JPH0520509Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for taking out synthetic resin injection molded products.

[Prior art and its problems]

A special ejection device is used to eject synthetic resin injection molded products from the mold of an injection molding machine.
This take-out device has a take-out arm with a chuck attached to its tip, and the chuck enters between the opened molds and takes out the molded product. Here, there is a horizontal type in which the take-out arm rotates or moves horizontally and the chuck enters between the molds from the side, and a horizontal type in which the take-out arm moves laterally along the frame and the chuck moves in the vertical direction. There is a vertical movement type that enters between the molds from above. This vertical movement type has the advantage that the take-out device is installed on the injection molding machine, making effective use of the floor space around the injection molding machine, but the long air cylinder that moves the chuck up and down protrudes upward. , a factory with high ceilings is required. However, when injection molding molded products that are sensitive to dust, the molding is done in an air clean room with a low ceiling, which limits the length of the air cylinder, making it impossible to take the required stroke.

For this reason, two air cylinders are used, and the second air cylinder is attached to a relay plate that moves up and down by the first air cylinder fixed to the board.
If the chuck mounting plate to which the chuck is attached is moved up and down by the second air cylinder, the length of the air cylinder can be halved. At this time, in order to move the relay plate and chuck mounting plate accurately in the vertical direction without shaking, a long guide rod is attached to each.
This guide rod is held between bearings with a U-shaped cross section and moves up and down, but there is a limit to the size of the bearings, and in order to reduce weight, guide rods that are not very thick are used. Therefore, rigidity is insufficient. For this reason, the guide rod is fixed to the outer surface of a lightweight and highly rigid hollow reinforcing cylinder to compensate for the lack of rigidity of the guide rod. Therefore, in the case of such a two-stage vertical system, two air cylinders and two reinforcing cylinders with guide rods attached to the outer surface are required, and these occupy a large area, resulting in an increase in the size of the extraction arm. There is.

[Purpose of invention]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an injection molded product retrieval device that can be used in a factory with a short air cylinder and a low ceiling, and does not require an increase in the size of the retrieval arm.

[Structure of the idea and its effects]

The structure of the present invention is that the take-out arm has a chuck attached to its tip and moves up and down between opened molds, and one end moves along a frame that is attached above the injection molding machine and extends laterally. The extraction arm includes a substrate that moves along a frame, a first air cylinder that is vertically attached to the substrate, and a first air cylinder that is vertically attached to the substrate.
A relay plate attached to the tip of a first reinforcing tube fixed to a guide rod and moved up and down by a first air cylinder, a second air cylinder in a vertical direction that moves up and down together with this relay plate, and a second guide rod. and a chuck mounting plate that is attached to the tip of a second reinforcing tube fixed to the top and is moved up and down by a second air cylinder. It is characterized by being housed within a reinforced cylinder.

In other words, it is a two-stage vertical system that uses the first air cylinder and the second air cylinder to move the chuck mounting plate up and down via the relay plate, so the length of the air cylinder is halved, and the ceiling can be used as an air cleaner room. Although it can be used even in a factory where the temperature is low, the hollow first reinforcing tube and second reinforcing tube are one reinforcing tube housed within the other reinforcing tube, so they appear as one reinforcing tube. Therefore, the area occupied by the reinforcing cylinder is halved, resulting in a compact structure, and the take-out arm can be downsized.

〔Example〕

The present invention will be specifically described below based on embodiments shown in the drawings.

In FIG. 1, one end of a frame 11 is fixed above an injection molding machine 12, and the other end extends laterally. A base plate 31 of the take-out arm 10 is slidably attached to the frame 11, and when the air cylinder 13 is operated, it is moved laterally between a pair of stoppers 14 and 15 disposed opposite to each other. do. FIG. 2 shows a front view of the take-out arm 10, in which the first air cylinder 21 is fixed to the base plate 31 in a vertical direction. A relay plate 32 is fixed to the tip of the piston rod 23 of the first air cylinder 21, and to this relay plate 32,
The tip of the first reinforcing tube 41, which is arranged so as to be able to pass through the through hole of the substrate 31, is fixed, and when the first air cylinder 21 is activated, the first reinforcing tube 41 and the relay plate 3 are connected to each other.
2 or move up and down. The first reinforcing tube 41 has a hollow rectangular cross section, and is lightweight and has high rigidity. In addition, the first reinforcing tube 41 includes a second air cylinder 22.
is fixed, and the second air cylinder 22 moves up and down together with the first reinforcing cylinder 41 and the relay plate 32.A chuck mounting plate 33 is fixed to the tip of the piston rod 24 of this second air cylinder 22, When the air cylinder 22 operates, the chuck mounting plate 33 moves up and down. In other words, the chuck mounting plate 33 moves up and down via the relay plate 32 in a two-step up-and-down manner. The tip of the second reinforcing tube 42, which is arranged so as to be able to pass through the through hole of the relay plate 32, is also fixed to the chuck mounting plate 33. The second reinforcing tube 42 also has a hollow rectangular cross section, and is lightweight and has high rigidity. A chuck (not shown) is attached to the chuck mounting plate 33, and this chuck chucks the injection molded product ejected from the mold surface by the ejector, rises, travels sideways and descends, and transfers the injection molded product to the molding machine. Take it outside.

Therefore, as shown in FIG.
A first guide rod 51 is fixed to the outer surface of the second reinforcing tube 42, and a second guide rod 52 is fixed to the outer surface of the second reinforcing tube 42.
The first guide rod 51 and the second guide rod 52 are formed by bearings 61 and 62 fixed to the base plate 31 and having a U-shaped cross section.
When the first air cylinder 21 and the second air cylinder 22 operate, the first guide rod 51 and the second guide rod 52 move to the bearing 6.
Since the vertical movement is regulated by 1 and 62, the relay plate 3
2 and the chuck mounting plate 33 move up and down accurately without wobbling. The second reinforcing tube 42 having a smaller cross-sectional area is housed within the larger first reinforcing tube 41, and the second reinforcing tube 42 can move up and down within the first reinforcing tube 41. There is.

As shown in FIG. 3, when the first air cylinder 21 and the second air cylinder 22 operate and the piston rods 23 and 24 respectively extend, the stroke of the chuck mounting plate 33 changes between the first air cylinder 21 and the second air cylinder 22. This is the sum of the strokes of the two air cylinders 22, and even if the first air cylinder 21 and the second air cylinder 22 are short, the chuck mounting plate 33 can ensure a large stroke. Therefore, it becomes possible to shorten the first air cylinder 21 and the second air cylinder 22 that protrude upward. Further, the second reinforcing tube 42 is connected to the first reinforcing tube 4
1, the area occupied by the first reinforcing cylinder 41 and the second reinforcing cylinder 42 is halved, resulting in a compact structure, and the projected area of the take-out arm 10 can be reduced.

[Effects of the invention] As explained above, the injection molded product take-out device of the present invention has a two-stage vertical system in which the chuck mounting plate of the take-out arm moves up and down via a relay plate, and the guide rod is reinforced. Since one of the two reinforcing cylinders is housed inside the other, the air cylinder has a short length and can be used in a factory with a low ceiling, and the injection molded product ejecting device can also be made with a small ejecting arm.

[Brief explanation of the drawing]

Figure 1 is a front view of the embodiment of the present invention, Figures 2 and 3 are
The figure is a partially cutaway front view of the extraction arm.
The figure is a sectional view taken along the - line in FIG. 2. 10...Take-out arm, 11...Frame, 12
... Molding machine, 21 ... First air cylinder, 22
...Second air cylinder, 31...Substrate, 32...
...Relay plate, 33...Chuck mounting plate, 41...First reinforcing plate, 42...Second reinforcing plate, 51...First guide rod, 52...Second guide rod, 61, 62...Bearing.

Claims (1)

[Scope of Claim for Utility Model Registration] A take-out arm, which has a chuck attached to its tip and moves up and down between opened molds, has one end attached above the injection molding machine and runs along a frame extending laterally. A moving injection molded product take-out device, wherein the take-out arm includes a substrate that moves along a frame, a first air cylinder that is vertically attached to the substrate, and a first air cylinder that is fixed to a first guide rod. A relay plate attached to the tip of the reinforcing tube and moved up and down by a first air cylinder, a second vertical air cylinder that moves up and down together with the relay plate, and a second reinforcing tube fixed to the second guide rod. and a chuck mounting plate that is attached to the tip of the cylinder and moved up and down by a second air cylinder, and the first reinforcing cylinder and the second reinforcing cylinder are arranged such that one reinforcing cylinder is housed in the other reinforcing cylinder. An injection molded product removal device characterized by the following.