JP3449530B2 - Turntable rotation mechanism of vertical molding machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turning mechanism of a vertical molding machine in which a die is installed on a turntable on a machine base.

[0002]

In this type of vertical molding machine, the rotary shaft centering on the turntable is rotatably supported on the fixed side by the machine base or the fixed plate on the machine base, and the fixed side. The machine base or the fixed board is configured to receive the mold clamping force applied to the turntable by the contact with the upper surface.

In order to reduce the frictional resistance at the time of rotation so that the turntable can be smoothly rotated, the turntable is provided so as to be able to move up and down together with the rotating shaft, although it has a slight dimension with respect to the fixed side. ing. Hydraulic pressure is generally used as the lifting means, and the lifting means is operated by operating a piston provided around or below the upper portion of the rotary shaft.

As a mechanism for rotating the rotating shaft by a motor, a hydraulic cylinder is installed in the upper center of the machine base, the rotating shaft is provided through the ram of the hydraulic cylinder, and the turntable is mounted on the ram. It is known to have a structure in which the ram of the hydraulic cylinder is placed or abutted on the lower end of the rotating shaft, but those rotating mechanisms have an unexpectedly complicated structure in the concrete structure, and the bearing and Difficulties also occurred in refueling the operating parts, and there was a problem in the positioning accuracy of the turntable.

The present invention has been conceived in order to solve the above-mentioned problems, and an object thereof is to improve the positioning accuracy of a turntable by integrating a rotary shaft and an output shaft, and to provide the rotary shaft. By using the piston as the piston and the bearing cylinder as the hydraulic cylinder, the rotating mechanism is simplified, and part of the lifting pressure oil is used as the lubricating oil for the bearings and the operating part to rotate the cylinder without any special lubrication. It is an object of the present invention to provide a turntable rotating mechanism of a vertical molding machine having a new structure capable of constantly maintaining good motion and lifting operation.

[0006]

According to the present invention according to the above object, a turntable on which a die is placed is fixed to a machine base or a fixed plate on the machine base, and a central rotating shaft is fixed to the fixed side. In a turntable rotation mechanism in which a bearing cylinder is rotatably supported by a bearing cylinder and a motor is connected to the rotation shaft,
The rotating shaft is provided in a bearing cylinder so as to be movable up and down by a bearing on a side portion, and between the bearing cylinder above and below the bearing and the rotating shaft, an upper oil chamber and a lower oil chamber using the rotating shaft as a piston. Is formed by applying a seal ring to the outer circumference of the rotating shaft, the motor is attached to the lower end of the bearing cylinder so that it can be moved up and down, the output shaft is inserted into the rotating shaft, and the output shaft and the rotating shaft are integrally connected. It will be done.

Further, according to the present invention, the pressure oil leaked from the upper oil chamber and the lower oil chamber is interposed as a clearance between the bearing cylinder and the rotating shaft and as lubricating oil for the bearing and the like, and the bearing cylinder is passed through the rotating shaft. It is configured to discharge as drain from the lower end of the.

Further, according to the present invention, while the rotating shaft is formed by a cylindrical body having one end with a locking edge inside, a protrusion is formed at one end of the output shaft, and the output shaft is fitted into the rotating shaft. The turntable is inserted to project the projection from the locking edge, and the center of the turntable is fitted into the projection to integrally couple the turntable, the rotary shaft, and the output shaft.

Still further, according to the present invention, the lower end peripheral edge of the bearing cylinder is formed into a flange, and a plurality of guide shafts are provided on the lower surface so that a motor flange fitted with a reduction gear is slidably mounted on the guide shaft. By fitting it, the reducer is housed in the lower end of the bearing cylinder, and the output shaft connected to the reducer is fitted and connected in the rotating shaft, and the motor is connected to the reducer and attached to the motor flange. The motor is installed at the end of a long side support plate that is attached to a connecting ring that fixes the free end of the guide shaft, and is connected to the transmission by a pulley and a timing belt. It is also that.

With the above construction, since there is no play in the fitting portion between the rotary shaft and the output shaft due to the integration of the rotary shaft and the output shaft, the positioning accuracy of the turntable is further improved.
Also, the pressure oil leaked from the oil chambers in the upper and lower parts intervenes as a lubricating oil in the clearance between the rotating shaft and the bearing cylinder and in the joint part, so the rotation and lifting of the turntable can be maintained for a long time without any particular refueling. It becomes possible to do.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION In the drawings, reference numeral 1 denotes a reciprocating (180 °) turntable of a vertical molding machine equipped with a rotating shaft 2 on the lower side of the center. Are placed at opposite positions on the upper surface. 3 is a machine base whose upper part also serves as a fixed platen, and a bearing cylinder 4 of the above-mentioned rotary shaft 2 is provided in the center.
However, the upper end is fitted vertically to the upper part of the machine base and is vertically provided by bolting, and the motor 5 by the servomotor is attached to the lower end side of the bearing cylinder 4.

The bearing cylinder 4 has a lid member 6 at the upper end.
The upper cylinder 7 and the lower cylinder 8 each having a lower end peripheral edge formed on a mounting flange 9 are fitted and bolted together. Inside the cylinders, stepped portions for bearing reception and oil chamber formation are formed at required locations, and oil holes 10 and 11 are provided on the side walls of the upper cylinder 7 and the lower cylinder 8 and the lower cylinder 8 is provided. Drain holes 12 are formed on the flanges.

The rotary shaft 2 is formed by integrally forming a flange 14 in the middle of a side portion of a shaft member having a cylindrical lower half and a protrusion 13 at an upper end. Further, an insertion hole for the bolt 15 is formed in the center of the inside, and a lateral hole is formed to connect to the insertion hole and form a leakage oil circulation hole 16.

Bearings 17, 18 and 19 which fit in the stepped portion inside the bearing cylinder are provided around the shaft above and below the flange 14 and below the flow passage 16, respectively. Multiple sided seal ring 2 on the side
0,20 is given. A clearance for raising and lowering the rotary shaft 2 is set between the bearing 18 and the step portion.

The rotary shaft 2 as described above is provided in each bearing 1.
7, 18 and 19 are provided in the bearing cylinder so as to be vertically movable, and between the bearing cylinder 4 above and below the bearing and the rotating shaft 2, the rotating shaft 2 is provided by the step portion and the seal rings 20 and 20. An upper oil chamber 21 and a lower oil chamber 22 having pistons as pistons are formed, and the pressure oil is alternately fed into the upper and lower oil chambers 21 and 22 from the oil holes 10 and 11 to turn the rotary shaft 2 into a turntable. It is designed so as to ascend or descend along with 1 by a required dimension.

The motor 5 includes a drive shaft 24 and a reducer 23.
Is attached to the flange 9 of the bearing cylinder 4. An output shaft 25 having a vertical drain groove 26 is connected to the speed reducer 23. The output shaft 25 is fitted into the lower portion of the rotary shaft 2 and is rotated by the bolt 15 to rotate the rotary shaft. It is combined with 2 together. As a result, the rotation speed of the motor 5 is reduced by the speed reducer 23 and output, and the output shaft 25 causes the rotation shaft 2 to rotate together with the turntable 1.

The speed reducer 23 is fitted on a motor flange 29 having a packing 28 around the fitting portion and is supported by the flange 9. A plurality of guide shafts 27 are screwed on the lower side of the flange 9.
The motor flange 29 is vertically movably inserted into the speed reducer 2
I am trying to support 3.

The free end of the guide shaft 27 is connected to the connecting ring 3.
0 is bolted and fixed, and the fixing ring 31 fixed to the motor 5 is housed in the connecting ring, and the motor 5 is bolted to the motor flange 29.
So that the motor 5 moves up and down together with the bearing cylinder 4
It is attached to. Further, the inside of the lower portion of the bearing cylinder 4 sealed by the fitting of the motor flange 29 is provided with the drain hole 1
2 and the drain groove 26 form an oil chamber 32 having an opening.

Assembling the rotary shaft 2 into the bearing cylinder and mounting it on the turntable 1 are carried out by first mounting the rotary shaft 2 with the bearings 17, 18 and the seal rings 20, 20 on the outer periphery. Insert into the upper cylinder 7 from the lower end. Next, the lower cylinder 7 is fitted into the rotary shaft 2, fitted into the upper cylinder 7, and bolted. A bearing 19 is fitted between the upper portion of the rotary shaft 2 and the upper cylinder 7 to close the cylinder opening by the lid member 6. As a result, the bearing cylinder 4 in which the rotary shaft 2 is housed is completed.

Next, the motor 5 is attached to the lower end of the bearing cylinder 4 together with the speed reducer 23, the output shaft 25 is fitted in the lower portion of the rotary shaft 2, and both are integrally connected by the bolt 15. As a result, the motor 5 and the speed reducer 23 move up and down together with the rotating shaft 2 in the working gap h set between the flange 8 and the motor flange 29.

After mounting the motor 5, the upper portion of the bearing cylinder 4 is fitted into the hole in the center of the machine base and bolted. By this attachment, the protrusion 13 of the rotary shaft 2 projects to the upper surface of the machine base. Therefore, the hole in the center of the turntable is fitted into the protrusion 13 to set the turntable 1 on the machine base, and the pin 33 is driven. Thus, the turntable 1 and the rotary shaft 2 are integrated.

FIG. 3 shows another mounting means for the motor 5 and the speed reducer 23 to the bearing cylinder 4. A long support plate 34 is attached to the connecting ring 30 and the end of the support plate 34 is attached. The motor 5 is installed in a section, and the motor 5 and the transmission 23 are connected by pulleys 35 and 36 and a timing belt 37.

FIG. 4 shows another embodiment of the rotating shaft 2 and the output shaft 25, in which the rotating shaft 2 has a locking edge 2a at one end.
Is formed by a cylindrical body having an inner side, and the output shaft 25 is formed by a large-diameter shaft material having a protrusion 25a at one end, and the output shaft 25 is fitted into the rotary shaft to lock the protrusion 25a. The turntable 1 is projected from the edge 2a, the center of the turntable 1 is fitted into the protrusion 25a, the turntable 1 and the rotary shaft 2 and the output shaft 25 are integrally connected by a pin 33, and the turntable 1 is further connected by a bolt 33a. And the rotating shaft 2 are integrally connected.

Reference numeral 38 in the drawing denotes a positioning pin which is attached to the tip of the piston rod of the air cylinder 39 so as to be fitted into the positioning hole 40 of the turntable 1 penetrating the upper part of the machine base. Reference numeral 41 is a stopper provided on the machine base side and is accommodated in a semicircular groove formed on the back side of the turntable 1. Further, although the illustrated embodiment includes the speed reducer 23,
In some cases, the drive shaft of the motor 5 can be directly connected to the output shaft 25 to rotate the rotary shaft 2.

In the rotating mechanism having the above structure, the rotation by the motor 5 is decelerated and transmitted to the output shaft 25, and the rotating shaft 2 rotates together with the turntable 1. When pressure oil is supplied from the oil hole 11 to the lower oil chamber 22, the rotary shaft 2 is hydraulically moved upward to separate the turntable 1 from the upper surface of the machine base. Conversely, pressure oil is supplied from the oil hole 10 to the upper oil chamber 21. When supplied, the rotary shaft 2 is lowered by hydraulic pressure and the turntable 1 comes into contact with the upper surface of the machine base.

The oil leaked from the lower oil chamber 22 passes through the clearance between the lower cylinder 8 and the rotary shaft 2 to the oil chamber 3 described above.
2, the pressure oil in the upper oil chamber 21 immerses the bearings 17 and 18 in the middle of the side portion, and the leaked oil further passes through the clearance between the upper cylinder 7 and the rotating shaft 2 and the bearing 19 at the upper end portion. It flows out to the oil chamber 32 from the flow passage 16 formed by the hole and the bolt hole, or the flow passage 16 formed by the clearance between the lateral hole and the rotating shaft 2 and the output shaft 23. The leaked oil merges in the oil chamber 32 and is discharged from the drain hole 12 of the flange 9.

From this, the oil leaked from the upper and lower oil chambers acts as lubricating oil by interposing in the clearance between the rotary shaft 2 and the bearing cylinder 4 or in the joint portion,
The clearance of the working part and the bearings 17, 18,
Since 19 is in a state of being refilled with the leaked oil, it is not necessary to refill the turning mechanism and the vertical movement even during long-term use, and it is possible to maintain the turning and raising / lowering of the turntable 1 for a long time.

Further, since the rotary shaft 2 and the output shaft 25 are integrally connected by the bolt 15 or the pin 33, the rotary shaft 2 and the output shaft 25 are fitted to each other, and only the rotary shaft 2 is turned. When moving up and down together with the table 1, the play of the fitting portion, which is inevitable, is eliminated, and the positioning accuracy is further improved.

[Brief description of drawings]

FIG. 1 is a partially longitudinal side view of a central portion of a machine base provided with a turntable rotating mechanism of a vertical molding machine according to the present invention.

FIG. 2 is a vertical cross-sectional view of the turntable rotating mechanism of the present invention, showing a side view in which a half of a rotating shaft is vertically cut.

FIG. 3 is a partially longitudinal side view of a central portion of a machine base provided with a turntable rotating mechanism according to another embodiment of the present invention.

FIG. 4 is a vertical cross-sectional view of another turntable rotation mechanism of the present invention, which is a side view showing a half of a rotation shaft in a vertical section.

[Explanation of symbols]

1 turntable 2 rotation axis 2a Locking edge 3 machines 4 bearing cylinder 5 motor 9 Lower cylinder flange 12 drain holes 14 Flange 15 volts 16 flow passage 17 Midway bearing 20 seal ring 21 Lower oil chamber 22 Upper oil chamber 23 reducer 25 Output shaft 25a protrusion 26 Drain groove 27 Guide shaft 29 Motor flange 32 oil chamber 33 pin 34 Support plate 35,36 pulley 37 Timing belt

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) B29C 33/34 B29C 33/20 B29C 45/06 B29C 45/67

Claims (5)

(57) [Claims] 1. A turntable for mounting a die is rotatably installed on a fixed side of a machine base or a stationary platen on the machine base, with a central rotating shaft supported by a bearing cylinder on the fixed side. Then
In a turntable rotating mechanism in which a motor is connected to the rotating shaft, the rotating shaft is provided in a bearing cylinder so as to be vertically movable by a bearing on a side portion, and the bearing is provided between the bearing cylinder above and below the bearing and the rotating shaft. , An upper oil chamber and a lower oil chamber having the rotating shaft as a piston are formed by providing a seal ring on the outer periphery of the rotating shaft, while the motor is attached to the lower end of the bearing cylinder so as to be vertically movable and the output shaft is inside the rotating shaft. A turntable rotating mechanism for a vertical molding machine, characterized in that the output shaft and the rotating shaft are integrally connected. 2. The pressure oil leaked from the upper oil chamber and the lower oil chamber is interposed as a clearance between the bearing cylinder and the rotating shaft and as lubricating oil for the bearing and the like, and the lower side of the bearing cylinder passes through the rotating shaft. The turntable rotation mechanism of the vertical molding machine according to claim 1, wherein the turntable rotation mechanism is configured to discharge the drain as a drain from the end. 3. The rotating shaft is formed of a cylindrical body having a locking edge inside and one end of the output shaft is formed, and the output shaft is inserted into the rotating shaft to project. 3. The part of the turntable is projected from the locking edge, and the center of the turntable is fitted to the projecting part to integrally connect the turntable, the rotary shaft, and the output shaft. Turntable rotation mechanism for vertical molding machine. 4. A bearing is formed at the lower end peripheral edge of the bearing cylinder into a flange, and a plurality of guide shafts are provided on the lower surface so as to project, and a motor flange fitted with a reduction gear is slidably inserted into the guide shaft, The reduction gear is housed in the lower end portion of the bearing cylinder, and the output shaft connected to the reduction gear is fitted and connected in the rotation shaft, and the motor is connected to the reduction gear and attached to the motor flange. The turntable rotating mechanism of the vertical molding machine according to claim 1 or 3. 5. The bearing cylinder has a lower end peripheral edge formed as a flange, and a plurality of guide shafts are provided on a lower surface of the bearing cylinder, and the free ends of the guide shafts are fixed by a connecting ring, and the connecting ring is laterally provided. 4. A long support plate is attached, the motor is installed at an end of the support plate, and the motor and the transmission are connected by a pulley and a timing belt. Turntable rotation mechanism for vertical molding machine.