JPH0985702A - Clamping apparatus for timber and the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rapidly and effectively conduct the clamping operation with a simple structure. SOLUTION: A pair or right and left oblique guides 3a, 3b inclined toward a centripetal line are provided, and vice pieces A, B are movably disposed at the guides 3a, 3b. Vertical vice surfaces 5a, 5b are formed at the inner surfaces of the pieces A, B. Upward energizing means E is provided at the mounting base 2 of the pieces A, B. Upward hydraulic cylinder 8 vertically operating is disposed under the line, and its piston rod 8a is coupled to the pieces A, V via horizontal slide means.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamping device such as wood for clamping a workpiece by a vice piece that opens and closes in a centripetal manner. 2. Description of the Related Art When a pillar material, a horizontal bridge material, etc., which is a structural material for wooden construction, is to be mortise-processed by a cutter, the processed material is clamped and fixed in a fixed position in order to improve the machinability or the processing accuracy. 3 and 4 show a conventional clamping device, in which 21a and 21b are a pair of left and right vice pieces 22a,
22b is a passive nut 23 attached to the vise pieces 21a and 21b, a feed screw shaft screwed into the passive nuts 22a and 22b, and 24 is a hydraulic motor for rotationally driving the feed screw shaft 23.
Reference numeral 25 is a holding piece 26 for the work material W arranged above the centripetal line of both vise pieces 21a, 21b. A hydraulic cylinder 27 for moving the holding piece 25 up and down is a conveyer conveyor on which the work material W is placed. When the work material W is clamped and fixed by the above-mentioned clamp device, first, the pair of vise pieces 21a and 21b are lightly actuated to centripally clamp the work material W, and then the holding piece 25 is lowered to work. The material W is securely placed on the mounting surface, and finally the vice pieces 21a and 21b are strongly operated to clamp and fix the processed material W. In performing the mortise processing in this manner, it is necessary to securely fix the processed material W in a state in which the lifting caused by the warpage or the like is eliminated. The conventional clamping device is provided with left and right vise pieces 21a and 21b and an upper and lower pressing piece 25 for clamping and fixing the work material W. As shown in FIG. Therefore, it is inevitable that the structure becomes complicated. Especially, since the upper pressing piece 25 is located in the moving area of the cutter (not shown), it is pointed out that it is an obstacle in processing. Further, since it is necessary to operate the vise pieces 21a and 21b and the pressing piece 25 in good timing, there is a drawback that the time required for clamping becomes redundant. The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a clamping device such as wood which has a simple structure and can perform a clamping operation reliably and promptly. . In order to achieve the above object, the clamp device according to the present invention is configured as follows. That is, the gist is that a pair of left and right tilt guides that tilt toward the centripetal position are provided, and each vice piece is arranged on the tilt guides, and upward biasing means is provided on these vice pieces. Further, an upward hydraulic cylinder that moves up and down is arranged below the centripetal position, and this hydraulic cylinder is connected to the vise piece through horizontal slide means. When the hydraulic cylinder is operated downward, the left and right vise pieces first descend along the inclined guide. Due to this lowering operation, the vertical vise surface is centripetically closed, and the workpiece is clamped. When the hydraulic cylinder is further moved downward while the movement of the vise piece is restrained by the clamp, the vise piece is moved downward against the upward force of the biasing means. By this descending operation, the clamped workpiece is lowered, and the lower surface is placed in contact with the placing surface. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a clamp device for wood or the like according to the present invention will be described below. In FIGS. 1 and 2, 1 is a frame 2 is a mount 3a provided on the upper part of the frame 1 via a biasing means E which will be described later. The inclined guides 3a and 3b are arranged in a V shape in a front view so that the mutual intervals become narrower as they go downward. A and B are a pair of left and right vise pieces that are movable by engaging the outer receiving grooves 4a and 4b with the inclined guides 3a and 3b. The inside surfaces of the vise pieces A and B are vertical vise surfaces. 5a and 5b are provided. Reference numerals 6a and 6b denote horizontal slide bearings provided on the bosses at the lower ends of the vice pieces A and B. Reference numerals 7a and 6b denote guide shafts through which the slide bearings 6a and 6b are inserted. The slide shafts 6a and 6b and the guide shaft 7 form a horizontal slide means. Configure. Reference numeral 8 is a hydraulic cylinder in which a mounting flange 9 is fixed to the upper plate portion of the frame 1 and arranged upward. The upper end of a piston rod 8a of the hydraulic cylinder 8 is fixedly connected to the guide shaft 7. Above piston rod 8a
When the extension operation is performed, the vise pieces A and B move toward the inclined guide 3
When the vise surfaces 5a and 5b rise along a and 3b to open the gap, and when contracting operation is performed, the vise pieces A and B descend along the inclined guides 3a and 3b to close the gap. Next, the urging means E mentioned above will be explained. Reference numeral 10 is a slide guide cylinder provided on the upper plate portion of the frame 1. Reference numeral 11 is a lifting shaft projecting downward on the bottom surface portion of the mounting base 2.
Reference numeral 12 is a contraction spring 13 provided between the guide cylinder 10 and the elevating shaft 11. Reference numeral 13 is an adjusting nut screwed into the tip screw portion 14 of the elevating shaft 11 and abutting on the lower end of the slide guide cylinder 10.
The retractable spring 12 biases the upper constituent members including the mounting base 2 upward. Reference numeral F denotes a conveyer conveyor on which the workpiece W is placed, which is composed of idle rollers and the like as in the conventional example. The structure of the clamp device according to the embodiment is as described above, and the workpiece W is clamped and fixed by the following actions. First, in order to supply the workpiece W to the clamp position, the piston rod 8a of the hydraulic cylinder 8 is extended and the vise pieces A and B are raised to move the vise surface 5 as shown in FIG.
The procedure is performed with the intervals a and 5b opened. When the work material W is supplied to the predetermined position of the conveyor F in this state, the piston rod 8a of the hydraulic cylinder 8 is contracted. Along with this contracting operation, the vise pieces A and B descend along the inclined guides 3a and 3b, and the vise surfaces 5a and 5b.
Obstructively block b. Due to this closing operation, the processed material W
Is clamped. Along with the end of clamp, Vise piece A,
Although the movement of B is restrained, when the operation of the hydraulic cylinder 8 is further continued, the downward pressing force due to the movement is urged by the urging means E.
The vice pieces A and B are moved downward via the mounting base 2 by acting against the urging force of. By this operation, the lower surface of the processed material W is placed in contact with the mounting surface of the conveyor F as shown in FIG. When the workpiece W is placed on the mounting surface, the contraction operation of the piston rod 8a by the hydraulic cylinder 8 is stopped. In the above, when the vise pieces A and B are closed, the slide bearings 6a and 6b slide with respect to the guide shaft 7, so that the respective operations are smoothly performed. The setting of the clamping force and the downward pressing force of the workpiece W by the vise pieces A and B can be appropriately adjusted by the oil supply pressure to the hydraulic cylinder 8. In the above embodiment, the hydraulic cylinder 8 is used to operate the vise pieces A and B, but it is needless to say that the means can be changed to a pneumatic cylinder or a motor-driven feed screw shaft. is there. As described above, according to the clamp device for wood or the like according to the present invention, it is not necessary to install the pressing piece in the upper region of the pair of vise pieces. Therefore, an effect that the configuration can be simplified is exhibited. In addition, since the operation sequence in the opening / closing direction and the up / down direction can be sequentially timed, the clamp operation can be properly and quickly performed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical sectional front view showing the configuration of an embodiment of a clamp device according to the present invention. FIG. 2 is an explanatory diagram of an operating state. FIG. 3 is an explanatory diagram showing a configuration of a conventional clamp device. FIG. 4 is likewise an explanatory view of a conventional clamp device. [Explanation of reference numerals] 2 Mounting base 3a Tilt guide 3b Tilt guide A Vise piece B Vise piece 5a Vise surface 5b Vise surface 6a Slide bearing 6b Slide bearing 7 Guide shaft 8 Hydraulic cylinder 8a Piston rod 12 Compression spring E Biasing means F Transport conveyor (placement surface)

Claims (1)

A clamp device for centrically opening and closing a pair of left and right vise pieces to clamp and fix a workpiece placed on a mounting surface by a vertical vise surface. A pair of inclined left and right tilt guides are provided, each vise piece is arranged on the tilt guide, and upward biasing means is provided on these vise pieces, and an upward hydraulic pressure that moves up and down below the centripetal position. A clamp device for wood or the like, characterized in that a cylinder is provided and the hydraulic cylinder is connected to a vise piece through horizontal slide means.