JP3198149B2 - Rotary table rotating device - Google Patents

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 linear motion cylinder.

[0002]

2. Description of the Related Art As 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, a rotary table rotating device generally includes:
The rotary table is rotated via a reduction mechanism such as a gear using a hydraulic motor or an electric motor as a drive source.

[0003]

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

The present invention has been made to solve the above problems, and in particular, a rotary table in which a rotary table for moving a mold of a vertical injection molding machine is easily rotated by a linear motion cylinder. It is an object to provide a rotating device.

[0005]

A rotary table rotating apparatus according to the present invention is a rotary table rotating apparatus in which a mold of a vertical injection molding machine is mounted on a rotary table and moved. A drive arm fixed to a shaft, and a pair of direct-acting cylinders having rods supported by a common shaft support portion of the drive arm, wherein the rotary table is moved through the drive arm by one reciprocating operation of each rod. Is rotated by 180 degrees.

More specifically, each of the linear motion cylinders
In this configuration, they are arranged at the top and bottom of each other, and are arranged at a horizontal position at an interval from each other.

[0007]

In the rotary table rotating device according to the present invention, since the rods of the pair of cylinders are supported by the drive arm provided on the rotary shaft supporting the rotary table, each cylinder is operated to pull the rod. Can rotate the rotary table 90 degrees through the drive arm, and further push the rods to further rotate the rotary table 90 degrees through the drive arm.
Rotation by 180 degrees gives a total of 180 degrees rotation.
Further, when each rod is pulled again from the above-described state, the rotary table is rotated back by 90 degrees in the opposite direction to that described above, and is further rotated by 180 degrees in total by further pushing. By performing this operation alternately and continuously, a 180-degree reciprocating rotation of the rotary table can be obtained.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a rotary table rotating device according to the present invention will be described below in detail with reference to the drawings. 1 to 5 show a rotary table rotating device according to the present invention. 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 structural views of a main part showing a rotation process.

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

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

The cylinders 11 and 12 are vertically arranged on a bracket 13 fixed to the lower surface 1a at a peripheral position of the fixed platen 1 and are spaced apart from each other at a horizontal position. 1. Second pivot support 1
It is provided so as to be able to swing through 4 and 15.

Each of the tie bars 2, 3, and 4 has an upper mold 2
The upper movable plate 21 and the lower movable plate 22 each having zero are provided so as to move along the tie bars 2, 3, and 4. These movable plates 21 and 22 are provided with a mold clamping cylinder 23 provided on the fixed plate 1. Is configured to be moved by clamping.

Next, the operation of the rotary table rotating device according to the present invention in the above-described configuration will be described. First, as shown in FIG. 3, the drive arm 9 is moved from FIG. As shown in FIG. 4, the rotary table 7 rotates 90 degrees.

Next, in the state shown in FIG.
By actuating the rods 11a and 12a to the pushing side by operating the rods 1 and 12, the drive arm 9 is further rotated by 90 degrees as shown in FIGS. 4 to 5 to obtain a total of 180 degrees rotation of the rotary table 7. Can be.

In the state shown in FIG. 5, each rod 11a, 12
When a is actuated to the pull side, the state shown in FIG. 4 is obtained, and by further setting the rods 11a and 12a to the push side, the drive arm 9 returns to the original position as shown in FIG. be able to.

[0016]

Since the rotary table rotating device according to the present invention is configured as described above, the following effects can be obtained. That is, since the rotary table can be reciprocatedly rotated only through the pair of linear motion cylinders and the drive arm, the configuration is greatly simplified as compared with the conventional complicated configuration, and the configuration is simple and reliable. And a rotating device with a high power can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view showing an entire 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 Rotary shaft 7 Rotary table 8,8A Mold 9 Drive arm 10 Shaft support 11,12 Linear cylinder 11a, 12a Rod 30 Vertical injection molding machine

Continuation of the front page (56) References JP-A-1-115612 (JP, A) JP-A-1-115613 (JP, A) JP-A-3-7315 (JP, A) JP-A-61-173323 (JP) , U) JP 41-20719 (JP, B1) JP 43-7459 (JP, B1) JP 39-33745 (JP, Y1) JP 55-37373 (JP, Y1) (58) Field surveyed (Int. Cl. ⁷ , DB name) B29C 45/00-45/84 B23Q 5/26 B23Q 7/02

Claims (2)

(57) [Claims] 1. A rotary table rotating device in which a mold (8, 8A) of a vertical injection molding machine (30) is mounted and moved on a rotary table (7). A drive arm (9) fixed to a rotating shaft (6), and a rod supported by a common shaft support (10) of the drive arm (9)
(11a, 12a) and a pair of linear motion cylinders (11, 12), and the rotary table (7) is moved through the drive arm (9) by one reciprocating operation of the rods (11a, 12a). 18
A rotary table rotating device, wherein the rotary table rotating device is configured to rotate by 0 degrees. 2. The linear motion cylinders (11, 12) are arranged in a vertical position with respect to each other, and are arranged at a horizontal position with an interval therebetween. 2. The rotary table rotating device according to 1.