JPH07214500A - Punching device - Google Patents

Abstract

PURPOSE:To precisely punch even an article with a folded part as well as to separate the article and scrap at the point of time when punching of the article is completed under a punching method and in a punching device to punch the article from a material sheet by using a flat mold. CONSTITUTION:Articles 71, 71 are punched by making the lower surface of a flat die 131 held free to horizontally move as a blade shape forming surface, sandwiching and pressurizing a material sheet 7 by way of pressurizing a lower roll 202 with a blade edge bite-in sheet 8 wound around it from below against this blade shape forming surface and making the lower roll 202 contact with the blade shape forming surface 132 of the flat die 131 rolling by synchronously driving the flat die 131 and the lower roll 202. The article 71 is punched as the blade edge bite-in sheet 8 and the blade shape forming surface 132 precisely match with each other, it is taken out from a punching treatment part downward, and scrap is taken out to the side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a punching device, and in particular, a flat plate having a blade formed on one surface of a flat substrate to produce a product of a predetermined shape from a raw material paper, and in particular, a blank in the shape of a developed packaging box. The present invention relates to a device for punching blanks and cards with folds.

[0002]

2. Description of the Related Art Conventionally, when blanking products such as blanks and cards from blank paper, a blanking machine of a press type is used. In this case, since a simple flat mold in which a strip-shaped blade is planted in a rectangular ring shape can be used, the mold cost is low. Therefore, it is particularly effective for punching a wide variety of products.

However, in this press type punching machine, the entire area of the blade die forming surface is simultaneously pressed against the material sheet, and therefore the pressing force required for punching is large. Further, in order to allow the product and scrap to be taken out from the punching section after the punching is completed, as shown in FIG.
A connection (73) (73) is required between the product (71) and the scrap (72). Further, after the punching is completed, it is necessary to cut the joint (73) to separate the product (71) and the scrap (72).

To reduce the punching pressure force out of these problems, the type shown in FIG. 2 can be adopted.
This is composed of a flat die (131) which is driven in the horizontal direction and a half cylinder press (74) having a semi-circular cross section which is in contact with the upper surface of the blade die forming surface (132). ) The material paper (7) is clamped at the end and the half cylinder press (74) and flat mold (131) are driven in synchronization,
In the mode in which the material paper (7) is pinched between the half cylinder press (74) and the flat mold (131), the half cylinder press (74) is pressed against the material paper (7) in a rolling contact state. Since the products (71) (71) are punched, the pressing force required for punching is greatly reduced.

However, even in the case of this type, the products (71) (7
The product (71) (71) cannot be taken out from the upper surface of the flat mold (131) unless the connection (73) (73) is provided between the 1) and the scrap (72). (71) (71)
The work to separate it into scrap (72) is required. The present invention has been made in view of such a point, and "the flat sheet (131) of the flat plate (131) is pressed by the material sheet (7) to form the material sheet (7), Products in the prescribed shape from (7) (71)
Equipment for punching (71) '', the product (71) and the scrap (7
The task is to punch through without providing the joints (73) and (73) with 2), and additionally to be able to handle products (71) that require creasing.

[Invention of Claim 1]

[0007]

[Technical Means] The technical means of the method of the present invention taken in order to solve the above-mentioned problem is that "a flat mold (131) whose lower surface is a blade mold forming surface (132) is reciprocally horizontally movable. Retaining plate (13)
The upper roll (201), which is attached to the lower surface of the mold and comes into contact with the mold holding plate (13) from above, and the rectangular cutting edge biting sheet (8) on the outer peripheral surface, are removably wound and flat. (13
A lower roll (202) is provided so as to face the blade mold forming surface (132) of 1) from below, and the mold holding plate (13) and the lower roll (2) are provided.
02) and synchronously reciprocating, and the linear movement speed of the mold holding plate (13) and the peripheral speed of the surface of the cutting edge biting sheet (8) attached to the outer peripheral surface of the lower roll (202). It was said that it was matched. Here, the material paper (7) may be a rectangular paper of a certain size or a long strip paper.

[0008]

The above technical means operates as follows. When punching, lower the roll against the blade forming surface (132) of the flat die (131).
Cutting edge biting sheet fixed to the outer peripheral surface of (202) (8)
Contact each other from below, and make rolling contact with the blade biting sheet (8) and the blade forming surface (132). And flat type (131)
The material paper (7) attached to the blade mold forming surface (132) of the flat roll (131) is pressed by the pressure between the upper roll (201) and the lower roll (202).
When the material paper (7) is clamped, the position of the material paper (7) moves sequentially, the blade of the blade forming surface (132) bites into the blade tip biting sheet (8), and the product (71) (71) is punched. .

At the time of punching, the die holding plate (13) and the flat die (131) attached to the lower surface of the die holding plate (13) are opposed to each other in the upper and lower rolls.
Since the pressure is sandwiched between the (201) and the lower roll (202), the pressing force for punching can be increased even if the die holding plate (13) and the flat die (131) have insufficient rigidity. That is, the punching device as a whole can be reduced in weight. Further, the blade mold forming surface (13
Even when each punching blade die (11) in 2) is composed of continuous blades in an endless loop, the lower roll (202) and flat die (13
The position where the material paper (7) is clamped by (1) is sequentially moved to punch the product (71) (71), and the product (71) is dropped downward at a position beyond the lower roll (202). On the other hand, scrap (72) is the lower roll
It is sandwiched between the (202) and the flat mold (131), and the punching operation proceeds in this state.

The rear end of the flat type (131) is the lower roll.
If you move forward from (202), punching is completed. After that, when the scrap (72) is removed and the flat mold (131) is returned to the initial position, each part returns to the initial state. Flat type (131)
When the lower roll (202) is moved away from the blade forming surface (132) when returning to the initial position, the returning operation of the flat die (131) is smooth.

After that, when the series of operations described above is executed,
Products (71) (71) are punched out from new material paper (7). When a crease is required for a part of the product (71), a crease blade for making a crease is provided on the blade mold forming surface (132) of the flat mold (131) so as to correspond to the position of the crease. Bite sheet
A recess is formed at a location corresponding to the crease blade in (8). This concave portion is formed by a method such as partially cutting the cutting edge biting sheet (8) or forming a concave groove on the surface of the cutting edge biting sheet (8).

When the combination of the cutting edge biting sheet (8) and the flat die (131) is used, at the time of completion of the punching work, a bent portion for folding (a so-called folding fold Part) is formed. The mold holding plate (13) and the lower roll (202) are synchronously reciprocally driven, and the linear movement speed of the mold holding plate (13) and the outer peripheral surface of the lower roll (202) are attached. Sheet with bite
Since the peripheral speed of the surface of (8) was matched, when punching a product with a crease, the cutting edge biting sheet (8) on the surface of the lower roll (202) and the blade forming surface (132) were No deviation occurs.

In this way, the cutting edge biting sheet (8) and the flat type
By exchanging the combination of (131), it is possible to support both simple punching and punching of products with folds.

[0014]

[Effect] Even if each punching blade die (11) of the blade die forming surface (132) has a structure in which band-shaped blades are continuous in an endless loop, punched products (71) (71) are scrapped. Since it is separated from the (72) and dropped below the flat type (131), the product (71) (7
1) and scrap (72) can be taken out separately. Therefore, the work of separating the product (71) (71) and the scrap (72) after punching is unnecessary.

Even if the rigidity of the die holding plate (13) or the flat die (131) is insufficient, the pressing force for punching can be increased, so that the punching device as a whole can be reduced in weight. Further, by changing the combination of the blade tip biting sheet (8) and the flat die (131) die forming surface (132), it is possible to cope with punching of products having folds. When punching the product with this crease, the lower roll (202) and the mold holding plate (13) are driven synchronously, and the linear movement speed of the mold holding plate (13) and the outer peripheral surface of the lower roll (202) are attached. Since the peripheral speed of the surface of the cut edge-cutting sheet (8) is made to coincide with each other, there is no deviation between the punching position and the fold position.

[Other Inventions] The following improvements and the like can be adopted in the above invention. “The upper roll (201) shall be driven synchronously with the mold holding plate (13).
(1) the peripheral speed of (1) and the linear movement speed of the die holding plate (13) are matched '', the die holding plate (1
No external force is applied to the mold holding plate (13) after the point when the lower roll (202) and the lower roll (202) stop. Upper roll
When the (201) is free, when the lower roll (202) and the mold holding plate (13) are stopped, the inertia force of the upper roll (201) causes a moving force to act on the mold holding plate (13). As a result, an unreasonable external force acts on the mold holding plate (13), but such an inconvenience does not occur in the case of adopting the above configuration.

In the one in which the lower roll (202) can be moved up and down and the lower roll (202) is moved away from the flat mold (131) when the mold holding plate (13) is driven to return, the mold holding plate ( 13)
When the blade is driven to return, the blade forming surface (132) of the flat type (131) attached to this does not come into contact with the blade biting sheet (8), so that the return drive operation can be speeded up and the blade biting sheet (8) It is possible to prevent unnecessary damage.

"A plate-shaped scraper (8) is provided in the vicinity of the outer periphery of the lower roll (202) along the generatrix of the lower roll (202) and obliquely to the arc of the cross section.
1) is provided, and the free end side edge of this scraper (81) can be brought into and out of contact with the surface of the lower roll (202) '', the blade bite sheet (8) is the surface of the lower roll (202). In the case of the type that is adhered to the lower roll (202), the scraper (81) is contacted with the free end side edge to the surface of the lower roll (202).
By rotating the blade, the cutting edge biting sheet bonded
Since the (8) is scraped off by the free end side edge of the scraper (81), the cutting edge biting sheet (8) can be easily and surely peeled off.

[0019]

EXAMPLE A punching device of this example has a structure as shown in FIG. 3 and has a reciprocating drive device (102) for reciprocally driving a die holding plate (13) and the die holding plate (13). The upper roll (201) made of metal, which contacts the upper surface of the mold, and the flat mold (131), which is attached and fixed to the lower surface of the mold holding plate (13), come into contact with the upper and lower surfaces of the flat mold (131) so that it can separate and descend from the lower surface of the mold and the outer surface. A metal lower roll (202) to which the cutting edge bite sheet (8) is adhered, a lifting device (101) that drives the lower roll up and down, and a reciprocating rotation drive device (103) that reciprocally rotates the lower roll (202). It is a punching device configured to punch each product (71) from a single sheet of material paper (7) on which a large number of foldd products (71) (71) are printed.
Also, the blade forming surface (132) of the flat mold (131) is as shown in FIG.
A rectangular annular punching blade die (11) with a number corresponding to the number of products
(11) is planted. Also, this punching blade type
The cutting edge of (11) is continuous in a loop shape and does not have a discontinuous portion (or cutout portion) as in the past.

Hereinafter, each part of this apparatus will be described in detail. [Punching main part] * About flat type (131) The flat type (131) has a rectangular annular punching die type (11) (11) arranged in a matrix on a wooden board (10) as shown in FIG. Planted in
Bend a strip-shaped tool into a rectangular ring shape and abut both ends to make each punching blade die (11), and each punching blade die (11)
A sponge layer (12) as an elastic cushion layer is formed in the whole area, and the surface height thereof is slightly higher than the height of the punching blade molds (11) (11). In this embodiment, no sponge layer is provided between the punching blade dies (11) and (11), and the punching blade dies (11) and (11) are provided with a left and right punching blades in the outer peripheral area. The sponge blocks (121) (121) are arranged at a predetermined interval in a manner that they are not located between the molds (11) (11). The height of the sponge blocks (121) (121) is the same as the sponge layer.
It is set lower than the height of (12) and higher than the height of the punching die (11).

Further, the sponge layer (1
2) is provided with a plurality of elastic shafts (122) (122) which slightly project from the surface of the same and elastically expand and contract independently with respect to the sponge layer, as shown in FIG. In this embodiment, the elastic shaft (122) is composed of a sponge member similar to the sponge layer, and has a hole (1) formed in the sponge layer (12).
23) It is embedded and fixed in a loose fit. The elastic shafts (122) (122) are located in the punching blade die (11) near the front end in the moving direction of the punching operation.

* Overall Structure The punching device of this embodiment is specifically constructed as a whole as shown in FIGS. 6 to 8. And since the flat type (131) is used, as shown in FIG.
Upper rolls (201) placed above and below each other (100)
A mold holding plate (13) for holding the flat mold (131) is supported horizontally between the lower roll (202) and the lower roll (202).
The right and left sides of the mold holding plate (13) are movable bodies mounted on rails (141) (141) provided on opposite side walls of the frame (100).
(14) It is fixed to (14). (This structure is not shown in FIG. 6) The upper roll (201) is the mold holding plate (13).
Rolling contact with the upper surface of.

Further, since the mold holding plate (13) is reciprocally driven between the initial position and the final position, the upper roll (201)
To rotate the mold holding plate (13) in synchronism with the upper roll (2
The gear (20) provided on the rotating shaft of (01) and the rack (21) provided on the mold holding plate (13) are engaged with each other. And this gear (2
The diameter of the pitch circle of (0) matches the diameter of the upper roll (201), and the contact point between the pitch circle and the pitch line of the rack (21) matches the upper surface of the mold holding plate (13). As a result, the linear movement speed of the die holding plate (13) and the peripheral speed of the outer peripheral surface of the upper roll coincide with each other.

The transmission mechanism consisting of the gear (20) and the rack (21) is arranged on both sides of the mold holding plate (13) and is transmitted to the rotary shaft of the lower roll (202) as shown in FIGS. It is driven by the servo motor (28). This servo motor (28) is connected to the lower surface of the reducer (282) to which the rotating shaft of the lower roll (202) is connected, and is connected to the input shaft (285) of this reducer.
And the output shaft of the servo motor (28) are connected, and the input shaft (2
85) is extended and projected upward from the speed reducer (282). The rotating shaft of the upper roll (201) is driven through the speed reducer (281), and the input shaft (285) of this speed reducer (281) and the upward extension of the input shaft (L ₂ ) are coaxial with each other. In position, these input shafts mate with the shaft coupling (283) by, for example, spline fitting.

The speed reduction ratio of the speed reducers (281) (282) is determined by the diameter of the upper roll (201) and the diameter of the lower roll (202) (more precisely, the surface of the cutting edge biting sheet (8) attached thereto). It is set to a predetermined ratio according to the ratio of (outer diameter of), and in addition, the rotation directions of the output shafts of the speed reducers (281) and (282) are set in opposite directions to each other. The peripheral speed of the outer circumference of the upper roll (201) and the lower roll (202) is the same as the peripheral speed of the outer peripheral surface of the cutting edge biting sheet (8), which will be described later, mounted on the lower roll (202). The moving directions on the mold holding plate (13) side are the same.

The servomotor (28) is controlled in relation to the feeding operation and the punching operation of the material paper (7). Then, when reciprocatingly rotated at a predetermined amount and at a predetermined timing, the upper roll (201), the lower roll (202), and further the mold holding plate (13) are synchronously reciprocally driven so as to satisfy the operating conditions described later. The reciprocating movement distance of the die holding plate (13) is set to be slightly longer than the length (vertical length) of the die holding plate in the moving direction.

The lower roll (202) is provided with a lifting device (101) in which the shafts at both ends are built in the side wall of the frame (100).
It is rotatably supported by bearings (22) (22) at the upper end of the. The bearings (22) and (22) are held in the side walls of the frame (100) so as to be vertically paired with each other. Each bearing (2
2) is a lifting frame (23) which is provided below the frame and which is also paired with the frame (100) in the vertical direction, and an adjusting screw.
Connected by (24). The lifting frame (23) is connected to both ends of the input shaft (25) by a crank mechanism (26), and the input shaft (25) is interlocked with a reversible motor (27) with a speed reducer.

Therefore, when the input shaft (25) is rotationally driven by the reversible motor (27), the elevating frame (23) is vertically moved within the range from the top dead center to the bottom dead center of the crank device (26). The bearing (22) connected to this is integrally moved up and down. Moreover, the common input shaft (25) allows both side crank mechanisms (26).
Since (26) is driven, the bearing portions on both sides of the lower roll (202) are synchronously moved up and down by the same stroke.

In this lifting device (101), the position of the top dead center of the lower roll (202) can be adjusted. Therefore, the lifting frame (2
A worm wheel integrated with the adjusting screw (24) and a worm that meshes with the worm wheel are provided in the 3), and the worm wheels of the elevating frames (23) (23) built into the opposite side walls of the frame (100) are connected to each other. They are connected together by (33). Then, a handle (34) is provided at one end of the connecting shaft (33), and the adjusting screw (24) is rotated by the rotating operation of the handle (34),
As a result, the degree of screwing of the adjusting screw (24) into the bearing (22) changes, and the top dead center of the lower roll (202) can be adjusted.

The lower roll (2
The penetrating part of both end shafts of 02) and the penetrating part of the connecting shaft (33) are long holes that are vertically long and narrow so that they can move up and down by a constant stroke. In the punching main part detailed above, the flat die (1
31) is attached and fixed to the lower surface of the mold holding plate (13) by the clamp metal fittings (15) and (15) as shown in FIGS. The clamp metal fitting (15) is a mold material having a predetermined length with an L-shaped cross section, which is configured to clamp a side parallel to the traveling direction of the flat mold (131), and has a large number of required parts. Bolt (15
1) It is configured to be detachably screwed by (151).

Further, the cutting edge biting sheet (8) is a lower roll (20
2) It is glued to and fixed in a wound state. With the mold holding plate (13) set in the initial position as shown in FIGS. 6 and 9, the properness between the flat mold (131) attached to the mold holding plate (13) and the lower roll (202) is set. When the raw material paper (7) is positioned in the position, the flat blade (131) punching blade type (11) (11)
Matches the pattern given to. In this state, the reversible motor (27) is normally rotated to drive the input shaft (25) in the normal direction, and as shown in FIG. 9, the lower roll (202) is lifted and the cutting edge of the punching blade die (11) (11) is moved. Let the cutting edge bite sheet (8) bite.

If necessary, if the handle (34) shown in FIG. 8 is operated to adjust the top dead center position of the lower roll (202), the cutting edge of the punching blade die (11) (11) is adjusted. Bite sheet
(8) It is possible to optimize the degree of bite into. Next, when the servo motor (28) is driven, the upper roll (201) and the lower roll (202) are normally rotated, and the mold holding plate (13) is moved from the initial position to the final position. As a result, as shown in FIG. 10, the material paper (7), the flat mold (131) and the mold holding plate (13) move horizontally while being clamped between the upper roll (201) and the lower roll (202). Then, the products (71) (71) are punched sequentially and the lower roll (2
At the position after passing 02), the product (7) in the punching blade die (11) (11)
(1) (71) is pushed downward by the sponge layer (12).

At this time, since the surface of the sponge layer (12) in the punching blade molds (11) (11) projects below the punching blade molds (11) (11), the products (71) (71) Will be pushed below the scrap (72). Also, punching blade type (11) (11)
Since the cylindrical lower roll (202) faces the product (71) (71), the products (71) (71) tend to bend downward as shown in the figure. Is easily pushed out. Furthermore, in this embodiment, since there is a pair of elastic shafts (122) (122) in the front part of the sponge layer (12), even if the product (71) is attached to the sponge layer (12) due to static electricity, this elastic shaft (122) (122) Due to the protrusion of the shaft, it will be peeled off and the product (71)
Surely falls.

On the other hand, the punching blade die (1
1) Since the sponge layer is not provided on the outer peripheral portion of (11), the scrap (72) is held in the temporarily fixed state while biting the outer periphery of the punching blade molds (11) (11). In this state, the products (71) (71) are sequentially punched out and the flat mold (131) moves forward to the final position together with the mold holding plate (13), and the reversible motor (27) reverses the input shaft (25) by a predetermined angle. When driven, the lower roll (202) descends, and the punching blade dies (11) (11) separate from the lower roll (202). In this state, the servo motor (28) is reversely driven and the upper roll (201), the lower roll (202) and the die holding plate (13) which are transmitted to the servo motor (28) are driven to return to the initial position.

During these operations, the common servo motor (2
The upper roll (201) and the lower roll (202) are driven by 8), and the distance between the upper roll (201) and the lower roll (202) changes when the lower roll (202) moves up and down, but the input shaft (284) (285) is connected to the shaft joint (283) so that it can expand and contract,
Upper roll (201) and lower roll (2) for the servo motor (28)
02) The synchronous transmission relationship will be maintained.

As described above, the products (71) and (71) are punched, but in the first embodiment, the following devices are added. [Paper feeding device] As shown in FIG. 6, this device feeds material sheets (7) (7) disposed below and rearward of the mold holding plate (13) in the initial position.
Stock table (41) and the uppermost material sheet stacked on the stock table (41) provided at the rear end of the mold holding plate (13)
An adsorption device (42) that adsorbs only one sheet (7), and the material paper (7) that is adsorbed and held by this adsorption device (42) and sent out together with the die holding plate (13) to a lower roll (202). It consists of a pair of feeding devices (5) feeding between the mold (131).

As shown in FIG. 5, the suction device (42) is
A swing lever (431) equipped with a suction cup (432)
It is configured to oscillate at a predetermined timing by 3), and sucker (4
The suction operation by 32) is determined in relation to the operation of the drive unit (43) corresponding to the operation of the die holding plate (13). With these configurations, the uppermost material sheet (7) is attracted to the suction cup (432) and the front end of the material sheet (7) is lifted by the operation of the swing lever (431) that is swung by the drive device (43). , When the mold holding plate (13) moves in this state, the uppermost material paper
(7) is transferred forward by a certain stroke. The stock table (41) on which the stacked material sheets (7) (7) are placed is configured to be lifted by a certain stroke when the transfer of a certain number of material sheets (7) (7) is completed, Top layer material paper
(7) is always set to a height within a predetermined range.

Next, the feeding device (5) is connected to the lower roll (20
2) A support base (51) arranged so as to rise obliquely toward the front end of the mold holding plate (13) behind the mold holding plate (13), and a pair of corners of the support base (51) protruding from the upper surface of this support striking (51). Push plate (5
2) and a sabot motor (53) for rotationally driving the feed screw (54) paired with the push plate (52), and the initial position of the push plate (52) is the flat type at the initial position. The material paper (7) set in the proper position with respect to (131) is set behind the rear edge.

* Paper feeding operation When the mold holding plate (13) is in the initial position, the suction cup of the suction device (42) is located above the front end of the uppermost material sheet (7), Prior to the mold holding plate (13) starting to move forward, the suction device (42) sucks and holds the uppermost material sheet (7). When the die holding plate (13) moves forward with the punching operation, the suction device (42) causes the die holding plate (13) to move.
When the mold holding plate (13) is moved forward together with (13) and the die holding plate (13) reaches the most advanced position, the suction by the suction cup of the suction device (42) is released and the material paper (7) is held on the support base (51). It is placed on the front side of the push plate (52) located on the upper surface and in the most retracted position (initial position). At this time, the lower roll (202) descends and the flat type (1
The lower roll (202) is separated downward from the blade forming surface (132) of (31). In this state, the servo motor (53) is positively driven, the push plate (52) is moved forward by a predetermined distance, and the material paper (7) is moved.
With the front end of the flat type (131) in the initial position, the blade forming surface (13
2) Accurately position the front end of.

After this, as described above, the lower roll (202) is lifted and the punching operation proceeds. When the material paper (7) is positioned by the normal drive of the servo motor (53) and the punching operation is started, the servo motor (53) is then driven.
By the reverse drive of (53), the push plate (52) is returned to the initial position and stopped. The operation amount of the servo motor (53) is
It is set to a predetermined value in advance in relation to the initial position of (52), the initial position of the blade forming surface (132) of the flat mold (131), and the punched position of the material paper (7).

As a matter of course, the servo motor (53) is controlled by the control means (not shown), and the operation amount and the operation timing are set by the control means according to the punching conditions or punching specifications. is there. [Product Separation Device] As described above, the product (71) (71) and the scrap (72) are separated on the downstream side of the punching part,
In order to take them out separately, as shown in FIG. 6, a first belt conveyor (61) for taking out products and a second belt conveyor (62) for taking out scraps are separately arranged above and below the latter. The two-belt conveyor (62) is located below that of the former, and both descend diagonally forward. And, the rear end of the lower second belt conveyor (62) is close to the upper part of the outer periphery of the lower roll (202), and a plurality of partition plates for separating the products in each of the products (71) (71) in the column. (60) (60) is provided between the first and second belt conveyors (61) (62). These partition plates (60) are located between the columns of the punching blade molds (11) (11) of the flat mold (131).

Therefore, the products (71) and (71) punched by the flat mold (131) and the lower roll (202) are separated from the scrap (72) by the above-mentioned (131), and then the second belt conveyor. (6
2) It is transferred to the product stock section (6) through the partition plates (60) and (60) for each column, and the scrap (72) is moved to the scrap stock section (not shown) by the upper first belt conveyor (61). Be transferred to.

At this time, the scrap (72) is in a state of biting into the outer periphery of the punching blade molds (11), (11)
Upon completion of the entire punching in (7), by its own weight, or
It will be peeled downward from the flat mold (131) by a separating means (not shown). The latter separating means for forcibly peeling off the scrap (72) has a structure in which the flat die (131) that moves in a straight line is located at a position after the product separation point and the punching die dies (11) (11) are arranged in a row. A separation claw may be positioned between them.

While the flat die (131) passes above the separating claw, the scrap (72) which has been bitten into the outer periphery of the punching blade die (11) (11) is peeled downward. Because. [Blade tip bite sheet (8)] When punching a product (71) with a fold, the blade bite sheet (8) has a recess formed at the location corresponding to the crease edge. To do.

As a method for forming this recess, FIG.
As shown in, the cutting edge biting sheet (8) is formed by partially cutting it. For this purpose, as shown in FIG. 12, a substrate (89) which becomes the blade biting sheet (8), a protective sheet (88) which is detachably attached to the surface, and a back surface of the substrate (89). A composite sheet material (80) comprising a release sheet (86) attached to the formed adhesive layer (87) is used. A peeling layer is formed on the front surface of the substrate (89), and a weak adhesive layer (881) is formed on the back surface of the protective sheet (88).
And the protective sheet (88) are attached to each other in a weakly adhesive state.

When this cutting edge bite sheet (8) is used, the crease blade (1
A cutout area (801) having a constant width corresponding to the width of the fold is formed on the substrate (89) so as to coincide with the position of (11). The composite sheet material (80) in which the ablation area (801) necessary for the substrate (89) is formed,
As shown in FIG. 13, a plurality of removable positioning pins (1
(30) (130) is planted in a required portion of the substrate (10) so that it is positioned and detachably attached to the blade forming surface (132) of the flat die (131), and the release sheet ( 86) is peeled off, and in this state the lower roll (2
02) is pressed against the composite sheet material (80) and the lower roll
The mold holding plate (13) holding the (202) and the flat mold (131) is synchronously driven on a trial basis. As a result, the substrate (89) as the cutting edge biting sheet (8) is attached to the surface of the lower roll (202). Since the substrate (89) and the protective sheet (88) are adhered to each other in a weakly adhesive state, the protective sheet (88) is peeled from the substrate (89) by the test drive. When the mold holding plate (13) is test driven to the final position, the entire substrate (89) is accurately positioned on the surface of the lower roll (202) in relation to the flat mold (131).

After this, from the flat type (131) side, the protective sheet (88)
Remove this flat type (131) and blade bite sheet
The substrate (89) as (8) is set in a punchable state. In this case, when the adhesive strength at both ends of the substrate (89) is insufficient, both ends of the substrate (89) are also adhered to the surface of the lower roll (202) by an adhesive tape to reinforce.

When the product is punched by the cutting edge biting sheet (8) of the above type and the blade forming surface (132) equipped with the folding blade (111) in the same manner as when punching the above-mentioned playing card, the crease is formed. Products with (71) (71) are punched. At this time, the die holding plate (13) with the flat die (131) attached and the lower roll (20
Since the peripheral speed of the surface of the blade biting sheet (8) attached to the surface of (2) matches, the crease blade (111) in the punching blade mold (11) of the blade mold forming surface (132) And the recessed portion (80) formed in the cutting edge biting sheet (8), that is, the cutout region (801) as the recessed portion (80) in the substrate (89), always always coincides exactly.

In this embodiment, the upper roll (201) also rotates in synchronization with the lower roll (202) and the upper roll (201), so that the punching operation of the entire material sheet (7) is performed. When the roll is completed, the upper roll (201) is also stopped in synchronization with the mold holding plate (13) and the lower roll (202) .Therefore, an extra rotation operation due to inertia like when the upper roll is a free roll is performed. However, it is possible to prevent the inconvenience as described above due to the relative movement between the die holding plate (13) and the upper roll (201) that is in contact with the upper surface of the die holding plate.

[Another Example of Cutting Edge Biting Sheet (8)] Product (7
As the cutting edge biting sheet (8) used when a fold is required in a part of (1), a configuration as shown in FIG. 14 can also be adopted. In this case, the cutting edge biting sheet (8) is adhered to the surface of the lower roll (202) as a synthetic resin sheet with an adhesive layer formed on the back surface thereof. After that, a pair of thin strips (802) (802) are opened at a predetermined gap corresponding to the crease cutting edge of the flat mold (131) blade forming surface (132) and the surface of the synthetic resin sheet is opened. Stick it on.

Blade edge biting sheet configured in this way
Also in the case of (8), the entire contour of the product (71) is punched by the punching blade die, and a fold line is formed at a portion which coincides between the strip plates (802) (802). [Others] The diameter of the lower roll (202) depends on the product (71) (7
From the standpoint of separation of 1) and scrap (72), it is preferably about 500 mm or less, and conversely, if it is too small, there is a problem in the strength surface (rigidity during punching), so about 400 mm is more desirable.

A crank mechanism is used as the lifting device (101) for the lower roll (202), but a cam mechanism or the like can also be used as long as a similar lifting operation is performed. In the case of this cam mechanism, even when the cam is continuously rotated in one direction, the time during which the lower roll (202) is maintained at the top dead center position or the bottom dead center position can be lengthened, and the time can be adjusted depending on the cam shape. .

Further, when using the adhesive blade biting sheet (8) of the above embodiment, it is necessary to peel the blade biting sheet (8) from the lower roll (202) in order to change the flat type (131). However, depending on the degree of adhesion between the two, peeling may be difficult. To ensure peeling in this case, see FIG.
The configuration shown in can be adopted. In this example, a plate-shaped scraper (81) is provided obliquely below the second belt conveyor (62) for discharging the product and on the side of the lower roll (202). This scraper (81) is set to substantially match the length of the lower roll (202) and is set larger than the lateral width of the cutting edge biting sheet (8), and one edge of the scraper swings near the outer periphery of the lower roll (202). It is rotatably supported. The free end side edge of the shaft support opposite to the free end side is set to be in contact with the lower roll (202) in a manner coinciding with the generatrix of the lower roll (202). Further, the scraper (81) is in a state where the free end side edge is in contact with the surface of the lower roll (202) by a driving means (84) including a crank mechanism (842) and a driving source (841), It is moved away from the surface. Then, normally, the scraper (81) is set in the separated state. A spring (85) is provided at the connecting portion between the output shaft of the crank mechanism and the scraper (81), and this spring causes the edge of the scraper (81) on the free end side to move to the lower roll (202) at a predetermined pressure. ) Is pressed to the surface.

Therefore, during the punching operation, the edge of the scraper (81) on the free end side is separated from the surface of the lower roll (202) and does not hinder the punching operation. When changing the punching conditions, insert the blade bite sheet (8) into the lower roll (2
In order to separate from the surface of (02), the driving means (84) is operated to set the free end side edge of the scraper (81) against the surface of the lower roll (202), and the lower roll ( 202)
To rotate. In this state, the cross section of the scraper (81) is in a posture inclined with respect to the outer circumference of the cross section of the lower roll (202) in a substantially cutting line direction. And the scraper in this inclined posture
Lower roll (2) so that it rotates toward the free end side edge of (81).
When the rotation direction of 02) is set, the blade biting sheet (8) adhered by the rotation is scraped off over the entire area by the free end side edge of the scraper (81).

In this product, the left and right widths of the scraper (81) are substantially matched with the length of the lower roll (202), but the scraper (81) can be swung freely and can be moved in the left and right directions. It may be configured so as to be pivotally supported. In this case, rotate the lower roll (202) while scraping the scraper on this surface.
When the free end side of (81) is pressed and this scraper (81) is moved left and right, the entire area of the cutting edge biting sheet (8) can be peeled off.

In the above embodiment, the upper roll (201),
Although the lower roll (202) and the mold holding plate (13) are synchronously driven by a common servomotor, the respective units may be driven by individual driving devices and controlled so as to be synchronously operated. For the purpose of improving the precision of the punching operation, only the lower roll (202) and the die holding plate (13) may be driven in synchronization.

[Brief description of drawings]

[Fig. 1] Relationship diagram between product (71) (71) and scrap (72) by conventional punching method

FIG. 2 is an explanatory view of the principle of a conventional punching method.

FIG. 3 is an explanatory view of the principle of the punching method and punching device of the present invention.

FIG. 4 is a flat type (131) in which a band-shaped blade is planted as a rectangular ring.
Perspective view from the back

FIG. 5 is an enlarged cross-sectional view of the main part thereof.

FIG. 6 is a sectional view of the first embodiment.

FIG. 7 is an explanatory diagram of a synchronous drive mechanism.

FIG. 8 is a sectional view taken along line XX of the embodiment.

FIG. 9 is a cross-sectional view of essential parts in the early stage of the punching process.

FIG. 10 is a sectional view of an essential part during the punching process.

FIG. 11 is a cross-sectional view of main parts when punching a product having a fold line.

FIG. 12 is a sectional view of a composite sheet (80) for a cutting edge biting sheet (8) used for this.

FIG. 13 is an explanatory diagram for winding the blade biting sheet (8)

FIG. 14 is an explanatory diagram of winding another blade bite sheet (8)

FIG. 15 is an explanatory view of an embodiment equipped with a scraper (81).

[Explanation of symbols]

 (131) ・ ・ ・ Flat type (7) ・ ・ ・ Material paper (71) ・ ・ ・ Product (201) ・ ・ ・ Upper roll (202) ・ ・ ・ Lower roll (11) ・ ・ ・ Blade type (132)・ ・ ・ Blade forming surface (13) ・ ・ ・ Mold holding plate (8) ・ ・ ・ Cutting edge sheet (81) ・ ・ ・ Scraper

Claims (4)

[Claims] 1. A flat blade-shaped flat surface (131) having a blade-shaped surface
In the device that presses the material paper (7) on the (132) by the cylindrical surface and punches the product (71) (71) of a predetermined shape from the material paper (7), the lower surface is the blade forming surface (132 ) And flat type
(131) is attached to the lower surface of the mold holding plate (13) that is horizontally reciprocally movable, and the rotatable upper roll (201) is in contact with the mold holding plate (13) from above, and the outer peripheral surface. The rectangular blade tip biting sheet (8) is removably wrapped around the lower roll (20) that comes in contact with the blade mold forming surface (132) of the flat mold (131) from below.
2) is provided, and the mold holding plate (13) and the lower roll (202) are synchronously reciprocally driven, and the mold holding plate (1
A punching device in which the linear movement speed of 3) and the peripheral speed of the surface of the cutting edge biting sheet (8) attached to the outer peripheral surface of the lower roll (202) are matched. 2. The upper roll (201) is configured to be driven synchronously with the mold holding plate (13), and the peripheral speed of the upper roll (201) and the linear movement speed of the mold holding plate (13) are matched. The punching device according to claim 1. 3. The structure according to claim 1, wherein the lower roll (202) can be moved up and down, and the lower roll (202) is moved away from the flat mold (131) when the mold holding plate (13) is driven to return. The punching device according to any one of 1. 4. A plate-shaped scraper (8) near the outer periphery of the lower roll (202) along the generatrix of the lower roll (202) and obliquely to the arc of the cross section.
The punching device according to claim 1, wherein the scraper (81) is provided with (1), and a free end side edge of the scraper (81) can be brought into contact with and separated from the surface of the lower roll (202).