JPH0228405A - Low speed roller chute - Google Patents

Abstract

PURPOSE:To prevent cargo from colliding or from being damaged by providing the inside of a rubber-lined roller with ratchet claws so that the ratchet claws engage with a ratchet wheel when the roller speed exceeds the speed of the ratchet wheel driven at a constant speed. CONSTITUTION:A ratchet wheel 8 is driven with a sprocket 11 and a chain 18 at a constant speed. Cargo drops on a rubber-lined roller 5 of a roller conveyor. Here, when the cargo dropping speed exceeds the speed of the ratchet wheel 8, the ratchet wheel 8 engages with a ratchet claw 10 so that the roller 5 is braked. As a result, cargo is braked by the friction between the lining rubber of the roller 5 and collision is prevented.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention provides a roller chute installed at a steep slope.
This invention relates to a low-speed roller chute that can prevent accidents such as cargo sliding at high speed due to acceleration, colliding, and being damaged.

(Prior art) If the drop is large and the chute length cannot be made long enough, the chute is forced to slope steeply.

The following measures are known as countermeasures against this problem.

1) A spiral chute can increase the length, but is disadvantageous in terms of cost.

2) If a driven conveyor is used, the problem of natural acceleration will be solved, but accumulation on shoes 1 and above will not be possible.

3) There is also a method of using drive rollers only in necessary places, but
The rollers rub the bottom of the load during accumulation.

4) There is a method of inserting deceleration rollers here and there, but the deceleration performance is unstable and light objects will stop.

5) There is also a cascade type that has a stepped shape.

There was another problem, such as damage to the luggage.

(Problems to be Solved by the Invention) In view of the problems of the prior art described above, 1) It is possible to prevent damage to the cargo by preventing collisions due to high-speed sliding of the cargo on a steeply sloped chute in a sorting device, etc.; 2) It is possible to carry 7 kg of cargo on a steep chute.

3) It is possible to eliminate changes in slippage due to changes in the conditions of the load and the chute surface, and to guide the load to the bottom at a stable speed.

The present invention aims to provide a low-speed roller chute that can do the above.

(Means for Solving Problems by the Invention) A plurality of rubber-lined rollers rotatably supported on a fixed support shaft, and a ratchet rotatably supported on the fixed support shaft and connected with a pin to the inner side of each roller. With a ratchet wheel that engages the pawl.

It consists of a sprocket wheel fixed to the side of the ratchet wheel and a chain driven at a constant speed that meshes with the sprocket wheel. When the speed of the roller exceeds the speed of the ratchet wheel, the ratchet pawls engage. This makes it possible to match the chain speed.

(Example) Embodiments of the present invention will be described below based on the drawings.

In FIG. 1, 1 is the main body of the sorting device, and the cargo received on the tray la is sorted by this 1. Once sorted, they are transferred via an introduction chute 2 onto a roller conveyor section 3 with a steep slope. The roller conveyor section 3 is provided with a low-speed roller chute 4, which will be described below, on the steeply sloped roller conveyor section 3, so that it is possible to prevent the cargo from falling rapidly.

The roller on the low-speed roller chute 4 is composed of a rubber-lined roller 5, which is rotatably supported by a shaft 6 via a bearing 7. A ratchet wheel 8 is supported by a shaft 6 via a bearing 9, and is engaged with a pair of ratchet pawls 10 that are connected to the inner end of the rubber-lined roller 5 by a pin, facing each other.

11 is the sprocket wheel, ratchet wheel 8
It is supported by a support member 12 that protrudes laterally from the main body.

The sprocket wheel 11 meshes with an endless chain 13 at the bottom. The chain 13 is driven at a constant speed by a driving sprocket 14 driven by a motor (not shown). The chain 13 is stretched endlessly between the sprocket wheels 15 and 16, and there is a tension device in the middle! 17 to maintain a constant tension. Reference numeral 18 denotes a chain rail provided on the frame 19, and the chain 13 that engages with the sprocket wheel 11 moves on this rail 18 to ensure engagement with the sprocket wheel 11.

Because of the above configuration, it is suitable as, for example, sorting machine chute equipment, general accumulation conveyor equipment, or down conveyor acceleration and sudden running prevention equipment.

(Function) The drive sprocket 14 is driven by a motor (not shown),
The chain 13 is driven in the direction of the arrow in FIG. 1 at a desired speed. Then, the ratchet wheel 8 also rotates via the sprocket wheel 11.

On the other hand, when the accelerated load 2o is sent on the steeply sloped roller conveyor section 3 and reaches the rubber-lined roller 5 of the low-speed roller chute 4, the ratchet wheel 8, which is driven at a lower speed than the speed of the load 20, ratchet pawl 10
mesh with each other, applying a braking force to the rubber-lined roller 5 and decelerating it. In other words, the ratchet wheel is rotatable in the reverse direction, but cannot rotate at a speed higher than the speed of the chain 13. At this time, the load 20 is prevented from slipping on the rubber-lined roller 5 by the friction of the rubber, and immediately settles down to a speed regulated by the chain 1343.

As a result of the above, the cargo descends slowly at a predetermined speed, and even if there is a cargo 20 ahead, a sudden collision is prevented, and as a result, damage to the cargo can be prevented.

Next, even if unloading is delayed and a large number of loads accumulate on the low-speed roller chute 4, the rollers 5 at the bottom of the load will stop rotating due to the action of the ratchet mechanism (the ratchet wheel is spinning idly), and the load will stop rotating. Do not rub the bottom of the bag for a long time or apply unnecessary pressure to the load, which may cause damage to the load.

(Effects) Rubber lining is applied to the surface to improve the coefficient of friction, and a ratchet mechanism is attached to the roller, and the ratchet mechanism is rotated at a constant speed by a chain, so that the rapidly descending load can be transported by the low-speed roller shoe 1. It became possible to slow down in some areas and prevent slipping.

Therefore, even if a steep slope is forced due to space constraints, the cargo can be transported without being damaged.

[Brief explanation of the drawing]

Figure 1 shows a roller conveyor equipped with a low-speed roller chute. FIG. 2 is a partially cutaway sectional view of the rubber-lined roller of the low-speed roller chute section. FIG. 3 is a partial longitudinal sectional view of the rubber-lined roller. FIG. 4 is a sectional view taken along the line rV-rV in FIG. 3. In the figure: Sorting device main body 1a Tray introduction chute 3 Roller conveyor part roller chute Roller shaft with rubber lining 7 Bearing ratchet wheel bearing 10 Ratchet pawl sprocket wheel support member Sprocket sprocket wheel for endless chain drive Sprocket wheel tensioning device 18 Rail frame for chain
20 More than baggage Applicant Sumitomo Heavy Industries Co., Ltd. Sub-Agent Patent Attorney Isamu Ohashi Figure 3 Figure 4 U1L... To the throat 1^

Claims (1)

[Claims] a plurality of rubber-lined rollers rotatably supported on a fixed support shaft; and a plurality of rubber-lined rollers rotatably supported on the fixed support shaft;
It consists of a ratchet wheel that engages with a ratchet pawl pin-coupled to the inside of each roller, a sprocket wheel fixed to the side of the ratchet wheel, and a chain that is driven at a constant speed and meshes with the sprocket wheel, A low-speed roller chute characterized in that ratchet pawls engage when the speed of the roller exceeds the speed of the ratchet wheel.