JPS6035576Y2 - Pallet positioning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for positioning pallets at each station, for example in an in-line pallet feeding transfer machine.

Conventionally, in this type of transfer machine, pallet positioning at each station has been carried out by inserting pallet positioning pins, wedges, or the like.

In other words, to drive these positioning pins, one actuator must be provided for each positioning pin, or one drive shaft can be used to convert rotational motion into linear motion using a link or the like. I was going.

However, the former method of providing one actuator at a time has the disadvantage that if there are a large number of stations, a large number of actuators are required for each station, making the device itself expensive.

In addition, the latter method using a link using a drive shaft has the drawback that the number of parts such as links increases, and the device itself becomes expensive.

Furthermore, in both cases, guide bushings such as positioning pins and wedges had to be finished with high precision, and they also had the drawback of requiring a large number of man-hours in terms of machining.

The present invention was developed in light of these circumstances, and its purpose is to provide a simple configuration that greatly reduces the number of parts, actuators, and processing man-hours, and to smoothly position pallets at each station. An object of the present invention is to provide a pallet positioning device that can perform the following operations.

The feature of the present invention is that the pallet is provided with a positioning portion consisting of a groove or a protrusion, and one drive shaft rotationally driven by one actuator has an outer peripheral portion that engages with the positioning portion of the groove or protrusion. The positioning cam plate is mounted eccentrically and the pallet is smoothly and accurately positioned at a desired position by the engagement relationship between the cam plate and the positioning portion of the pallet.

Hereinafter, one embodiment of the present invention will be explained in detail with reference to the drawings.

FIG. 1 shows the entire device of the present invention, and FIG. 2A.

B shows each driving process of this device.

In the figure, 1 is a pallet whose both side edges are guided by guide grooves 2a, 2a of guide rails 2, 2, and is intermittently transported by a fixed amount of movement in the transport direction of arrow X by, for example, a piston cylinder device. .

The bottom surface of the pallet 1 has a positioning section 3 formed of a groove in a direction perpendicular to the conveying direction.

On the other hand, an actuator 4 is mounted on a bracket 5, and its rotating shaft is connected to a drive shaft 6.

The drive shaft 6 is located below the pallet 1, supported by bearings 7a of guide blocks 7 arranged at appropriate intervals, and its axial direction is aligned with the conveyance direction of the pallet.

On this drive shaft 6, a positioning cam plate 8 whose portion is eccentrically mounted is mounted at each station (stop position) of the pallet.
b, and is attached via a key 9.

Since this cam plate 8 is mounted eccentrically as described above, when the actuator 4 rotates (rotates in one direction or rotates in forward and reverse directions), its outer circumferential orbit changes. The outer circumferential portion of the cam plate, that is, the outer circumferential portion 8a furthest from the shaft axis enters into the groove of the positioning portion 3 of the pallet 1 and engages with it.

In order to ensure smooth engagement at this time, tapered chamfered portions 10.10 may be provided on both sides of the outer peripheral edge of the cam plate.

In the device of the present invention having such a configuration, the pallet...
The positioning of ・is performed as follows.

First, as shown in FIG. 2, the eccentric positioning cam plate 8 is
While the pallet 1 is not engaged with the pallet 1, the pallet 1 is sent in the conveying direction by a fixed amount of movement by a piston cylinder device or the like as described above.

Although it depends on the error of the feeding device, the pallet 1 is now positioned at an approximate position.

At this time, the width direction of the pallet 1 is restricted by the guide rail 2,
2.

Next, the actuator 4 is rotated or rotated forward and backward.

Then, along with the drive shaft 6, the positioning cam plate 8
The pallet 1 rotates or rotates forward and backward in a kind of temporary position in the groove of the positioning part 3 of the pallet 1.
As the pallet rotates, it gradually enters and engages, and when it is completely inserted as shown in FIG. 2B, the position in the conveyance direction is regulated and the pallet 1 is smoothly positioned at a desired accurate position.

In this case, the chamfered portion 10.10 is formed on the cam plate 8 as described above.
By applying this, it is possible to easily absorb some deviation of the pallet 1.

For example, when feeding the pallet 1 using a piston cylinder device, etc., if there is an error of around ±5Wn in the conveyance direction,
If the thickness of the maximum cut portion of the chamfered portion 10.10 is set to about 5 mm, sufficient absorption can be achieved.

In the above embodiment, the positioning part 3 of the pallet 1
is a groove, and the outer peripheral part of the eccentric positioning cam plate 8 is inserted into this groove, but the present invention is not limited to this. For example, it is possible to provide a protrusion on the pallet as a positioning part and provide a groove on the outer peripheral surface of the cam plate in which the protrusion engages.

It is also possible to chamfer the grooves of the pallet to eliminate the need for the chamfered portion of the positioning cam plate.

Furthermore, although it depends on the timing with which the pallet is delivered by a piston cylinder device or the like, the drive shaft may be rotated intermittently by an actuator.

As is clear from the above description, according to the present invention, the pallet is provided with a positioning portion consisting of a groove or a protrusion;
Compared to conventional ones, it is constructed by attaching an eccentric positioning cam plate having an outer circumferential part that engages with the positioning part of the groove or protrusion to a single drive shaft rotated by a single actuator. Therefore, it is possible to provide an excellent pallet positioning device that can greatly reduce the number of parts and can position pallets at each station extremely smoothly.

[Brief explanation of the drawing]

FIG. 1 is a partially longitudinal side view showing an embodiment of a pallet positioning device according to the present invention. 2A and 2B are partial vertical cross-sectional views showing each driving process by the apparatus of FIG. 1. FIG. 1...Pallet, 3...Positioning section,
4... Actuator, 6... Drive shaft, 8... Positioning cam plate.

Claims (1)

[Scope of utility model registration request] a positioning part consisting of a groove or a protrusion provided on the bottom of the pallet in a direction intersecting the conveying direction thereof; a drive shaft supported by a bearing part of the device and extending in the conveying direction of the pallet; and an actuator for rotationally driving the shaft. ,
A pallet positioning device comprising: a positioning cam plate eccentrically attached to the movable shaft and capable of engaging with a positioning portion of the pallet.