JPS6154684B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a flange overlap change device at the lower corner of a pivoted bucket elevator transitioning from lowering to horizontal motion.

FIG. 1 shows an example of the use of a pivoted bucket elevator (hereinafter simply referred to as bucket elevator). As shown in FIGS. 2 and 3, the bucket elevator has a pair of parallel endless drive chains 1,
A bucket 3 is pivotably tilted at a constant pitch on a common roller shaft 2 of 1, and a low horizontal movement section L is mounted.
At this point, the objects S to be transferred placed in the bucket 3 are pulled up to a high place, the bucket 3 is overturned in the horizontal movement section H at the high place, and the objects S to be transferred are discharged to the hoppers 4, 5, etc.

In this case, flanges 6 and 7 are provided at the front and rear of the bucket 3 so that the objects to be transported can be continuously loaded, and the flanges 6 and 7 of adjacent buckets 3 are overlapped with each other. However, when the bucket 3 goes up around the sprocket, for example at the positions of the sprockets 8, 9, and 10 in FIG. 1, the rear flange 7 of the leading bucket 3 overlaps the front flange 6 of the trailing bucket 3. Yes, but Bucket 3
When the sprockets descend around the sprockets, for example, at sprockets 11, 12, and 13, a flange overlap state opposite to that described above appears. Therefore, when the bucket rotates around two sprockets and goes down, moves horizontally, and goes up, or goes up, moves horizontally, and goes down, it is necessary to change the flange overlap state. In the latter case, the flange overlap can be changed by using the action of overturning the bucket 3 to discharge the transferred material at the hopper 5, but in the former case, a separate flange overlap changing device is required. .

It is an object of the present invention to provide a device for changing the flange overlap at the lower corner of a pivoted bucket elevator, which is capable of changing the flange overlap.

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

In order to stably overturn the bucket at the place where the transferred materials are discharged, the bucket is equipped with a 1-piece at the lower part of both outer end surfaces of the bucket at a position equidistant from the vertical center plane perpendicular to the transfer direction of the bucket.
The guide rollers 14 and 15 are pivotally supported.

The invention utilizes guide rollers 14, 15 to cause flanges 6, 7 to overlap at the location of sprocket 13, as opposed to the overlap that would naturally occur when the invention was not practiced. In FIG. 5, it is assumed that the guide rollers 14 and 15 are located on the back side and the front side of the bucket bag 3, respectively. The bucket elevator is entirely surrounded by an outer casing 16, and the rotating shaft 17 of the sprocket 13 is connected to the outer casing 1.
It is supported by a bearing 18 attached to 6. Of the guide rollers 14 and 15 of the descending bucket cart 3, a circular cam 19 circumscribed by the guide roller 15 is fixed to the inner surface of the sprocket 13a on the same side as the guide roller 15 near the rotating shaft 17, and a circular cam 19 circumscribed by the guide roller 15 is fixed to the inner surface of the sprocket 13a on the same side as the guide roller 15 near the rotating shaft 17. In this case, a guide rail 21 in which a guide roller 14 is inscribed is fixed to a support 20 fixed to an outer casing 16.

As the bucket 3 descends, the guide roller 15
is circumscribed by the circular cam 19 to tilt the bucket 3 about the roller shaft 2 toward the sprocket 13a. This tilting angle increases until the guide roller 15 is at the same height as the sprocket rotating shaft 17. As shown in FIG. 6, the guide rail 21 has an arcuate surface 22 substantially concentric with the sprocket 13 and an inclined surface 22a above the arcuate surface 22, and is provided in an angular range of about 90 degrees where the bucket belt 3 moves from lowering to horizontal movement. The upper end of the guide rail 21 is approximately at the same height as the rotating shaft 17, and the arcuate surface 22 extends linearly downward in the tangential direction from around a horizontal angle of approximately 60 degrees.

When the guide roller 15 is at the same height as the sprocket rotating shaft 17, the guide roller 14 is almost close to the upper end of the guide rail 21, and as the bucket belt 3 descends, the guide roller 14 is moved inside the arcuate surface 22 by the inclined surface 22a. The Bucket 3 is guided to touch and further tilts, and the tilting angle of the Bucket 3 reaches a maximum value of approximately 90 degrees around a horizontal angle of 45 degrees, after which the Bucket 3 returns to the horizontal position. When the bucket belt 3 shifts from the maximum value to horizontal movement with a tilting angle of zero, the front flange 6 of the trailing bucket 3 approaches the rear flange 7 of the leading bucket 3 from below, and the bucket belt 3 shifts to horizontal motion. When the flanges are in the desired overlapping state, they can move up smoothly along the sprocket 8 thereafter.

In the above embodiment, since the circular cam 19 fixed to the sprocket 13a was used, the circular cam 19
However, in order to tilt the bucket 3 in contact with the guide roller 15 as described above, a non-circular fixed cam may be used, in which case a non-circular fixed cam may be used. Just install a fixed cam.

The present invention has the above-mentioned configuration, and the operation of tilting the bucket to a desired tilting angle and returning it to a horizontal position is performed by a pair of guide rollers, a cam that engages with one of the guide rollers, and a guide rail that engages with the other. Since the guide rollers are shared, the guide rollers are small and lightweight, the bucket is well balanced, and the tilting operation can be performed smoothly. Additionally, since the circular cam is attached to the sprocket, the cam support structure is simple and easy to manufacture.

[Brief explanation of the drawing]

Fig. 1 is an elevational view of a pivoted bucket cart elevator to which the present invention is applied, Fig. 2 is a partial plan view showing the bucket cart support structure, Fig. 3 is a partial elevational view of the same, and Fig. 4 is the same as that shown in Fig. 1. 5 is a sectional view taken along line B-B in FIG. 4, and FIG. 6 is a side view taken along line A-A in FIG.
It is a sectional view taken along line C. 1... Drive chain, 3... Bucket, 6,7
... Flange, 13a, 13b ... Sprocket, 14, 15 ... Guide roller, 17 ... Sprocket rotating shaft, 19 ... Circular cam, 21 ... Guide rail.

Claims (1)

[Claims] 1 Flange overlap of a pivoted bucket elevator in which flanges that overlap each other in a horizontal movement section are provided at the front and rear of a large number of bucket trucks whose end surfaces are rotatably supported at a constant pitch on a pair of parallel drive chains. This is a changing device, which has a pair of sprockets installed at the lower corner where the drive chain moves from lowering to horizontal movement, with one guide roller supported horizontally on both end faces of each bucket. One of the sprockets is provided with a circular cam that is circumscribed by one guide roller near the sprocket rotation axis and tilts the bucket toward the sprocket as it moves, and the other guide roller is inscribed in the fixed member. A flange overlap changing device at a lower corner of a pivoted bucket cart elevator, characterized in that a guide rail is fixed for returning the bucket cart to a horizontal position after further tilting the bucket cart following the above-mentioned tilting movement.