JPH0321870Y2 - - Google Patents

Description

[Detailed description of the invention] A. Purpose of the invention (1) Industrial application field The present invention is a work handling device, in particular, a workpiece placed on a support, which is capable of adsorbing and holding a workpiece in multiple areas of the workpiece. In order to achieve this, a plurality of suction units are provided at intervals from each other on an elevating body that can be raised and lowered on the support, and each of the suction units adsorbs the workpiece within the area corresponding to the unit. The invention relates to a device of the type comprising at least two suction cups.

(2) Prior Art Conventionally, in such work handling devices, all of the plurality of suction cups in each suction unit are commonly connected to a single depressurization source in consideration of the convenience of piping, etc.

(3) Problems to be solved by the invention If all the suction cups in each adsorption unit are connected to a single decompression source as in the past, if one of the suction cups were to be exposed to the atmosphere, , the suction force of all the remaining suction cups of the suction unit decreases, and the suction unit becomes substantially ineffective.

However, since the plurality of suction units cooperate with each other to suction and hold multiple areas of the workpiece so that the workpiece can be accurately supported in a well-balanced manner, one suction unit may be ineffective as described above. In this case, the workpiece cannot be supported in the corresponding area, and the support balance among the plurality of suction units may be lost, leading to unstable support of the workpiece.

In addition, such a problem can be seen in, for example, Utility Model Application Publication No. 57-59092.
As disclosed in the above publication, it is possible to solve the problem by specially installing control valves to suppress the amount of air leakage at the suction parts of all the suction cups, but in that case, it is necessary to install the same number of control valves as the number of suction cups. must be prepared,
This results in a significant increase in costs.

The present invention was developed in view of the above circumstances, and is designed to prevent the overall suction force of the suction unit from being extremely reduced even if one suction cup in the suction unit were to be exposed to the atmosphere. The purpose of this invention is to provide a work handling device with a simple structure.

B. Structure of the invention (1) Means for solving the problem In order to achieve the above object, the invention adsorbs and holds a workpiece placed on a support in multiple areas of the workpiece. In order to achieve this, a plurality of adsorption units are provided at intervals from each other on an elevating body that can be raised and lowered on the support, and each of the suction units is capable of adsorbing the workpiece within the area corresponding to the unit. In a work handling device comprising at least two suction cups, some of the suction cups of each suction unit are connected to a first vacuum source, and at least some of the remaining suction cups are connected to a first vacuum source, and at least some of the remaining suction cups are connected to a first vacuum source. It is characterized in that it is connected to a second reduced pressure source independent from the first reduced pressure source.

(2) Effect Even if some of the suction cups in one suction unit were to be exposed to the atmosphere, the suction force of some of the suction cups in other suction units that share the same vacuum source as that suction cup would simply decrease. Since the suction force of all the suction cups in each suction unit is not lost at the same time, the workpiece can be accurately supported in a well-balanced manner by all the suction units in the entire area corresponding to each suction unit. .

(3) Embodiment An embodiment of the present invention will be described below with reference to the drawings. First, in FIG. A plate-like workpiece W is pressed to be formed, and after the pressing, the workpiece W on the lower die 1 is carried out by the conveyance device 2.

The conveying device 2 has a conveying body T as an elevating body, and this conveying body T has a pair of transfer bodies disposed on both sides of the lower mold 1 and operating in the longitudinal direction and the vertical direction within the vertical plane. It is composed of an arbor 3 and a pair of support arms 4 integrally installed at a distance between the transfer arbor 3, and the device of the present invention is mounted on the support arms 4.

Referring also to FIG. 2, each support arm 4, 4
, a plurality of suction units U 1 , for sucking and holding a plurality of areas A ₁ , A ₂ of the workpiece W, respectively _.
U2 is provided corresponding to each of the plurality of areas _A1 and _A2 . Each suction unit U ₁ ; U ₂ has a horizontal swing shaft 5 1 which is bent into an L-shape and is rotatably supported at the lower end of a hanging shaft 6 ₁ ; 6 ₂ whose upper end is fixed to each support arm _4. ; 5 ₂ , and each of the swing axes 5 ₁ ; 5 ₂ corresponds to the inclined edge of the workpiece W in each area A ₁ ;A ₂ of the workpiece W, and moreover, It is arranged perpendicular to a vertical plane that is perpendicular to the inclined plane.

Each swing shaft 5 ₁ ; 5 ₂ has a plurality of suction cup support arms 7 ₁ , 7 ₁ , 7 arranged at intervals in the longitudinal direction thereof.
₁ ; 7 ₂ , 7 ₂ are fixed at right angles, and cup-shaped suction cups 8 ₁ , 8 ₁ , 8 ₁ ; _{8 2} are attached to the tips of these suction cup support arms 7 ₁ , 7 ₁ , _{7 1 ;} , 8 ₂ base 8a ₁ , 8
a ₁ , 8a ₁ ; 8a ₂ , 8a ₂ are attached. Further, each swing shaft 5 ₁ , 5 ₂ has one or more arms 9 .
₁ and 9 ₂ are fixed at right angles, and these arms 9 ₁ ,
Positioning members 10 1 , 1 that can come into contact with the outer edge of the workpiece W in the respective areas A ₁ , A ₂ are provided at the tips _of the parts 9 ₂ .
0 ₂ is fixed.

The mounting positions of the suction cups 8 ₁ , 8 ₁ , 8 ₁ ; 8 ₂ , 8 ₂ and the positioning members 10 ₁ , 10 ₂ are determined by the pressure contact between the suction cups and the inclined surface of the workpiece W on the swing shafts 5 ₁ ; ₂
are oscillated to bring the positioning members 10 ₁ and 10 ₂ into contact with the outer edge of the workpiece W.

Moreover, the transfer device 2 has a transfer bar 3.
The positioning member 1 of the suction units U ₁ and U ₂ is conveyed along the longitudinal direction of the workpiece W.
0 ₁ and 10 ₂ are arranged so as to be able to abut against the outer edge of the work W at least at the front and back along the conveyance direction.

Each suction unit U ₁ ; a plurality of suction cups 8 ₁ , 8 ₁ of U ₂ ;
Some of 8 ₁ ; 8 ₂ , 8 ₂ are connected to the first reduced pressure source 11b such as a vacuum pump, and the remaining ones are connected to the first reduced pressure source 11b such as a vacuum pump.
It is connected to a second reduced pressure source 11a independent from 1b.

Next, to explain the operation of this embodiment, when the support arms 4 _, 4 descend when transporting the workpiece W on the lower mold 1 after press working, a plurality of suction units _U1 ; Suction cup 8 ₁ , 8
₁ , 8 ₁ ; 8 ₂ , 8 ₂ are pressed against the areas A _{1 ; A 2 of} the workpiece W corresponding to the suction units U ₁ ; ₂ swings, the positioning members 10 ₁ , 10 ₂ of each suction unit U ₁ ; U ₂ move to each area of the workpiece W.
Abuts on the outer edges at A ₁ and A ₂ respectively. Therefore, even if lubricating oil is attached to _the upper surface of the workpiece W, the plurality of suction cups 8 ₁ , 8 ₁ , 8 ₁ ; 8 ₂ , 8 ₂ in each suction unit U ₁ ; The suction cups 8 ₁ and 8 ₂ are pressed against the upper surface of the workpiece W in the areas A ₁ and A ₂ and do not slip on the workpiece W. In this state, the pressure reduction sources 11a and 11b are operated to reduce the pressure inside each suction cup 8 ₁ and 8 ₂ , thereby reducing the pressure on the workpiece W.
are attracted and held by the suction cups 8 ₁ and 8 ₂ .

Therefore, the workpiece W is transported according to 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 members 10 ₁ and 10 ₂ Since it is in contact with the outer edge of the workpiece W, the workpiece W does not move horizontally with respect to the suction cups 8 ₁ and 8 ₂ .
The workpiece W is transported while being reliably attracted and held by the suction cups 8 ₁ and 8 ₂ .

By the way, during such transportation, the plurality of suction cups 8 ₁ , 8 ₁ , 8 ₁ , 8 ₂ , 8 of any of the suction units U ₁ and U ₂
Even if one of the parts ₂ is released to the atmosphere for some reason, the suction cups 8 ₁ , 8 ₂ and the depressurization source 1
Other adsorption units with the same 1b and 11a
The adsorption force of some of the suction cups 8 ₂ , 8 ₁ of U ₂ , U 1 is simply reduced, and each suction unit U ₁ ;U ₂ has a plurality _of suction cups 8 ₁ , 8 ₁ , 8 ₁ ;8 _{2 .} , 8 ₂ , there is no possibility that all the adsorption forces will be lost at the same time, and therefore all the adsorption units U ₁ and U ₂ can cover the entire area A ₁ , which corresponds to the units U ₁ and U ₂ respectively.
Since the work W can be accurately supported in a well-balanced manner at _A2 , the support of the work W is always stable and falling of the work W can be avoided.

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. Effect of the invention As described above, according to the invention, in order to adsorb and hold a workpiece placed on a support body in multiple areas of the workpiece, an elevating body that can be raised and lowered on the support body is used. A workpiece handling device, wherein a plurality of suction units are provided at intervals from each other, and each suction unit is provided with at least two suction cups that can respectively suction the workpiece within the area corresponding to the suction unit. , some of the plurality of suction cups of each adsorption unit are connected to a first vacuum source, and at least some of the remaining ones are connected to a second vacuum source independent of the first vacuum source. Therefore, even if some of the suction cups in one of the suction units are exposed to the atmosphere, the suction force of some of the suction cups in other suction units that share the same vacuum source as that suction cup will simply decrease. This eliminates the risk that the suction force of all the suction cups in each suction unit will be lost at the same time. Therefore, all the suction units can be operated effectively at all times, and the suction force corresponding to each suction cup can be Since the workpiece can be accurately supported in a well-balanced manner in all areas, the support of the workpiece is always stable and extremely effective in preventing the workpiece from falling. Moreover, such an effect can be achieved without the need to specially install a control valve for suppressing air leakage in each suction cup, and in addition, the first or second Since the reduced pressure source can be used in common, the overall structure of the device is simple and 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 support, ₈₁ , ₈₂ ...Sucker, 11a...First reduced pressure source, 11b...Second reduced pressure source, _A1 , _A2 ...Region, T...Elevation Transport body as a body, U ₁ , U ₂ ... adsorption unit, W ... workpiece.

Claims (1)

[Scope of utility model registration request] A work W placed on the support 1 is adsorbed at a plurality of areas A ₁ ; A ₂ of the work W, respectively.
An elevating body T that can be raised and lowered on the support 1 in order to hold the
A plurality of suction units U ₁ and U ₂ are provided at intervals from each other, and each of the suction units U ₁ ; U ₂ is
At least two units capable of adsorbing to the workpiece within the areas _A1 and _A2 corresponding to the units _U1 and _U2 , respectively.
comprising suction cups 8 ₁ , 8 ₁ , 8 ₁ ; 8 ₂ , 8 ₂ ,
In the work handling device, a plurality of suction cups 8 ₁ , _{8 1 ,} 8 ₁ ; _{8 2} ,
A part of 8 ₂ is connected to the first reduced pressure source 11b, and at least a part of the remaining part is connected to a second reduced pressure source 11a independent from the first reduced pressure source 11b. A work handling device characterized by: