JPH0698588B2 - How to cut strip material - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting method for cutting a strip-shaped material reinforced by a cord.

2. Description of the Related Art Conventionally, as a method for cutting the band-shaped material as described above,
After making a cut on one side end of the band-shaped material by a knife-shaped cutter, the cutter is moved straight along the cord to the other side end to cut the entire width of the band-shaped material. However, such a method may damage the cutter when the cutter hits a steel cord, for example, when making a break, and if the traveling direction of the cutter and the extending direction of the cord are different, There is a problem that the cord pushes the cord to largely bend and deform the band-shaped material. In order to solve such problems,
For example, a cutting method as described in JP-A-60-94297 has been proposed. In this method, first, a knife-shaped first cutter is moved along a cord to cut from the middle of the strip-shaped material to one side end to form a cut, and then a knife-shaped second cutter is cut into the cut. After guiding, the remaining portion is cut by moving straight along the cord from the cut end to the other end.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in such a method, since the second cutter has to be accurately guided into the cut formed by the first cutter, it is difficult to control the second cutter, and two cutters are required. Therefore, there is a problem that the structure of the entire cutting device becomes complicated and expensive.

Means for Solving the Problems These problems are caused by cutting a part of the strip-shaped material reinforced by the cord in the width direction by advancing the cutter straight along the cord to one end. After that, the problem can be solved by moving the cutter backward along the cutting locus to the other side end and cutting the rest of the strip-shaped material.

Action First, the cutter is moved straight along the cord from the middle of the strip-shaped material to one side end to partially cut the strip-shaped material. Next, the cutter is moved backward from the one end to the other end of the strip-shaped material along the locus at the time of cutting to cut the remaining portion of the strip-shaped material. At this time, since the same cutter is made to move straight and reverse, it is easy to match the trajectories during both movements, and as a result, the strip-shaped material can be cut without forming a step. Moreover, since only one cutter is required, the structure is simple and can be manufactured at low cost.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numerals 1 and 2 denote a pair of vertical frames mounted on a base 3. The frames 1 and 2 extend perpendicularly to the plane of the paper, and conveyor belts are provided at the front and rear ends thereof, respectively. A horizontal roller (not shown) for driving and driving 4 is supported. A belt-shaped material 5 such as a carcass ply is conveyed by the conveyor belt 4 in a direction perpendicular to the paper surface. The belt-shaped material 5 is reinforced by a large number of cords 6 inclined at a predetermined angle with respect to the longitudinal direction. Reference numeral 7 denotes a pair of linear guide rods whose both ends are fixed to the frames 1 and 2 above the band-shaped material 5, and these guide rods 7 are horizontally arranged and parallel to the cord 6. A movable frame 8 is reciprocally supported by the guide rod 7. A forward / reverse rotatable motor 11 having a sprocket 10 fixed to a rotating shaft 9 is mounted on the frame 1, while a sprocket 13 is rotatably supported on a frame 2 via a support 12. There is. A chain 14 is stretched between the sprockets 10 and 13, and the chain 14 is connected to a bracket 15 fixed to the movable frame 8. As a result, when the motor 11 operates, the movable frame 8 reciprocates along the cord 6 of the band-shaped material 5 while being guided by the guide rod 7. The movable frame 8 has an arm 17 through a pin 16
The base end of the rotary cutter 18 is rotatably connected, and a blade is formed on the outer periphery of the arm 17 at the front end thereof, and a rotary cutter 18 for cutting the strip-shaped material 5 in a disc shape is rotatably supported. Reference numeral 20 is a cylinder connected to the movable frame 8. The tip of the piston rod 21 of the cylinder 20 is connected to the arm 17. When the cylinder 20 operates, the arm 17 swings, and the rotary cutter 18 approaches or separates from the strip-shaped material 5. Support blocks 25 and 26 are fixed to the frames 1 and 2 immediately below the guide rod 7, and the belt-shaped material 5 and the conveyor belt 4 are attached to these support blocks 25 and 26.
Both ends of an anvil 27 which is interposed between and are parallel to the guide rod 7 are fixed. Reference numeral 28 is a sensor attached to the lower portion of the movable frame 8, and the sensor 28 is arranged on one side of the rotary cutter 18 and is spaced apart therefrom by a predetermined distance. The sensor 28 detects the widthwise edge of the strip-shaped material 5.

Next, the operation of the embodiment of the present invention will be described.

First, the belt-shaped material 5 is conveyed in the longitudinal direction by the conveyor belt 4, and when the portion of the belt-shaped material 5 to be cut reaches just below the guide rod 7, the traveling of the conveyor belt 4 is stopped. At this time, the movable frame 8 is on standby on one side of the strip-shaped material 5 apart from the strip-shaped material 5, as shown in FIG. Next, when the motor 11 is rotated in the reverse direction to drive the chain 14, the movable frame 8 moves to the other side together with the rotary cutter 18. At this time, the rotary cutter
In No. 18, the piston rod 21 of the cylinder 20 is retracted, so that it waits at the upper limit, and as a result, the band-shaped material 5 is not cut. The sensor 28 is connected to the one end 5a of the strip-shaped material 5.
When the detection is made, the movable frame 8 stops moving. At this time, since the sensor 28 is arranged on one side of the rotary cutter 18 at a predetermined distance from the rotary cutter 18 as described above, the rotary cutter 18 passes through the one end 5a of the strip-shaped material 5 and the one end 5a. To the other side at a predetermined distance from the strip-shaped material 5 to just above the widthwise middle of the strip-shaped material 5. Next, the piston rod 21 of the cylinder 20 is projected to swing the arm 17 downward, and the rotary cutter 18 is cut in the middle of the band-shaped material 5 as shown in FIG. 2B to start cutting. At this time, even if the rotary cutter 18 hits the cord 6, since the rotary cutter 18 has a disc shape, the cord 6
It won't slip or break. Next, the motor 11
And rotate the rotary cutter 18 to one end 5a of the strip-shaped material 5
Continue straight along Code 6. As a result, the rotary cutter 18 cooperates with the ambin 27 to partially cut the strip-shaped material 5 in the width direction from the cutting start point P to the one end 5a to form a cut end. Here, since the rotary cutter 18 is used for cutting, even if the rotary cutter 18 hits the cord 6 during cutting, the rotary cutter 18 continues to cut while pushing the cord 6 separately. 18, Code 6 will not be damaged. The state at this time is shown in FIG. Next, the motor 11 is reversely rotated, and the rotary cutter 18 is moved backward toward the other end 5b of the strip-shaped material 5. At this time, the movable frame 8 is moved to the guide rod 7 as in the case of the straight traveling.
Since it moves while being guided by, the rotary cutter 18
The locus of is the same as the cutting locus. For this reason, the rotary cutter 18 first passes while accurately tracing the inside of the cut formed by the cutting, and then the cutting start point P.
The cutting of the strip-shaped material 5 is restarted from the time when the strip-shaped material 5 has passed. Then, when the rotary cutter 18 reaches the other end 5b of the strip-shaped material 5 as shown in FIG. 2D, the remaining portion between the cutting start point P and the other end 5b is cut. Next, the rotary cutter 18 is lifted and then moved toward the one end 5a to return to the desired state. In this way, since one rotary cutter 18 is moved straight and backward to cut the strip-shaped material 5, it is easy to make the trajectories of the rotary cutter 18 the same in both cases, and the structure is Is easy and cheap.

In the above-described embodiment, the sensor 28 is the strip-shaped material 5.
The cutting is started at the position where the one side end 5a is detected, but in the present invention, the cutting start position may be an arbitrary position in the widthwise direction of the strip-shaped material 5. In this case, for example, the sensor
After detecting 28, the movable frame 8 may be moved to one side or the other side by a predetermined distance.

EFFECTS OF THE INVENTION As described above, according to the present invention, it is possible to easily match the trajectories of the cutter when cutting straight and backward, and to simplify the structure and reduce the cost.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, and FIGS. 2 (a) to (d) are explanatory views for explaining the operation. 5 …… Strip material, 5a …… One end 5b …… Other end, 6 …… Cord 18 …… Cutter

Claims (1)

[Claims] 1. A cord is reinforced along the cord from a midpoint of the strip-shaped material to a straight end to partially cut the strip-shaped material in the width direction, and then the cutter is cut along the cutting locus. A method for cutting a strip-shaped material, characterized in that the remaining portion of the strip-shaped material is cut backward by moving it to the other end.