JPH0321869Y2 - - Google Patents

Description

[Detailed description of the invention] (1) Industrial application field This invention uses a plurality of suction cups on an elevating body that can be raised and lowered on a support in order to attract and hold a workpiece placed on the support. The present invention relates to a work handling device provided with the workpiece handling device.

(2) Conventional technology Conventionally, such work handling devices press a plurality of cup-shaped suction cups made of an elastic material such as rubber against a workpiece to reduce the pressure inside the suction cups.
It is designed to hold the workpiece by suction.

(3) Problems that the invention aims to solve By the way, the suction cup has relatively good stability against the vertical movement of the workpiece, but it is unstable against the horizontal movement of the workpiece, and the gap between the suction cup and the workpiece is There is a risk that a gap may occur and the workpiece may fall. Furthermore, if lubricating oil or the like adheres to the workpiece, when the suction cup is pressed, it may slide sideways, causing the suction cup to shift in position, or create a gap, which may cause the workpiece to fall.

Therefore, some proposals have already been made in which the elevating body is provided with a positioning member that comes into contact with the outer edge of the workpiece in order to prevent the workpiece from moving horizontally relative to the suction cup during suction. When the positioning member is fixed to the elevating body as disclosed in Japanese Patent No. 41230, the positioning member simply moves up and down as the elevating body moves up and down, so it is necessary to bring it into precise contact with the outer edge of the workpiece. In particular, when the positioning member is pivoted to the elevating body so that it can be opened and closed via an opening/closing drive mechanism as disclosed in Japanese Utility Model Publication No. 11081/1981, a dedicated drive for the positioning member is required. It is necessary to provide a special mechanism, and there are problems such as its control is troublesome, the structure becomes complicated, and the cost increases.

The present invention has been proposed in view of the above, and an object of the present invention is to provide a work handling device that can solve all of the above-mentioned problems of conventional devices.

B. Structure of the invention (1) Means for solving the problem In order to achieve the above object, according to the invention, in order to attract and hold a workpiece placed on a support,
A work handling device comprising a plurality of suction cups provided on an elevating body that can be raised and lowered on the support,
A plurality of swinging supports are supported on the elevating body so as to be swingable around a horizontal axis at portions corresponding to the outwardly downwardly inclined inclined portions of the workpiece, and each of the swinging supports includes the above-mentioned swinging supports. A positioning member that can come into contact with the outer edge of the workpiece and a suction cup that can come into pressure contact with the upper surface of the inclined part of the workpiece, the swinging support body swings around the horizontal axis due to the pressure contact of the sucker with the inclined part. The positioning member is provided so as to be brought into contact with the outer edge of the workpiece.

(2) Function By simply lowering the elevating body and pressing the suction cup against the inclined part of the workpiece, the swinging support swings around the horizontal axis and automatically brings the positioning member into contact with the outer edge of the workpiece. Therefore, when the workpiece is suctioned and held by the suction cup, horizontal movement of the workpiece with respect to the suction cup is reliably prevented.

(3) Embodiment An embodiment of the present invention will be explained below with reference to the drawings. First, in FIG. A plate-like workpiece W is press-worked to form a plate-like workpiece W, and after the presswork, the workpiece W on the lower mold 1 is transported by a transporting device 2.

The conveying device 2 includes a pair of support arms 4, 4, which serve as elevating bodies, installed between a pair of transfer bars 3 that are arranged on both sides of the lower mold 1 and operate in the longitudinal direction and the vertical direction within a vertical plane. These support arms 4, 4 are equipped with the device of the present invention.

Referring also to FIG. 2, a swing shaft 5 having a horizontal axis is supported on each support arm 4 at a plurality of positions corresponding to the edge of the workpiece W so as to be swingable about the axis. Ru. That is, each support arm 4,
A hanging shaft 6 bent in an L-shape is fixed to each of the hanging shafts 4, and the swing shaft 5 is supported at the lower end of the hanging shaft 6.

These swing axes 5 are disposed corresponding to the edge of the workpiece W, which is an outwardly downwardly inclined inclined part, and are arranged so as to be perpendicular to a vertical plane perpendicular to the inclined surface. A swing shaft 5 is provided.

One or more suction cup support arms 7 are fixed at right angles to the swing shaft 5 at intervals in its longitudinal direction, and the bases 8a of cup-shaped suction cups 8 are attached to the tips of these support arms 7. will be placed. Further, the swing shaft 5 has one or more arms 9.
is fixed at a right angle, and a positioning member 1 that can come into contact with the outer edge of the workpiece W is attached to the tip of the arm 9.
0 is fixed. The swing shaft 5, the suction cup support arm 7, and the arm 9 cooperate with each other to rotate the swing shaft 5.
The swing support R of the present invention is configured to swing around a horizontal axis.

The position of each suction cup 8 and the positioning member 10 is determined by the pressure contact between each suction cup 8 and the upper surface of the inclined edge of the workpiece W, so that the swinging support R is oscillated and the positioning member 10 is moved to the outer edge of the workpiece W. It is designed to be in contact with each other.

Moreover, the transfer device 2 has a transfer bar 3.
The positioning member 10 is arranged so as to be able to come into contact with the outer edge of the work W at least at the front and back along the transport direction.

Each suction cup 8 has a plurality of, for example, two, for each swing shaft 5.
Divided into two systems, two reduced pressure sources 11a, 11
b For example, it is connected to a vacuum pump.

Next, to explain the operation of this embodiment, when the support arms 4, 4 descend when transporting the workpiece W on the lower die 1 after press working, each suction cup 8 is pressed onto the workpiece W. As a result, the positioning member 10 comes into contact with the outer edge of the work W as the swing shaft 5 swings. Therefore, work W
Even if lubricating oil is attached to the upper surface, each suction cup 8 is pressed against the upper surface of the workpiece W at a fixed position, and the suction cup 8 does not slip on the workpiece W. In this state, reduce pressure source 1
1a and 11b to reduce the pressure inside the suction cup 8, the workpiece W is attracted and held by the suction cup 8.

Therefore, the workpiece W is transported in accordance with the rise and horizontal movement of the transfer bar 3, that is, the support arms 4, 4. Even if an inertial force acts on the workpiece W during this transport, the positioning member 10 does not move the workpiece W.
Since the workpiece W is in contact with the outer edge of the suction cup 8, the workpiece W does not move horizontally with respect to the suction cup 8, and the workpiece W is transported while being reliably attracted and held by the suction cup 8.

By the way, it is assumed that during such transportation, one of the suction cups 8 is exposed to the atmosphere for some reason. If it is exposed to the atmosphere like this,
Although the suction force of each suction cup 8 connected to the same vacuum source 11a as that suction cup 8 decreases, the suction force of the suction cup 8 connected to the remaining vacuum source 11b is still maintained, and the workpiece W falls. You can avoid doing that.

In the above embodiment, the case where the present invention is applied to the conveying device 2 attached to a press machine has been described, but the present invention can be widely implemented as a work handling device for attracting and holding a work W. It is.

C. Effects of the invention As described above, according to the invention, a work piece is formed by providing a plurality of suction cups on an elevating body that can be raised and lowered on a support body in order to attract and hold the work piece placed on the support body. In the handling device, a plurality of swinging supports are supported on the lifting body so as to be swingable about a horizontal axis at a portion corresponding to an outwardly downwardly inclined inclined portion of the workpiece, and each of the swinging supports for,
a positioning member that can come into contact with the outer edge of the work;
A suction cup that can press against the upper surface of the inclined part of the workpiece causes the swinging support to swing around the horizontal axis due to the pressure contact of the suction cup against the inclined part, thereby bringing the positioning member into contact with the outer edge of the workpiece. Therefore, when the suction cup is pressed against the inclined part of the workpiece, the positioning member that contacts the outer edge of the workpiece can reliably prevent horizontal movement of the workpiece with respect to the suction cup, and the workpiece can be reliably held in a fixed position. It can be adsorbed and retained.

In particular, by simply lowering the elevating body and pressing the suction cup against the inclined part of the workpiece, the swinging support that responds to the pressure swings around the horizontal axis and automatically moves the positioning member to the outer edge of the workpiece. Since the positioning member can be brought into contact with the outer edge of the workpiece, the positioning member can always be easily and precisely brought into contact with the outer edge of the workpiece. Moreover, there is no need to provide a dedicated opening/closing drive mechanism for the positioning member, so the structure of the device can be modified accordingly. This simplification and easy control can greatly contribute to cost reduction.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which FIG. 1 is a vertical sectional side view, and FIG. 2 is a sectional view taken along the line -
FIG. 2 is a partially omitted plan view seen from the - line in FIG. 1. DESCRIPTION OF SYMBOLS 1... Lower die as a support body, 4... Support arm as an elevating body, 5... Swing shaft, 8... Suction cup, 1
0... Positioning member, R... Rocking support, W...
work.

Claims (1)

[Scope of utility model registration request] In a work handling device in which a plurality of suction cups 8 are provided on an elevating body 4 that can be raised and lowered on the support body 1 in order to attract and hold a workpiece W placed on the support body 1, the elevating body 4 is provided with a plurality of suction cups 8. is of work W,
A plurality of swinging supports R are supported so as to be swingable around a horizontal axis at portions corresponding to the inclined portions that are inclined outwardly and downwardly, and each swinging support R is provided with a support member R that is in contact with an outer edge of the workpiece W. A positioning member 10 to be obtained and a suction cup 8 that can be pressed against the upper surface of the sloped part of the workpiece W cause the swinging support R to swing around the horizontal axis due to the pressure contact of the suction cup 8 to the sloped part. A work handling device characterized in that the positioning member 10 is provided so as to come into contact with the outer edge of the workpiece W.