JPS6354459B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an inversion work in which the workpiece is installed in a transfer line for a workpiece such as a press product, and the workpiece is lifted while being clamped and inverted vertically, and after being inverted, it is lowered and placed on the transfer line again. The purpose of the reversing machine that automatically performs this is to lift and reverse the workpiece using a single drive source, thereby reducing costs and making the overall configuration more compact.
Another object of the present invention is to allow lifting and reversing of the workpiece to be performed at the same time so that the reversal time of the workpiece is sufficiently long and to prevent deformation of the workpiece due to rapid reversal.

Conventionally, in this type of reversing machine, lifting and reversing the workpiece were performed using separate drive sources, which not only increased the size of the entire device and increased costs, but also increased the time required to lift and reverse the workpiece. Therefore, there is a problem in that sufficient time is not available for reversing the workpiece. In other words, since the time required for each process on the transfer line is fixed, the reversal of the work must be completed within the required time allotted to the reversing machine. If the reversing and reversing are performed separately in time, the time allotted for reversing the workpiece will be extremely short, which means that the workpiece will have to be rapidly reversed, which will prevent defects such as deformation during the reversal of pressed products and other workpieces. It is something that causes

Therefore, the present invention provides a useful reversing machine that can eliminate each of the drawbacks of the prior art.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be explained below based on embodiments shown in the drawings. FIG. 1 shows a front sectional view of the reversing machine, and FIG. 2 shows a side view. Reference numeral 1 denotes a reversing machine frame, and vertical frames 2, 2 are erected at both left and right ends. Each vertical frame 2 is provided with a guide rod 3, and a Jyo support member 4 is provided on the guide rod so as to be vertically movable. The jaw support member 4 has a jaw 5 for work clamping in its center.
is rotatably supported. On the other hand, a part of a motor 6 is mounted as a rotary machine on the machine frame 1, and the rotating shafts 8, 8 are connected from the motor 6 via a reducer 7 to a bearing case 9 provided near the vertical frames 2, 2. It has been extended to 9.

Reference numeral 10 denotes a swinging arm, the base end 10a of which is pivotally connected to the side wall of the bearing case 9 so as to be swingable. The swinging end 10b of this arm 10 is connected to the jaw support member 4 via a connecting rod 11. Further, the central position of the arm 10 is connected to the rotating shaft 8 of the motor via a crank mechanism consisting of a connecting rod 12 and a crank 13, and the arm 10 is swung by the rotation of the motor 6. It is configured to drive the Jyo support member 4 up and down.

A disk-shaped first bracket 14 is provided at the swing center 10a and the swing end 10b of the swing arm 10.
and a second bracket 15 are rotatably connected, and both brackets 14, 15 are connected by two parallel links 16, 16. Further, an arm 17 is attached to the work clamping jaw 5, and this arm 17 and the second bracket 1 are connected to each other.
5 and a double-angle link 18 as shown in FIGS. 2 and 3.
are connected by. That is, the Jyo support member 4
A long arm 19 is pivotally connected to the frame, and two parallel links 20,
At the same time, the elongated arm 19 and the arm 17 are connected by a link 21. Since the arm 19 is longer than the arm 17, when the arm 19 rotates by a predetermined angle, the arm 17 rotates by an angle inversely proportional to the ratio of the lengths. For example, if the length of the long arm 19 is to be twice that of the arm 17, if the long arm 19 is rotated by 90 degrees, the arm 17 and therefore the work clamping jaw 5 will be reversed by 180 degrees.
Of course, the ratio of the lengths of the arms 19 and 17 may be determined as appropriate so that when the first bracket 14 is rotated by a predetermined angle by a cam, which will be described later, the jaw 5 will rotate 180 degrees.

Next, the rotating shaft 8 to which the crank 13 is attached is provided with an elliptical cam 22 as shown in FIG. On the other hand, the trochanter 2 slidingly contacts the circumferential surface of the cam 22.
3 is the rod 24, the expansion lever 25, the link 26,
disc-shaped bracket 27, two parallel links 28,
The first bracket 14 is connected to the first bracket 14 via a cam 28, and the first bracket 14 is rotated by a predetermined angle (90 degrees in this example) by the movement of the rotor 23 in the radial direction of the cam as the cam 22 rotates. That's what I do. still,
The enlarging lever 25 is for enlarging the small amount of movement of the trochanter 23 and rotating the first bracket 14 by a predetermined angle. Therefore, if the amount of movement of the trochanter 23 is made sufficiently large by making the elliptical cam 22 large or by using one with a large eccentricity, there is no need for an enlargement lever. Further, if the trochanter 23 is arranged on a line connecting the first bracket 14 and the cam 22, the bracket 27 and the parallel links 28, 28 are unnecessary. Therefore, it is also possible to implement a configuration in which the trochanter 23 and the first bracket 14 are connected by a direct link.

According to the above configuration, when the rotating shaft 8 rotates once, the swing arm 10 swings once by the crank mechanisms 12 and 13, thereby causing the Jyo support member 4 to rise and fall once. . At the same time, cam 22
Since it rotates once, the first bracket 14 rotates by a predetermined angle in the positive direction, and then rotates by the same angle in the negative direction again, thereby causing the work clamping jaw 5 to rotate.
is reversed by 180 degrees, then rotated again by 180 degrees in the opposite direction to return to its original state. Here, by devising the circumferential shape of the elliptical cam 22, the work clamping Jyo 5 is reversed by 180 degrees from when the Jyo support member 4 starts rising until it descends, and the JYO support member 4 reaches the lowering end. If the workpiece clamping jaw 5 is rotated 180 degrees in the opposite direction before it starts to rise again, the workpiece clamping jaw 5 will clamp the workpiece A as shown by the chain line in Figure 3. It is possible to flip the workpiece while lifting it.

As explained above, in the reversing machine according to the present invention, the jyo support member 4 for rotatably supporting the jyo 5 for work clamping is provided on the vertical frame 2 so as to be vertically movable, and the jyo support member 4 is connected via the connecting rod 11. A part of the swing arm 10 is connected to the swing end 10b of the swing arm 10, and a part of the swing arm 10 is connected to the rotating machine 6 through the crank mechanisms 12 and 13, so that the rotation of the rotating machine moves the Jyo support member 4 up and down. On the other hand, a first bracket 14 and a second bracket 15 are rotatably attached to the pivot center 10a and the pivot end 10b of the pivot arm 10, respectively. and the second bracket 15 are connected by a link 16, an arm 17 is attached to the work clamping jaw 5, and a double angle link 1 is connected between the arm 17 and the second bracket 15.
8, and when the first bracket 14 is rotated by a predetermined angle, the workpiece clamping jaw 5 is configured to be reversed by 180 degrees, and is further mounted on the shaft 8 of the rotating machine 6 to which the clamping mechanisms 12 and 13 are attached. While the elliptical cam 22 is installed, the trochanter 23 is in sliding contact with the circumferential surface of the cam.
is connected to the first bracket 14 via a link, and the first bracket 14 is rotated by a predetermined angle by the movement of the rotor 23 in the radial direction of the cam as the cam 22 rotates. This has the following effects:

Since lifting and reversing of the workpiece can be carried out using the drive source of a single rotating machine, it is possible to significantly reduce costs by reducing the need for a drive source, which tends to be more expensive than other parts.
The overall configuration can also be made more compact.

By appropriately determining the circumferential shape of the elliptical cam, the workpiece can be lifted and reversed, and the time for reversing the workpiece can be set sufficiently long to prevent damage and deformation of the workpiece. .

[Brief explanation of the drawing]

The figure shows a reversing machine as an embodiment of the present invention,
FIG. 1 is a front sectional view, FIG. 2 is a side view, and FIG. 3 is a detailed view of the main parts of the reversing machine. 2... Vertical frame, 4... Jyo support member, 5... Jyo for work clamp, 6... Rotating machine, 8... Axis, 10... Swinging arm, 10a... Swinging center, 10b... Swinging end,
11...Connection rod, 12, 13...Crank mechanism,
14...first bracket, 15...second bracket, 16...link, 17...arm, 18...double angle link, 22...elliptical cam, 23...trochanter.

Claims (1)

[Claims] 1 A jyo support member 4 that rotatably supports a jyo 5 for work clamping is provided on the vertical frame 2 so as to be movable up and down, and this jyo support member 4 is attached to the swing end 10b of the swing arm 10 via a connecting rod 11. Connect a part of the swinging arm 10 to the crank mechanism 1
2 and 13 to the rotating machine 6, and is configured to drive the Jyo support member 4 up and down by the rotation of the rotating machine, while the swing center 10 of the swing arm 10
A first bracket 14 is rotatably attached to the swing end 10b, and a second bracket 15 is rotatably attached to the swing end 10b, and the first bracket 14 and the second bracket 15 are connected by a link 16. When the arm 17 is attached to the work clamping jaw 5, the arm 17 and the second bracket 15 are connected by a double angle link 18, and the first bracket 14 is rotated by a predetermined angle, the work clamping jaw 5 is rotated.
It is configured to rotate 180°, and the crank mechanism 1
The elliptical cam 22 is mounted on the shaft 8 of the rotating machine 6 to which the cams 2 and 13 are attached, and the trochanter 23 that slides on the circumferential surface of the cam is connected to the first bracket 14 via a link. Trochanter 2 with rotation of 22
A reversing machine characterized in that the first bracket 14 is rotated by a predetermined angle by the movement of the cam 3 in the radial direction.