JPS639393Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to a mechanism for changing the posture of a conveyed object, and more specifically, it uses the reciprocating motion of a transfer bar to rotate a holding member of a conveyed object. The present invention relates to an attitude changing mechanism that moves an object to change its attitude.

[Prior art]

In general, a transfer machine is known as a system in which an object to be transported (workpiece) is fed from one end, dedicated units necessary for processing the work are arranged in the order of the processing steps, and each unit is connected by various transport devices. .

By the way, in the above-mentioned transfer machine, various operations such as conveyance of a conveyed object, clamp positioning, posture change, etc. are continuously performed.

However, in such conventional transfer machines, the various operations mentioned above are performed by individual drive mechanisms, which makes the device complex and makes it difficult to ensure synchronization with the transfer operation. In addition, the system for controlling each individual operation becomes complicated, requiring a dedicated area of the equipment and becoming more expensive.

Furthermore, by using separate devices for transport and attitude change, there is a limit to the reduction in transport time.

[Purpose of invention]

This invention was devised by focusing on the problems of the conventional methods, and its purpose is to provide a simple structure that allows the posture of the transported object to be changed safely and easily. This provides a mechanism for changing the posture of a conveyed object in a machine.

[Structure of the idea]

In order to achieve the above object, this invention fixes a cam plate to a transfer bar that moves in a rectangular motion (square motion) by a drive device, and provides a guide rod that can move up and down in a direction perpendicular to the transfer bar, and one end of this guide rod. A guide roller is provided for raising and lowering the guide rod by the rectangular movement of the cam plate, and the other end of the guide rod is connected to a reciprocally rotatable drum that is provided with a holding member that holds the conveyed object so that it can be carried in and taken out. This is a summary of what was done.

[Example of idea]

Embodiments of this invention will be described below based on the accompanying drawings.

FIG. 1 is a side view of one station of a transfer machine implementing this invention, and FIG. 2 is a front view thereof. A lift mechanism 2 is mounted on a machine platform 1 provided on the transport path of the object W to be transported. The lift mechanism 2 is swung by a drive device (not shown) and moves the transfer fiber 3 up and down. It is reciprocated in the horizontal direction, and this reciprocating movement and vertical movement create a rectangular movement, thereby performing one cycle of conveyance operation.

A gate-shaped support frame 4 that allows the transfer bar 3 to pass through is fixed on the machine base 1, and a U-shaped cross section that holds the transported object W so that it can be carried in and out is fixed to the support frame 4. A drum 6 with a holding member 5 is provided.

The drum 6 is supported by a plurality of guide rollers 7 attached to the support frame 4 so as to be rotatable back and forth about a point 0 on the conveyance path.

Then, by reciprocating this drum 6 by a predetermined rollover amount α°, the conveyed object held by the holding member 5 can be placed in two positions: an unloading position (Fig. 3) and a loading position (Fig. 5). It has started to make people change their posture.

Further, between the drum 6 and the fulcrum shaft 21 rotatably held by the support frame 4, there is a spring 8 that biases the drum 6 in a direction to prevent reverse rotation and is slidably supported by the fulcrum shaft 21. A lever 9 is provided.

In addition, a positioning dog 22 fixed to the drum 6 is connected to a stopper 22 fixed to the support frame 4.
3a and 23b to accurately determine the index position of the drum 6.

An attitude changing mechanism 10 is provided on the side of the transfer bar 3, and this attitude changing mechanism 10 includes:
As shown in FIGS. 3 and 4, a cam plate 12 having an endless cam groove 11 is attached to the lower part of the transfer bar 3, and a guide roller 13 that fits into the cam groove 11 of this cam plate 12 is attached. A guide rod 14 is provided therebetween and is disposed in a direction perpendicular to the transfer bar 3 so as to be movable up and down. This vertical movement of the guide rod 14 is performed by the rod 1.
6 and the drum 6 via a connecting bolt 15 to rotate the drum 6.

Further, the holding member 5 provided on the drum 6 includes a lower guide 17 that holds the lower surface of the transported object W.
A plurality of side guides 18 are provided to hold the side surfaces.

Note that the lower guide 17 and the side guide 18 are rotatable guide rails that are integrally formed with the drum 7.

19a and 19b are fixed side guides that are continuously arranged with a small gap between the front and rear ends of the guide rail, and support the sides of the transported object W and maintain different transport postures. . The front guide 19b maintains the transported object W in an unloading attitude, and the rear guide 19a maintains the transported object W in an incoming orientation.

Next, the operation of the embodiment of this invention having the above-mentioned configuration will be explained.

First, after the processing of the transported object is completed, the transported object W is moved to the station for changing the transported object posture shown in FIG.
is held in the unloading position as shown in FIG. 3 by a holding member 5.

The transfer bar 3 starts from its original position, which is the backward limit and lowered position as shown in FIG. 1, and begins the conveyance operation. In the original position of the transfer bar 3, the guide roller 13 provided at one end of the guide rod 14 is aligned with the cam groove 11 of the guide member 12.
The guide rod 14 is held at the upper limit by the spring 8, and the drum 6 is located at the third point P1.
It is maintained in the state shown in the figure.

From this state, when the transfer bar 3 is lifted by the lift mechanism 2, the guide roller 13
reaches point P2 of the cam groove 11, and at the same time, the conveyance claws 3a provided on the transfer bar 3 at predetermined pitches at intervals equal to the conveyance stroke are opposed so as to be able to engage with the back surface of the conveyed object W. Then, the transfer bar 3 is moved to the left in FIG. 4 by the feed cylinder 20 while in this raised position (see
X1 stroke amount in the diagram). At the same time, guide rod 14
The guide roller 13 provided at one end moves while being guided from point P2 to point P3 of the cam groove 11, and within this section, the conveying claw 3a moves toward the object W to be conveyed.
The conveyed object W is carried out from the guides 17 and 18 of the holding member 5, and is completely transferred to the fixed-side guide 19b in the front while maintaining the carrying-out posture. At this time, the drum 5 does not rotate, and the guides 17 and 18 are fixed to the holding member 5.
are aligned with the fixed side guide 19b on the delivery side. When the transfer bar 3 further moves to the left, the guide rod 14 is simultaneously lifted upward by the height difference h of the cam groove 11.

When the guide rod 14 is lifted upward, the drum 6, which is connected to the other end of the guide rod 14 and is equipped with a holding member 5 for the conveyed object W, is guided by the guide rollers 7 and rotates. At this time, the lever 9 uses the fulcrum shaft 21 as a fulcrum and the spring 8
(Roll over stroke amount α° of the drum 6 at X2 in FIG. 4).
When the rollover of the drum 6 is completed, the positioning dog 22 and the stopper 23a collide, and the guides 17 and 18 are accurately aligned with the fixed side guide 19a on the carry-in side, and the conveyed object in the carry-in attitude is moved from the guide 19a side. W is transformed into an acceptable state. At this time, the drum 6 is moved to the lever 9 as shown in FIG.
The spring 8 prevents clockwise rotation. Within this section, the transported object W
has already been handed over to the front guide 19b and has completely escaped from the rotation side guides 17 and 18, and the transported object W, which is guided by the rear guide 19a and carried in in the carry-in posture, is transferred to the rotation side. Guide 17, 18
The empty drum 6 has been moved to a position where it does not hang on the drum 6, and the empty drum 6 is now allowed to rotate. Subsequently, until the guide roller 13 moves while being guided from the point P4 to the point P5 of the cam groove 11, the next conveyed object W engaged with the conveying claw 3a of the transfer bar 3 is moved. This is when it is inserted into the holding member 5 (the fourth
X3 in the figure). Within this section, the forward conveyed object W that has been carried out is reliably carried to the next station, and the rear conveyed object W that is carried into the drum 6.
is guided by the guides 17 and 18 in the carrying position and is surely carried into the holding member 5.

The stroke movement amount (one stroke) of the transported object W in this embodiment is S, which is the sum of X1, X2, and X3, and the guide roller 13 is
Conveyance is completed by reaching 5 points.

Next, the forward movement of the transfer bar 3 in the horizontal direction is stopped at the position of point P5, and when the transfer bar 3 is lowered by the lift mechanism 2, P
Guide rollers 13 located at five points align with the cam groove 11.
moves from point P5 to point P6, and at the same time, the conveyance claw 3a is pulled down from the lower surface of the conveyed object W, and the conveyed object W is moved from the holding member 5 of the drum 6.
It is kept contained within.

From this state, the lift mechanism 2 is stopped and the transfer lever 3 is moved backward in the opposite direction (to the right in FIG. 4) by the feed cylinder 20 while in the lowered position. Guide roller 13
However, the cam groove 11 returns from point P6 to point P1 through point P7 and point P8, and at point P7 and point P8, the guide rod 14 descends and rotates the drum 6 counterclockwise α° from the state shown in Fig. 5. Then, the attitude of the workpiece W housed and held in the holding member 5 is changed to the unloading attitude as shown in FIG. At this time, the holding member 5
The guides 17 and 18 fixedly attached to the dispensing side are aligned with the fixed side guide 19b on the dispensing side. This attitude of the drum 6 is accurately determined by the abutment between the dog 22 and the stopper 23b, and the lever 9 and spring 8 prevent counterclockwise rotation.

As described above, while the guide roller 13 goes around the cam groove 11 from point P1 and returns to point P1 again, it is recommended to take out the transported object W from the holding member 5 and carry in the next transported object W. This completes one cycle.

In this way, the transfer bar 3 rises,
A rectangular motion of advancing, descending, and retreating is repeated, and in synchronization with this movement, the conveyed object W is carried out from the drum 6 in an unloading posture. After unloading, the drum 6 is rolled over and the conveyed object W is carried in in the loading posture. After receiving the object W and holding the object W, the drum 6 is rolled over in the opposite direction, and the series of operations of converting the object W to the unloading position is repeated.

[Effect of idea]

In this invention, a cam plate is fixed to a transfer bar that moves rectangularly by a drive device as described above, and a guide rod that can be raised and lowered in a direction perpendicular to the transfer bar is provided. A guide roller is provided that moves the guide rod up and down by movement, and the other end of the guide rod is connected to a reciprocating drum equipped with a holding member that holds the conveyed object so that it can be carried in and out. There is no need to provide a drive device for changing the attitude of the conveyed object separately from the drive device of the transfer bar device, and the configuration is simple, and there is an effect that the attitude of the workpiece can be reliably changed at the same time as conveyance.

In addition, since the posture change operation and the transfer bar operation are mechanically linked, synchronization is reliable and the transfer time is reduced.

Further, by holding and rotating a heavy object such as a cylinder block by the holding member and performing the movement and rotation operations separately, stable conveyance is possible and the risk of falling can be prevented.

[Brief explanation of the drawing]

Figure 1 is a side view of the workpiece posture changing mechanism in the transfer machine implementing this invention, Figure 2
The figure is a front view of Fig. 1, Fig. 3 is an enlarged front view of the attitude change mechanism (export attitude), Fig. 4 is a side view of Fig. 3,
FIG. 5 is a front view (carry-in attitude) showing the position of the attitude change mechanism to receive the transported object. 3... Transfer bar, 5... Holding member, 6
... Drum, 10 ... Attitude change mechanism, 12 ... Cam plate, 14 ... Guide rod, W ... Object to be transported.

Claims (1)

[Scope of utility model registration request] A cam plate is fixed to a transfer bar that moves in a rectangular manner by a drive device, and a guide rod that can be raised and lowered in a direction perpendicular to the transfer bar is provided, and a guide roller is provided at one end of the guide rod that raises and lowers the guide rod by the rectangular movement of the cam plate. What is claimed is: 1. A mechanism for changing the posture of a conveyed object, characterized in that the other end of the guide rod is connected to a reciprocally rotatable drum having a holding member for holding the conveyed object so as to be freely carried in and out.