JPH1029712A - Carrier device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and surely prevent the distortion of a mesh conveyor by disposing a flat plate for suppressing the distortion of the mesh conveyor on a rear side of a position for moving the mesh conveyor away from the sprocket of a follower shaft and in a position facing the backside of the mesh conveyor. SOLUTION: A flat plate 10 made of a resin is disposed on the rear side of a position separating the roller chains 2 and 3 of a mesh conveyor from the sprockets 6 and 7 of a follower shaft 8 and in a position facing the backside of the mesh conveyor. The flat plate 10 may be placed in a position always in contact with the backside of the mesh conveyor or in a position having a proper narrow interval. Even if the mesh conveyor is vibrated and distorted immediately after being moved from the sprockets 6 and 7 of the follower shaft 8, which is caused by its high-speed driving, the vibration and distortion thereof are suppressed by contact of a guide bar with the flat plate 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer device, and more particularly to a transfer device using a mesh conveyor.

[0002]

2. Description of the Related Art As is well known, a mesh conveyor, for example, a mesh conveyor 1 as shown in FIG.
A pair of roller chains 2 and 3 (only one roller chain 2 is shown in FIG. 2) and a plurality of guide rods attached at appropriate intervals over both roller chains 2 and 3. 4 and a net 5 which is located between the roller chains 2 and 3 and is installed so as to knit the guide rod 4. The guide rod 4 is used to prevent the conveyed objects on the net 5 from bending and prevent the net 5 from shifting in the width direction.

The mesh conveyor 1 is endless, and one roller chain 2 is engaged with a plurality of sprockets 6 as shown in FIG. 1, and the other roller chain 3 is engaged with another plurality of sprockets 7. ing. Then, when a drive shaft (not shown) is rotated by a required drive source, sprockets 6 and 7 attached to both ends of the drive shaft rotate, whereby the mesh conveyor 1 is driven. In FIG. 2, reference numeral 8 denotes a driven shaft.

[0004] In the transport apparatus having such a configuration, there is not much problem when the apparatus is operated at a low speed, but when the apparatus is operated at a high speed (for example, 10 m / min or more), the mesh conveyor 1 is driven in the arrow direction. The sprockets 6, 7 attached to the driven shaft 8
At the outlet side, i.e., immediately after the roller chain 2 is separated from the sprockets 6, 7, the roller chain bends and rebounds as shown by the dotted line in the figure. As a result, the net 5 bends at the center even if the guide bar 4 is provided. The amount of displacement is larger than the amount of displacement of the roller chain.

[0005] When the net 5 bends largely as described above, the conveyed material on the net 5 jumps up or snakes, and thus may deviate from a predetermined position on the net 5. When recovering from the net 5, the recovery position may be shifted and the recovery may be difficult.

In particular, when an object to be irradiated is conveyed to the irradiation position by this mesh conveyor in an electron beam irradiation apparatus, if the object to be irradiated is shifted from a predetermined position, the irradiation position may be shifted. In addition, if the irradiation object jumps, it may collide with or get caught in the shielding slit of the irradiation part.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to prevent a conveyed object from jumping and meandering by suppressing its deflection as much as possible even when the mesh conveyor is operated at a high speed.

[0008]

According to the present invention, a flat plate for suppressing the deflection of a mesh conveyor is disposed at a position behind a position where the mesh conveyor is separated from a sprocket of a driven shaft and facing a back surface of the mesh conveyor. It is characterized by having done.

Immediately after the roller chain of the mesh conveyor is separated from the sprocket of the driven shaft, the back surface of the mesh conveyor faces the front surface of the flat plate. When the guide rod 4 hits the flat plate, the occurrence of fluttering and bending is suppressed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. According to the present invention, the sprockets 6, 7 of the driven shaft 8 and the roller chain 2 of the mesh conveyor 1,
A resin flat plate 10 is arranged at a position behind the position where the 3 moves away and facing the back surface of the mesh conveyor 1. The flat plate 10 may be always at a position in contact with the back surface of the mesh conveyor, or may be at a position with a suitably small interval.

According to this structure, since the mesh conveyor 1 is driven at a high speed, the mesh 5 flaps immediately after the driven shaft 8 separates from the sprockets 6 and 7, and the net 5 and the guide rod 4 Hits the flat plate 10, the occurrence of flapping and bending is suppressed.

If one or a plurality of discs (made of resin) 11 are attached to the driven shaft 8 as shown in the figure and are rotated integrally with the driven shaft 8, the sprocket 6,
7, the width direction of the mesh conveyor 1 is supported by the disk 11, so that even when the mesh conveyor 1 is driven at a high speed, the bending in the width direction of the mesh conveyor 1 is suppressed. Is good.

Guide rails 12 for the roller chains 2, 3 remote from the sprockets 6, 7 of the driven shaft 8,
When the guide rail 13 is installed with its tip as close to the sprockets 6 and 7 as possible,
The distal end portions of the roller chains 2 and 13 suppress the bending and rebound of the roller chains 2 and 3 separated from the sprockets 6 and 7, which is convenient.

In the present invention, the configuration in which the flat plate 10 is disposed on the driven shaft side is described. However, if necessary, the flat plate 10 may be provided on the drive shaft side, that is, on the outlet side of the mesh conveyor of the drive shaft. . Of course, the disk 11 and the guide rails 12 and 13 may be similarly installed on the drive shaft side.

[0015]

As described above, according to the present invention, the deflection of the mesh conveyor is suppressed at a position behind the position where the mesh conveyor is separated from the sprocket of the driven shaft and facing the back surface of the mesh conveyor. Since the flat plate is arranged, it is possible to easily and reliably avoid the deflection of the mesh conveyor immediately after leaving the sprocket of the driven shaft.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a partial plan view of the mesh conveyor.

[Explanation of symbols]

 Reference Signs List 1 mesh conveyor 2, 3 roller chain 5 net 6, 7 sprocket 8 driven shaft 10 flat plate

Claims (1)

[Claims] 1. A pair of roller chains, a plurality of guide rods attached at appropriate intervals over the two roller chains, and a braided guide rod between the two roller chains. In a transport device that drives a mesh conveyor constituted by a mesh and a sprocket that meshes with the roller chain, the mesh conveyor is located behind a position where the mesh conveyor is separated from the sprocket provided on a driven shaft, A transfer device comprising a flat plate for suppressing the deflection of the mesh conveyor, at a position facing the back surface of the mesh conveyor.