JPH11896A - Punched fragment removing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To pass a punched fragment through a through-hole in a punched fragment removing female mold and ensure removal thereof by securing a thrusting and pushing rod at its tip to a portion as the punched fragment. SOLUTION: In a punched fragment removing device to remove a portion (a) as a punched fragment, punched in a flexible sheet material A, from the flexible sheet material A, a thrusting and pushing rod 1 which is attached to a punched fragment removing male mold 20 in opposition to a through-hole 22 in a punched fragment removing female mold 21 has a hollow sheath shaft 2 fixed at its base to the punched fragment removing male mold 20, a thrusting rod 5 having the tip 5' sharpened to be inserted along the axial center of the sheath shaft 2 in an up-and-down movable manner, an operating piece 7 ranging to the rear end of the thrusting rod 5, held by a cavity 4 formed in the sheath shaft 2 in an impossibly removable manner with the axial end protruded from the end face of the base of the sheath shaft 2 and a coil spring 10 acting via the operating piece 7. A thrusting rod operating means 15 is attached the upper part of the punched fragment removing male mold 20 to push the axial end 7a of the operating piece 7 during punching-off for thrusting the tip 5' of the thrusting rod into a portion (a) as the punched fragment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punched piece removing apparatus capable of effectively removing punched pieces generated in a step of punching a flexible sheet material.

[0002]

2. Description of the Related Art Conventionally, in the process of manufacturing a paper container, the work of punching a blank such as a box of a required shape from a flexible sheet material usually involves laterally moving the flexible sheet material and separating it into a required shape first. This is performed by an automatic punching apparatus which continuously performs an operation of punching without a blank, then moving the box blank forming portion together with a portion to be a punched piece to a punching process step, and continuously removing the workpiece with a punched piece dropping mold.

An example of such an automatic punching device will be described with reference to FIG.
In this automatic punching device, a flexible sheet material A, whose both ends in the width direction are clamped by clamps attached to a sheet transport bar 51 traversed by a circulation drive chain 50 intermittently moving at a required pitch, is first punched. It is sent to the process I.

[0004] In the punching step I, a template 53 fixed above the transporting line of the flexible sheet material A and having a punching blade 52 planted in a required shape facing downward is provided.
A punching means constituted by a face plate 56 which is intermittently moved up and down by, for example, a link mechanism 55 operated by a crank mechanism 54 and the like is disposed below the transfer line opposite to the template 53 in the vertical direction. Is done. In the punching step I, when the fed flexible sheet material A is located between the template 53 and the face plate 56, the flexible sheet material A is supported. The face plate 56 is raised by pressing A against the punching blade 52 of the mold plate 53, and a punching process is performed so that a portion to be a punched piece is not completely punched and separated from the blank.

[0005] In order not to completely separate the blank and the portion to be punched, the blank is usually 0.1 to 2 mm.
A tie of about width is left. Further, for example, when a portion serving as a punching piece such as an intermediate independent hole portion is a small punching hole, the entire punching may be performed, but the locking state at the cut surface may be kept as it is to prevent punching and separation.

Next, in the punching step I, the flexible sheet material A 'in a state where the portion a to be punched is not separated by punching processing to leave a joint or the like.
Is then sent to the punched piece processing step II.

In the punching piece processing step II, a punching piece removing lower die 60 fixed below the transporting line of the flexible sheet material A 'and a punching piece removing lower die 60
A punching piece processing means including a punching piece removing upper die 63 intermittently moved up and down by a link mechanism 62 operated by a crank mechanism 61 is disposed above the transport line facing the vertical direction. Is done. In the punched piece processing step II, when the fed flexible sheet material A ′ is located between the punched piece removing upper die 63 and the lower die 60, the flexible sheet material A ′ is supported. Then, the punched-piece removing upper die 63 is lowered so as to be fitted to the punched-piece removing lower mold 60, and a portion a to be a punched piece which is not separated by leaving a joint or the like is sheared at the joint to be removed. Then, the blank B of the required shape is sent out of the machine.

In the automatic punching apparatus, there is the following apparatus for removing a portion to be a punched piece in the punched piece processing step II. For example, Japanese Patent Application Laid-Open
As disclosed by Japanese Patent No. 4197, a punched piece removal lower mold corresponds to a punched portion,
A through-hole is provided such that the part to be removed passes through, and a scrap receiving piece that can move up and down by facing the tip of the through-hole so as to face the pushing rod on the side of the piece removal upper die, A support mechanism for supporting the scrap receiving piece and performing a complicated movement for removing the punching scrap is arranged, and when pushing down a portion punched from the blank by the pushing rod, the pushing rod and the scrap receiving piece end are provided. In such a case, the uncut and uncut portion is broken across the portion to be punched.

Further, as disclosed in Japanese Patent Application Laid-Open No. H8-90493, the lower portion of the punched-piece removal die is formed so that the portion to be removed passes through in a curved state in correspondence with the punched portion. A type in which a through hole is provided, and a pushing rod is provided so as to face the tip side to the through hole, and a type in which the pushing rod is provided with a holding member having a coil spring and cushioning properties is known. ing.

[0010]

However, in the punching piece removing apparatus of the type disclosed in Japanese Patent Application Laid-Open No. H5-4197, the punching piece is removed while supporting the chip receiving piece attached to the lower die for removing the punching piece. Since it has a support mechanism that performs complicated movements, it is easy to be damaged if the working frequency is severe, and if the holding position of the punching piece by the pushing rod on the upper die side and the scrap receiving piece is not set correctly, the dropping operation At times, there is a problem that a punching waste is lifted without being removed, which hinders the next operation.

Further, in the punching piece removing apparatus of the type disclosed in Japanese Patent Application Laid-Open No. 8-90493, the punching piece is pushed into the through hole provided in the punching piece removing lower mold if the punching piece punching position does not match correctly. When pushed into the through hole by the push rod and pushed down, the connecting portion at the peripheral edge of the punched piece cannot be uniformly separated, and the part to be biased and separated as a punched piece becomes inclined and becomes a punched piece. State that the punching rod cannot exert the effect of the pushing rod against the punching part, and the part that becomes the punching piece cannot be pushed through the through hole of the punching piece removal lower die, and the problem that the punching piece cannot be reliably removed is still not solved. It is in.

The present invention has been made to solve such a problem, and the tip of the pushing rod is securely fixed to a portion to be punched, and the punched piece is removed. It is an object of the present invention to provide a punched piece removing device that can be reliably removed by passing through a through hole of a lower die.

[0013]

In order to achieve the above-mentioned object, a punched piece removing apparatus according to the present invention is capable of removing a punched piece that has been punched into a flexible sheet material. In a punching piece removing apparatus for removing from a sheet material, a push rod attached to a punching piece removing upper mold opposite to a through hole provided in a punching piece removing lower mold has a base fixed to the punching piece removing upper mold. A hollow pod shaft, a pierced rod inserted vertically movably along the axis of the pod shaft and having a sharpened tip, and connected to the rear end of the pierced rod, formed inside the pod shaft. An operating piece that is irremovably held by the hollow portion and protrudes the shaft end from the base end surface of the pod shaft by an appropriate length, and a push rod returning means that operates through the operating piece, and during pulling-out operation, Push the shaft end of the operation piece In which tappet operating means for the pierce the treated punched piece is characterized in that provided in conjunction with the upper mold top the punched piece removing the plunger tip Te.

According to the present invention, in the punching piece processing step in the automatic punching apparatus, the punching piece removing upper die is pushed down, and the push rod operating means provided on the upper portion of the punching piece removing upper die is pulled down to operate. By pushing the base end of the piece, the tip of the push rod integrally connected to the operation piece is protruded from the lower end surface of the pod shaft. When the protruding rod is lowered as it is in this state, the pointed end of the protruding rod pierces the part to be punched, and then the end surface of the pod shaft comes into contact with the upper surface of the part to be punched. It is captured without causing displacement, and in this state, a pressing force acts on a portion to be a punched piece by the pod shaft. Therefore, the portion to be the punched piece to which the pressing force is applied is assured that the connecting portion with the blank is reliably cut by being pushed down by the protruding rod, and the punching piece can be dropped out through the through hole provided in the punched piece removing lower die. You get it. Further, since the structure is simple, it is economically effective without failure.

[0015] In the present invention, the push rod return means may include an elastic body between an end of an operating piece connected to the push rod in the hollow portion of the pod shaft and an inner surface of the hollow portion facing the end portion. It is preferable that a pull-back force for retracting the push rod is urged by inserting the push rod. With this configuration, the pointed end of the push rod is pierced into the portion to be punched by the end face of the pod shaft through the operation piece, and the portion to be punched by the protruding rod is punched out through the through hole of the lower die. After the dropping operation, the push rod can be quickly pulled back within the leading end surface of the pod shaft, and the push rod does not come into contact with the moving flexible sheet or the blank when the flexible sheet or blank is moved, so that no obstacle is caused. In addition, as the elastic body disposed in the hollow portion, a coil spring, rubber or sponge having a shape capable of contracting the volume or expanding and contracting in the axial direction can be adopted.

The outer shape of the pod shaft may be polygonal, oval or any other shape depending on the shape of the punched piece to be handled in addition to the circular cross section.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a specific embodiment of a punched piece removing apparatus according to the present invention will be described with reference to the drawings.

FIG. 1 is an enlarged sectional view of a protruding rod of the punched-out piece removing apparatus according to the present invention. The protruding rod 1 is inserted so as to be able to move up and down along a pod shaft 2 having a required length having a hole 3 formed therethrough along the axis, and a hole 3 provided at the axis of the pod shaft 2. A rod 5 having a tip 5 ′ sharpened at an acute angle, and a shaft 4 attached to the rear end of the rod 5 and held irremovably by a cavity 4 formed inside the pod shaft 2. An operating piece 7 protruding from the base end face 2a 'of the pod shaft 2 as appropriate, and a return means (coil spring) 10 for the push rod 5 which returns via the operating piece 7 are constituted.

The pod shaft 2 has a dish-shaped head 2 at one end (upper end in the figure).
c, the other end of which has a coaxial center and a screw hole 2d is provided with a threaded shaft 2b whose tip surface 2b 'is a punched-out portion of a punched piece. 2d
The rear part is screwed and fixed, and the thrust rod 5 is inserted through the hole 3 provided in the axis of the thrust shaft 2b into the hollow part 4 in the base part 2a.

The push rod 5 is attached to the main part 2 a of the pod shaft 2.
The rear end of the inner cavity 4 is inserted and fixed into a hole provided in the axis of the operation piece 7 and is integrally connected. The operation piece 7 has a shaft portion 7a that is inserted from a hollow portion 4 in the base portion 2a of the pod shaft 2 into a hole 3 ′ penetrating the center of the dish-shaped head 2c and protrudes to the outside. It is formed so as not to come out in contact with the end of the cavity 4. Note that the end face of the base 7b of the operation piece 7 and the trunk 2a
A coil spring 10 is interposed between the end face of the push shaft 2b screwed and fixed to the screw hole 2d and fitted on the push rod 5, and always pushes up the operation piece 7 to push the operation piece 7 continuously. The tip 5 ′ of the rod 5 does not protrude from the tip surface 2 b ′ of the pushing shaft 2 b.

As shown in FIG. 2, the push-out rod 1 of the punching piece removing apparatus of the present embodiment is punched into a flexible sheet material A by a punching piece removing upper die 20 as shown in FIG. The tip (the end face 2b 'of the pod shaft 2) faces a through hole 22 for dropout provided in the punching piece removing lower mold 21 corresponding to the portion a to be punched, for example, in a circular shape. The core 2a of the pod shaft 2 is
It is attached by inserting it into the attachment hole 20a and fixing it. The mounting hole 20a of the pod shaft 2 is counterbored so as to receive the dish-shaped head 2c in the base portion 2a of the pod shaft 2, so that the pod shaft 2 does not fall off during use. You.

On the upper side of the punching piece removing upper mold 20, a pushing rod 5 for inserting the pushing rod 5 incorporated in the pushing rod 1 into a punched portion a of the flexible sheet material to be processed. Operation means 15 is provided. The push rod operating means 15 is driven separately from the vertical drive mechanism of the punching piece removing upper die 20, and the push-down member 17 of the push rod 5 which is vertically moved up and down by a required amount by a rod 16 which can move up and down intermittently. It is provided so as to be located directly above the bar 1.

Next, an operation of removing a portion a to be a punched piece from the flexible sheet material A by the punched piece removing apparatus will be described with reference to FIGS. 3 (a) to 3 (d). When the punched piece removing upper mold 20 approaches the punched piece removing lower mold 21 and the rod 16 is pulled down to lower the push rod operating means 15, as shown in FIG. The shaft portion 7a of the operation piece 7 protruding from the upper end (base portion 2a) of the pod shaft 6 of the rod 1 is pushed down by the push-down member 17, and the tip 5 'of the push rod 5 connected to the operation piece 7 is pushed into the push shaft 2b. Projecting from the end face 2b '.

In this state, when the punched piece removing upper die 20 is further lowered, as shown in FIG. 3 (b), the end surface 2b 'of the pushing shaft 2b becomes a punched piece from the flexible sheet material A. a. At this point, since the tip 5 'of the push rod 5 has already protruded from the end face 2b' of the push shaft 2b, the sharply pointed tip 5 'does not pierce the portion a to be a punched piece, and does not cause displacement. A pushing force by the pushing shaft 2b (projecting rod 1) acts.

Next, when the punched-piece removing upper die 20 is further lowered, the punched piece a of the flexible sheet material A is attached to the tip 5 ′ of the push rod 5 as shown in FIG. In the state of being pierced and pierced, the periphery is pushed down by the end face 2b 'of the piercing shaft 2b, cut at a portion connecting the portion a to be a punched piece, and cut through the through hole 22 provided in the punched piece removing lower die 21. Pushed down the street.

When the punched piece removing upper mold 20 is further lowered, the pod shaft 2 (the protruding shaft 2b) is also lowered as shown in FIG. 3D, and the punched piece is formed by the end face 2b '. By completely cutting the connecting portion between the portion a and the blank, the pod shaft 2 (protruding rod 1)
The depressing reaction force acting on the pressure is eliminated. At this time, the push-down member 17 of the push rod operating means 15 starts to move upward, and the push-down member 17 removes the push-down force acting on the shaft portion 7a of the operation piece 7. Then, the pushing rod 5 is pulled back through the operation piece 7 by the compressive force of the coil spring 10 urged by the operation piece 7 in the hollow portion 4 in the main portion 2a of the pod shaft 2. As a result, the punched piece a ′ is discharged downward from the through hole 22 of the punched piece removing lower die 21. When the punched pieces are removed in this way, the punched piece removing upper die 20 rises, receives the next flexible sheet material A to be processed, and performs the punched piece removing operation again in the above-described manner.

In the above description of the embodiment, the operation of removing a punched piece with a single protruding rod has been described. However, when the punched piece is a part having an elongated shape or a large area, the aforementioned protruding rod is required. Are arranged and used at intervals. If necessary, the shape of the tip of the protruding shaft of the protruding rod can be set to an arbitrary shape according to the shape of the punched piece, such as a polygon or an oval. Since the target portion is pierced with the tip of the rod to make the position not to be displaced and then pushed down, the removal operation of the punched piece can be performed reliably.

According to this embodiment, by providing the aforementioned protruding rod and providing the protruding rod operating means and connecting the rod to the double action driving device of the existing equipment, the punched piece removing device can be simplified. The remodeling has an economic effect that can be used effectively.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a protruding rod of a punched piece removing apparatus according to the present invention.

FIG. 2 is a partial longitudinal sectional view showing a main part of a punched piece removing apparatus according to the present invention.

3 (a) to 3 (d) are explanatory views showing an operating state of a protruding rod of the punched piece removing device shown in FIG. 2;

FIG. 4 is a schematic diagram of an automatic punching device. .

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 protruding rod 2 pod shaft 2a main part of pod shaft 2b pod shaft protruding shaft 2b 'end face of butt shaft 4 hollow portion 5 piercing rod 5' tip of piercing rod 7 operating member of pod shaft 7a operating member shaft 10 coil spring 15 Push rod operating means 16 Rod 17 Depressing member 20 Upper die for removing punched pieces 21 Lower die for removing punched pieces 22 Through hole A, A 'Flexible sheet material a Part to be punched piece a' Punched piece

Claims (2)

[Claims] 1. A punching piece removing device for removing a punching piece punched out of a flexible sheet material from the flexible sheet material, wherein the punching piece faces a through hole provided in a punching piece removing lower die. The push rod attached to the upper removal die has a hollow pod shaft whose base is fixed to the punching piece removal upper die, and is inserted so as to be vertically movable along the axis of the pod shaft so that the tip portion has an acute angle. And a hollow formed in the inside of the pod and connected to the rear end of the pier, the rod end is irremovably held, and the shaft end protrudes from the base end surface of the pod shaft by an appropriate length. An operating piece, and a push rod returning means operating through the operating piece, and a push rod operating means for pushing a shaft end of the operating piece and piercing the tip of the push rod into a punched piece to be processed during a drop-out operation. Is above the punched piece removal upper die A punching piece removing device, which is attached to a part. 2. The push rod return means, wherein an elastic body is provided between an end of an operation piece connected to the push rod in a cavity of the pod shaft and an inner surface of the cavity facing the end. 2. The punched piece removing device according to claim 1, wherein the punching piece is configured to be biased by a pull-back force that causes the push rod to retreat. 3.