DE1227216B - Device for holding objects by means of a holding disk that generates suction - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

B66c

German class: 35 b - 6/22

Number: 1227 216

File number: C29739XI / 35b

Filing date: April 24, 1963

Opened on: October 20, 1966

The invention relates to a device for holding objects through the reduction the static pressure in a liquid or gas flow constriction caused by an am Flange-like retaining disk arranged at the end of a line guide and the surface of the object itself is formed.

In known devices of this type, the line feed goes with an edge into the object facing surface of the retaining disk, so that vortex formation is not avoided can. However, vortex formations lead to a high energy consumption, which makes the generation of large Forces of attraction prevented.

In contrast, the invention is based on the object to create a device of the type mentioned above, by means of which an optimal holding force can be generated so that the device can also be used for lifting heavy objects, e.g. B. of plates or the like. Can be used.

This object is achieved according to the invention in that the inner wall of the line part, in which the flow is deflected into the surface of the retaining disc facing the object, with an edge-free curved surface merges into the surface facing the object. Through this vortex formation is practically avoided, so that optimum efficiency can be achieved and by means of the device designed according to the invention also heavy objects such. B. Plates, too can be held or lifted under water, in annealing furnaces or in a radioactive environment, where the use of suction air is practically out of the question.

There are also devices for holding objects by reducing the static Pressure by means of a liquid or gas flow in the space between one at the end of one Line routing arranged flange-like retaining washer and the surface of the object itself known, in which, however, the underlying idea is to generate this negative pressure in that the Air is driven radially outwards around a central space and thereby a suction effect in the central Space is created. In these known devices is for the correct functioning Formation of eddies is a prerequisite that is to be avoided in the subject matter of the invention.

In an advantageous embodiment of a device according to the invention, a second, flat device for holding objects is opposite the transition surface of the inner wall of the corresponding line part acting as a nozzle
by means of a retaining disk that generates suction

Applicant:

Karl M. Reich machine works,

Nürtingen (Bad.-Württ), Kißlingstr. 1

Named as inventor:

Dipl.-Ing. Adolf Cast, Oberlenningen

if an edge-free curved guide surface is provided, the one from the surface with the retaining disk connected deflector is formed. This ensures that the perpendicular to the surface of the body to be held arriving beam with as little resistance as possible in one direction parallel is deflected to the body surface. By this in the gap between the retaining plate and the surface of the object adjusting negative pressure is the body down to a minimum distance pressed against the retaining disc by the ambient pressure. This situation is stable as it approaches further the pressure in the gap rises above the ambient pressure, whereas an increase in the distance the increasing negative pressure counteracts this.

The deflecting body can be designed so that it has a contact surface for the object to be held has, so that it is also suitable to ensure the optimal gap width. Through this the body to be held is pressed against the deflection body with maximum holding force and is vibration-free recorded, which is particularly important in the case of plate-shaped bodies to be held. Here It is advantageous to provide the deflecting body axially adjustable relative to the retaining disk in order to achieve the Device to adapt to different conditions. Instead of or simultaneously with the Deflection bodies can support supports for supporting the holding disk on the object to be held be. These can also be designed so that the height of the support supports compared to the to be held object facing surface of the holding disc is adjustable.

In a further advantageous embodiment of the invention, the retaining disk can be wholly or partially

609 707/99

wise consist of an elastic material so that they adapt to bodies with a curved surface can.

The line can be routed with a compressed air source or with the suction side of a vacuum pump or a fan. There is then always a negative pressure in the narrowest cross-section a, so that the body to be held by the ambient pressure against the holding disk or possibly is pressed against the support supports or the deflection body.

This results in the advantageous application possibility that when several retaining washers are closed are composed of a larger holding surface, the nozzles of the holding discs partly with a compressed air source, can partly be connected to the suction side of a blower. This has the advantage that a Blower can be better used that at the same time its suction and its pressure side with one suction or blowing nozzle can be connected. Several retaining washers can also be used in a frame can be arranged in any direction, so that bodies of any shape are properly held will.

In the following, embodiments of devices according to the invention are with reference to the drawings described in more detail. The figures show in

Fig. 1 is a partial section through a with compressed air working retaining washer,

2 and 3 a view from below and the section of a retaining disk with support supports and Deflection element,

F i g. 4 and 5 section and plan view of a retaining disk with shut-off valve,

F i g. 6 and 7 application examples of the retaining washers.

An object 1 with a large surface 1 ', e.g. B. a plate, is held or held by negative pressure. be lifted. For this purpose, a circular retaining washer 2 is placed in the immediate vicinity of the surface Γ of the Object 1, whereby a gap 6 is created between the surface 1 'and the holding disk 2, brought (Fig.l).

The retaining disk 2 is provided with a nozzle 3, which via a flow line 4 with a not illustrated pressure generator is connected. If the nozzle 3 is a liquid or gas jet 5 with overpressure supplied, it is deflected in the nozzle 3 in the direction of the surface 1 'and flows in the Gap 6 between the retaining plate 2 and the object 1 to the outside. By arising in the gap 6 The object 1 is sucked against the holding disk 2 up to a certain minimum distance under negative pressure and held. To achieve the greatest possible jet speed in the gap 6, the must Beam 5 is deflected from flow line 4 into gap 6 with as little resistance as possible will.

This can e.g. B. with one arranged in the nozzle orifice and connected to the retaining plate 2 Deflection body 7 are effected (F i g. 2 and 3). The surface 2 'of the retaining plate 2 is in this Embodiment protruded by the deflection body 7 and 8 support supports. The item 1 is thus sucked against the surface 2 'projecting support surfaces 8' of the support supports 8 and held securely.

The deflecting body 7 and / or the support supports 8 can be used to set the most favorable gap height be axially displaceable.

The flow line 4 can also be connected to the suction side of a fan (not shown) be so that the jet 5 in the opposite direction from the environment through the gap 6 through 'the flow line 4 is sucked off.

In Fig. 4 and 5, a retaining disk 18 is additionally equipped with a shut-off valve 19. This shut-off valve initially prevents a liquid or gas jet 20 from escaping from the nozzle. It can e.g. B. consist of a valve plate 21 and an actuating pin 22, which has a surface 23 'of a Deflection body 23 protrudes. If the holding disk 18 is placed on an object 24 to be lifted, this opens the valve disk 21 via the actuating pin 22 and releases the jet 20.

Although FIGS. 1 to 3 are circular retaining disks 2 show, the retaining plate 18 can for reasons of space z. B. also executed with a rectangular plan be, as FIGS. 4 and 5 show. A change in the savings cross-section is achieved here, in that the gap height 25 increases steadily.

If objects with a curved surface are to be held or lifted, it is advisable to either adapt the retaining disk to the surface of the object or the retaining disk completely or partially made of an elastic material. The ambient pressure presses an elastic Holding disk 26 with its surface 26 'against an object 27 with a curved surface. Support supports 28 keep the necessary gap cross-section open, with the pressure medium of the holding disk 26 is supplied via a pressure line 29.

The device according to the invention also offers the possibility of holding plates without a fixed support is touched. This is particularly important in sizing saws where a plate 30 is attached Any places to be sawn, with a tool 31 to bring about a proper Cut must saw protruding without damaging a support. The plate 30 is here in any position by holding washers 32 arranged in a frame on a specific one Minimum distance sucked in and maintained. A lateral displacement of the plate 30 can be done by stops be prevented.

Claims (13)

Patent claims: 1. Device for holding objects by reducing the static pressure in a liquid or gas flow constriction through one at the end of a conduit arranged flange-like retaining disc and the surface of the object itself is formed is, characterized in that the inner wall of the line part (nozzle 3), in which the flow deflection into the surface (2 ', 26') facing the object (1) Retaining disk (2, 18, 26) takes place, with an edge-free curved surface in which the object (1) facing surface (2 ', 26') passes over. 2. Apparatus according to claim 1, characterized in that opposite the transition surface the inner wall of the corresponding pipe part acting as a nozzle (3) also has a second part Edge-free curved guide surface provided is that of the surface of a with the retaining plate (2, 18, 26) connected deflecting body (7, 23) is formed. 3. Apparatus according to claim 2, characterized in that the deflecting body (7, 23) so is designed that it has a contact surface for the object to be held (1). 4. Apparatus according to claim 3, characterized in that the deflecting body (7, 23) opposite the retaining disk (2, 18, 26) is axially adjustable. 5. Device according to one of claims 1 to 4, characterized in that on the holding disc (2, 18, 26) support supports (8, 28) are provided. 6. Apparatus according to claim 5, characterized in that the height of the support supports (8, 28) opposite the surface (2 ', 26') of the holding disk facing the object (1) to be held (2, 18, 26) is adjustable. ao 7. Device according to one of claims 1 to 6, characterized in that the holding disc (2, 18, 26) consists of an elastic material. 8. Device according to one of claims 1 to 7, characterized in that a by touch the holding device with the surface (Γ) of the object to be held (1) to be opened Shut-off valve (19) is arranged. 9. Apparatus according to claim 8, characterized in that the shut-off valve (19) has a Has valve plate (21) which by means of a protruding from the surface (23 ') of the deflection body (23) Actuating pin (22) is slidably mounted in the deflection body (23). I. Device according to one of claims 1 to 9, characterized in that the line guide is connected to a compressed air source. II. Device according to one of Claims 1 to 10, characterized in that the line routing with the suction side of a vacuum pump or a fan is connected. 12. Device according to one of claims 1 to 11, characterized in that several Retaining disks (2, 18, 26) are assembled to form a larger retaining surface (FIG. 7). 13. The apparatus according to claim 12, characterized in that the nozzles (3) of the holding disks (2, 18, 26) partly with a compressed air source and partly with the suction side of a fan are connected. Considered publications:
British Patent Nos. 748138, 862 973. 1 sheet of drawings 609 707/99 10.66 © Bundesdruckerei Berlin