JP4925565B2 - Screen tensioning device - Google Patents

Description

  The present invention relates to a screen tensioning device used for manufacturing a rectangular screen plate.

  A conventional screen tensioning device is configured to clamp a front, back, left, and right of the screen with front and rear, left and right clamping devices and apply a predetermined tension to the clamped screen.

For this reason, the screen is pulled in the front / rear / left / right direction with the front / rear / left / right clamped state of the screen. Since the tensile force does not act, there is a drawback that distortion occurs in the portions near the four corners of the screen fixed to the frame.
Reality 5-17240

  In view of the above-mentioned conventional drawbacks, the present invention enables the screen to be uniformly applied with a predetermined tension in the left-right direction, and effectively prevents distortion on the screen near the four corners. An object of the present invention is to provide a screen tensioning device capable of producing a screen plate capable of precision screen printing.

The above and other objects and novel features of the present invention will become more fully apparent when the following description is read in conjunction with the accompanying drawings.
However, the drawings are for explanation only and do not limit the technical scope of the present invention.

In order to achieve the above-mentioned object, the present invention clamps the front / rear / left / right of the screen with a front / rear / right / left clamping device and applies a predetermined tension to the clamped screen in the front / rear direction. In a screen tensioning device that can be fixed to the body, when the screen is clamped by the front and rear clamping devices, both ends of the screen in the vicinity of the front and rear clamping devices are clamped in the horizontal direction. A screen tensioning device is composed of the front and rear auxiliary clamp devices provided at positions near both ends of the front and rear clamping devices that can only apply a predetermined tension.

  As is clear from the above description, the present invention has the following effects.

(1) A screen that can be fixed to a rectangular frame disposed in the front-rear direction by clamping the front-rear, left-right, and right-and-left of the screen with a front-rear-left-right clamping device and applying a predetermined tension to the clamped screen. When the screen is clamped by the front / rear clamping device, the both ends of the screen in the vicinity of the front / rear clamping device are clamped to give a predetermined writing force only in the left / right direction. Since the front and rear auxiliary clamp devices that can be mounted are provided at positions near both ends of the front and rear clamp devices, the front and rear portions of the screen clamped by the front and rear clamp devices are given predetermined tension in the left and right direction. It can be clamped in the state.
Therefore, even when a tensile force in the front / rear / right / left direction is applied to the screen, it is possible to efficiently prevent distortion from occurring in the portions near the four corners.

(2) According to the above (1), the front, rear, left and right parts can be clamped with a predetermined tension applied to the screen.
Therefore, a uniform tensile force can be applied to the screen, and the whole can be fixed to the frame body in a uniform state.

(3) According to the above (1), it is only necessary to provide the auxiliary clamping device at the front and rear portions, so that it can be easily manufactured and the present invention can be applied to an existing screen tensioning device.

(4) In claim 2, the same effects as in the above (1) to (3) can be obtained.

  Hereinafter, the present invention will be described in detail from the best mode for carrying out the present invention shown in the drawings.

  In the first preferred embodiment for carrying out the present invention shown in FIGS. 1 to 17, reference numeral 1 denotes a screen tensioning apparatus according to the present invention. The screen tensioning apparatus 1 includes a rectangular base body 2 and a base. The front and rear clamping devices 4 and 5 that can clamp the front and rear portions of the screen 3 that slides in the front and rear direction on the front and rear portions of the body 2, and the screen 3 that slides and moves left and right on the left and right portions of the base body 2. Both end portions of the screen 3 clamped by the front and rear clamping devices 4 and 5 at positions near the left and right clamping devices 6 and 7 and the front and rear clamping devices 4 and 5. Auxiliary clamping devices 8, 8, 9, 9 at the front and rear portions that can apply a predetermined tension in the left-right direction, and a roll-shaped screw attached to the rear end portion of the base body 2. A rectangular frame attached to the upper surface of the base body 2 covered with a screen support 10 for supporting the lean 3, the front and rear clamping devices 4 and 5, and the left and right clamping devices 6 and 7. And a support plate 12 that supports the substrate 11 in the front-rear direction.

  The front and rear clamping devices 4 and 5 are provided on the upper surfaces of the front and rear portions of the base body 2 at the front and rear hydraulic cylinders 14 and 14 where the operating rods 13 and 13 operate in the front and rear direction. 14 moving rods 15 and 15 fixed to the front ends of the operating rods 13 and 13, and the moving bodies 15 and 15 in the front and rear directions are horizontally disposed at both ends of the hydraulic cylinders 14 and 14 of the front and rear portions. Guide tubes 16, 16, 16, 16 fixed to the base body 2, which are guided to slide and move, and the movable bodies 15, 15 in the front-rear direction guided by the guide tubes 16, 16, 16, 16 A fixed side in which mountain-shaped concave portions 19, 19 are formed on the upper surface fixed to the guide members 18, 18 composed of the fixed guide shafts 17, 17, 17, 17 and the movable bodies 15, 15 in the front-rear direction. The Both ends of the lean sandwiching pieces 20 and 20 and the moving bodies 15 and 15 in the front-rear direction are fixed at both ends or near the both ends, and the support body located on the fixed-side screen sandwiching pieces 20 and 20. 21, 21, a plurality of screen clamping piece operating hydraulic cylinders 23, 23 in which operating rods 22 attached to the supports 21, 21 respectively at predetermined intervals move downward, and the plurality of screen clamping Crest-shaped protrusions 24 that engage with the crest-shaped recesses 19, 19 of the fixed-side screen clamping pieces 20, 20, which are fixed to the front end portions of the operating rods 22, 22 of the hydraulic cylinders 23, 23 for one-operation. The movable-side screen sandwiching pieces 25 and 25 formed with 24 are formed.

  The left and right clamping devices 6 and 7 include left and right hydraulic cylinders 27 and 27 on which the operating rods 26 and 26 operate in the left and right directions on the upper surfaces of the left and right parts of the base body 2, and the left and right hydraulic cylinders 27, 27, the recesses 28, 28, 28, so that both ends fixed to the front ends of the operating rods 26, 26 can be positioned below the movable bodies 15, 15 in the front-rear direction of the front-rear clamp devices 4, 5. The left and right moving bodies 29 and 29 formed with 28 and the left and right hydraulic cylinders 27 and 27 are guided to slide in the horizontal direction at both ends of the left and right hydraulic cylinders 27 and 27, respectively. Guide cylinders 30, 30, 30, 30 fixed to the base body 2, guide shafts 31, 31 fixed to the left and right movable bodies 29, 29 guided by the guide cylinders 30, 30, 30, 30 31 A guide member 32, 32 composed of 31; a fixed-side screen sandwiching piece 34, 34 in which mountain-shaped recesses 33, 33 are formed on the upper surface fixed to the left and right moving bodies 29, 29; Support bodies 35, 35 positioned on the fixed-side screen sandwiching pieces 34, 34 fixed to both ends excluding the recesses 28, 28, 28, 28 of the directional moving bodies 29, 29, and the support bodies 35 35, a plurality of screen sandwiching piece actuating hydraulic cylinders 37, 37 in which operating rods 36 attached at predetermined intervals respectively move downward, and a plurality of screen sandwiching piece actuating hydraulic cylinders 37, 37. The movable side screen clamp formed with mountain-shaped projections 38, 38 that engage with the mountain-shaped recesses 33, 33 of the fixed-side screen clamping pieces 34, 34, fixed to the distal ends of the operating rods 36, 36. Pieces 39, 39, a fixed-side screen clamping piece 34A to be attached when a large screen plate is formed in the recesses 28, 28, 28, 28 of the laterally movable bodies 29, 29, and a movable-side screen clamping It is comprised with the additional clamp apparatus 40, 40, 40, 40 provided with the piece 39A.

  The front and rear auxiliary clamping devices 8, 8, 9, and 9 are provided with operating rods 41, 41, 41, 41 in the left-right direction at positions near both ends of the support bodies 21, 21 of the front and rear clamping devices 4, 5. The auxiliary clamp hydraulic cylinders 42, 42, 42, 42, and the front and rear parts of the screen 3 attached to the operating rods 41, 41, 41, 41 of the auxiliary clamp hydraulic cylinders 42, 42, 42, 42 U-shaped support tools 44, 44, 44, 44 in which the lower pieces that clamp and fix the both end portions become fixed-side clamping pieces 43, 43, 43, 43, and the support tools 44, 44, 44, 44 The movable side sandwiching piece 46 is attached to the distal end portion of the operating rods 45, 45, 45, 45 for pressing the fixed side sandwiching pieces 43, 43, 43, 43 attached to the upper pieces 44a, 44a, 44a, 44a. 46, 46, 46 are attached It was is composed of a narrow wear hydraulic cylinder 47,47,47,47.

  The screen tensioning device 1 having the above structure supports the frame 11 on the support plate 12, and pulls out the screen 3 supported by the screen support base 10 to a place where it can be clamped by the front clamping device 4, and the front clamping device. 4 where both ends of the screen 3 near the tip are sandwiched by the auxiliary clamp devices 8 and 8 at the front of the left and right parts, and the auxiliary clamp hydraulic cylinders 42 and 42 are operated to apply a predetermined tension. Then, the plurality of screen clamping piece actuating hydraulic cylinders 23 of the front clamping device 4 are operated, and the movable screen clamping piece 25 is pressed and fixed to the fixed screen clamping piece 20.

Next, the both ends of the screen 3 positioned at the rear auxiliary clamp devices 9 and 9 of the left and right portions of the rear clamp device 5 are connected to the screen 3 between the front portion and the rear portion.
When the auxiliary clamp hydraulic cylinders 42 and 42 are actuated and a predetermined tension is applied, a plurality of screen clamping piece actuating hydraulic cylinders of the rear clamping device 5 are clamped so as not to cause distortion. 23 is operated, and the movable screen clamping piece 25 is pressed and fixed to the fixed screen clamping piece 20.

  Next, a plurality of screen clamping pieces of the left and right clamp devices 6 and 7 are applied in a state where the clamp devices 4 and 5 at the front and rear portions are operated to apply a preset tension in the front and rear direction of the screen 3. The hydraulic cylinders 37 and 37 for operation are operated and the movable side screen clamping pieces 39 and 39 are pressed and fixed to the fixed side screen clamping pieces 34 and 34 to be clamped and fixed.

  From this state, the front and rear hydraulic cylinders 14 and 14 of the front and rear clamping devices 4 and 5 are operated, and the left and right hydraulic devices 27 and 27 of the left and right clamping devices 6 and 7 are operated. The screen 3 is clamped and fixed to the frame 11 while maintaining a state in which a predetermined tension is applied in the front-rear and left-right directions.

Since the screen 3 fixed to the frame 11 in this way is clamped in a state in which the portions clamped by the clamping devices 4 and 5 at the front and rear portions of the screen 3 are given a predetermined tension in the left-right direction, When a predetermined tension is applied to the front and rear clamping devices 4 and 5 and the left and right clamping devices 6 and 7, as shown in FIG. The screen 3 can be fixed to the frame 11.
[Different forms for carrying out the invention]

  Next, different modes for carrying out the present invention shown in FIGS. 18 to 20 will be described. In the description of the different modes for carrying out the present invention, the same components as those in the best mode for carrying out the present invention are denoted by the same reference numerals, and redundant description is omitted. .

  The second embodiment for carrying out the present invention shown in FIGS. 18 to 20 is mainly different from the best first embodiment for carrying out the present invention in that the clamping devices 6 and 7 on the left and right sides are different. The point which provided the auxiliary | assistant clamp apparatus 8A and 9A of the left-right part of the same structure as the said auxiliary | assistant clamp apparatus which can clamp the both ends of the screen 3 of the vicinity position, and can provide predetermined | prescribed tension | tensile_strength in the front-back direction. Thus, even with the screen tensioning apparatus 1A configured as described above, the same operational effects as those of the best first embodiment for carrying out the present invention can be obtained.

  The present invention is utilized in the industry of manufacturing screen tensioning devices.

The top view of the best 1st form for implementing this invention. 1 is a front view of the best first embodiment for carrying out the present invention. The side view of the best 1st form for implementing this invention. Sectional drawing which follows a 4-4 line of FIG. The top view for explanatory drawing of the clamp apparatus of the front-back part. The front view for explanatory drawing of the clamp apparatus of the front-back part. Sectional drawing which follows the 7-7 line | wire of FIG. The top view for explanatory drawing of the clamp apparatus of a right-and-left part. The front view for explanatory drawing of the clamp apparatus of a right-and-left part. Sectional drawing which follows the 10-10 line of FIG. Explanatory drawing of the auxiliary | assistant clamp apparatus of the front-back part. Operation | movement explanatory drawing of the auxiliary clamp apparatus of a front part. Operation | movement explanatory drawing of the clamp apparatus of a front part. Operation | movement explanatory drawing of the auxiliary clamp apparatus of a rear part. Operation | movement explanatory drawing of a clamp device of a rear part. Operation | movement explanatory drawing which provided tension | tensile_strength in the front-back direction. Operation | movement explanatory drawing of the clamp apparatus of a right-and-left part. The top view of the 2nd form for carrying out the present invention. The front view of the 2nd form for carrying out the present invention. The side view of the 2nd form for carrying out the present invention.

1, 1A: screen tensioning device,
2: Base body, 3: Screen,
4: Front clamping device, 5: Rear clamping device,
6: Clamping device on the left side, 7: Clamping device on the right side,
8, 8A: front auxiliary clamping device,
9, 9A: Rear auxiliary clamp device,
10: screen support, 11: frame
12: support plate, 13: working rod,
14: hydraulic cylinders at the front and rear, 15: moving body,
16: Guide cylinder, 17: Guide shaft,
18: Guide member, 19: Recess,
20: Fixed-side screen clamping piece, 21: Support,
22: Working rod
23: Hydraulic cylinder for screen clamping piece operation,
24: protrusion, 25: movable screen clamping piece,
26: Working rod, 27: Hydraulic cylinders on the left and right sides,
28: recessed portion, 29: moving body,
30: Guide cylinder, 31: Guide shaft,
32: Guide member, 33: Recess,
34, 34A: fixed-side screen clamping pieces,
35: support, 36: working rod,
37: Hydraulic cylinder for screen clamping piece operation,
38: protrusion,
39, 39A: movable-side screen sandwiching piece,
40: additional clamping device, 41: operating rod,
42: Hydraulic cylinder for auxiliary clamp,
43: Fixed side clamping piece, 44: Support tool,
45: Working rod 46: Movable side clamping piece,
47: A hydraulic cylinder for pinching.

Claims (2)

A screen tensioning device that clamps the front and rear and right and left of the screen with front and rear and left and right clamping devices, and fixes the clamped screen to a rectangular frame disposed in the front and rear direction while applying a predetermined tension. Therefore, when the screen is clamped by the front and rear clamping device, both ends of the screen in the vicinity of the front and rear clamping device can be clamped to apply a predetermined tension only in the left and right direction. A screen tensioning device, wherein the auxiliary clamping device for the portion is provided at a portion near both ends of the front and rear clamping device. A screen tensioning device that clamps the front and rear and right and left of the screen with front and rear and left and right clamping devices, and fixes the clamped screen to a rectangular frame disposed in the front and rear direction while applying a predetermined tension. Therefore, when the screen is clamped by the left and right clamping devices, the right and left can be applied only in the front-rear direction by clamping both ends of the screen in the vicinity of the left and right clamping devices. A screen tensioning device, wherein auxiliary clamp devices for the left and right sides are provided at positions near both ends of the left and right side clamp devices.

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