JP7209407B1 - punching machine - Google Patents

Abstract

A punching machine capable of reliably conveying a frame is provided. A female mold (1) having a receiving surface (13) on which printing paper (S) having a blank (B) and a frame (F) connected by a nick (N) is placed, and an opening (11) for dropping the blank (B); A male mold 2 for pushing the printing paper S placed on the female mold 1 to pull out the blank B, and a front side edge Sf of the frame F, holding the frame F from which the blank B has been removed, parallel to the receiving surface 13. and a gripping portion G that conveys in the conveying direction X, and protrudes toward the male mold 2 at a position adjacent to the rear side of the opening 11 along the conveying direction X on the receiving surface 13 and intersects the conveying direction X. A mountain-shaped first receiving portion 141 having a first ridgeline 15 is formed, and the protrusion height of the first receiving portion 141 decreases toward the front side and the rear side across the first ridgeline 15, and the male mold 2 A punching machine K provided with a first pressing portion 221 that forms a first chevron portion F1 on the frame body F together with the first receiving portion 141 at a position facing the first receiving portion 141 . [Selection drawing] Fig. 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punching machine used for manufacturing paperboard such as various paper containers for foodstuffs and cosmetics.

Conventionally, as a technique related to such a punching machine, there is, for example, the following patent document 1 (see paragraphs [0009], [0021] to [0026] of the specification, FIGS. 2 to 5, etc.). .

The technology according to Patent Document 1 includes a blanking step of punching a blank 100b from a sheet material 100a, a blanking step of cutting off the blank 100b punched out from the sheet material 100a by a blanking die 30 and a blanking knife 50 below the blanking die 30, and a blanking process. and a conveying step of conveying the scrap 100c from which the blank 100b has been separated above the blanking knife die 50 in a predetermined direction. In this prior art, in order to prevent the punched waste 100c from hanging down due to its own weight in the conveying process and interfering with the blanking knife die 50, the punched waste 100c is formed with a droop prevention groove 101 for increasing strength in the punching process. It is something to do.

Specifically, the punching die 30 used in the punching process includes a long plate-shaped substrate 31, a cutting edge 32 provided on the substrate 31, a first crease portion 33 for forming a crease in the blank 100b, and a second corrugated portion 34 arranged on the surface side of the substrate 31 so as to form the drooping prevention groove 101 in the scrap 100c.

A face plate 35 is provided below the punching die 30 . A chamfering die 36 is provided on the face plate 35, and grooves 36a are formed in the chamfering die 36 so as to face the second creases 34, respectively. By pressing the punching die 30 against the face plate 35 through the sheet material 100a, a plurality of hanging prevention grooves 101 are formed in the sheet material 100a.

For example, the second corrugated portions 34 are provided at four locations spaced apart in the longitudinal direction on each of the long side of the substrate 31 on the upstream side in the conveying direction of the sheet material 100a and the central position, and eight hanging locations. The prevention groove 101 is formed extending in a direction orthogonal to the conveying direction of the sheet material 100a. By forming the hanging-preventing groove 101 in this way, the strength of the punched waste 100c is increased, and interference with the face plate 35 is prevented by avoiding hanging due to its own weight when the punched waste 100c is conveyed to the recovery position. It is said that

JP 2014-223681 A

The drooping prevention groove 101 in the prior art is formed on the side of the portion of the frame body left as the blank 100c along the conveying direction with respect to the portion where the blank 100b was punched. Since this position is a position where the frame is continuous along the conveying direction, when the frame is conveyed from the top of the face plate 35, the droop prevention groove 101 itself interferes with the edge of the opening of the face plate 35. never do.

The place where the interference with the face plate 35 should be prevented is the area between the two hanging prevention grooves 101 adjacent in the direction perpendicular to the conveying direction. The width of this region is narrow and does not have an area large enough to form the anti-sagging groove 101 . Therefore, in the prior art, the droop prevention groove 101 is not formed at this position, and the rigidity of the region adjacent to this is increased to prevent interference with the frame.

However, since the area of the frame that may interfere with the face plate has a narrow width and low rigidity, it is presumed that this area can easily bend. Therefore, even in this conventional punching machine, the interference of the frame with the face plate cannot be reliably avoided.

As described above, there is still room for improvement in the above-described prior art due to various problems, and there has been a demand for a punching machine capable of reliably conveying a frame.

(characteristic configuration)
The characteristic configuration of the punching machine according to the present invention is as follows:
a female mold having a receiving surface on which printing paper is placed, which is composed of a blank and a frame connected to each other by a nick portion, and an opening through which the blank is dropped;
a male mold for pressing the printing paper placed on the female mold to separate the blank from the printing paper;
a gripping portion that grips the front edge of the frame and transports the frame after the blank is separated along the transport direction parallel to the receiving surface;
A mountain-like shape having a first ridge line protruding toward the male mold and extending while intersecting the conveying direction at a position of the receiving surface adjacent to the rear side along the conveying direction with respect to the opening of the receiving surface. a first receiving portion is formed;
The protrusion height of the first receiving portion decreases toward the front side and toward the rear side along the conveying direction across the first ridgeline,
in that a first pressing portion is provided at a position of the male die facing the first receiving portion to sandwich the frame body together with the first receiving portion to form a first chevron portion on the frame body; be.

(effect)
With this configuration, when the male die is pressed against the female die to punch out the blank, the frame of the printing paper is sandwiched between the first receiving portion of the female die and the first pressing portion of the male die. As a result, a mountain-shaped first mountain-shaped portion is formed at a position adjacent to the rear side of the frame along the conveying direction with respect to the position of the blank. The first chevron portion protrudes toward the male mold, and the first ridge line, which is the top portion, intersects the conveying direction.

By forming such a first chevron portion, when the frame is conveyed after punching the blank, the first chevron portion acts as a wing, and the frame separates from the female mold and floats. As a result, even the printing paper with only the frame body can be reliably transported and removed without interfering with a part of the female die.

Moreover, the rigidity of this portion is increased by forming the first chevron portion on the frame. Therefore, when the frame is pulled in the conveying direction by the gripping portion, downward bending of the first chevron portion of the frame body is suppressed, and the first chevron portion does not interfere with the edge of the opening of the female mold. transported away without

(characteristic configuration)
In the punching machine according to the present invention, the first pressing portion includes an elastic member that deforms according to the chevron shape of the first receiving portion when holding the frame between itself and the first receiving portion. It is convenient to have

(effect)
If the first pressing portion has an elastic member that can be deformed according to the shape of the first receiving portion, it is not necessary to adapt the shape of the pressing surface of the first pressing portion to the shape of the first receiving portion in advance. . For example, the first pressing portion can be simply configured as a flat surface. That is, since the first pressing portion can be configured regardless of the shape of the first receiving portion, the configuration of the male mold can be simplified.

Furthermore, if the first pressing portion is deformable, it is not necessary to strictly determine the position and size of the first pressing portion facing the first receiving portion. This further simplifies the configuration of the punching machine.

(characteristic configuration)
In the punching machine according to the present invention, a region of the receiving surface adjacent to the side of the opening with respect to the conveying direction and adjacent to the opening located farthest along the conveying direction. A mountain-shaped second receiving portion is formed that protrudes toward the male mold and has a second ridge that extends from the area adjacent to the opening on the rearmost side,
A second pressing portion that sandwiches the frame body together with the second receiving portion and forms a second chevron portion on the frame body is formed at a portion of the male mold that faces the second receiving portion. It is convenient.

(effect)
In this configuration, the female mold is provided with a second mountain-shaped receiving portion extending over a plurality of openings in order to form the second mountain-shaped portion along the conveying direction in the frame, and the male mold is provided with the second It forms a second pressing portion facing the receiving portion.

The second chevron portion formed on the frame by the second receiving portion and the second pressing portion enhances the overall rigidity of the frame along the transport direction of the frame. When the frame is pulled and conveyed by the gripping portion, the frame rises due to the levitation effect of the first chevron portion.

If the rigidity of a part of the frame is insufficient, only the specific first chevron portion will be in a posture suitable for levitation, and the other regions will be in a posture where the levitation effect cannot be exhibited due to the bending of the frame. There is fear. In that case, not only will the improperly positioned first chevron portion not float, but conversely, the angle of attack with respect to the airflow will be in a negative state, and the first chevron portion will drop rapidly, possibly interfering with the receiving surface of the female die. occurs.

Therefore, in this configuration, the female mold is formed with the second receiving portions extending across the plurality of openings formed along the conveying direction, and the male mold is formed with the corresponding second pressing portions. By doing so, the rigidity of the press-processed frame body is increased, and the whole is maintained in one plane. As a result, even if the lift forces generated by the first chevrons formed in a plurality of portions of the frame are different, the frame floats from the female die while maintaining its flat state. The transportation work of the product becomes reliable.

(characteristic configuration)
In the punching machine according to the present invention, the second pressing portion includes an elastic member that deforms according to the chevron shape of the second receiving portion when the frame is sandwiched between the second pressing portion and the second receiving portion. It is convenient to have

(effect)
If the second pressing portion has an elastic member that can be deformed according to the shape of the second receiving portion, it is not necessary to match the shape of the pressing surface of the second pressing portion to the shape of the second receiving portion in advance. . For example, the second pressing portion can be simply configured as a flat surface. That is, since the second pressing portion can be configured regardless of the shape of the second receiving portion, the configuration of the male mold can be simplified.

Furthermore, if the second pressing portion is deformable, it is not necessary to strictly determine the opposing position and size of the second pressing portion with respect to the second receiving portion. This further simplifies the configuration of the punching machine.

A perspective view showing the configuration of a blanking die in the punching machine of the present invention. Explanatory diagram showing the configuration of the punching machine Explanatory diagram showing the operating state of the female and male dies A perspective view showing the configuration of printing paper. Explanatory drawing showing the configuration according to another embodiment of the first receiving part

〔overview〕
An outline of a punching machine K according to the present invention is shown in FIGS. 1 and 2. FIG. FIG. 2 shows the overall construction of the punching machine K, and FIG. 1 shows the blanking section K4.

As shown in FIG. 2, the punching machine K includes, in order from the upstream side, a paper feed section K1, a punching section K2, a missing page section K3, a blanking section K4, and a paper discharge section K5. A drive chain C driven by a motor M is provided over these parts, and the printing paper S is gripped by claws of gripping portions G provided at predetermined intervals on the drive chain C and transported in the above order.

As shown in FIG. 1, the claws G1 of the gripping portion G grip the leading edge Sf of the printing paper S linearly or in a scattered manner. This reduces deformation of the printing paper S even when the printing paper S is conveyed at high speed.

The printed paper S is conveyed to the next punching section K2, and the outer circumference of the blank B, which is used as a paper container or the like, is cut out. A portion of the printing paper S excluding the blank B becomes a frame F. As shown in FIG. However, the frame F and the blank B are maintained in a state of being connected by several nicks N. A punching die K21 made of plywood or the like is arranged above the punching part K2. The punching die K21 has a plate-like substrate a, on which a cutting edge b that matches the shape of the blank and a crease c that forms a crease at a predetermined position of the blank B are implanted. On the other hand, a face plate K22 that moves up and down by a toggle mechanism t is provided below the punching part K2. After the printing paper S stops at a predetermined position, the face plate K22 is lifted, and a blank B is punched out of the printing paper S by the ruled lines c and the face plate e.

In the next missing page part K3, a missing page female mold K31 having a hole g is placed below, and a missing page male mold K32 is placed above. By lowering the missing page male mold K32, the missing page pressing portion i is inserted into the hole portion g, and hole waste h is removed at that time.

At the next blanking portion K4, the blank B is removed from the printing paper S, and the frame body F, which is the remaining portion, is formed with a first mountain-shaped portion F1 and the like. For this purpose, a blanking female die 1 (hereinafter referred to as "female die 1") is placed below, and a blanking male die (hereinafter referred to as "male die 2") which moves up and down is placed above. ing. After that, the frame F is conveyed to the paper discharge section K5.

The female die 1 is a plate-like member and has an opening 11 for dropping the punched blank B downward. Guides 12 for aligning the blanks B falling through the opening 11 are provided at several locations along the edge of the opening 11 . A peripheral portion of the opening 11 serves as a receiving surface 13 for receiving the frame F of the printing paper S. As shown in FIG. The male die 2 is provided with a pressing die 21 that can be inserted into the opening 11 while pushing down the blank B, and a pressing portion 22 that is provided at a predetermined position adjacent to the pressing die 21 and presses the printing paper S. there is

When the positioning of the printing paper S transported from the missing page section K3 is completed, the upper male die 2 descends and pushes down the blank B through the opening 11 of the female die 1. As shown in FIG. The driving speed is about 100 to 150 sheets per minute. The knocked-down blanks B are piled up on a pallet P1 installed below the female mold 1.例文帳に追加The frame F from which the blanks B have been knocked down is then transported to the paper discharge section K5 and piled up on another pallet P2. At this time, the frame F is rapidly accelerated, and its conveying speed is about 300 cm/sec.

The gripping portion G moves to a position slightly higher than the receiving surface 13 so that the frame F does not come into contact with the edge of the opening 11 of the female mold 1 . Therefore, while the gripping portion G is moving, the female mold 1 is lowered to the retracted position.

[Formation of the first chevron portion on the frame]
In the blanking part K4 of the present embodiment, in addition to punching the blank B, the first chevron part F1 is formed at a predetermined position of the frame body F. As shown in FIG. Therefore, as shown in FIGS. 1, 3, and 4, the male mold 2 is provided on the receiving surface 13 at a position adjacent to the opening 11 on the rear side along the conveying direction X. A first receiving portion 141 projecting toward is formed. The first receiving portion 141 has a first ridgeline 15 that extends while intersecting the transport direction X, and has a mountain-like shape in a cross-sectional view orthogonal to the first ridgeline 15 .

The cross-sectional shape of the first receiving portion 141 is formed in an upward convex shape, and the protrusion height is formed highest at the portion of the first ridge line 15 . In the front side of the frame F along the transport direction X with respect to the first ridge line 15, that is, in the area on the side closer to the gripping portion G from the first ridge line 15, the height decreases as the distance from the first ridge line 15 increases. . On the other hand, the rear side along the conveying direction X, that is, the area away from the first ridgeline 15 in the opposite direction to the gripping portion G, also decreases in height as the distance from the first ridgeline 15 increases. In this embodiment, as shown in FIG. 1, both front and rear sides of the first ridge line 15 are formed as inclined planes.

Such a first receiving portion 141 is provided at a position adjacent to the rear side of the receiving surface 13 along the transport direction X with respect to the opening 11 . As shown in FIG. 1 , four first receiving portions 141 are formed along a direction intersecting the transport direction X for each opening 11 . These four first receiving portions 141 are formed continuously over the entire width of the opening 11 when viewed along the transport direction X. As shown in FIG. That is, when the frame F is pulled in the conveying direction X, it is the edge located on the rear side of the opening 11 that is likely to interfere with the edge of the opening 11 of the female die 1. The first chevron portion F1 is formed over the entire length of the float to enhance the levitation effect.

Here, the characteristics of the paperboard used for the printing paper S will be described. Paper is made by passing pulp through a paper machine and winding it into a large roll. Pulp fibers flow in the direction in which paper is manufactured, and paper grain occurs. A roll of paper is cut into paperboard, and depending on the relationship between the vertical and horizontal dimensions of the paperboard and the grain, the paperboard is produced with either a long grain or a long grain.

Specifically, a paperboard with a grain along the long side is a paperboard with a long grain, and a paperboard with a grain along the short side is a paperboard with a cross grain. A cardboard with a vertical grain is easy to fold around the long side, and a paperboard with a horizontal grain is easy to fold around the short side. Paperboards with long grains are often used for paper containers for small items such as foodstuffs and cosmetics due to the convenience of production machines such as printing machines. When rotary printing is performed using a general roll cylinder, printing paper S of good quality can be obtained by using cardboard so as to be rolled around the grain.

The paperboard shown in the present embodiment is paper with long grains, and the paper is conveyed in a direction perpendicular to the long side direction, that is, in a direction perpendicular to the grain. The paperboard is originally easy to bend with the grain as the axis, and the frame body F whose overall rigidity is lowered due to the blank B being pulled out tends to bend downward toward the rear side. In this embodiment, in order to prevent such drooping, the first mountain-shaped portion F1 is formed particularly in the area adjacent to the rear side of the opening 11 to float.

In order to form the first receiving portion 141 on the receiving surface 13 of the female mold 1, for example, as shown in FIG. It is convenient to configure it so that it is possible. For example, the receiving surface 13 may be formed with a concave portion 13a for specifying the fixed position of the first member 1a, and the concave portion 13a may be fitted therein.

With the configuration in which the first member 1a is fitted into the concave portion 13a, the position of the first member 1a will not be displaced even if it is repeatedly pressed by the male die 2 . Further, the shape of the upper surface of the first member 1a may be composed of two planes, as shown in FIG. As shown in (b), a linear projection 16 may be provided at the position of the ridgeline. Since the degree of levitation of the frame F changes depending on the weight and shape of the frame F and the transport speed, the effect of preventing the frame F from interfering with the female die 1 is to enable selection of an appropriate first member 1a. can be further enhanced.

Note that the first receiving portion 141 may be formed integrally with the material forming the female mold 1 . With this configuration, the strength of the first receiving portion 141 is sufficient, the position of the first receiving portion 141 is not displaced with respect to the opening 11, and the first chevron portion of the optimum shape for the frame F is formed. F1 can be formed.

[Blanking male type]
As shown in FIGS. 1, 3 and 4, a male mold 2 is provided at a position facing the female mold 1. As shown in FIGS. The male mold 2 can move up and down with respect to the female mold 1, and when it is lowered, it removes the blank B from the printing paper S and forms the first chevron F1 in the frame body F. For this purpose, a pressing portion 22 is provided at a position facing the blank B in the male mold 2, and a frame body F is sandwiched together with the first receiving portion 141 at a position facing the first receiving portion 141 to form a frame. The body F is formed with a first pressing portion 221 forming a first chevron portion F1.

The first pressing portion 221 includes an elastic member that deforms according to the mountain shape of the first receiving portion 141 when pressing the frame F. As shown in FIG. In this embodiment, an abutting member 22b made of an elastic member is attached to a block-shaped pressing portion main body 22a fixed to the male mold 2. As shown in FIG. This attachment is by an appropriate method such as adhesion.

A portion of the contact member 22b that contacts the frame F may be configured as a simple plane, for example. In this case, first, the entire contact surface of the contact member 22b contacts the frame F, and as the pressing against the first receiving portion 141 progresses, the frame F strongly presses against the ridgeline of the first receiving portion 141. and the frame F begins to bend at a position corresponding to the ridgeline. Accordingly, the elastic member is deformed along the shape of the first receiving portion 141, and the frame body F is formed with the first chevron portion F1.

If the contact member 22b made of an elastic member is used to configure the first pressing portion 221, the shape of the pressing surface of the contact member 22b does not need to match the shape of the first receiving portion 141 in advance. For example, the contact member 22b can be simply configured as a simple rectangular parallelepiped. Since the first pressing portion 221 can be configured regardless of the shape of the first receiving portion 141 in this way, the configuration of the male mold 2 can be simplified.

Furthermore, if a portion of the first pressing portion 221 is deformable, it is not necessary to strictly determine the facing position and size of the first pressing portion 221 with respect to the first receiving portion 141 . Thereby, the configuration of the punching machine K can be further simplified.

In this embodiment, as shown in FIGS. 1 and 3, in addition to the first pressing portion 221, another auxiliary pressing portion 223 is provided. The auxiliary pressing portion 223 is provided at a position adjacent to the first pressing portion 221, for example. The auxiliary pressing portion 223 holds the frame F between itself and the receiving surface 13 of the female die 1 to stabilize the punching operation of the blank B with the pressing die 21 .

In the blanking section K4 having the female mold 1 and the male mold 2 having the above structure, the male mold 2 is lowered following the completion of the transportation of the printing paper S from which the holes h have been removed in the missing page portion K3. 3(a) shows the state before the male mold 2 is lowered, and FIG. 3(b) shows the state after the male mold 2 is lowered. The elastic abutting member 22b of the first pressing portion 221 presses the frame F, and cooperates with the first receiving portion 141 to form the first chevron F1 on the frame F as shown in FIG. When the male die 2 is further lowered, the pressing die 21 pulls out the blank B, leaving the frame F on the receiving surface 13 of the female die 1 . As a result, a mountain-shaped first mountain-shaped portion F1 is formed at a position adjacent to the position of the blank B in the frame F on the rear side along the transport direction X. As shown in FIG. The first chevron portion F1 protrudes toward the male die 2, and the ridge line, which is the top portion, intersects the conveying direction X. As shown in FIG.

When the removal of the blank B is completed, the gripping part G rises to the operating position and conveys the frame F. Since the first chevron portion F1 is formed, when the frame F is conveyed after punching the blank B, the first chevron portion F1 acts as a wing, and the frame F is separated from the female die 1. float up. Specifically, as shown in FIG. 4, when the airflow passes through the first mountain-shaped portion F1, the airflow is once deflected upward along the surface shape. As a result, the air pressure on the upper surface of the first chevron portion F1 is reduced.

On the other hand, the air pressure on the back surface of the first chevron portion F1 is the same as the air pressure around the frame F, or slightly higher than that. When the frame F is removed from the female mold 1 by the gripping part G, the gripping part G rises slightly and then begins to move in the conveying direction X. Therefore, when the frame body F starts to be pulled, the rear edge portion is lowered with respect to the front edge portion. Therefore, the airflow acts as a positive pressure on the lower surface side of the frame F, and the pressure difference between the front and back sides of the first ridged portion F1 tends to widen. Such a levitation effect is exhibited particularly well when the front and rear regions of the first chevron F1 are open and the first chevron F1 acts as if it were a wing. Therefore, the shape of the area left as the frame F is narrow along the transport direction X, and the longer it extends in the direction orthogonal to the transport direction, the higher the levitation effect. In this manner, the frame F is easily floated during transportation, and can be securely transported and removed without interfering with the opening 11 of the female die 1 or the like.

Further, the rigidity of this portion is increased by forming the first chevron portion F1 on the frame body F. Therefore, when the frame F is pulled in the transport direction X by the gripping portion G, for example, a portion of the first chevron portion F1 does not bend downward. Therefore, the first chevron F1 is less likely to interfere with the edge of the opening 11 of the female mold 1, and the frame F can be smoothly transported and removed.

[Formation of the second chevron portion on the frame]
In the punching machine K according to the present embodiment, as shown in FIGS. 1 and 4, the female die 1 and the male die 2 of the blanking portion K4 are used to form a part of the frame F in addition to the first chevron portion F1. A second mountain-shaped portion F2 having a ridgeline along the transport direction X is formed in the portion. Specifically, the area adjacent to the side of the opening 11 with respect to the conveying direction X in the receiving surface 13 and the area adjacent to the opening 11 on the farthest side along the conveying direction X to the area closest to the opening 11 An elongated second receiving portion 142 is formed over a region adjacent to the opening 11 on the rear side.

Such second receiving portions 142 are provided on both sides of the blanks B provided in three rows with respect to the transport direction X of the frame F. As shown in FIG. Therefore, a total of four second receiving portions 142 are provided. The second ridgeline Fb extends over the entire length of each second receiving portion 142 , and the second receiving portion 142 has a mountain-shaped cross-sectional shape protruding toward the male mold 2 . In this embodiment, as shown in FIG. 1, the second receiving portion 142 has a triangular cross-section with two planes.

On the other hand, the male mold 2 has a similarly elongated second pressing portion 222 formed at a portion facing the second receiving portion 142 . As with the first pressing portion 221 , the second pressing portion 222 is configured by attaching a contact member 22 b made of an elastic member to a block-shaped pressing portion main body 22 a fixed to the male die 2 . As a result, the second pressing portion 222 can be configured regardless of the shape of the second receiving portion 142, so the configuration of the male mold 2 can be simplified. In addition, it is not necessary to strictly determine the opposing position and size of the second pressing portion 222 with respect to the second receiving portion 142, and the configuration of the punching machine K can be simplified.

As shown in FIG. 4, the second chevron portion F2 formed on the frame F by the second receiving portion 142 and the second pressing portion 222 increases the overall rigidity of the frame F along the transport direction X. As shown in FIG. The frame F floats due to the effect of the first chevron F1 when it is pulled by the grip G, but the second chevron F2 maintains the entire frame F flat at that time.

If the rigidity of a part of the frame F is insufficient, the frame F will be bent, and the relative postures of the respective first chevrons F1 with respect to the transport direction X will be different. As a result, there is a possibility that only the specific first chevron portion F1 will be in a posture suitable for levitation, and other regions will be in a posture where the levitation effect cannot be exhibited due to the bending of the frame body F. In this case, the first angled portion F1 with an inappropriate posture will not only not float, but also will have a negative angle of attack with respect to the airflow, causing the first angled portion F1 to drop rapidly and cause the opening 11 of the female mold 1 to fall. There is a risk of interference with the edge of the

In this configuration, the female mold 1 is formed with the second receiving portions 142 extending across the plurality of openings 11 formed along the conveying direction X, and the male mold 2 is provided with the corresponding second receiving portions 142 . By forming the pressing portion 222, the rigidity of the pressed frame body F is increased, and the whole is maintained in one plane. As a result, each of the first chevrons F1 formed on the frame F exhibits the same floating effect. Further, even if the levitation effects produced by the respective first chevrons F1 are different, the frame F floats while maintaining its flat state, so that the frame F does not interfere with the female die 1. The transportation work becomes reliable.

INDUSTRIAL APPLICABILITY The punching machine according to the present invention can be applied, for example, to a device for punching out blanks for various paper containers such as foodstuffs and cosmetics from printed paper.

1 female mold 11 opening 13 receiving surface 141 first receiving portion 142 second receiving portion 15 first ridgeline 2 male mold 221 first pressing portion 222 second pressing portion B blank F frame body F1 first chevron portion Fb second ridgeline G Grab portion K Punching machine N Nick portion S Printed paper Sf Leading edge portion X Conveying direction

Claims (4)

a female mold having a receiving surface on which printing paper is placed, which is composed of a blank and a frame connected to each other by a nick portion, and an opening through which the blank is dropped;
a male mold for pressing the printing paper placed on the female mold to separate the blank from the printing paper;
a gripping portion that grips the front edge of the frame and transports the frame after the blank is separated along the transport direction parallel to the receiving surface;
A mountain-like shape having a first ridge line protruding toward the male mold and extending while intersecting the conveying direction at a position of the receiving surface adjacent to the rear side along the conveying direction with respect to the opening of the receiving surface. a first receiving portion is formed;
The protrusion height of the first receiving portion decreases toward the front side and toward the rear side along the conveying direction across the first ridgeline,
A first pressing portion is provided in the male mold at a position facing the first receiving portion to sandwich the frame together with the first receiving portion to form a first chevron portion on the frame. machine. 2. The punch according to claim 1, wherein the first pressing portion includes an elastic member that deforms according to the chevron shape of the first receiving portion when the frame is sandwiched between the first pressing portion and the first receiving portion. machine. A region of the receiving surface that is adjacent to the side of the opening with respect to the conveying direction and that is the rearmost region from a region adjacent to the opening that is furthest forward along the conveying direction. forming a mountain-shaped second receiving portion having a second ridge extending over an area adjacent to the opening and protruding toward the male mold;
A second pressing portion that sandwiches the frame body together with the second receiving portion and forms a second chevron portion on the frame body is formed at a portion of the male mold that faces the second receiving portion. A punching machine according to claim 1. 4. The punch according to claim 3, wherein the second pressing portion includes an elastic member that deforms according to the chevron shape of the second receiving portion when the frame is sandwiched between the second pressing portion and the second receiving portion. machine.

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