JP2001278435A - Lifting carrying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lifting carrying device with excellent safety and easy maintenance used to raise a solid such as waste in a waste treatment plant. SOLUTION: A gear device 18 is installed on a carrier 12 for loading the solid in the waste treatment plant, and an inclined worm shaft 17 is provided. A worm groove of the gear device is threadedly engaged with a worm of the worm shaft. The worm shaft is rotated, and the carrier is obliquely lifted and transferred.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting and lowering apparatus used for lifting solid matter such as waste and fuel in a waste treatment plant for treating waste by incineration or melting.

[0002]

2. Description of the Related Art There is a waste treatment plant of this type in which waste is conveyed to an incinerator constituted by a rotary kiln or the like to be incinerated and melted. In this type of waste treatment plant, the incinerator is installed diagonally, and is provided with an inlet at a relatively high position, for example, at a height of about 20 m from the ground, for charging solids such as waste and fuel. I have. Therefore, in order to throw solids into the incinerator, an ascending and descending transport device for repeatedly lifting the solids to the entrance of the incinerator is required.

[0003] A conventional lifting and lowering apparatus includes a bucket for storing solids, a wire connected to the bucket, and a winch for winding the wire. The winch is driven to drive the bucket through the wire. It is something to lift.

[0004]

In the conventional lifting and lowering apparatus, if the wire breaks, the bucket may fall and cause a serious accident. Therefore, sufficient care must be taken in managing the wires, and there is a problem in safety.

[0005] Also, the wire wears so quickly that it must be replaced from time to time. In particular, in order to ensure safety, the number of wire replacements must be increased. Therefore, maintenance is not easy.

SUMMARY OF THE INVENTION An object of the present invention is to provide a highly safe and easy-to-maintain lifting and lowering transport device used for lifting solids such as waste to a high position in a waste treatment plant. .

[0007]

SUMMARY OF THE INVENTION According to one aspect of the present invention, there is provided a lifting apparatus used for lifting solids in a waste treatment plant, comprising: a long inclined worm shaft having a worm; And a gear device having a worm groove screwed to the worm and coupled to the transport device, and rotating the worm shaft to transport the transport device. As a result, an ascending / descending transport device is obtained.

[0008] A guide for guiding the movement of the carrier may be provided.

[0009] The guide may have a rail parallel to the worm shaft, and the transporter may include a carriage movable along the rail, and a bucket supported by the carriage and containing a solid material.

[0010] The transporter may include a bucket tilting device coupled to the truck and the bucket for tilting the bucket with respect to the truck.

[0011] The gear device may be mounted on the cart.

[0012] A plurality of the gear devices may be provided.

[0013] The worm shaft may further include a support device for supporting an intermediate portion in a longitudinal direction of the worm shaft.

The gear device is fitted on the peripheral surface of the worm shaft without covering the lower surface, and the support device is opposed to and supports the lower surface of the peripheral surface of the shaft. May have support.

[0015] The shaft support may include a worm wheel device meshed with the worm on a lower surface side of a peripheral surface of the worm shaft.

The worm wheel device includes a movable endless belt having a flat portion facing the worm shaft and extending in parallel with the worm shaft, and a plurality of belts projecting outward from the endless belt at the same pitch as the worm. And a plurality of the teeth may be simultaneously inserted into the valley of the worm.

[0017] The worm wheel device may include a belt support for supporting the flat portion.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1-3, a description will be given of a lifting and lowering transport device according to an embodiment of the present invention.

This lifting / lowering apparatus is generally called a "skip hoist", and is used to repeatedly lift solids such as waste and fuel up to the entrance of an incinerator (not shown) in a waste treatment plant. It is assumed that the incinerator is installed diagonally, so that its entrance is at a relatively high position, for example about 20 m above the ground.

A pair of rails 11 extending from the entrance of the incinerator to the ground at an inclination angle of about 50 degrees are laid on the frame portion 10 of the skip hoist. This rail 11
A transporter 12 for loading and transporting solids is placed on the transporter. The transporter 12 includes a carriage 13 that moves using the rail 11 as a guide, and a bucket 14 that is mounted on the carriage 13 in a tiltable manner and stores solids such as waste and fuel. Between the cart 13 and the bucket 14, when the solid matter is introduced into the entrance of the incinerator, the bucket 1
An air cylinder device 16 serving as a bucket tilting device for tilting 4 is provided.

A long worm shaft 17 extending parallel to the rail 11, that is, inclined, is rotatably provided on the side of the truck 13. The worm shaft 17 has a worm formed by threads and valleys on the peripheral surface over substantially the entire length.

The carriage 13 has a plurality of, for example, three gear devices 18 fixedly mounted on one side thereof according to the load weight. As shown in FIG. 4, each gear device 18 is provided on the peripheral surface of the worm shaft 17 without covering the lower surface side of the worm shaft.
It has a fitting groove 19 for fitting so as to cover about four. On the inner surface of the fitting groove 19 of the gear device 18, a number of worm grooves 21 screwed to the worm of the worm shaft 17 are provided.
Are formed. Worm shaft 17 and gear device 1
8 together form a so-called worm gear.

When the worm shaft 17 is rotated, the gear device 18 follows the screwing of the worm and the worm groove 21.
The trolley 13 moves along the rail 11. Therefore, the bucket 14 is transported up and down.

The worm shaft 17 may bend because it is long. Therefore, a supporting device 22 for supporting the worm shaft 17 at several points in the middle thereof in the longitudinal direction is provided. Thereby, the worm shaft 17 is supported by dispersing the load. As the length of the worm shaft 17 increases, the number of the support devices 22 increases.

As shown in detail in FIG. 5, the support device 22 includes a shaft support 23 facing the lower surface of the worm shaft 17 and a support elastically supporting the shaft support 23 by a compression coil spring 24. And a mounting device 26. The support mounting device 26 is fixed to the frame portion 10 of the skip hoist by bolts or the like.

As shown in FIG. 5, the shaft support 23 includes a worm wheel device 27 meshed with the worm on the lower surface side of the peripheral surface of the worm shaft 17. As shown in FIG. 6, the worm wheel device 27 includes a runnable endless belt 28 having a flat portion facing at least the worm shaft 17 and extending at least on the upper surface thereof, and an endless belt 28 having the same pitch as the worm. And a plurality of plate-like teeth 29 protruding outward from the upper surface. The plurality of teeth 29 are simultaneously inserted into the valleys of the worm of the worm shaft 17 when they are located on the flat portion of the upper surface of the endless belt 28. Worm shaft 17 and worm wheel device 27
Together form a so-called worm gear.

As shown in FIG. 7, the endless belt 28 is formed by connecting a number of plate-like parts 31 having teeth 29 to each other by pins 32 so as to be rotatable. In order to suppress the bending of the flat portion on the upper surface of the endless belt 28, in addition to the front roller 33 and the rear roller 34, some intermediate rollers 36 serving as a belt support are provided. Thus, the endless belt 2
The load applied to No. 8 is dispersed.

Next, the operation of actually transporting solid matter such as waste will be described.

The transporter 12 is stopped at the lower end of the rail 11, and the solids are stored in the bucket 14. Thereafter, the worm shaft 17 is continuously rotated in one direction by, for example, an inverter motor (not shown). Since the worm shaft 17 and the gear device 18 are screwed together, the transporter 12 is sent upward along the rail 11. When the conveyor 12 reaches the entrance of the incinerator, the worm shaft 1
The rotation of 7 is stopped, the air cylinder device 16 is driven, the bucket 14 is tilted, and the solid is thrown into the entrance of the incinerator. Thereafter, the bucket 14 is returned to the original posture, and the worm shaft 17 is continuously rotated in the opposite direction. Thereby, the transporter 12 is returned downward along the rail 11. When the conveyor 12 reaches the lower end of the rail 11, the rotation of the worm shaft 17 is stopped. When the worm shaft 17 is rotating, the endless belt 28 of the worm wheel device 27 travels accordingly.

According to the above-described lifting and lowering transfer device, the transfer device 12 is screwed into the worm shaft 17 and the gear device 18.
Since it moves up and down, it is excellent in safety and maintenance is easy. Furthermore, since the worm shaft 17 is appropriately supported by the support device 22, the worm shaft 17
Is prevented even if it is long. In addition, since the supporting device 22 constitutes a worm gear in cooperation with the worm shaft 17, the worm shaft 1
The friction against 7 is kept low.

The worm shaft and the supporting device may be provided on both sides of the transporter, and the worm shafts may be configured to rotate synchronously. An equivalent function can be obtained by screwing a well-known circular worm wheel to the worm shaft.

[0032]

As described above, according to the present invention,
It is possible to provide an ascending / descending transport device that is excellent in safety and easy to maintain and is used for lifting solids such as waste to a high position in a waste treatment plant.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a lifting and lowering transport device according to an embodiment of the present invention.

FIG. 2 is a schematic plan view of the lifting / lowering transport device of FIG. 1;

FIG. 3 is a schematic front view of the lifting and lowering transport device of FIG. 1;

FIG. 4 is a perspective view of a gear device used in the lifting / lowering transport device shown in FIGS. 1 to 3;

FIG. 5 is a schematic enlarged view of only a main part of the lifting / lowering transport device shown in FIGS. 1 to 3;

FIG. 6 is a schematic configuration diagram of a worm wheel device used in the lifting / lowering transport device shown in FIGS. 1 to 3;

FIG. 7 is an enlarged perspective view of a portion A of the worm wheel device of FIG. 6;

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 frame portion of skip hoist 11 rail 12 transporter 13 trolley 14 bucket 16 air cylinder device 17 worm shaft 18 gear device 19 fitting groove 21 worm groove 22 support device 23 shaft support 24 compression coil spring 26 support mounting device 27 worm wheel device 28 Endless belt 29 Teeth 31 Plate part 32 Pin 33 Front roller 34 Rear roller 36 Intermediate roller

Claims (10)

[Claims] 1. A lifting and lowering device used to lift solids in a waste treatment plant, comprising: a long inclined worm shaft having a worm; a transporter for loading and transporting the solids; A gear device having a worm groove screwed to the worm and coupled to the carrier, wherein the worm shaft is rotated to transfer the carrier. 2. The lifting and lowering transport device according to claim 1, further comprising a guide for guiding the movement of the transporter. 3. The guide has a rail parallel to the worm shaft, and the transporter includes a carriage movable along the rail, and a bucket supported by the carriage and containing a solid material. 3. The lifting / lowering transport device according to 2. 4. The lifting and lowering transport device according to claim 3, wherein the transporter includes a bucket tilting device coupled to the trolley and the bucket for tilting the bucket with respect to the trolley. 5. The lifting device according to claim 3, wherein the gear device is mounted on the carriage. 6. The elevating and lowering transport device according to claim 1, further comprising a support device that supports an intermediate portion in a longitudinal direction of the worm shaft. 7. The gear device is fitted to the peripheral surface of the worm shaft without covering the lower surface, and the support device is opposed to and supports the lower surface of the peripheral surface of the worm shaft. 7. A shaft support having a rotating shaft support.
The lifting / lowering transport device according to item 1. 8. The lifting and lowering transport device according to claim 7, wherein the shaft support includes a worm wheel device meshed with the worm on a lower surface side of a peripheral surface of the shaft. 9. The endless belt having a flat portion facing the worm shaft and extending parallel to the worm shaft, and protruding outward from the endless belt at the same pitch as the worm. The lifting / lowering apparatus according to claim 8, further comprising a plurality of teeth, wherein the plurality of teeth are simultaneously inserted into the valleys of the worm. 10. The lifting and lowering transport device according to claim 9, wherein the worm wheel device includes a belt supporting portion that supports the flat portion.