JPS5835809B2 - Board cutting method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for longitudinally cutting a rectangular flat metal plate.

Conventionally, in the production of one can, one metal flat plate was
As a device for cutting this into several pieces in parallel, the plate material is fed between disc-shaped blade shafts that rotate inwardly, and the material is cut through the blade edge provided along the circumference of the blade shaft. A rotary shear device, generally called a slitter, that cuts sheets one after another is widely used.

As shown in Fig. 4, this slitter has an upper blade shaft C, 8 attached to the upper rotating shaft A along with rubber rings 2 and 2 of approximately the same size, and a lower blade shaft HO to the lower rotating shaft opening. , E are placed oppositely with their circumferential surfaces in contact with the two circumferential surfaces of the rubber rings.

Due to the frictional force of the rubber ring 2, the tip edge of the fed plate material is rolled into the upper and lower blade rings and cut through each blade edge, and the circumferential speed of the upper and lower blade shafts is This is the 3 breaking speed of the plate material.

By the way, when the above-mentioned plate material is fed between the upper and lower blade wheels, the plate material has a corresponding thickness, so the moment the end surface comes into contact with the circumferential surface of the rotating blade shaft, there is a need to remove this from the blade shaft. In some cases, the edge of the rubber ring is temporarily compressed by the edge of the plate, and then the restoring force of the rubber causes it to rebound and warp, pushing the plate back.

The action of trying to temporarily eject the plate material does not occur equally on the left and right blade axes C, C, H, and H, and the plate material is not necessarily cut into accurate squares.

It is difficult for the left and right blade axes to cut under the same conditions at the same time, and as a result, the cut plate material may have a split on one side of the cut made by the left and right blade axes, or the left and right cuts may be diagonal to the plate material. There is a risk that this may occur.

However, if you continue to forcefully push the plate against the rotation of the blade wheel, the plate will deform and stress will also be placed on the blade axis.

Roughly increasing the rotation of the blade axis will further increase the above-mentioned tendency, which has the disadvantage of restricting the cutting throughput.

In order to solve these drawbacks, the present invention applies an impact pushing force to the supplied required plate material just before its front edge is inserted between the upper and lower blade wheels to forcibly push it between the upper and lower blade wheels. Komi,
Moreover, as soon as the front edge engages between the upper and lower blade rings, this pushing force is eliminated (and the blade axis). It was strained to ensure efficient cutting.

An embodiment of the device according to the present invention will be explained with reference to FIGS. 1 and 2. As with a normal device, the entire device is horizontal (the tip of the base 1 is located here, the upper blade shaft 2 is located, the lower part is The blade shafts 2' are respectively supported through the rotation shafts 3 and 3', and on the side of the base 1 there is a fixed regulating member 4 on one side.
A movable regulating member 4' is attached to the other side, and a series of endless chains 5.5 are arranged in parallel on the base 1, and a feed claw 6 fixed to the endless chain 5 moves the required plate material a to be cut. The blades are pushed and fed into the blade shafts 2, 2'.

7 is a receiving plate laid on the base 1, and 7' is a horizontal rod for preventing the board from jumping up.

The required plate materials a to be cut are intermittently fed one by one onto the base 1 in front of the slitter (via a suction cup of a feeding mechanism (not shown) provided here).

Then, the continuously moving feed claws 6, 6 slide on the receiving plate 7 and cut into several strips between the upper and lower blade shafts 2..., 2'... Blade axis 2...

2'... (Before this meshing, the movable regulating member 4', which is constantly moving perpendicular to this feeding direction, presses against the fixed regulating member 4, and the roller between the two members 4 and 4' is pressed against the fixed regulating member 4. They are sandwiched and positioned.

Up to this point, it is the same as a conventional slitter.

In this invention, in addition to the feed claws 6, 6, auxiliary feed claws 8, 8 which move at high speed are provided on the base 1.

The auxiliary feed claws 8, 8 are provided on the upper surface of a pair of left and right strips 9, 9 that move back and forth with a predetermined stroke along the receiving plate I between the receiving plates 7 on the base 1. Numerous female screw holes 10
They are each formed as a bolt-like member that is screwed into one of the board members, and are positioned by selecting the female threaded hole 10 depending on the length of the board material, and the bolts are inserted into the rear end of the board material. Then, the front end of the plate material is connected to the upper and lower blade shafts 2...
, 2'... The end of the stroke is reached at the same time as it is inserted between the two, and Q can be set so that no further pushing is performed.

That is, as is clear from FIGS. 2 and 3, the feed pawl 6 disposed on the endless chain 5 is constantly moved forward (
The auxiliary feed pawl 8 moves towards the left side of the figure at a speed equal to or slightly lower than the circumferential speed of the blade shaft 2. It is erected on the upper surface of the strip 9 that is fixed at the top end so that its mounting position can be adjusted freely, and the blade shaft 2 has a substantially higher speed than the circumferential speed of the blade shaft 2.
In reality, the plate material a moves back and forth at a moving speed that is two to three times the moving speed of the endless chain 5, and is advanced by the feed pawl 6.
After the rear end Q has caught up, it is rapidly pushed forward and the tip of the plate a is inserted between the upper and lower blade shafts 22' and at the same time it is moved backward.

These auxiliary feed claws 8, 8 and feed claws 6..., 6...
The movable regulating member 4' is driven by a motor 14 installed below the base, as shown in FIG.

In other words, the rotation of the motor 14 is transmitted through the speed reducer 15 to the grooved cam 1.
6. Rotate the drive wheel 1111 to rotate the groove of the grooved cam 16 (
Is this the bottom end? The movable regulating member 4' is moved from side to side via a connecting rod 17 which is pivotally supported on the base at the middle thereof, and the drive wheel 1 is moved from side to side.
111, the endless chain 5 is moved to move the feed pawl 6 forward.

The rotation of the reducer 15 shaft operates the cam mechanism 12 via the reduction gear 18, rotates the shaft 20 at a certain angle via the arm rod 19 connected to it, and rotates the shaft 20 through the rotating rod 13 fixed to the shaft 20. The auxiliary feed claws 8, 8 are designed to reciprocate f times back and forth.

The rotating shafts 3, 3' of the upper and lower blade shafts 2, 2', . is rotated to

In addition to the normal slitter action, the device G allows efficient cutting to be performed using the auxiliary feed pawl 8, which has a constant stroke and is faster than the auxiliary feed pawl 6, which is faster than the feed pawl 6, as described above. It is possible, but in this case,
The speed of the auxiliary feed claw 8 is within the range that generates a moderate impact force (
Q is actually determined by the peripheral speed of the blade shaft, that is, the second part of the feed jaw 6.
Particularly good results were obtained when the amount was increased by ~3 times.

As explained above, the present invention has many advantages, such as being simple in structure, reliable in operation, and being able to be implemented using conventional equipment as is.

[BRIEF DESCRIPTION OF THE DRAWINGS] Figures 1 to 3 are explanatory diagrams showing an embodiment of the device according to the present invention, in which Figure 1 is a plan view, Figure 2 is a side view, and Figure 3 is a side view. FIG. 3 is a perspective view of the power transmission mechanism. FIG. 4 shows an explanatory front view of the slick. 1...Base, 2...Upper blade shaft, 2'.
...Lower blade ring, 5 ... Endless chain, 6
...Feed claw, 8...Auxiliary feed claw, 12
...Cam mechanism, 13...Rotating rod, a.
...-Plate material.

Claims (1)

[Scope of Claims] 1. When cutting square plate materials by feeding them inwardly (between the rotating upper and lower blade wheels), the front edge of the plate material separately reaches the upper and lower blade axes. A method for cutting a plate material characterized by applying an impact force that forces the plate material just before the material is inserted so as to be canceled at the same time as the insertion.2. In addition to installing upper and lower blade shafts that rotate inward, an endless chain that moves toward the tip is installed on the top surface of the base, and its feed claws push the required plate material toward the space between the blade shafts. In such a slitter, the upper end is provided with a rotating rod that swings back and forth along the endless chain (the endless chain) by a cam mechanism in the base, and an auxiliary feed claw is provided on the upper end so as to face the upper surface of the base, This auxiliary feed pawl is used to push the plate through the cam mechanism, rapidly move forward just before the front edge of the plate reaches the blade edge, and then move backward at the same time as the front edge is inserted between the blade edges. A plate cutting device configured to rotate.