JPH11199025A - Belt conveyer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust the elastic elongation, bending elongation and permanent elongation of a belt automatically in a limited space by providing a weight type take up device on one side of the belt and a screw type take up device on the other side. SOLUTION: A vertical belt conveyer 1 in a ship C is composed of a long main conveyer 2 extending to a horizontal direction and a sub-belt conveyer 3 extending to a vertical direction. A weight type take up device A for absorbing the elongation of an endless belt 11 is provided on a driven pulley 15 arranged on the outside of the vertical part of the main belt conveyer 2 and a screw type take up device B for absorbing the elongation of the endless belt 11 is provided on a table pulley 14 wound the circulating endless belt 11. The elongation is absorbed by the lowering of a weight frame of the weight type take up device A for the elastic elongation and bending elongation of the belt 1 and the permanent elongation of the endless belt 11 is absorbed by moving a bearing for taking up by the take up screw rod of the screw type take up device B for the permanent elongation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt conveyor for conveying goods, and a method for conveying relatively heavy objects such as coal, slag, ore and lime in a limited space such as a ship. For suitable belt conveyors.

[0002]

2. Description of the Related Art In general, when a relatively heavy material such as coal, slag, ore, lime or the like conveyed by a belt conveyor is conveyed, elastic or flexural elongation of the belt occurs. The driving pulley is likely to slip due to the slack of the belt. In addition, if the belt has been used for a certain period of time, permanent elongation of the belt will not be restored.

Therefore, conventionally, either a weight-type tensioning device in which a weight is attached to a tail pulley of a belt conveyor or a screw-type tensioning device in which a take-up screw rod is attached is provided to eliminate the elongation of these belts.

[0004]

However, when a screw-type tensioning device is provided, the permanent elongation of the belt is improved to some extent. However, the screw-type tensioning device originally has a small take-up (tension) allowance. It is difficult to sufficiently eliminate elastic elongation and flexural elongation of the belt. In particular, in a belt conveyor arranged in a limited space such as a ship, a take-up (tension) allowance cannot be obtained in a limited space in the ship, which is remarkable in a long belt conveyor.

[0005] Therefore, the belt is cut down or re-vulcanized to reduce the elastic elongation, flexural elongation, and permanent elongation of the belt, which is extremely complicated and time-consuming.

The present invention has been made in view of the above, and is a belt for automatically adjusting the elastic elongation, flexural elongation, and permanent elongation of a belt within a limited space, and for preventing a slip of a driving pulley. It is intended to provide a conveyor.

[0007]

According to the present invention, there is provided a belt conveyor comprising an endless belt provided with a weight type tensioning device and a screw type tensioning device.

According to this structure, since the weight tension device is provided on one of the belts and the screw tension device is provided on the other,
The extension of the belt is absorbed by the extension absorbing action of the weight-type tensioning device, whereby the elastic extension and the flexing extension are eliminated, and the slip of the drive pulley due to the slack of the belt can be prevented.

[0009] The permanent elongation of the belt is absorbed by the elongation absorbing action of the screw type tensioning device, and the elongation of the belt in the limited space is lost.

Therefore, it is not necessary to cut or re-vulcanize the belt in order to eliminate the elongation of the belt.

In the case where the weight type tensioning device has a structure in which a weight is provided in the weight frame and the weight frame slides up and down with the guide rod as a guide, if the belt is stretched, , The weight slides up and down with the guide rod as a guide,
The elastic elongation and bending elongation of the belt are reliably reduced.

Further, when the screw-type tensioning device has a structure in which a take-up screw is provided via a hydraulic jack, when the belt is stretched, the elastic jack of the belt is elastically bent or bent by the hydraulic jack. Elongation is absorbed, and the take-up adjustment of the take-up screw rod absorbs the permanent elongation of the belt, even in a limited narrow space,
The elastic elongation, flexural elongation and permanent elongation of the belt can be adjusted.

[0013]

1 to 3 show an embodiment of the present invention for a vertical belt conveyor. FIG. 1 is a side view of the entire vertical belt conveyor, and FIG. FIG. 3 is an enlarged side view of the screw type tensioning device.

A vertical belt conveyor 1 according to an embodiment of the present invention is, for example, an elongated main belt conveyor 2 provided in a ship C and extending in the horizontal and vertical directions, and attached to a vertical portion of the main belt conveyor 2. And a sub-belt conveyor 3 extending in the vertical direction.

The main belt conveyor 2 has a long endless belt 11 wrapped around a drive pulley 12, a head pulley 13 and a tail pulley 14 and circulates in the direction of the arrow in the figure.
Is wrapped around the head pulley 23 and the tail pulley 24 and circulates in the direction of the arrow shown in FIG.
The bulk material placed on the horizontal portion is transported to the vertical portion, sandwiched between the main belt conveyor 2 and the sub-belt conveyor 3, and transported upward.
It is discharged into the chute 4 from the three portions.

The driven pulley 15 arranged outside the vertical portion of the main belt conveyor 2 is provided with a weight type tensioning device A to which a weight for absorbing the extension of the endless belt 11 is attached. The tail pulley 14 around which the circulating endless belt 11 is wound is provided with a screw-type tensioning device B to which a take-up screw rod for absorbing the extension of the endless belt 11 is attached.

As shown in FIG. 2, the weight type tensioning device A includes a weight frame 5 on which weights 4a and 4b (not shown) connected to a driven pulley 15 are arranged. Is fitted so as to be able to slide up and down.

Therefore, when the belt 1 undergoes elastic stretching or bending stretching, the weight frame 5 of the weight type tensioning device A descends,
The elongation can be adjusted by absorbing the elongation. Further, it is possible to prevent the endless belt 11 from being slackened, thereby preventing the drive pulley 12 from slipping due to the slackness of the endless belt 11.

On the other hand, as shown in FIG. 3 (a), the screw type tensioning device B includes a support frame 71, a hydraulic jack 72 provided in the support frame 71, and a take-up bearing on the hydraulic jack 72. It is constituted by a take-up screw rod 74 which is attached via 73.

The hydraulic jack 72 is fixed to the support frame 71 via a jack mounting seat 75 by bolts or the like. The take-up bearing 73 includes upper and lower guide plates 76.
a, 76b to move in the front-back direction. The take-up screw rod 74 is attached to the support frame 71.
Nut M1 and lock nut M, which are fixed by bolts or the like through a threaded rod mounting seat 77
2 can be moved (slightly moved) in the front-rear direction by loosening. Note that, as shown in FIG. 3B, the front and rear positions of the jack mounting seat 75 and the screw rod mounting seat 77 can be changed by changing the positions of the bolts to be fixed.

Therefore, when the endless belt 11 is permanently stretched, the take-up bearing 73 is moved by the take-up screw rod 74 of the screw type tensioning device B, so that the permanent extension of the endless belt 11 can be absorbed. . Further, the permanent elongation of the endless belt 11 increases, and the take-up screw rod 7
In the case where the elongation cannot be absorbed by 4, the take-up bearing 73 is moved by the hydraulic jack 72, and the adjustment allowance for the take-up screw rod 74 is secured.
This makes it unnecessary to unnecessarily lengthen the take-up screw rod 74 and allows the screw-type take-up device to be installed in a limited space.

As described above, the weight-type tensioning device A and the screw-type tensioning device B are provided, and when the endless belt 1 is stretched even in a narrow space of the limited ship C by the action of the both, for example. It is possible to absorb the elongation and eliminate the elongation.

The weight type tensioning device A used in the above embodiment.
For example, a tensioning device may be adopted in which a tail pulley is placed on a truck and the tail pulley placed on the truck is pulled by a weight.

Further, the above embodiment employs a tensioning device provided with a hydraulic jack for absorbing elastic extension and bending extension and a take-up screw rod in the screw type tensioning device.
When there is room in the projecting space of the take-up screw rod 74, for example, as shown in FIG.

Although the above-described embodiment shows an example in which the present invention is applied to a ship, the present invention is not limited to a ship, but is also suitable for a land belt conveyor used in a limited space. Of course, it is also suitable for belt conveyors installed in places where there is sufficient space.

The material conveyed by the belt conveyor is not limited to bulk materials such as coal, slag, ore and lime, but is suitable for other materials.

In this embodiment, since the auxiliary belt conveyor 3 is relatively short, the driven pulley 25 is provided with the weight type tensioning device D. However, if necessary, a screw type tensioning device may be provided. .

[0028]

As described above, according to the present invention, the circulating belt is provided with the weight-type tensioning device and the screw-type tensioning device. Is absorbed, the elastic elongation and the bending elongation are eliminated, and the slip of the driving pulley due to the slack of the belt can be prevented.

Further, the permanent elongation of the belt is absorbed by the elongation absorbing action of the screw type tensioning device, so that the elongation disappears in a limited space.

Therefore, it is not necessary to cut or re-vulcanize the belt in order to eliminate the elongation of the belt.

Further, when the belt is stretched by the weight-type tensioning device, the weight slides up and down with the guide rod as a guide, so that the elastic extension and the bending extension of the belt can be surely reduced.

Further, when the belt is stretched by a screw-type tensioning device provided with a tail-up screw via a hydraulic jack, the hydraulic jack absorbs the elastic extension and the bending extension of the belt, and The permanent elongation of the belt is absorbed by the take-up adjustment of the up screw rod, so that the elastic elongation, flexural elongation and permanent elongation of the belt can be eliminated even in a limited narrow space.

[Brief description of the drawings]

FIG. 1 is an overall side view of an embodiment of a belt conveyor according to the present invention.

FIG. 2 is an enlarged side view of a portion of the weight type tensioning device of the belt conveyor of FIG. 1;

FIG. 3 is an enlarged partial side view of the screw type tensioning device of the belt conveyor of FIG. 1;

FIG. 4 is an enlarged side partial view of a portion in a different embodiment of the screw tensioning device.

[Explanation of symbols]

A weight type tensioning device, B screw type tensioning device, 1: belt, 4a, 4b weight, 5 weight frame, 6 guide rod,
11 endless belt, 12 head pulley, 14 tail pulley, 72 hydraulic jack, 74 take-up screw rod.

Claims (3)

[Claims] 1. A belt conveyor in which an endless belt is wound around at least a pair of pulleys, wherein the endless belt is provided with a weight-type tensioning device and a screw-type tensioning device. 2. The weight type tensioning device is characterized in that a weight is provided in a weight frame and the weight frame slides up and down with a guide rod as a guide. The belt conveyor according to 1. 3. The belt conveyor according to claim 1, wherein the screw-type tensioning device has a configuration in which a take-up screw bar is provided via a hydraulic jack.