JPH0123726Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a clamping device with a workpiece attitude changing mechanism that changes the attitude of a workpiece and clamps the workpiece.

<Prior Art> The posture of a workpiece when it is transported between mines on a processing line may be different from the posture of a workpiece when it is clamped by each machine. In this case, conventionally each machine was equipped with a workpiece posture changing device separate from the clamping device, the workpiece posture was changed by the workpiece posture converting device, the workpiece was carried into the machine, and the workpiece was clamped by the clamping device. . For this reason, an extra space is required to provide the workpiece posture changing device, resulting in a problem of increased costs.

<Purpose of the invention> The present invention has been made to solve this problem, and its purpose is to provide a clamping device with a workpiece posture changing mechanism that can also change the posture of the workpiece.

<Structure of the invention> The clamping device with a workpiece posture changing mechanism according to the invention has a cylinder device in the fixed part, a bracket is fixed to the tip of the piston rod of this cylinder device, and a cage that holds the workpiece can be swung on this bracket. The cage and the bracket are each provided with contact portions that contact each other to prevent the cage from swinging beyond a certain angle, and the spring applies a rotational moment to the cage in a direction in which these contact portions contact each other. is provided between the car-side member and the fixed part, and an engaging part that engages with each other so as to swing the car by utilizing the backward movement of the piston rod is provided in the car or a part connected to the car and the fixed part. <Embodiments> Examples of the present invention will be described below based on the drawings. In FIGS. 1 and 2, 10 is a base, and support plates 11 and 12 are erected on this base 10. In FIG. 1, side plates 13 and 14 are fixed to the front and rear of support plates 11 and 12.

A cylinder block 20 is tilted and fixed on the base 10 between the side plates 13 and 14, and a first cylinder chamber 21 and a second cylinder chamber 22 are formed in the cylinder block 20 so as to be tilted with respect to the horizontal axis and parallel to each other. ing. A piston 23 is slidably fitted into the first cylinder chamber 21.
One end of a piston rod 24 is fixed to.
A flanged rod 25 is slidably fitted into the second cylinder chamber 22, and a spring 26 for pressing the flanged rod 25 downward is interposed between the second cylinder chamber 22 and the flanged rod 25. There is. A first engaging portion 27 (hereinafter referred to as a stopper 27) is provided at the lower part of the cylinder block 20 and projects into the second cylinder chamber 22, and the second engaging portion 25a of the flanged rod 25 is connected to the stopper 27. By this contact, the amount of descent of the flanged rod 25 is limited. The cylinder block 20, piston 23, and piston rod 24 constitute a cylinder device 28.

A bracket 30 is fixed to the upper part of the piston rod 24 at right angles to the axis of the piston rod 24, and the flanged rod 25 can slide on this bracket 30. A cage 31 is pivotally supported on the bracket 30 so as to be able to swing around a horizontal axis at right angles to the axis of the piston rod 24, and a long groove 33 is formed in the cage 31 so as to engage a pin 32 fixed to the tip of the flanged rod 25. It is formed.

The basket 31 mainly includes a basket body 34, a plate 35 fixed to the basket body 34, and a plate 35.
and two arms 36 and 37 fixed to the basket body 34 facing each other. A first contact portion 30 formed on the upper surface of the bracket 30 on the side of the flanged rod 25 is on the lower surface of the basket body 34 on the side of the flanged rod 25.
A second abutting portion 34a is formed that abuts the first abutting portion 34a, and the clockwise swing of the cage 31 is prevented by abutting the first abutting portion 30a and the second abutting portion 34a. It's becoming like that. The basket body 34 has 2
The book guide rails 40, 41 are connected to the piston rod 24.
fixed at right angles to the axes of and parallel to each other,
A first presser rail 42 is fixed to the tip of the plate 35 facing these guide rails 40, 41, and a second presser rail 43 is fixed to the tips of the arms 36, 37. The workpiece W is guided and supported by these guide rails 40, 41, the first presser rail 42, and the second presser rail 43.

A piston rod 2 is installed at the top of the side plates 13 and 14.
A dowel 15 extending perpendicularly to the axis of the workpiece W is fixed thereto, and a dowel pin 51 that engages with a notch hole 50 of the workpiece W is fixed to this transverse dowel 15. Also, I laid down 1
5 is a stopper 5 that comes into contact with the reference surface 52 of the workpiece W.
3 and 54 are fixed, and the workpiece W is clamped by the supports 53 and 54 and the guide rails 40 and 41.

Two follower rollers 55 and 56 are pivotally supported on the upper part of the horizontal plate 35 and project toward the cylinder block 20 side, and cams 57 and 58 that come into contact with the follower rollers 55 and 56 are fixed to the upper part of the plate 35. Forward rollers 55, 56 and cams 57, 5
8 prevents the cage 31 from swinging counterclockwise during clamping.

60 is a processing head that can move forward and backward in the left and right directions in FIG.

The posture changing operation, clamping, and unclamping operation of the workpiece W will be explained based on the above-described configuration.

Figure 1 shows the state where the workpiece W is clamped,
From this state, the cylinder device 28 is operated to lower the piston rod 24 together with the bracket 30. At this time, the car 31 is prevented from swinging counterclockwise by the front roller 55 and the cam 57, and the car 31 retreats in a linear motion without swinging due to the force of the spring 26. As a result, the engagement between the workpiece W and the knock pin 51 is released, and the workpiece W is unclamped.

When the piston rod 24 retreats further and the follower roller 55 approaches the inclined surface 57a of the cam 57, and the flanged rod 25 comes into contact with the stopper 27, the cage 31 begins to swing counterclockwise. The posture of the workpiece W is changed by this swinging of the cage 31. When the piston 23 comes into contact with the rear end of the first cylinder chamber 21, the cage 31 is prevented from swinging, resulting in a state as shown in FIG. 3. In this state, the workpiece W is transported to the next machine in the front-rear direction of the paper in FIG.

A new work W is placed in the basket 31 in the state shown in Fig. 3.
When the is carried in, the cylinder device 28 is activated,
The piston rod 24 is raised together with the bracket 30. At this time, since the flange rod 25 side of the cage 31 is prevented from moving by the spring 26, the cage 31 first swings clockwise. As a result, the attitude of the workpiece W is changed. The second contact portion 34a of the car main body 34 comes into contact with the first contact portion 30a of the bracket 30, thereby preventing the car 31 from swinging clockwise, and then the cam 57 engages with the front roller 55. match. bracket 30
The second contact portion 34a of the car body 34 is pressed against the first contact portion 30a by the force of the spring 26, and the counterclockwise swinging of the car 31 is prevented by the front roller 55 and the cam 57. When the piston rod 24 is further raised in this state, the cage 31 also moves up in a straight line, and the notch hole 5 of the workpiece W is
0 is knocked into the knock pin 51. Work W
When the supports 53 and 54 come into contact with the reference surface 52 of
3 and 54, as shown in FIG. 1, and in this state, the processing head 60 moves forward and processes the workpiece W.

In the embodiment described above, a flanged rod 25 is provided, and this flanged rod 25 and the second cylinder block 20 are connected to each other.
Although we have described an example in which a spring 26 is interposed between the cylinder chambers 22 and a stopper 27 is provided at the lower part of the cylinder block 20 to limit the amount of descent of the flanged rod 25, another modification is shown in FIG. One end of the flanged rod 71 passing through the bracket 70 is fixed to the cage 73 so that the stopper 74 fixed to the bracket 70 and the cage 73 come into contact between the flanged portion 71a of the flanged rod 71 and the bracket 70. A spring 72 that applies a rotational moment to the car 73 is interposed, and a protrusion 73a is provided on the car 73 so as to overcome the spring 72 and swing the car 73 when unclamping.
The fixing portion 75 may be provided with an abutting surface 75a that comes into contact with the fixing member 3a, and this also allows the posture of the workpiece to be changed and the workpiece to be clamped.

<Effects of the invention> As described above, the present invention provides a cylinder device in the fixed part, fixes a bracket to the tip of the piston rod of this cylinder device, and pivotally supports the basket holding the workpiece on this bracket. In order to prevent the car from swinging beyond a certain angle, the car and the bracket are provided with abutting parts that abut each other, and a spring is attached to the car side to apply a rotational moment to the car in the direction in which these abutting parts abut each other. An engaging part is provided between the member and the fixed part, and engages with each other to swing the cage by utilizing the backward movement of the piston rod. The posture of the workpiece can be changed and the workpiece can be clamped without using a posture changing device. Therefore, there is an advantage that the space of the entire device can be reduced and costs can be reduced.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a partially sectional view of a clamping device with a workpiece posture changing mechanism according to the present invention, and FIG. 2 is a partially sectional view taken from the direction shown in FIG. 1. 3 is a diagram of the operating state during unclamping, and FIG. 4 is a simplified diagram of a clamping device with a workpiece posture changing mechanism showing another modification. 20... Cylinder block, 23... Piston, 24... Piston rod, 25... Flange rod, 25a... Second engaging part, 26... Spring, 27... First engaging part (stopper) , 28...
...Cylinder device, 30...Bracket, 30a...
...first contact portion, 31...basket, 34a...second
contact portion, 53, 54... stop, W... work.

Claims (1)

[Scope of utility model registration request] A cylinder device is provided in the fixed part, a bracket is fixed to the tip of the piston rod of this cylinder device, and a cage holding a workpiece is pivotally supported on this bracket so as to be able to swing, and in order to prevent the cage from swinging beyond a certain angle. Contact parts that contact each other are provided on the car and the bracket, and a spring is provided between the car side member and the fixed part to apply a rotational moment to the car in the direction in which these contact parts contact each other, and the piston rod is A clamping device with a workpiece posture changing mechanism for use in a processing line, in which a member on the cage side and a fixed portion are provided with engaging portions that engage with each other to swing the cage using backward movement.