JPS6312092Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to an air film conveyor that blows air between the conveyed object and the moving surface of the conveyor to form an air film to move the conveyed object. This invention relates to a structure that opens and closes an air outlet formed on a surface.

Technical background In open-hole air film conveyors, where small holes are made on one side of the moving surface of the conveyor to blow out air, air is blown out even from areas where there is no conveyed material, resulting in high air consumption. Therefore, there is a device that saves energy by opening the spout in that area only when the object is being moved, and blowing out air.

Prior art and its problems Conventionally, there is a ball valve type as shown in FIG. This is done by placing a ball 23 in an air outlet 22 formed on the moving surface of the conveyor 21, urging the ball 23 toward the air outlet 22 with a coil spring 24, and causing a part of the ball 23 to protrude above the moving surface. It is something. Reference numeral 25 is a valve seat formed at the opening of the spout 22, 26 is an air inlet, 27 is a carrier, and 28 is a carrier.

When the carrier 27 is not positioned above the ball 23, the ball 23 is moved to the spout 2 by the coil spring 24.
2, it seats on the valve seat 25 and closes the spout 22. When the carrier 27 comes over the ball 23, the load of the carrier 27 and the object 28 acts against the spring force of the coil spring 24, pushing the ball 23 down and opening the spout 22, blowing out air. An air film is formed between the carriage 27 and the moving surface.

In the structure described above, since the carrier 27 directly pushes down the ball 23 to open the valve, the frictional resistance is large. In addition, the carrier 27 pushes down the ball 23,
Since the ball 23 is moved while rolling while in contact with the ball 23, there is a problem that the ball 23 and the valve seat 25 are worn out.

Technical Problem The technical problem of the present invention is to detect the presence of a transported object without contact and open only the spout in that area when the transported object moves.

Technical Means The technical means of the present invention taken to solve the above technical problem are as follows. In other words, (a) the valve body is made of a magnet, (b) the valve body is shaped so that it does not protrude above the moving surface, (c) a conveyor is placed on the conveyor's moving surface, and (d) the valve is placed on the conveyor. Attach a magnet so that it repels the polarity of the body.

Action of technical means The operation of the above technical means is as follows.

When the carrier is not located above the spout, the magnet is pushed up by air pressure and sits on the valve seat, closing the spout. At this time, the magnet does not protrude from the spout. When the carrier is placed above the spout, the magnet attached to the carrier and the valve body formed by the magnet repel each other.
The valve body is pushed down to open the spout and blow out air to form an air film between the carrier and the moving surface.

Therefore, since the valve body protrudes from the moving surface,
There is no frictional resistance between the valve body and the carrier. Furthermore, since the valve element opens without contact due to the repulsive force of the magnet with the carrier, there is no wear on the valve element or valve seat.

Unique effects The present invention has the following unique effects.

In this invention, in addition to the air film, the repulsive force of the magnet also acts to push the transported object upward.

In the case where the valve body protrudes from the spout, there is a risk of fluid leaking due to wear of the valve body and valve seat, or the valve body flying out from the spout, but with this invention, the valve body and the conveyor do not come into contact with each other. There is no wear, no fluid leaks, and no valve bodies popping out.

DESCRIPTION OF EMBODIMENTS A specific embodiment of the present invention will be described below (see FIG. 1).

The conveyor 1 has an air passage 2 inside, an air introduction port 3 at the bottom, an air jet port 4, and a valve chamber 5 having a larger diameter than the jet port 4 at the top. A valve seat 6 is formed by the stepped portion of the spout 4 and the valve chamber 5. A valve body 7 made of a magnet is placed within the valve chamber 5. The upper part of the valve body 7 is N.
The lower pole is the south pole. A falling-off prevention member 8 is attached to the lower end of the valve chamber 5 to prevent the valve body 7 from falling off. A conveyor platform 11 incorporating magnets 10 is placed on the moving surface 9 of the conveyor 1. The magnet 10 has an S pole at the top and a N pole at the bottom so as to repel the polarity of the valve body 7.
The object to be transported 12 is placed on the transport platform 11.

The air flowing in from the air inlet 3 flows through the air passage 2.
It flows into the valve chamber 5 through the valve chamber 5. When the carrier 11 is not located above the air outlet 4, the valve element 7 is pushed up by air pressure and seats on the valve seat 6, closing the outlet 4 and preventing air from flowing out. There is a transport platform 11 above the spout 4.
When the valve body 7 comes, the magnet 10 incorporated in the carrier 11 and the magnet of the valve body 7 repel each other, and the valve body 7 is pushed down by the repulsive force and separated from the valve seat 6, opening the spout 4 and blowing out air. An air film is formed between the carrier 11 and the moving surface 9.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an air film conveyor according to an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional air film conveyor. DESCRIPTION OF SYMBOLS 1... Conveyor, 4... Air outlet, 6... Valve seat, 7... Valve body, 9... Moving surface, 10... Magnet,
11...Transportation platform.

Claims (1)

[Scope of utility model registration request] An air jet is formed on the moving surface of the conveyor, a valve seat is formed in the opening of the jet, and a valve body is placed on the jet nozzle. An air film conveyor with a shape that does not protrude upwards, a transport platform placed above the moving surface of the conveyor, and a magnet attached to the transport platform to repel the polarity of the valve body.