JPH0929364A - Device for clamping material in sheeting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protective means for preventing such danger for example as an operator clamps his finger with the finger accidentally inserted in the opening for inserting a work and crushes the finger, in the clamp device to feed a material (work) W to a punching press for sheeting. SOLUTION: A movable stopper 8 for preventing the closing of a clamp by blocking the opening 6 is arranged at the tip end of a lower clamp jaw 4 through a compression coil spring 9 that elastically actuates towards the tip end; am relief opening 10 is provided for this stopper 8 and the spring 9 at the position of the upper clamp jaw 3 corresponding to the position where a work W pushes in the stopper 8 to a prescribed position against the compression force of the spring 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for clamping a material work in a sheet metal working machine such as a punching press.

[0002]

2. Description of the Related Art For example, in a punching press of this type, in order to supply a sheet metal material (workpiece) to a processing portion such as a turret disk of the punching press, for example, FIG.
First, as shown in the side view of the main part, the work W is releasably held by the tip of the clamper 1 of the work clamp device 2 attached to a carriage (not shown).

FIG. 4 (b) is an enlarged partial sectional view of the tip A portion of the clamper 1. 3 is an upper clamp jaw, 4 is a lower clamp jaw, both jaws 3 and 4 are pivotally supported with respect to each other at a fulcrum 5, and the upper clamp jaw 3 can be pivoted at a predetermined angle with respect to the lower clamp jaw 4. An opening 6 is provided as an insertion port for the work W, and the work W is inserted into the abutting surface 7
The upper clamp jaw 3 is pivotally closed to the state shown in 3a, and the work W is gripped.

[0004]

However, in the conventional construction of the clamper 1 as described above, the opening 6 for receiving and inserting the work W having a gap of, for example, about 6.5 to 10 mm is used.
Therefore, if the operator accidentally inserts a finger or the like in the opening into the opening, there is a risk that the operator may crush the finger.

The present invention has been made in order to avoid the above-mentioned dangers. In order to prevent the finger from entering the clamper when it is opened, or even if the finger is squeezed with a slight touch, the finger may be crushed. It is intended to provide protection measures to prevent the occurrence.

[0006]

Therefore, the present invention provides a material clamp device for supplying a sheet metal material to a sheet metal working machine, in which the opening between the upper and lower clamp jaws is opened when the clamp device is opened. It is an object of the present invention to achieve the above-mentioned object by means of a material clamping device for a sheet metal working machine, which is provided with movable protection means for preventing the insertion of a finger part of a human body at least.

[0007]

With the structure of the present invention as described above, the presence of the movable protection means prevents the operator's finger or the like from being accidentally inserted into the opening when the clamp is opened, and the material clamp can be safely operated without any trouble. The operation can be performed.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.
A plurality of embodiments based on the clamper configuration shown in FIG. 4 will be described with reference to the drawings.

[0009]

【Example】

(Embodiment 1) FIG. 1 shows a side view of a main portion of a first embodiment. At the front end opening of the clamper 1, a stopper 8 of a block body as a movable protection member having a size close to the opening height is provided.
Is biased to be pushed out in the distal direction by a compression coil spring 9 having a relatively weak spring force, closing the opening 6 and accidentally closing the clamp with the operator's finger slightly intruded. However, the opening 6 does not become thinner than the thickness of the stopper 8 and the danger can be prevented.

When the work W is actually clamped,
When the work W pushes the stopper 8 in the direction of the fulcrum 5 against the elastic force of the spring 9 and the front surface of the stopper 8 moves to the abutting surface 7, the stopper 8 for the upper clamp jaw 3 and the spring 9 The escape opening 10 is configured so as not to interfere with the stopper 8 and the spring 9 even when the upper clamp jaw 3 is closed.

(Embodiment 2) FIGS. 2 (a) to 2 (d) are side views showing the essential parts of the second embodiment according to the present invention. (A)
The figure shows a partial cross-sectional side view of the main part when the clamper is opened, (b)
The figure shows (a) the state diagram of the tip of the work W when the clamper is closed and the work W is gripped, and (c) shows the case where the work W is relatively thick. In the case (a), the equivalent view and (d) show a front view of a block pin assembly in which a plurality of block pins can be simultaneously lifted by one knob.

In FIGS. 1 (a) to (d), a plurality of block pins 11 are inserted into the respective holes at the tip of the upper clamp jaw 3 at appropriate intervals in the width direction of the work W, so that It is arranged so that it can slide. Each block pin 1
1 has a drop stopper head 12 at the top and a lower head 13 at the bottom so as not to drop upward due to inertial force when the work W is moved, and each pin insertion hole of the upper clamp jaw 3. Are provided with counterbore portions 14/15 on the upper and lower surfaces, respectively, and are configured to accommodate the upper and lower heads 12/13, respectively.

As for the total length of each block pin 11, in the state (a) of the clamper opened state, the size of the clearance 6a of the work W insertion opening is slightly larger than the plate thickness of the normal target work W, and the operator The size of the hand is set so that the fingers of

Further, in order to deal with the case where a work W having a relatively thick dimension is targeted, a plurality of block pins 11 are
(D) As shown in the figure, it is constructed as an assembly fixed to the block pin connecting member 16 provided with a knob 17, (c)
As shown in the figure (a) corresponding diagram, when the work W is being held, the pins 17 are simultaneously pulled up by the knobs 17.

(Embodiment 3) Furthermore, FIGS. 3 (a) and 3 (b)
The top view and the side view of the third embodiment are shown in FIG.

In this embodiment, the lower clamp jaw 4 is provided with a gate-shaped guard member 20 for covering the opening of the clamper 1 from the front and both side surfaces, and the horizontal clamp shaft 2 in the width direction of the lower clamp jaw 4.
It is arranged so that it can be rotated about two times, and a guard lifting knob 21 is fixedly installed in the center of the front surface thereof, so that the risk of the operator's fingers being caught is prevented at all times, and only when the work W is held. The operation of the knob 21 corresponds to the insertion of the work W.

The embodiment of the present invention is not limited to each of the above embodiments, and it is needless to say that various modifications can be adopted in accordance with the object of the present invention.

[0018]

As described above, according to the present invention,
Since a movable finger intrusion protection member is provided in the opening of the work clamper, it is possible to eliminate the possibility that the operator may inadvertently injure his / her finger. Can also respond.

[Brief description of drawings]

FIG. 1 is a side view of a configuration of essential parts of a clamper according to a first exemplary embodiment.

FIG. 2 is an explanatory diagram of a configuration of essential parts of a clamper according to a second embodiment.

FIG. 3 is an explanatory diagram of a configuration of essential parts of a clamper according to a third embodiment.

FIG. 4 is a cross-sectional side view of main parts of a conventional clamper.

[Explanation of symbols]

 1 Clamper (Material Clamping Device) 2 Carriage 3 Upper Clamping Jaw 4 Lower Clamping Jaw 5 Support Points 6, 6a Opening (Work Inserting Port) 7 Work Abutting Surface 8 Stopper 9 Spring 11 Block Pin 12 Drop Stopper Head 13 Lower Head 14, 15 Counterbore 17,21 Knob 20 Guard member 22 Axis W Material (work)

Claims (4)

[Claims] 1. A material clamp device for supplying a sheet metal material to a sheet metal working machine, wherein at least a finger part of a human body is inserted into an opening between upper and lower clamp jaws when the clamp device is opened. A material clamping device for a sheet metal working machine, which is provided with a movable protection means for preventing the above. 2. The front-rear direction movable stopper member according to claim 1, wherein the movable protection means is elastically biased toward a clamp tip end so as to close the opening, and is movable backward and forward to a predetermined position. A material clamping device for a sheet metal working machine, which is characterized in that 3. The movable protection means according to claim 1, wherein the movable protection means is a plurality of block pin members arranged so as to be vertically displaceable in the respective guide holes of the tip portion of the upper clamp jaw. Material clamping device for sheet metal processing machine. 4. The material for a sheet metal working machine according to claim 1, wherein the movable protection means is a gate-shaped guard member pivotally attached to the lower clamp jaw and swingable in the vertical direction. Clamp device.