JP4433098B2 - Sheet clamp device - Google Patents

Description

  The present invention relates to a sheet clamp device. More specifically, the present invention relates to a sheet clamping apparatus capable of automatically adjusting the width of a clamp position for holding four sides of a resin sheet in accordance with the dimensions of the resin sheet in a molding apparatus for thermoforming or vacuum forming a thermoplastic resin sheet.

Conventionally, when a rectangular resin sheet is pressure-molded by an upper and lower mold, the peripheral portion of the resin sheet is clamped to hold the whole, and when the molded resin sheet is taken out, a clamp device is used to release the clamped state. A sheet holding device comprising a first drive means having a first ball screw mechanism mounted on a plate-shaped plate member, a second drive means having a second ball screw mechanism, and a plurality of gripping mechanisms with actuators that can be turned up and down. Yes (see Patent Document 1).
The gripping mechanism with an actuator is configured to rotate a clamp presser that clamps a peripheral portion of a resin sheet by an actuator fixed to the first and second strip members.

JP 11-156931 A

In the conventional holding device, a plurality of clamp pressing claws are produced in accordance with the width dimension of a specific resin sheet. Therefore, when molding resin sheets with different material dimensions, it is necessary to adjust the clamp pressing width. is there.
However, in the conventional holding device, in order to adjust the width, it is possible to perform a work of collectively exchanging the clamp holding member and the band plate portion corresponding to the clamp receiving material manually according to the material size to be changed. is there. Or, when changing to a material with larger dimensions, add a clamp holder and clamp holder of the required length, or conversely, when changing to a material with smaller dimensions, clamp holders and clamps that are not necessary for this smaller material. Work to remove the receiving material.
Thus, conventionally, since the width of the clamp presser in the clamp apparatus is manually adjusted, there is a problem in that the productivity of the molding apparatus that has been automated in recent years is likely to be lowered.
In addition, there is a problem in terms of safety because it is necessary for an operator to enter the molding apparatus and perform width adjustment.

  In view of the above circumstances, an object of the present invention is to provide a sheet clamping device capable of automatically adjusting the width of the clamp position according to the dimensions of the resin sheet.

  The sheet clamp device of the present invention is a sheet clamp device that holds four sides of a thermoplastic resin sheet, and an outer frame assembled with four strips and two opposite sides of the resin sheet in the outer frame. A first width adjusting mechanism for moving a predetermined number of first clamp pressers arranged toward the two sides and clamping the edge of the resin sheet; and the other two sides facing the resin sheet A second width adjusting mechanism that moves a predetermined number of second clamp pressers arranged toward the other two sides and clamps an edge of the resin sheet, the predetermined number Among the first clamp press and the second clamp press, the first clamp press and the second clamp press arranged toward the corner of the resin sheet are movable along the side of the resin sheet. Member is characterized by comprising linked to the first clamp holding the second clamp retainer which is disposed toward the corner portion of the resin sheet.

According to the present invention, the resin is provided with the interlocking member that allows the first clamp presser and the second clamp presser arranged to face the corner of the resin sheet to move along the side of the resin sheet. Even if the width dimension of the sheet changes, the clamp position can be automatically adjusted according to the dimensions of the resin sheet without replacing, adding and removing the clamp presser, so the productivity of the molding equipment can be improved. .
Further, since the worker does not enter the molding apparatus for the width adjustment work, safety can be ensured.

Hereinafter, the sheet clamp device of the present invention will be described with reference to the accompanying drawings. As shown in FIGS. 1 to 3, a sheet clamp device according to an embodiment of the present invention includes an outer frame 1 assembled with four strips 1 a, 1 b, 1 c, and 1 d, and is disposed in the outer frame 1. A first clamp presser 11b and a second clamp presser 21b arranged toward the corners of the first width adjusting mechanism A, the second width adjusting mechanism B, and the resin sheet S that are provided along the side of the resin sheet S. An interlocking member C that is movable is provided. The interlocking member C has an L shape and includes a first interlocking member C1 connected to the first clamp presser 11b and a second interlocking member C2 connected to the second clamp presser 21b.
In addition, the resin sheet S in a figure has shown the resin sheet of the minimum dimension. In the present embodiment, the width of the clamp position can be automatically adjusted in accordance with the width dimension of the rectangular resin sheet S. In the present invention, the width is adjusted to the width dimension of the square resin sheet. The width can be adjusted.

  The first width adjusting mechanism A has an edge of the resin sheet S by a predetermined number of first clamp holders 11a and 11b arranged toward two opposing long sides of the resin sheet S in the outer frame 1. A mechanism for clamping Sa, a pair of first width adjustment screw members A1 having a first width adjustment screw portion A1a that can be rotated forward and backward by a forward rotation screw and a reverse rotation screw, and the pair of first width adjustment screws A first drive means A2 connected to one of the members A1, a first transmission shaft A3 connected to an end of the width adjustment screw portion A1a of the pair of first width adjustment screw members A1, and the pair of first It comprises a pair of first clamp mechanisms A4 whose both ends are connected by screwing to a first width adjustment screw portion A1a that can rotate forward and backward of the width adjustment screw member A1. The predetermined number is set to three along the edge Sa of the resin sheet S, and in the present embodiment, the first clamp presser is one first fixedly attached to the inside along the long side. 1 clamp presser 11a, and two first clamp pressers 11b attached in a state of being movable outward along the long side. In the present invention, the present invention is not limited to this, and can be appropriately selected according to the difference between the maximum dimension and the minimum dimension of the resin sheet. In order to clamp the resin sheet, it is preferable to fix the central first clamp press and move the outer first clamp press as in the present embodiment.

The pair of first width adjusting screw members A1 is pivotally supported by a bearing group 12 disposed on the inner walls of the pair of opposed strips 1a, 1b of the outer frame 1, and is paired with a pair of first and second rotatable members. It has a 1-width adjusting screw part A1a. Of the pair of first width adjustment screw portions A1a, one first width adjustment screw portion A1a is formed with a bevel gear for engaging the first transmission shaft A3 at the end. In FIGS. 1 and 2, reference numeral 12 represents one bearing on behalf of the bearing group.
As the first driving means A2, a driving motor can be used. And this 1st drive means A2 is comprised by the gear group so that a driving force can be transmitted to 1st width adjustment screw member A1.
The first transmission shaft A3 is provided with bevel gears at both ends and is pivotally supported by a bearing group 13 disposed on the inner wall of the strip 1c located between the pair of strips 1a and 1b. 1 and 2, reference numeral 13 represents one bearing on behalf of the bearing group.

As shown in FIGS. 1 and 3 to 4, the pair of first clamp mechanisms A <b> 4 are disposed toward the corners of the resin sheet S among the three first clamp presses 11 a and 11 b. It has 1st moving means A4a which enables movement of the 1st clamp presser 11b, and 1st rotation means A4b which enables this 1st clamp presser 11a, 11b to rotate.
Further, the first moving means A4a is not particularly limited as long as the width adjustment along the long side of the resin sheet S is possible, but in the present embodiment, the first clamp pressers 11a and 11b. A spline shaft 14 that is inserted through the attachment member 31 and a frame 15 that is disposed along the spline shaft 14 and that is connected to the nut portion 17 of the first width adjusting screw portion A1a. Yes. The frame 15 is inserted through a groove 30 formed in the second interlocking member C2.
The first turning means A4b may be hydraulic, pneumatic or electric, but in the present embodiment, a rotary actuator that rotationally drives the spline shaft 14 with air can be used.
The first rotation means A4b is connected to both ends of the spline shaft 14 arranged along the long side.
Compared with the case of only one side, the twist of the spline shaft 14 prevents the shaft end clamping force (the clamping force of the clamp presser connected to the spline shaft away from the rotating means) from being reduced, and two This is to reduce the size of one rotating means by using the rotating means, and a total of four first rotating means A4b are used.

  As shown in FIG. 2, the transmission path of the first width adjusting mechanism A includes a pair of first width adjusting screw members A1 disposed on the inner walls of the pair of strips 1a and 1b of the outer frame 1, and the first width adjusting mechanism A. A U-shaped transmission force path L1 is constituted by the first transmission shaft A3 disposed on the inner wall of the band plate 1c located between the pair of band plates 1a and 1b.

  The second width adjusting mechanism B has a predetermined number of second clamp pressers 21a and 21b disposed toward the other two short sides of the resin sheet S that are opposed to each other in the outer frame 1. A mechanism for clamping the edge Sb, a pair of second width adjustment screw members B1 having a second width adjustment screw portion B1a that can be rotated forward and backward by a forward rotation screw and a reverse rotation screw, and the pair of second widths The second drive means B2 connected to one of the adjustment screw members B1, the second transmission shaft B3 connected to the end of the width adjustment screw portion B1a of the pair of second width adjustment screw members B1, and the pair of The second width adjusting screw member B1 includes a pair of second clamp mechanisms B4 whose both ends are coupled to the second width adjusting screw portion B1a that can rotate forward and backward. The predetermined number is set to three along the edge Sb of the resin sheet S. In the present embodiment, the second clamp presser is a single fixedly attached inside along the short side. They are the 2nd clamp press 21a and the two 1st clamp presses 21b attached to the state which can move outside along a short side. In the present invention, the present invention is not limited to this, and can be appropriately selected according to the difference between the maximum dimension and the minimum dimension of the resin sheet. In order to clamp the resin sheet, it is preferable to fix the central second clamp press and move the outer second clamp press as in the present embodiment.

The pair of second width adjusting screw members B1 are pivotally supported by a bearing group 22 disposed on the inner walls of the pair of opposed strips 1c, 1d of the outer frame 1, and are paired with a pair of first and second rotatable members. A two-width adjusting screw portion B1a is provided. Of the pair of second width adjustment screw portions B1a, one second width adjustment screw portion B1a is formed with a bevel gear for engaging the second transmission shaft B3 at the end. 1 and 2, reference numeral 22 represents one bearing on behalf of the bearing group.
A drive motor can be used as the second drive means B2. And this 2nd drive means B2 is comprised by the gear group so that a driving force can be transmitted to 2nd width adjustment screw member B1.
The second transmission shaft B3 is provided with bevel gears at both ends, and is supported by a bearing group 23 disposed on the inner wall of the strip 1b located between the pair of strips 1c and 1d. 1 and 2, reference numeral 23 represents one bearing on behalf of the bearing group.
As shown in FIG. 1 and FIGS. 3 to 4, the pair of second clamp mechanisms B <b> 4 are arranged toward the corners of the resin sheet S among the three second clamp pressers 21 a and 21 b. It has 2nd moving means B4a which makes 2nd clamp press 21b movable, and 2nd turning means B4b which makes this 2nd clamp press 21a, 21b turnable.
Further, the second moving means B4a is not particularly limited as long as the width can be adjusted along the short side of the resin sheet S, but in the present embodiment, the second clamp pressers 21a and 21b. A spline shaft 24 engaged with and inserted through the mounting member 31, a frame 25 disposed along the spline shaft 24 and connected to the nut portion 27 of the second width adjusting screw portion B1, and the first And a linear guide member 26 disposed on the frame 25 so that the second interlocking member C2 connected to the two clamp pressers 21b can be moved. The frame 25 is inserted through a groove 20 formed in the first interlocking member C1.
The linear guide member 26 is not particularly limited, but in the present embodiment, a linear guide device including a slider and a rail is used.
The second rotating means B4b may be hydraulic, pneumatic or electric, but in the present embodiment, a rotary actuator that rotationally drives the spline shaft 24 with air can be used. The second rotating means B4b is connected to both ends of the spline shaft 24 disposed along the short side.
This is because, compared to the case of only one side, it is possible to reduce the clamping force at the shaft end due to the twist of the spline shaft 24 and to reduce the size of one rotating means by using two rotating means. A total of four second rotating means B4b are used.

  As shown in FIG. 2, the transmission path of the second width adjusting mechanism B includes a pair of second width adjusting screw members B1 disposed on the inner walls of the pair of strips 1c and 1d of the outer frame 1, and the second width adjusting mechanism B. A U-shaped transmission force path L2 is constituted by the second transmission shaft B3 disposed on the inner wall of the band plate 1b located between the pair of band plates 1c and 1d.

Furthermore, the sheet clamp apparatus of this Embodiment is demonstrated with reference to FIGS.
First, the first and second width adjusting screw members A1 and B1 can be rotated forward and backward by connecting right and left threaded ball screws as width adjusting screw portions A1a and B1a by a coupling 51. It has a structure. The first and second width adjusting screw members A1 and B1 may be structured such that the coupling 51 is omitted and the width adjusting screw portions A1a and B1a are provided on one shaft.
Transmission shafts A3 and B3 are connected to synchronize the pair of width adjusting screw members A1 and B1 on the opposite sides of the resin sheet S. The first width adjusting screw member A1 and the second width adjusting screw member B1 are orthogonal to each other and are attached at positions shifted vertically.

The frame 15 for adjusting the width along the long side is fixed to the two nut portions 17 screwed into the opposing width adjusting screw portion A1a, and the frame 25 for adjusting the width along the short side is opposed. It is fixed to two nut portions 27 that are screwed into the width adjusting screw portion B1a. For this reason, when the first and second driving means A2 and B2 are driven, the width between the clamp presses opposed by the interlocking width adjusting screw portions A1a and B1a and the nut portions 17 and 27 is changed. The necessary movement amount is automatically changed to the necessary clamp dimension by counting with the encoder 52.
For example, a rotary actuator is connected to both ends of the spline shaft 14 as a first rotation means A4b attached to the frame 15, and a second rotation means B4b attached to the frame 25 is connected to both ends of the spline shaft 24. For example, a rotary actuator is connected.

Next, the first moving means A4a and the second moving means B4a will be further described based on FIGS. 6 to 7 show the moving state of the first clamp presser 11b, and FIGS. 9 to 10 show the moving state of the second clamp presser 21b.
The first clamp retainers 11a and 11b are connected to the spline shaft 14 via an attachment member 31 that is engaged with the spline nut portion 14a, and the spline nut portion 24a is also fitted to the spline shaft 24. The second clamp pressers 21a and 21b are connected via the mounting member 31.
The clamp 61 assembled to the frame 15 does not hinder the rotation of the spline shaft 14 and fixes the first clamp presser 11a at the center clamp position of the long side. Also, the clamp 62 assembled to the frame 25 does not hinder the rotation of the spline shaft 24, and fixes the second clamp presser 21a to the short side center clamp position.
A linear guide member 26 is attached to the frame 25. The linear guide member 26 is provided with a second interlocking member C2 in which an engagement groove 29 for engaging the attachment member 31 for attaching the second clamp presser 21b and a groove 30 for passing the frame 15 are formed. It has been. Further, perpendicularly to the end portion of the second interlocking member C2, the engaging groove 19 for engaging the attachment member 31 for attaching the first clamp presser 11b, and the rail 25a of the frame 25 and the linear guide member 26 are passed. A first interlocking member C <b> 1 in which the groove 20 is formed is fixed by a bolt 32.
As shown in FIGS. 6 to 7 and FIGS. 9 to 10, the interlocking member C composed of the first and second interlocking members C1 and C2 includes the engagement grooves 19 of the first and second interlocking members C1 and C2. 29, by inserting the attachment member 31 for attaching the first clamp presser 11b and the second clamp presser 21b, the movement of the frame 15 is transmitted to the second clamp presser 21b, and the movement of the frame 25 is transmitted to the first clamp presser 11b. I have to. In addition, a play (gap) is provided in a portion where the attachment member 31 and the engagement grooves 19 and 29 are fitted so as not to hinder the rotation of the first and second clamp holders 11b and 21b.

Next, the first clamp retainers 11a and 11b and the second clamp retainers 21a and 21b will be further described with reference to FIGS.
The first clamp holders 11a and 11b arranged adjacent to each other are different in the shape of the concave and convex claws 41a and 41b provided on the inner side, and the planar shape is T-shaped as shown in FIG. Similarly, the second clamp pressers 21a and 21b arranged adjacent to each other are different in the shapes of the concave and convex claws 42a and 42b on the inner side, and the planar shape is T-shaped as shown in FIG. Presents.
That is, the heights of the claws 41a and 41b of the first clamp holders 11a and 11b and the clamp position of the resin sheet S are different, and the heights of the claws 42a and 42b of the second clamp holders 21a and 21b and the resin sheet S. The clamp position is different.
In the present embodiment, the first and second clamp holders 11b and 21b on the outer side arranged toward the corners of the resin sheet S by using the attachment members 31 having different heights are the first and second inner sides. It is arranged at a position higher than the clamp retainers 11a and 21a, and the heights of the claws 41b and 42b of the first and second clamp retainers 11b and 21b on the outside are the claws of the first and second clamp retainers 11a and 21a on the inner side. It is made higher than the height of 41a, 42a. The lengths L3a and L4b of the clamp positions of the claws 41b and 42b are longer than the lengths L3b and L4a of the clamp positions of the claws 41a and 42a, respectively. Therefore, even when the inner first and second clamp retainers 11a and 21a are moved to the outer first and second clamp retainers 11b and 21b, the inner first and second clamp retainers 11a and 21a are located above the inner first and second clamp retainers 11a and 21a. Since the outer first and second clamp retainers 11b and 21b overlap, interference during width adjustment can be prevented.
As shown in FIG. 11, the frame 15 also serves as a clamp receiver for the first clamp holders 11a and 11b so that the resin sheet S can be clamped. Further, as shown in FIGS. 4 and 12, an inner clamp receiver 43 is provided on the upper portion of the frame 25, and an outer clamp receiver 44 is provided on the second interlocking member C2 via a connecting member 44a disposed on the frame 25. Installed. As in the case of the first clamp holders 11a and 11b, the outer second clamp holder 21b overlaps the upper side of the inner second clamp holder 21a, thereby preventing interference during width adjustment. Reference numerals 14 and 24 are spline shafts.

In the present embodiment, the opening and closing of the first and second clamp retainers are operated at once by the first and second rotating means attached to the end of the spline shaft. The first and second rotating means for operating the first and second clamp holders are provided in the first and second clamp holders, together with the first and second rotating means. It can be set as the structure which moves a 2nd clamp presser. In this case, a linear guide device can be used instead of the spline shaft.
For example, the first moving means can be inserted into a straight guide member in which a first clamp holding member is disposed and a groove formed in the second interlocking member, and is disposed along the straight guide member. The frame may be connected to a nut portion of the first width adjusting screw portion, and the first rotating means may be connected to the first clamp presser.
The second moving means can be inserted into a linear guide member in which an attachment member for the second clamp presser is disposed and a groove formed in the first interlocking member and is disposed along the linear guide member. A frame connected to the nut portion of the second width adjusting screw portion, and a linear guide member that is inserted in the groove and arranged on the frame so that the second interlocking member can be moved, The second rotating means may be connected to the second clamp presser.

  Next, the operation of the sheet clamping apparatus configured as described above will be described with reference to the drawings. In order to easily explain the operation, the first clamp holders 11a and 11b and the second clamp holders 21a and 21b are alternately operated to approach the edges Sa and Sb of the resin sheet S. Can be approached at the same time. In the present embodiment, for convenience, the first clamp holders 11a and 11b and the second clamp holders 21a and 21b are moved in a clamped state.

First, as shown in FIG. 1, the first driving means A2 for adjusting the width along the short side is driven to rotate the nut portion 17 attached to the width adjusting screw portion A1a that can be rotated forward and backward. As a result, as shown in FIGS. 13 to 14, the frame 15 of the first moving means A <b> 4 that opposes moves inward (arrow direction H <b> 1), and the first clamp retainers 11 a (not shown) and 11 b are resin sheets It approaches the edge Sa on the long side of S.
At this time, the second interlocking member C2 connected to the first interlocking member C1 is pushed by the frame 15 engaged with the groove 30 (see FIG. 4) of the second interlocking member C2, and is orthogonally crossed. While moving in the arrow direction H1 along the linear guide member 26 provided on the arranged frame 25, the second clamp presser 21b is also connected to the interlocking member C2, so that it slides on the spline shaft 24 and moves in the arrow direction H1. To do.
As shown in FIG. 12, the claw 42b of the outer second clamp presser 21b covers and overlaps the claw 42a of the inner second clamp presser 21a, and the width adjustment is performed without interference between the clamp pressers.

Next, as shown in FIG. 1, the second driving means B2 for adjusting the width along the long side is driven to rotate the nut portion 27 attached to the width adjusting screw portion B1a capable of forward and reverse rotation. As a result, as shown in FIGS. 14 to 15, the frame 25 of the opposing second moving means B <b> 4 moves inward (arrow direction H <b> 2), and the second clamp pressers 21 a (not shown) and 21 b are resin sheets. It approaches the edge Sb on the short side of S.
At this time, the interlocking member C2 fixed to the frame 25 via the linear guide member 26 also moves in the arrow direction H2. Then, by the movement of the interlocking member C2, the outer first clamp presser 11b connected to the interlocking member C1 is pressed, and slides on the spline shaft 14 and translates along the frame 15 in the arrow direction H2.
In addition, as shown in FIG. 11, the claw 41b of the outer first clamp presser 11b covers and overlaps the claw 41a of the inner first clamp presser 11a, and the width adjustment is performed without interference between the clamp pressers.
In this way, as shown in FIG. 16, the outer first clamp holder 11b and the second clamp holder 21b arranged toward the corner of the resin sheet S are the first and second interlocking members C1, C2. To approach the end portions Sa and Sb of the resin sheet S.

By such an operation, the first and second driving means A2 and B2 adjust the first clamp holders 11a and 11b and the second clamp holders 21a and 21b to arbitrary positions in the width direction, and then the first rotating means A4b. When the spline shafts 14 and 24 are positively rotated by the second rotating means B4b, the rotational force is transmitted by the spline nut portion (not shown), whereby the first and second clamp retainers 11a, 11b, 21a and 21b. Rotates and the resin sheet S can be clamped.
And after conveying to a shaping | molding apparatus and completing a shaping | molding operation, the spline shafts 14 and 24 are reversely rotated by 1st rotation means A4b and 2nd rotation means B4b, and 1st, 2nd clamp presser 11a, 11b , 21a and 21b are rotated to unclamp the molded resin sheet S. Then, the first and second driving means A2 and B2 are reversely driven to separate the pair of first moving means A4a and the pair of second moving means B4a and to stand by at predetermined positions.

  As described above, in the present embodiment, the clamp presser is divided into a plurality of parts toward one side of the resin sheet, and the clamp position is reduced or enlarged by the movement of the pair of first and second moving means that are orthogonal to each other. As a result, even if the width dimension of the resin sheet changes, it is possible to adjust the clamp position steplessly without performing removal, replacement, or addition of the clamp holder and the clamp receiver as in the prior art. For this reason, the trouble of manual setup and replacement is saved, and workability is improved.

  The sheet clamp device according to the present invention can be used as a material conveying device of a thermoforming device or a vacuum forming device, thereby saving labor and time for manually removing, exchanging, and adding a clamp presser when changing material dimensions. Improve productivity by shortening setup time.

  In addition, since the sheet clamp device according to the present invention can adjust the width steplessly, the material dimensions can be finely adjusted. Reduced production becomes possible.

This application is based on Japanese Patent Application No. 2007-261642 filed on October 5, 2007 in Japan, the contents of which form part of the present application.
The present invention will also be more fully understood from the detailed description herein. However, the detailed description and specific examples are preferred embodiments of the present invention and are described for illustrative purposes only. This is because various changes and modifications will be apparent to those skilled in the art from this detailed description.
The applicant does not intend to contribute any of the described embodiments to the public, and the disclosed modifications and alternatives that may not be included within the scope of the claims are equivalent. Part of the invention under discussion.
In this specification or in the claims, the use of nouns and similar directives should be interpreted to include both the singular and the plural unless specifically stated otherwise or clearly denied by context. The use of any examples or exemplary terms provided herein (eg, “etc.”) is merely intended to facilitate the description of the invention and is not specifically recited in the claims. As long as it does not limit the scope of the present invention.

1 is a schematic plan view of a sheet clamp device according to an embodiment of the present invention. It is an expanded view of the outer frame of FIG. It is a perspective view of the lower left corner part of FIG. FIG. 4 is an exploded perspective view of FIG. 3. It is a principal part side view which shows the state which has the 1st clamp presser of the outer side of FIG. 1 in an expansion position. It is a principal part side view which shows the state which has the 1st clamp press of the outer side of FIG. 5 in the middle. It is a principal part side view which shows the state which has the 1st clamp presser of the outside of Drawing 6 in a contraction position. It is a principal part side view which shows the state which has the 2nd clamp press of the outer side of FIG. 1 in an expansion position. It is a principal part side view which shows the state which has the 2nd clamp press of the outer side of FIG. 8 in the middle. FIG. 10 is a side view of the main part showing a state in which the second clamp press on the outside of FIG. 9 is in the contracted position. It is the II sectional view taken on the line of FIG. It is the II-II sectional view taken on the line of FIG. It is a principal part perspective view explaining operation | movement of the sheet clamp apparatus in connection with this Embodiment. It is a principal part perspective view which shows the state of the width adjustment along a short side. It is a principal part perspective view which shows the state of the width adjustment along a long side. It is a top view which shows the completion state of width adjustment.

Explanation of symbols

A 1st width adjustment mechanism A1 1st width adjustment screw member A1a 1st width adjustment screw part A2 1st drive means A3 1st transmission shaft A4 1st clamp mechanism A4a 1st moving means A4b 1st rotation means B 2nd width Adjustment mechanism B1 Second width adjustment screw member B1a Second width adjustment screw portion B2 Second drive means B3 Second transmission shaft B4 Second clamp mechanism B4a Second movement means B4b Second rotation means C Interlocking member C1 First interlocking member C2 second interlocking member S resin sheet 1 outer frames 1a, 1b,
1c, 1d Band plates 11a, 11b First clamp retainers 12, 13 Bearing groups 14, 24 Spline shafts 15, 25 Frames 17, 27 Nut portions 19, 29 Engaging grooves 20, 30 Grooves 21a, 21b Second clamp retainers 26 Linear Guide member

Claims (8)

In the sheet clamp device that holds the four sides of the thermoplastic resin sheet,
An outer frame assembled with four strips,
A first width adjustment for moving a predetermined number of first clamp holders arranged toward two opposite sides of the resin sheet in the outer frame toward the two sides and clamping the edge of the resin sheet Mechanism,
A second width adjusting mechanism for moving a predetermined number of second clamp pressers arranged toward the two opposite sides of the resin sheet toward the other two sides and clamping the edge of the resin sheet And
Of the predetermined number of first clamp holders and second clamp holders, the first clamp holder and the second clamp holder arranged toward the corner of the resin sheet can be moved along the side of the resin sheet. A sheet clamp device in which the interlocking member is connected to a first clamp press and a second clamp press arranged toward the corner of the resin sheet. The interlocking member is
When the first clamp presser is moved toward the two opposing sides of the resin sheet, the first clamp presser arranged toward the corner of the resin sheet is arranged toward the corner of the resin sheet. A first interlocking member that interlocks the second clamp presser so as to be movable along the other two opposite sides of the resin sheet;
When the second clamp retainer is moved toward the other two opposite sides of the resin sheet, the second clamp retainer disposed toward the corner of the resin sheet is disposed toward the corner of the resin sheet. The sheet clamp apparatus according to claim 1, further comprising a second interlocking member that interlocks the first clamp presser that is movable along two opposing sides of the resin sheet. Among the predetermined number of first clamp presses, the height and the clamp position of the first clamp presses arranged adjacent to each other are different, and the predetermined number of second clamp presses are arranged adjacent to each other. The sheet clamp device according to claim 2, wherein the height and the clamp position of the claw of the second clamp presser are different. The first width adjusting mechanism is
A pair of first width adjusting screw members having a first width adjusting screw portion pivotally supported by a bearing group disposed on the inner walls of the pair of opposed strips of the outer frame and capable of rotating in the forward and reverse directions, A first driving means coupled to one of the one width adjusting screw members; and a pair of first width adjusting screws supported by a bearing group disposed on an inner wall of the band plate positioned between the pair of band plates Both ends of the first transmission shaft connected to the end of the width adjusting screw portion of the member and the first width adjusting screw portion of the pair of first width adjusting screw members which can be forward / reversely connected by screwing and the above It comprises a pair of first clamp mechanisms having first moving means for enabling movement of the first clamp presser and first rotating means for enabling rotation of the first clamp presser, and the second width adjusting mechanism includes ,
A pair of second width adjusting screw members having a second width adjusting screw portion pivotally supported by a bearing group disposed on the inner wall of the other pair of band plates orthogonal to the pair of band plates and capable of rotating forward and reverse; Second drive means connected to one of the pair of second width adjusting screw members, and the pair of shafts supported by a bearing group disposed on the inner wall of the band plate located between the other pair of band plates. Both end portions of the second transmission shaft connected to the end of the second width adjusting screw portion of the second width adjusting screw member and the second width adjusting screw portion capable of rotating in the forward and reverse directions of the pair of second width adjusting screw members And a pair of second clamp mechanisms having second moving means for connecting the second clamp presser and allowing the second clamp presser to move and second rotating means for enabling the second clamp presser to rotate. The sheet clamping device according to claim 2 or 3. The first moving means can be inserted through a groove formed in the second interlocking member and a spline shaft inserted into and engaged with an attachment member of the first clamp presser, and is disposed along the spline shaft. The sheet clamp device according to claim 4, comprising a frame connected to a nut portion of the first width adjusting screw portion, wherein the first rotating means is connected to the spline shaft. The second moving means can be inserted into a groove formed in the first interlocking member and a spline shaft inserted into and engaged with a mounting member of the second clamp presser and is disposed along the spline shaft. A frame connected to the nut portion of the second width adjusting screw portion, and a linear guide member that is inserted in the groove and arranged on the frame so that the second interlocking member can be moved, 6. The sheet clamping device according to claim 5, wherein the second rotating means is connected to the spline shaft. The first moving means can be inserted through a straight guide member in which a first clamp holding member is disposed and a groove formed in the second interlocking member, and is disposed along the straight guide member. The sheet clamp device according to claim 4, comprising a frame connected to a nut portion of a one-width adjusting screw portion, wherein the first rotating means is connected to the first clamp presser. The second moving means can be inserted into a linear guide member in which a mounting member for a second clamp presser is disposed, and a groove formed in the first interlocking member, and is disposed along the linear guide member. A frame coupled to the nut portion of the two-width adjusting screw portion; and a linear guide member that is inserted in the groove and is movable in the second interlocking member, and is arranged in the frame. 8. A sheet clamping apparatus according to claim 7, wherein means are connected to the second clamp presser.

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