JPS6024529Y2 - positioning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a positioning device for attaching a workpiece to a predetermined position.

Workpieces are sequentially transported in a dedicated machine tool, positioned at a predetermined processing position, and fixed using a clamp device or the like.

Positioning of a workpiece is usually performed by inserting two positioning pins into a reference hole of the workpiece, etc.1, but in order to position workpieces with different reference hole positions, the necessary positioning pins must be selected.

A conventional positioning device of this type is provided with a drive source for each positioning pin.

Therefore, the structure of the device is complicated and expensive.

The present invention solves the drawbacks of the conventional example described above, and allows a plurality of positioning rods to be simultaneously driven by one driving means, and selectively operating the necessary positioning rods by another driving means. .

Hereinafter, the present invention will be specifically explained based on an embodiment shown in the drawings.

As shown in FIGS. 1 and 2, the positioning device 1 of the present invention has a rotating shaft 3 capable of swinging motion by a first driving means 2.
and a moving shaft 5 displaceable in the axial direction by the second drive means 4.
are connected by a shaft coupling 6, and a plurality of swing arms, for example three swing arms, are connected to the rotation shaft 3 and the movement shaft 5. , 8.9 and each swinging arm? , 8. A positioning rod 10 whose one end of 9 can be freely displaced in the vertical direction, for example.
A holding shaft 14 that is engaged with the groove 13 of 11.12° and parallel to the moving shaft 5 is attached, and the two small diameter portions 15 of this holding shaft 14 are connected to two positioning rods 11.12.
It is configured to selectively fit into the holding recess 16 of.

The first drive means 2 is constituted by, for example, a first cylinder 17, whose cylinder rod 18 is connected to an operating arm 19 by a pin 2o.

The operating arm 19 is attached to one end of the rotating shaft 3 with a spline or the like so that it cannot rotate.

The rotating shaft 3 is rotatably held in a fixed position with respect to the frame 21 by a bearing 22, and the moving shaft 5 is connected to a shaft coupling 6 at one end.
is supported by the rotation shaft 3, and the other end portion is supported by the frame 2.
It is held by one sliding bearing 23.

The shaft joint 6 is connected to the rotating shaft 3 and the moving shaft 5 by a spline 24 or the like, and allows displacement of the moving shaft 5 in the axial direction, while transmitting the rotational motion of the rotating shaft 3 to the moving shaft 5. .

Three swinging arms? , 8. Of the 9, one swinging arm 7 is fixed to the rotating shaft 3 in a non-rotating state by means such as a spline, and the other two swinging arms 8 and 9 are fixed to the moving shaft 5 by similar coupling means. It is fixed in a stopped state and moves in the axial direction as the moving shaft 5 moves.

On the other hand, the three positioning rods 10, 11, and 12 are held slidably in the vertical direction relative to a bush 25 of the frame 21, and a positioning pin 26 is formed at the upper end portion thereof.

One end of each of the swing arms 7.8.9 has a circular shape and engages in a groove 13 of the positioning rod 10, 11, 12.

Further, the holding shaft 14 is connected to the moving shaft 5 in a parallel state by a connecting plate 27 in a state where it is allowed to rotate, and is in a state where it can move with the displacement of the moving shaft 5 in the axial direction.
Two small-diameter portions 15 are formed at positions slightly smaller or larger than the spacing between the two positioning rods 11, 12.

This small diameter portion 15 corresponds to the holding recess 16 of the positioning rods 11, 12.

The moving shaft 5 and the holding shaft 14 are driven by the second driving means 4.

The second drive means 4 is constituted by a second cylinder 28, for example.

The second cylinder 28 is attached to a bracket 31 attached to the side of the frame 21, and its cylinder rod 2
9 is connected to the elongated hole 3 at one end of the operating lever 33 by the connecting pin 32.
It is connected to 4.

The operating lever 33 is swingably supported by a support shaft 35 on the bracket 31, and faces the engagement groove 36 of the moving shaft 5 at its other end.

The workpiece 37 is guided by a pair of guide rails 38 on the frame 21 and regulated by guide rails 39 on both sides.

The length of the work 37 varies depending on the type, one being Dl and the others being D2.

The workpiece 37 is fixed by the clamp piece 40 at the processing position.

Next, the operation will be explained.

The workpiece 37 is placed on the guide rail 38, moved in the direction of the arrow by appropriate means, and stopped at the processing position.

If the length of the workpiece 37 is increased, two positioning rods 10 and 11 are used to position the workpiece 37.

Therefore, the second cylinder 28 has moved its cylinder rod 29 backward, and therefore the moving shaft 5 has been displaced to the left in the drawing.

Therefore, the tip of the swing arm 8 of the moving shaft 5 enters the groove 13 of the central positioning rod 11.

When the cylinder rod 18 of the first cylinder 17 rises from the lowered position in this state, the rotating shaft 3 and the moving shaft 5 rotate, and the positioning rods 1G and 11 are raised by the tip portions of the respective swing arms 7.8. let

At this time, the small diameter portion 15 on the left side is separated from the position of the holding recess 16 as shown in FIG. 2, allowing it to rise.

In this way, the positioning pin 26 of the positioning rod 10.11 fits into the reference hole 37a of the workpiece 37, thereby positioning the workpiece 37 at a fixed position.

Thereafter, the clamp piece 40 descends and completely fixes the workpiece 37 in a fixed position.

After this fixing operation is completed, the tool (not shown) moves to the workpiece 37.
A predetermined cutting process is applied to the surface.

In this state, the tip of the other swing arm 9 is in a position out of the groove 13 of the positioning rod 12, so the positioning rod 12 remains in a lowered state.

Moreover, at this time, as shown in FIGS. 1 and 4, the holding shaft 1
Since the portion 4 fits into the holding recess 16 of the positioning rod 12, the positioning rod 12 is reliably held without vertical movement.

Now, when the workpiece 37 has a length D2, two positioning rods 10°12 on the left and right except for the center are used.

Therefore, when all the positioning rods 10.11.12 are at their lowering points, the second cylinder 28 is operated and the operating lever 33 is rotated counterclockwise.

In this way, the moving shaft 5 is displaced to the right, and the right swing arm 9 fits into the groove 13 of the positioning rod 12.

Of course, at this time, the central swinging arm 8 comes out of the groove 13 of the positioning rod 11.

Moreover, since the small diameter portion 15 of the holding shaft 14 is located in front of the holding recess 16 of the positioning rod, the positioning rod 12
is set so that it can be moved up and down freely.

Of course, at this time, the holding recess 16 of the central positioning rod 11 is newly fitted into the outer diameter portion of the holding shaft 14, so that the workpiece 37 is held stationary during machining.

After performing such a switching operation, the first cylinder 17
When the rotation shaft 3 and the movement shaft 5 are rotated in a predetermined direction, the left and right positioning rods 10 and 12 fit into the reference hole 37a of the workpiece 37.

In addition, in the above embodiment, three positioning rods 10°11.1
2, but the number of installed grooves 13 may be three or more, and as shown in FIG. It may also be formed to face the

Furthermore, the first drive means 2 and the second drive means 4 are not limited to cylinders, and may be replaced with other drive sources.

According to the present invention, since the moving shaft is connected to the rotating shaft by the shaft joint in a state in which it can be displaced in the axial direction, the plurality of rotating arms are driven by one first driving means, so that the positioning rod Since a drive source is not required for each movement, and a positioning rod is selectively used depending on the displacement of the moving axis,
It can easily correspond to the type of workpiece, and furthermore, since the positioning rods that are not selected when selecting the positioning rods are supported in a stationary state by the holding shaft, malfunctions can be reliably prevented.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view of the positioning device of the present invention;
The figure is a vertical cross-sectional view, Figure 3 is a front view of the connecting part between the cylinder rod and the operating arm, Figure 4 is a side view showing the relationship between the holding shaft and the positioning rod, and Figure 5 is another embodiment of the positioning rod. It is a side view of a part which shows an example. DESCRIPTION OF SYMBOLS 1... Positioning device, 2... First drive means, 3... Rotation shaft, 4... Second drive means, 5... ...Moving axis, 6...Shaft coupling,
? , 8, 9... Swinging arm, 10.11, 12
...Positioning rod, 13...Groove, 1
4... Holding shaft, 15... Small diameter part, 16
...Retention recess.

Claims (1)

[Scope of utility model registration request] A rotating shaft that can be rotated by the first driving means and a moving shaft that can be displaced in the axial direction by the second driving means are connected by a shaft coupling, and a plurality of swinging arms are connected to the rotating shaft and the moving shaft. At the same time, one end of each of the swing arms is engaged with the groove of the positioning rod, and a holding shaft parallel to the moving axis is attached, and the small diameter part of this holding shaft is selected as the holding recess of the positioning rod. A positioning device characterized in that it positions workpieces having different fitting reference hole positions.