JPH0571388B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to the structure of a foil stamping machine for applying metal foil to a sheet material made of paper, plastic, leather, etc. Regarding improvements.

[Prior art]

Generally, foil stamping machines can be used on paper, plastic sheets,
A metal foil is layered on a sheet material made by cutting leather or the like, and a mold is pressed from both sides, and a desired shape, pattern, character, etc. is formed on the mold by pasting the foil. Additionally, this mold is usually equipped with a heater, and the heat from the heater helps to firmly adhere the foil.

FIG. 7 shows a structure for feeding the sheet material and foil to the mold in such a conventional foil stamping machine.

That is, in the foil stamping machine shown in the figure, the die that performs the foil stamping operation is a swing plate 12 that rises from below an upper surface plate 10 fixed to the foil stamping machine body and contacts the lower surface of the upper surface plate 10. The lower surface of the upper surface plate 10 is equipped with a mold for shaping the foil to be pasted into a desired shape, shape, pattern, character, etc. A heater is also provided inside to heat the mold. The upper surface plate 10 and the shaking plate 1
The foil 14 sent between 2 has a long strip shape, and one edge is wound up by a take-up roller 16.
The other edge is wound around the delivery roller 18. The take-up roller 16 functions to sequentially wind up the foil as the foil stamping operation progresses. Delivery roller 1
8 has the function of supplying the foil 14 while applying tension. Further, two rows of loop chains 20 are used to feed the sheet material (transported in the direction of the horizontal arrow in the figure) to the underside of the foil 14. The forward side 20a of the loop chain 20 passes between the upper surface plate 10 and the swing plate 2 in a state parallel to each surface of both plates. The double-acting side 20b is the upper surface plate 10
It passes around the top of the . Then, in synchronization with the vertical movement of the shaking plate 12, the loop chain 2
0 moves intermittently to feed the sheet material. A clamper bar 22 is provided between the two rows of loop chains 20 to clamp and feed the sheet material. This clamper bar 22 is provided across both loop chains 20 at a plurality of locations in the circumferential direction of the loop chain 20. A clamper 24 is provided behind the clamper bar 22 in the feeding direction (on the right side in the figure), and is configured to clamp the cut sheet material.

With the above structure, the sheet material can be attached to the clamper 24.
When the loop chain 20 is clamped and moved to the left in FIG. 7 via the clamper bar 22, it is sent to the left and into between the upper surface plate 10 and the swing plate 12.

Note that there are patent publications relating to conventional foil stamping machines, such as JP-A-60-132761 and JP-A-63-205236.

[Problem to be solved by the invention]

According to the prior art, the front end of the sheet material is clamped and fed, and the rear end is free. For this reason, there is no problem if the sheet material is thick paper, but if it is thin paper, for example, wrinkles tend to occur in the paper, and if you press foil with wrinkles, the foil will not be pasted in the correct position. This tends to result in defective products such as misalignment, air bubbles inside the foil, and wrinkles in the foil. Wrinkling of the sheet material is more likely to occur as the feeding speed of the sheet material is faster, so conventionally, when wrinkles are likely to occur, it has been dealt with by slowing down the feeding speed. However, when the feed speed is slowed down, productivity is reduced.

The present invention was made to solve the above problems, and an object of the present invention is to provide a foil stamping machine that does not easily cause wrinkles even when the feeding speed of the sheet material is increased.

[Means to solve the problem]

The present invention has been made to achieve the above object, and is used in a foil stamping machine that applies foil to a sheet material by hot foil stamping. A shaking plate that is raised up and in contact with the shaking plate, two rows of loop chains for feeding the sheet material in a substantially horizontal state between the upper surface plate and the shaking plate, and two rows of loop chains at multiple locations in the circumferential direction of the loop chain. It has a clamper bar that is passed between the two and clamps the tip of the sheet material, and a suction hole that is provided near the inlet for feeding the sheet material to the upper surface plate and that sucks the sheet material over approximately the entire width of the sheet material. and a suction means, and by moving the suction means in synchronization with the movement of the agitation plate, when the agitation plate is lowered and the clamper bar passes, it is retreated from the passing position, and the agitation plate is raised and the clamper bar passes. The foil stamping machine is characterized by being equipped with a synchronizing means that moves forward to approach the sheet material and perform suction when the sheet material is sent.

[Effect]

The rear end side of the sheet material, which is conveyed with the front end clamped by the clamper bar, is suctioned over approximately the entire width by the suction means, so that the sheet material is in a tensioned state and wrinkles are less likely to occur. The sheet material must be pulled parallel to the lower surface of the upper surface plate, and therefore the suction means must be as close to the sheet material passage position as possible. However, in order to avoid interference between the suction means and the clamper bar, the suction means cannot always be provided at a position where the sheet material passes. Therefore, the synchronization means causes the suction means to be synchronized with the movement of the agitation plate, so that when the agitation plate is lowered, the suction means is moved backward from the passing position, and when the agitation plate is raised, it is advanced to the passing position. As a result, the suction means is retracted from the passing position when the clamper bar passes, and moves forward to the passing position and approaches the sheet material when the clamper bar has finished passing.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

Fig. 1 is a side view showing the device of this embodiment, Fig. 2 is a plan view of Fig. 1, Fig. 3 is an enlarged view of the main part of Fig. 1, and Fig. 4 explains the operation of this embodiment. The overall schematic diagram, FIG. 5, is a diagram for explaining the operation shown in FIG. 4 in more detail.

As shown in FIG. 1, a mold 26 is provided on the lower surface of the upper surface plate 10 fixed to the main body of the foil stamping machine. This mold 26 is used to shape the foil (not shown) to be pasted into a desired shape, and is heated by a heater provided inside the upper surface plate 10. A swing plate 12 approaches the upper surface plate 10 from below and performs a foil stamping operation. A strip of foil and a sheet material 28 are fed between the upper surface plate 10 and the shaking plate 12. The figure shows the situation near the inlet.

Two rows of loop chains (not shown) are present between the upper surface plate 10 and the swing plate 12 for feeding the sheet material 28. The interval (width) between the two rows of loop chains is wider than the width of the upper surface plate 10 and the swing plate 12, so that they do not interfere with each other. Clamper bars 22 are passed between the two rows of loop chains at multiple locations in the circumferential direction of the loop chains. A clamper 24 is provided on the rear side of the clamper bar 22 (on the opposite side to the sheet material feeding direction). This clamper 24 is 2
It consists of two leaf springs 30 and 32, and is adapted to clamp the front end of the sheet material 28 with a convex portion 34 at the rear end. A protrusion 3 is provided on the lower surface of the upper leaf spring 30.
6 is formed, and this protrusion 36 is connected to the lower leaf spring 3.
It passes through the hole drilled in 2 and is exposed. This protrusion 36 is pushed up by a cam when the sheet material 28 is clamped, so that the clamper 24 opens. As the loop chain (not shown) moves, the clamper also moves and passes between the upper surface plate 10 and the oscillating plate 12, and this passing position is at a position where the lower surface of the upper surface plate 10 is almost there.

A vacuum pipe 38 is used as a suction means for sucking and pulling the rear end of the sheet material 28 being fed.
is provided. As shown in FIG. 2, this vacuum pipe 38 is
It is a single pipe arranged in a direction perpendicular to the direction, that is, in the width direction, and has a plurality of suction holes (not shown) opened in the width direction. Suction holes that are unnecessary due to the widthwise size of the sheet material used can be plugged with rubber plugs or the like. Both ends of the vacuum pipe 38 are connected to a pair of rotating arms 42. That is, as shown in FIG. 3, both ends of the vacuum pipe 38 are connected to an air passage 44 opened inside the rotating arm 42, and the rear end of the air passage 44 is a suction head 46. A flexible tube of an air pump (not shown) is connected to 46 to introduce negative pressure. Rotating arm 4
The rear end of 2 serves as a rotation fulcrum 48 and is rotatable. Another roller arm 50 is fixed to the rotating arm 42, and a cam roller 52 is provided at the tip of the roller arm 50. The cam roller 52 engages with a cam groove 54 formed horizontally on the oscillation plate 12. Said rotation fulcrum 4
8 is attached to the vacuum base 56,
A spring 58 is provided between the vacuum base 56 and the rotating arm 42.
2 in one movable direction.

The vacuum base 56 is movable in accordance with the dimension of the sheet material 28 in the longitudinal direction (feeding direction) 40. That is, a pair of screw shafts 60 (see FIGS. 1 and 2) are arranged on both sides of the upper surface plate 10. This screw shaft 60 has a spiral screw 62 (a square screw with square teeth) formed on the outer periphery. A female thread that engages with this screw 62 is formed inside the vacuum base 56. The vacuum base 56 is provided on the outer periphery of the screw shaft, and is movable in the axial direction of the screw shaft 60 as the screw shaft 60 rotates.

Spiral gears 64 are formed at the ends of the pair of screw shafts 60, and worm gears 68 provided at both ends of one worm shaft 66 are screwed into these two spiral gears 64. A first sprocket 70 is concentrically attached to the worm shaft 66.
is provided. This first sprocket 70
is connected to a second sprocket 74 via a first chain 72 and to a third sprocket 78 via a second chain 76. is provided and can be rotated manually.

Next, the operation of this embodiment will be explained with reference to FIGS. 4 and 5. FIG. 4 is an overall schematic diagram for explaining the action of the vacuum pipe 38, which is the suction means. First, the figure A shows a state in which the swing plate 12 has descended to its lowest point. At this time, the cam roller 52 has moved within the cam groove 54 to the right end, and with this movement, the rotating arm 42 has rotated to the lowest point. In this state, the vacuum pipe 38 is positioned at the passing position of the clamper bar 22. The clamp bar 22 is sufficiently set back from the clamp bar 22 and does not interfere with the clamp bar 22. The clamper bar 22 moves while clamping the front end of the sheet material 28, and feeds the sheet material 28 into the interior from the feed port 82 in a substantially horizontal state.

When the sheet material 28 is sufficiently fed, the oscillation plate 12 starts to rise, and the cam roller 50 in the cam groove 54 moves to the left in the figure, thereby causing the rotating arm 42 to start rotating upward. (Figure B). Negative pressure is always applied to the vacuum pipe 38 from a vacuum pump (not shown), and surrounding air is sucked in. Then, by the upward rotation of the rotating arm 42, the vacuum pipe 38 moves forward toward the position where the sheet material 28 passes, and when it approaches the sheet material 28, it sucks in the sheet material 28. At this time, the sheet material 28 is pulled between the clamper bar 22 and the clamper bar 22.

In this way, the sheet material 28 is sufficiently fed in a stretched state, and at the same time, the shaking plate 12 continues to rise further, and the sheet material 28 and the foil (see FIG. (not shown) and press. At this time, the vacuum pipe 38 is attached to the sheet material 28.
The position of the rotating arm 42 in the feeding direction is adjusted so that the final end of the rotating arm 42 is in a suctioned state (C in the figure). This adjustment is performed by manually rotating the handle 80 (see FIGS. 1 and 2), and applying this rotational force to the third sprocket 78, second chain 76, second sprocket 74, first chain 72, and 1st
sprocket 70 in order, and the worm shaft 66
and rotate the screw shaft 60 via the worm gear 68 and the spiral gear 64,
This is done by moving the vacuum base 56 in the axial direction of the screw shaft 60.

After the oscillation plate 12 completes its ascent and ends the foil stamping operation, the oscillation plate 12 starts to descend again, the cam roller 52 moves to the right in the figure, and the rotating arm 42 rotates downward (see D in the figure). ), Bakyuum pipe 38
moves back from the clamper bar 22 passing position and waits for the next clamper bar 22 to pass. Immediately after the rotating arm 42 starts rotating downward, the vacuum pipe 38 continues to suck the rearmost end of the sheet material 28, and the sheet material 28 is further fed to the discharge port of the upper surface plate 10 (Fig. The sheet material 28 can also be prevented from wrinkling when being discharged from the container (not shown).

As described above, the vacuum pipe 38, which is a suction means, suctions the rear end side of the sheet material 28.
By pulling the sheet material 28 between the upper surface plate 10 and the swing plate 12, wrinkles can be prevented. Further, by the functions of the cam roller 52 and the rotating arm 42, which are synchronizing means, the vacuum pipe 38 is prevented from interfering with the clamper bar 22, and the sheet material 28 can be pulled at the position where the clamper bar 22 passes. Since the clamper bar 22 passes parallel to the lower surface of the upper surface plate 10, the sheet material 28 is pulled almost parallel to the lower surface of the upper surface plate 10, and the sheet material 28 is in an optimal state. Then, it is sent to the lower surface of the upper surface plate 10. Incidentally, FIG. 5A shows an enlarged view of a state in which the rotating arm 42 is rotated downward and the vacuum pipe 38 is retreated from the position where the clamper bar 22 passes. FIG. 2B shows an enlarged view of the state in which the rotating arm 42 moves upward toward the position where the clamper bar 22 passes, sucking in and pulling the sheet material 28. The synchronous operation of advancing and retracting the vacuum pipe 38 at the optimum timing with respect to the passage of the clamper bar 22 is performed by utilizing the lowering and raising movements of the shaking plate 12 by the function of the cam roller 52 and the cam groove 54. Therefore, the synchronizing means can be made inexpensive, and the synchronizing operation can be performed correctly even when hot foil stamping is performed at high speed.

(Other Embodiments) In the above embodiments, the position of the vacuum pipe 38, which is a suction means, in the feeding direction is adjusted by moving the vacuum base 56 in the axial direction of the screw shaft 60 as the screw shaft 60 rotates. However, in other embodiments, as shown in FIG.
It is also possible to perform position adjustment using 4. That is, a rack gear 82 is formed facing the feeding direction on the back arm base 56 where the rotation fulcrum 48 of the rotation arm 42 is provided, and a pinion gear 84 that meshes with the rack gear 82 is provided. The shaft 86 may be configured to transmit the rotation of the handle 80 (see FIGS. 1 and 2), etc., as in the previous embodiment.

In addition, in the above embodiment, the vacuum pipe 3
8 moves forward and backward with respect to the passing position of the clamper bar 22 by rotating the rotating arm 42 on which the vacuum pipe 38 is provided around the rotating fulcrum 48, but other implementations are possible. In this example, the vacuum pipe is provided at the tip of an elevating arm that moves up and down within a slide guide provided in the vertical direction, instead of the rotating arm 42, so that the elevating arm can be directly moved up and down as the shaking plate moves up and down. You can also do this.

Further, in the embodiment described above, the suction means was a vacuum pipe 38 provided with a plurality of suction holes, but in other embodiments, a plurality of It may also have suction holes formed therein. By providing suction holes on the surface, the force for pulling the sheet material can be increased.

In the above embodiments, the synchronizing means mechanically transmits the vertical movement of the shaking plate using cam grooves, cam rollers, etc., but in other embodiments, the synchronizing means mechanically transmits the vertical movement of the shaking plate or The approach of the clamper bar may be electrically detected, and this detection signal drives a motor to raise and lower the suction means, thereby moving the suction means forward and backward relative to the position where the clamper bar passes.

In addition, in the embodiment described above, the vacuum pipe (suction means) was moved back by moving the vacuum pipe downward from the position where the clamper bar passed, but in other embodiments, it was reversed. It is also possible to move backward upwards.

In addition, the above-mentioned suction means and synchronization means are
At the same time, it is also possible to provide it near the discharge port through which the sheet material is discharged. By providing it at the discharge port, it is possible to prevent wrinkles from occurring in the discharged sheet material. At this time, since the sheet material does not need to be pulled horizontally (parallel to the lower surface of the upper surface plate 10), It is also possible to omit it.

〔Effect of the invention〕

As explained above, according to the foil stamping machine of the present invention,
By suctioning the rear end side of the sheet material clamped by the clamper bar moved by the loop chain, the sheet material can be pulled and wrinkle-free. In addition, due to the synchronization means, the suction means can suction the sheet material at the position where the clamper bar passes without interfering with the clamper bar, and pulls the sheet material parallel to the bottom surface of the upper surface plate to keep it in the optimal state. material can be sent. Therefore, even when foil stamping is performed at high speed, the sheet material does not wrinkle, and unlike conventional methods, the foil stamping position does not shift or the pasted foil is wrinkled, resulting in defective products. You can perform foil stamping operations and increase productivity.

[Brief explanation of drawings]

FIG. 1 is a side view of an apparatus showing an embodiment of the present invention. FIG. 2 is a plan view of FIG. 1; FIG. 3 is an enlarged view of the main part of FIG. 1. FIG. 4 explains the operation of this embodiment, and shows A, B,
It is a figure which shows the state where foil stamping operation|movement is performed in order of C and D. 5A and 5B are enlarged views showing the main parts of FIG. 4. FIG. 6 is a perspective view showing the main parts of another embodiment. FIG. 7 is a side view showing a conventional device. 10... Upper surface plate, 12... Shaking plate, 14... Foil, 16
... Take-up roller, 18... Delivery roller, 20... Loop chain, 22... Clamper bar, 24... Clamper, 26... Mold, 28... Sheet material, 38... Vacuum pipe, 42... Rotating arm, 48... Rotating Fulcrum, 50...Roller arm, 52...Cam roller,
54...Cam groove, 56...Bakyuum base, 58...
Spring, 60... Screw shaft, 64... Spiral gear, 66... Worm shaft, 68... Worm gear, 70... First sprocket, 72... First chain, 74... Second sprocket, 76... Second
Chain, 78...Third sprocket, 80...
Handle, 82...Rack gear, 84...Pinion gear, 86...Pinion shaft.

Claims (1)

[Claims] 1. In a foil stamping machine that applies foil to a sheet material by hot foil stamping, an upper surface plate provided on the foil stamping machine body, an agitating plate that rises up from below the upper surface plate and touches it, and the upper surface plate and the agitating plate. A two-row loop chain for feeding the sheet material in a substantially horizontal state between the
A clamper bar that is passed between two rows of loop chains at multiple locations in the circumferential direction of the loop chain and clamps the tip of the sheet material, and a clamper bar that is provided near the inlet that feeds the sheet material to the upper surface plate and is provided in the vicinity of the inlet that feeds the sheet material to the upper surface plate. A suction means having a suction hole for sucking the sheet material across its entire width, and this suction means being moved in synchronization with the movement of the agitating plate, when the agitating plate descends and the clamper bar passes, it is moved from the passing position. A foil stamping machine characterized in that it is provided with synchronizing means that causes the oscillating plate to move backward, and when the clamper bar has finished passing and the sheet material is sent, moves forward to approach the sheet material and perform suction. .