JP3701813B2 - Table rotating device and vertical injection machine having the rotating device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a table rotating device and a vertical injection machine having the rotating device.
[0002]
[Prior art]
Conventionally, as a table rotating device used for a vertical injection machine or the like, the configuration shown in FIG. 6 is generally employed. That is, in the figure, what is indicated by reference numeral 21 is a circular table on which a lower mold (not shown) is placed, and a large gear 22 is fixed to the lower part of the central axis of the table 21. The table 21 is rotatably mounted on a fixed platen 24 fixed to a bed 23. In the vicinity of the outer peripheral portion of the lower surface of the table 21, positioning holes 25 that define the stop position of the table 21 are provided at two locations facing each other. A drive actuator 27 that drives a small gear 26 that meshes with the large gear 22 and an actuator 29 that drives a positioning stopper 28 inserted into the positioning hole 25 are attached to the lower surface of the fixed plate 24.
[0003]
In the above configuration, the drive actuator 27 is driven, the rotational force is transmitted to the large gear 22 fixed to the table 21 via the small gear 26, the table 21 is rotated and moved to the stop position, and then the actuator 29 is driven. Then, the positioning stopper 28 is placed in the positioning hole 25 on the lower surface of the table for positioning.
[0004]
A center tie bar 31 is provided at the center of the central axis of the table 21, and two tie bars 32 are normally provided in the vicinity of the outer periphery of the fixed platen 24. A lower movable board 34 is fixed to the board 33 and the lower part. The lower movable platen 34 is attached to a mold clamping cylinder 35 fixed to the lower surface of the fixed platen 24, and the vertical movable plates 33 and 34 are moved up and down via the tie bars 31 and 32 by moving the piston of the cylinder 35 up and down. Move.
[0005]
[Problems to be solved by the invention]
Since the conventional table rotating apparatus is configured as described above, the size of the vertical injection machine and the like inevitably increases the size of the table, large gear, small gear, drive actuator, and the like, which are expensive. was there. In addition, a positioning stopper is required at the final stop position, which causes a cycle increase.
[0006]
It is an object of the present invention to provide a table rotating device that is inexpensive and has high positional accuracy even when the machine is enlarged, and a vertical injection machine having the rotating device.
[0007]
[Means for Solving the Problems]
The table rotating device according to the present invention includes a table, a transmitting means for transmitting the rotational force of the table rotating means to the table, both ends fixed to the outer periphery of the table, a positioning block provided on the lower surface of the table, and the positioning and a positioning means provided with a fine adjustment mechanism which faces the block, the fine adjustment mechanism includes a base block fixed to the bet, and a stopper that is screwed into the screw portion of the base block, the lock nut The stopper is configured to be fixed to the base block with a lock nut after the relative position with the positioning block fixed to the lower surface of the table is determined. The table rotating apparatus of the present invention, since the transmission means is fixed to the outer peripheral portion of the table can be increased reduction ratio, it can be applied vertical injection apparatus or the like is large.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described based on examples with reference to the drawings.
[0009]
FIG. 1 is a plan view of a table rotating apparatus showing an embodiment of the present invention, and FIG. 2 is a front view of FIG.
[0010]
1 and 2, what is indicated by reference numeral 1 is a circular table on which a lower mold (not shown) is placed. The table 1 is rotatably mounted on a fixed plate 3 fixed to the bed 2. A table rotating means 4 for driving the table 1 is attached to the bed 2. The rotating means 4 may be an electric servo motor or a hydraulic motor. However, the electric servo motor has advantages such as higher accuracy and easier control such as switching from high speed to low speed compared to the hydraulic motor.
[0011]
One end of a timing belt 6 as a transmission means is fixed to the outer periphery of the table 1 by a belt pressing means 7 in order to increase the reduction ratio, and the other end of the timing belt 6 is connected to a pulley 5 of the table rotating means 4. The belt pressing means 7a provided in the vicinity of the belt pressing means 7 is fixed to the outer peripheral portion of the table via the. Since the timing belt 6 is not made of metal, it has an advantage that it can be easily adjusted.
[0012]
A positioning block 8 that defines the stop position of the table 1 is provided in the vicinity of the outer peripheral portion of the lower surface of the table 1. Positioning means 9 provided with a fine adjustment mechanism facing the positioning block 8 is provided on the upper surface of the bed 2 so as to be opposed to two places.
[0013]
A center tie bar 31 is provided at the center of the table 1, and two tie bars 32 are normally provided in the vicinity of the outer periphery of the fixed platen 3. An upper movable plate 33 is provided above the tie bars 31, 32, and a lower portion thereof. Each of the lower movable plates 34 is fixed. The lower movable platen 34 is attached to a clamping cylinder 35 fixed to the lower surface of the fixed platen 3, and the vertical movable plates 33 and 34 are moved up and down via the tie bars 31 and 32 by moving the piston of the cylinder 35 up and down. Move. In the vertical injection machine, a lower mold is attached to the upper surface of the table 1, an upper mold is attached to the lower surface of the upper movable plate 33, and an injection device is attached to the upper surface of the upper movable plate 33.
[0014]
As shown in FIG. 3, the belt pressing means 7 and 7 a are considerably the same as the timing belt 6 in the rack 10 because the rack 10 and the belt presser 11 are fixed to the outer peripheral portion of the table 1. ing. When the timing belt 6 is fixed to the outer periphery of the table 1, the timing belt 6 is aligned with the rack 10, the timing belt 6 is sandwiched between the rack 10 by the belt presser 11, and the belt presser 11 is fixed by the bolt 12. .
[0015]
As shown in FIG. 4, the fine adjustment mechanism of the positioning means 9 includes a base block 13 fixed to the bed 2, a stopper 14 screwed into the female thread portion of the base block 13, a lock nut 15, The stopper 14 is fixed to the base block 13 with a lock nut 15 after the relative position with the positioning block 8 fixed to the lower surface of the table 1 is determined.
[0016]
Next, the operation of the table rotating device will be described.
[0017]
The table rotating means 4 is driven and the driving force is transmitted to the table 1 via the timing belt 6 to rotate in one direction. When the high-speed and low-speed deceleration control is performed by the rotating means 4 and the final stop position is reached, the positioning block 8 and the stopper 14 of the positioning means 9 are mechanically contacted to complete the positioning. Next, when the rotating means 4 is rotated in the reverse direction to rotate the table 1 in the reverse direction, and after reaching the final stop in the reverse direction through high speed and low speed deceleration control, the positioning block 8 and the stoppers 14 of the other positioning means 9 are mechanically moved. Positioning in the reverse direction is completed. By repeating this cycle, the table 1 is continuously rotated 180 degrees.
[0018]
In the above embodiment, the positioning means 9 is provided on the upper surface of the bed 2, but it may be provided on the upper surface of the fixed platen 3. 5A and 5B show a state in which the positioning means is provided on the upper surface of the fixed platen, where FIG. 5A is a partially broken plan view, and FIG. As shown in the figure, in this embodiment, since the positioning means 8 is provided between the table 1 and the fixed plate 3, the fixed plate 3 has a two-stage structure.
[0019]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
(A) Since the table outer peripheral portion is used for driving the table, the reduction ratio can be increased, and the table rotating device can be made inexpensive even if the machine is enlarged.
(B) Since it is not necessary to drive an actuator or the like for positioning the table, the cycle can be shortened. (C) The accuracy of the stop position of the table can be improved.
[Brief description of the drawings]
FIG. 1 is a plan view of a table rotating device showing an embodiment of the present invention.
FIG. 2 is a front view of FIG. 1;
3 is a detailed view of the belt pressing means shown in FIG. 1, wherein (a) is a plan view and (b) is a side view. FIG.
4 is a detailed view of a positioning block and positioning means shown in FIG.
FIGS. 5A and 5B show a state in which positioning means are provided on the upper surface of the fixed platen, where FIG. 5A is a partially broken plan view, and FIG.
FIG. 6 is a configuration diagram of a conventional table rotating device.
[Explanation of symbols]
1 Table 2 Bed 3 Fixed platen 4 Table rotating means 5 Pulley 6 Timing belt (Transmission means)
7, 7a Belt holding means 8 Positioning block 9 Positioning means 10 Rack 11 Belt holding 12 Bolt 13 Base block 14 Stopper 15 Lock nut

Claims (7)

A table (1), transmission means (6) for transmitting the rotational force of the table rotating means (4) to the table (1) fixed at both ends to the outer periphery of the table (1), and a lower surface of the table (1). Positioning block (8), and positioning means (9) provided with a fine adjustment mechanism facing the positioning block (8) ,
The fine adjustment mechanism includes a base block (13) fixed to the bed (2), a stopper (14) screwed into a screw portion of the base block (13), and a lock nut (15). The stopper (14) is configured and fixed to the base block (13) with a lock nut (15) after the relative position with the positioning block (8) fixed to the lower surface of the table (1) is determined. The table rotating device is configured to be configured as described above . The table rotating device according to claim 1, wherein the positioning means (9) is provided at two locations. The table (1) is rotatably provided on a stationary platen (3) fixed on the bed (2), and the positioning means (9) is provided on the bed (2). The table rotating apparatus according to claim 1 or 2, characterized in that: The table rotating device according to claim 3, wherein the positioning means (9) is provided on a stationary platen (3) instead of the bed (2). The table according to any one of claims 1 to 4, wherein the transmission means is a timing belt (6), and both ends thereof are fixed by belt pressing means (7, 7a), respectively. Rotating device. The belt pressing means (7, 7a) includes a rack (10) fixed to the outer peripheral portion of the table (1) and a belt presser (11) sandwiching the timing belt (6) between the rack (10). The table rotating device according to claim 5, wherein the rack (10) has the same gear cutting as the timing belt (6). A vertical injection machine comprising the table rotating device according to any one of claims 1 to 6.

Images