JPH0886302A - Clamping device for TV frame cutting - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a clamping device for cutting a TV frame, which does not use a wedge and therefore reliably releases the clamp claw and improves the cutting finishing accuracy. A clamping device for cutting a television frame has a plurality of clamping devices which are arranged on a base plate along two lateral frames of the television frame and clamp the lateral frames. Each of the clamp devices includes a pair of clamp pawls pivotally attached to the base plate so as to clamp the horizontal frame of the television frame therebetween, and a clamp pawl brought into a predetermined position by the first cylinder. Clamping means for clamping in position, a first cylinder acting on the lower surface of the clamping pawl to pivot one clamping pawl, and a second cylinder acting on the lower surface of the clamping pawl to pivot the other clamping pawl. And a cylinder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television frame cutting clamping device, and more particularly to a device for clamping a television frame when cutting an upper chagril welding surface (R surface).

[0002]

FIG. 1 shows a television frame and an NC cutter.
Is shown in the schematic diagram of FIG. The television frame 10 has two horizontal frames 12 and two vertical frames 18. The horizontal frame 12 has an L-shaped cross section, and includes a horizontal frame vertical portion 14 and a horizontal frame horizontal portion 16 in the drawing. The upper surface (R surface) 14a of the vertical portion of the horizontal frame is cut by the NC cutter 20. The portion of the television frame clamped by the clamping device of the present invention is the vertical portion of the horizontal frame. Note that, for convenience of description below, the direction with respect to the television frame is determined as follows. X direction: A direction along the horizontal frame portion Y direction: A direction along the vertical frame portion Z direction: A direction perpendicular to both the X direction and the Y direction

Conventionally, various types of clamping devices for cutting TV frames have been proposed.
Among these, a device which has a high clamping force, has a small deformation of the TV frame at the time of clamping, and can perform cutting processing with high accuracy is proposed by the present applicant in Japanese Patent Application No. 63-132657.
Proposed in the issue.

The clamping device of Japanese Patent Application No. 63-132657 is equipped with a large number of clamping devices and a pair of clamping and positioning devices. The pair of clamp and positioning device positions the TV frame at the reference position and
Used to clamp a television frame.
A large number of clamp devices are used to reliably clamp the TV frame with a high clamping force after positioning the TV frame with the clamp / positioning device. The clamp device and the clamp / positioning device include a pair of clamp claws for clamping both sides of the vertical portion of the horizontal frame of the television frame. The outer surface of one (outer) clamp claw (movable receiving claw) of the clamp device is formed with an inclined surface so as to perform a wedge action, and a wedge having an inclined surface corresponding to the inclined surface and operated by a cylinder is formed. It is provided.

When the wedge is actuated along the vertical surface of the base plate, the wedge rises along the vertical surface of the base plate, acting on the inclined surface of the clamp pawl to move the clamp pawl about the clamp pin. Pivot and externally abut the vertical portion of the horizontal frame of the television frame that is prepositioned by the clamp and positioner. The other clamping pawl is then actuated to exert a high clamping force inside the vertical part of the television frame, whereby the television frame is clamped with a high clamping force. The clamping force during this clamping is received by the vertical surface of the base plate via the outer clamping pawls and wedges.

[0006]

However, in this conventional clamping device, since a wedge is used, an inclined surface must be formed on the wedge and one of the clamp claws by the wedge, and the wedge action is also required. Since it is used, sometimes the wedge and the clamp claw are firmly connected to each other, and when the clamp is released, the clamp cannot be lowered. Further, in the conventional clamping device, the variation in the finish accuracy of the cutting work is about 0.1 to 0.2 mm, but the clamping precision is improved so that the higher finish accuracy of the cutting work is required. Has become.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a television frame cutting clamping device which does not use a wedge and therefore can reliably unclamp the clamping claws and improve the cutting finishing accuracy.

[0008]

In order to achieve the above-mentioned object, the present invention provides a clamping device for a television frame cutting process, wherein the transverse frame is arranged on a base plate along two transverse frames of the television frame. A plurality of clamping devices for clamping, each of the clamping devices being a pair of clamping pawls pivotally attached to the base plate so as to clamp the transverse frame of the television frame therebetween, and one clamping pawl. A first cylinder acting on the underside of the clamp pawl to pivot the clamp pawl, a clamping means for clamping the clamp pawl brought into a predetermined position by the first cylinder to said position, and the other clamp pawl And a second cylinder that acts on the lower surface of the clamp claw so that It is to employ a clamping device.

[0009]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 2 is a side view of a clamp device incorporated in a television frame cutting clamping device of the present invention (hereinafter, simply referred to as a clamping device). FIG.
FIG. 4 is a side view of a positioning / clamping device incorporated in a clamping device. FIG. 4 is a plan view of the clamping device. FIG. 5 is a side view of the clamping device.

First, a clamping device incorporated in the clamping device of the present invention will be described with reference to FIG. The clamp device 24 includes a pair of clamp claws 26 and 28 (movable receiving claws 26 and pressing claws 28) that clamp the TV frame 10 (specifically, both sides 14b and 14c of the vertical portion of the horizontal frame) between them. And has the configuration and operation described below. A large number of clamp devices 24 (and a pair of clamp / positioning devices 46 described later) are fixed to the base plate 22,
The base plate 22 is the upper base plate portion 2
2a, a lower base plate portion 22b, and an upright base plate portion 22c for connecting both of them. The lower base plate 22b is provided with a plurality of hydraulic cylinder support bases 37 having an L-shaped cross section for supporting the hydraulic cylinders 38 for exerting a clamping force on the push claws 28, in accordance with the position where the horizontal frame of the television frame is to be fixed. It is fixed.

The pneumatic cylinder 32 is fixed to the upper surface of the horizontal portion of the hydraulic cylinder support base 37. The pneumatic cylinder 32 has an actuator rod 32a arranged upright so as to abut the lower surface of the movable receiving pawl 26, and has two high pressure air ports 32e, 32e for operating the actuator rod 32a. There is. The actuator rod 32a is configured to be fastened and fixed at a predetermined position by high hydraulic pressure.

The structure will be described below. The clamping sleeve housing 3 is attached to the upper base plate 22a.
2b is fixed, and a clamping sleeve 32c is arranged inside thereof. The clamping sleeve 32c surrounds the above-mentioned actuator rod 32a, and oil introduced from a high hydraulic pressure port 32d provided in the clamping sleeve housing 32b acts on the outer surface of the clamping sleeve 32c. There is.
When the high hydraulic pressure acts on the outer surface of the clamping sleeve 32c, a high clamping force acts on the actuator rod 32a, and the actuator rod 32a is held at that position with a high clamping force.

The pair of clamp claws (movable receiving claw 26 and pressing claw 28) described above are provided on a clamp claw seat 41 fixed to the upper surface of the upper base plate 22a. A clamp pin 40 is horizontally provided on the clamp claw seat 41, a pair of clamp claws 26 and 28 are pivotally attached about the clamp pin, and the spring 42 is in the unclamped state. These claws are usually provided to open. The tip (upper end) of the actuator rod 38a of the hydraulic cylinder 38 is the lower surface 28 of the push claw 28.
It comes into contact with a.

Next, the operation of the clamp device will be described. After the horizontal frame of the television frame is positioned in the Y direction by the clamp / positioning device and the Y-direction positioning device, which will be described later, when the pneumatic cylinder 32 operates, The movable receiving claw 2 in which the actuator rod 32a moves upward and the actuator rod 32 and the lower surface are in contact with each other
6 pivots inward (clockwise in the drawing) about the clamp pin 40 and comes into contact with the outer surface 14c of the vertical portion of the horizontal frame of the television frame 10. At this time,
The pressure of the pneumatic cylinder is set so that the horizontal frame is not distorted by the pressing of the movable receiving claw. That is, each movable catch is lightly contacted with the vertical part of the horizontal frame of the TV frame so that the movable catch can maintain the original shape (without bending) of the vertical part of the horizontal frame of the TV frame before the clamp. Is something to do.

Next, high hydraulic pressure is applied to the clamp sleeve 32c to hold the actuator rod 32a at its abutting position with a high clamping force (for example, the holding force in this case is
It can withstand a load of about 1000 Kg). Next, the hydraulic cylinder 38 is operated to raise the actuator rod 38a, and the push claw 28 is pivoted inward (counterclockwise in the drawing) about the clamp pin 40, and the TV frame is pushed by the push claw 28. It is pressed against the horizontal frame with a high clamping force. As a result, the horizontal frame 14
Is clamped with a high clamping force by a pair of clamping pawls. At this time, from the hydraulic cylinder 38 to the push claw 28,
The high clamping force applied to the movable receiving pawl 26 via the TV frame 10 is received by the actuator rod 32a of the pneumatic cylinder 32, but as described above, the actuator rod 32a is held by the clamping sleeve 32c with a high clamping force. As a result, the actuator rod does not move and therefore the TV frame is clamped with a high clamping force while maintaining the original shape.

Next, referring to FIG. 3, a clamping and positioning device 4 incorporated in the clamping device of the present invention.
6 will be described. As described later with reference to FIG. 4, two clamp / positioning devices 46 are arranged with respect to one horizontal side vertical portion of the television frame 10 (reference side). The clamp / positioning device 46 is configured to be used for both positioning of the TV frame and clamping of the TV frame. FIG.
2, the clamp / positioning device 46 uses the clamp claw 48 except that the movable claw 26 and the pneumatic cylinder 32 for moving the movable claw shown in FIG. 2 are used instead of the fixed claw 48. It has almost the same configuration as the device 24. The lower surface of the fixed claw 48 is in contact with the upper surface of the clamp claw seat 41 fixed to the upper surface of the upper base plate 22a. A hydraulic cylinder 38 that raises the push claw 28 is fixed to a hydraulic cylinder support 39.

Next, the operation of the clamp / positioning device 46 will be described. The clamp / positioning device is fixed to a predetermined position of the base plate. Therefore, the tip end 48a of the fixed claw 48 (the contact portion with the TV frame)
Are in place. As will be described later, after the TV frame is pressed against the fixed claw 48 by the Y direction positioning devices 54 and 56 to position the horizontal frame of the TV frame, the high hydraulic cylinder 38 is operated and the actuator rod 38a is raised. , Push claw 28
Is pivoted inward (counterclockwise in the drawing) about the clamp pin 40, and is pressed with a high clamping force against the horizontal frame of the television frame by the pressing claw 28. As a result, the horizontal frame 14 is clamped by the pair of clamp claws with a high clamping force. At this time, a high clamping force is applied to the fixing claw 48 from the hydraulic cylinder 38 via the pressing claw 28 and the TV frame 10, but the fixing claw itself receives the clamping force by the clamping claw seat 41. The frame will be clamped with high clamping force while maintaining the original shape.

As described above, in this clamp / positioning device, since the fixed claw 48 is positioned by abutting against the base plate (specifically, the clamp claw seat), it is used as a reference for positioning the television frame. It can be used and also can be used for clamping because it has the pressing claw 28. Note that the positioning is performed in cooperation with a Y-direction positioning device that movably arranges the TV frame toward the fixed claw 48, as described later.

Next, with reference to FIGS. 4 and 5, the structure of the entire clamping device of the present invention will be described. A plurality of clamp devices 24 are attached to the base plate 22 at positions corresponding to the two horizontal frames of the television frame to be placed so as to extend along the respective horizontal frames. , The upper horizontal frame), and two clamp / positioning devices 46 are attached to both ends of the horizontal frame.

The X-direction positioning devices 50 and 52 (the pneumatic cylinder 50 and the left and right distribution pawls 5 which are operated in the X-direction by the pneumatic cylinders) are located substantially in the center of the base plate 22.
2) and Y-direction positioning devices 54 and 56 (pneumatic cylinder 54 and spring-pressing rod 56 that is actuated in the Y-direction by pneumatic cylinder 54) are attached. Further, the support rods 58 of the TV frame are arranged on the base plate 22 so as to support the horizontal frame of the TV frame at four points, that is, to position the TV frame in the Z direction.

The clamping device normally has a Z-direction clamping device in addition to the above-mentioned structure, but since these clamping devices do not form an essential part of the present invention, the description thereof will be omitted.

Next, the operation of the clamping device will be described. First, the TV frame is placed on the support rod 58 and positioned in the Z direction. At this time,
The movable receiving claw 26 that moves inward by the pneumatic cylinder 32 and the pressing claw 28 that moves outward by the hydraulic cylinder 38 are in the initial positions retracted by the springs 42, respectively, and are placed on the TV frame. Does not get in the way.

Next, two clamp / positioning devices 46 and Y-direction positioning devices 54 and 56 are used for positioning at a fixed point in the Y-direction, and the X-direction positioning device 5 is used.
0 and 52 are used to position the television frame 10 in the X and Y directions. Specifically, first, the push type load 56 pushes the lateral frame of the TV frame in the Y direction by the operation of the pneumatic cylinder 54 of the Y direction positioning device, and the TV frame 10 is fixed to the fixing claw 48 of the clamp / positioning device. The horizontal frame 14 is positioned in the Y direction, and the operation of the pneumatic cylinder 54 is released. next,
By operating the pneumatic cylinder 50 of the X-direction positioning device,
The two distribution claws 52 push the left and right vertical frames 18 of the television frame 10 from the inside to the outside to distribute the left and right equal frames in the X direction to perform positioning in the X direction and release the operation of the pneumatic cylinder 50. Again, the pneumatic cylinder 54 of the Y direction positioning device is actuated to perform positioning in the Y direction more accurately, the pneumatic cylinder 54 is deactivated, and the pneumatic cylinder 50 of the X direction positioning device is actuated. Then, the positioning in the X direction is performed more accurately, and the operation of the pneumatic cylinder 50 is released.

Next, the operation of the pneumatic cylinder 54 of the Y-direction positioning device is activated three times to activate the television frame 10.
The operation of the pneumatic cylinder 54 is stopped while the horizontal frame 14 is pressed against the tip 48a (reference point) of the fixed claw of the clamp / positioning device 46. Next, three times, the pneumatic cylinder 50 of the X-direction positioning device is operated to stop the operation of the pneumatic cylinder with the vertical frames 18 of the television frame distributed at equal left and right intervals. in this way,
By repeating the positioning in both the X and Y directions alternately, it is possible to surely perform the positioning at the desired accurate position.

Next, the pneumatic cylinder 32 of the clamp device 24 on the counter-reference side is actuated so that the movable receiving pawl 26 is brought into light contact with the lateral frame 14 of the television frame 10, and a high hydraulic pressure is applied to the clamp sleeve 32c. The movable receiving claw 26 is fixed with a high clamping force. Next, the pneumatic cylinder 32 of the clamp device 24 on the reference side is operated to bring the movable receiving claw 26 into light contact with the horizontal frame 14 of the television frame 10,
High hydraulic pressure is applied to the clamp sleeve 32c to move the movable receiving pawl 26.
Is fixed with a high clamping force. Finally, the hydraulic cylinders 38 of all the clamp devices and the clamp / positioning devices on the reference side and the anti-reference side are operated, and the pressing claws 28 are pressed against the horizontal frame 14 of the television frame with a high clamping force, so that the entire television frame is obtained. To clamp.

As described above, the television frame has been clamped by the clamping device, and thereafter the television frame is cut by using the NC cutter 20 to release the clamping for the television frame. The television frame is removed from the clamping device and one cycle is complete.

[0028]

As described in detail above, according to the present invention, there is provided a television frame cutting clamping device which does not use wedges and therefore can reliably unclamp the clamping claws and improve the cutting finishing accuracy. can get.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a television frame and an NC cutter.

FIG. 2 is a side view of a clamp device incorporated in the television frame cutting clamping device of the present invention.

FIG. 3 is a side view of a positioning / clamping device incorporated in a clamping device.

FIG. 4 is a plan view of a clamping device.

FIG. 5 is a side view of the clamping device.

[Explanation of symbols]

 10 TV Frame 14 Horizontal Frame of TV Frame 18 Vertical Frame of TV Frame 22 Base Plate 24 Clamping Device 26 Movable Receiving Claw 28 Pushing Claw 32 Pneumatic Cylinder 38 Hydraulic Cylinder 32c Clamping Sleeve 46 Clamping and Positioning Device 48 Fixing Claw 54, 56 Y Directional positioning device 50, 52 X-direction positioning device

Claims (5)

[Claims] 1. A clamping device for cutting a television frame, comprising a plurality of clamping devices arranged on a base plate along two lateral frames of the television frame to clamp the lateral frames, each of the clamping devices comprising: A pair of clamp claws pivotally attached to the base plate so as to clamp the horizontal frame of the television frame therebetween, and a first cylinder that acts on the lower surface of the clamp claws to pivot one clamp claw. A clamping means for clamping the clamp claw brought to a predetermined position by the first cylinder at the position, and a second cylinder acting on the lower surface of the clamp claw so as to pivot the other clamp claw. Clamping device for TV frame cutting, which is characterized. 2. The television frame cutting clamping device according to claim 1, wherein the clamping means is a clamping sleeve arranged around an actuator rod of the first cylinder, and an outer circumference of the clamping sleeve. A clamping device for cutting a TV frame, comprising a hydraulic pressure applying means for applying a hydraulic pressure to the. 3. The clamping device for cutting a TV frame according to claim 1, wherein the other clamp claw is pivoted about the same clamp pin as the one clamp claw, and the one clamp claw and the other clamp claw. A clamping device for cutting a TV frame, characterized in that a spring is arranged between the clamp claws and presses both clamp claws in a direction to open them. 4. The TV frame cutting clamping device according to claim 1, further comprising a positioning / clamping device for positioning and clamping one lateral frame of the TV frame, wherein the positioning / clamping device is a base plate. The one clamp claw positioned with respect to the other, and the other clamp claw pivotally attached to the one clamp claw so as to clamp the horizontal frame of the TV frame therebetween. Clan for cutting a television frame, further comprising a rod movably actuating the television frame toward the one clamping claw so as to position the lateral frame of the one lateral claw with respect to the one clamping claw. Ping device. 5. The television frame cutting clamping device according to claim 1, further comprising positioning means for positioning a vertical frame of the television frame.