JPH0754358Y2 - Lifting device with idle wheels - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a scraping device for scraping sedimentation and sedimentation in a sewer sedimentation basin or sedimentation scales in scale pits such as steelmaking and rolling mills.

[Conventional technology]

Conventionally, a grab bucket, a bucket elevator, or the like has been widely put into practical use as a device for removing deposited deposits in a sand basin or scale pit.

Grab buckets are not suitable for automated operation because the processing work is intermittent and requires a lot of man-hours.

Since the bucket elevator has a structure in which driving and driven chain sprockets are arranged vertically and the bucket mounted on an endless link chain that is continuously strained is rotated, a device for supplying sand to the bucket or a scale is not provided. It is necessary, and when sand settles or scales are abnormally accumulated, it becomes inoperable due to overload, and extra machinery is required in the pit for recovery, and extra man-hours are required.

As a solution to these drawbacks, JP-A-62-288222
Japanese Patent Laid-Open Publication discloses a suspended earth and sand carrying-out device. This device is suitable not only for underwater but also for land excavation.
The present invention is intended for only underwater sediments, and has developed a more suitable device in terms of improving work efficiency at the time of scooping and mitigating overload when the link chain is buried in sediment such as sand. is there.

[Problems to be solved by the device]

The present invention has been made to further improve the conventional technique, and it is possible to efficiently and effectively scoop sediments or sediment scales on the bottom of the water, and also to overload sediments that cause abnormal deposition. It is an object to provide a scraping device that does not occur.

[Means for Solving the Problems]

The present invention is a floating wheel type suspension type lifting device characterized by the following technical means.

In other words, suspend an endless link chain with a bucket for lifting, and suspend it inside the endless link chain at the lower end of this endless link chain.
It has a structure in which floating rollers that are freely movable are suspended.

This idle wheel is equipped with a flat tire for winding the endless link chain, and a flange is provided on the flat tire so as to prevent the endless link chain from being disengaged from the cylindrical wheel.
It is designed to form the lower wheel of a suspended endless link chain.

Further, in the scraping device of the present invention, it is preferable that a driving sprocket wheel and a driven sprocket wheel are arranged side by side at an upper end portion, and an endless link chain is wound around them. As a result, it is possible to secure an appropriate space for unloading the bucket, and to widen the interval between the lifting chains to be suspended, thereby eliminating the risk of mutual interference between the lifting chains.

Further, as the endless link chain, it is preferable to use a chain having a stopper that restricts bending at an intersection angle of 5 ° inside and 35 ° outside the winding between adjacent links.

[Action]

The scooping device of the present invention has an endless link chain equipped with a bucket and a free-running rolling wheel at the lower end thereof, like a lower sprocket wheel. The weight of the floating roller can be adjusted according to the type of the object to be lifted, the amount of lift, the shape of the pit, and the like. In steady-state operation, the endless link chain, due to the weight effect of the idler wheels themselves, scoops as if it had a fixed lower chain wheel. That is, when the endless link chain is driven, the idle wheel rotates at that position, and the lift bucket attached to the endless link chain efficiently lifts sedimentation objects such as sand in the pit or scales. .

Next, the operation will be described when there are a large number of objects to be raked or when the idle wheel is buried while the objects to be raked are accumulated. In this case, the ascending endless link chain is pulled up by the rotation of the drive sprocket wheel. On the other hand, the endless link chain on the descending side that has passed the driven sprocket wheel cannot rotate around the idler rolling wheel due to the resistance of the object to be lifted, and is stagnant. As a result, the idler wheel is pulled up by the lifting endless link chain and comes out of the buried state. After that, the idle wheels roll,
The lower end of the catenary curve formed by the lifting endless link chain retracts to a position continuous with the descending endless link chain. The endless link chain restarts the scooping operation from that position, and the scooping work is sequentially carried out from the upper surface of the deposit due to the weight effect of the idle wheel, and the scooping work is continued to the steady position at the end.

By installing a driven sprocket wheel in parallel with the drive sprocket wheel at the top of this device, the bucket space between the drive sprocket wheel and the driven sprocket wheel can be set appropriately for the chute installation space. Can be secured. In addition, the space between the ascending / descending chains is secured, and when the floating rolling wheels are buried in the deposit, when the floating rolling wheels are pulled up, the rolling of the floating rolling wheels is facilitated. Further, if the positions of the driven sprocket wheels can be moved, it becomes easy to adjust the extension of the endless link chain and the positions of the idle wheels.

Next, as the chain used in the present invention, an endless link chain is wound between adjacent links by 5 ° on the outer side of the winding.
If a stopper with a bending limit at the inner angle of 35 ° is used on the inside, the lifting chain will not interfere when the link chain is tilted, and the link chain on the descending side will not reach the deposit. It is not folded and forms a smooth guideway when the above-mentioned idle wheel is retracted to facilitate movement.

〔Example〕

FIG. 1 shows an overall side view of an embodiment of the present invention. A drive sprocket wheel 1 is provided on the upper part, and a driven sprocket wheel 2 is juxtaposed to the drive sprocket wheel 1, and an endless link chain 4 is wound around and suspended from them. The idle wheel 3 is suspended at the lower end of the endless link chain 4 like a lower sprocket wheel. A bucket 5 is attached to the endless link chain 4. Drive motor 6 is drive chain 7
The endless link chain 4 is driven by rotating the drive sprocket wheel via the. The bucket 5 discharges the object to be lifted 10 onto the chute 9.

FIG. 2 is a partially sectional front view of the idler wheel of the embodiment. The idle rolling wheel 3 is a free rolling wheel and is a flat tire 11 around which the endless link chain 4 is wound.
It is a cylindrical wheel with both ends. This flat tire 11 is provided with a flange 12 so that the endless link chain 4 will not come off. Further, the flat tires 11 at both ends are joined by a boss 13. The boss 13 is dimensioned so as not to interfere with the bucket 5. Example boss
A hollow cylinder 13 is provided with a lid 14 having an opening and closing the opening. In order to adjust the weight, the hollow portion of the boss 13 is filled with sand or scale, and the weight of the idler wheels is changed according to the object to be raked, and the bucket bites into the object to be raked at the optimum rake efficiency, It can be adjusted to work.

Next, the operation of the embodiment will be described.

As shown in FIG. 1, the embodiment apparatus operates as follows in a steady state. Since the idle rolling wheel 3 is suspended below the endless link chain 4 wound around the upper drive sprocket wheel 1 and the driven sprocket wheel 2, the idle rolling wheel 3 is suspended due to the weight effect of the idle rolling wheel 3 itself. Forming the lower fixed chain wheel of. By rotating the scraping bucket 5 attached to the endless link chain 4, the bucket scrapes the scraping object 10 and discharges it to the chute 9.

FIG. 3 to FIG. 5 are explanatory views showing the process operation from the escape to the lifted state when the idle wheel of the embodiment of the present invention is buried.

In FIG. 3, when the floating wheel 3 is buried in the object 10 to be raked, the endless link chain 4 rotated by the drive sprocket wheel 1 resists the object 10 to be raked, so that the bucket 5 is scratched. Unable to dive into the object to be lifted, the descending link chain swells to the lower rear of the driven sprocket wheel. As a result, the idle wheel 3
Is pulled up around the ascending side link chain and escapes from the buried state.

In FIG. 4, the idle wheel 3 that has escaped onto the object to be lifted 10
Is still rolled by the ascending side link chain and moves to the descending link chain side.

In FIG. 5, the idle rolling wheel 3 rolled to the descending chain side.
As a result, the slack of the endless link chain 4 is eliminated, and the object 10 to be lifted is lifted from that position by the rotation of the lifting bucket 5 attached to the endless link chain 4. As the skimming is repeated, the idle wheel 3 moves to the ascending link chain side due to its own weight effect, and returns to the state of FIG.

[Effect of device]

ADVANTAGE OF THE INVENTION According to this invention, a fixed sprocket wheel is not provided in the lower part of an endless link chain, but the object to be raked can be efficiently raked, and a floating wheel is included in a large number of objects to be raked. Even if it is buried, it does not stop the driving of the endless link chain due to overload, and has an excellent effect that a smooth scraping operation can be performed.

[Brief description of drawings]

FIG. 1 is an overall side view of an embodiment of the present invention, FIG. 2 is a partial cross-sectional front view of an embodiment of an idle wheel, and FIGS. 3 to 5 are when the idle wheel of the embodiment of the present invention is buried. It is explanatory drawing which shows the operation | movement in the process which progresses from escape | deviation to a normal work picking state. 1 ...... Drive sprocket wheel 2 ...... Driven sprocket wheel 3 ...... Floating wheel 4 ...... Endless link chain 5 ...... Bucket, 6 ...... Drive motor 7 ...... Drive chain, 9 ...... Shoot 10 ...... Object to be lifted, 11 …… Flat tire 12 …… Flange, 13 …… Boss 14 …… Lid

Claims (4)

[Scope of utility model registration request] 1. An idle rolling wheel, characterized in that an endless link chain provided with a raking bucket is suspended and suspended, and a floating rolling wheel is suspended inside a lower end portion of the endless link chain. Equipped rake device. 2. The lifting device according to claim 1, wherein the idle wheel is a cylindrical wheel having flanged flat tires around which the endless link chain is wound. . 3. A drive sprocket wheel and a driven sprocket wheel are arranged side by side at an upper end of the wheel, and endless link chains are wound around the both wheels. A scraping device equipped with idle wheels. 4. The idle wheel according to claim 1, wherein the endless link chain has a stopper for limiting bending at an intersection angle of 5 ° and 35 ° inward on the outside of the winding between adjacent links. Rake device equipped with.