JPH0221475Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is designed to suspend a plate-shaped body, especially a plate-shaped body whose surface is not allowed to have minute scratches or contamination, in a fluid, for example, in the air, in a non-contact state. The present invention relates to a device for floatingly transporting a plate-shaped body in a non-contact state using a fluid to transport the plate-shaped body in a floating state according to the requirements of the invention.

Prior Art The inventor of the present application filed Japanese Patent Application No. 41-38718.
40343), a suction pipe and a discharge pipe constricted just before the discharge are combined so that the openings of both pipes face the same direction, and fluid is sucked in from the suction pipe and fluid is discharged from the discharge pipe at the same time. We proposed a method of suspending and floating a plate near the opening of a pipe without contact. In this method, as shown in Figs. 8 and 9, a suction pipe 1 and a discharge pipe 3 provided with an orifice 2 at an appropriate distance from the opening are arranged so that the openings 4 and 5 of both pipes face the same direction. The suction pipe 1 is connected to the suction port of the blower or a vacuum tank (not shown) through a conduit 9, and the discharge pipe 3 is connected to a compressor or a pressure tank (not shown) through a conduit 10, respectively. A unit device constructed as shown above uses a large number of devices arranged in parallel according to the width of the plate-shaped body intended for the purpose.In use, fluid such as air 6 is sucked in through the suction pipe 1, and at the same time, the device is injected into the discharge pipe 3. Orifice chair 2
By discharging a fluid such as air 7 as a jet stream and adjusting the suction negative pressure of the suction pipe 1 and the discharge pressure of the discharge pipe 3 as appropriate depending on the weight of the plate-shaped body 8 which is about to suspend and float, for example, the opening 4 , 5 facing downward and placing the plate-like body 8 horizontally in the air below, the distance between the openings 4, 5 and the upper surface of the plate-like body 8 is
The plate-shaped body 8 can be suspended in the air without contacting anything while being kept stably at 0.5 mm to 1 mm, and furthermore, by applying an appropriate external force to the plate-shaped body in the horizontal direction, The plate-shaped body 8 can be transported horizontally while stably suspended in the air.

Problems to be solved by the invention In the above case, the fluid 7 discharged from the orifice 2
The sum of the force F _D acting on the plate-like body 8 and the gravity acting on the plate-like body 8 and the plate-like body 8 of the fluid 6 sucked into the suction pipe 1
The plate-shaped body 8 is stably suspended in a non-contact state by balancing the negative pressure applied to the plate-shaped body 8.
When the plate-shaped body 8 approaches the opening 5 of the discharge pipe 3 due to its inertia, the fluid in the space S in the discharge pipe 3 downstream of the orifice 2 flows from the opening 5. Since it flows out easily, the increase in static pressure within the space S is small, so that the plate-like body 8 momentarily contacts the openings 4 and 5, damaging the plate-like body 8.
There is a possibility that the intended purpose of the above patent cannot be achieved.

Means for Solving the Problems The present invention eliminates the above-mentioned drawbacks, and even when the plate-shaped body 8 suddenly approaches the opening 5 of the discharge pipe 3 due to the above-mentioned causes, the inside of the discharge pipe 3 downstream of the orifice 2 is This device instantly increases the static pressure in the space S and causes the plate-shaped body 8 to float and transport while maintaining a certain distance without contacting the opening 5 of the discharge pipe 3 or the opening 4 of the suction pipe 1. This purpose is to provide a labyrinth fin 5a on the end face of the opening 5 of the discharge pipe 3 in the above patent to increase the fluid resistance of the gap passage between the opening 5 and the plate-shaped body 8. This is achieved by instantly increasing the static pressure in the cavity S of the discharge pipe 3 and preventing the plate-shaped body from approaching. In this case, the pressing force against the plate-like body 8 can be increased by expanding the cross-sectional area of the portion S of the discharge pipe 3 downstream of the orifice 2, and the orifice 2 can be formed with a plurality of nozzle holes. It is effective if the dynamic pressure of the jet flow in the discharge pipe 3 is rapidly weakened and the discharge pressure is reduced by constructing a shield plate made of a closed-cell shield plate or a shield plate made of open-cell foam.

Embodiment 1 As shown in FIGS. 1 and 2, several discharge pipes 3 are installed around a suction pipe 1 having a circular cross section, and the openings 4 of both pipes are
5 faces downward and both openings 4 and 5 are placed in close combination so that they are located on the same horizontal plane,
The discharge pipe 3 expands its inner diameter only near the opening 5,
The orifice 2 is fitted into the stepped part, and the opening 5
A large number of unit devices each having a labyrinth fin 5a on the end face are arranged in parallel so that the openings 4 and 5 are on the same plane, and the suction pipe 1 is connected to the suction port of a blower or a decompression tank (not shown) through a conduit 9. , discharge pipe 3
The apparatus is connected to a compressor or a pressure tank (not shown) through a conduit 10, respectively, and allows a plate-shaped body to be floated and conveyed in a non-contact state by means of a fluid.

Example 2 Suction pipe 1 with a circular cross section as shown in Figs. 3 and 4
Several discharge pipes 3 are arranged in close combination around the discharge pipes 3 so that the openings 4 and 5 of both the pipes face downward and are located on the same horizontal plane. A unit device including a shielding plate 2a having a plurality of nozzle holes 2b formed at appropriate positions inward from the opening 5 and a labyrinth fin 5a provided on the end face of the opening 5 is attached to the openings 4 and 5. are arranged in parallel so that they are on the same plane, and the suction pipe 1 is connected to the suction port of a blower or a pressure reducing tank (not shown) through a conduit 9, and the discharge pipe 3 is connected to a compressor or a pressure tank (not shown) through a conduit 10. This is a device that floats and conveys a plate-shaped body in a non-contact state by means of a fluid, which is connected to each other.

Embodiment 3 As shown in FIG. 5, several discharge pipes 3 are arranged in close combination around a suction pipe 1 having a circular cross section so that the openings 4 and 5 of both pipes face downward. An orifice 2 is fitted at an appropriate position inward from the opening 5 of the discharge pipe 3, and a metal or plastic annular body 12 having a labyrinth fin 11 is fitted on the outer surface of the opening 5 of the discharge pipe 3. A large number of unit devices each having a lower end substantially flush with the lower end opening of the suction pipe 1 are arranged in parallel so that the lower end of the opening 4 and the annular labyrinth fin 11 are on the same plane. The outlet pipe 3 is connected to the suction port of the blower or a pressure reducing tank (not shown), and the discharge pipe 3 is connected to a compressor or a pressure tank (not shown) through a conduit 10, respectively, and the plate-shaped body is connected with the fluid in a non-contact state. This is a floating conveyance device.

Embodiment 4 As shown in FIGS. 6 and 7, two discharge pipes are arranged around a suction pipe 1 having a rectangular cross section so that the openings 4 and 5 of both pipes face downward and the openings 4 and 5 are on the same horizontal plane. A hard foamed plastic shielding plate 2a having continuous pores is fitted at an appropriate position inward from the opening 5 of the discharge pipe 3.
A large number of unit devices each having a labyrinth fin 5a provided on the end face of the opening 5 are arranged in parallel so that the openings 4 and 5 are on the same plane. without showing),
The discharge pipe 3 is connected to a compressor or a pressure tank (not shown) through a conduit 10, and is a device that floats and transports the plate-shaped body in a non-contact state using fluid.

Effect of the invention When the plate-shaped body 8 is brought close to the lower part of the openings 4 and 5 and the blower, compressor, etc. are operated to suck in the outside air 6 through the suction pipe 1 and cause the air 7 to flow out through the discharge pipe 3,
Suction pressure P _S , discharge pressure P _D , cross-sectional area of suction pipe opening 4 according to the weight per unit area of the plate body WKg/m ²
A _S , cross-sectional area A _D1 of discharge pipe 3, cross-sectional area A _D2 of discharge pipe opening 5, inner diameter d ₁ of orifice 2, number n of nozzle pores 2b per discharge pipe, diameter of nozzle pore 2b
d ₂ , the distance L between the lower surface of the nozzle 2 or the shielding plate 2a and the discharge pipe opening 5, and the number N of the above-mentioned unit devices per unit area. A certain distance h from the discharge pipe opening 5
can be stably floated at a distance of

In the apparatus _shown in Figs. 1 to 4, the ^plate - ^shaped body 8 is used _. ² A _S : Cross-sectional area of suction pipe opening 4 7.06cm ² A _D1 : Cross-sectional area inside discharge pipe 3 1.765cm ² A _D2 : Cross-sectional area of discharge pipe opening 5 in Fig. 1 7.06cm ² d ₁ : Orifice Inner diameter of 2 6mm n: Number of nozzle pores 2b per discharge pipe 10 pieces d ₂ : Diameter of nozzle pore 2b 1mm L: Distance between the bottom surface of orifice 2 or blocking material 2a and discharge pipe opening 5 10mm N: Number of unit devices per unit area 25 pieces/m ² When the plate-shaped body 8 is suspended horizontally in the air, the distance between its upper surface and the openings 4 and 5 is h = 0.8
It was suspended stably at a position of mm, and the distance h immediately became stable even at the start of the suspended suspension work. On the other hand, we conducted an experiment using the method of the patent, that is, FIG. 8, using the same conditions as above, and found that h = 0.5.
Although the plate-shaped body 8 was stably suspended and floated at a position of mm, some fluctuation was observed in the interval h at the start of the suspension floating operation.

Effects of the invention In the apparatus shown in FIGS. 8 and 9 disclosed in the above-mentioned Japanese Patent Publication No. 51-40343, when the plate-shaped body 8 is sucked up and the floating work is started as described above, the plate-shaped body 8 is caused by its inertia to close the discharge pipe. When approaching the opening 5 of 3, the orifice 2
The fluid in the space S in the discharge pipe 3 located further downstream easily flows out from the opening 5, and since the increase in static pressure in this space is small, the plate-shaped body 8 momentarily contacts the openings 4 and 5. Although there was a risk of damaging the plate-shaped body 8, in this case, the labyrinth fin 5 is attached to the end face of the opening 5 of the discharge pipe 3.
a is provided, the fluid 7 discharged from the discharge pipe 3 generates a large number of vortices in the labyrinth fin section, which prevents the fluid 7 from flowing out from the labyrinth fin section. In this case, the static pressure in the area increases instantaneously, and it is possible to reliably prevent the plate-shaped body 8 from coming into contact with the openings 4 and 5 and being damaged or contaminated.

Other embodiments In the above embodiment, several discharge pipes were arranged for one suction pipe, and the opening 4 of the suction pipe 1 and the opening 5 of the discharge pipe 3 were arranged on the same plane, but the discharge pipe 1
Several suction pipes may be arranged around the book, and the opening 4 of the suction pipe 1 may slightly protrude relative to the opening 5 of the discharge pipe 3. Further, in the above embodiment, the opening 4 of the suction pipe 1 and the opening 5 of the discharge pipe 3 are both directed downward, and air is used as the suction fluid 6 and the discharge fluid 7, and the rigid plate-like body is held horizontally in the air without contact. We have described an example of use in which the plate-like body 8 is suspended vertically or tilted in the air with the openings 4 and 5 oriented horizontally or diagonally downward. By supporting the weight W in an appropriate manner and determining the specifications in addition to taking into account changes in the influence of the weight W, it is possible to similarly carry out floating conveyance, and furthermore, the plate-like object can be transported with the openings 4 and 5 facing upward. 8
can also be carried floating in the air above the opening. Furthermore, the present device can be used in exactly the same way in gases other than air or in liquids such as water by using the same or similar properties to the surrounding fluids as the suction fluid 6 and discharge fluid 7. .

In addition, even if the plate-shaped body is made of a soft material, as long as it is not extremely soft, the discharge pipe 3 and The present device can be used by reducing the diameter of the suction pipes 1, arranging them closely and alternately, and reducing the difference in absolute values between the discharge pressure and the suction pressure.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of the main parts showing one embodiment of the present device, Fig. 2 is a bottom view of the same, Fig. 3 is a vertical cross-sectional view of the main parts showing another embodiment, and Fig. 4 is the bottom view of the same. 5 is a vertical sectional view of the main part showing the third embodiment, FIG. 6 is a vertical sectional view of the main part showing the fourth embodiment, FIG. 7 is a bottom view, and FIG. 8 is a vertical sectional view of the main part showing the fourth embodiment. FIG. 9 is a vertical cross-sectional view of the main parts of a conventional device, and FIG. 9 is a bottom view of the same. In the figure, 1 is the suction pipe, 2 is the orifice, 2a is the shielding plate, 2b is the nozzle pore, 3 is the discharge pipe, 4 is the opening of the suction pipe 1, 5 is the opening of the discharge pipe 3, 5a, 11
indicates a labyrinth fin, and 8 indicates a plate-like body.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A discharge pipe and a suction pipe are arranged in combination so that the openings of both pipes face the same direction, and an orifice is provided at an appropriate distance from the opening of the discharge pipe. A labyrinth fin is formed at the tip of the opening.
A device that floats and transports plate-shaped objects in a non-contact state using fluid. (2) Utility model registration claim No. 1 in which the inner diameter of the opening is larger than the inner diameter of the orifice of the discharge pipe
A device for floating and conveying a plate-shaped object in a non-contact state using the fluid described in 2. (3) A device for floating and conveying a plate-shaped body in a non-contact state using the fluid according to claim 1, in which the orifice of the discharge pipe is a shielding plate having a plurality of nozzle holes. (4) A device for floating and conveying a plate-shaped body in a non-contact state by the fluid according to claim 1, in which the orifice of the discharge pipe is a shielding plate made of a foam having continuous pores.