JPH0872001A - Work clamping device of circular saw machine - Google Patents

Abstract

PURPOSE: To provide a work clamping device which is free from a trouble from a view point of constitution by adhesion and dwell of chips and can be used durably. CONSTITUTION: A pair of right and left work pressing pieces 51, 52 are provided elevatably freely on a press operating frame 4 performing elevating operation by an air pressure cylinder 3. A pinion gear 9 is provided on the press operating frame 4 and the pinion gear 9 is engaged with rack gears 61, 62 provided respectively on the work pressing pieces 51, 52. The work pressing pieces 51, 52 are constituted of a boardlike body and both the work pressing pieces 51, 52 are connected with each other by a partition member 10 comprised of a flexible diaphragm member. A running space (B) of a circular saw (a) is blockaded by both the work pressing pieces 51, 52 and partition member 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work clamp device for a circular saw, which can accurately clamp a work material having irregularities, and more particularly to an improvement thereof.

[0002]

2. Description of the Related Art In a traveling circular saw, etc., it is necessary to strongly clamp and fix a work material to a table surface before processing. The work material is generally flat, and the purpose can be achieved by a simple clamping means, but a special clamping means is required for a special material having an uneven surface, for example. Based on this request, the inventor of the present invention has previously disclosed Japanese Patent Laid-Open No. 5-5
This is a proposal for a work clamp device according to No. 7701.

[0003]

The previously proposed work clamp device is provided with pressing pieces that operate separately on both sides of the protruding position of the circular saw, and these pressing pieces follow unevenness. The clamp operation is performed by abutting on the section. This clamp means is not a problem in operation,
The following problems were pointed out in other parts.

That is, the problem pointed out is that the means of protection against flying chips is not perfect. For example,
The chips that scatter during processing may adhere to the gear mechanism (pinion rack mechanism) that is an internal mechanism, leading to malfunction, and the chips may accumulate and accumulate on the flexible covers on both sides that prevent chips from scattering to the outside. For example, it may be damaged over a long period of time.

The present invention has been made by paying attention to the above-mentioned problems of the prior art. It solves various troubles caused by scattered chips and can be used durable for a circular saw board. It is intended to provide a device.

[0006]

In order to achieve the above object, the work clamp device according to the present invention is constructed as follows. That is, the gist thereof is that the work pressing pieces are each configured by a plate-like body, and a partition member is provided between these work pressing pieces, and the work pressing pieces and the partitioning members make the upper side of the circular running space of the circle. It is in a closed state.

[0007]

In the work clamp device according to the present invention,
Since the circular traveling space is always closed by the partition member, the internal gear means and the like are isolated in another space. Therefore, there is no problem such as attachment of chips to this. Further, since the work pressing piece is formed as a plate-like member and the bending cover is eliminated, chips do not stay and are not damaged.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the work clamp device according to the present invention will be described below. FIG. 1 is a vertical sectional front view of a circular saw equipped with this device. 1 is a horizontal table 2 is a beam-shaped mounting frame 3 arranged above the table 1 corresponding to the table 1 The installed pneumatic cylinder 4 is the piston rod 3 in the pneumatic cylinder 3.
Pressing operation frame attached to a The pressing operation frame 4 moves down when the piston rod 3a extends and moves up when the piston rod 3a contracts.

Reference numeral 51 designates one work pressing piece which is vertically attached to the right vertical side 4a of the pressing operation frame 4 and 52 is the other work pressing piece which is vertically attached to the left vertical side 4b. Pieces 51 and 5
The lower end 2 of each of the lower ends 2 is bent inward to form a horizontal contact surface, and a traveling space B for the circular saw a is formed therein. The work pressing pieces 51 and 52 are formed by plate-shaped bodies.

Rack gears 61 and 62 are provided inside the work pressing pieces 51 and 52 so as to face each other, and a rotary shaft 9 attached to the front and rear vertical sides 4c (only one of which is shown in the figure) of the pressing operation frame 4 rotates. Pinion gear mounted on the shaft 8 This pinion gear 9 meshes with the rack gears 61 and 62 in common on both left and right sides. The above pinion gear 9
Stops at the neutral position due to the weight balance of the work pressing pieces 51, 52.

A partition member 10 is a flexible film member having one end attached to the inside of one work pressing piece 51 and the other end attached to the inside of the other work pressing piece 52 to connect the two.
The traveling space B for the circular saw a is the partition member 10
The upper side is closed by. In addition, the symbol S is the table 1
It is a slit for running the circular saw a provided on the.

The structure of the circular saw board according to one embodiment is as described above, and the work W is clamped and fixed as follows.
Perform cutting processing. First, as shown in FIG. 1, the pneumatic cylinder 3 is operated to set the pressing operation frame 4 to the raised position. Then, in this state, the work W is placed on the table 1.
Supply and set. Here, the edge drop processing of the flat plate material that can obtain the same situation as the uneven material will be described.

When the setting of the work W is completed, the pressing cylinder 4 is lowered by the pneumatic cylinder 3.
Along with this operation, both work pressing pieces 51 and 52 descend,
One of them contacts the upper surface of the work W. The contact causes one work pressing piece 51 to stop operating. When the downward movement of the pressing operation frame 4 continues, the pinion gear 9 rotates counterclockwise due to the meshing relationship with the rack gear 61, and the other rack gear 62 operates downward. The descending operation of the other work pressing piece 52 is such that its abutting surface is the table 1
It stops when it comes into contact with.

In this way, by lowering the pressing operation frame 4 by the pneumatic cylinder 3, both work pressing pieces 51, 5 are
2 can be brought into contact with the upper surface of the work W and the upper surface of the table 1, and can be securely clamped and fixed. At the same time, the traveling slit S can be covered. The flexible film member 10 is deformed as shown in FIG. 2 to hold the traveling space B of the circular saw a in a closed state.

After the work W is clamped and fixed in this way, the circular saw a is projected from the traveling slit S by a jumping mechanism (not shown), and is further moved by the transfer mechanism. As a result, the work W can be subjected to the required edge cutting. The chips generated during processing do not scatter outward from the traveling space B. Incidentally, the chips are discharged by a vacuum means (not shown) connected to the end of the traveling space B.

In the above embodiment, the partition member 10
Although it is constituted by a flexible film member, it may be constituted by a bottom plate 4d integrally provided on the pressing operation frame 4 as shown in FIG. In this case, notches E are provided on both sides of the bottom plate 4d, and one and the other work pressing pieces 51 and 52 are held in the notches E so as to be able to move up and down.

[0017]

As described above, the work clamping device for the circular saw according to the present invention obstructs the traveling space of the circular saw so as to prevent chips from adhering or accumulating on the operating mechanism.
Therefore, it can be used for a long time without causing any trouble.
In addition, there is no need for bent covers on both sides, so there is no risk of damage such as damage.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a circular saw board equipped with a work clamp device according to the present invention.

FIG. 2 is likewise a vertical sectional front view in an operating state.

FIG. 3 is a vertical sectional front view showing another embodiment of the work clamp device according to the present invention.

[Explanation of symbols]

 1 table 3 pneumatic cylinder 4 pressing operation frame 4d bottom plate 51 one work pressing piece 52 the other work pressing piece 61 rack gear 62 rack gear 8 rotating shaft 9 pinion gear 10 partitioning member (flexible film member) a circular saw B running space

Claims (3)

[Claims] 1. A pressing operation frame is provided on the upper side of a table, and a pair of left and right work pressing pieces are provided on the pressing operation frame so as to be movable up and down, and a pinion gear is provided on the pressing operation frame, and the pinion gear is used for the work pressing piece. In a circular saw board that is commonly engaged with rack gears that are respectively fixed to the work pressing pieces, the work pressing pieces are each formed of a plate-like member, and a partition member is provided between the work pressing pieces. A work clamp device for a circular saw, wherein the upper part of the traveling space of the circular saw is closed by the partition member. 2. The work clamp device for a circular saw according to claim 1, wherein the partition member is a flexible film member provided by connecting both work pressing pieces. 3. The work clamp device for a circular saw according to claim 1, wherein the partition member is a bottom plate of the pressing operation frame located between the work pressing pieces.