JPS5848318B2 - Cylindrical body cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cutting device that sequentially cuts a cylindrical body such as a paper tube into a predetermined width.

As shown in FIGS. 5 and 6, this type of cutting device moves the slide table 2 intermittently parallel to the rotating cylindrical body 9, and cuts the cutting blade 3 on the slide table 2 every time the slide table 2 stops. is pressed against the cylindrical body 9 and cut.

The intermittent drive device for the slide table is equipped with a drive shaft 4 that reciprocates in a straight line parallel to the transition path of the slide table 2.
is provided with a pair of gripping claws 5, 5 which are removable from the shaft 4.

When the drive shaft 4 moves forward, the gripping claws 5, 5 engage with the shaft 4 and move the slide base 2 forward together with the shaft 4. When the drive shaft 4 retreats, the gripping claws 5, 5 engage with the shaft 4. Leave.

In this way, the slide base 2 moves forward by the stroke of the drive shaft 4 for each reciprocation of the drive shaft 4.

However, in the cutting device described above, when the gripper 5 is released from the shaft 4, the slide 2 is free to move on the guide member 12, 12.

If the cutting blade 3 is pressed against the rotating cylindrical body 9 in this state, the slide table will vibrate, making it impossible to perform highly accurate cutting.

Therefore, until the cutting blade 3 advances toward the cylindrical body 9 and returns to its original position after cutting, the gripping claws 5 and the drive shaft 4 are maintained in a state of engagement with the slide base. 2 and the drive shaft 4 are fixed to prevent vibration of the slide base 2.

For this reason, after the drive shaft 4 is advanced, the cutting blade 3 has to make one reciprocation and then the drive shaft 4 must be retreated. There was a lot of waste and efficiency was poor.

Furthermore, when the drive shaft 4 is retracted, the slide base 2 is in a free state, so by increasing the weight of the slide base 2 or by tightly engaging the slide base 2 and the guide member 12, The device must be designed so that the frictional resistance between the slide table 2 and the guide member 12 is increased so that the slide table 2 does not move even if the device vibrates or the operator contacts the slide table 2 with some force.

In this way, if the frictional resistance between the slide table 2 and the guide member 12 is large, the sliding surface will wear out early, which will have a considerable effect on cutting accuracy.

The present invention makes it possible to immediately retract the drive shaft after advancing the drive shaft by disposing a special clamp piece on the slide base separately from the gripping claw, thereby reducing the time required for intermittent movement of the slide base. To provide a cutting device which can eliminate waste and greatly improve cutting efficiency, and which does not cause troubles due to sudden movement of the slide table even if the frictional resistance between the slide table and a guide member is small. With the goal.

The present invention will be explained in detail based on the embodiments shown in the drawings below.

The slide base 2 that slides on the machine base 1 is attached to both side walls i of the machine base 1.
A pair of rail-shaped parallel guide members 12 provided on i and ii
, 12 via linear motion bearings 13, 13.

A cutting blade mount 31 that rotatably supports a circular cutting blade 3 is disposed on the top surface of the slide 2 so as to be slidable perpendicular to the moving direction of the slide 2, and the mount 31 is moved by a hydraulic cylinder 32. Driven back and forth.

The intermittent drive device 40 that drives the slide table 2 intermittently includes a drive shaft 4 having a hexagonal cross section that reciprocates linearly between the side walls 11 and 11 of the slide table 2 in parallel with the transition path of the slide table 2; It is comprised of a pair of gripping claws 5, 5 disposed opposite to each other with the drive shaft 4 sandwiched between them on the lower surface.

One end of the drive shaft 4 is formed into a nine-ring shape and is attached to the front wall 14 of the machine base 1.
The other end is connected to the piston rod 43 of the hydraulic cylinder 42 via a compression ring 16.

The drive shaft 4 can move by the distance 45 between the threaded cylinder 15 and the stepped portion 44 of the drive shaft 4 when the piston rod 43 is retracted, so the stroke of the drive shaft 40 can be adjusted by tightening or loosening the threaded cylinder 15. Can be adjusted freely.

The gripping claws 5, 5 are slidably fitted into a support frame 41 attached to the lower surface of the slide base 2 so as to be able to approach and separate from each other.
A groove portion 51 is formed on the surface of each claw 5 facing the side walls 11, 11 of the machine base 1, the groove portion 51 being shallower on the upper side and deeper on the lower side.

A hydraulic cylinder 52 is attached to the lower surface of the support frame 41, a piston rod 53 of the cylinder 52 is slidably penetrated through the support frame 41, and a U-shaped support plate 54 is provided protruding from the tip of the rod.

Rollers 55, 55 are pivotally fixed to both ends of the support plate 540, and the rollers 55, ? 5 to the inclined bottom surface of the groove 51 of the gripping claw 5.

When the piston rod 53 is protruded, the rollers 55, 55 rise, and at this time, the gripping claws 5, 5 are pressed toward each other and grip the drive shaft 4.

When the piston rod 53 is retracted, the gripping claw 5,
5 move away from each other and release their grip on the drive shaft 4.

A hydraulic or pneumatic cylinder 6 is provided at one end of the slide base 2 with a piston rod 61 facing toward the machine base 1, and a clamp piece 62 made of hard rubber or the like is attached to the tip of the piston rod 61.

The cylinder device 6 has the function of clamping the slide base 2 by pressing the clamp piece 62 against the machine base 1 or a fixed object on the machine base 1, and the piston rod 610 has a stroke of 1.
wIt is sufficient, and if this stroke is too thick, problems of noise and vibration will occur due to collision between the clamp piece 62 and the mating member.

The tip of the piston rod 61 may be directly engaged with the machine stand 1 or a fixed object on the machine stand 1, that is, the tip of the piston rod 61 may also serve as the clamp piece 62.

A chain 21 is stretched endlessly in the machine base 1 in the direction of movement of the slide base 2, and the chain 21 and the slide base 2 are connected by a connecting member 22.

The chain 21 is connected to the motor (
Both are connected to the slide table 2 (not shown) as described below.
When the machine reaches the final forward end of the machine platform 1, the slide platform 2 is quickly returned to the starting position at the rear of the machine platform.

A support shaft 7 that supports the cylindrical body 9 to be cut is provided at a position facing the cutting blade 3.

A plurality of the support shafts 7 are arranged at equal intervals on a mounting base 71 which rotates in a plane perpendicular to the direction of the support shaft 7 at the rear of the machine base 1 on a circle concentric with the rotation center of the base.

A rotating device 8 is provided at the front of the machine 1 to detachably grip the end of the cylindrical body 9 fitted onto the support shaft 7 and rotate the cylindrical body 9 .

In this embodiment, a current is passed through the support shaft 7 and the cutting blade 3, and when the cutting blade 3 contacts the support shaft 7, the current flows and sends a signal to the cylinder device 32 of the cutting blade 3 to pull back the piston rond 33. The cutting blade 3 is separated from the support shaft 7.

The sequence of operation of the cutting device is then determined, each operation being controlled by a suitably provided detection means (not shown) such as a lift switch.

When the drive shaft 4 moves forward (in the direction of arrow A), the gripping claws 5, 5 of the slide base 2 grip the drive shaft 4, and the slide base 2 holds the shaft 4.
move forward together.

When the drive shaft 4 moves forward by one pinch, the clamping cylinder 6 of the slide base 2 immediately operates to press the clamp piece 62 against the machine base 1, and the slide base 2 is fixed to the machine base 1.

At the same time, the cylinder 32 of the cutting blade 3 operates to move the cutting blade 3,
Press against the rotating cylindrical body 9.

The gripping claws 5, 5 release the drive shaft 4 with a momentary delay from the clamping of the slide base 2 by the clamp piece 62, and at the same time, the drive shaft 4 moves backward (in the direction of arrow B).

In other words, since the cutting blade 3 is pressed against the cylindrical body 9 while the slide table 2 is fixed to the machine table 1 by the clamp piece 62, the slide table 2 and therefore the cutting blade 3 do not chatter, resulting in high precision. Can be cut.

In addition, since the drive shaft 4 is retracted while the cutting blade 3 is biting into the cylindrical body 9, the drive shaft 4 is retracted until the cutting is completed and the cutting blade 3 returns to its original position, as in the conventional case. There is no need to stop the drive shaft 4, and no time is wasted when retracting the drive shaft 4.

When the cutting blade 3 penetrates through the thickness of the cylindrical body 9 and comes into contact with the support shaft 7, the cylinder device 32 is activated and the cutting blade 3 returns to its original position.

In this state, the gripping claws 5, 5 grip the drive shaft 4, and after an instant, the cylinder 6 of the clamp piece 62 operates to release the clamp piece 62 from the machine base 1.

In this state, the drive shaft 4 moves forward again and repeats the above operation to sequentially cut the cylindrical body 9 into ring shapes.

When all the cutting of the cylindrical body 9 is completed and the slide stand 2 reaches the final forward end, a return chain 21 is activated to quickly return the slide stand 2 to the starting position at the rear of the machine stand 1.

While the cylindrical body 9 is being cut, the next cylindrical body is set on the other vacant support shaft 1, and the mounting table 11 is reversed to replace the cylindrical body, thereby reducing the time required to replace the cylindrical body. There is no waste.

In this embodiment, the instantaneous delay in switching the operation of the gripping claws 5, 5 and the clamp piece 62 is set to about 0.1 seconds by incorporating a timer into the electric circuit that controls the cylinder. There is.

Therefore, when the cutting device is operated, the sliding joint 2 is closed to the gripping claw 5.
, 5 or the clamp piece 62 to the drive shaft 4 or the machine base 1, there is no risk of the slide base 2 moving unexpectedly even if the device vibrates or the operator touches the slide base 2 with some force. Moreover, since the slide table 2 itself does not cause chatter, it has been confirmed that the cylindrical body 9 can be cut with an accuracy of ~100 mm.

Moreover, since the slide base 2 is engaged with the guide member 12 via the linear motion bearing 13, the slide base 2 and the guide member 12
The frictional resistance between the guide member 12 and the guide member 12 is extremely small, and the guide member 12 will not wear out prematurely and cause play.

As described above, in the present invention, while the cutting blade 3 is biting into the cylindrical body 9, the slide table 2 can be fixedly locked on the machine table 1 by the clamp piece 62, so that the slide table 2 can be driven intermittently. The drive shaft 4 can immediately move backward after moving forward, and no time is wasted in the reciprocating movement of the drive shaft 4, that is, the intermittent movement of the slide table 2. There is no need to completely stop the movement of the drive shaft 4 during one reciprocation of the drive shaft 3, which eliminates wasted time and greatly improves cutting efficiency.

Furthermore, since the slide base 2 is always clamped between the clamp piece 62 and the gripping claw 5, it is not possible to freely walk on the guide member 12, and the friction between the slide base 2 and the guide member 12 is reduced. Even if the resistance is reduced, the slide base 2 will not move unexpectedly due to vibration or the like.

Therefore, it has excellent effects such as reducing the frictional resistance between the slide base 2 and the guide member 12, thereby extending the life of the guide member 12, and allowing even a small output cylinder to drive the drive shaft 4 and therefore the slide base 2.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the cutting device, Fig. 2 is a side view of the same as above, Fig. 3 is a sectional view taken along line 1-III in Fig. 1, and Fig. 4 is a sectional view of the gripping claw gripping the drive shaft. FIG. 5 is a plan view of the main part of the conventional example, and FIG. 6 is a sectional view of the same. 2...Slide stand, 3...Cutting blade, 4
... Drive shaft, 62 ... Clamp piece, 6
······Cylinder.

Claims (1)

[Claims] 1. A slide base 2 equipped with a drive shaft 4 that repeats linear reciprocating motion in the longitudinal direction of the machine and gripping claws 5, 5 that can be held on the drive shaft 4 is attached to the drive shaft 4. A cutting blade 3 is disposed on the slide table 2 so as to be movable in parallel with the direction of movement of the slide table 2, and a cutting blade 3 is disposed on the slide table 2 so as to be movable in a reciprocating manner perpendicular to the moving direction of the slide table 2. In a device that presses the cutting blade 3 against the cylindrical body 9 to cut the cylindrical body 9 every time the slide table 2 moves forward one pitch with respect to the cylindrical body 9 to be processed, the slide table 2 has a machine base or is a clamp piece 62 that can be attached to and detached from a fixed object on the machine base.
, and the clamp piece 62 is connected to a cylinder 6 which is switched and operated each time the drive shaft 4 is switched forward or backward. 2. The cutting device for a cylindrical body according to claim 1, wherein the tip of the piston rod 61 of the cylinder 6 also serves as a clamp piece 62. 3. The cutting device for a cylindrical body according to claim 1 or 2, wherein the Rarride table 2 is engaged with the guide member 12 via a linear motion bearing 13.