JP2002316358A - Clamping device and method for clamping resin-molded sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that an operator needs much power, when he inserts a finger into a gap between the upper face of a clamping frame and the lower face of a peripheral edge part of moldings and therefore, the operating efficiency is low. SOLUTION: When a specified number of projecting pins 20 are arranged on a clamping frame 13a of a clamping mechanism 13 and a cylinder device 30 corresponding to the projecting pin 20 is arranged on the side 12b of a molding die and further, the peripheral edge part of a resin-molded sheet S is separated from the upper face of the clamping frame 13a, the pin upper end part 21 of the projecting pin 20 is projected from the upper face of the clamping frame 13a by driving a cylinder shaft 32 of the cylinder device 30. Consequently, it is possible to separate the peripheral edge part of the resin-molded sheets from the upper face of the clamping frame 13a. Thus the operator need not resort to a manual work when the operator removes the resin-molded sheet S from the clamping mechanism 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamp device and a method for clamping a resin molded sheet, and more particularly to a clamp device for clamping and holding a peripheral portion of a resin molded sheet and a method for clamping a resin molded sheet.

[0002]

2. Description of the Related Art Conventionally, in a single-shot molding machine, a cut sheet as a resin molded sheet is placed on a clamp device when performing thermoforming. This clamp device includes a clamp frame having a flat frame structure, and a clamp mechanism for clamping and holding a peripheral portion of a cut sheet placed on the clamp frame. In such a configuration, the operator first places the cut sheet on the clamp frame, and clamps the periphery of the cut sheet with the clamp mechanism with the clamp mechanism. Then, a predetermined upper and lower mold is driven up and down with respect to the cut sheet clamped by the clamp device so as to substantially contact with each other to perform thermoforming. When the thermoforming is completed, the upper and lower dies are moved up and down in a direction away from each other to form a molded product. At this time, since the peripheral portion of the molded product is held by the clamp device, the worker removes the molded product from the clamp device when removing the molded product from the clamp device.
The clamp of the peripheral portion by the clamp mechanism is released, and the resin molded sheet S is separated from the clamp frame by lifting the peripheral portion while inserting a finger between the upper surface of the clamp frame and the sheet lower surface of the peripheral portion of the molded product. .

[0003]

In the above-mentioned conventional clamping device, when the weight of the molded product is heavy, the operator inserts a finger between the upper surface of the clamp frame and the lower surface of the sheet at the peripheral portion of the molded product. Power was required and workability was poor. In addition, when the temperature of the upper surface of the clamp frame is high, it is necessary to wait for the operation to be performed until the temperature is lowered, which causes a problem that the operation efficiency is reduced. In addition, there is a method of removing the molded product from the clamp device by suctioning the peripheral part with the suction pad.However, this method may cause marks of the suction pad on the design surface of the product,
There is also a possibility that the product may be dropped due to poor suction.

The present invention has been made in view of the above problems, and has as its object to provide a clamp device capable of separating a resin molded sheet from a clamp device and a method of clamping a resin molded sheet.

[0005]

In order to achieve the above object, the invention according to claim 1 comprises a clamp means for clamping and holding a peripheral portion of a resin molded sheet, and a resin molding held by the clamp means. And a resin molded sheet separating means for separating a substantially peripheral portion of the sheet from the clamping means. In the invention according to claim 1 configured as described above, the peripheral portion of the resin molded sheet is clamped and held by the clamp means, and the resin molded sheet held by the clamp means by the resin molded sheet separating means is held. The peripheral portion is separated from the clamping means. That is, since the resin molded sheet separating means can separate the substantially peripheral portion of the resin molded sheet from the clamp means, it is necessary to intervene a manual operation of an operator when removing the resin molded sheet from the clamp means. Disappears.

Here, the resin molded sheet separating means is not particularly limited as long as it can relatively separate the substantially peripheral portion of the resin molded sheet from the clamp means. Therefore, the resin molded sheet may be separated from the clamp means by moving the substantially peripheral portion of the resin molded sheet, or the resin molded sheet may be separated from the clamp means by moving the clamp means. It is possible. Further, the resin molded sheet separating means may be configured to separate a substantially peripheral portion of the resin molded sheet from the clamp means. That is, when performing the operation of removing the resin molded sheet from the clamping means, it is not always necessary to integrally separate the peripheral edge portion of the resin molded sheet, but it is sufficient to substantially separate the peripheral edge portion. It goes without saying that the peripheral portion may be separated from the peripheral portion as a substantially peripheral portion.

[0007] The invention according to claim 2 is an example of a method of separating the peripheral portion of the resin molded sheet held by the clamp means by the resin molded sheet separating means from the clamp means. In the clamp device, the clamp means includes a flat plate frame structure on which a peripheral portion of the resin molded sheet can be placed,
The resin molded sheet separating means is configured to include a push-up mechanism capable of pushing up a substantially peripheral portion of the resin molded sheet placed on the frame structure of the flat plate from the flat plate. In the invention according to claim 2 configured as described above, the clamping means is provided with a flat frame structure on which the peripheral portion of the resin molded sheet can be placed. The resin-molded-sheet separating means is provided with a push-up mechanism, and the push-up mechanism pushes up a substantially peripheral portion of the resin-molded sheet placed on the frame structure of the flat plate. By pushing up the substantially peripheral portion of the resin molded sheet in this way, it is possible to separate the substantially peripheral portion from the clamping means.

According to a third aspect of the present invention, as an example of a specific configuration capable of pushing up a substantially peripheral portion of a resin molded sheet by a pushing up mechanism, in the clamp device according to the second aspect, A protruding pin is disposed on the lower surface of the substantially peripheral portion of the resin molded sheet and is disposed on the upper surface of the flat plate of the frame structure so as to be able to protrude and retract upward, and a protruding pin raising mechanism for raising the protruding pin upward There is a configuration.

In the invention according to claim 3 configured as described above, the push-up mechanism is constituted by the protruding pin and the protruding pin raising mechanism. At this time, the protruding pins are arranged on the lower surface of the substantially peripheral portion of the resin molded sheet. The protruding pins are arranged so as to be able to protrude and retract from above on the upper surface of the flat plate of the frame structure of the clamp means. The protruding pins thus arranged are raised upward by the protruding pin raising mechanism. That is, the protruding pin which can protrude upward on the upper surface of the flat plate of the frame structure is moved upward by the protruding pin of the protruding pin raising mechanism,
It protrudes upward from the upper surface of the flat plate. Therefore, the substantially peripheral portion of the resin molded sheet disposed above the protruding pins is separated from the clamping means by the protruding of the protruding pins.

[0010] As a specific example of the protruding pin raising mechanism for raising the protruding pin above the upper surface of the flat plate of the frame structure, the invention according to claim 4 is the clamp device according to claim 3, wherein The mechanism is configured to be formed by an air cylinder. In the invention according to claim 4 configured as described above, the projecting pin raising mechanism is formed by an air cylinder. This makes it possible to make the projecting pin raising mechanism simple.

As described above, the protruding pins can be protruded and retracted on the upper surface of the flat plate having the frame structure. At this time, although it protrudes above the upper surface of the flat plate depending on the raising operation by the protruding pin raising mechanism, it does not have a mechanism that sinks into the upper surface of the flat plate.
In such a case, the protruding pin may be made to sink by its own weight, or may be made to sink into the flat plate upper surface by applying some force. Therefore, claim 5
According to a third aspect of the present invention, in the clamp device according to any one of the third and fourth aspects, the protruding pin includes a protruding pin urging means capable of urging the upper end of the pin flush with the upper surface of the flat plate. It is provided as a configuration. In the invention according to claim 5 configured as above, the upper end of the protruding pin is urged flush with the upper surface of the flat plate by the protruding pin urging means. Thus, in the normal state, the protruding pin can be set in a state of sinking with respect to the upper surface of the flat plate. The upper end of the pin can be returned to the upper surface of the flat plate by the urging means.

As another example of a method for separating the peripheral portion of the resin molded sheet held by the clamp means by the resin molded sheet separating means from the clamp means, the invention according to claim 6 is the invention according to claim 2 In the above-described clamp device, the push-up mechanism moves a first arm disposed on a lower surface of a substantially peripheral portion of the resin molded sheet, and vertically moves the other end disposed substantially at an end of the first arm. It is configured to include a pivot to be enabled and a second arm extending below the frame structure from a pivot end of the first arm.

[0013] In the invention according to claim 6 configured as described above, the lifting mechanism includes the first arm, the pivot, and the second arm. Here, the first arm is disposed on a lower surface of a substantially peripheral portion of the resin molded sheet, and the pivot is disposed at a substantially end of the first arm so that the other end can be vertically moved. The second arm extends from the pivot-side end of the first arm below the frame structure. Therefore, when the second arm is rotated about the pivot in the direction in which the first arm protrudes from the upper surface of the plate, the first arm rotates about the pivot and protrudes from the upper surface of the plate. I do. Thereby, the substantially peripheral portion of the resin molded sheet disposed on the upper surface of the first arm is pushed up and separated from the upper surface of the flat plate of the clamp means.

As still another example of the method for separating the peripheral portion of the resin molded sheet held by the clamp means by the resin molded sheet separating means from the clamp means, the invention according to claim 7 is the invention according to claim 2. In the above-mentioned clamping device, the lifting mechanism is configured to include a clamp interlocking structure that pushes up a substantially peripheral portion of the resin molded sheet in conjunction with a clamping operation of the peripheral portion of the resin molded sheet by the clamping means. In the invention according to claim 7 configured as described above, the push-up mechanism is provided with a clamp interlocking structure that pushes up a substantially peripheral portion of the resin molded sheet in conjunction with a clamping operation of the peripheral portion of the resin molded sheet by the clamp means. The clamp operation includes an operation of clamping and holding the peripheral portion of the resin molded sheet and an operation of releasing the clamp. This clamp interlocking structure releases the clamp of the peripheral portion of the resin molded sheet by the clamp means. In conjunction with the case, the substantially peripheral portion of the resin molded sheet is pushed up. Thereby, in order to push up the substantially peripheral edge portion of the resin molded sheet, it is not necessary to independently form the pushing-up mechanism and operate the mechanism independently, so that the mechanism can be simplified.

As described above, the means for separating the resin molded sheet includes:
It is only necessary that the substantially peripheral portion of the resin molded sheet clamped and held by the clamp means can be separated from the clamp means. Therefore, the configuration for separating may be arranged individually, or an existing configuration may be used. As an example in which this latter configuration is adopted, the invention according to claim 8 is the clamp device according to claim 1, wherein the resin-molded sheet separating means includes:
The resin molded sheet is pushed up from a lower surface by a lower mold used for thermoforming of the resin molded sheet, so that a substantially peripheral portion of the resin molded sheet is separated from the clamp means. In the invention according to claim 8 configured as described above, the lower mold used for thermoforming the resin molded sheet by the resin molded sheet separating means is used.
Then, the lower surface of the resin molded sheet is pushed up by the lower mold, thereby separating a substantially peripheral portion of the resin molded sheet from the clamping means.

On the other hand, when the substantially peripheral edge portion of the resin molded sheet clamped and held by the clamp means is separated from the clamp means, the clamp means and the substantially peripheral edge portion may be relatively separated. Therefore, as described above, if the substantially peripheral portion of the resin molded sheet is pushed up with respect to the clamp means, it goes without saying that the resin molded sheet is relatively separated. Here, as another method for relatively separating the substantially peripheral portion of the resin molded sheet from the clamp means, the invention according to claim 9 is directed to the clamp apparatus according to claim 1, wherein the clamp means includes the resin resin sheet. In addition to having a flat frame structure on which the peripheral portion of the molded sheet can be placed, the resin molded sheet separating means includes support means for supporting substantially the peripheral edge portion of the resin molded sheet, and frame structure lowering for lowering the frame structure. And a mechanism. In the ninth aspect of the present invention, the clamping means is provided with a flat frame structure on which the peripheral portion of the resin molded sheet can be placed. Then, the resin molded sheet separating means is provided with support means for supporting a substantially peripheral portion of the resin molded sheet, and a frame structure lowering mechanism for lowering the frame structure. At this time, when the substantially peripheral part of the resin molded sheet placed on the frame structure of the clamp means is separated from the clamp means, while supporting the substantially peripheral part by the support means,
Lower the frame structure itself. Thereby, it becomes possible to separate the substantially peripheral portion of the resin molded sheet from the clamp means.

Also, the method of clamping and holding the resin-molded sheet during thermoforming and separating the substantially peripheral portion of the clamped resin-molded sheet is not necessarily limited to a substantial device. It is easy to understand that also works. For this reason, the invention according to claim 10 is a method of clamping a resin molded sheet for clamping and holding a resin molded sheet during thermoforming, wherein the clamp is configured to clamp and hold a substantially peripheral portion of the resin molded sheet. And a resin molded sheet separating step of separating a substantially peripheral portion of the resin molded sheet held in the clamping step from the clamped portion. In other words, there is no difference in that the present invention is not necessarily limited to a substantial device and is also effective as a method.

[0018]

As described above, according to the present invention, it is possible to separate the substantially peripheral portion of the resin molded sheet from the clamp means by the resin molded sheet separating means. It is possible to provide a clamp device that can eliminate the necessity of intervening a manual operation of an operator. According to the second aspect of the present invention, the substantially peripheral portion of the resin molded sheet placed on the flat frame structure is pushed up by the lifting mechanism, so that the substantially peripheral portion can be separated from the clamp means. Become. Further, according to the third aspect of the present invention, it is possible to present a preferred specific configuration adopted for the lifting mechanism. Further, according to the invention according to claim 4, it is possible to form the projecting pin raising mechanism with a simple configuration. Furthermore, according to the invention according to claim 5, it is possible to regulate the upper end of the protruding pin flush with the upper surface of the flat plate except when the ascending is performed.

Further, according to the invention of claim 6,
Other configurations of the lifting mechanism can be presented. further,
According to the invention according to claim 7, still another configuration of the lifting mechanism can be presented. Further, according to the invention of claim 8, it is possible to separate the substantially peripheral portion of the resin molded sheet from the clamp means by using the lower mold. Further, according to the ninth aspect of the present invention, it is possible to separate the substantially peripheral portion of the resin molded sheet from the clamp means by operating the clamp means.
Further, according to the tenth aspect of the present invention, it is possible to provide a method of clamping a resin molded sheet capable of separating a substantially peripheral portion of the resin molded sheet held by being clamped from a clamped portion. .

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Here, embodiments of the present invention will be described in the following order. (1) About the concept of the invention: (2) About the configuration of the thermoforming device: (3) About the processing steps of the thermoforming device: (4) About the configuration of the clamp mechanism: (5) About the modified example of the clamp mechanism: (6) ) Regarding Other Modifications of Clamp Mechanism: (7) Summary: Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

(1) Regarding the Concept of the Invention: FIG. 1 is a technical concept diagram showing the technical concept of the clamp device according to the present invention. In the figure, the clamp device C has a configuration including a clamp unit C1 and a resin sheet separating unit C2. Here, the clamping means C1 is a resin molded sheet C
31 can be clamped and held at the periphery.
Therefore, the clamp means C1 clamps when holding the peripheral portion of the resin molded sheet C3, and releases the clamp when not holding. Then, the resin molded sheet separating means C2 separates the substantially peripheral portion of the resin molded sheet C3 which has been clamped by the clamp means C1, that is, the unclamped resin molded sheet C3 from the clamp means C1. Thus, by separating the substantially peripheral portion of the resin molded sheet C3, the peripheral portion of the resin molded sheet C3 can be removed from the clamp means C1. Accordingly, when removing the peripheral portion of the resin molded sheet C3 from the clamping means C1, the operator does not need to manually lift the peripheral portion of the resin molded sheet C3.
Therefore, the clamping device C according to the present invention makes it possible to improve the work efficiency of the work of removing the resin molded sheet C3.

(2) Configuration of thermoforming apparatus: FIG.
1 is a schematic configuration diagram showing a schematic configuration of a thermoforming apparatus capable of performing a method for heating a resin molded sheet according to the present invention.
In the figure, a thermoforming device 10 has a plug 11 disposed above and a molding die 12 disposed below. On the upper surface of the plug 11, a plug cylinder 11a is provided.
Is connected, and the plug 11 can be vertically driven downward by the operation of the plug cylinder 11a. A molding cylinder 12a is connected to the lower surface of the molding die 12, and the molding die 12 can be vertically driven upward by the operation of the molding cylinder 12a. Then, between the plug 11 and the molding die 12, the sheet surface of the resin molded sheet S is
And a clamp mechanism 13 for holding it toward the mold 12. The clamp mechanism 13 holds the resin molded sheet S by clamping a peripheral portion of the resin molded sheet S.

Here, the upper heater unit 14 includes an upper heater moving unit 14a formed to be movable forward and backward between the plug 11 and the clamp mechanism 13, and a lower surface of the upper heater moving unit 14a has The upper heater 14b is disposed so as to face the resin molded sheet S when the upper heater moving unit 14a enters between the plug 11 and the clamp mechanism 13. On the other hand, the lower heater unit 15 includes a lower heater moving unit 15a formed so as to be able to move forward and backward between the molding die 12 and the clamp mechanism 13, and the lower heater moving unit 15a
When the lower heater moving unit 15a enters between the molding die 12 and the clamp mechanism 13,
The lower heater 15b is disposed so as to face the resin molded sheet S. In addition, a vacuum suction passage 12b is formed on the bottom surface of the molding die 12, and this vacuum suction passage 1b is formed.
2b is connected to the vacuum tank 12c. A cooling fan 16 is provided above the thermoforming device 10.

(3) Processing Steps of Thermoforming Apparatus: Next, processing steps of the thermoforming processing of the thermoforming apparatus 10 configured as described above will be described. FIG. 3 is a process diagram showing a schematic process of this operation. In the figure, first, in step S100, the resin molded sheet S is
3 and clamped and held.
And a mold 12 at a predetermined position. When the resin molding sheet S is placed at a predetermined position by the clamp mechanism 13, the upper heater moving unit 14 is moved to step S200.
a of the upper heater unit 14 and the plug 11
And the upper heater 14b is stopped at a position facing the resin molded sheet S. Simultaneously with the movement of the upper heater unit 14, the movement of the lower heater moving unit 15a is controlled to move the lower heater unit 15 between the molding die 12 and the clamp mechanism 13, and the lower heater 15b is moved by the resin molding sheet S. Stop at a position facing.

Then, in step S300, the upper heater 1
4b and the lower heater 15b.
The upper and lower surfaces of the resin molded sheet S are heated to a predetermined temperature by the radiant heat output from b and 15b, and the resin molded sheet S is thermoplasticized. When the plasticization of the resin molded sheet S is completed, the upper and lower heater units 14 and 15 are controlled to move between the plug 11 and the clamp mechanism 13 and between the molding die 12 and the clamp in step S400. It is retracted from between the mechanism 13. Next, the plug 11 is moved down by driving the plug cylinder 11a in step S500. At the same time, the molding die 12 is raised by driving the molding die cylinder 12a.

Then, the resin molded sheet S is
While pressing the mold against the mold surface of the mold 12, the vacuum tank 12c
Is operated to draw a vacuum from the bottom surface of the molding die 12 through the vacuum suction passage 12b. Then, the resin molded sheet S that is substantially in close contact with the mold surface of the molding die 12 while being pressed by the plug 11 is brought into close contact with the molding die 12 by suction by the vacuum, and is formed into a shape corresponding to the mold surface. Thereby, a molded article is molded. When the molding is completed, the operation of the vacuum tank 12c is stopped, and the plug 11 is raised by the plug cylinder 11a and returns to the predetermined position. Similarly, the mold 12 is a mold cylinder 12a.
To return to a predetermined position. And
In step S600, the cooling fan 16 is operated to cool the resin molded sheet S on which the molded product is formed. Finally, in step S700, the clamp mechanism 13 is released and the molded product is taken out.

As described above, in this embodiment,
In removing the resin molded sheet S on which a molded article is formed in step S700, the peripheral portion of the resin molded sheet S placed on the clamp frame 13a of the clamp mechanism 13 is separated from the upper surface of the clamp frame 13a and removed. . At this time, the operator lifts and removes the molded product while putting his / her finger between the upper surface of the clamp frame 13a and the lower surface of the peripheral portion to separate them. At this time, if the weight of the molded product is heavy, the worker needs a large force to insert his finger between the upper surface of the clamp frame 13a and the lower surface of the peripheral portion of the resin molded sheet S of the molded product. bad.
In addition, when the temperature of the upper surface of the clamp frame 13a is high, it is necessary to wait for the operation to be performed until the temperature decreases, and the operation efficiency is reduced.

On the other hand, the resin molded sheet S
It is also conceivable to remove the molded product from the clamp mechanism 13a by sucking the substantially peripheral portion of the molded product. May be dropped. Therefore, in the present embodiment, by constructing a mechanism for lifting the substantially peripheral portion of the resin molded sheet S placed on the upper surface of the clamp frame 13a in the clamp mechanism 13, without the manual operation of the operator,
The resin molded sheet S can be removed from the upper surface of the clamp frame 13a. Next, a schematic configuration of the clamp mechanism 13 that can lift and separate the peripheral edge portion of the resin molded sheet S will be described.

(4) Structure of clamp mechanism: FIG.
FIG. 3 is a configuration diagram showing a schematic configuration of a clamp mechanism 13. In FIG. 1, the clamp mechanism 13 includes a clamp frame 1.
3a and a spring clamp 13b.
Then, a resin molded sheet S (not shown) is placed on the clamp frame 13a, and a peripheral portion of the resin molded sheet S is clamped by a spring clamp portion 13b so that the resin molded sheet S can be held by the clamp mechanism 13. Has become. Here, a substantially rectangular opening A is formed in the center of the clamp frame 13a, and the plug 11 and the molding die 12 are moved up and down with respect to the opening A, so that the clamped resin molded sheet is formed. S can be formed.

FIG. 5 is an external perspective view in which main parts of the clamp mechanism 13 are enlarged. In FIG.
3b, a lower clamp control shaft 13b2 rotatably supported by a shaft support 13b1 fixed to the periphery of the opening A;
There are provided a plurality of clamp pieces 13b3 attached to the lower clamp control shaft 13b2 and configured by leaf springs. The lower clamp control shaft 13b2 has a lever 1 connected to a rod 13b5 of an air cylinder 13b4.
3b6 is attached. Here, the above-mentioned clamp piece 13b3 can be increased or decreased by adding or removing the lower clamp control shaft 13b2 from the axial direction. Air cylinder 1
3b4 is swingably supported by an air cylinder support shaft 13b7 in accordance with the operation.

In such a configuration, when clamping the resin molded sheet S, the rod 13b5 is pulled backward by the air cylinder 13b4 by the air cylinder 13b4, and the lever 13b6 is tilted toward the air cylinder 13b4 to clamp each clamp piece 13b3. The resin molded sheet S is supplied to the opening A while being separated from the upper surface of the frame 13a. When the air cylinder 13b4 is driven and the rod 13b5 is extended forward, the lever 13b6 rises in the direction away from the air cylinder 13b4, and the lower clamp control shaft 13b2 opens each clamp piece 13b3 through the opening A.
Rotate in the direction of pushing down. By this rotation, each clamp piece 13b3 is pressed against the upper surface of the clamp frame 13a with the peripheral portion of the resin molded sheet S interposed therebetween.
Thereby, the peripheral portion of the resin molded sheet S is clamped and held by the clamp frame 13a.

FIG. 6 is a configuration diagram showing the configuration of the protruding pins provided on the clamp frame 13a, and FIG.
It is sectional drawing which showed the cross section of this protruding pin. In the figure, a protruding pin 20 includes a pin upper end 21, a pin shaft 22,
The configuration includes a push-up receiving portion 23, a spring portion 24, and a washer 25. The protruding pin 20 has a substantially H-shaped cross section. A substantially circular pin upper end 21 is formed on the upper end surface, and a substantially circular push-up receiving portion 23 is formed on the lower end surface. ing.

The projecting pin 20 is supported by the clamp frame 13a by inserting the pin shaft 22 into a hole 25a formed in the washer 25 and fixing the washer 25 to the clamp frame 13a. . A spring portion 24 is provided between the washer 25 of the pin shaft 22 and the push-up receiving portion 23.
Is inserted, and by the urging force of the spring portion 24,
The upper surface of the pin upper end 21 can be regulated by the upper surface of the clamp frame 13a. A pin upper end 2 is provided on the clamp frame 13a.
1 is formed, and the pin upper end portion 21 of the projecting pin 20 can protrude and retract from the upper surface of the clamp frame 13a through the pin upper end opening 13c. It has become.

FIG. 8 is a side view of a state where the peripheral portion of the resin molded sheet S is placed on the upper surface of the clamp frame 13a as viewed from the side. In the figure, a predetermined number of protruding pins 20 having the above-described configuration are disposed on the clamp frame 13a. In the present embodiment, the projecting pin 20 is disposed at a position where the upper surface of the pin upper end 21 is placed on the peripheral portion of the resin molded sheet S. In the present embodiment, FIG.
The cylinder device 30 is installed on the molding die side surface 12b of the molding die 12 as shown in FIG. The cylinder device 30 is installed corresponding to the protruding pin 20 installed on the clamp frame 13a. Here, the cylinder body 31 of the cylinder device 30
Is fixed to the molding die side surface 12b by a predetermined cylinder device fixing structure 12c arranged on the molding die side surface 12b, and the cylinder shaft 32 can be vertically driven with respect to the fixed cylinder body 31.

FIG. 10 is a side view showing a state in which the cylinder device 30 is operated. FIG. 3 shows a case where the cylinder device 30 is operated so that the cylinder shaft 32 is raised. When the cylinder shaft 32 rises, the upper end thereof comes into contact with the push-up receiving portion 23 and pushes up the push-up receiving portion 23. As a result, the entire protruding pin 20 is pushed upward. Then, the peripheral portion of the resin molded sheet S placed on the upper surface of the pin upper end portion 21 is lifted. At this time, the spring portion 24 is
It is shrunk by a rising force of zero. Then, when the cylinder device 30 is operated so that the cylinder shaft 32 is lowered, the pushing-up receiving portion 23 is pushed down by the urging force of the spring portion 24 along with the lowering operation, and the upper end of the cylinder shaft 32 is moved upward. From the protruding pin 20
Returns to the position before pushing up, and the upper surface of the pin upper end portion 21 is regulated with respect to the upper surface of the clamp frame 13a.

FIG. 11 shows a state in which the projecting pins 20 and the like are connected to the clamp frame 1.
It is the side view which looked at the clamp mechanism 13 from the side when it was arrange | positioned at 3a. FIG. 3 shows a state in which the clamp on the peripheral portion of the resin molded sheet S by the clamp mechanism 13 is released. At this time, when releasing the clamp, the air cylinder 13b4 is operated to
b5 is drawn behind the air cylinder 13b4. Then, since the lever 13b6 is tilted to the side of the air cylinder 13b4, each of the clamp pieces 13b3 rises away from the clamp frame 13a. Thereby, the clamp on the peripheral portion of the resin molded sheet S is released.

Then, as described above, the cylinder device 30
Is operated to raise the cylinder shaft 32, the entire protruding pin 20 rises, and the peripheral edge of the resin molded sheet S placed on the pin upper end 21 is lifted. At this time,
The resin molded sheet S is lifted upward from the upper end of each clamp piece 13b3 rising upward. Accordingly, the operator grips the peripheral edge B of the resin molded sheet S lifted by the protruding pins 20 and pulls out the resin molded sheet S, thereby clamping the resin molded sheet S to the clamping mechanism 1.
3 can be removed. Here, in the present embodiment, as described above, when the resin molded sheet S is pushed up by the protruding pins 20, the resin molded sheet S is lifted above the upper end of each clamp piece 13b3. The projecting pin 20 and the cylinder device 30 are configured.

In the embodiment described above, the configuration in which the cylinder device 30 is disposed on the side surface 12b of the molding die is employed. The configuration of the cylinder device 30 is not limited to the configuration disposed on the molding die side surface 12b, and may be appropriately disposed in accordance with the configuration and dimensions of the thermoforming device 10, and may be disposed on the lower surface of the thermoforming device 10. Is also good. Further, in the present embodiment, the configuration in which the cylinder device 30 corresponding to the protruding pin 20 disposed on the clamp frame 13a is adopted, but when the protruding pin 20 is pushed up by the cylinder device 30, each protruding pin 20 The configuration is not limited to the configuration in which the cylinder device 30 is arranged for each of the cases. For example, FIG.
As shown in (2), a configuration may be adopted in which a push-up plate 303 is disposed at the upper end of the cylinder shaft 302 of the two cylinder devices 300, 300, and the push-up plate 303 pushes up the plurality of projecting pins 20. In such a case, the number of cylinder devices to be arranged can be reduced, so that the device configuration can be simplified and the manufacturing cost can be reduced.

(5) Modification of Clamping Mechanism: The gist of the present invention is that the resin molded sheet S can be easily removed by lifting and separating the peripheral portion of the resin molded sheet S clamped by the clamp mechanism 13. Is to do. From that viewpoint, it is sufficient that the peripheral portion of the resin molded sheet S can be lifted, and the mechanism is not limited to the combination of the protruding pin 20 and the cylinder device 30.

Next, FIG. 13 and FIG.
Another configuration in which the peripheral portion of the resin molded sheet S placed on 3a can be lifted to separate the resin molded sheet S from the upper surface of the clamp frame 13a is shown. FIG. 13 shows a sectional view of the clamp frame 13a and FIG.
4 shows a top view of the clamp frame 13a. In the present embodiment, a substantially U-shaped lifting arm 40 is provided on the clamp frame 13 a of the clamp mechanism 13. The lifting arm 40 includes a first arm 41 and a second arm 4.
2 and an arm rotation shaft 43. Here, the first arm portion 41 is formed in a substantially long box shape whose longitudinal direction faces the short width direction of the clamp frame 13a.

The second arm 42 is provided with the first arm 41.
From the inside end of the clamp frame 13a to the clamp frame 13a
It extends so that it may incline inward. Further, a rotation shaft 43 is formed at the end of the first arm portion 41. The first arm portion 41 is provided on the clamp frame 13a.
13d is formed. A hole (not shown) for accommodating the rotating shaft 43 is formed in a side surface of the arm receiving opening 13d, and the rotating shaft 43 is inserted into the center of the arm receiving opening 13d. Then, the first arm 41 and the second arm 42 are made rotatable with respect to the clamp frame 13a.

FIG. 15 is a sectional view of the clamp frame 13a showing a state where the lifting arm 40 is rotated. FIG. 5 shows a state in which the lifting arm 40 is rotated by pulling out the second arm portion 42 to the outside of the clamp frame 13a. Thus, when the second arm portion 42 is pulled out, the lifting arm 40 rotates clockwise about the rotation shaft 43. Therefore, the first arm portion 41 protrudes from the upper surface of the clamp frame 13a. At this time, since the peripheral portion of the resin molded sheet S is placed on the upper surface of the first arm portion 41, the peripheral portion is lifted by this projection. This makes it possible to separate the peripheral portion of the resin molded sheet S from the upper surface of the clamp frame 13a.

(6) Other Modifications of the Clamping Mechanism: In the above-described embodiment, the peripheral portion of the resin molded sheet S is lifted to separate the peripheral portion from the upper surface of the clamp frame 13a. I was letting it. As described above, when the peripheral portion is separated, it goes without saying that the upper surface of the clamp frame 13a may be relatively separated from the resin molded sheet S. Accordingly, as described above, the peripheral portion of the resin molded sheet S may be moved to be separated by lifting, or may be separated by moving the clamp frame 13a.

FIG. 16 shows a configuration in which the periphery of the resin molded sheet S can be separated from the upper surface of the clamp frame 13a by moving the clamp frame 13a.
FIG. 17 is a top view of such a configuration when viewed from above the clamp frame 13a. In the figure, four ball screws 51 are erected upward at substantially four corners of a lower pedestal 50 of the thermoforming device 10 on which the forming die 12 and the like are placed. Then, screw holes 13e through which the four ball screws 51 can be inserted are formed at the four corners of the clamp frame 13a. One of the ball screws 51 is connected directly or indirectly to the rotation shaft of a drive motor 52 disposed inside the lower pedestal 50. The ball screw 51 to which the drive motor 52 is connected is , The drive motor 52
Rotates in accordance with the rotational drive of. The clamp frame 13a can move up and down based on the rotation of the ball screw 51. Here, in the present embodiment, a plurality of resin molded sheet support shafts 53 are erected on the lower pedestal 50 so as to face upward.

A support portion 53a is formed at the upper end of the resin molded sheet support shaft 53, and the resin molded sheet support shaft 53 is formed of a resin molded sheet S on which the support portion 53a is mounted on the clamp frame 13a. It stands upright so as to be arranged on the lower surface of the peripheral portion. Further, a support portion opening 13f is formed in the clamp frame 13a in accordance with the support portion 53a so that the support portion 13a can be inserted. With such a configuration, when the clamp mechanism 13 clamps and holds the peripheral portion of the resin molded sheet S and performs thermoforming, the upper surface of the clamp frame 13a is flush with the upper surface of the support portion 53a. The position is determined by the ball screw 51 at the position. When the clamp is released and the peripheral portion of the resin molded sheet S is separated from the upper surface of the clamp frame 13a, the drive motor 52 is connected to the clamp frame 13a.
Is driven in the rotating direction in which is lowered.

FIG. 18 is a configuration diagram showing a state in which the clamp frame 13a has moved down. In the figure, when the clamp frame 13a is lowered, the support portion 5 is moved from the support portion opening 13f.
3a relatively protrudes from the upper surface of the clamp frame 13a.
Then, the peripheral portion of the resin molded sheet S is
3a. Thereby, the worker can remove the resin molded sheet S from the clamp mechanism 13 by grasping the peripheral edge C of the resin molded sheet S lifted by the support portion 53a and pulling out the resin molded sheet S. .

In the above-described embodiment, the configuration based on the clamp mechanism 13 has been adopted. However, the mechanism for clamping the peripheral portion of the resin molded sheet S is not limited to such a clamp mechanism 13. Absent. Therefore, it goes without saying that the configuration for separating the peripheral portion of the resin molded sheet S from the upper surface of the clamp frame 13a is not limited to the configuration described above. It goes without saying that depending on the clamp mechanism, the peripheral portion of the resin molded sheet S can be separated from the upper surface of the clamp frame 13a in conjunction with the clamp operation of the clamp mechanism.

(7) Conclusion: As described above, a predetermined number of protruding pins 20 are arranged on the clamp frame 13a of the clamp mechanism 13, and the cylinder device 30 corresponding to the protruding pins 20 is arranged on the side surface 12b of the molding die. , Resin molded sheet S
By moving the cylinder shaft 32 of the cylinder device 30 upward to separate the peripheral portion of the pin from the upper surface of the clamp frame 13a, the pin upper end 21 of the projecting pin 20 is moved.
By projecting from the upper surface of the clamp frame 13a,
It is possible to separate the peripheral portion of the resin molded sheet S from the upper surface of the clamp frame 13a. by this,
When removing the resin molded sheet S from the clamp mechanism 13, the operator does not need to manually intervene.

[Brief description of the drawings]

FIG. 1 is a technical conceptual diagram showing a technical concept of a clamp device according to the present invention.

FIG. 2 is a schematic configuration diagram showing a schematic configuration of a thermoforming apparatus capable of performing a method for heating a resin molded sheet according to the present invention.

FIG. 3 is a process diagram showing processing steps of a thermoforming process of the thermoforming apparatus.

FIG. 4 is a configuration diagram showing a schematic configuration of a clamp mechanism.

FIG. 5 is an external perspective view in which main parts of the clamp mechanism are enlarged.

FIG. 6 is a configuration diagram showing a configuration of a protruding pin provided on a clamp frame.

FIG. 7 is a sectional view showing a section of a protruding pin.

FIG. 8 is a side view of a state where a peripheral portion of a resin molded sheet is placed on an upper surface of a clamp frame as viewed from the side.

FIG. 9 is a side view showing a side surface of a molding die.

FIG. 10 is a side view showing a state where the cylinder device is operated.

FIG. 11 is a side view of the clamp mechanism viewed from the side when a protruding pin is disposed on the clamp frame.

FIG. 12 is a configuration diagram showing another configuration of the cylinder device.

FIG. 13 is a configuration diagram showing another configuration capable of separating the peripheral portion of the resin molded sheet from the upper surface of the clamp frame.

FIG. 14 is a top view of such a configuration.

FIG. 15 is a configuration diagram when such a configuration is operated.

FIG. 16 is a configuration diagram showing a configuration in which a clamp frame is moved to separate a peripheral portion of a resin molded sheet from an upper surface of the clamp frame.

FIG. 17 is a top view of such a configuration.

FIG. 18 is a configuration diagram when such a configuration operates.

[Explanation of symbols]

 12c ... Vacuum tank 13a ... Clamp frame 13b3 ... Clamp piece 13b4 ... Air cylinder 13b5 ... Rod 13b6 ... Lever 13b7 ... Air cylinder support shaft 20 ... Protruding pin 21 ... Pin upper end part 22 ... Pin shaft 23 ... Push-up receiving part 24 ... Spring part 25 ... Washer 30 ... Cylinder device 31 ... Cylinder body 32 ... Cylinder shaft B ... Peripheral edge S ... Resin molded sheet

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3J022 DA11 EA42 EB01 EC04 ED06 FB03 FB12 GA06 GA11 GB23 GB28 4F202 AC03 CA17 CB01 CM21 CM90 4F208 AC03 AG01 MK20 MW02

Claims (10)

[Claims] A clamp means for clamping and holding a peripheral portion of a resin molded sheet, and a resin molded sheet separating means for separating a substantially peripheral portion of the resin molded sheet held by the clamp means from the clamp means. A clamping device comprising: 2. The clamping device according to claim 1, wherein the clamping means has a flat frame structure on which a peripheral portion of the resin molded sheet can be placed, and the resin molded sheet separating means includes A clamping device comprising a push-up mechanism capable of pushing up a substantially peripheral portion of a resin molded sheet placed on a frame structure of a flat plate from the flat plate. 3. The clamping device according to claim 2, wherein the lifting mechanism is disposed on a lower surface of a substantially peripheral portion of the resin molded sheet and is capable of protruding and retracting upward from a flat upper surface of the frame structure. A clamp device comprising: a protruding pin provided; and a protruding pin raising mechanism for raising the protruding pin upward. 4. The clamp device according to claim 3, wherein the projecting pin raising mechanism is formed by an air cylinder. 5. The clamping device according to claim 3, wherein the protruding pin includes a protruding pin urging means capable of urging the upper end of the pin flush with the upper surface of the flat plate. A clamping device comprising: 6. The clamping device according to claim 2, wherein the push-up mechanism includes a first arm disposed on a lower surface of a substantially peripheral portion of the resin molded sheet, and a substantially end of the first arm. And a second arm portion extending from the pivot-side end portion of the first arm portion to below the frame structure. apparatus 7. The clamp device according to claim 2, wherein the lifting mechanism interlocks with a clamping operation of the peripheral portion of the resin molded sheet by the clamping means and pushes up a substantially peripheral portion of the resin molded sheet. A clamping device comprising an interlocking structure. 8. The clamping device according to claim 1, wherein the resin-molded sheet separating means pushes up the resin-molded sheet from a lower surface by a lower mold used for thermoforming the resin-molded sheet, thereby forming the resin-molded sheet. A clamp device for separating a substantially peripheral portion of a formed sheet from the clamp means. 9. The clamping device according to claim 1, wherein the clamping means has a flat frame structure on which a peripheral portion of the resin molded sheet can be placed, and the resin molded sheet separating means has A clamping device comprising: a supporting means for supporting a substantially peripheral portion of a resin molded sheet; and a frame structure lowering mechanism for lowering the frame structure. 10. A method of clamping a resin molded sheet for clamping and holding a resin molded sheet during thermoforming, comprising: a clamping step of clamping and holding a substantially peripheral portion of the resin molded sheet; A resin-molded sheet separating step of separating a substantially peripheral portion of the resin-molded sheet held by the step from the clamp portion.