JPH0230193Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a clamping mechanism for a workpiece in a conveying device used in an automatic processing machine, and in particular, a mechanism for clamping a donut-shaped disk centripetally on its inner diameter.
The present invention relates to a clamp mechanism that performs clamp confirmation detection.

2. Description of the Related Art In a transport device, particularly in a transport device that automatically transfers workpieces, it is necessary to clamp the workpieces accurately and quickly. Generally, a workpiece is clamped using a three-point reference, but the mechanism is complicated, and the device is large and expensive.On the other hand, when using a two-point reference, accurate positioning is difficult. Furthermore, a worker is required to check whether the workpiece is securely clamped or to monitor whether the workpiece is out of stock, and the time required for the worker to do so is relatively long. is the current situation.

The present invention provides three claws for centripetal clamping of the inner diameter of a donut-shaped disk such as a disk substrate or spacer. The object of the present invention is to provide a device that operates organically using a cylinder as a driving source and can reliably perform the clamping, and also to provide a clamp detection mechanism that can check whether or not a disk has been clamped.

Embodiments of the present invention will be described below with reference to the drawings.

1, 2, and 3a and 3b are a front view, a rear view, and a cross-sectional view of the clamp device according to the present invention, and FIG. 1 shows the state seen from the front, and FIG.
The figures show the state seen from the back side, and FIG. 3a shows a cross section taken along the line BB' in FIG. 1, and FIG. 3b shows a cross section taken along the line A-A' in FIG. 1. FIGS. 4a and 4b are a front view and a side view of the second slider 7. FIG. This clamping device is roughly divided into a linear guide mechanism, a link lever mechanism, and a clamp detection mechanism, and these mechanisms are organically combined on the front and back sides of the base 30.

Here, in the linear guide mechanism, guide guides 1, 2, and 3 are attached to a base 30 at a pitch of 120 degrees, and sliders 4, 5, and 6 are incorporated in each guide. The part has claws 8,
9 and 10 are fixed by screwing.
Furthermore, this will be explained with reference to the assembled sectional views shown in FIGS. 3a and 3b. A pin 11 is attached to the surface opposite to the surface on which the slider 9 is fixed, and the slider 4, 5 is set by inserting the pin 11 into a slot 30a previously provided in the base 30. However, base 30
A spring 12 is hung on the head of the pin 11 protruding from the back surface of the slider 4, and the tension of the spring 12 causes the slider 4,
5 is pulled in a direction away from the center, but the stopper position can be determined by a screw stopper 13. On the other hand, the linear guide mechanism incorporating the slider 6 is composed of a second slider 7 and an air cylinder 14.
Fixed by That is, the block 40 has a convex shape when viewed from the side, and the convex portion at the center engages with a notch formed in the air cylinder 14, and the two are connected by the pin 42. Furthermore block 4
0 is fixed to the base 30 with screws 41.

Further, a second slider 7 is fixed to the head portion 14a' of the piston 14a of the air cylinder 14.
Further, a pin 11' attached to the second slider 7
is arranged so as to be inserted into a slot 30b previously provided in the base 30. Also, base 30
The slider 6 is set on the surface of the slider 6, and the switch 20 is mounted on the block 25 on the opposite surface to the surface on which the claw 10 is fixed.
The switch 20 is mounted via the base 3
It is inserted into the slot 30b of No. 0, reaches the gap formed between the back surface of the base 30 and the air cylinder 14, and is disposed so as to come into contact with the second slider 7.

The second slider 7 will be explained using the front view and side view of FIGS. 4a and 4b.

The second slider 7 is composed of vertically wide parts 7d and 7e formed with a groove 7c in between.

A pin 1 for catching one end of the spring 15 is provided at the middle part in the longitudinal direction of the wide part 7e.
1, and on the other hand, a first lever 1 which is part of the clamp mechanism is provided at the end of the wide portion 7d.
A pin 16 is provided, with which the ends of the pins 7 are rotatably engaged.

A notch 7b is formed on one side of the wide portion 7d at a position facing the second switch 21, and a notch 7a is formed on the other side at a position facing the third switch 22. ing. A spring 15 having a spring constant sufficiently larger than the sliding friction of the slider 6 is applied between the head of the pin 11' protruding from the surface of the base 30 and the slider 6, and its tension causes the slider 6 to It is connected to the second slider 7 through the block 25 and switch 20, and the drive of the air cylinder 14 is transmitted to the slider 6 through the second slider 7.

The link lever mechanism also includes a pin 1 attached to the end of the second slider 7 on the back side of the base 30.
6 is fitted into a slot formed at the end of a pair of first levers 17, and one end of a second lever 18 is rotatably engaged with the other end of the first lever 17. Further, a hook 19 is rotatably engaged with the other end of the second lever 18, and the first lever 17 and the hook 1
9 is the fulcrum 1 which is the center of each rotational movement.
7' and 19' are provided. Here, the first lever 17 is composed of a pair of independent levers, and is therefore rotatable in opposite directions around the air cylinder 14. Since the hook 19 is hooked on the pin 11 attached to the sliders 4 and 5, the linear motion of the air cylinder 14 is transmitted to the hook 19 via each lever, where it is converted into rotational motion. .

As a result, the sliders 4, 5 perform a linear movement along the guides 1, 2 against the force of the spring 12.

Furthermore, the clamp detection and non-clamp detection mechanisms include a first switch 20 attached to the slider 6 via a block 25, a third switch 22 attached to the base 30, and a notch 7a formed in the second slider 7. Composed by. Whether or not the workpiece 31 has been detected is determined by comparing the operations of the first switch 20 and the third switch 22.

Note that the groove is formed at the tip of the claw to ensure accuracy in positioning the workpiece.

In this configuration and mechanism, when the air cylinder 14 is first driven to move the second slider 7 toward the center, the second slider pushes the block 25, so that the slider 6 moves in the direction of the solid line in FIG. Move toward the center of 31.

Also, since the levers 17, 18 and the hook 19 move in the direction shown by the solid line in FIG. 2, the sliders 4 and 5 move in the direction shown by the solid line arrow in FIG. Move towards the center. Therefore, at first the notch 7b of the second slider
The second switch 21, which corresponded to
Preparations for acceptance of 1 have been completed. After receiving the workpiece 31, the clamping operation begins, but first the air cylinder 1
4 to move the second slider 7 away from the center, each lever and hook move to the second position.
Three claws 8,
9 and 10 simultaneously move away from the center of the work 31. Then, the claws 8 and 9 stop after moving a predetermined stroke by the screw stopper 13, and this becomes the reference claw. On the other hand nail 1
0 continues to move, and at the same time as it clamps the workpiece 31, a gap is formed at the connection part between the block 25 and the second slider 7, and the first switch 2
0 works. Then, only the second slider 7 continues to move further. As a result, the third switch 22, which was initially opposed to the notch 7a of the second slider 7, operates to face the side surface of the second slider 7. As a result, the movement of the second slider 7 is stopped. However, if the workpiece 31 is not prepared, the claw 10 (and therefore the slider 6) and the second
The second slider 7 continues to move while being connected by the spring 15, and stops because the second slider 7 operates only the third switch 22. Therefore, the first switch 20 does not operate when the workpiece 31 is not clamped, and the non-clamped state can be detected by comparing the operations of the first switch 20 and the third switch 22.

As described above, the present invention consists of a combination of a simple link lever mechanism, a linear guide mechanism, and a clamp detection mechanism, and the workpiece is reliably clamped by three claws, and it is also detected whether the workpiece is reliably clamped. It is something that can be done. Furthermore, it becomes possible to work quickly and reduces the time required for workers to work, which contributes to reducing production costs.In addition, the equipment can be made smaller and manufactured at lower cost, which has a significant effect. It is a big one.

[Brief explanation of the drawing]

1 and 2 are front and rear views of the clamp device according to the present invention, FIGS. 3 a and b are assembled sectional views of the linear guide mechanism, and FIGS. 4 a and b are front views of the second slider 7. and a side view. 1, 2, 3... Guide, 4, 5, 6... Slider, 7... Second slider, 8, 9, 10...
...Claw, 11, 11', 16...Pin, 12, 15
... Spring, 13 ... Screw stopper, 14 ... Air cylinder, 17 ... First lever, 18 ... Second
lever, 19... hook, 17', 19'... fulcrum, 20... switch, 21... second switch, 22... third switch, 30... base,
31...Work.

Claims (1)

[Claims for Utility Model Registration] A clamping mechanism that clamps a donut-shaped member 31 by pressing three claws 8, 9, and 10 movable in the outer circumferential direction onto the inner periphery of the donut-shaped member 31, comprising: a base; Three guides 1, 2, and 3 are provided at an angle of approximately 120 degrees on one surface of the donut-shaped member 31, and allow the donut-shaped member 31 to move in the radial direction; Spring 12, 15 is provided to apply a force in the direction in which the claws 8, 9, 10 provided at the ends of the slider move away from the center, and the three sliders 4, 5, 6 can reciprocate along the guide.
and directly coupled to one slider 6 of the three sliders, and counteracting the force of the spring 15 to
An air cylinder 1 that moves linearly and is provided on the other side of the base that reciprocates two sliders 6.
4, a link mechanism that transmits the driving force from the air cylinder 14 to the remaining two sliders 4 and 5 to cause the one slider 6 to reciprocate in the same direction at the same time, and the remaining two sliders 4. . 15, and the claw 10 provided on the one slider 6 connects to the donut-shaped member 31.
a clamp detection mechanism that detects that the movement of the one slider 6 has stopped and stops the air cylinder 14 by engaging with the inner periphery of the donut; The clamp is characterized by being provided with a non-clamp detection mechanism that detects that the one slider 6 has moved by a specified value or more and stops the air cylinder 14 by not engaging the inner circumference of the shaped member 31. mechanism.