JPH11310420A - Device for index rotation of large table - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for the index rotation device of a large table, capable of surely controlling the index rotation of the large table and maintaining a work environment in a good state in a simple structure comprising reduced parts by driving a pinion engaging with a large gear disposed on the outer periphery of the rotatably disposed large table with a servo motor through a speed reducer. SOLUTION: This device for the index rotation device of a large table is manufactured by attaching a support 2 onto a base 1, rotatably supporting a rotary table 4 on the support 2 through bearings 3, attaching a large gear 5 to the outer periphery of the rotary table 4, disposing members constituting a device for press-molding glass on the rotary table 4, disposing a serve motor 6 and its driving speed-reducing gear mechanism 7 on the base 1, attaching a pinion 9 to an output shaft 8, engaging the pinion 9 with the large gear 5, further disposing on the base 1 a cylinder 11 for vertically projecting a lock pin 10 as a lock mechanism, and disposing plural engaging holes 12 corresponding to the lock pin 10 on the lower surface of the large table 4 equally on the same circumference.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for rotating an index of a large table used for a large automatic rotating glass molding press machine or the like.

[0002]

2. Description of the Related Art The structure of an automatic rotary glass forming press machine equipped with an index rotating device for a large table is disclosed in Japanese Patent Publication No. Hei 8-505351. In this glass forming press machine, as shown in FIGS. 3 to 5, a column 21 is erected on a base 20, and a rotary large table 22 is rotatably fitted to the column 21. A glass forming press device 24 is provided on the upper part via a yoke 23.

[0003] The large table 22 has a large diameter of several meters, and a large inertia is generated at the time of rotation as the glass forming speed is increased. Therefore, a large rotation force and a large braking force are required to control the rotation. Therefore, a drive mechanism using a pair of trunnion type hydraulic cylinders 25 and 26 is incorporated.

The driving mechanism will be described. As shown in FIG. 4, a rotating arm 27 is provided below the large table 22 so as to rotate left and right about the column 21 as an axis. A pair of trunnion type hydraulic cylinders 25 and 26 are provided so as to be disposed on both sides of the section.

As shown in FIG. 5, each of the hydraulic cylinders 25 and 26 has a structure in which a sleeve 31 is provided in a housing 30 and a piston rod 32 is slidably housed in the sleeve 31. And a certain gap is secured between the housing 30 and the sleeve 31,
A plurality of through holes 33 are formed in the peripheral surface of the sleeve 31. Then, oil is supplied from the oil supply port 34 into the sleeve 31, and the piston rod 32 projects toward the tip end of the housing 30 by the oil pressure.

[0006] The piston rod 32 of one hydraulic cylinder 25 is connected to one side of the distal end of the rotary arm 27 via a pin 35, and the piston rod 32 of the other hydraulic cylinder 26 is connected to the distal end of the rotary arm 27. Is connected to the other side via a pin 36. A cylinder 38 is provided at the tip of the rotating arm 27 so as to protrude and retract the connecting pin 37.

In the operation of rotating the large table 22 by the index one pitch at a time, the connecting pin 37 is first projected by the driving of the cylinder 38 to engage in the engaging hole 37a formed in the lower surface of the large table 22. The large table 22 and the rotating arm 27 are connected via the pin 37.

Then, one of the hydraulic cylinders 25
Is driven, and the piston rod 3 of the hydraulic cylinder 25 is driven.
2 is projected, and the pivoting arm 27 pivots in one direction around the column 21 by this projecting operation, and the large table 22 is index-rotated by one pitch by this pivoting. At this time, the piston rod 32 of the other hydraulic cylinder 26 retreats, and the oil in the sleeve 31 of the hydraulic cylinder 26 flows out through the through hole 33 to the outer peripheral side by the retreating operation. Buffering at the time of stoppage is achieved.

After the large table 22 has been rotated by the index for one pitch and stopped, the connecting pin 37 is lowered by the driving of the cylinder 38 to disengage the large table 22 from the rotating arm 27. The cylinder 26 is driven, and the operation of the hydraulic cylinder 26 causes the rotation arm 2 to rotate.
7 returns to the starting position and prepares for the next index rotation.

[0010]

As described above, in the conventional index rotating device, a pair of hydraulic cylinders 2 are used.
The rotation and braking of the large table 22 are performed by using the wheels 5 and 26. However, in such a configuration, various various parts such as special hydraulic cylinders 25 and 26 and a rotating arm 27 are required, which complicates the structure, and the precision of manufacturing and assembling each part is strict. Required and frequent maintenance.

In particular, since the hydraulic cylinders 25 and 26 apply a braking force to the large table 22,
The gap between the sleeve 31 and the housing 30 in the housings 5 and 26 must be strictly controlled with high precision. If the gap is insufficient, problems such as seizure occur during high-speed operation. Furthermore, since oil is used, there is a problem that the working environment is deteriorated due to oil leakage, oil contamination, and the like.

The present invention has been made in view of such a point. It is an object of the present invention to control the index rotation of a large table with a simple structure having a small number of parts and to improve the working environment. An object of the present invention is to provide a large table index rotating device that can be maintained.

[0013]

In order to achieve the above object, the present invention provides a large table provided around a rotatable large table, a pinion meshed with the large gear, and a pinion. Is driven by a servomotor via a speed reduction mechanism to rotate a large table by an index.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a partially broken front view of the index rotating device.
Is a base, a support 2 is mounted on the base 1, and a large table 4 is rotatably supported on the support 2 via a bearing 3.
Is attached. Although not shown, components of a glass forming press are installed on the large table 4.

A servo motor 6 and a reduction gear mechanism 7 driven by the servo motor 6 are provided on the base 1. A pinion 9 is attached to the output shaft 8 of the reduction gear mechanism 7, and the pinion 9 meshes with the large gear 5 attached to the outer periphery of the large table 4.

Further, on the base 1, a cylinder 11 is provided as a lock mechanism for vertically moving the lock pin 10 up and down. On the lower surface of the large table 4, a plurality of engagement holes 12 corresponding to the lock pins 10 are provided so as to be evenly arranged on the same circumference of the large table 4.

Reference numeral 13 denotes a controller for controlling the servo motor 6, and reference numeral 14 denotes an operation panel for transmitting a predetermined signal to the controller 12. When the large table 4 is operated, the operation panel 14 is operated to drive the servomotor 6 via the controller 13. The rotational power of the servo motor 6 is transmitted to the pinion 9 via the reduction gear mechanism 7, and the rotational force of the pinion 9 is transmitted to the large table 4 via the large gear 9 to rotate the large table 4.

The large table 4 is large, having a diameter of several meters, and the total weight is considerably heavy when including the components of the glass forming press installed on the large table 4 and the accessories thereof. Its inertia is also large.

Therefore, if the large table 4 is to be started and stopped in a short time when it is rotating at a high speed, its rotating force and braking force become very large. According to the present invention, a large gear 5 is attached to the outer periphery of the large table 4, and the large gear 5 is engaged with a small-diameter pinion 9 having a reduced number of teeth as long as there is no problem in strength, and the large table 4 is driven by the pinion 9. Therefore, the rotation and braking of the large and heavy-weight large table 4 can be performed accurately.

The servo motor 6 is used as a drive source for the pinion 9, and the servo motor 6 is connected to the controller 13.
And the power of the servo motor 6 is transmitted to the pinion 9 via the reduction gear mechanism 7 having a large reduction ratio, so that the output capacity of the servo motor 6 can be reduced to facilitate the control. it can.

In the drive system using the servo motor 6, the stop position of the large table 4 when the large table 4 is stopped tends to move slightly or cause an error due to backlash or torsion of the shaft, but the large table 4 is stopped. Sometimes cylinder 1
1 operates to project the lock pin 10, and the lock pin 10 engages with the engagement hole 12 of the large table 4, whereby the large table 4 is reliably positioned at a predetermined position.

FIG. 2 shows an example of a sequence for controlling the large table 4 by using the servomotor 6. In this example, acceleration, constant speed, and deceleration of the large table 4 are performed in one second, followed by several seconds. One cycle including the stoppage of
This is an example of a case where this cycle is sequentially repeated.

[0023]

As described above, according to the present invention,
The drive system of the large table is simplified, the structure is simple and the number of parts can be reduced, and since the large table is driven by electrical control, maintenance is easy. There is no oil stain and the working environment can be kept good.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an index rotating device according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of control of index rotation by the index rotation device.

FIG. 3 is a front view showing a conventional index rotating device.

FIG. 4 is a plan view showing a main part of the index rotation device.

FIG. 5 is a sectional view showing a structure of a hydraulic cylinder used in the index rotating device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Base 2 ... Column 3 ... Bearing 4 ... Large table 5 ... Large gear 6 ... Servo motor 7 ... Reduction mechanism 8 ... Output shaft 9 ... Pinion 10 Lock pin 11 ... Cylinder

Claims (1)

[Claims] A large gear is provided on the outer periphery of a large table rotatably provided, a pinion meshing with the large gear is provided, and the pinion is driven by a servo motor via a speed reduction mechanism to index the large table. An index rotation device for a large table, which is rotated.