JPH0725436A - Tube conveyor - Google Patents

Abstract

PURPOSE:To smoothly run a scraper without being hooked on the inside face of a tube by providing plural rollers, which roll along the running direction of a chain, in the circumferential edge part of the scraper while projecting their rotational faces to the outside of the outer circumference of the scraper. CONSTITUTION:A scraper 8 is installed on a face on the front side of a mounting disk 9, which is welded in a chain 5, by a bolt 10. Four rollers 11, whose rotational faces project to the outside of the scraper 8, are installed in the circumferential edge part on the rear face of the scraper 8. These rollers 11 are installed in a bracket 12 arranged on the rear face of the scraper 8 by means of a mounting shaft 13 and a pin 14 so as to rotate along the running direction of the chain 5. In this way, a stop, which is caused when the scraper 8 is hooked on the inside wall of the tube 1, of operation can be prevented even when a bending diameter of the tube 1 is small.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube conveyor used for carrying earth and sand from an underground excavation site to the ground.

[0002]

2. Description of the Related Art A tube conveyor is one in which a chain that circulates around a sprocket wheel is provided in a tube, and a scraper is attached to the chain, and it can be used by bending it from a horizontal direction to a vertical direction. Since it can be done, it is used when the earth and sand are transported from the underground excavation site to the ground.

[0003]

By the way, in the conventional tube conveyor, if the bending diameter of the tube is reduced,
In many cases, the scraper hits the inner surface of the tube at the bent portion, and the scraper is caught on the inner surface of the tube, which hinders the running of the chain.

For this reason, conventionally, since the bending diameter of the tube cannot be made very small, there is a problem that a large installation space is required.

Further, conventionally, since the chain is attached to the center position of the scraper, the chain cannot be bent with a too small diameter, which requires a large sprocket wheel and causes a problem that the tube conveyor becomes large. is there.

Therefore, according to the present invention, even if the bending diameter of the tube through which the chain circulates is reduced, the scraper travels smoothly without being caught on the inner surface of the tube.
Another object of the present invention is to provide a tube conveyor that can bend a chain with a small diameter.

[0007]

In order to solve the above-mentioned problems, the present invention provides a tube conveyor in which a chain that is circulated around a sprocket wheel is provided in a tube, and a scraper is attached to the chain. A plurality of rollers, which roll along the traveling direction of the chain, are attached to the peripheral edge of the scraper in a state in which the rotation surface projects outside the outer periphery of the scraper.

Further, in a state where the chain is hung on the sprocket wheel, the mounting position of the chain and the scraper is deviated from the center position of the scraper toward the rotation axis of the sprocket wheel.

[0009]

[Function] Even if the bending diameter of the tube is reduced so that the scraper comes into contact with the inner surface of the tube at the bent portion, a roller that rolls along the running direction of the chain is provided at the peripheral edge of the scraper, and the rotation surface is the outer circumference of the scraper. The plurality of rollers are attached so as to project to the outside of the tube, and the rollers rotate while contacting the inner surface of the tube, so that the scraper does not get caught on the inner surface of the tube.

If the mounting position of the chain and the scraper is deviated from the center position of the scraper in the direction of the rotation axis of the sprocket wheel, the bending diameter of the chain will be reduced by the amount deviated, thus reducing the diameter of the sprocket wheel. can do.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 to 6 exemplify the tube conveyor according to the present invention used for carrying earth and sand from an excavation site in the underground A to the ground B.

The tube conveyor is formed by two parallel cylindrical tubes 1 and 2 having a conveying path, and the two tubes 1 and 2 are a horizontal portion installed in an underground A portion and an above ground B portion. , The underground part A and the above-ground part B are connected to each other via a bent part.

Sprocket wheels 3 are installed in the rear of the horizontal portion of the underground A of the above-mentioned two tubes 1 and 2 and in front of the horizontal portion of the ground B, respectively, with their axes of rotation being vertical. Is equipped with a driving motor 4.

Inside the two tubes 1 and 2, there is provided a chain 5 which hangs around the sprocket wheel 3 and circulates.

Out of the two tubes 1 and 2, a tube 1 on the outward path, that is, the underground A portion of the tube 1 in which the chain 5 runs from the underground A to the ground B, has an earth and sand input port 6. Has been formed. In addition, the tube 1 on the outward path
An earth and sand discharge port 7 is formed in a portion B above the ground.

A circular scraper 8 of a size that fits in the tubes 1 and 2 is attached to the chains 5 running in the tubes 1 and 2 at predetermined intervals, in the illustrated embodiment, every other link. Has been. The scraper 8 welds the mounting disc 9 to the chain 5 and
Is attached to the front surface of the chain, that is, the front surface of the chain 5 in the traveling direction by bolts 10. The mounting disk 9 is fixed at a position offset from the center position of the scraper 8 in the direction of the rotation axes of the sprocket wheels 3 and 4, that is, at an eccentric position.

Further, four rollers 11 are attached to the peripheral portion of the rear surface of the scraper 8 in a state where the rotating surface projects to the outside of the scraper 8. This roller 11
Bracket 12 provided on the rear surface of scraper 8
The chain 5 is mounted by the mounting shaft 13 and the pin 14 so as to roll along the traveling direction of the chain 5.

On the front surface of the scraper 8, the tube 1
There is provided a sliding contact plate 18 that contacts the inner surface of the. The sliding contact plate 18 is fixed to the scraper 8 by a pressing plate 15, and the pressing plate 15 and the scraper 8 are fixed by screws 16. The sliding contact plate 18 is made of an elastic material such as rubber, urethane, or synthetic resin, and the sliding contact plate 18 moves while being in contact with the inner surface of the tube 1 so that the inner surface of the tube 1 and the scraper 8 are separated from each other. It is possible to prevent dirt and sand from being caught between the tubes, so that smooth operation is ensured and the inside of the tube 1 is also cleaned.

An air blowing device 17 for blowing air toward the chain 5 and the scraper 8 is installed above the discharge port 7 provided on the ground B portion of the tube 1 on the outward path, and this air is used to blow the chain 5 and the scraper. The earth and sand adhering to 8 is removed so that the earth and sand are not caught in the sprocket wheel 3 and the earth and sand are not transferred to the tube 2 on the return path side.

[0021]

As described above, according to the present invention, in the bent portion of the tube, the roller of the scraper makes contact with the inner surface and rotates, and the chain smoothly circulates, so that the bent diameter of the tube is small. However, it is possible to prevent the scraper from being caught on the inner wall of the tube and stopping the operation.

Further, since the bending diameter of the chain can be reduced by eccentricly attaching the scraper to the chain from the center position of the scraper, it is possible to reduce the diameter of the sprocket wheel to be used, and to reduce the diameter of the tube conveyor. Miniaturization is possible.

[Brief description of drawings]

FIG. 1 is an overall front view showing an example of a tube conveyor according to the present invention.

FIG. 2 is a plan view of a tube portion.

FIG. 3 is a left side view of the tube portion.

FIG. 4 is a plan view of an input port portion.

FIG. 5 is a front view of a discharge port portion.

FIG. 6 is a plan view of a discharge port portion.

[Explanation of symbols]

 1, 2 Tube 3 Sprocket Wheel 4 Motor 5 Chain 6 Input Port 7 Ejection Port 8 Scraper 9 Mounting Disk 10 Bolt 11 Roller 12 Bracket 13 Mounting Shaft 14 Pin 15 Protective Plate 16 Screw 17 Air Blowing Device

Claims (2)

[Claims] 1. In a tube conveyor in which a chain which is circulated around a sprocket wheel is provided in a tube and a scraper is attached to the chain, a roller rolling along the running direction of the chain is provided at a peripheral portion of the scraper. The tube conveyor is characterized in that a plurality of rotary surfaces are attached to the scraper so as to project to the outside of the outer periphery of the scraper. 2. The tube according to claim 1, wherein, in a state where the chain is hung on a sprocket wheel, a mounting position of the chain and the scraper is offset from a center position of the scraper toward a rotation axis of the sprocket wheel. Conveyor.