JPH05293847A - Device for rotating rotary table - Google Patents

Abstract

PURPOSE:To simply rotate the rotary table for moving the mold of a vertical injection molding machine by a direct-acting cylinder. CONSTITUTION:A rotary table rotating device is equipped with the drive arm 9 fixed to the rotary shaft of a rotary table and a pair of direct-acting cylinder 11, 12 having the rods 11a, 12a supported by the common shaft support part 10 of the drive arm 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary table rotating device, and more particularly to a novel improvement for easily rotating a rotary table for moving a die of a vertical injection molding machine by a direct acting cylinder.

[0002]

2. Description of the Related Art Conventionally, a rotary table rotating device for rotating a rotary table for moving a mold of a vertical injection molding machine of this type, which has been conventionally used, is generally:
A hydraulic table or an electric motor is used as a drive source, and a rotary table is rotated through a speed reducing mechanism such as a gear.

[0003]

Since the conventional rotary table rotating device is constructed as described above, the following problems exist. That is, the rotating mechanism is complicated, and a device for controlling the rotation is large in order to increase the rotating speed.

The present invention has been made to solve the above problems, and in particular, a rotary table for moving a die of a vertical injection molding machine can be easily rotated by a direct acting cylinder. An object is to provide a rotating device.

[0005]

A rotary table rotating device according to the present invention is a rotary table rotating device in which a die of a vertical injection molding machine is placed on a rotary table and moved. The rotary table is provided with a drive arm fixed to a shaft and a pair of linear motion cylinders having a rod pivotally supported by a common pivot portion of the drive arm, and one reciprocating motion of each rod causes the rotary table to pass through the drive arm. Is configured to be rotated 180 degrees.

More specifically, each of the linear motion cylinders is
It is arranged such that they are arranged at the upper and lower positions, and at the same time, they are arranged at intervals in the horizontal position.

[0007]

In the rotary table rotating device according to the present invention, the rods of the pair of cylinders are pivotally supported by the drive arm provided on the rotary shaft that supports the rotary table. Therefore, each cylinder is operated to pull the rod. The rotary table can be rotated 90 degrees via the drive arm, and the rotary table can be rotated further 90 degrees via the drive arm by pushing each rod.
It is possible to obtain a total of 180 degrees of rotation by rotating it once.
Further, when each rod is pulled again from the above-mentioned state, the rotary table rotates 90 degrees in the opposite direction to the above and returns, and by further pushing, the rotary table rotates a total of 180 degrees and returns. By performing this operation alternately and continuously, 180 ° reciprocating rotation of the rotary table can be obtained.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a rotary table rotating device according to the present invention will be described in detail below with reference to the drawings. 1 to 5 show a rotary table rotating device according to the present invention, and FIG. 1 is a side view showing the entire structure,
FIG. 2 is a sectional view taken along the line BB of FIG. 1, and FIGS. 3 to 5 are explanatory configuration diagrams of a main part showing a rotating process.

First, what is denoted by reference numeral 1 in FIGS. 1 and 2 is a fixed plate fixed by a plurality of tie bars 2, 3 and 4, and is rotatably provided on the tie bar 2 via a rotary bearing 5. The rotary shaft 6 penetrates the fixed plate 1 in a freely rotatable state, and the rotary table 7 provided on the upper end of the rotary shaft 6 is rotatably arranged on the fixed plate 1.

A plurality of replacement lower molds 8 and 8A are placed on the rotary table 7, and a drive arm 9 having a substantially elliptical shape in plan view is provided at a lower position of the rotary shaft 6. Are integrally provided, and rods 11a and 12a of a pair of linear motion cylinders 11 and 12 are operably connected to a common shaft support portion 10 provided at one end 9a of the drive arm 9 in a vertical position. ..

The cylinders 11 and 12 are arranged in a vertical position on a bracket 13 fixed to the lower surface 1a at the peripheral position of the fixed platen 1, and are spaced apart from each other at a horizontal position. 1, second shaft support 1
It is provided to be swingable through 4, 15.

The upper die 2 is attached to each of the tie bars 2, 3 and 4.
An upper movable plate 21 and a lower movable plate 22 having 0 are provided so as to move along the tie bars 2, 3 and 4, and each of these movable plates 21 and 22 is a mold clamping cylinder 23 provided on the fixed plate 1. The mold clamping movement is performed by.

Next, the operation of the rotary table rotating device according to the present invention having the above-mentioned structure will be described. First, as shown in FIG. 3, the drive arm 9 is moved from FIG. 3 by operating the rods 11a and 12a of the linear motion cylinders 11 and 12 provided on the fixed platen 1 of the vertical injection molding machine 30 to the pulling side. As shown in FIG. 4, it rotates 90 degrees, and at the same time, the rotary table 7 also rotates 90 degrees.

Next, in the state of FIG. 4, each linear motion cylinder 1
By operating the rods 1 and 12 to move the rods 11a and 12a to the push side, the drive arm 9 is further rotated 90 degrees as shown in FIGS. 4 to 5, and the rotary table 7 is rotated 180 degrees in total. You can

In the state shown in FIG. 5, the rods 11a and 12 are again passed through the linear motion cylinders 11 and 12, respectively.
When a is actuated to the pulling side, the state shown in FIG. 4 is obtained, and by further setting the rods 11a and 12a to the pushing side, the drive arm 9 returns to the original position as shown in FIG. 3, and reverse rotation of the rotary table 7 is obtained. be able to.

[0016]

Since the rotary table rotating device according to the present invention is constructed as described above, the following effects can be obtained. That is, since the rotary table can be reciprocally rotated only through the pair of linear motion cylinders and the drive arm, the structure is greatly simplified as compared with the conventional complicated structure, and the structure is simple and reliable. It is possible to obtain a high rotation device.

[Brief description of drawings]

FIG. 1 is a side view showing an overall configuration of a rotary table rotating device according to the present invention.

FIG. 2 is a sectional view taken along line BB of FIG.

FIG. 3 is an explanatory configuration diagram of a main part showing a rotation process.

FIG. 4 is an explanatory configuration diagram of a main part showing a rotation process.

FIG. 5 is an explanatory configuration diagram of a main part showing a rotation process.

[Explanation of symbols]

 6 Rotation axis 7 Rotary table 8,8A Mold 9 Drive arm 10 Shaft support 11,12 Linear cylinder 11a, 12a Rod 30 Vertical injection molding machine

Claims (2)

[Claims] 1. A rotary table rotating device in which a die (8, 8A) of a vertical injection molding machine (30) is placed on a rotary table (7) and moved, wherein the rotary table (7) A drive arm (9) fixed to a rotating shaft (6) and a rod pivotally supported by a common shaft support (10) of the drive arm (9).
A pair of linear motion cylinders (11, 12) having (11a, 12a), and the rotary table (7) via the drive arm (9) by one reciprocating motion of each rod (11a, 12a). 18
A rotary table rotating device characterized by being configured to rotate 0 degree. 2. The direct-acting cylinders (11, 12) are arranged in a vertical position with respect to each other, and are arranged in a horizontal position with a space therebetween. 1. The rotary table rotating device according to 1.