JPH10250820A - Workpiece aligning device in clamping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correct the posture of a workpiece easily into an appropriate posture by the rotation of rollers by forming stoppers and clamps of idling rollers standing upright to the transfer face of a conveyor at least at the time of being protruded. SOLUTION: Upon detecting the stop of a workpiece 5 by a contact switch or a contactless switch, clamps 6 are protruded onto the transfer face of a roller conveyor 2 by a driver so as to press the rear end part of the workpiece 5. At this time, in case of the workpiece 5 entering obliquely and being stopped in that state, couple of rotation is generated on the workpiece 5 due to asymmetry of stoppers 4 and the clamps 6, and sliding direction force acts upon the contact faces of the stoppers 4 and clamps 6 with the workpiece 5. The contact parts of the stoppers 4 and clamp 6 are made idling rollers 4A, 6A so as to be freely rotated. The workpiece 5 is therefore rotatory-displaced and corrected in its posture without getting stuck.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work aligning device in a clamp device, and more particularly, to an improvement in a work aligning device in a clamp device particularly suitable for an elongated work conveyed by a conveyor.

[0002]

2. Description of the Related Art Conventionally, a stopper for stopping a work on a transfer surface of a roller conveyor for transferring the work and a clamp for pressing the work toward the stopper have been used as a clamp device for continuously transferring and processing a work. There is known an apparatus which is provided so as to be able to come and go.

That is, as shown in FIGS. 7 and 8, the above-mentioned clamping device 1 is provided with a rotary lever at a predetermined position of a roller conveyor 2 having a large number of rollers arranged so that the leading end thereof protrudes and retracts from the transfer surface of the roller conveyor 2. A stopper 4 formed of a rotary lever is provided at the rear end side of the work 5 in the same manner as the stopper 4 so as to protrude and retract from the transfer surface of the roller conveyor 2. It is configured to be driven by

Then, upon detection of the approach of the work, the stopper 4 is projected by the driving device 3 on the transfer surface of the roller conveyor 2 to stop the work 5, and then, upon detection of the stop of the work 5, the clamp 6 is similarly projected. The work 5 is pressed and fixed to the stopper 4 side, and after performing necessary processing, the stopper 4 and the clamp 6 are immersed, and the work 5 is released.

Although the roller conveyor has been exemplified in the above description, the stopper 4 and the clamp 6 in the case of another conveyor such as a chain conveyor, a belt conveyor or the like may be configured as shown in FIG. 9 (a) or 9 (b). Has been implemented.

[0006] The clamping device 1 shown in FIGS.
Are the same as those shown in FIGS. 7 and 8 except that the positions of the stopper 4 and the clamp 6 are different.

[0007]

By the way, when a workpiece having a longer length than a width, for example, a wall plate is transported and processed by the clamp device, the workpiece 5 is moved in the transport direction as shown in FIG. If the angle θ is small, when the clamp 6 is pulled up to perform positioning, the frictional force at the contact point becomes large, and the workpiece 5 becomes There is a problem in that the stacking is not performed between the clamp and the clamp 6 and the posture is not corrected, so that proper machining cannot be performed.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and a work alignment in a clamp device in which the posture is reliably controlled by raising the clamp even if the work enters obliquely. It is intended to provide a device.

[0009]

That is, a work aligning device in a clamping device according to the present invention comprises a stopper for stopping a work and a clamp for pressing the work toward the stopper on a transfer surface of the conveyor, the transfer surface being provided with a stopper. The stopper device and the clamp device are characterized in that the stoppers and the clamps are idle rollers that stand upright on the transfer surface of the conveyor at least when they protrude.

With the above structure, the stopper,
The posture is adjusted by reducing the friction between the contact point of the clamp and the work and making the work easily roll.

[0011]

Next, an embodiment of the present invention will be described. FIG. 1 is a plan view showing an embodiment of the present invention,
FIG. 2 is a partially omitted enlarged side view.

The features of the present invention reside in the stopper and the clamp, and the other points are the same as those of the conventional example. Therefore, the same parts are denoted by the same reference numerals as those in the drawings described above, and detailed description is omitted.

That is, in the present invention, the stopper 4 and the clamp 6 in FIGS. 1 and 2 are configured as idle rollers 4A and 6A which stand upright on the transfer surface of the conveyor 2 at least when they protrude.

Further, the stopper 4 and the clamp 6 are formed as a pair of two members disposed on both sides in the width direction of the work 5, respectively. Each of the idle rollers 4A and 6A is a roller bearing or a rubber roll having the roller bearing as an axis.

In the above embodiment, the case of a roller conveyor has been described. In the case of another conveyor, the stopper 4 and the tip of the clamp 6 in FIGS. 9A and 9B are idle rollers.

Next, the operation of the above embodiment will be described for a roller conveyor. When the approach of the work 5 is detected by a contact switch or a non-contact switch (for example, a proximity switch, a photoelectric switch, etc., not shown), the stopper 4 is first protruded by the driving device 3 onto the transfer surface of the roller conveyor 2, and the work 5 is stopped. Is done.

Next, if the stop of the work 5 is also detected by a contact switch or a non-contact switch (not shown), the clamp 6 is projected by the driving device 3 onto the transfer surface of the roller conveyor 2, and the rear end of the work 5 is moved. Press.

At this time, if the work 5 enters obliquely and stops as it is, a rotational couple as shown by an arrow is generated in the work 5 due to the asymmetricity of the contact position between the stopper 4 and the clamp 6, and the stopper 5 A force in the sliding direction acts on the contact surfaces of the work 4 and the clamp 6 with the work 5.

On the other hand, since the contact portions between the stopper 4 and the clamp 6 are rollers 4A and 6A, they freely rotate as shown by the arrows, and the work 5 is rotated and displaced without stacking to correct the posture.

Although the case where the clamps 6 are simultaneously raised by the pair of clamps 6 has been described above, the clamps 6 may be alternately operated as follows. In other words, as shown in FIG.
Then, this clamp 6 is immersed, and at the same time, the other clamp 6 is raised as shown in FIG. 5 to correct what could not be corrected by only one clamp 6, and finally shown in FIG. As described above, the clamps 6 on both sides are simultaneously raised to fix the work 5.

By alternately operating in this manner, the rollers 4A,
Regardless of which direction the work 5 is inclined, the posture can be corrected more reliably in combination with the rotation performance of 6A. In the case of other conveyors such as a chain conveyor and a belt conveyor, the operations are the same except that the postures of the stopper 4 and the clamp 6 are different.

[0022]

As described above, according to the present invention, if the incoming work is stopped by the stopper and then fixed by the clamp, the stopper and the work can be moved regardless of the posture of the work. The correct posture can be easily corrected by the rotation of the rollers in accordance with the couple generated at both ends of the work sandwiched between them, thereby preventing a failure in performing the processing in the oblique posture.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a plan view showing a use state.

FIG. 4 is a main part plan view showing another use state.

FIG. 5 is a plan view of a main part showing a use state following FIG. 4;

FIG. 6 is a main part plan view showing a use state following FIG. 5;

FIG. 7 is a plan view showing a conventional example.

FIG. 8 is a side view of a conventional example.

FIG. 9 is a plan view showing a use state of a conventional example.

FIG. 10 is an explanatory diagram showing another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Clamping device 2 ... Conveyor 3 ... Drive device 4 ... Stopper 4A ... Idling roller 5 ... Work 6 ... Clamp 6A ... Idling roller

Claims (1)

[Claims] 1. A clamp device provided on a transfer surface of a conveyor with a stopper for stopping a work and a clamp for pressing the work toward the stopper, wherein the stopper and the clamp are provided so that the stopper and the clamp can be retracted. A work aligning device in a clamp device, characterized in that it is an idler roller that stands upright on a transfer surface of the conveyor at least when it projects.