JPH1043889A - Interlocking mechanism for press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an interlocking mechanism that can brake plural presses individually while driving them with a single motor. SOLUTION: The interlocking mechanism 21 for a press is assembled with a motor 22 and a reduction gear 25. This reduction gear 25 is provided with multiple output shafts 25a, which are each equipped with an output pulley 27; a ball screw nut part 29 having a braking device 23 is provided with a pulley 28 for driving the ball screw. In addition, the pulleys 26, 28 are connected with a belt 26a, 26a' while a clutch 27 is assembled with each output pulley 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ball screw nut provided between a platen and a table, and a ball screw nut is provided at the center of the table so as to penetrate the ball screw nut. The present invention relates to an interlocking mechanism for a press machine in which a tip end of a ball screw is connected to a mold clamping mechanism and clamps the mold, wherein a platen of a plurality of presses is moved up and down by one drive motor.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional example of this type. That is, one drive motor 2 is made to correspond to one press machine 10, and pulleys 3 and
4, a belt 5 is provided between the pulleys 3 and 4, and the press machine 10 is driven by the drive motor 2.

Therefore, braking of the drive mechanism 1 of the press machine 10 is generally performed by an electromagnetic brake 6 incorporated in the motor 2.

That is, as shown in FIG. 5B, the electromagnetic brake 6 has a field core 6a as a stationary portion provided between an output side end plate 6A and a motor side hub 6B. A spring 6b is inserted at the center, and a donut-shaped electromagnetic coil 6c is provided around the outer periphery of the spring 6b.
Is inserted. Then, a circular armature 6d is provided at a position facing the field core 6a in which the magnetic coil 6c is inserted, so that the circular hub 6B fixed to the motor shaft 6f faces the brake lining 6e. It has a built-in structure.

When a current flows through the electromagnetic coil 6c, the armature 6d is attracted, the spring 6b is returned, and a clearance is created between the armature 6d and the brake lining 6e, so that the motor shaft 6f becomes free. Then, when the electricity stops flowing to the electromagnetic coil 6c, the armature 6d is pressed against the surface of the brake lining 6e by the spring 6b, and the hub 6B to which the motor shaft 6f is fixed is braked so that the brake is applied.

[0006]

However, in such a conventional apparatus, since the press machine 10 is braked by the electromagnetic brake 6 provided on the motor 2, a single press machine 10 can be used. Thus, although one motor 2 can be braked freely, there is a problem that a large number of presses cannot be accurately and separately braked by a single motor.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an interlocking mechanism for a press that enables a plurality of presses to be individually driven while allowing a plurality of presses to be driven by a single motor.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, a mold clamping mechanism is provided between a platen and a table, and is penetrated through a central portion of the table. Providing a ball screw nut, screwing the ball screw nut to provide a ball screw, connecting the ball screw tip to the mold clamping mechanism, connecting the ball screw nut to a motor via a pulley and a belt, In a press machine that drives the motor to operate the mold clamping mechanism to move the platen up and down, the motor and a speed reducer are assembled and provided, and the speed reducer is provided with a plurality of output shafts. An output pulley is provided on the output shaft, and a ball screw driving pulley is provided on the ball screw nut portion having a braking device. The pulleys are connected via the belt, and the output pulley is assembled with the output pulleys. Give and is characterized in that a clutch.

In such a case, a plurality of presses can be driven by one motor. Then, the output shaft of the speed reducer and the pulley can be attached and detached by operating the clutch, and the start and stop can be freely performed for each press as needed. At the same time, braking can be applied to each press.

According to a second aspect of the present invention, a mold clamping mechanism is provided between the platen and the table, and the ball screw nut is provided so as to penetrate a center portion of the table. Provide the ball screw together
The ball screw tip is connected to the mold clamping mechanism, the ball screw nut is connected to the motor via the pulley and the belt, and the motor drives the mold clamping mechanism to operate the platen. In the press machine that moves up and down, a main shaft pulley is inserted and provided on a main shaft of the motor, and a ball screw driving pulley is provided on the ball screw nut portion having a braking device. And a clutch is provided in combination with each of the ball screw driving pulleys.

In such a device, a plurality of presses can be driven by one motor. By operating the clutch, the ball screw driving pulley of the press machine and the pulley can be attached and detached, and the start and stop can be freely operated for each press machine. At the same time, braking can be applied to each press.

[0012] The invention described in claim 3 is characterized in that the braking device is provided for each of the press machines.

In such a device, even if a plurality of press machines are provided for one motor, each press machine has a braking force, so that it is not necessary to brake the press machine by the motor.

[0014] The invention described in claim 4 is characterized in that the braking device is a disc brake.

In this case, a large braking force can be obtained, and the driving can be stopped accurately.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An interlocking mechanism for a press machine according to an embodiment of the present invention will be described with reference to the drawings.

[0017]

First Embodiment FIG. 1 shows a first embodiment of the present invention.
A description will be given based on FIG. 3 and FIG.

In FIG. 1, reference numeral 21 denotes an interlocking mechanism for a press machine. In this embodiment, two press machines 30, 30A and one motor 22 are provided as an example.

Further, the interlocking mechanism 21 for the two press machines is used.
A braking device 23 is provided at a lower part of the vehicle. This braking device 2
Reference numeral 3 denotes a disk 23a and a caliper 23b which encloses the disk 23a.

A reduction gear 25 is connected to the main shaft 24 of the motor 22 via a coupling 24a, and two output shafts 25a are provided from the reduction gear 25. Each of the two output shafts 25a has a pulley. 26 is inserted and provided.

A ball screw driving pulley 28 is also provided below the ball screw nut 29 which is the mold clamping mechanism 31, and a belt 26a and a belt 26a are respectively connected between the output pulley 26 and the ball screw driving pulley 28. 26a ', and are connected and drivable (see FIG. 1B).

Further, as shown in FIG.
6 is provided with a clutch 27 assembled.

The clutch 27 is composed of a field core / rotor assembly and an armature hub assembly (rotating portion) in which a rotor 27c (rotating portion) and a field core 27d (stationary portion) are supported by a bearing 27e and integrated. The armature 27b is assembled integrally with the pulley 26 via a bolt 27f.

Therefore, by exciting the coil 27a, the armature 27b is attracted by the rotor 27c and can rotate integrally with the pulley 26. When the excitation is stopped, the magnetic flux disappears, and the armature 27b is driven by the force of the leaf spring 27g. And the clutch 27 is released.

In the system configuration shown in FIG.
The system of one press machine 30 having one motor 22 is used to drive a plurality of press machines 30 and 30A by one motor 22.
In order to make the system movable, it is possible to achieve a common system configuration by integrally connecting with the interlocking mechanism 21 for the press machine.

That is, the control unit including the setting screen, the sequence controller, and the press controller can be commonly used by the two press machines 30, 30A with the same device.

The same driver unit can be used in common for the motor and the motor driver.

Therefore, as for the system configuration, the same hardware device is used for one unit, and the software is based on a press machine program for one unit.
A common structure can be achieved simply by connecting the bases so as to be activated in accordance with the operation phase between a plurality of presses.

Therefore, with such a configuration, by driving one motor 22, the reduction gear 2
The two output shafts that are driven and output from the output shaft 25a are connected to the respective pulleys 26 and belts 26 provided on the two shafts.
a, 26a ', the respective ball screw nuts 29 of the two press machines 30, 30A are rotationally driven to rotate the ball screw 29.
a rotates and drives each press machine 30 and 30A.

When the two clutches 27 provided on the output two shafts 25a are both turned ON or OFF during this driving,
Both press machines move or stop. When any one of the clutches is turned on or off, one of the presses 30, 30A is moved, and only one press is moved.

[0031]

Second Embodiment A second embodiment of the present invention will be described with reference to FIGS. 2 and 3 to explain differences from the first embodiment. The same or equivalent parts as those of the first embodiment are denoted by the same reference numerals.

In FIG. 2, a reduction gear 25 is connected to the main shaft 24 of the motor 22 via a coupling 24a.
The main shaft pulley 24b is fitted and inserted in two stages without providing a ball screw driving pulley 28A below the ball screw nut 29 of each of the presses 30 and 30A from the pulley 24b, and these pulleys 24b and 28A are provided. The spaces are connected via belts 28a and 28a '.

The ball screw driving pulley 28
A is provided with a clutch 27A.

With the above-described structure, the driving force of the motor 22 is directly transmitted to the ball screw driving pulley 28A via the belts 28a and 28a ', and the lower part of the ball screw nut 29 of the plurality of presses 30 and 30A. The drive transmission can be separated for each of the press machines 30 and 30A so that the start and stop can be performed by the clutch 27A.

The other constructions and operations are the same as those of the first embodiment, and the description is omitted.

[0036]

As described above, according to the first aspect of the present invention, the motor and the speed reducer are provided in an assembled manner, and the speed reducer is provided with a plurality of output shafts. An output pulley is provided on the output shaft, and a ball screw driving pulley is provided on the ball screw nut portion having a braking device.The pulleys are connected via the belt, and the clutch is attached to each of the output pulleys. Provided.

Therefore, a plurality of presses can be driven by one motor. In addition, the system configuration can be consolidated and simplified, and at the same time, the number of parts can be reduced and the structure can be reduced. In addition, the size can be reduced as a whole, and the installation area can be reduced.

According to the second aspect of the present invention, a main shaft pulley is inserted and provided in the main shaft of the motor, and a ball screw driving pulley is provided in the ball screw nut portion having a braking device. Are connected via the belt, and a clutch is provided by assembling the ball screw driving pulley.

Therefore, a plurality of presses can be driven by one motor. Further, the system between the press machines can be integrated, the number of parts can be reduced, and an inexpensive configuration can be achieved. Also, the size can be reduced and the installation area can be reduced.

According to the invention described in claim 3, the braking device is provided for each of the presses.

Therefore, since the braking device is provided directly below the ball screw nut of each press machine, the braking can be effectively performed, and the starting and stopping can be performed with high accuracy.

According to the invention described in claim 4, the braking device is a disk brake. Therefore, the structure can be made simple and robust, so that the braking force is large and accurate braking can be performed.

[Brief description of the drawings]

FIG. 1A is a front view showing a first embodiment of the present invention. FIG. 2B is a view taken in the direction of arrows AA in FIG.

FIG. 2 is a front view showing the second embodiment.

FIG. 3 is a partial cross-sectional view of the clutch according to the first and second embodiments.

FIG. 4 is a comparison diagram of a system configuration between the first and second embodiments and a conventional example.

FIG. 5A is a front view of a press according to a conventional example. FIG. 5B is a cross-sectional view of the electromagnetic brake in the B section of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 ... Interlock mechanism for press machines 22 ... Motor 23 ... Braking device 25 ... Reduction gear 25a ... Output shaft 26 ... Output pulley 26a, 26a '... Belt 27 ... Clutch 28 ... Ball screw drive pulley 28a ... Belt 29 ... Ball screw nut 29a Ball screw 30, 30A Press machine 31 Mold clamping mechanism 32 Platen 33 Table

Claims (4)

[Claims] 1. A ball-clamping mechanism is provided between a platen and a table, a ball screw nut is provided through the center of the table, and a ball screw is provided by screwing the ball screw nut to the ball screw nut. The tip is connected to the mold clamping mechanism,
The ball screw nut is connected to a motor via a pulley and a belt, and the driving of the motor causes the mold clamping mechanism to operate to move the platen up and down. A plurality of output shafts provided on the speed reducer, an output pulley provided on each of the output shafts, and a ball screw driving pulley provided on the ball screw nut portion having a braking device. An interlocking mechanism for a press machine, wherein a clutch is provided by being connected via a belt and being assembled to each of the output pulleys. 2. A mold clamping mechanism is provided between the platen and the table, the ball screw nut is provided through a center of the table, and the ball screw is provided by being screwed to the ball screw nut. The ball screw tip is connected to the mold clamping mechanism, the ball screw nut is connected to the motor via the pulley and the belt, and the motor drives the mold clamping mechanism to operate the platen. In the press machine for vertically moving the main shaft, a main shaft pulley is inserted and provided on the main shaft of the motor, a ball screw driving pulley is provided on the ball screw nut portion having a braking device, and the belt is provided between the pulleys. An interlocking mechanism for a press machine, wherein the interlocking mechanism is connected to the ball screw driving pulleys and provided with a clutch. 3. The interlocking mechanism for a press machine according to claim 1, wherein the braking device is provided for each of the press machines. 4. The interlocking mechanism according to claim 3, wherein the braking device is a disc brake.