JPS6229176B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pallet attitude changing device in a transfer machine used, for example, in processing engine carburetors.

Conventionally, this kind of equipment has a plurality of processing stations arranged at appropriate intervals on a transfer line that intermittently transports a vertically-positioned pallet holding a workpiece in a removable manner to one side intermittently, and a plurality of stages of processing stations intervening therein to change the position. A method is known in which the workpiece is processed at the processing station and the pallet is changed in attitude at the conversion station. The pair of upper and lower guide rails that constitute the guide rail is generally composed of a pair of upper and lower fixed rails that are fixed at a predetermined height interval, and in such a type, the guide rail is supported between the pair of fixed rails. The pallet is blocked by the rails and cannot be rotated as it is; in other words, the pallet cannot be rotated, for example, by 90 degrees or 180 degrees while remaining in the vertical position. In this way, changing the posture of the pallet requires laying it down horizontally, which is disadvantageous in that the structure tends to be complicated.

The object of the present invention is to provide an apparatus free of such inconveniences, and a transverse transfer plate is installed on the side of a column extending in the transverse direction to intermittently transport pallets in a vertical position to one side while removably holding a workpiece. A plurality of machining stations are provided on the transfer line at appropriate intervals, and at least one posture changing station is interposed between the machining stations. In a conversion station for imparting an attitude change to a pallet, an actuation cylinder is provided on the side of the column facing the attitude station, the actuation cylinder having a piston sliding toward the transfer line, the piston of the actuation cylinder having: A slide connecting the upper and lower movable rails formed on the pair of upper and lower guide rails constituting the transfer line, which can be freely opened and closed, and connecting the clamp pawl that grips the pallet to open and close within the piston of the operating cylinder. It is characterized in that it is provided with a freely movable plunger and an actuating rod that houses the plunger and rotates within the piston.

An example of implementing the present invention will be explained with reference to the attached drawings. In the drawing, reference numeral 1 indicates a hollow column extending longitudinally in the lateral direction, and transfer lines 2, 2 on the upstream side and downstream side extend along the lower front side and the lower back side of the column 1. The pallet 4, which holds the workpiece a to be processed, is provided with transfer lines 3, 3 extending between the lines 2, 2 on the outside of each end thereof, and the pallet 4 holding the workpiece a to be processed is guided through the transfer line 2 on the upstream side to one side. Then, the downstream transfer line 2 was guided to the other side.

Since both transfer lines 2, 2 have approximately the same shape, below, we will mainly explain one of them, that is, the lower front transfer line 2. This line 2 has a pair of upper and lower guide rails 5, 5, and It consists of a transfer bar 6 that reciprocates along the
The pallet 4 is maintained in a vertical position with the workpiece a held in front of it and guided in one direction between the guide rails 5, 5, and processing stations 7 are arranged in multiple stages at appropriate intervals on the line 2. The pallet 4 is guided to the machining station 7, and the workpiece a on the front side is drilled by each vertical machining unit 9 above it. In addition to being subjected to other processing, it was guided to the conversion station 8 and rotated so that a predetermined attitude change was given.

In detail, the conversion station 8 includes a fourth
As clearly shown in the drawings and FIG. 5, the guide rails 5, 5 are separated and independent in the portion corresponding to the station 8, and are configured as movable rails 5a, 5a that can be opened and closed vertically, A support frame 10 is fixedly installed in the side wall of the column 1 on the back side, and an operating cylinder 11 having a fixed outer periphery is attached to the support frame 10, and an operating piston 12 that is moved forward by hydraulic pressure inside the support frame 10 or the like.
and a rotatable actuating rod 13 therein, and the rod 13 is connected to a rack 14 on the lower side thereof.
The rod 13 is connected via a gear train to a pinion shaft 16 having a pinion 15 that meshes with the piston 15, and the rod 13 is moved back and forth along with the working piston 12 and rotated along with the pinion shaft 16. The rod 13 further includes a plunger 17 which is moved back and forth by hydraulic pressure or other means, and a pair of clamp claws 18, 18 on the front surface thereof which open and close in conjunction with the plunger 17.
Thus, when the plunger 17 moves backward, the clamp claws 18, 18 close each other and clamp the boss 4a at the center of the back surface of the pallet 4, and the rod 13 is connected to the pallet 4. I made it so that Furthermore, the above-mentioned upper and lower movable rails 5a, 5
a is pivotally supported on the front surface of the above-mentioned support frame 10 via each support arm 5b, 5b, and is supported by upper and lower brackets 19 on the front surface of the above-described operating piston 12.
19 via respective links 20, 20, so that upon advancement of the piston 12, the bracket 1
9, 19, the links 20, 20, and the arm 5b,
5b, so that they are opened vertically to each other.

To explain its operation, a pallet 4 in a vertical position with a workpiece a to be processed on the front side is guided to one side on the transfer line 2, and the workpiece a is processed at each processing station 7, and its posture is changed. At the station 8, a rotation type attitude change is performed so that the surface of the workpiece a to be machined next faces upward.This attitude change will be described in more detail as follows. That is, for example, as shown in FIG. 4, the pallet 4 is placed on the upper and lower guide rails 5a,
The plunger 1 is maintained in a vertical position between 5a and
The upper and lower clamp claws 18, 18 are closed by the backward movement of the lever 7, and the pallet 4 is connected to the tip of the actuating rod 13.
When the pallet 3 is moved forward along with the operating piston 12 on the outer periphery, the pallet 4 is moved forward along with this, and at this time, the rails 5a, 5a are opened up and down accordingly, and the pallet 4 is moved forward. Next, when the rod 13 is rotated, the pallet 4 is rotated together with the workpiece a, and a rotational attitude change of, for example, 90 degrees or 180 degrees is given. . The state during this rotation is as shown in FIG. 1, for example. Next, after applying a predetermined rotation, the rod 13 is moved backward together with the piston 12, so that the pallet 4 returns to the position shown in FIG. 4, and the rails 5a, 5a close each other. Since it is in the state shown in the figure, when the plunger 17 is moved forward and the clamp claws 18, 18 are opened, the pallet 4 is disconnected from the rod 13 and is ready for the subsequent movement, that is, the next processing. Transport to station 7 is permitted. In this way, the next processing is performed on the upwardly facing surface of the workpiece a.

In this way, the present invention changes the posture of a pallet in a vertical posture, which has a workpiece to be machined on the front side, by rotating the pallet while maintaining its vertical posture. Processing can be carried out from above, in other words, it is sufficient for each processing station to have each vertical processing unit on its upper side, and the overall structure can be simplified. Further, its operation is sufficient by providing back-and-forth movement and rotation to the operating rod on the back side of the pallet, and the structure can be relatively simple and can be obtained at a low cost.

[Brief explanation of the drawing]

FIG. 1 is a front view of an example of a transfer machine equipped with the device of the present invention, FIG. 2 is a schematic plan view thereof,
FIG. 3 is a cross-sectional view taken along the - line, FIG. 4 is an enlarged cross-sectional side view of the main part, and FIG. 5 is a front view thereof. a...Work, 2...Transfer line, 4
... Pallet, 5, 5 ... Guide rail, 7 ... Processing station, 8 ... Posture conversion station,
5a, 5a...movable rail, 13...operating rod, 18, 18...clamp claw.

Claims (1)

[Claims] 1. A transfer line is provided on the side surface of a column extending in the horizontal direction to intermittently transport a vertical pallet holding a workpiece in a removable manner to one side, and on the transfer line, a plurality of processing stations at appropriate intervals and and at least one attitude changing station interposed between the processing stations so that each processing station processes the workpiece and the attitude changing station changes the attitude of the pallet, wherein the attitude changing station An actuating cylinder having a piston that slides toward the transfer line is provided on the side of the column facing the transfer line, and the piston of the actuating cylinder is provided with an upper and a lower guide rail formed on a pair of upper and lower guide rails constituting the transfer line. A slidable plunger that connects a movable rail that can be opened and closed and is connected to the piston of the operating cylinder to open and close the clamp claw that grips the pallet, and an operation that includes the plunger and rotates within the piston. What is claimed is: 1. A pallet attitude changing device in a transfer machine, characterized in that it is provided with a rod.