JPH0329711B2 - - Google Patents

Description

Detailed Description of the Invention The present invention involves folding and discharging base paper that is continuously supplied from a roll or the like using a pair of folding rollers, and cutting and separating the folded and discharged base paper from the center. This article relates to a roller for a zigzag folding machine that creates origami products.

Conventionally, both sides of the base paper fed out from the base paper roll are folded continuously in the width direction, and then the base paper 1 is folded over the rollers 2 as shown in FIG.
The base paper 1 is folded in a zigzag manner by a pair of folding rollers 3, 3' and discharged to the discharge section 4 side, and the base paper 1 is folded in this zigzag manner. By cutting and separating the base paper 1 from the center with a cutter 5, origami products 6..., 6... were created.

As shown in FIG. 2, the folding rollers 3, 3' used at this time are comprised of pushing members 7, 8 with bent tip portions 7a, 7a' that protrude and retract from the circumferential surfaces 3a, 3a' of both rollers; Holding members 11, 12 for holding the paper by pressing against one side 9a, 10a of the slits 9, 10 formed with openings in 3a, 3a'
It is mainly composed of. The method of folding paper into a zigzag pattern using the folding rollers 3 and 3' was carried out as follows. That is, by rotating the rollers 3, 3' in opposite directions with the tip portions 7a, 8a of the pushing members 7, 8 protruding from the circumferential surfaces 3a, 3a' of the rollers 3, 3', the rollers 3, 3' are rotated in opposite directions. The tips 7a, 8a protruding from the circumferential surfaces 3a, 3a' of the slits 9, 10 enter the space between the one side 9a, 10a of the slits 9, 10 and the clamping members 11, 12, just as the gears are engaged, and the continuous Push the paper supplied into the space above. The state shown in FIG. 2 shows that the tip portion 7a has entered the above-mentioned gap. As the rollers 3 and 3' continue to rotate from this state, the holding member 1
2 rotates toward one side 10a and pinches the paper being pushed in between it and one side 10a, and in the process of this pinching operation, the tip 7a of the pushing member 7 that has been protruding until now moves to the roller 3. The paper moves in the direction of sinking from the circumferential surface 3a, and the paper is held between the holding member 12 and one side 10a. After the rollers 3 and 3' rotate to a predetermined rotation angle while maintaining this nip and pull out the paper to a predetermined length, the nip member 12 is rotated in a direction in which the nip is released by a cam mechanism (not shown). The zigzag fold is moved to release the grip, and one side of the zigzag fold is folded.

When a thin plate material is used in the pushing member of such a zigzag folding machine, the following problems arise.
In other words, because the tip of this pushing member is bent and because it is inside a wide slit, there is nothing to guide it, so the pushing member buckles due to the force when pushing the paper into the gap. There is a problem that the paper is bent and cannot be pushed into the gap. If the pushing member is made of a thick plate material in order to prevent this deflection, the following problems arise. In other words, in the process where the holding member rotates toward one side of the slit to hold the paper, when the pushing member moves in the direction of sinking into the circumferential surface of the roller, the movement is not linear but oscillating. As it moves, the gap between the holding member and one side of the slit
Since the gap is in the direction of narrowing and the roller is continuously rotating, the tip of the pushing member is squeezed between the holding member and one side of the slit and sinks into the circumferential surface of the roller. Due to this prying of the pushing member, the paper pushed into the gap is pulled out from the gap as the pushing member is pulled in, and there is insufficient pinching allowance between the clamping member and one side of the slit to prevent the paper from being clamped. The problem is that it becomes uncertain. In particular, this tendency becomes more pronounced when the efficiency of zigzag folding is increased by rotating the rollers at high speeds, which limits the number of rotations of the rollers and reduces productivity.

The present invention has been made in view of the above-mentioned problems, and the pushing member is attached to a folding roller so as to be linearly retractable in the radial direction from the first slit, so that the pushing member does not protrude from the circumferential surface of the roller. By reducing the number of parts so that even a thin member can withstand the pressing force of the pressing member, the pressing member is made thinner, the pressing member reliably pushes the base paper into the slit, and the pressed base paper 1 is pressed. To provide a roller for a zigzag folding machine whose members can be folded to increase the number of folds of base paper.

Hereinafter, one embodiment of the roller of the present invention will be described based on the drawings. Note that the same reference numerals are used for the same parts as shown in FIGS. 1 and 2.

In FIG. 3, 13, 13' are a pair of rollers for a zigzag folding machine, and these rollers 13, 13' are connected to a shaft 14, which rotates in opposite directions.
It is integrally attached to the middle part of 14'. Fourth
As shown in the figure, one roller 13 has roller 1
The first slit portion 1 is formed on the circumferential surface 13a of 3 so as to open parallel to the axis of the roller 13.
A pushing part 15a that comes out and comes out from 3b and presses the base paper 1
A pushing member 15 is provided. The base side of this pushing member 15 is located at one side peripheral portion 13 of the roller 13.
d is integrally attached to a shaft 16 rotatably built in.

As shown in FIGS. 4 and 5, the first slit portion 13b is a passage for the pushing member 15 to emerge and retract from the circumferential surface 13a of the roller 13.
The slit portion 13b is formed so as to face a second slit 17 that opens parallel to the axis of the other roller 13' when the shaft 14 rotates. While one side surface of the pushing member 15 is in contact with the one side straight portion 13c of the first slit portion 13b, the pushing portion 1 of the pushing member 15 is rotated toward the second slit 17 as the shaft 14 rotates.
5a is formed to protrude and retract linearly from the circumferential surface 13a of the roller 13.

As shown in FIG. 6A, the push-in portion 15a of the push-in member 15 whose left end base is integrally attached to the shaft 16 is provided with comb-like protrusions 15b at predetermined intervals in the vertical direction. It is being

As shown in FIG. 4, a rotatable shaft 19 is built in the slit portion 18 that forms the second slit 17, and the shaft 19 has a rotatable shaft 19 that is inserted into the second slit by the pushing member 15. 17
When the base paper 1 is pushed inside, the shaft 19
The right end of the holding member 20, which can be approached and separated, approaches the lower inner surface 18a of the slit portion 18 forming the second slit 17 as the paper rotates, and presses and holds the base paper 1 against the lower inner surface 18a. The parts are attached as one piece.

The clamping member 20 includes a base paper retaining member 21 made of an elastic member having a plurality of base paper retaining claws 21 a slightly curved toward the lower side at its tip, as shown in FIG. The pressing member 22 has a parallel groove 22a on the pressing surface side into which the locking claw 21a is fitted. As shown in FIG. 4, the right end portions of both members 21 and 22 are integrally attached to the shaft 19 with screws, etc., and when the clamping member 20 does not press or clamp the base paper 1, the base paper locking claw 21a is slightly separated from the pressing surface of the pressing member 22.

The second slit 17 is connected to the base paper locking member 2.
1 and the lower inner surface 18a of the slit portion 18.

As shown in FIGS. 7A and 7B, a rotatable driven roller 23 is attached to the upper end of the shaft 16, and rotates while constantly in contact with a cam 24 provided at the upper end of the shaft 14. Like, roller 1
3 in the axial direction by a spring 25.

When both rollers 13, 13' rotate until the pushing member 15 of the roller 13 faces the second slit 17 of the roller 13', the cam 24 causes the pushing member 15 to protrude toward the slit 17, thereby causing the original paper A two-stage uneven portion 24a is formed on the circumferential surface of the roller 13 so that when the locking claw 21a rotates to press and lock the base paper 1, the pressing member 15 is submerged from the circumferential surface 13a of the roller 13.

On the other hand, the shaft 19 to which the clamping member 20 is attached is equipped with a driven roller 26 rotatably provided at the lower end of the shaft 19, as shown in FIG. ,
A spring 28 biases the roller 13' in the axial direction so that the roller 13' rotates in constant contact with a cam 27 provided at the lower end of the shaft 14' of the roller 13'.

When the base paper 1 is pushed by the pushing member 15 into the second slit 17 of the roller 13', the cam 27 initially locks the base paper 1 with the base paper locking claw 21a, and then the roller 13' rotates. Then, the pressing member 22
A three-stage uneven portion 27a is formed on the circumferential surface so that the base paper 1 can be pressed and held.

Although omitted in the drawing, the pushing member 1
5, the roller 1 is attached to the peripheral portion 13'a of the roller 13'.
The clamping member 20 is also provided on the peripheral portion 13a of the roller 13 so as to face the pressing member 15 with the axis of the roller 13 as the center. , is formed to operate in the same manner as the pressing member 15 and the clamping member 20 described above.

The operation of this embodiment configured as described above will be explained next. The cam 24 also rotates due to the continuous rotation of the rollers 13, 13'. Therefore, first of all, the relationship between the cam 24 and the driven roller 23 in FIG. The pushing member 15 protrudes from the outer circumferential surface of the roller 13, and the pushing member 15 maintains the protruding state while the driven roller 23 is guided by the small diameter portion of the cam 24. On the other hand, the relationship between the cam 27 and the driven roller 26 in FIG. The open state is maintained while being guided. As described above, the pushing member 15 and the slit 17 protrude as the rollers 13 and 13' rotate with the space between the base paper locking claw 21a and the lower inner surface 18a open. Push the member 1 into the slit 17 so that the gears are just engaged.
5 enters and pushes the base paper into the slit 17. When pushing the base paper into the slit 17 in this way, since the pushing member 15 is made of a thin steel plate, its elastic force causes the straight portion 13 on one side to
Since the push member 15 is guided and linearly projected while being pressed against the push member 15, the force at the time of pushing acts in the axial direction of the push member 15, and the push member 15 does not buckle. Next, when the driven roller 23 is guided from the uneven portion 24a of the cam 24 to the large diameter portion of the cam 24, the shaft 14 is rotated and the pushing member 15 is instantaneously retracted. This instantaneous operation of the pushing member 15 is achieved by forming the pushing member 15 from a thin steel plate, and
Since its base end is integrally fixed to the shaft 16, there is no play between the shaft 16 and the pushing member 15, and this is achieved by directly transmitting the rotational movement of the shaft 16 to the pushing member 15. Ru. On the other hand, when the driven roller 26 is guided from the uneven portion 27a of the cam 27 to the large diameter portion of the cam 27, the shaft 1
9 is rotated, the pressing member 22 swings toward the lower inner surface 18a, and the base paper locking claw 21a is first pressed against the lower inner surface 18a, and the pressed base paper 1 is held by the elastic force of the base paper retaining claw 21a. Hold the base paper with the paper retaining claw 2.
1a is forcibly pressed against the lower inner surface 18 by the pressing member 22.
Firmly grip the base paper 1 that has been strongly pressed and pushed in by a. The timing at which the pushing member 15 is pulled in is determined by the elastic force of the base paper locking claw 21a.
This is when they are being held. In this embodiment, the base paper locking pawl 21a has a comb-like shape, so its elastic force is optimal for holding the base paper 1. Only the pushing member 15 is pulled in while maintaining the clamped state with force. The reason why only the pushing member 15 is drawn in in this way is because the pushing member 15 is made of a thin steel plate and is guided by the linear portion 13c on one side so that it is drawn in linearly. The base paper 1 firmly gripped in this manner is wound around the outer circumference by the rotation of the roller 13', and when the roller 13' rotates approximately half a rotation, the driven roller 26 moves onto the uneven portion 2 of the cam 27.
7a to the small diameter portion of the cam 27, the pressing member 22 is separated from the lower inner surface 18a, and the holding of the base paper 1 is released. In this way, one side of the zigzag fold is folded.

Furthermore, when the pair of rollers 13, 13' rotate 180 degrees, the base paper 1 is folded in the opposite direction by another pair of pushing members 15 and clamping members 20.

In this way, the base papers 1 are folded one after another in a zigzag pattern and are discharged to the discharge section 4. As a result, the rotation of conventional rollers is 150 to 200 [R.
PM] could only fold the base paper 1, whereas the roller for the zigzag folding machine of the present invention could fold the base paper 1
Now it can be folded even at [RPM].

As detailed above, according to the present invention, the proximal end of the pushing member formed of a thin steel plate is integrally fixed to the shaft provided on one side circumference of the roller, and the pushing member is rotated by rotation of the shaft. Since the pushing member is made to appear and disappear, the pushing member can be moved linearly and the paper can be reliably pushed out without bending of the pushing member, and the rotational movement of the shaft is directly transmitted to the pushing member. , the pushing member can be quickly moved in and out, the number of unit folds of base paper can be increased, and productivity can be improved.

[Brief explanation of drawings]

Fig. 1 is a schematic perspective view of a folding roller of a conventional zigzag folding machine, Fig. 2 is a cross-sectional view showing the operating state of the conventional folding roller, and Fig. 3 is a roller for a zigzag folding machine of the present invention. FIGS. 4 and 5 are partially enlarged cross-sectional views showing the operating state of the roller of the present invention, and FIGS. , bottom view, and Fig. 7 A, B, and C are the pushing members shown in Fig. 3, respectively;
FIG. 3 is an enlarged front view of a base paper locking member and a pressing member. 13, 13'...Folding roller, 13a,
13'a... Roller peripheral surface, 13b... First slit, 15... Pushing member, 17... Second slit, 18a... Lower inner surface, 22... Pressing member.

Claims (1)

[Claims] 1 A pair of paper folding rollers arranged adjacent to and parallel to each other, a pushing member that comes out and retracts from a first slit opened in the peripheral surface of the roller parallel to the axis, and a pressing member provided in a second slit opening in parallel to the circumferential surface of the roller and capable of approaching and separating toward one side of the inner surface of the second slit; When the pressing member of the other roller faces the slit, the pressing member of the other roller pushes the continuously supplied base paper between the inner surface of the second slit of the one roller and the pressing member. In the zigzag folding machine, the pushing member is formed of a thin steel plate, and the proximal end side of the pushing member is integrally fixed to a shaft rotatably built into one side circumference of the roller. Roller for zigzag folding machine.