 13 so that the rod portion of the cylinder 17 is in contact with the upper side surface of the L-shaped metal fitting 15 to constitute a cutter splashing means. A metal fitting 18 is attached to the upper part of the carrier 13 and a sensor is provided with a certain gap above the metal fitting 18 so that the cutter 16 is at the traveling start position and the traveling end position.
21-1 and 21-2 are fixed to the upper surface of the frame 1.
An anvil 4 having a guide groove 5 as a passage for the cutter 16 is attached to the lower portion of the frame 1 via a spacer 6. The lower surface of the anvil 4 is rotatably placed on the upper surface of the servicer 2 around the pin joint 3 and is fixed by a wing bolt 7. Cylinder 23 fixed to the anvil 4 with the holding plate 22 sandwiching the guide groove 5 on the cutting start side.
It is fixed on the rod. A guide pin 24 is attached to the holding plate 22 so that the cylinder 23 and the anvil 4 are
An elevating means for the pressing plate 22 that presses the end portion of the upper rubber sheet material A with the interlocking cord is configured.

Next, the operation of the embodiment of the present invention will be described.
In advance, the frame 1 is rotated around the pin joint 3 and adjusted in the direction of the guide groove 5 so that the extending direction of the interlocking cord of the rubber sheet material A with interlocking cords is adjusted, and the anvil 4 is attached to the servicer 2 as a butterfly bolt. Stop at 7.
Further, the rod-shaped heater 19 is turned on and the cutter 16 is heated to a predetermined temperature to complete the preparation. A rubber sheet material A with a continuous cord in a lengthwise direction of a constant width is fed by a conveyor (not shown) from the carry-in side 26 to the anvil 4 by a predetermined length, and the cylinder 23 operates to lower the presser plate 22. Press the edge of the rubber sheet material A with the blind cord. The geared motor 8 operates in the forward rotation direction, and the cutter 16 placed at the traveling start position travels in the guide groove. The edge of the rubber sheet material A with the interlocking cord is scooped up by the blade edge forming the inclination angle θ of the cutter 16. The tension is added to the rubber sheet material A with cords in the gap of 22 and the cutter 16 cuts into the rubber portion with weak strength between the cords and cuts along the guide groove 5 to cut the rubber sheet material with cords A.
It passes through the other end and travels to the position of the sensor 21-2, the geared motor 8 stops by the detection of the sensor 21-2, and at the same time, the cylinder 23 is activated and the presser plate 22 is lifted to release the presser and cut the blind cord. The rubber sheet material is taken out from the anvil 4 and sent to the next molding step. Further, at the same time, the cylinder 17 is actuated to repel the tip of the cutter 16 upward from the guide groove 5, and then the geared motor 8 is actuated in the reverse direction so that the cutter 16 is propelled upward while traveling and detected by the sensor 21-1. Stop and return to the starting position. Next, a continuous rubber sheet material A with interlocking cords is fed onto the anvil 4 by a predetermined length by a conveyor (not shown). The rubber sheet material A with a drooping cord is cut by the same means as described above.

In the present invention, the proximity switch is provided at the beginning and end of each operation including the operation of loading and unloading the material to be cut.
All the operations may be performed automatically by forming an operation circuit so that a series of operations are detected by a sensor such as a limit switch.

Advantages of the invention Rubbing a rubber sheet material with a sliding cord into the rubber part while scooping up the floating material and cutting into the rubber part. It cuts along the sliding cord. Is improved.
In addition, since it floats and cuts, there is no clogging of rubber debris in the guide groove, and the movement of the cutter is good and the sharpness is good. Further, since the presser is only a part, it is easy to take out the rubber sheet material with the interlocking cord without adhering to the presser plate and the anvil.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a plan view, FIG. 3 is a side view of a cutter attached, and FIG. 4 is a cutting start state diagram for explaining the operation. 4 ... Anvil 16 ... Cutter 22 ... Holding plate A ... Rubber sheet material with interlocking cord θ ... Cutter cutting The blade angle with the tip advanced in the running direction

Claims (2)

[Claims] 1. When cutting a rubber sheet material containing a blind cord, an inclined surface having a forward end with an acute angle of 60 degrees or less is provided in the cutting traveling direction of the cutter, and a blade is attached to the inclined surface. A heating type cutter in which the tip of the blade is inclined at an acute angle, and a traveling means for running by inserting the tip of the blade inclined at the acute angle into the guide groove along a guide groove provided over the entire length of the cutting range The edge of the rubber sheet material with the blind cord on the cutting start side is sandwiched by the guide groove. A device for cutting a rubber sheet material containing a cord, comprising: a rotating means for the entire cutting device having a center of rotation. 2. The cutting of the corded rubber sheet material according to claim 1, wherein the inclined surface is an inclined surface having a forward end having an acute angle of 30 to 60 degrees in the cutting traveling direction of the cutter. apparatus.