JPH0354926Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a screen stretching device used when manufacturing a screen plate.

This type of screen gauging device sets a frame on a workbench, applies a predetermined tension to the screen using a gauze jack, and then adhesively fixes the screen to the frame to produce a screen plate. Conventionally, in order to facilitate the work of gluing and fixing the frame and screen together, the screen was pulled while in contact with the frame, or when the screen was pulled with a gauze tensioning jack key, the screen and frame were pulled together. There are some devices in which the screen is pulled with a predetermined tension force so that the screen is not in contact with the screen, and then the frame is moved using multiple hydraulic cylinder devices or air cylinder devices to make contact with the screen. However, when pulling the screen with a gauze stretching jack, the screen was easily damaged and a high quality screen plate could not be obtained. In addition, in the case of the latter, the structure is complicated and expensive, and the frame is forcibly pushed up using multiple hydraulic or air cylinder devices, making it difficult to bring the screen and frame into contact with an even pushing force. However, this has the disadvantage that it adversely affects the adhesion between the screen and the frame.

In view of the above-mentioned conventional drawbacks, the present invention has been developed so that when a screen is pulled with a gauze tensioning jack key, the screen can be pulled without contacting the screen and the frame, and when the screen and the frame are glued together, the screen and frame can be pulled together. To obtain a screen gauging device which is simple in structure and inexpensive and can always be brought into contact with a frame at a constant pressure.

Hereinafter, the present invention will be explained in detail with reference to embodiments shown in the drawings.

In the embodiments of FIGS. 1 to 6, 1 is a workbench. 2, 2, 2, 2 is a jacket key for gauze tension installed on the workbench 1 in a protruding manner;
This gauze tensioning jack key 2 is fixed by welding or the like to a fixed frame 4 having a U-shaped cross section and fixed to the workpiece 1 with a plurality of bolts 3, etc., and to the approximate center of the outer groove 4a of this fixed frame 4. The supporting base 5 is fixed to the fixed frame 4, and the U-shaped mounting bodies 6, 6 are fixed by welding or the like to the approximate center of the inner groove 4b of the fixed frame 4, and pins are attached to the upper and lower wall surfaces of the mounting bodies 6, 6. two pairs of fixed side arms 8 rotatably supported by 7, 7, 7, 7;
8 and two sets of 8, 8, and this fixed side arm 8,
8 and 8, the free end of 8 is pin 9, 9 and 9,
A pair of moving members 10, 10 pivotally supported by 9
and two pairs of movable arms 11, 11 and 11, 11 whose one ends are pivotally supported to the moving members 10, 10 by the pins 9, 9 and 9, 9.
and U-shaped mounting bodies 13, 13 which pivotally support the free ends of the movable arms 11, 11 on the upper and lower wall surfaces by pins 12, 12 and 12, 12, and the fixed frame 4. The mounting body 13 is slidably mounted via a bearing 14 or the like, and the mounting body 13 is mounted on the inner wall surface.
A movable frame 1 to which 13 is fixed by welding or the like.
5, and the moving members 10, 10 and 10, 10
A shaft 20 is formed with right-hand threaded parts 18, 18 and left-hand threaded parts 19, 19 which are threaded into the threaded parts 16, 17 and 16, 17 formed approximately in the center of the It is composed of a forward/reverse rotating motor 21 that can slide within the fixed frame 4.

Reference numeral 22 denotes a toggle clamp having a plurality of clamping portions 25 for a plurality of screens 24 which are fastened to the upper surface of the movable frame 15 with bolts 23 at predetermined intervals. 26 is the early gauze jacket 2, 2, 2,
2 fixed frame 4, 4, 4, 4 support stand 5,
This is a base plate attached to 5, 5, 5. 2
Reference numeral 7 denotes a table that supports a frame body 28 molded from aluminum, which is provided on the base plate 26 so as to be movable up and down. 29 is interposed between the base plate 26 and the table 27, and when the screen 24 is stretched with a predetermined tension by the gauze tensioning jack keys 2, 2, 2, 2, the fluid is The fluid bag is made of a flexible material such as rubber or synthetic resin and is shaped like a tire tube and allows air to flow in to raise the table 27 and bring the frame 28 and screen 24 into contact. Reference numeral 30 denotes a fluid regulating device for supplying and discharging air into the fluid bag 29. As shown in FIG. It consists of a supply pipe 32 and a switching valve 33, such as a three-way switching valve, interposed in this pipe 72.

In the above structure, the air in the fluid bag 29 is discharged to the atmosphere by the switching valve 33, the table 27 is lowered, and the frame 28 is set on the table 27. Thereafter, the four sides of the screen 24 are clamped and fixed to the clamping parts 25 of the toggle clamp 22, respectively. Next, the gauze jack key 2, 2, 2,
2, forward/reverse rotation motor 21, 21, 21, 2
1 in the correct direction. As the shaft 20 rotates in the forward direction due to the forward rotation of the forward and reverse rotation motors 21, 21, 21, 21, the pair of moving members 10,
The motor 21, the shaft 20, and the movable member 1 move in a direction in which the distance between the fixed frame 4 and the movable frame 15 opens.
0, 10 and 10, 10 slide laterally, movable arm 11, 11, 11, 11 and 11, 11, 11, 11, fixed arm 8,
8, 8, 8 and 8, 8, 8, 8 rotate. That is, at the beginning of pulling the screen 24, the angles made by the movable arm and the fixed arm around the mounting bodies 6, 6 and 6, 6 are large as shown in FIG. 3, so the amount of movement of the screen 24 in the pulling direction is Although the speed is large, the angle becomes small as shown in FIG. 5 at the end of the covering, so the amount of movement of the screen 24 in the pulling direction becomes small and the speed becomes slow. Therefore, it is possible to easily set a state in which a predetermined tension is applied to the screen 24.

When the screen 24 is pulled with a predetermined tension in this manner, the fluid regulating device 30 is activated. That is, air is supplied from the compressor 31 into the fluid bag 29 via the pipe 32, and the fluid bag 29
inflate. The table 27 is lifted in response to the swelling of the fluid bag 29, and the frame 28 on the table 27 comes into contact with the screen 24 which is being stretched. At this time, since the table 27 is lifted by the fluid bag 29, the screen 24 and the frame 28 are in contact with each other with uniform pressing pressure. In this state, the screen 24 and the frame body 28 are bonded and fixed with an adhesive or the like. When the screen 24 and the frame 28 are securely fixed with adhesive or the like, the forward/reverse rotation motors 21, 21, 2
1 and 21, the pair of movable members 10 and 10, the movable side arm, and the fixed side arm move in the opposite direction to those described above, and when they return to their original positions, the toggle clamp 22 is removed. You can take out the completed screen version.

Next, different embodiments of the present invention shown in FIGS. 7 to 11 will be explained. In the description of these embodiments, the same parts as those of the embodiments of the present invention are designated by the same reference numerals and redundant explanations will be omitted.

The embodiments shown in FIGS. 7 to 9 are mainly different from the embodiments of the present invention in the fluid bag 29A,
This fluid bag 29A has a plurality of protrusions 34 formed on the tube-shaped upper surface, and by configuring it in this way, the table 27 can be pushed up more evenly.

The embodiment shown in FIG. 10 is mainly different from the embodiment of the present invention in the fluid bag 29B, which is formed in the shape of an air cushion and has a plurality of protrusions 35 formed on its upper surface. Even with this configuration, the same effects as in the embodiment described above can be obtained.

In the embodiment shown in FIG. 11, the main difference from the embodiment of the present invention is a gauze tensioning jack key 2A, and this gauze tensioning jack key 2A has a forward/reverse rotation motor 2.
1, a screw 36 rotated by the forward/reverse rotation motor 21, and a moving body 38 including a screen clamp 37 that reciprocates by the forward/reverse rotation of the screw 36. Similar effects can be obtained by using the jacket for gauze stretching 2A configured in this way.

In the above embodiment, the gauze tensioning jack keys 2 or 2A are arranged in a protruding manner, but the present invention may be arranged in other ways, or the gauze tensioning jack keys 2 are arranged one in the vertical direction and one in the horizontal direction. Alternatively, it may be equipped with 2A. In this case, only the other screen clamp is required.

Moreover, although the description has been given of a device that supplies air to the fluid bags 29, 29A, and 29B, the present invention is not limited to this, and may also be a device that supplies other fluids such as gas or liquid. Furthermore, the fluid bags 29, 29A, and 29B may be placed directly above the workbench 1.

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

(1) The frame can be moved up and down, so
The screen can be prevented from touching the frame when the screen is pulled with a gauze tensioning jack key. Therefore, when applying tension to the screen, it is possible to reliably prevent the screen from coming into contact with the frame and being damaged.

(2) The vertical movement of the frame is performed by putting fluid in and out of a fluid bag made of flexible material placed at the bottom of the table that supports the frame, so the structure is It's easy and cheap.

(3) Since the frame is pushed up by the fluid bag through the table, the contact pressure between the frame and the screen can be made uniform over the entire contact surface. Therefore, the frame and the screen can be securely and evenly fixed with adhesive or the like.

(4) Since it is sufficient to insert a fluid bag at the bottom of the table that supports the frame, the present invention can be easily applied to conventional screen gauging devices, which is economical.

(5) Since the fluid bag can use a tire tube, it can be easily manufactured.

[Brief explanation of the drawing]

Figure 1 is a plan view showing one embodiment of the present invention;
The figure is a partially omitted enlarged sectional view taken along the line A-A in Figure 1, Figure 3 is an explanatory diagram of the jacket key for gauze, and Figure 4 is a diagram similar to Figure 2, showing the fluid bag in a swollen state. , FIG. 5 is an explanatory diagram showing the state of the gauze stretching jack key in the middle of operation, FIG. 6 is an explanatory diagram of the fluid bag and the fluid adjustment device, FIGS. 7 to 9, FIG. 10, and FIG.
FIG. 1 is an explanatory diagram showing different embodiments of the present invention. 1... Workbench, 2, 2A... Jacket key for gauze tensioning, 3... Bolt, 4... Fixed frame, 5...
Support stand, 6... Mounting body, 7... Pin, 8... Fixed side frame, 9... Pin, 10... Moving member, 1
DESCRIPTION OF SYMBOLS 1...Movable side arm, 12...Pin, 13...Mounting body, 14...Bearing, 15...Movable frame, 16...Threaded part, 17...Threaded part, 18...
Right-hand threaded part, 19... Left-hand threaded part, 20... Shaft, 21
...Forward/reverse rotation motor, 22...Toggle clamp, 23...Bolt, 24...Screen, 25
...Holding portion, 26...Base plate, 27...Table, 28...Frame, 29, 29A, 29B...Fluid bag, 30...Fluid adjustment device, 31...Compressor, 32...Pipe, 33...Switching valve, 34
... protrusion, 35 ... protrusion, 36 ... screw, 37 ... screen clamp, 38 ... moving body.

Claims (1)

[Claims for Utility Model Registration] 1. In a screen gauze tensioning device that is equipped with a gauze tensioning jack on a workbench that can apply a predetermined tension to the screen,
A table supporting a frame that is movable downwardly is interposed between the table and the workbench, and when the screen is tensioned to a predetermined tension by the gauze tensioning jack key, fluid flows in. It consists of a fluid bag made of a flexible material that can raise the table and bring the frame and screen into contact, and a fluid adjustment device that supplies and discharges fluid into the fluid bag. Features of screen gauging equipment. 2. The screen gauging device according to claim 1, wherein the fluid bag is a tube shaped like a tire tube into which air is introduced. 3. The screen gauze stretching device according to claim 1, wherein the fluid bag is formed in the shape of an air cushion into which air flows. 4. The screen gauze according to any one of claims 1 to 3 of the claims registered as a utility model, characterized in that the fluid bag has a plurality of protrusions formed on the upper surface of the fluid bag to support a table. tension device.