JPH0415697Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rectangular movement mechanism suitable for application to a component conveyance device that intermittently conveys a workpiece.

2. Description of the Related Art Conventionally, for example, a component conveying device that intermittently conveys a workpiece needs to drive an operator (feeding claw) in a rectangular shape. Therefore, in addition to the air cylinder for horizontal movement, another air cylinder is required to move the feed jaw up and down, which requires synchronized control between the two air cylinders, and the structure is relatively complex. There are certain drawbacks.

Furthermore, this feed claw has the disadvantage that it is unsuitable for transporting thin workpieces because it is structured to transport the workpiece in a state where it is hooked onto the workpiece.

In view of these points, the present invention has been developed to perform rectangular motion using only one air cylinder, and also to be able to transport even thin workpieces, with a rectangular motion that has a simple structure and eliminates the need for synchronization control. The main purpose is to propose a mechanism.

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a diagram showing an example in which the present invention is applied to a parts conveying device. 1 indicates the feed claw which is the motor;
The tip is covered with rubber 2. and feed claw 1
and a telescopic drive source such as a clevis type air cylinder 5.
and the slide shaft 6 provided above and parallel to this are the second working end 41 which is the other end of the L-shaped link 4, and the first working end 4 which is the central position, respectively.
2. It is connected to a rotation fulcrum 43 at one end by three connecting pins 7, 8, and 9 so as to be able to swing. The feed pawl 1, which is a motion element, is normally moved by a tension spring 3 provided between the feed pawl 1 and the L-shaped link, and by stoppers 10 and 11 so that the feed pawl 1 maintains an obtuse angle with the L-shaped link. Supported.

The entire L-shaped link 4 swings around a connecting pin 9 located at the tip of the slide shaft 6, and the connecting pin 8 located at the tip of the air cylinder 5 supports the swinging of the L-shaped link 4. Since this is the first point of action, the L-shaped link 4 swings between the stoppers 12 and 13 around the connecting pin 9 that is the fulcrum. As shown in FIG. 1, the stopper 13 is adjusted so that the vertical axis of the L-shaped link 4 is vertical when the air cylinder 5 is at its home position due to contraction. Adjustment is made so that the L-shaped link 4 can be locked at a certain angle in the clockwise direction due to extension, and the range of reversible movement of the L-shaped link 4 is restricted. This constant angle is determined by the vertical dimension to be set of the feed claw 1, which is the second working end. In this case, the stopper 12,
Reference numeral 13 is composed of a screw or the like and is configured to be expandable and contractible. Therefore, the L-shaped link 4 can also move horizontally along the bearing 14 as the slide shaft 6 moves due to the expansion and contraction of the air cylinder 5. The fixed side of the air cylinder 5 is rotatably supported by a fixed base 15 by a pin 16.

Next, to explain the operation of the present invention, assuming that the state shown in FIG. 1 is the original position of the device of this example,
The L-shaped link 4 and the feed claw 1 are connected to the air cylinder 5.
A counterclockwise force is applied by the retracting movement to the right in the figure, and the stopper 12 is in a locked state. From this state, as shown in FIG. 2, by gradually pushing out the rod 51 of the air cylinder 5 to the left in FIG. It begins to rotate clockwise.

Furthermore, by pushing out the rod 51, L
Immediately after the L-shaped link 4 comes into contact with the stopper 13, the entire L-shaped link 4 will move in parallel to the stroke end of the air cylinder 5, as shown in Fig. 4, and will stop when it reaches the stroke end. is locked. This state is defined as the stroke end position with respect to the origin.

Next, by gradually retracting the rod of the air cylinder 5 to the right from the stroke end state, the L-shaped link 4 rotates counterclockwise until it comes into contact with the stopper 13. In this case, work 14
When the feed claw 1 comes into contact with the stoppers 10 and 11, a distance l is left between the stoppers 10 and 11 (see Fig. 2). It will be transported by frictional force. Thereafter, the air cylinder 5 is driven parallel to the right to the original position, and returns to the original position shown in FIG.

Therefore, if we pay attention to the movement of the feed pawl 1 attached to the tip of the L-shaped link 4, the tip of the feed pawl 1 will follow a rectangular trajectory in this one stroke, and the reciprocating motion of the air cylinder 5 will be This operation can be repeated.

As described above, according to the present invention, one end of the L-shaped link is used as a rotation fulcrum, the central part of the L-shaped link is used as the first point of action, and the opposite end of the L-shaped link is used as the second point of action. , a telescopic drive source is connected to the first point of action, a motion element is connected to the second point of action, and a stopper for regulating the reversible rotation of the L-shaped link is provided near the pivot point. The movement of the second point of action is performed by only the single telescopic drive source, 2 as before
Synchronous control of the book's expansion/contraction drive source is not required, high-speed movement is possible, and the structure can be realized with a compact and simple configuration, which has the effect of being a low-cost type.

Further, according to the present invention, the telescopic drive source is a clevis-type air cylinder, the motion element is a feed pawl whose tip is covered with rubber, and the feed pawl is regulated by a stopper forming an obtuse angle with the L-shaped link. Since the obtuse angle between the feed claw and the L-shaped link is regulated by a spring, the feed claw is pulled by the spring, so even if the feed claw contacts the workpiece, there is no risk of damaging the workpiece. No matter how thin the workpiece is, it is held down from the top of the workpiece, making it possible to transport it.

Therefore, according to the present invention, it can be used to supply and take out workpieces to and from a press machine that requires high speed in a small space, and is particularly effective when applied to conveying thin workpieces.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the present invention; Fig. 2;
3 and 4 are diagrams for explaining the operation of the present invention, respectively. 1...Motor feed claw, 3...Spring,
4...L-shaped link, 5...Telescopic drive source (clevis type air cylinder), 6...Slide shaft,
7, 8, 9...Connection pin, 10, 11, 12, 1
3...Stoppa.

Claims (1)

[Claims for Utility Model Registration] 1. One end of the L-shaped link is used as a rotation fulcrum, and the central part of the L-shaped link is used as a first point of action,
The opposite end of the L-shaped link is a second working end, a telescopic drive source is connected to the first working point, and a second
A motion element is connected to the point of action of the L-shaped link, and a stopper for regulating the reversible rotation of the L-shaped link is provided near the rotation fulcrum, so that the motion element repeats rectangular motion by the reciprocating drive of the telescopic drive source. A rectangular movement mechanism characterized by being configured as follows. 2 The telescopic drive source is a clevis-type air cylinder, the motion element is a feed pawl whose tip is covered with rubber, the feed pawl is regulated by a stopper forming an obtuse angle with the L-shaped link, and the feed pawl and the above The rectangular motion mechanism according to claim 1, wherein the obtuse angle with the L-shaped link is regulated by a spring.