JPH08216298A - Apparatus for bending protruding blade for use in rotary paper punch - Google Patents

Abstract

PURPOSE: To reliably bend into a desired shape a protruding blade that has been formed in an arcuate shape. CONSTITUTION: To produce a protruding blade for use in a rotary paper punch that cuts a product shape out of a material sheet inserted between rolls, one of which is provided with the protruding blade fixed to its outer peripheral surface, a blade bending apparatus bends a protruding blade 3 that curves in accordance with the curvature of the roll. The apparatus has a spherical face table 20 having a spherical upper surface corresponding to the curvature of the arcuate protruding blade 3. A stationary die 21 is detachably fixed to a central peak point P of the spherical table. A movable die 22 movable closer to the stationary die by drive means is provided radially apart from the stationary die. The arcuate protruding blade is placed on the spherical upper surface of the spherical table with its roll-planted side contacting the spherical surface. In addition, the blade is positioned so that the bending center of the blade is adjacent to a die face 21d of the stationary die that faces the movable die. The movable die is then moved to the stationary die to bend the arcuate protruding blade into a desired shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding device for a projecting blade used in a rotary paper punching device, and more specifically, it inserts a material sheet between a pair of rolls and projects it onto the outer peripheral surface of one roll. In a rotary paper machine punching device for punching a material sheet into a predetermined product shape by a provided cutting blade, the present invention relates to a bending device that bends an arc-shaped protruding blade curved along the curvature of the roll into a required shape. .

[0002]

2. Description of the Related Art A rotary type paper container punching device of this type is
For example, as shown in FIGS. 7 and 8, the die roll 1 and the anvil roll 2 are rotated in opposite directions to each other, and the protruding blade 3 and the axial direction which are provided so as to project from the outer peripheral surface of the die roll 1 along the product shape in the circumferential direction. The material sheet S consisting of the protruding blade 5 protruding from the outer periphery of the anvil roll 2 and the elastic body 4 attached to the outer peripheral surface of the anvil roll 2 is conveyed, and the material sheet S is punched by the protruding blades 3 and 5 into a predetermined product shape. Then, the punching scraps of the material sheet S are detached by the pins 7 protruding from the pin rolls 6 rotating in the opposite direction to the anvil rolls 2. There may be a case where the elastic body 4 is not provided on the anvil roll 2 side and a case where the punch dust is removed from the outside with another device without providing the pin roll.

Although the protruding blade 5 protruding along the axial direction of the die roll 1 is linear, the protruding blade 3 protruding in the circumferential direction.
Is curved with the same curvature as the outer peripheral surface of the die roll 1, and in many cases the arcuate protruding blades 3 are bent in a U shape and arranged at intervals in the circumferential direction. As shown in FIG. 9, the arcuate protruding blade 3 is provided with a blade portion 3a for cutting the material sheet S along the outer peripheral edge, and is also planted and fixed to the die roll 1 along the inner peripheral edge. The embedded portion 3b is provided so that the curvature of the inner circumference corresponds to the curvature of the outer circumference of the die roll 1.

As shown in FIG. 10, the projecting blades 3 and 5 are
The die rolls 1 are combined and planted in a die roll 1 so as to correspond to a predetermined product shape. For example, FIG.
In FIG. 11B, the arcuate blade 3A is bent into a U shape and is planted in the die roll 1 as shown in FIGS. 11A and 11B. The apparatus shown in FIG. 12 is used.

The folding device is arranged such that an operator holds the projecting blade 3 with one hand on the horizontal work surface 10 of the mounting table 9 and the operating lever 11 is operated with the other hand in the arrow direction. Operate in the direction. Specifically, along the fixed die 16 projecting from the upper surface of the work surface 10, the blade portion 3a of the projecting blade 3 is directed downward and gripped with the lower apex abutting on the work surface 10, and in this state, The movable die 15 provided so as to be opposed to the fixed die 16 so as to be movable is operated by operating the operation lever 11 in the arrow direction.
Move to 6 side. The protruding blade 3 sandwiched between the fixed die 16 and the movable die 15 is bent into a shape along the die surfaces of the fixed die 16 and the movable die 15.

[0006]

However, in the above-described conventional folding device, it is difficult to bend the U-shaped bent blade portions 3a-1 and 3a-2 on both sides so as to have the same curvature. , The blade portions 3 on both sides as shown in FIG.
There was a problem that the edges of a tended to be misaligned. That is, the worker holds the arcuate blade 3 with one hand while holding the lower apex of the blade portion 3a of the arcuate blade 3 in point contact with the upper surface of the horizontal work surface 10, and holds the other. Operation lever 11
Since the arc-shaped protruding blade 3 is bent in an unstable state, the pair of bent blade portions 3a is likely to be in an irregular state.

When the arc-shaped projecting blades 3 having uneven bent portions are attached to the die roll 1, problems such as different protrusion amounts from the surface of the die roll 1 occur, and the punching force against the material sheet S is increased. On the other hand, accurate punching cannot be performed, and partial wear of the blade tends to occur, resulting in a shorter blade life. Further, the work surface 10 has a blade portion 3
Since the above-mentioned bending work is performed by abutting a, there is a problem that the blade portion 3a at the abutting portion is likely to be damaged such as bending or chipping.

The present invention has been made in view of the above problems, and a material sheet is inserted between a pair of rolls such as a die roll and an anvil roll, and the material sheet is formed into a predetermined product shape by a projecting blade protruding from the die roll. It is an object of the present invention to provide a rotary type paper punching device for punching, which is capable of surely bending an arcuate protruding blade curved along the curvature of a die roll into a required shape.

[0009]

In order to achieve the above object, the present invention according to claim 1 is characterized in that a material sheet is inserted between a pair of rolls and a protruding blade is provided on the outer peripheral surface of one roll. A rotary type paper machine punching device for punching a material sheet into a predetermined product shape, which is a bending device that bends an arc-shaped projecting blade curved along the curvature of the roll into a required shape. A spherical mounting table having a spherical upper surface having a curvature corresponding to the curvature of the roll embedding side edge of the roll mounting base, and the fixed mold is detachably fixed to the upper vertex of the center of the spherical mounting base while the fixed mold is fixed. A movable die that moves closer to the fixed die by the drive means is provided at a position further away in the radial direction, and the roll-embedded side of the arcuate blade is brought into line contact along the spherical upper surface of the spherical mounting table. And the arc The folding center of the blade is located along the surface of the fixed die facing the movable die, the movable die is moved to the fixed die side, and the arcuate blade is bent into the required shape. Provided is a bending device for a projecting blade used in a pulling device.

The movable type is moved in the tangential direction of the upper apex of the spherical mounting table by the driving means. (Claim 2) The driving means may be either a manual type that operates the movable die by operating an operation lever or an automatic type that operates the movable die by a computer-controlled motor. (Claim 3)

[0011]

According to the folding device of the first aspect, when the arcuate blade is bent, the arcuate blade is arranged along the spherical upper surface of the spherical mounting table and curved toward the inner peripheral end of the arcuate blade. The lower end surface of the roll embedding side is brought into contact with and arranged. In this state, since the inner circumference of the blade and the curvature of the spherical upper surface are made to coincide with each other, the entire inner peripheral surface of the blade is in line contact with and supported by the spherical mounting table. That is, the protruding blade is supported in a state in which there is no rattling. In this state, the operator positions and holds with one hand, and the other hand operates the movable-type drive means to move the movable die toward the fixed die side, so that the edge of the arcuate blade on the embedded portion side is spherical. While being slid in contact with the upper surface, the arcuate blades are bent between the mold surfaces so that the arcuate blades are bent into a desired shape. Therefore, the bent arcuate blade is surely bent into the required shape in a state in which the edge of the blade portion is aligned with the curvature of the roll. Further, as described above, since the portion of the spherical mounting table that contacts the spherical upper surface is the embedded portion of the arcuate protruding blade, the blade portion is not damaged.

According to the bending device of the second aspect, since the movable die is fitted to the fixed die in a fixed direction in which the movable die is linearly opposed to each other, the projecting blade bent by the fixed die and the movable die. Can be accurately bent around a bending fulcrum facing the fixed mold, and the bent portion can be accurately aligned on the spherical surface. Further, according to the folding device of the third aspect, when the projecting blade to be bent is relatively small and a large force is not required, if the manual type is adopted, the structure of the folding device can be simplified. On the other hand, when the protruding blade is relatively large and has a strong bending force, the automatic type can be preferably used.

[0013]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. 1A and 1B show a folding device of the present invention. The folding device is a rotary paper machine punching device shown in FIGS. 7 and 8, in which the arcuate protruding blade 3 that is planted on the outer peripheral surface of the die roll 1 is bent into a required shape. Since the shape of the arcuate blade 3 itself and the structure of the rotary type paper punching device to which the blade 3 is attached are the same as the conventional ones, the description thereof will be omitted. In addition, even when bending the protruding blade used for a device that does not have an elastic body attached to the anvil roll side, and a device that does not have a pin roll installed,
It goes without saying that the folding device of the present invention can be applied.

The bending device is provided with a spherical mounting table 20 having a shape obtained by cutting a part of a spherical body, and the fixed die 21 is replaceably fixed to the upper apex P at the center of the upper surface of the spherical mounting table 20. At the same time, a movable die 22 is attached by a drive means which moves along the tangent line of the upper apex P of the spherical mounting table 20 and approaches the fixed die 21.

The spherical mounting table 20 has the same curvature as that of the arcuate blade 3, in other words, the curvature of the die roll to which the arcuate blade 3 is attached. A mounting hole 20a for mounting the fixed die 21 is formed at the upper apex P of the spherical mounting table 20.

The fixed mold 21 is provided at its lower end with a mounting portion 21a projecting from the mounting hole 20a.
A screw 23 is inserted through a screw hole 21b formed in the mounting portion 21a, and is screwed to the spherical mounting table 20 so as to be replaceably fixed. As a detachable fixing mode of the fixed die 21 to the spherical mounting table 20, a conventionally known appropriate mode can be adopted.

When the fixed mold 21 is attached to the spherical mounting table 20, the mold surface 21d on the movable mold side of the mold portion 21c of the fixed mold 21.
Is located along the upper apex P of the spherical mounting table 20, and
It is designed to project a required amount from the spherical surface.

A mounting portion 24 for the movable die 22 is provided at a position distant by a required dimension in the radial direction from the fixed die 21 installed at the upper apex P of the center of the spherical mounting table 20. The movable mounting portion 24 has a horizontal upper surface 2 having substantially the same height as the upper apex P.
4a, and the driving means 25 and the movable die 22 moved by the driving means 25 are arranged on the upper surface 24a. The drive means 25 includes an operating lever 28 rotatably supported by a casing 26 via a shaft 27, a pinion (not shown) attached to the shaft 27 that rotates integrally with the operating lever 28, and engages with the pinion. And a guide part 30 for guiding the moving shaft 29 to the fixed mold side, and the moving mold 22 is provided at the tip of the moving shaft 29.
The replacement is attached freely. That is, an engaging groove 29a is provided at the tip of the moving shaft 29, and a fitting portion 22b protruding from the end surface of the moving die 22 opposite to the mold surface 22a is fitted and locked in the engaging groove 29a. Further, the guide portion 30 is
Both sides of the moving shaft 29 are slidably supported by a pair of support walls 31, and are closed by a lid member 32 in this state. Note that the driving means of the movable die 22 is not limited to the above-mentioned configuration, and any conventionally known appropriate means can be adopted.

When the arcuate blade 3 is bent by the bending device having the above-described structure, first, as shown by the alternate long and short dash line in FIGS. 1 (A) and 1 (B), and as shown in FIG. Arc-shaped projecting blade 3 curved in a mountain shape along the upper surface 20b
The lower end edge of the inner peripheral end side of the die roll embedding portion 3b side is brought into contact with and arranged. In this state, since the curvature of the inner circumference of the blade 3 is made to match the curvature of the spherical upper surface 20b, the entire inner surface of the blade 3 is in line contact with and supported by the spherical mounting table 20. It That is, the protruding blade 3 is supported in a state in which there is no backlash.

Then, the position where the arcuate blade 3 is bent and the mold surface 21d of the fixed mold 21 are made to correspond to each other, and in this state, the operator positions and holds them with one hand, and the other hand holds the operation lever. 28 is operated in the direction of the arrow.

As a result, the moving shaft 29 is guided by the guide portion 3
Guided by 0, it moves forward toward the fixed mold 21, and the moving shaft 29
The movable die 22 attached to the tip of the abuts on the side surface of the arcuate blade 3. By continuing the forward movement of the movable die 22, as shown in FIGS.
Mold surface 2 with arcuate blade 3 sandwiched between 1d and 22a
1d and 22a are fitted, and the arcuate protruding blade 3 is bent into a U shape, as shown in FIG. 4, corresponding to the shapes of the mold surfaces 21d and 22a. At this time, the arcuate protruding blade 3 is bent while the end edge of the embedded portion 3b in the die roll 1 is in sliding contact with the spherical upper surface 20b, and as shown in FIG. 11, the blade portions located on both sides of the bending fulcrum. 3a-1 and 3a-2 are bent into a required shape in a state where the edges are uniformly aligned.

As described above, in the folding apparatus of the present invention, the operator holds the arcuate protruding blade 3 with one hand and operates the operating lever 28 with the other hand in the same manner as in the prior art. Although the blade is bent, the arcuate protruding blade 3 can correspond to the bending position with the molds 21 and 22 in a state in which there is no rattling on the spherical upper surface 20b as described above. Therefore, the arcuate protruding blades 3 are provided on both sides of the bent portion.
The curvature of a can be formed so as to correspond to the curvature of the die roll 1, and the blades 3a on both sides can be surely bent so that the edges thereof are aligned.

Further, since the spherical upper surface 20b of the spherical mounting table 20 is mounted in a state in which the embedding portion 3b to be planted in the die roll 1 is in contact with the spherical upper surface 20b, the blade portion 3a is not damaged by bending or chipping. There is no fear of occurrence. Therefore, a die blade with a blade edge with a non-uniform blade edge or a blade edge with damage to the blade portion 3a
It is possible to surely prevent the conventional problems caused by mounting on.

In the folding device, the fixed die 21 and the movable die 22 are replaced with those having a die surface of an arbitrary shape, and as shown in FIG.
It can also be bent into a substantially L shape.

Further, the drive means of the above embodiment is a manual type having an operating lever, but as shown in FIG. 6, a motor 40 is automatically controlled by a computer 40 to rotate and a pinion connected to an output shaft of the motor 41. An automatic configuration may be used in which the rack 29b of the moving shaft 29 is moved back and forth by rotating 42. It should be noted that the computer may move the cylinder to move the moving shaft attached to the cylinder rod back and forth, or the switch may operate the motor or the cylinder without using the computer.

In the case of the above-mentioned automatic type, the pressing force applied to the moving shaft can be easily adjusted, and the pressing force can be accurately adjusted by pressing with an appropriate force according to the thickness and size of the bending blade to be bent. I can.

[0027]

As is apparent from the above description, in the bending device of the projecting blade used in the rotary type paper punching device according to claim 1 of the present invention, a circle attached to the outer peripheral surface of the roll along the circumferential direction. When the arcuate blade is bent into a U-shape or L-shape, it is mounted on a spherical mounting table that has the same curvature as the curvature of the inner edge of the blade, so The entire end face abuts the spherical mounting table and is stably supported by line contact. Therefore, when the protruding blade is bent by sandwiching it between the fixed die and the movable die, the spherical upper surface of the spherical mounting table can be bent while making sliding contact with the protruding blade without causing rattling. As a result, all the bent portions of the blade are bent along the curvature of the spherical upper surface, that is, the curvature of the roll. Therefore, when bent in a U-shape, a pair of bent portions facing each other with a gap can be aligned with the same curvature. In this way, since the curvature of the bent portion can be kept the same as the curvature of the roll, the protrusion amount of the blade can be held evenly when the roller is projected, and the blade may be partially worn. In addition to being able to prevent it, it is possible to perform accurate punching of the material sheet by the projecting blade.

In addition, when the projecting blade is bent, the part that comes into contact with the spherical upper surface of the spherical mounting table becomes the roll-embedded part of the projecting blade, and since the blade part faces upward, damage to the blade part during bending is not possible. There is no.

Further, in the bending device of the second aspect, since the movable die is moved forward from the tangential direction with respect to the fixed die to be fitted, the blades bent by the fixed die and the movable die can be bent accurately. Therefore, it is possible to bend the curved portion in conformity with the curvature of the spherical upper surface of the spherical mounting table without causing an inclination in the bent portion.

Further, according to the folding device of the third aspect, when the projecting blade for folding is relatively small and a large force is not required, the manual type is adopted to simplify the construction of the folding device. Therefore, the device can be manufactured at low cost. On the other hand, the blade is relatively large and thick,
When there is a strong bending force, the automatic type using a motor or the like can be used for easy and reliable bending.

[Brief description of drawings]

FIG. 1 shows an arcuate blade folding device according to the present invention,
(A) is a side view and (B) is a plan view.

2A and 2B show a state in which an arcuate blade is placed on a folding device, FIG. 2A is a front view, and FIG. 2B is a side view.

3A and 3B show a state in which a projecting blade is bent by a bending device, FIG. 3A is a plan view, and FIG. 3B is a side view.

FIG. 4 is a perspective view showing an arcuate protruding blade bent into a U shape by a bending device.

FIG. 5 is a perspective view showing an arcuate protruding blade bent into an L shape by a bending device.

FIG. 6 is a side view of a folding device provided with the automatic drive means of the present invention.

FIG. 7 is a schematic view showing a rotary type paper machine punching device.

8 is a sectional view showing a punching state of a material sheet by the apparatus of FIG.

9 is a front view showing an arcuate blade that is planted in the device of FIG. 7. FIG.

10A and 10B show a cylindrical die roll to which a blade is attached, FIG. 10A is a side view, and FIG.

FIG. 11 shows a U-shaped bent arcuate blade,
(A) is a perspective view and (B) is a plan view.

FIG. 12 shows a conventional folding device, (A) is a perspective view,
(B) is a schematic sectional view.

FIG. 13 is a front view showing an arcuate projecting blade in which an edge of a blade portion is unevenly bent by a conventional bending device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Die roll 2 Anvil roll 3 Arc-shaped projecting blade 3a Blade part 3b Embedded part 20 Spherical stage 21 Fixed type 22 Movable type 25 Driving means 28 Operation lever 40 Computer 41 Motor S Material sheet

Claims (3)

[Claims] 1. A rotary paper machine punching device in which a material sheet is inserted between a pair of rolls, and the material sheet is punched into a predetermined product shape by a projecting blade protruding from the outer peripheral surface of one roll. A bending device for bending the arc-shaped protruding blade curved along a desired shape into a required shape, wherein a spherical mounting table having a spherical upper surface having a curvature corresponding to the curvature of the arc-shaped protruding blade is provided, The fixed die is removably fixed to the position of the upper apex of the center of the mounting table, while the movable die which moves closer to the fixed die by the driving means is provided at a position radially separated from the fixed die. Along the spherical upper surface of the mounting table, the roll embedding side end surface of the arcuate blade is placed in contact with it, and the bending center of the arcuate blade is placed along the mold surface of the fixed die facing the movable die. Position, move the movable mold to the fixed mold side, Folding device 突刃 used in rotary folding cartons punching device which is configured to bend the arcuate 突刃 the required shape. 2. The blade bending device according to claim 1, wherein the movable die is moved in a tangential direction of an upper apex of the spherical mounting table by a driving means. 3. The driving means is a manual type that operates the movable die by operating an operating lever, or an automatic type that operates the movable die by a motor controlled by a computer. Bending device for the described blade.