JPS6289536A - Work reversing device - Google Patents

Abstract

PURPOSE:To reverse a work sheet by sucking the work sheet by a sucking pad and rotating a turning arm, by fixing several pieces of turning arms to a revolving shaft, attaching a horizontal bar provided with the sucking pad, to the tip of the turning arm, and constituting a four-node link. CONSTITUTION:A work sheet 1 which has been placed on a piling part 3 of a machine base 2 is sucked by a sucking pad 19. Subsequently, a motor 4 is driven, and a revolving shaft 5 is rotated clockwise in reverse to the previous time. As a result, a turning arm 6 which has been fixed to the revolving shaft 5 rotates clockwise together with the revolving shaft 5, a projecting part 7 of the turning arm 6 pushes up the lower end of a turning lever 11, and the turning lever 11 also rotates. Accordingly, a parallelogram constituted of a four-node link rotates centering around the revolving shaft 5 without changing its shape. Also, a horizontal bar 14 is rotated by 180 deg. in a state that the work sheet 1 has been sucked, and placed on a roller 27 of a conveyor 26.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a workpiece reversing device for reversing a worksheet by mechanical operation.

[Conventional technology 1 Shearing processes such as jarring, punching, and drilling are often performed in combination with other press processes, but these processes cause the worksheet 1 with holes 28 to have holes on the bottom surface. Since burrs 29 will appear, if you continue to bend the sheet as it is, the burrs 29 will come out and damage other equipment, worksheet 1, etc., and there is a risk of injury to workers, etc., as shown in Figure 6. lko.

For this reason, it was necessary to invert the worksheet 1 after operations such as cutting, punching, and punching, and then send it to the folding process.

[Problems to be Solved by the Invention] However, the work of reversing a worksheet as described above has conventionally been performed manually. If the worksheet is large and heavy, the work requires a lot of time and effort and is dangerous.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide an apparatus that can safely and reliably invert a worksheet h.

[Means for Solving the Problems] In order to achieve the above object, the present invention has a worksheet stacking section on one side of the machine base, a rotating shaft on the other side, and a number of worksheet stacks on the rotating shaft. A set of rotating arms is fixed, and a rotating lever shorter and smaller than each rotating arm is installed, and a horizontal bar equipped with several suction pads is attached to the tip of each rotating arm, and the upper end of the horizontal bar and the rotating lever are installed. It is connected to the upper end of the lever by a rod that forms a four-bar link.

Further, the rotating arm has a protruding portion at the base thereof that comes into contact with the rotating lever. The rotary lever has a spring that elastically presses the rotary arm against the protrusion, and has a stopper on the machine base near the rotary shaft support for determining a rotation limit of the rotary lever. There is.

Furthermore, a roller conveyor is installed near the machine base at the rotating arm reversal position to insert each rotating arm holding a workpiece and a horizontal bar into the roller gap.

[Operation] The worksheet on the top of the stack is attracted by the suction pad installed on the horizontal bar. The worksheet can be reversed 180 degrees by rotating several sets of rotating arms fixed to the rotating shaft while holding the worksheet in suction. Furthermore, when the rotating arm is inserted into the gap between the rollers of a roller conveyor installed near the machine base, the worksheet is placed on the roller, detached from the suction pad, and sent to other processes by the rotation of the rollers.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 4, one embodiment of the present invention is a worksheet 1 that has been punched, punched, etc.
are stacked on the worksheet stacking section 3 of the machine 2. A motor 4 is installed inside the machine base 2, and a rotating shaft 5 is attached near the motor 4.

Several sets of rotating arms 6 are attached to the rotating shaft 5.

This rotating arm 6 is made up of two pieces, and a convex part (key) is formed on the rotating shaft 5 at the attachment part of the rotating arm 6, and a part of the rotating arm 6 has a convex part. It is fitted into a hole 10 having a recess for fitting, and is fixed to the rotating shaft 5. The rotating arm 6 has a square shape, and a protrusion 7 is formed in the vicinity of where the rotating shaft 5 is fixed. This protrusion 7 is connected to the rotating arm 6
This is to maintain rotation of the horizontal bar 14 in the same direction during the reverse rotation. Further, a stopper 8 is formed by two rotating arms 6 near the fixed portion.

A wedge-shaped rotating lever 11 is provided between each set of rotating arms 6.
is loosely fitted onto the rotating shaft 5 through a loose hole 12. Further, the center 18 of a T-shaped horizontal bar 14 is rotatably attached to the tip 9 of the rotary arm 6. Several suction pads 1 are placed on the lower surface of the horizontal portion 15 of the horizontal bar 14.
9 is installed via a spring 20. A pipe 21 for letting air in and out of the suction pad 20 is installed at the center of the spring 20.

The upper end 17 of the vertical part 16 of the horizontal bar 14 and the rotating lever 11
A rod 22 connects the upper end 13 of the .

Vertical part 16 of horizontal bar 14, rotating arm 6, rod 2
2 and the upper half of the rotating lever 11 constitute a four-bar link.

Next, the effect will be explained.

The worksheet 1 that has been punched, punched, etc. is carried to a machine stand 2 and stacked on a worksheet stacking section 3.

First, in order to invert the worksheet 1, the horizontal bar 14 is lowered and adsorbed onto the suction pad 19, as shown by the solid line in FIG. For this purpose, the motor 4 rotates the rotating shaft 5 counterclockwise. A rotating arm 6 fixed to the rotating shaft 5 rotates together with the rotating shaft 5, and the tip 9 of the arm 6 gradually lowers. The lower end of the rotary lever 11, which is loosely attached to the rotary shaft 5, is pressed by a stopper 24, and is fixed at a vertical position without rotating counterclockwise. Horizontal bar 14 attached to the tip 9 of the rotating arm 6
is lowered as the rotating arm 6 rotates. At this time, since the rotating lever 11 is fixed, the rod 22 connecting the upper end 13 of the rotating lever 11 and the upper end 17 of the horizontal bar 14 rotates around the upper end 13 of the rotating lever 11.
Since the rotating arm 6 rotates around the rotating shaft 5, the opposing sides of the four-bar link shift while maintaining parallelism. Therefore, the vertical portion 16 of the horizontal bar 14 is kept vertical, and the horizontal portion 15 is lowered while also being kept horizontal.

In this way, since the horizontal bar 14 is lowered horizontally, all the suction pads 19 simultaneously move the worksheet 1 until there are no more worksheets, regardless of the number of worksheets 1.
It is designed to absorb. In addition, the rotating arm 6
A stopper 8 formed on the rotary arm 6 limits the range of rotation so that the rotary arm 6 does not descend too far.

When the horizontal bar 14 comes down, the worksheet 1 placed horizontally on the worksheet stacking part 3 of the machine base 2 moves to the horizontal bar 1.
4 comes into contact with a suction pad 19 installed on the lower surface of the device. The suction pad 19 is elastically supported by a spring 20,
Upon proper contact, rotation of the rotating shaft 5 is stopped and the tube 21
As a result, the air inside the suction pad 19 is removed to create a vacuum state, and the worksheet 1 is suctioned onto the pad 19.

When the worksheet 1 is suctioned by the suction pad 19,
Drive the motor 4 to rotate the rotating shaft 5 clockwise, contrary to the previous step. The rotating arm 6 fixed to the rotating shaft 5 rotates clockwise together with the rotating shaft 5, and the protrusion 7 of the rotating arm 6 pushes up the lower end of the rotating lever 11, causing the rotating lever 11 to move upward.
rotates in the same way.

Since the rotating arm 6 and the rotating lever 11 rotate together, the parallelogram formed by the four-bar link rotates around the rotation axis 5 without changing its shape.

The rotating arm 6 and the rotating lever 11 are elastically supported by a spring 23 so as to rotate together when rotating.

Due to the movement of the four-bar link, the horizontal bar 14 moves while rotating while holding the worksheet 1.

When rotated approximately 180 degrees in this manner, the stacked worksheet portion 3 is rotated relative to the rotation axis 5, as shown by the chain line in FIG.
The roller conveyor 2 is mounted on the frame 25 formed on the opposite side.
6 is formed, and each set of rotating arms 6
passes, and the worksheet 1 is placed on the roller 27. When the worksheet 1 is placed on the roller 27, the tube 2
1, air is sent into the suction pad 19 to detach the worksheet 1 from the suction pad 19.

The worksheet 1 stacked on the worksheet stacking section 3 has burrs 29 on the bottom surface due to the formation of the holes 28, but when it is placed on the roller conveyor 26, the worksheet 1 rotates 180 degrees. burr 29 is exposed on the top surface. The worksheet 1 placed on the roller 27 with the burr 29 facing upward is sent to the next process by the roller conveyor 26.

When the worksheet 1 with the burr 29 protruding upward is bent, the burr 29 goes inside as shown in FIG. 5, so the outside becomes a smooth surface, which is convenient.

Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to these embodiments.

[Effects of the Invention] As explained above, in the work reversing device of the present invention, several suction pads are installed on each of several sets of rotating arms, and the worksheet is suctioned by the suction pads. Since it is inverted, it requires no manpower and is not dangerous.

Furthermore, the worksheet has a four-bar link structure, so that the suction force of the worksheet is not affected by the hanging of the worksheet, resulting in stable workability.

[Brief explanation of drawings]

Figure 1 is a side view of this embodiment, Figure 2 is a plan view, Figure 3 is an exploded view of the rotating arm, Figure 4 is an enlarged view of the rotating arm, Figure 5 is an explanatory diagram of the worksheet, FIG. 6 is an explanatory diagram of a conventional example. 1... Worksheet, 2... Machine base, 3... Worksheet stacking part, 5... Rotating shaft, 6... Rotating arm,
7... Projection part, 11... Rotating lever, 14... Horizontal bar, 19... Suction pad, 22... Rod, 2
3... Spring, 24... Stopper, 26...
・Roller conveyor, 27...roller.

Claims (1)

[Scope of Claims] 1. The machine has a worksheet stack on one side, a rotating shaft on the other side, several sets of rotating arms are fixed to the rotating shaft, and each rotating arm is shorter and smaller than the other rotating arms. A rotating lever is freely mounted, a horizontal bar with several suction pads is attached to the tip of each rotating arm, and the upper end of the horizontal bar and the upper end of the rotating lever are connected by a rod forming a four-bar link. A work reversing device characterized by: 2. The workpiece reversing device according to claim 1, wherein the rotating arm has a protruding portion at its root portion that comes into contact with the rotating lever. 3. The rotating lever has a spring that elastically presses the rotating arm against the protrusion, and has a stopper on the machine base near the rotating shaft support that determines the rotation limit of the rotating lever. A work reversing device according to claim 1. 4. The worksheet reversing device according to claim 1, wherein a roller conveyor is installed near the machine base at the rotating arm reversing position to insert each rotating arm holding a workpiece and a horizontal bar into the roller gap.