JPH09314260A - Work reversing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To balance the weight (moment) without increasing the installing space. SOLUTION: A work reversing arm 11 having a vacuum suction pad 19 to adsorb and hold a work W is installed on a frame 1, a weight balancing device 23 providing a balance weight 35 being balanced to the total weight of the work reversing arm 11 and the work W is installed with hanging on an upper beam 3 of the frame 1. In order to drive with reversing the weight balancing device 23 and the work reversing arm 11, follower side chain wheels 21, 29 are installed onto respective rotary shafts 13, 27, and an endless chain 53 is hung over them together with a chain wheel 47 of the driving side installed on a driving motor 45. So, the weight (moment) can be balanced with the balance weight 35 and the installing space is also made without increasing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work reversing device.

[0002]

2. Description of the Related Art Conventionally, for example, a work unloading means has been widely used for transferring a work placed on a work table to a work unloading table provided adjacently by a work inverting device.

That is, a work reversing device having a structure shown in FIGS. 10 and 11 is generally used. The work reversing device 101 is provided on a pedestal 103, and a reversing arm shaft 107 is rotatably provided on a bearing 105 provided on the pedestal 103. A plurality of reversing arms 109 are extended on the reversing arm shaft 107. This reversing arm 109 is provided.
A plurality of vacuum suction pads 111 are provided upright. It should be noted that the vacuum suction pad 111 is positioned at a position which is always recessed from the upper surface of the roller 115 which is the carry-in table 113 provided on the frame 103.

Further, a balance weight 117 is provided on the opposite side of the reversing arm shaft 107 from the reversing arm 109 so as to balance the total weight of the reversing dome 109 and the work W. If the balance weight 111 is not provided, a large amount of power is required to drive the reversing arm 109 to reverse.

The work W placed on the carry-in table 113 is a vacuum suction pad 1 provided on the reversing arm 109.
It is sucked and held at 11, the reversing arm 109 is reversed, and it is transferred to the receiving-side carry-out conveyor 119 provided adjacent thereto. (Indicated by a chain double-dashed line in FIG. 10) A plurality of rollers 121 are provided on the carry-out conveyor 119, and the work W transferred by the rotation of the rollers 121.
Is transported to the next step.

[0006]

In the conventional work reversing device 101 described above, in order to cancel the total weight (moment) of the reversing arm 109 and the work W,
Since the balance weight 117 is provided, FIG.
As shown in FIG. 5, the carry-in table 113 and the carry-out conveyor 119 are provided apart from each other by L dimension so as not to come into contact with the movement of the balance weight 117.

Therefore, there is a problem that the installation space is increased, and the balance weight 1 is disliked by the increase in space.
If 17 is not attached, a large moment is generated and a large amount of power is required for driving.

An object of the present invention is to provide a work reversing device for balancing the weight (moment) without increasing the installation space.

[0009]

In order to achieve the above object, the work reversing device of the present invention according to claim 1 is provided with a plurality of work table conveyors at appropriate intervals in the front-rear direction on a gantry. A work reversing arm having a plurality of suction holding means for sucking and holding a work placed on a work conveyor is provided between the work table conveyors and provided on the gantry, and the work reversing arm is driven to reverse. A drive member is provided, and a weight balance device is provided so as to hang down from the gantry. A second drive member for reversing the weight balance device is connected to and interlocked with the first drive member.

The work reversing device of the present invention according to claim 2 is characterized in that the suction holding means comprises a vacuum suction pad.

Further, in the work reversing device of the present invention according to claim 3, the first driving member and the second driving member are connected to each other,
The interlocking is characterized in that the third drive member, the first drive member, and the second drive member, which are mounted on the output shaft of the drive motor, are wound around in an endless band.

By the work reversing device according to the above-mentioned claims 1, 2 and 3, the weight balance device is provided below the reversing arm with the balance weight which balances the total weight of the work reversing arm and the work. Was set up. Therefore, the weight balance device can be installed close to the work table so that an adjacent work unloading device for inverting and transferring the work by the work reversing device can be provided close to the work table without protruding from the work reversing arm, thus reducing the installation space. The torque is always balanced by the balance weight.

Further, in the work reversing device of the present invention according to claim 4, the balance weight provided in the weight balance device is provided so as to be movable and positioned by an actuator by engaging with a groove formed in the longitudinal direction of the balancer arm. It is characterized by

Therefore, even if the weight of the work to be reversed changes, the distance can be balanced by changing the distance from the center of rotation of the balance weight by the actuator, and the work can be easily set by remote control.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1, FIG. 2, FIG. 3 and FIG. 4, the gantry 1 is made of steel in the shape of a box frame, and a chain conveyor 7 constituting a work table 5 is provided on the upper surface of the upper beam 3. A plurality of them are provided in parallel at appropriate intervals. (Fig. 3
A plurality of work reversing arms 11 which are members constituting the work reversing device 9 are provided between the plurality of chain conveyors 7 arranged in parallel, and the base of the work reversing arms 11 has a square shape. It is integrally fixed to the rotating shaft 13. A shaft 15 is provided so as to extend at both ends of the rotary shaft 13, and the shaft 15 is provided with a bearing 1 provided on the upper beam 3.
It is rotatably supported on 7.

As shown in FIG. 1, the work reversing arm 11 is provided with a plurality of suction holding means, for example, vacuum suction pads 19. The upper surface of the vacuum suction pad 19 is always positioned at a position lower than the upper surface of the chain conveyor 7. Further, one end of the shaft 15 (on the front side orthogonal to the drawing in FIG. 1,
The chain wheel 21 on the driven side, which is the first driving member, is fixed to the right side in FIG. 2 and the lower side in FIG.

A weight balance device 23 that balances the total weight of the work reversing arm 11 and the work W is shown in FIGS.
Referring also to FIG. 7 and FIG. 7, a plurality of bearings 25 are provided at the lower part of the upper beam 3 constituting the gantry 1 as shown in FIG. A rotary shaft 27 is rotatably supported by the bearing 25, and a shaft end of the rotary shaft 27 (front side orthogonal to the drawing in FIG. 1, right side in FIGS. 2 and 5, lower side in FIG. 3). A chain wheel 29 on the driven side, which is a second drive member, is fixed to the rotary shaft 27.
A balancer arm 31 is integrally provided on the side opposite to the sprocket.

A balance weight 35 integrally fixed by a fastening member 33 is provided at the tip of the balancer arm 31, and the balance weight 35 is provided on the balance weight 35 as shown in detail in FIG. An auxiliary balance weight 35A is attached to the stud bolt 37 and is integrally tightened with a nut 39. Therefore, by changing the weight of the auxiliary balance weight 35A, it is possible to cope with the weight of various works.

As a drive system 41 for rotating the work reversing arm 11 and the balance weight 35, as shown in FIG. 1, a drive motor 45 is provided on the lower beam 43 of the gantry 1, and the drive motor 45 is provided. A drive-side chain wheel 47, which is a third drive member, is integrally mounted on the output shaft of the. In addition, a bearing 49 is provided on the lower surface of the upper beam 3.
There is provided a tension wheel 51 rotatably supported on the. Then, the drive side chain wheel 4
An endless chain 53 as an endless belt is wound around the 7, the driven side chain wheels 21 and 29, and the tension wheel 51.

Further, reference numeral 55 shown in the drawing of FIG. 1 is a work carrying-out device for the next process, which is provided adjacently, and is constituted by a roller conveyor 57.

With the above construction, the operation is as shown in FIG.
Referring also to, the work W conveyed by the chain conveyor 7 is positioned at a predetermined position, the drive motor 45 is driven to rotate the work reversing arm 11 in the counterclockwise direction in FIG. Suction pad 19
Holds the back surface of the work W by suction. Then, the work reversing arm 11 is rotated by 180 degrees and positioned on the roller conveyor 57 which is the adjacent work unloading device 55,
The suction of the vacuum suction pad 19 is released, and the work W is transferred onto the roller conveyor 57 and carried out to the next step.

The balance weight 35 provided on the weight balance device 23 by the drive of the drive motor 45 also rotates 180 degrees in the counterclockwise direction in FIG. Move to the position indicated by the chain double-dashed line. At this time, as shown in FIG. 8, the rotation shaft 13 provided on the work reversing arm 11 and the weight balance device 2
The moments M ₁ and M ₂ applied to the driven chain wheels 21 and 29 mounted on the rotary shaft 27 provided on
The rotation force K ₁ of the work reversing arm 11 and the rotational force K ₂ by the balance weight 35 are applied to the endless chain 53 and are applied to the drive-side chain wheel 47 provided in the drive motor 45.

Therefore, by attaching the balance weight 35 so as to balance the weights of the work reversing arm 11 and the work W, the torque is always balanced while the work reversing arm 11 rotates 180 degrees. Further, the balance weight 35 provided in the weight balance device 23 does not protrude from the work reversing arm 11 and the reversing arm 1
When 1 is reversed and the work is transferred to the adjacent work unloading device 55, the roller conveyor 57 can be provided close to the work table 5, and the installation space can be shortened.

FIG. 9 shows an example of another embodiment of the weight balance device 23. The other example of the embodiment is different from the above-described example of the embodiment in that the balance weight is movable by an actuator, the other constituent members are the same, and the same members are denoted by the same reference numerals. Is attached and the description is omitted.

That is, the driven chain wheel 29
A balancer arm 59 is fixed to the rotating shaft 27 on which is mounted, and a groove 61 is provided extending in the longitudinal direction on the inner surface side of the balancer arm 59. Both ends of the balance weight 63 in the groove 61 are engaged with each other to be movable.
For example, an air cylinder 65 is provided as an actuator that is a driving source for movement.

With the above structure, the position of the balance weight 63, that is, the distance from the center of rotation, is changed by the operation of the air cylinder 65, thereby responding to the presence or absence of the work W and the change in the size and weight of the work W. And balance. Moreover, the position of the balance weight 63 can be easily set by remote control.

The present invention is not limited to the above-described embodiments of the present invention, but can be embodied in other forms by making appropriate changes. For example, although the balance weight 63 is moved by the air cylinder 65 which is an actuator, the balance weight 63 can be moved via a power transmission member (a rack, a pinion, etc.) instead of the drive motor.

[0029]

As can be understood from the above description of the embodiments, the present invention according to claims 1, 2 and 3 provides a weight balance device having a balance weight below the work reversing arm. The balance weight is balanced with the total weight of the work reversing arm and the work.

Thus, the torque is always balanced while the work reversing arm rotates 180 degrees. Also,
The balance weight provided in the weight balance device does not protrude from the work reversing arm.When reversing the work reversing arm and transferring a work, the work unloading device can be installed close to the work table, which reduces the installation space. It can be shortened.

According to the invention of claim 4,
By moving the balance weight by operating the actuator and changing the distance from the center of rotation, it is possible to achieve a balance in accordance with the presence or absence of the work and the change in the size and weight of the work. Moreover, the position of the balance weight can be easily set by remote control.

[Brief description of drawings]

FIG. 1 is a side view of a work reversing device, showing a main part of the present invention.

FIG. 2 is a front view as viewed from the left side in FIG.

FIG. 3 is a plan view of FIG.

FIG. 4 is a perspective explanatory view showing a configuration of a work reversing device.

5 is an enlarged cross-sectional view taken along the line VV in FIG.

FIG. 6 is an enlarged side view of a VI arrow portion in FIG.

7 is an enlarged sectional view taken along line VII-VII in FIG.

FIG. 8 is an operation explanatory view.

FIG. 9 is a perspective explanatory view of a weight balance device showing another embodiment of the present invention.

FIG. 10 is a side view of a work reversing device showing a conventional example.

FIG. 11 is an explanatory plan view of FIG. 10;

[Explanation of symbols]

 1 cradle 3 upper beam 5 work table 9 work reversing device 11 work reversing arm 13 turning shaft 19 vacuum suction pad (suction holding member) 21 driven chain wheel (first drive member) 23 weight balance device 27 turning shaft 29 Driven chain wheel (second drive member) 31,59 Balancer arm 35,63 Balance weight 41 Drive system 45 Drive motor 47 Drive side chain wheel (third drive member) 53 Endless chain (endless belt) 61 Groove 65 Air Cylinder (Actuator) W Work

Claims (4)

[Claims] 1. A work reversing arm provided with a plurality of work table conveyors on a gantry at appropriate intervals in the front-rear direction, and a plurality of suction holding means for sucking and holding a work placed on the work table conveyor. Provided between the respective work table conveyors and provided on the gantry, a first drive member for inverting and driving the work inverting arm is provided, and a weight balance device provided with a balance weight is hung on the gantry. A second drive member for reversing the weight balance device is connected to the first drive member,
Work reversing device characterized by being interlocked. 2. The work reversing device according to claim 1, wherein the suction holding means is composed of a vacuum suction pad. 3. The connection and interlocking between the first drive member and the second drive member are endless when the third drive member, the first drive member and the second drive member mounted on the output shaft of the drive motor are connected. The work reversing device according to claim 1, wherein the work reversing device is wound around in a band. 4. The work piece according to claim 1, wherein the balance weight provided in the weight balance device engages with a groove formed in a longitudinal direction of the balancer arm and is movable and positioned by an actuator. Inversion device.