JPH0811394B2 - Local punching scrap removal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial field: The present invention relates to a punching process of a plate material for a paper container, a folding assembly box,
Or it occurs when forming blanks for launch boxes,
The present invention relates to a local punching scrap removing device capable of efficiently removing punching scraps from a local portion such as an intermediate independent hole portion or a cut groove portion.

2. Description of the Related Art: In the papermaking process, a blanking process such as a box having a desired shape is punched out from an original sheet, and the next processing step is performed without completely punching and separating the blank into a desired shape from the raw material sheet. The process to remove punching scraps is performed in order to efficiently remove the punching scraps generated at the peripheral edge of the blank, the intermediate independent hole portion, or the narrow cut groove portion. As a means, it is known from Japanese Utility Model Publication No. 61-28720.

Problems to be Solved: In the above-mentioned prior art, for example, as shown in FIG. 11, the pushing piece 45A provided on the upper die 40 for removing punching chips is different from the punching piece provided on the lower die 41 for removing punching chips. Even if the elastic receiving piece 48 facing the drop hole 42 cuts off the local punching waste from the sheet A by lowering the pushing piece 45A, the pushing piece 45A is pushed.
Since the punch scraps are sandwiched between the end and the elastic receiving piece 48, the punch scraps are displaced downward, so that the elastic receiving piece 48 follows the upper die 40 and lifts the punching scrap while sandwiching it. This may cause a phenomenon that the lower mold 41 does not quickly drop from the drop hole 42 and interferes with the next work. In particular,
A problem arises when the punched portion has a narrow width and is bent or has a small hole.

In the present invention, by solving such a problem, the local punching scraps are pinched by the pushing piece and the scraps receiving piece facing the punching scraps at the initial stage of the punching operation during the punching scraps removing operation. It is possible to remove all the punching scraps from all at once and to release them securely.After that, the punching scraps are displaced to the side as they descend, and the punching scraps are lifted again and do not interfere with the next operation. SUMMARY OF THE INVENTION It is an object of the present invention to provide a device for removing locally punched waste that can be reliably removed.

Means for Solving the Problems: That is, the present invention relates to an apparatus for removing local punching scraps in a punching process of a paper blank of a paperboard plate material; and a punching scrap receiving mechanism for dropping a punching scrap removing lower die. A scrap receiving piece arranged so that the tip side faces the end of the pushing piece of the upper die for removing punching scraps, and the tip side of the scrap receiving piece moves backward from the bottom side of the pushing piece when retracting backward. It is connected and supported by a support bracket fixed by a link mechanism so that it can be displaced in one direction, and the chip receiving piece is returned by the restoring force of a spring that is incorporated in the support bracket on the rear end side from the pivot point of the link mechanism. It is characterized in that it is configured to be held.

In the link mechanism of the scrap receiving piece in the present invention,
A brake means is provided between the pivot point and the scrap receiving piece connecting point to provide resistance when returning.
In addition, the scrap receiving piece is pin-connected to the tip end side of the lever link that attaches the upper end side to the support bracket, and the lower end side to the auxiliary link, and the return spring is connected to the rear end side of the lever link. It is designed to be supported upright. Furthermore, the scrap receiving piece is loosely supported by the support bracket at the lower end side and supported by the support link at the upper end side, and a return spring is interposed between the support link and the support part of the support bracket. It can also be configured. If a cutting groove is provided at the tip of the scrap receiving piece and a receiving plate having an appropriate width is attached to the cutting groove, a wide range can be supported.

Further, in the present invention, the support bracket of the punching dust receiving mechanism may be fixed to a movable frame body provided below the punching dust removing lower die. Further, it may have a structure in which it is fixed to the lower die for punching waste removal.

Operation: The local punching scrap removing device of the present invention is used by being attached to a predetermined position in a step of punching a blank of a paper container into a desired shape from a raw material sheet and then removing punching chips.

On the upper die of the punching dust removing die, a pushing push piece is provided at a local punching position, a punching dust receiving piece is provided at a position facing the pushing punching piece, and a tip side is provided on the punching dust removing lower die. The upper end is arranged so as to face the lower surface of the sheet to be processed so as to face the extraction hole.

When the punching dust removing operation is performed, when an unnecessary portion for blank formation is cut off from the sheet by the punching dust removing upper die, the pushing piece attached to the upper die pushes down the local punching portion. By the downward movement of the thrusting piece, the scrap portion comes into contact with the scrap receiving piece on the lower side, and the scrap portion is pushed down in a state of being sandwiched by the push piece and the scrap receiving piece. Therefore, the scrap portion is removed and the scrap moves to the hole. The scrap receiving piece is normally held at a predetermined position by the lever link of the link mechanism at the rear end side by the spring force built into the support bracket, and when pushed down, it is supported by the link mechanism more than the initial position. Since it is designed to be pulled to the side, when it is pushed down by the thrusting piece, it is pushed down against the spring force acting on the rear end side of the lever link to hold the scrap receiving piece in place. As a result, the scrap receiving piece is displaced toward the support bracket side, and the receiving and supporting point of the scrap receiving piece gradually shifts from the point where the pushing-down force exerted on the scrap by the end of the pushing and pushing piece ends, so that the punch scrap removing Slightly before the upper mold is lowered to the lowest limit, the local punching scraps are released from the sandwiched state and thrown off.

When the pushing-down force against the scrap receiving piece is removed, the lever link tries to recover rapidly due to the spring force acting on the rear end side of the lever link supporting the scrap receiving piece, but Braking force is received by the braking means that passed when descending, temporarily causing a delay in the return operation,
The scrap receiving piece returns to the standby position without being suddenly pulled back by the spring force. Therefore, since the scrap receiving piece is returned after the return of the push-push piece, the scrap does not return with the scrap being sandwiched, and the scrap can be reliably processed. . As a result, in the locally punched portion, it becomes possible to sequentially perform the punching dust removal operation of the next work sheet without any trouble.

In addition, the support bracket for the scrap receiving piece in the device of the present invention is easily attached and detached when it is mounted on the lower die for punching scrap removal or the like by the mounting screw at the relay seat. Therefore, when exchanging the punching scrap removal mold according to the shape of the blank, the support bracket can be easily attached and detached and can be handled economically. In addition, with respect to the lateral component force generated due to the eccentric movement of the scrap receiving piece,
If necessary, unevenness is provided on the bracket mounting surface to increase the contact resistance so that the bracket can be easily fixed, so that no deviation occurs during use.

In addition, the scrap receiving piece has its lower end loosely supported on the support portion of the support bracket, and has a support link associated with the upper end thereof, and a spring is interposed between the support link and the support portion of the support bracket. , A method in which the scrap receiving piece can be directly pushed up, and after being pushed down in the same manner as in the first method, when returning by spring force, the braking means acts on the support link so that the returning force can be controlled. May be. The same effect can be obtained even if the support bracket is not attached to the punching die and is attached to the machine body side of the punching dust removing device and is linked to the punching die.

Example: The following will describe one example of the present invention with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention, which is a longitudinal sectional view of a punching dust receiving mechanism 10 which is the main body of the device of the present invention. 11 is a support bracket and 20 is a dust receiving piece. , 25 are link mechanisms.

The support bracket 11 is formed with a hollow 12 in the rear half,
A slit 13 is provided on the front side (left side in the figure), and the mounting seat is extended from the latter half of the upper part to a size that provides stability during mounting.
14 are formed. This mounting seat 14 has a long mounting hole 1
4 'is provided. The support bracket 11 is formed of a material having a high mechanical strength such as a synthetic resin, aluminum or an alloy thereof, which is not particularly limited. Reference numeral 15 is a notch portion for attaching the tension spring.

The scrap receiving piece 20 is a thin rod body made of metal or synthetic resin, and the middle portion of the support bracket 11 is pivotally supported at its middle portion.
Each link end of a link mechanism 25 including a lever link 26 supported by 27 and protruding from the slit 13 and an auxiliary link 28 disposed in a lower position parallel to the lever link 26 and appropriately separated from each other. Are connected to pins 29 and 29 ', respectively, and are supported in an upright state. The lever link 26 is preferably formed of a metal plate, and has a rear end portion 26 ′ and an upper end of a tension spring 31 whose lower end is locked to a pin 16 at an inner lower portion of the support bracket 11 and arranged in the hollow portion 12. Are engaged with each other and are kept in a horizontal state. The lever link 26 is provided with a recess 32 on the front side surface that is appropriately separated from the pivot position by the pivot pin 27, and the ball 36 inserted into the brake mounting hole 19 provided on the side portion of the support bracket 11 is provided. By means of a braking means 35 configured to be pushed out into the slit 13 by a pushing spring 37, by temporarily engaging the recess 36 with a ball 36 of the braking means 35, the lever link 26 The braking force acts on the. 38 is a screw plug for incorporating the brake means 35. The connecting portion of the scrap receiving piece 20, the lever link 26, and the auxiliary link 28 is inserted into the notch groove 22 provided in the scrap receiving piece 20 by inserting the tips of the links 26, 28 into pins 29, 29 ', respectively. It is connected. In the figure, reference numeral 21 is a tip of the scrap receiving piece 20, and 17 is a protrusion provided on the upper surface of the mounting seat 14 for preventing slippage.

The punching dust receiving mechanism 10 of the device of the present invention thus configured
As shown in FIG. 4, the support blanket 11 is inserted into the lower die 41 of the die for punching removal, and the upper portion of the scrap receiving piece 20 is inserted into the drop hole 42 for the local punching waste, and the tip 21 thereof is the lower die. 41 Mount it so that it is slightly lower than the top surface.
When installing this, the countersunk bolt 44
Screw it onto the board from the surface and fix it in place.
The mounting hole 14 ′ is fitted outside along the line, and the mounting seat 14 of the support bracket 11 is tightened and fixed by the nut 46.

During the punch scrap removal operation, the lower die 41 for the punch scrap removal mold
When the sheet A to be processed is placed on the upper die 40 and the upper die 40 is lowered, the push-pushing piece 45 attached to the upper die 40 contacts the desired local punching portion a'of the sheet A and pushes it down. The pushing piece
When the local punching waste a comes into contact with the punching scrap receiving piece 20 arranged facing the 45, the punching scrap a is sandwiched by the thrusting piece 45 and the punching scrap receiving piece 20. Then, descend as it is. Therefore, the punching waste a is properly pushed down and removed. As the descent progresses, as shown in FIG. 5, the scrap receiving piece 20 is provided with a lever link 26 connected to the middle portion.
However, by rotating the connecting side downward with the pivot pin 27 as a fulcrum, the support bracket 11 remains upright.
To the support bracket 11 side from the position where the tip 21 of the scrap receiving piece 20 was in contact with the punching scrap a at the beginning. Since such a state occurs within an extremely short time, as a result, the punching dust a falls out of the drop hole 42 in a state of being unbalanced and repelled.

When the scrap receiving piece 20 is in a state of being pushed down to the lowest position, as shown by the chain line in FIG.
The push-push piece 45 of is largely displaced to the one side from the descending axis. In this state, the lever link 26 is pulled back by the force of the tension spring 31 because the tension spring 31 connected to the rear end portion 26 'is stretched. At the time of pulling back by the force of the spring 31, the ball 36 of the braking means 35 engages with the recess 32 provided in the intermediate portion of the lever link 26, the pulling force of the spring 31 is temporarily braked, and the ball is pulled out. The restoring force of the tension spring 31 due to the no load on the waste receiving piece 20 does not act immediately, and due to the braking action, the pushing speed of the pushing piece 45 is not synchronized with the restoration speed and a time lag is restored. As a result, in this way a return operation with a time difference from the pushing piece 45,
By increasing the amount of eccentricity between the pushing piece 45 and the scrap receiving piece 20, the punching scrap a can be returned in a state where it is always separated from the tip 21 of the scrap receiving piece 20.

Therefore, the scraps that have been punched out will not be lifted again and remain.

In the above-mentioned specific example, since the scrap receiving piece 20 is made of a pin, when the locally punched part is long and slender, it is possible to smoothly dispose by disposing a plurality of parts at appropriate intervals.

When one piece of scrap receiving piece 20 requires a wide support portion, as shown in FIG. 6, a cutting groove 33 is provided at the tip of this pin-shaped scrap receiving piece 20A, and this cutting piece is cut. A receiving plate piece 34 having a required size may be attached to the groove 33. Alternatively, instead of the pin, a plate-shaped member having an appropriate width may be adopted. In that case, the central portion may be connected to the connecting link or a plurality of connecting links.

Next, FIG. 7 and FIG. 8 show a second embodiment, in which the scrap receiving support mechanism in this local punch removing device is shown.
10A is a support bracket 51, a scrap receiving piece 55, a support link 56 of the scrap receiving piece 55, and a coil spring for returning.
It consists of 57 and.

As shown in FIG. 7, the support bracket 51 has a receiving portion 51 'projecting from the lower end portion to the front side, and a lower end portion of the rod-like scrap receiving piece 55 is loosely inserted into the receiving portion 51'. The support hole 52 is formed in the vertical direction. Further, an appropriate range is formed in the cavity 53 from the front side surface. The mounting seat 54 for the punching die has the same structure as the support bracket 11 of the first embodiment.

The scrap receiving piece 55 is a metal rod (may be a synthetic resin) having a node 55 'at an intermediate position, the lower end of which is loosely inserted into the support hole 51' of the support bracket 51 described above, and The intermediate portion is inserted into a support insertion hole 56 'provided at the tip of the support link 56 so that the node 55' is engaged with the upper surface of the support link 56, and the lower surface of the support link 56 and the support portion of the support bracket 51.
A coil spring 57 is fitted and interposed between the upper surface of 51 ′ and the scrap receiving piece 55, and the force of the coil spring 57 keeps the scrap receiving piece 55 at a steady position. In addition,
The base end of the support link 56 is pivotally supported by a pin 58 in the cavity 53 of the support bracket 51, and the stopper pin 59 prevents the push-up by the force of the coil spring 57. Reference numeral 35 is a braking means, which has the same structure as that shown in the first embodiment, and is within the range of movement of the support link 56 drawn when the scrap receiving piece 55 is pushed down.
Ball whose side faces 56 project into the cavity 53 of the braking means 35.
By being in contact with 36, a braking force is provided on the support link 56 on the return stroke.

In this type of scrap receiving and supporting mechanism 10A, as in the case of the first embodiment, the support bracket 51 is attached to the punching scrap removing lower die 41, and the local punching scrap a attached to the punching blank a. When the shavings are removed, the pushing and pushing piece 45 attached to the upper die 40 for the punching shavings removes the tip of the shavings receiving piece 55 and the pushing and pushing piece 45 as in the first embodiment. When the cutting scrap receiving piece 55 is pushed down while sandwiching the punching scrap a, the lower end portion of the cutting scrap receiving piece 55 is loosely inserted in the support hole 51 'supporting hole 52 of the support bracket 51, and a node is formed at the intermediate portion. The coil spring 57 is compressed by the support link 56 engaging with 55 ', and as shown in FIG.
The upper part of 55 is displaced toward the support bracket 51 side, and the tip 55 ″ of the scrap receiving piece 55 is displaced from the position where it was originally in contact with the punching scrap a toward the support bracket 51 side. When lowering the piece 45, its tip and scrap receiving piece
55 The punching dust a that is sandwiched by the upper end and descends is automatically blown off, and the punching dust a that has been once punched is lifted again and does not hinder the next work.

When the pushing-down force acting on the scrap receiving piece 55 is removed after the removal operation of the punching scrap a is finished, the scrap receiving piece 55 is pushed up via the support link 56 by the restoring force of the compressed coil spring 57. At this time, the side portion of the support link 56 comes into contact with the ball 36 of the braking means 35 attached to the support bracket 51 and protruding into the cavity 53, and this ball 36
The restoring force of the coil spring 57 is braked by an acting force that pushes the ball 36 inward against the pushing spring force applied to the ball 36, causing a delay with respect to the ascent of the pushing piece 45, and providing a time difference thereof. By being pulled toward the support bracket 51, it is possible to prevent the scraps from being brought back together.

In addition, the punching dust receiving mechanism 10, 1 of the first and second embodiments.
In 0A, bolt 44 is fastened to lower mold 41, so
By removing the nut 46, it is possible to easily remove the whole and replace and mount it with another mold.

The above is the lower part of the die for punching scrap removal.
I explained the type in which 0 and 10A are fixed, but in both such types, the support bracket is
As illustrated in the figure, the support bracket 11A is formed on the machine side of the punching device so as to be attached via an attachment 65 on an operating frame that moves up and down at the lower position of the punching scrap removal wooden mold. Even if it is used by incorporating it in the bracket 11A, the same effect as that described above can be obtained.

The braking means 35 can be omitted if necessary.

Further, as illustrated in FIG. 10, in the local punching dust removing device, a friction piece 45 'such as a flat rubber plate is attached to the end surface of the pushing piece 45 attached to the upper die 40 of the punching dust removing mold. By adhering them so that the contact surface pressure with the surface of the punched waste part a'is increased, it is possible to reduce the paper pressure of papers containing long fiber pulp in the sheet constituent fibers, such as paper container blanks made of high-quality paper. When the punching scrap a'is pushed to tear off the uncut portion in the punching process, the friction piece 45 'opposite to the push-pushing piece 45 has a higher contact frictional force with the surface of the punching scrap a'and slippage occurs. The depressing force acts without occurring. Therefore, even if an uneven pressing force is applied to the uncut portion of the punching scrap a ', the pushing force is reliably transmitted until the uncut portion is cut.
The punching scrap a'can be pulled out without leaving the punching residue. It is also possible to form the tip end of the pushing piece 45 into a plurality of small protrusions so that a pressing force is locally applied when the pushing down piece 45 is pushed down and no slip occurs on the surface of the punched waste.

EFFECTS OF THE INVENTION According to the present invention, when locally removing punching scraps, the punching scraps can be properly sandwiched between the thrusting piece and the punching scrap receiving piece at the initial stage, and the punching uncut portion can be ruptured, and then the punching scraps are punched. By displacing the scrap receiving pieces, the punching scraps can be reliably removed by being blown off, and the work is not hindered. In addition, since it can be easily attached to and detached from the die for removing punching scraps, it can be replaced and used when the die is changed, which is economical.

[Brief description of drawings]

The drawings show an embodiment of the device of the present invention. Fig. 1 is a longitudinal sectional view of the first embodiment, Fig. 2 is a plan view of Fig. 1, and Fig. 3 is an enlarged sectional view of an example of braking means. FIG. 5 is a view showing an operation mode, FIG. 6 is a view showing another mode of the scrap receiving piece,
FIG. 7 is a partial vertical sectional front view of the second embodiment, FIG. 8 is a plan view of FIG. 7, FIG. 9 is a view showing one aspect of an outer shape of a type to be attached to a machine, and FIG. FIG. 11 is a view showing an embodiment in which a friction piece is attached to one end of a pressing die of a mold, and FIG. 11 is a view showing an example of a conventional device. 10,10A …… Punching waste receiving mechanism 11,11A, 51 …… Support bracket 12 …… Hollow part, 13 …… Slit 14,54 …… Mounting seat, 14 ′ …… Mounting hole 15 …… Notch part, 16 …… Pin 19 …… Brake mounting hole 20,20A, 55 …… Scrap receiving piece 21,55 ″ …… The tip of the scrap receiving piece 22 …… Incision groove, 25 …… Link mechanism 26 …… Lever link, 26 ′ …… Rear end of lever link 26 ″ …… Lower end face of rear end of lever link 27 …… Pivot pin, 28 …… Auxiliary link 29,29 ′ …… Connecting pin, 31 …… Tension spring 32… … Concave, 33 …… Cutting groove 34 …… Receiving plate piece, 35 …… Brake means 36 …… Ball, 37 …… Pressing spring 39 …… Screw plug 40 …… Upper die for punching scrap removal 41 …… Punching Lower die for scrap removal 42 ... Punching hole, 45 ... Pushing piece 45 '... Friction piece 51' attached to the end of the pushing piece 52 ... Support bracket support 52 ... Support hole, 53 …… Cavity 55 ′ …… , 56 ... support link 56 '... support insertion holes, 57 ... coil spring 59 ... stopper pin, A ... to be treated sheet a ...... chippings

Claims (7)

[Claims] 1. A local punching scrap removing device for removing local punching scraps in a punching step of a paper blank for a paper blanking plate; a punching scrap support mechanism has a lower end of a punching scrap removing die having a tip end side. A scrap receiving piece arranged so as to face the end of the pushing piece of the upper die for removing punching scraps, and the tip end side of the scrap receiving piece is displaced laterally from below the pushing piece when retracting backward. As described above, the scrap receiving member is connected and supported by the supporting bracket fixed by the link mechanism, and the rear end side of the pivotal fulcrum of the link mechanism is restored and held by the restoring force of the spring incorporated in the supporting bracket. A local punching scrap removing device characterized by being configured. 2. A link mechanism for the scrap receiving piece,
2. The local punching scrap removing device according to claim 1, further comprising braking means provided between the pivot point and the cutting scrap receiving piece connecting point for providing resistance when returning. 3. The scrap receiving piece is pin-connected to the leading end side of the lever link, the upper end side of which is pierced by the support bracket, and the lower end side of the auxiliary link, to the rear end side of the lever link. The local punching scrap removing device according to claim 1 or 2, wherein the local punching scrap removing device is configured so that the parts are connected to each other and supported in an upright state. 4. A local punching scrap removing device for removing local punching scraps in a punching step of a paper blank for a paper blanking plate, wherein the punching scrap support mechanism has a tip end in a dropout hole of a lower die for punching scraps removal. A scrap receiving piece arranged so as to face the end of the pushing piece of the upper die for removing punching scraps, and the tip end side of the scrap receiving piece is displaced laterally from below the pushing piece when retracting backward. As described above, the upside-down rotatable support link and a fixed support bracket that is connected and supported in cooperation with each other are provided, and the scrap receiving piece is supported at its lower end side by a support portion of the supporting bracket and at its upper end side. A local punching scrap removal device, which is supported by a link, and a return spring is interposed between the support link and a support portion of the support bracket. 5. The device for removing local punching dust according to claim 4, wherein the support bracket for the scrap receiving piece is provided with a brake means for giving a resistance when the support link of the scrap receiving piece returns to the rotation. 6. The local scrap removal according to claim 1, wherein the scrap receiving piece is provided with a cut groove at a tip end thereof, and a receiving plate having an appropriate width is fitted and attached to the cut groove. apparatus. 7. The local punching scrap according to claim 1, wherein a support bracket of the punching scrap receiving mechanism is fixed to a movable frame body provided under the punching scrap removing lower die. Removal device.