JP2000351138A - Automatic removing machine having plural stages of upper and lower arms - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accelerate a driving speed and to reduce a restriction in a height dimension by constituting upper and lower arms having handling portions at lower ends by dividing at least to specific stages. SOLUTION: The automatic removing machine comprises front and rear portions, upper and lower portions and a lateral portion. The upper and lower portions are portions for removing a molded molding from a mold out of the machine and associated with an upper and lower arm mechanism. The arm mechanism is constituted by dividing into three stages of a first stage arm 14, a second stage arm 18 supported by a guide bearing fixed to the arm 14, and a third stage arm 22 similarly supported to the arm 18. The arm mechanism is driven by using an AC servo motor 1. When the motor 1 is rotated, the arm 14 is operated, and then the arm 18 is also vertically moved at the same moving amount as that of the arm 14. The arm 22 is vertically moved in cooperation with the movement of the arm 18 to relatively move at the same moving amount as that of the arm 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic take-out machine for taking out a molded product from, for example, a resin molding machine, and more particularly to an automatic take-out machine having a plurality of upper and lower arms.

[0002]

2. Description of the Related Art The driving of an upper and lower arm mechanism in a conventionally known automatic take-out machine utilizes a special double speed mechanism using a high tension belt on a vertical axis, and a highly accurate operation is performed by a servo motor and a ball screw. Control has been made.

In actual operation, FIG.
When the AC servo motor 1 rotates, the timing pulley 2 directly connected to the motor shaft rotates, and the timing belt 3
, The other timing pulley 4 is rotated, and the ball screw 5 directly connected to the other timing pulley 4 is rotated. The rotation of the fixed ball screw 5 causes the upper ball screw nut 6 to move up and down, and accordingly, the main arm 7 connected to the upper ball screw nut 6 also moves up and down. The timing belt 8 stretched in the main arm 7 has one end fixed to the main cylinder bracket 9 and the other end connected to the sub arm 10, so that the sub arm 1 is moved by the same amount as the main arm 7 is moved.
0 moves at the same time, and as a result, the sub arm 10 moves up and down twice as much as the main arm 7.

A chuck attached to the lower end of the sub-arm 10 grips a molded product in a molding machine by lowering the sub-arm 10, and removes the molded product by ascending. In addition, in order to support the total weight of the upper and lower bodies and the chuck composed of the main arm and the sub arm, an air cylinder 11 is arranged to balance the weight, reduce the load weight on the motor 1, and enable high-speed operation, Care has been taken to ensure good responsiveness.

[0005]

However, as described above, the vertical arm mechanism of the conventional automatic take-out machine moves up and down at double speed, and the maximum driving speed is about 2000 mm / sec at most in the actual case. Further, with the above structure, when the crane in the factory is low, it is often very difficult to attach the crane to a molding machine, and a special design is required.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an automatic take-out machine which can increase the driving speed as compared with the conventional one and has less restrictions on the height.

[0007]

The above-mentioned object is achieved by an automatic take-out machine for a molding machine having an upper and lower arm having a handling portion at a lower end thereof, wherein the upper and lower arms are divided into at least three stages. The upper and lower arms divided into three stages are a first stage arm which is directly moved up and down by a driving source, and a second stage arm which is attached to the first stage arm and connected to an endless belt which is fixed at one position. Arm and
It is preferable to include a third-stage arm attached to the second-stage arm and connected to an endless belt whose one position is fixed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1 which shows the characteristic portions of the present invention in a simplified manner, the driving of the upper and lower arms is performed by the same method as in the prior art.
This is performed using the servo motor 1. The weight of the entire arm body is supported by the balance cylinder 12, and the drive by the servomotor 1 is designed to be operated without difficulty.

When the servomotor 1 rotates, the timing pulley 2 directly connected to the motor shaft rotates to rotate the driven timing pulley 4 via the timing belt 3, and the ball screw nut 13 directly connected to the driven timing pulley 4 is rotated. Rotate. Since the position of the ball screw nut 13 is fixed, the rotation of the ball screw nut 13 causes the ball screw 5 to move up and down, and accordingly, the first arm 14 operates. The timing belt 17 stretched between the upper and lower timing pulleys 15 and 16 in the first-stage arm 14 has one end fixed and the other end connected to the second-stage arm 18. In conjunction with the vertical movement, the second-stage arm 18 also moves up and down by the same amount as the movement amount of the first-stage arm 14. Further, the timing belt 21 stretched between the upper and lower timing pulleys 19 and 20 in the second-stage arm 18 has one end fixed similarly to the timing belt of the first-stage arm.
Since the other end is connected to the third-stage arm 22, the third-stage arm also moves up and down in conjunction with the vertical movement of the second-stage arm 18. This also causes the relative movement by the same amount as the movement amount of the second-stage arm 18, and as a result, the third-stage arm 22
Therefore, the chuck serving as a handling unit attached to the lower end of the arm moves up and down by three times the ball screw 5 of the first-stage arm 14 and therefore the servomotor. In this embodiment, the upper and lower arms are shown as being divided into three stages. However, it is of course possible to constitute them as being divided into four or more stages.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described based on an example shown in the drawings. FIG. 2 shows an automatic take-out machine according to the present invention. The automatic take-out machine basically includes a front and rear body part 25, an upper and lower body part 26, and a horizontal body part 27. The front and rear body part 25 and the upper and lower body part 26 forming the front and rear arms are shown in plan view in FIG. 3, and FIG. 4 shows a side view from the direction D in FIG. The front and rear body part 25 is used for approaching the mold attached to the molding machine.
This is a part that separates and is moved along the guide rail 29 by the front and rear body motor 28 shown in FIG. The upper and lower body portion 26 is a portion for taking out a molded product molded from the above-mentioned mold outside the machine, and has an upper and lower arm mechanism incorporated therein. The upper and lower arm mechanisms are as shown in FIG.
The first-stage arm 14 and the four fixed to the first-stage arm
Arm 1 supported by two guide bearings 29
8 and a third stage arm 22 supported by the same four guide bearings 30 fixed to the second stage arm 18.

FIG. 6 is an enlarged view of the upper and lower parts constituting the characteristic part of the present invention. A front-rear body motor 31 for driving the front-rear body part 25 is shown in the left corner of the figure. 7 shows the front of the upper and lower bodies from the direction B in FIG. 6, and FIG.
FIG. 9 shows a side view from the direction C in FIG. In this example, a third-stage arm 22 is provided on each side of the second-stage arm 18 sliding along the first-stage arm 14 incorporating the timing pulley 15 for stretching the timing belt as seen in FIG. ing. The driving of the arms of each stage is performed by the driving motor 32 shown in FIGS.

[0012]

According to the present invention, by arranging the upper and lower arms in at least three stages, a special double-speed mechanism applying the principle of a moving pulley can be superimposed. Can increase the maximum displacement speed in the handling section by 30% or more as compared with the conventional two-stage structure. In addition, since the telescopic structure has an overlapping telescopic structure, the dimension in the height direction of the upper and lower arms can be reduced by up to 40% in the three-stage structure as compared with the two-stage structure, and the height direction is greatly restricted. The merit is great when installing an automatic take-out machine at the place.

[Brief description of the drawings]

FIG. 1 is a schematic view showing the structural principle of a three-stage upper and lower arm of an automatic unloader according to the present invention.

FIG. 2 is a schematic perspective view of the automatic take-out machine.

FIG. 3 is an enlarged plan view of a front and rear body portion of the automatic unloading machine.

FIG. 4 is a side view of the front and rear body in the direction of arrow D in FIG. 3;

FIG. 5 is a schematic front view showing a state in which a three-stage arm of an upper and lower body portion of the automatic unloader has been operated.

FIG. 6 is an enlarged plan view of the upper and lower body portions of the automatic unloader.

FIG. 7 is a front view of the upper and lower body in the direction of arrow B in FIG. 6;

8 is a side view of the upper and lower body in the direction of arrow A in FIG. 6;

FIG. 9 is a plan view of the upper and lower body in the direction of arrow C in FIG. 7;

FIG. 10 is a schematic view showing the structural principle of a two-stage upper and lower arm of a conventionally known automatic take-out machine.

[Explanation of symbols]

 2, 4, 15, 16, 19, 20 Timing pulley 3, 17, 21 Timing belt 5 Ball screw 13 Ball screw nut 14 First vertical arm 18 Upper second vertical arm 22 Upper third vertical arm

Claims (2)

[Claims] 1. An automatic unloader for a molding machine having an upper and lower arm having a handling part at a lower end, wherein the upper and lower arms are divided into at least three stages. 2. The upper and lower arms divided into three stages include a first stage arm directly moved up and down by a driving source, and an endless belt attached to the first stage arm and fixed at one position. 2. The vehicle according to claim 1, further comprising: a second-stage arm connected to the second-stage arm; and a third-stage arm connected to an endless belt attached to the second-stage arm and fixed at one position. 3. Automatic removal machine as described.