JPH0535392U - Dot impact device for embossing - Google Patents

Abstract

(57) [Summary] [Purpose] It is an object of the present invention to provide a dot impact device capable of performing embossing on a work piece in an optimum state suitable for its material, thickness and hardness. [Structure] An air cylinder is made to correspond to each of the impact pins 7 arranged side by side so as to project and retract on the head end surface 10.
The tip end of the rod 5 of the air cylinder and the base end of the impact pin 7 are connected by a connecting member 6. Each air cylinder independently expands and contracts in response to a signal from the control means. In accordance with the expansion / contraction operation of the air cylinder, the tip portion of the impact pin 7 is projected / retracted from the head end surface 10.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a dot impact device for embossing, which enables an embossing process to be performed on an object to be processed in an optimum state suitable for its material, thickness and hardness.

[0002]

[Prior Art]

 As an embossing device for embossing the surface of a workpiece such as cloth using a dot impact device and an ultrasonic wave generator, a device according to Japanese Patent Laid-Open No. 1-320195 has been proposed. More specifically, the device includes a dot impact device having an appropriate number of impact pins and an ultrasonic wave generator provided opposite to the dot impact device, and a head end surface of the dot impact device and an ultrasonic wave generator. The work piece that is interposed between the horn surface and the horn surface is impacted by the required impact pin by the signal from the control means, and the work piece is embossed by the heat generated at the pressing part due to ultrasonic vibration. It was a thing.

By the way, as a dot impact device that can be considered for use in such an embossing device, there is an impact head used in a printer of a word processor or a personal computer. A schematic structure of the impact head is as shown in FIG. 20. A drive plate b is provided corresponding to each impact pin a, and an electromagnet d is provided on the drive plate b so as to face the base end portion c thereof. Also, the impact pin a and the tip e of the drive plate are connected by a wire f. When the electromagnet d is turned off, the drive plate b is pushed by the push spring g so that the tip end portion h of the impact pin is immersed in the head end surface i, while the electromagnet d is turned on, the push spring g is biased. In opposition to the action, the electromagnet d attracts the base end portion c of the drive plate and projects the tip end portion h of the impact pin to the head end surface i.

[0004]

[Problems to be solved by the device]

 By the way, in order to give a clear embossing pattern to the work piece by the embossing device, the pressing force and the pressing time of the impact pin should be adjusted appropriately according to the material, thickness and hardness of the work piece. There is a need to. Moreover, in order to make the embossed pattern clear, the pressing force is maximized and the pressing time is maximized within the range that does not cause mechanical damage to the work piece, and ultrasonic vibrations are efficiently converted into heat. It is necessary to ensure that the processing state is fixed by the partial melting of the work piece.

However, if the above-described commercially available impact head is used in the embossing apparatus, there are the following problems. That is, since the impact head uses the attracting force of the electromagnet to perform the operation of moving the impact pin in and out of the end face of the head, a large current flows through the coil during attraction. For this reason, if the pressing time is lengthened, the coil will be burned, so the pressing time must be set to an extremely short time of about 1/1000 second to 1/2000 second. Also, since the electromagnet is used, the pressing force must be small. Moreover, the pressing time and pressing force are fixed, and their adjustment is not originally planned. For example, even if you try to adjust the pressing time and pressing force of the impact pin by associating a current adjusting device with each electromagnet, the adjustment will be extremely narrow because the coil will burn if an excessive current is applied. Inevitably.

From the above, the commercially available products have no particular problems for the purpose of printing, but are completely unsuitable for embossing. An object of the present invention is to provide a dot impact device for embossing capable of clearly embossing a work piece in a state most suitable for the material, thickness or hardness of the work piece. Is.

[0007]

[Means for Solving the Problems]

 A dot impact device 1 for embossing according to the present invention (hereinafter referred to as a device) comprises an air cylinder 3 corresponding to each of impact pins 7 arranged in a required state so as to project from and retract into a head end surface 10. The tip end of the rod 5 of the air cylinder 3 and the base end of the impact pin 7 are connected by a connecting member 6, and each air cylinder is made to independently expand and contract according to a signal from the control means. It is characterized in that the tip portion 9 of the impact pin 7 is projected and retracted from the head end surface 10 in accordance with the expansion and contraction operation.

It is preferable that the device 1 according to the present invention be made compact if it is configured as follows. That is, the apparatus 1 is formed by forming the air cylinders corresponding to the respective impact pins with the cylinder block. In the cylinder block, a required number of cylinders 19 are provided on the front surface of the cylinder block at intervals, and for each cylinder, the cylinder block communicates with the bottom portion 20 of the cylinder 19 and the other end thereof with the side surface portion 21 of the cylinder block. A first ventilation path 22 that is open and a second ventilation path 25 that is open at one end to the rear surface portion 23 of the cylinder block and at the other end to the side surface portion 21 of the cylinder block are provided. The first control valve 30 is provided between the open ends 26 and 27 of the first and second ventilation passages 22 and 25 in the side surface portion 21, and the second ventilation passage 25 in the rear surface portion 23. Each open end of the is connected to an air source. The open end 41 of each cylinder is communicated with a space chamber 42, and the space chamber 42 is communicated with an air source via a second control valve 61. The first control valve 30 is configured to switch between the conduction state of the first ventilation passage 22 and the second ventilation passage 25 and the exhaust state of the first ventilation passage 22, while the second control valve 61 is used. Is for switching between the electrical connection between the space chamber 42 and the air source and the exhaust state of the space chamber 42.

[0009]

[Action]

 However, when embossing the work piece, the pressing force and the pressing time of the impact pin are set in advance according to the material, thickness and hardness of the work piece. The pressing force is set by adjusting the air pressure supplied to the air cylinder, and the pressing time is set by adjusting the air pressure supplying time.

Then, as shown in FIG. 19, with the work piece 82 interposed between the head end surface 10 of the apparatus 1 and the horn surface 81 of the ultrasonic generator, the control means is operated. When the required air cylinder is expanded / contracted according to the signal, the tip part 9 of the required impact pin correspondingly appears and disappears on the head end face 10, and ultrasonic vibration is efficiently converted into heat at the impact pin pressing portion 83. To be converted. As a result, the work piece is partially melted, the working state is fixed, and a clear embossed pattern appears.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 to 3, an apparatus 1 according to the present invention has an impact pin 7 connected to a tip of a rod 5 of each air cylinder 3 constituting an air cylinder assembly 2 (FIG. 3) via a connecting member 6. In accordance with a signal from the control means, each air cylinder is independently expanded and contracted, and the tip portion 9 of the impact pin 7 is projected and retracted from the head end surface 10 in accordance with the expansion and contraction operation of the air cylinder (FIG. 2). It is a thing.

As shown in FIG. 3, the cylinder assembly 2 is formed by joining a plurality of disk-shaped blocks at their end faces, and includes a first cylinder block 11a and a second cylinder block 11b. An intermediate block 13 interposed between both cylinder blocks, a front block 15 joined to the front end of the first cylinder block 11a, and a rear block 16 joined to the rear end of the second cylinder block 11b. Equipped with.

As shown in FIGS. 3 and 4, the first cylinder block 11 a has a cylinder 19 of a cylinder 19 on which a piston 18 at the base end of the rod 5 is fitted, on the circumference of a front surface portion 17 having a diameter of approximately ½. Twelve are recessed at an equal angle pitch, and for each cylinder, one end communicates with the bottom portion 20 of the cylinder 19 and the other end has a first ventilation passage 22 that opens to the side surface portion 21 of the cylinder block. A second ventilation passage 25, one end of which opens to the rear surface portion 23 of the cylinder block and the other end of which opens to the side surface portion 21 of the cylinder block, is provided such that the open ends 26 and 27 are adjacent to each other. An exhaust groove 29 is provided around the opening ends 26 and 27, and a first control valve 30 (FIGS. 1 and 3) is interposed between the opening ends 26 and 27. It The first control valve 30 switches a conduction state between the first ventilation passage 22 and the second ventilation passage 25 and an exhaust state in which the first ventilation passage 22 is opened to the exhaust groove 29. Further, 12 rod insertion holes 31 are provided between the cylinders on the same circle outside the cylinder juxtaposed portion, and a shaft insertion hole 32 is provided at the center of the cylinder block.

As shown in FIGS. 3 and 5, the second cylinder block 11b is provided on the same circle near the outer edge of the front surface portion 17 thereof with the rod insertion holes 31 and the axis line in the first cylinder block 11a. 12 cylinders 19 into which the pistons 18 at the rod base ends are fitted are recessed, and for each cylinder, one end communicates with the bottom part 20 of the cylinder and the other end of the cylinder block. The first ventilation passage 22 that opens to the side surface portion 21 and the second ventilation passage 25 that has one end opening to the rear surface portion 23 of the cylinder block and the other end opening to the side surface portion 21 of the cylinder block have open ends. 26 and 27 are provided adjacent to each other. An exhaust groove 29 is provided around the opening ends 26 and 27, and a first control valve 30 (FIGS. 1 and 3) is interposed between the opening ends 26 and 27. The first control valve 30 switches between the conduction state of the first ventilation passage 22 and the second ventilation passage 25 and the exhaust state in which the first ventilation passage 22 is opened to the exhaust groove 29. Further, between the adjacent opening ends of the rear surface portion 23 of the second ventilation passage 25, it is possible to communicate with the opening end 33 (FIG. 4) of the rear surface portion of the second ventilation passage 25 in the first cylinder block 11a. An inner air passage 35 is provided so as to extend therethrough, and an outer air passage 36 is provided between cylinders on the same outer circle of the cylinder juxtaposed portion. A shaft insertion hole 32 is provided at the center of the cylinder block 11b.

As shown in FIGS. 3 and 6 to 8, the intermediate block 13 includes a second ventilation passage 25 provided in the first cylinder block 11a and an inner ventilation passage provided in the second cylinder block 11b. The communication passages 37 for communicating with 35 are arranged side by side on the same circle, and the rod insertion holes 31 communicating with the rod insertion holes 31 provided on the first cylinder block are arranged on the outer side thereof on the same circle. ing. Both ends of the communication passages 37 arranged in an annular shape and the rod insertion holes 31 arranged in an annular shape are surrounded by O-rings 40, 40, 40 fitted in the annular grooves 39, 39, 39, respectively. ing. The O-ring serves to maintain airtightness between the intermediate block, the first cylinder block and the second cylinder block (Fig. 8). The outermost O-ring 40a in the rear surface portion 38 is positioned so as to pass through the outside of the outer ventilation passage 36 provided in the second cylinder block 11b, and is located between the outer annular groove 39a and the intermediate annular groove 39b. The height of the existing groove wall is set as low as about 1/2 of the groove depth. As a result of lowering the groove wall in this way, in the state where the intermediate block 13 covers the front surface portion 17 of the second cylinder block, as shown in FIG. A space chamber 42 is formed that allows the open end 41 to communicate with the outer ventilation path 36. A shaft insertion hole 32 is provided in the center of the intermediate block 13.

As shown in FIG. 3, the front block 15 is joined so as to cover the front surface of the first cylinder block 11 a, and includes a small diameter block 43 and a large diameter block 45.

In the small diameter block 43, as shown in FIGS. 3 and 9 to 11, rod insertion holes 31 communicating with the rod insertion holes 31 provided in the first cylinder block 11a are arranged side by side on the same circle. At the same time, rod insertion holes 31 for inserting the rods 5 of the pistons fitted in the cylinders provided in the first cylinder block 11a are arranged side by side on the same circle. Then, the cylinder block 11a is positioned inside the cylinder juxtaposed portion and outside the rod insertion hole 31 of the cylinder block 11a, and is fitted into the annular grooves 39, 39 formed in the rear surface portion of the small diameter block. The enclosed O-rings 40, 40 are designed to keep the block joint airtight (FIG. 11). Further, the height of the groove wall existing between the inner and outer annular grooves 39, 39 is set to be about 1/2 of the groove depth, and the small diameter block 43 covers the front surface portion 17 of the first cylinder block 11a. In this state, a space chamber 42 for communicating the open end 41 of each cylinder 19 with the rod insertion hole 31 of the first cylinder block 11a is formed (FIG. 11). Further, a sealing material fitting concave portion 46 having a size slightly larger than the diameter of the rod inserting hole is provided on the peripheral edge portion of the front end of the rod inserting hole 31 (FIG. 9), and has a V-shaped cross section fitted in the concave portion 46. The annular seal member 47 hermetically seals the rod insertion portion (FIG. 11). A shaft insertion hole 32 is provided at the center of the small diameter block 43.

On the other hand, the large-diameter member 45 is aligned with the rod insertion holes 31 provided in the small-diameter block 43 as shown in FIGS. 3 and 12, and 12 rods are inserted into each of the inner and outer concentric circles. A hole 31 is provided and a screw hole 49 is provided in the central portion of the rear surface portion. Further, a bulging portion 51 having a cylindrical shape and having a screw hole 50 in the central portion is provided in the central portion of the front surface portion.

As shown in FIGS. 3 and 13 to 15, the rear block 16 is joined to the cylinder block 11b so as to cover the rear surface portion of the second cylinder block 11b (FIG. 3) and on the same circle. A circular circumferential groove 55 and a circumferential groove 56 are provided at the portion of the second ventilation passage 25 facing the open end and the portion of the outer ventilation passage 36 facing the opening end, and the circumferential grooves 55, 56 are provided. The O-rings 40, 40, 40 fitted in the annular grooves 39, 39, 39 provided on the inside and the outside of the block ensure airtightness of the block joint portion (FIG. 15). The inner and outer circumferential grooves 55 and 56 are opened to the rear surface portion by inner and outer guide holes 57 and 59, respectively. The inner guide hole 57 communicates with an air source through a conduit (not shown), and the outer guide hole 59 communicates with an air source through a second control valve 61 and a guide tube (not shown). The second control valve 61 connects the outer guide hole 59 to the air source or opens the outer guide hole 59 to the exhaust groove 63. A shaft insertion hole 32 is provided in the center of the rear block 16.

As shown in FIG. 3, each block configured as described above is inserted into the shaft insertion hole 32 and screwed into the screw hole 49 in a state where the piston 18 is fitted in each cylinder 19. The air cylinder assembly 2 (including 24 air cylinders 3) in which the rods 5 of all the pistons are projected to the front end of the front block 15 is configured by being integrated with the connecting screw shaft 65. The air circuit of the air cylinder assembly 2 will be described below with reference to FIG.

The bottom portion of each cylinder 19 of the first cylinder block 11 a includes a first ventilation passage 22, a first control valve 30, a second ventilation passage 25, a communication passage 37, an inner ventilation passage 35, an inner side. The peripheral groove 55 and the inner guide hole 57 are connected to the conduit connected to the air source. Further, the open end 41 of each cylinder 19 is formed in the space chamber 42, the rod insertion holes 31, 31 communicating with the first cylinder block 11 a and the intermediate block 13, and the gap 69 between the rod 5 and the outside ventilation. The passage 36, the outer circumferential groove 56, and the outer guide hole 59 are connected to a conduit communicating with the air source. On the other hand, the bottom portion of each cylinder 19 of the second cylinder block 11b is formed by the first air passage 22, the first control valve 30, the second air passage 25, the inner circumferential groove 55, and the inner guide hole 57. It is connected to a conduit connected to the air source. Further, the open end 41 of each cylinder 19 is connected to a conduit communicating with an air source by the space chamber 42, the outer ventilation passage 36, the outer peripheral groove 56 and the outer guide hole 59.

An impact pin 7 is connected to the tip of the rod 5 of each air cylinder 3 via a connecting member 6, and each air cylinder is independently extended and contracted by a signal from the control means. The tip end portion 9 of the impact pin 7 is projected and retracted on the head end surface 10 in accordance with the expansion and contraction operation, and its specific configuration is as follows.

Twenty-four impact pins 7 are used. As in the case of the commercially available 24-dot impact head, the arrangement state is a zigzag arrangement of two rows of 12 each, and the rows are held by a holding frame 73 provided so as to project in front of the front block 15 (FIG. 1). ~ 3). The holding frame 73 is fixed to the large-diameter block 45 at a distance from the base end guide plate 75, and at a portion near the tip of a support shaft 76 projecting at the peripheral edge of the base end guide plate 75. It consists of a fixed intermediate guide plate 77 and a tip guide plate 79 fixed to the tip of the support shaft 76. The tip guide plate 79 has 12 guide holes 80 for guiding the impact pins 7 per row. They are arranged in a staggered arrangement with two rows on each side (Fig. 2). The intermediate guide plate 77 is also provided with guide holes for guiding the connecting member 6 as an elastic wire in the same arrangement. The base end guide plate 75 is provided with guide holes facing the rod insertion holes of the front block 15. In the holding frame 73 having such a configuration, the impact pin 7 is guided in each guide hole 80 of the tip guide plate 79, and the base end of the impact pin 7 is guided to the guide hole of the base end guide plate 75 and the intermediate guide plate. It is inserted through the guide hole of 77 and is connected to the tip of the connecting member 6 whose base end is connected to the rod tip of the corresponding air cylinder.

The operation of the device according to the present invention having the above-mentioned structure will be described below with reference to FIGS. As shown in FIG. 16, under the condition in which the second control valve 61 opens the outer guide hole 59 to the exhaust groove 63, a required part of the first control valve 30 is activated to operate the first ventilation passage 22. When the second air passage 25 and the second air passage 25 are brought into conduction, the air pressure from the air source A is supplied to the cylinder 19 to move the piston 18 forward, and the rod 5 moves forward accordingly. When the rod 5 advances, the connecting member 6 connected to the tip of the rod 5 is pushed forward, so that the tip portion 9 of the impact pin 7 projects from the head end surface 10.

On the other hand, as shown in FIG. 17, the first control valve 30 for the air cylinder in the expanded state is switched to open the first ventilation passage 22 to the exhaust groove 29, and the second control valve 61. When the outer guide hole 59 is connected to the air source A by switching the air pressure, the air pressure supplied from the air source A to the outer guide hole 59 is supplied to each space chamber 42, and thus the piston of the air cylinder in the expanded state. 18 is retracted so that the tip 9a of the impact pin 7 is immersed in the head end surface 10.

Since the device according to the present invention operates as described above, when embossing the work, the impact pin is pushed in advance according to the material, thickness and hardness of the work. Set the pressure and pressing time. The pressing force is set by adjusting the air pressure to be supplied to each air cylinder with a regulator installed in the conduit, and the pressing time is set to the supply time of the air pressure to be supplied to each air cylinder. It is performed by adjusting the. Then, as shown in FIGS. 18 to 19, a signal from the control means is generated with the workpiece 82 interposed between the head end surface 10 of the apparatus 1 and the horn surface 81 of the ultrasonic generator. When the required air cylinder is expanded and contracted by means of the above, the tip portion 9 of the required impact pin correspondingly appears and disappears on the head end surface 10, and the ultrasonic vibration is efficiently converted into heat at the pressing portion 83 of the impact pin. It As a result, the workpiece is partially melted, the processing state is fixed, and a clear embossed pattern appears.

[0027]

[Effect of the device]

 The present invention has the following excellent effects. Since the impact pins are projected and retracted at the head end surface according to the independent expansion and contraction motion of the air cylinders corresponding to each impact pin, the impact force when the impact pin presses the work piece and The pressing time can be easily adjusted by adjusting the air pressure supplied to the air cylinder or by adjusting the air pressure supply time. From this, it is possible to set the optimum pressing force and pressing time according to the material, thickness and hardness of the work piece, and it is possible to efficiently convert ultrasonic vibrations into heat for clear embossing. A pattern can be formed.

Since the impact pin is operated not by the electromagnet as in the commercially available one but by the air cylinder, the pressing force and the pressing time for each impact pin can be easily adjusted to a uniform state. Particularly, when each air cylinder is connected to one air source through one regulator, it is preferable that the air pressures of all the air cylinders can be adjusted at the same time by adjusting the regulator.

When the air cylinder is composed of a cylinder block, the cylinder and the manifold can be incorporated into one block. Therefore, the simplification and compactness of the device can be achieved as compared with the case where the individual air cylinders are arranged in parallel or the tubes are used for piping.

When assembling the manifold into the cylinder block, the air pressure supplied to each cylinder can be made as uniform as possible compared to the case where tubes are used, and the embossing finish is further improved. it can.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing an arrangement state of impact pins together with an action of projecting and retracting impact pins.

FIG. 3 is a sectional view illustrating an embodiment of the present invention.

FIG. 4 is a partially cutaway perspective view illustrating a first cylinder block.

FIG. 5 is a partially cutaway perspective view showing a second cylinder block.

FIG. 6 is a perspective view showing an intermediate block.

FIG. 7 is a perspective view showing an intermediate block.

FIG. 8 is a cross-sectional view illustrating a state in which an intermediate block is interposed between cylinder blocks.

FIG. 9 is a perspective view showing a small diameter block.

FIG. 10 is a perspective view showing a small diameter block.

FIG. 11 is a cross-sectional view illustrating a joined state of the first cylinder block and the front block.

FIG. 12 is a perspective view showing a large diameter block.

FIG. 13 is a perspective view showing a rear block.

FIG. 14 is a perspective view showing a rear block.

FIG. 15 is a cross-sectional view illustrating a joined state of a second cylinder block and a rear block.

FIG. 16 is an explanatory view explaining the operation of the device according to the present invention.

FIG. 17 is an explanatory view explaining the operation of the device according to the present invention.

FIG. 18 is a perspective view showing a state where a head end surface of the present invention is opposed to a horn surface of an ultrasonic wave generator.

FIG. 19 is an explanatory diagram illustrating a pressing state by an impact pin.

FIG. 20 is an explanatory diagram illustrating a conventional impact head.

[Explanation of symbols]

 1 Device 3 Air Cylinder 5 Rod 6 Connecting Member 7 Impact Pin 9 Impact Pin 9 Tip Part 10 Head End Face 11a First Cylinder Block 11b Second Cylinder Block 18 Piston 19 Cylinder 22 First Ventilation Channel 25 Second Ventilation Channel 30 First Control Valve 42 Space Chamber 61 Second Control Valve

Claims (2)

[Scope of utility model registration request] 1. An air cylinder 3 is attached to each of the impact pins 7 arranged in a predetermined state so as to project from and retract into the head end surface 10.
And the tip end of the rod 5 of the air cylinder 3 and the base end of the impact pin 7 are connected by a connecting member 6, so that the respective air cylinders independently expand and contract according to a signal from the control means. None, a dot impact device for embossing, characterized in that the tip portion 9 of the impact pin 7 is projected and retracted from the head end surface 10 according to the expansion and contraction operation of the air cylinder. 2. The air cylinder corresponding to each of the impact pins is formed by a cylinder block, and the cylinder block is provided with a required number of cylinders 19 at a front portion thereof at a predetermined interval and is recessed. Regarding the cylinder, the first ventilation passage 2 communicating with the bottom portion 20 of the cylinder 19 and having the other end opened to the side surface portion 21 of the cylinder block.
2 and one end of which opens to the rear surface portion 23 of the cylinder block and the other end of which opens to the side surface portion 21 of the cylinder block.
And a ventilation path 25 of the first and second ventilation paths in the side surface portion 21.
A first control valve 30 is interposed between the Nos. 6 and 27, each open end of the second air passage 25 in the rear surface portion 23 is communicated with an air source, and an open end 41 of each cylinder is provided. Is communicated with the space chamber 42, the space chamber 42 is communicated with the air source through the second control valve 61, and the first control valve 30 is connected to the first air passage 22. And the exhaust state of the first ventilation path 22 is switched between the conduction state of the second ventilation path 25 and the second control valve 61.
Is a dot impact device for embossing, characterized in that the space chamber 42 and the air source are electrically connected and the space chamber 42 is exhausted.