JPS6319317B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for cutting a flexible reinforcing cord-containing material, and more specifically, for cutting a flexible reinforcing cord-containing material such as a rubber sheet containing reinforcing cords used as a tire constituent material. The invention relates to an improvement in the method of cutting along the reinforcing cords, and in particular to a method of cutting a material containing flexible reinforcing cords, the reinforcing cords being arranged obliquely with respect to the axis of the material.

Conventionally, when cutting a rubber sheet containing reinforcing cords on a servicer of a tire molding machine, for example, the material transfer conveyor is divided into front and rear units 1 and 2, as shown in Figures 1 and 2. As shown in FIG. 3, a cutter base 23 having a concave groove 24 in the width direction on its upper surface is arranged between the units 1 and 2, and the cutting blade 16- is inserted toward the concave groove 24.
The material 25 is cut by passing through the wires a and 16-b.

However, with this method, the reinforcing cord 26 is arranged at 90 degrees with respect to the axis of the material 25, and although it is fine if the reinforcing cord 26 is cut along this reinforcing cord 26, the reinforcing cord 26 is arranged at an angle with respect to the axis of the material 25. When cutting along this diagonally arranged reinforcing cord 26, it is not only necessary to subdivide the aforementioned front and rear conveyor units 1 and 2 into a large number of narrow conveyor units, but also to cut the reinforcing cord 26. When the angle of the cord 26 is changed, in order to cut the material 25 in accordance with the angle change, a device for moving and setting each of the subdivided conveyor units is required, making the device significantly complicated. There's a problem.

Therefore, in order to solve the above-mentioned problem, a method has been proposed in which an elevator bar 30 having a concave groove 31 in the width direction is arranged on the upper surface of the conveyor 32, as shown in FIG. 4, instead of dividing the conveyor into front and rear parts. However, if the material 25 is thin and highly flexible like the tire constituent material described above, it is difficult to pass over the elevator bar 30, causing frequent troubles such as the material slipping between the elevator bar 30 and the conveyor 32. The current situation is that there are still problems.

The present invention was developed as a result of studies to solve the above-mentioned problems.

Therefore, it is an object of the present invention to superimpose materials in which the reinforcing cords are arranged at right angles to the axis of the material as well as materials in which the reinforcing cords are arranged obliquely to the axis of the material along the reinforcing cords. An object of the present invention is to provide a method for cutting a reinforcing cord-containing material that can be easily cut and has excellent flexibility.

That is, the present invention floats a part to be cut of a material containing a flexible reinforcing cord from the surface of a belt conveyor while both sides of the part to be cut are suctioned by a suction gripping mechanism, and A block with a concave cross section is raised while following the block, and the cutting blade is moved while holding the top and bottom surfaces of both sides of the part to be cut by the block and a suction gripping mechanism that adsorbs both sides of the part to be cut. ,
The gist of this method is to cut the part to be cut along the buried cord.

Hereinafter, the present invention will be explained in detail by way of examples with reference to the drawings.

First, the apparatus directly used for carrying out the method according to the present invention will be described.

5 to 10 show an example of an apparatus for carrying out the present invention, in which FIG. 5 is an explanatory plan view, FIG. 6 is an explanatory view taken along the line C-C in FIG. 5, and FIG. A partially cutaway front view of the vacuum head, Figure 8a is an enlarged side view of the same as above, Figure 8b is an enlarged plan view of the same as above, Figure 9
The figure is an explanatory view taken along the line D--D in FIG.

In this embodiment, the belt conveyor 40 is arranged such that the left and right belt conveyors 40-
A cutter unit 101 is provided above the cutter unit 101 so that the angle α with respect to the axis of the belt conveyor 40 can be adjusted.

This cutter unit 101 is shown in FIGS.
It is constructed as shown in the figure, and 3 is a cutter 16-
In this embodiment, an air cylinder is used as an appropriate driving source for opening and closing the parts a and 16-b from side to side. Also, 4 is the cutter block 7-
This is a pair of guide rods that guide the rods a and 7-b.

Rack rails 5-a and 5-b are provided opposite to a block 6 fixed to the center of the guide rod 4 with a pinion gear 5-c rotatably fixed therebetween.
a, 5-b are cutter blocks 7-a, 7-b
One end of each is fixed. Further, the air cylinder 3 is fixed to a side frame 11. With the above configuration, by supplying air in the direction in which the rod of the air cylinder 3 is extended, the cutter blocks 7-a and 7-b are moved relatively to the center, and by retracting the rod, the cutter blocks 7-a and 7-b are moved relative to each other. You can move left and right.

The cutter blocks 7-a and 7-b have pins 13-a and 13-a that are rotatable and movable up and down.
3-b, and a pair of rotatable rollers 14-a and 14-b are fixed to the upper end thereof. The lower ends of these pins 13-a, 13-b are provided with cutter holders 15-a, 15-b.
is fixed, and each cutter 16-a, 16-b is attached.

17-a and 17-b are plate-type heaters, and when the left and right cutters 16-a and 16-b return, they are placed in pairs on the side plates 10 and 11 in order to store and heat them between them. Fixed. Further, pins 13-1 are attached to the side plates 10, 11 via rollers 14-a, 14-b.
A pair of plates 18-a and 13-b each having a slope at one end are used to pull the plates 18-a and 13-b upward at the standby position.
18-b is fixed.

Cylinders 19-a and 19-b are attached to the center block 6 in the front and back directions (in the material flow direction) for fixing the material 90 so that it does not move when cutting the material. Further, above the center block 6, there is an arm that pushes the pins 13-a, 13-b downward via the rolls 14-a, 14-b when the cutter blocks 7-a, 7-b move toward the center. 22
Rotating air cylinder 2 with -a, 22-b
1-a and 21-b are attached. The front pins 13-a and 13-b are mounted by appropriate means such as a spring plunger so that they do not move up and down under their own weight unless an external force is applied, but are rotatable. When pulled upward by a pair of guide blocks 91 as shown in FIG.
-b is fixed and cannot be rotated. These mechanisms allow the cutter blocks 7-a, 7-
When b approaches the center, cutters 16-a, 16-b
are arranged so that their tips coincide.

In addition, the material holding cylinders 19-a, 19-
Vacuum heads 41-a and 41-b are attached to b through arms 19-c and 19-d. The side frames 10 and 11 are fixed to a base plate 42, and a cylinder pin 43 having a structure such as an air cylinder is fixed to the center of the plate 42. Further, there is a frame 44 below the plate 42, and the cylinder pin 43 is rotatably attached to this frame 44. This frame 44 is attached to an arm 46 via spacer blocks 45-a and 45-b.

With this structure, the cutter unit 101 mounted on the plate 42 is rotated through the cylinder pin 43 at a certain angle α by means of an appropriate rotation and fixing mechanism.
It can be rotated and fixed.

In addition, the vacuum heads 41-a and 41-b are
As shown in FIG. 7, a plurality of elongated holes (slits) 41-c are provided on the bottom surface to adsorb the material 90, and a piping port 4 for vacuum pressure supply is provided at an appropriate position.
7 is provided at one or more locations. Further, on both sides of this vacuum head, there are seal blocks 48 whose position can be adjusted according to the material width. Furthermore, the upper surfaces of the vacuum heads 41-a and 41-b have elongated holes 49 on the left and right sides, and fixing screws 50 are attached to the seal block 48 through these elongated holes. Seal rubber plates 51 are attached to each of the screws 50, and are installed so as to seal the vacuum section of the elongated hole 49, that is, the elongated hole on the side that attracts the material, even when the seal block 48 is moved to its maximum width. ing.

As a result, the section to which the vacuum pressure is applied can be adjusted according to the width of the material, and it becomes possible to effectively and reliably adsorb the material 90.

The cylinder pin 43 is connected to the piston rod 6
0 has a suitable structure that does not rotate with respect to the outer cylinder, and a lower presser block 61 is attached to the tip of the lower presser block 61. This block 61 has a concave shape, and the plate 42 and cylinder pin 43 are fixed. Even if the installation angle of the cutter unit 101 is changed, the vacuum head 41-
a and 41-b.

Next, the operation of the above embodiment will be explained with reference to FIGS. 10a to 10e.

() Material 90 is sent by conveyors 40-a and 40-b and stops at a predetermined cutting position.
(See Figure 10a) () The vacuum heads 41-a, 41-b hit the descending material 90 and adsorb it by the vacuum pressure. (See Figure 10b) () Just before the vacuum heads 41-a and 41-b adsorb the material 90 and rise, the block 61
is raised by the cylinder pin 43, and the material 9 is placed opposite the vacuum heads 41-a and 41-b.
0, and then the vacuum head rises, and the block 61 rises following it. As a result, the material 90 is pulled up from the belt conveyors 40-a and 40-b, creating a space 70. (See Figure 10c) () Cutter 1, which had been moved to the center in advance.
6-b (16-a) is the pin 13-b (13-
a), via roller 14-b (14-a),
The arm attached to the cylinder 21-b (21-a) is pushed downward by the arm 22-b (22-a) and penetrates the material 90, but at this time the pin 13
-b (13-a) is the cutter 16-b (16-
The structure is such that the belt a) does not go down until it hits the belt conveyor 40-b (40-a). With the cutters 16-b and 16-a passing through, the blocks 7-a and 7-b are moved by the cylinder 3, that is, the cutters 16-b and 16-a are moved left and right to cut the material 90. (See Figure 10d) () The material is released from the vacuum heads 41-a and 41-b, and the center block 61 is also pulled downward to complete cutting. (Figure 10e
(See) In short, in this example, as mentioned above,
The vacuum heads 41-a, 41-b, which can adjust the suction section, are lowered to attract the cut portion of the material 90 and float the material 90 upward by a predetermined length by the material transfer conveyor 40. By the material transfer belt conveyor 40
A space 70 is created between the material 90 and the material 90, and then the cutting blades 16-a and 16-b, which are waiting above the part to be cut of the material 90, are lowered downward, and the material 90 is aligned from the center along the cord 90a. By cutting it open from side to side, the material 90 can be cut without cutting the cord 90a. (At this time, the direction of movement of the cutting blade must be aligned in advance with the direction of the cords placed on the material.) This method can also be used for materials containing ordinary fiber cords, as well as for materials containing steel cords. However, in the case of steel cord, it is also possible to use an electromagnet instead of a vacuum head to pull up the material.

Furthermore, in this embodiment described above, the belt conveyor 4
0 was divided into two parts 40-a and 40-b as shown in the figure, and a block 61 was installed in the center to support the material from below.
This is to prevent the material from falling off from the vacuum heads 41-a, 41-b due to the impact when the materials 90 are penetrated by the materials 90, and the adsorption by the vacuum heads 41-a, 41-b is sufficient. Of course, if the system operates reliably, a single belt conveyor may be used and the central block 61 etc. may be omitted.

As described above, the present invention floats a part to be cut of a material containing a flexible reinforcing cord from the surface of a belt conveyor while both sides of the part to be cut are suctioned by a suction gripping mechanism, and A block with a concave cross section is raised from the bottom side while following the block, and the cutting blade is moved while holding the upper and lower surfaces of both sides of the part to be cut by the block and the suction gripping mechanism that adsorbs both sides of the part to be cut. By doing so, the part to be cut is cut along the buried cord, so it can be used not only for materials where the reinforcing cord is placed perpendicular to the axis of the material, but also for materials where the reinforcing cord is inclined to the axis of the material. The placed material can be cut extremely easily along the reinforcing cord, and since the material is cut while being held in position by the suction gripping mechanism, it is possible to cut with high precision. It is particularly effective for cutting flexible strip materials.

[Brief explanation of the drawing]

Figures 1 to 4 show a conventional device, with Figure 1 being an explanatory plan view, Figure 2 being an explanatory view taken along the arrows A-A of Figure 1, and Figure 3 being an explanatory view of Figure 1 B-B. Arrow view explanatory diagram, 4th
The figure is an explanatory cross-sectional view showing another conventional example. 5 to 10 show an example of an apparatus for implementing the present invention, in which FIG. 5 is an explanatory plan view, FIG. 6 is an explanatory view taken along the line C-C in FIG. 5, and FIG. 8a is an enlarged side view of the same as the above, FIG. 8b is an enlarged plan view of the same as the above, FIG. 9 is an explanatory view taken along the line D-D in FIG. 5, and FIGS. 10a to 10 are e is an explanatory diagram of each operation. 16-a, 16-b...cutting blade, 40...belt conveyor, 90...material.

Claims (1)

[Claims] 1. A part to be cut of a material containing a flexible reinforcing cord is floated from the surface of a belt conveyor with both sides of the part to be cut being suctioned by a suction gripping mechanism, and a concave cross-section is By raising the block while following it, and moving the cutting blade while holding the upper and lower surfaces of both sides of the part to be cut by the block and the suction gripping mechanism that adsorbs both sides of the part to be cut, the block is moved to the buried cord. 1. A method for cutting a flexible reinforcing cord-containing material, the method comprising cutting a portion along the line.