JPH0324605Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a clamping tool for suspending a metal material such as an aluminum profile from a transport frame during surface treatment of the material.

(Prior Art) Conventionally, this type of clamping tool includes a clamping rod fixed to a support frame, and a clamping rod that is swingably supported by the support frame and always supported by a spring in order to clamp the material between the clamping rods. It has a clamping claw that springs in the clamping direction, and an extrusion member that is engaged with the clamping rod so as to be able to move forward and backward in order to push out the material at the clamping position, and one end of the straight rod-shaped operating lever is attached to the extrusion member. The operating lever and the clamping pawl are connected by a link, so that the opening swinging operation of the operating lever causes the opening swinging of the clamping claw and the forward movement of the extrusion member to be linked. It is known that a structure is provided with another spring for retracting the member (Tokuko Sho
59-599). However, since this conventional clamping tool has a complicated structure, there has been a demand for its simplification.

(Problems to be solved by the invention) This invention aims to simplify the structure of the conventional clamping tool.

(Means for solving the problem) In order to achieve the above object, the clamping tool of the present invention includes a clamping rod fixed to a support frame, and a clamping tool that swings on the support frame to clamp the material between the clamping rods. It has a freely supported clamping claw, and a push-out member held in contact with the clamp rod so as to be freely advanced and retracted in the longitudinal direction thereof, and the tip of the vertical arm of the approximately T-shaped operating lever is attached to the push-out member. At the same time, the horizontal arm at the front of the operating lever and the clamping pawl are connected by a link, thereby interlocking the opening swing of the clamping claw and the forward movement of the pushing member when the operating lever is opened and swung. At the same time, in a positional relationship that increases the distance between the tip of the horizontal arm at the front of the operating lever and the clamping rod, the clamping claw is attached to the tip of the horizontal arm at the front of the operating lever via the link. It has a structure in which a spring is connected that always springs in the closing direction. Embodiments of the present invention will be described below with reference to the drawings.

In Figures 1, 2 and 3, two support frame plates 1,
A clamping rod 2, which also serves as a current-carrying bar, is fixed to the lower part between the support frames 1 and 1, and an eccentric segment-shaped clamping claw 3 is fixed to the front end between the support frame plates 1 and 1 (the left end in FIG. 1). 4 is pivotally attached to the front end of the clamping rod 2 so that its eccentric arcuate surface can move toward and away from the front end of the clamping rod 2, and has a channel-shaped groove on the upper surface of the clamping rod 2 through which the clamping claw 3 can be inserted and removed. A push-out member 5 is placed so as to be movable forward and backward along the longitudinal direction of the clamping rod 2 with its groove facing upward. The clamping claw 3 has a large number of serrated teeth inclined backward (to the right in FIG. 1) on the eccentric arc-shaped clamping surface, and in this example, the teeth are
0.5 to 3 mm, rake angle = 0 to 25 degrees, clearance angle = 45 to 60 degrees to facilitate release from the clamped material. Reference numeral 6 denotes a material insertion port which opens forward and is formed by partially cutting out the front end portions of the support frame plates 1, 1 and between the front end portions of the clamping rods 2.

The operating lever 7 is approximately T-shaped, consisting of a vertical arm 8, a front transverse arm 9, and a rear transverse arm 10. In addition to being movably pivoted, one end of each of the two-piece links 12, 12 is connected to a shaft 13 at the middle part of the front transverse arm 9, slightly closer to the tip.
The other ends of the links 12, 12 are pivotally connected to the middle part of the clamping claw 3 by a shaft 14 with the clamping claw being clamped, and in this case, the clamping claw 3 is attached to the clamping lever. 2 or when holding a material, the T-shaped operating lever 7 is configured in a positional relationship such that it is appropriately tilted forward as shown in the first and third figures. Reference numeral 19 designates a stop pin that restricts the retracting range of the vertical arm 8 of the operating lever 7 and prevents the extrusion member 5 from springing up, and reference numeral 20 designates a stop pin that restricts the opening swing range of the clamping claw 3, both of which are provided on the support frame. It is being In this case, when the rear horizontal arm 10 of the operating lever 7 is used as a handle and is pushed downward in FIGS. 1 and 3, the operating lever 7 swings clockwise about the shaft 11 and the shaft 11 itself moves forward. First, the clamping claw 3 is connected via the link 12.
by swinging it counterclockwise around shaft 4, the clamping rod 2
The shaft 11 is moved away from (open swinging)
The forward movement of causes the pushing member 5 to move forward. Also, the rear horizontal arm 10 of the operating lever 7
During this swing, the tip of the front transverse arm 9 is placed in a positional relationship that constantly increases the distance from the clamping rod 2 until the clamping claw 3 hits the stop pin 20.

A rectangular protrusion 8a is formed at the pivot point of the vertical arm 8 of the operating lever, and the protrusion 8a abuts against the upper surface of the push-out member 5, thereby restricting the front transverse arm 9 from descending beyond a certain level.

In the above configuration, the operation lever 7
Spring receiving pins 15, 15 are provided on both sides of the tip of the front horizontal arm 9, and spring receiving pins 16, 16 are provided protruding from the lower ends of the support frame plates 1, 1, respectively. Coil springs 17, 17 are connected between links 12, 12 in a crosswise manner between 16, 15, 16, respectively, and the clamping claws 3 are crimped to the clamping rod 2 via the links 12, 12 by the springs 17, 17. It is constantly firing in the direction.

The links 12, 12 are formed at positions and thicknesses corresponding to both side walls of the channel-shaped extruded member 5, and have a notched groove 12a on the side of the intermediate portion into which the stop pin 20 can be fitted. Further, at the pivot point of the shaft 14 at the lower end thereof, there are formed chevron-shaped locking protrusions 18, 18 to be locked in the valley-shaped groove 21 at the front end of the upper side wall of the extrusion member 5.

The function of this clamping tool will be explained along with its operation. In this clamping tool, as shown in the fourth figure, the push-out member 5 advances to the intermediate position, and the links 12 and 21 are inserted into the valley-shaped grooves 21, 21.
The operation is performed from the ready state (half-open state) in which the twelve chevron-shaped protrusions 18, 18 are engaged. First, when the end of the material m to be clamped is forcibly pushed into the material insertion port 6, the extrusion member 5 is pushed by the material m and retreats, and the grooves 21, 21 and the protrusions 18, 18 are engaged. , the links 12, 12 are lowered by the tension of the springs 17, 17, and the clamping claws 3 swing clockwise to clamp the material m between them and the clamping rod 2 (the state shown in Fig. 5). ).

To remove material m from the clamp, press the operating lever 7.
When the rear transverse arm 10 of the holder is pushed toward the clamping rod 2 against the springs 17, 17, the operating lever 7 swings clockwise, pulling the links 12, 12 as shown in FIG. 3 is swung to a fully open position in contact with the stop pin 20, and the pushing member 5 is advanced to the front end of the material insertion opening 6, thereby pushing the material m out of the clamping tool.

Next, when the push of the operating lever 7 is released, the operating lever 7 swings counterclockwise due to the tension of the springs 17, 17, closing the clamping pawl 3 and retracting the pushing member 5. 3 is the V-shaped groove 2 of the extrusion member 5 which swings in the closing direction earlier than the retraction of the extrusion member 5 and has retreated to the ready position as shown in the fourth figure.
1, the chevron-shaped protrusions 18, 18 of the links 12, 12 are locked to return to the initial prepared state and maintain that state.

Note that when the front end portion of the clamping rod 2 that comes into pressure contact with the clamping claw 3 bends downward in FIG. Prevent further movement.

(Effect of the invention) According to the clamping tool of the present invention, one spring can be omitted compared to the conventional tool, and the accompanying structure is also unnecessary, so the structure can be greatly simplified. be.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view;
Fig. 2 is an enlarged sectional view taken along the - line in Fig. 1, Fig. 3 is a vertically cut side view, the operating stages are indicated by outline lines, Fig. 4 is a sectional view in a ready state, and Fig. 5 is a sectional view in a clamped state. FIG. 6 is a sectional view in an open state. DESCRIPTION OF SYMBOLS 1... Support frame plate, 2... Holding rod, 3... Holding claw, 5... Extrusion member, 7... Operating lever, 8...
Vertical arm, 9... Front horizontal arm, 10... Rear horizontal arm, 12... Link, 17... Spring.

Claims (1)

[Scope of Claim for Utility Model Registration] A clamping rod 2 fixed to a support frame, a clamping claw 3 swingably supported on the support frame to clamp a material between the clamping rod 2, and the clamping rod 2 2, the extrusion member 5 is held movably forward and backward in the longitudinal direction of the extrusion member 5, and the tip of the vertical arm 8 of a substantially T-shaped operating lever 7 is pivotally connected to the extrusion member 5. The front horizontal arm 9 and the clamping pawl 3 are connected by a link 12, so that when the operating lever 7 is operated to swing open, the opening swing of the clamping pawl 3 and the forward movement of the pushing member 5 are linked. The link 12 is attached to the front end of the horizontal arm 9 of the operating lever 7 in a positional relationship that increases the distance between the front end of the horizontal arm 9 of the operating lever 7 and the clamping rod 2. A clamping tool in which a spring 17 is connected via which the clamping claw 3 is always urged in the closing direction.