JPH0716644Y2 - Conveyor belt for vacuum conveyor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an improvement of a conveyor belt for a vacuum conveyor.

[Conventional technology]

The vacuum conveyor is designed to discharge the air in the plenum chamber with a blower or the like to create a weak vacuum state, and convey the lightweight object while adsorbing it onto the surface of the conveyor belt through the adsorption holes provided in the conveyor belt. Therefore, it has a great advantage in that it can be transported not only in the horizontal direction but also in the vertical direction. The conveyor belt of a vacuum conveyor is usually constructed by connecting a large number of belt pieces with connecting pins, and each belt piece is provided with a suction hole for sucking an object to be conveyed.

The conventional suction holes have a shape as shown in FIG. That is, a circular through hole is formed through the belt piece (31) at a substantially right angle to the transport surface (32), and the edges on the transport surface (32) side and the back surface (33) side are shown in FIG. 5 (a). Chamfering is performed as described above, or R-finishing is performed as shown in FIG. 5 (b) to form suction holes (34).

[Problems to be solved by the device]

Therefore, the conventional belt piece (31) has a suction hole (3
The chamfered portion (35) and the curved portion (36) are present on the edge of the transportation surface (32) side of 4), and the suction hole (34) is present on the transportation surface (32).
Is larger than the diameter (d) of the inner wall. Therefore, when the transported object (37) is attracted to the transport surface (32), the transported object (37) must be attracted in a larger area, and there is a drawback that a predetermined suction force cannot be obtained. . Further, there is a drawback that a gap is likely to be formed between the transported object (37) and the transportation surface (32).

The present invention has been made in view of the above circumstances, and an object thereof is to efficiently and surely adsorb an object to be conveyed, and thus to supply drive power to a blower that discharges air in the plenum chamber. It is an object of the present invention to provide a conveyor belt for a vacuum conveyor that can be reduced.

[Means for Solving the Problems]

In order to achieve the above object, in the present invention, the diameter of the suction hole on the side of the transport surface is made smaller than the inner diameter.

In addition, a corner portion that is substantially perpendicular to the transport surface may be provided on the edge of the suction hole on the transport surface side.

Further, it is also possible to form a flat surface on the portion of the transport belt configured as described above that comes into contact with the belt guide and to run while sliding the flat surface on the belt guide.

[Action]

With the above-described structure, the diameter of the intake hole on the transfer surface is made smaller than the inner diameter, so that the air flow becomes the fastest at the end portion on the transfer surface side of the intake hole that adsorbs the object to be transferred. In addition, since the diameter of the downstream side is widened to improve the flow of the air to be sucked in, the suction force is not weakened. Therefore, the suction force of the air effectively acts on the transported object, and this can be efficiently sucked.

In addition, if a flat surface is formed on the part of the conveyor belt that contacts the belt guide, there will be almost no gap between the conveyor belt and the belt guide, and most of the air will be sucked in through the suction holes. Can be used.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

1 to 4 show a vacuum conveyor using a conveyor belt according to the present invention. The vacuum conveyor (1) is provided with a plenum chamber (2) having a rectangular cross section and one surface of which is open, and a conveyor belt (3) movably provided on the opening surface of the plenum chamber (2). The other three sides of the plenum chamber (2) are sealed,
It is connected to a blower (not shown) so that the air inside the plenum chamber (2) is discharged by the blower.

Inside both side walls of the plenum chamber (2), rod-shaped belt guides (4) are attached along the longitudinal direction,
Another belt guide (5) extending parallel to the belt guide (4) is attached to the central portion. The central belt guide (5) is supported by columns (6) fixed at one end to the bottom wall of the plenum chamber (2).

The conveyor belt (3) is not integrated, but is composed of a number of belt pieces (7) connected in the longitudinal direction and the width direction as shown in FIG.

Each belt piece (7) has a central flat plate-shaped transport section (8).
And a cylindrical connecting part (9) formed before and after that, and a plurality of connecting parts (9) are arranged at intervals in the width direction. A hole (10) for a connecting pin is provided through each connecting portion (9). By aligning these holes (10) and inserting the connecting pin (11) from one end, the belt piece (7) is formed. ) Is rotatably connected.

In this embodiment, the belt piece (7) and the connecting pin (1
1) is made of hard synthetic resin. However, it goes without saying that it can be formed of metal.

The belt piece (7) other than the both ends of the conveyor belt (3) has a plurality of connecting parts (9) at the front and rear ends, respectively, but the belt pieces (7) at both ends are the outermost connecting parts (9). 9), and the outermost portion is a flat plate-shaped conveyance section (8)
It is only. Thus, the flat surface (8a) contacting the belt guide (4) is formed on the back surface of the outermost portion. The width of the flat surface (8a) can be appropriately set according to the width of the belt guide (4).

The transfer section (8) has a circular suction hole (12) for sucking the transferred object.
Are formed through. The suction hole (12) has the first cross-sectional shape
As shown in the figure, the outer surface, that is, the edge on the side of the transport surface (15) is formed with a corner portion (17) forming a right angle to the transport surface (15). Further, the inner surface, that is, the edge on the back surface (16) side is obliquely cut out, and a taper portion (18) is provided. Therefore, the suction holes (12) have the same diameter (d) from the conveying surface (15) to the tapered portion (18), and the diameter of the conveying surface (15) does not increase. Taper part (1
It has come to increase to 8).

Reinforcing protrusions (13) are provided in parallel on the back surface of the transport section (8). Further, one of the plurality of connecting portions (9) of the belt pieces (7) arranged in the width direction of the conveyor belt (3), that is, one connecting portion among the connecting portions (9) in which one connecting pin (11) is inserted. A window (14) is formed in (9) by cutting a part thereof. The size of the window (14) may be arbitrarily set as long as the connecting pin (11) is exposed therefrom. The exposed part of the connecting pin (11) through the window (14) is melted and deformed by contact with a heated soldering iron, thus preventing the connecting pin (11) from coming off. .

Next, the operating state of the vacuum conveyor (1) having the above configuration will be described.

First, a blower (not shown) is operated to discharge the air in the plenum chamber (2), and the plenum chamber (2) is discharged.
Reduce the air pressure inside. Then, outside air flows into the plenum chamber (2) through the adsorption holes (12),
By the suction force generated at this time, the lightweight object (19) to be conveyed can be adsorbed and held. By running the transport belt (3) in this state, the transported object (19) can be transported not only horizontally but also vertically.

When air enters the adsorption hole (12) from the outside, the adsorption hole (12)
Since the edge of the transfer surface (15) on the transfer surface (15) side is perpendicular to the transfer surface (15) due to the corner portion (17), the inflowing air will flow into the circular area of diameter (d), and the predetermined adsorption Can generate power. Further, for the same reason, there is no possibility that a gap will be created when the transported object (19) is attracted, and this can be reliably attracted.

Further, since the flat surface (8a) is provided at both ends of the conveyor belt (3), the flat surface (8a) is in close contact with the surface of the belt guide (4), and a large gap is not formed in this portion. Therefore, almost all the air flows in only from the adsorption holes (12), the adsorption force of the transported object (19) is increased, and the operation efficiency is improved.

In the above description, the edge of the suction hole (12) on the back surface (16) side is the tapered portion (18), but it goes without saying that it may be formed in a curved shape. Further, the hole is not limited to the cylindrical hole, and it may be a tapered hole. In this case, it is necessary to dispose a portion having a small diameter on the conveying surface (15) side.

[Effect of device]

As is clear from the above description, the vacuum conveyor conveyor belt (3) of the present invention can efficiently and surely adsorb the object (19) to be conveyed, and thus the air in the plenum chamber (2) can be absorbed. It has excellent practical effects, such as the ability to reduce the drive power of the blower that is discharged.

In addition, if a flat surface (8a) is formed on the portion of the conveyor belt that contacts the belt guide (4), the plenum chamber (2)
Most of the inflow of air into the inside occurs only from the adsorption holes (12), so that the above effect can be further improved.

[Brief description of drawings]

1 is a partially enlarged sectional view of a belt piece used for a conveyor belt for a vacuum conveyor according to the present invention, FIG. 2 is a partial bottom view of the conveyor belt, and FIG. 3 is a front view of the belt piece shown in FIG. 4 and 5 are partially cutaway perspective views of the vacuum conveyor, and FIG. 5 is a partially enlarged sectional view of a conventional belt piece. (1) …… Vacuum conveyor (2) …… Plenum chamber (3) …… Conveyor belt, (4) (5) …… Belt guide (7) …… Belt piece, (8) …… Conveyor (8a) ...... Flat surface, (9) ...... Connecting part (10) ...... Connecting pin hole, (11) ...... Connecting pin (12) …… Suction hole, (14) …… Window (15) …… Conveying surface , (16) …… Back surface (17) …… Corner, (18) …… Tapered part (19) …… Transported object

Claims (3)

[Scope of utility model registration request] 1. A conveyor belt for a vacuum conveyor, which is formed by connecting a number of belt pieces each having an intake hole, wherein a diameter of an end edge of the intake hole on a transfer surface side is smaller than an inner diameter thereof. Characteristic vacuum conveyor conveyor belt. 2. The conveyor belt for a vacuum conveyor according to claim 1, wherein a corner portion which is substantially perpendicular to the conveyor surface is provided at an edge of the intake hole on the conveyor surface side. 3. A flat surface is formed at a portion of the conveyor belt which is in contact with the belt guide, and the flat surface is configured to run while sliding on the flat surface. Conveyor belt for vacuum conveyor.