JPH07228358A - Guide roller support for bucket chain - Google Patents

Abstract

PURPOSE:To reduce wearing, vibration, noise, etc., to improve durability and further to miniaturize an intermediate guide [art of a chain link and the column end part, in a device. CONSTITUTION:Since each guide roller of guide roller train of small diameter, set up along circular arc-shaped moving path (guide roller support) 8 to 11 of fixed radius of curvature, is brought into contact with one side of a bucket chain link, to change a direction of a chain 1 by rolling contact of each guide roller, an impact generated at the time of meshing relating to a sprocket is eliminated, to prevent generating vibration and noise. Since each guide roller in a guide roller train of small diameter is smoothly rotated, also wearing due to slipping between each guide roller and the chain link is eliminated, to resist against use for a long period. The guide supports 8 to 11 are small in size, and when used in an intermediate guide part and column lower part of the bucket chain 1, miniaturization thereof is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide roller support for a bucket chain used in a continuous excavating machine, an unloader or the like.

[0002]

2. Description of the Related Art FIGS. 4 and 5 show an example of a conventional guide roller support for a bucket chain. FIG. 4 is a side view showing a lower end portion of an unloader using a bucket chain, in which a bucket chain 01 is circulated and driven in a direction of an arrow A in a column 02 portion supported by an unloader main body (not shown) to be swingable. L-shaped lower frame 03 connected,
Around 04 is guided by sprockets 05-08 and a rail-shaped guide member 09, the direction is changed between the intermediate portion and the lower end portion, and the circular movement is performed.

FIG. 5 shows the details of the rail-shaped guide member 09, namely, the chain link 0 of the bucket chain.
The downward curved rail 09a contacting the guide roller 01b of the la frame 1a is connected to the lower frame 04 via the support frame 09b.
It is fixed on the top and the chain link 01a is curved rail 09
It is designed to slide along a. 01
Reference numeral 0 is a bucket attached to the bucket chain 01 at regular intervals.

[0004]

In the conventional guide roller support of the bucket chain shown in FIGS. 4 and 5,
It is impossible to reduce the number of teeth of the sprockets 05 and 08 due to the relationship of the meshing angle between the sprockets 05 and 08 for guiding the bucket chain 01 at the intermediate portion and the relationship of the collision between the sprocket and the bucket chain. Since the diameter becomes large, the lower part of the column 01 becomes large due to these sprockets 05 and 08, and it is inevitable that the device becomes large.

Even if the number of teeth is suppressed to a certain degree, it is possible to prevent noise from being generated due to load spillage from the bucket 010 due to shock and vibration caused by the engagement of the sprocket 05 and 08 and the bucket chain 01. Absent. Further, although the guide roller 01b comes into contact with the curved rail 09a of the rail-shaped guide member 09 by the rolling contact of the guide roller 01b, the guide roller 01b does not normally roll smoothly due to insufficient lubrication or the like, and the curved rail 09a and the guide roller 01b are There is a problem that the wear is caused early and the service life is shortened.

The present invention has been proposed in view of the above-mentioned problems, and its object is to reduce wear, vibration, noise, etc. of the device, improve durability, and provide an intermediate guide portion of a chain link or The point is to provide a guide roller support for a bucket chain that can downsize the lower end of the column.

[0007]

In order to achieve the above object, a guide roller support for a bucket chain according to the present invention has an arcuate movement path having a constant radius of curvature in a curved portion for changing the movement direction of the bucket chain. A small-diameter guide roller row which is provided along the curved portion and rolls in contact with one side of the chain link of the bucket chain is arranged along the arcuate movement path.

In the guide roller support of the bucket chain, the side edges of the chain links which come into contact with the guide rollers are formed along the arcuate movement path so that two or more guide rollers always contact each chain link. A guide roller may be provided.

[0009]

The guide roller support of the bucket chain of the present invention is configured as described above, and each guide roller of the small diameter guide roller row installed along the arcuate path having a constant radius of curvature is provided on one side of the chain link. Since the guide chains are brought into contact with each other and the direction of the bucket chain is changed by the rolling contact of each guide roller, the impact generated when the sprocket is bitten is eliminated, and vibration and noise are not generated.
Further, since each guide roller of the small-diameter guide roller row smoothly rotates, wear due to slippage between each guide roller and the chain link is eliminated, and long-term use is endured. Further, the guide support is small, and if the small guide support is used for the intermediate guide portion of the bucket chain and the lower portion of the column, the intermediate guide portion of the chain link and the lower end portion of the column can be downsized.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a guide roller support for a bucket chain according to the present invention will be described with reference to an embodiment shown in FIGS. FIG. 1 is a side view of a lower portion of an unloader to which the guide roller support is applied. Reference numeral 1 in FIG. 1 is a bucket chain provided so as to be circulated and driven downward in the column portion 2 of the unloader in the direction of arrow A. An L-shaped vertical frame and a bottom frame 4a and 5a swingably provided at the lower end of the vertical frame 4 and the bottom frame 5
The rocking cylinders 6 and 7 are a pair of lower end sprockets provided at the front and rear ends of the bottom frame 5.

Reference numeral 8 denotes a guide roller support fixed on the bottom frame 5, and the guide roller support 8 is installed at a position where the direction of the bucket chain 1 near the tip sprocket 6 is changed (hereinafter referred to as a bent portion). Reference numeral 9 denotes a guide roller support (arc-shaped moving path) provided on the descending side bent portion of the bucket chain 1, and the guide roller support 9 is fixed to the lower end of the column portion 2.

Reference numerals 10 and 11 denote guide roller supports (arc-shaped moving paths) provided on the upward bending portion of the bucket chain 1. The guide roller supports 10 and 11 are fixed to the lower end of the column portion 2. Of these guide roller supports 10 and 11, the guide roller support 11 is
The vertical frame 4 is provided at a position where it engages with one line of the rear side bucket chain when the vertical frame 4 is swung to the maximum rear side (right side).

FIG. 2 is an enlarged side view of the guide roller support 9 of FIG. 1, and FIG. 3 is a cross-sectional plan view taken along the line CC of FIG. The guide roller support 9 is fixed to the column portion 2 and a curved guide roller support frame 12 along a curve having a constant radius of curvature R designed in advance according to the size of the chain link 1a in the curved portion of the bucket chain 1. The fixed guide roller support frame 12 is fixedly supported by the support frame 13, and a large number of small diameter guide rollers 14 are axially attached to the fixed guide roller support frame 12 to form a row of small diameter guide rollers 14.

As shown in FIG. 3, each of the small diameter guide rollers 14 is preferably a flanged roller extending over the link 1a of the bucket chain 1, and more than two guides are provided on the side surface of one chain link 1a. The roller 14 is provided so that it is always in contact. 3 indicates a bucket position corresponding to the guide roller support 9, and 3'indicates a bucket position corresponding to the guide roller support 10.

The small-diameter guide rollers 14 and the guide roller support frame 12 are provided in the vertical frame 4 and the bottom frame 5.
The maximum bending angle is along an arc with a constant radius of curvature R so as to be able to cope with the fluctuation of the bending angle of the chain due to the swinging of the guide roller, and both ends of the guide roller support frame 12 may be linear portions as necessary. Further, of the chain link 1a of the bucket chain 1, preferably, the side edge on the side in contact with the guide roller supports 8 to 11 is formed along a curve having a constant radius of curvature R. The other guide roller supports 8 and 10 and 11 are also configured in the same manner in their respective required positions.

Further, in FIG. 1, a similar guide roller support may be formed also in the intermediate bending portion reaching the drive sprocket on the upper end side of the bucket chain 1 in the column portion 2.
The guide roller support 9 is a chain link of the bucket chain 1 that moves in a curved portion when the bucket chain 1 is cyclically moved in the direction of arrow A in FIG. 1 by a drive sprocket (not shown) to perform unloading work. 1
Each small diameter guide roller 14 rolls and contacts one side of a,
Since the bucket chain 1 is guided in the bending direction, the impact generated when the sprocket and the chain are engaged with each other is eliminated, and the vibration and noise of the bucket 3 are eliminated.

Further, since sliding friction unlike the rail guide does not occur, the resistance of the bucket chain 1 to the circulating movement is reduced, the wear due to the friction on both the guide side and the bucket chain 1 side is reduced, and the apparatus operates for a long period of time. Will endure. Also, the curved guide support frame 12 and the support frame 1
The entire shape of the guide roller support including 3 is much smaller than that of the conventional sprocket type, and particularly when the guide roller support is attached to the column portion 2 for use, the column portion 2 is downsized.

The guide roller 1 of the chain link 1a
4 is formed along a curved line with a constant radius of curvature R, and each chain link 1a always contacts two or more guide rollers 14, so that each guide roller 14 arranged in the curved portion of the guide roller support is Chain link 1a
The side edges of the bucket chain 1 are stably supported, and the bucket chain 1 is guided in the bending direction in a state where there is no runout, so that a more stable cargo handling operation is performed.

The shape of the guide roller 14 of the guide roller support, the method of assembling the curved guide support frame 12 and the support frame 13, and the like may be appropriately changed according to the shape of the machine body to be applied.

[0020]

As described above, in the guide roller support of the bucket chain of the present invention, each guide roller of the small diameter guide roller row installed along the arcuate movement path having the constant curvature radius contacts one side of the chain link. Since the direction of the bucket chain is changed by the rolling contact of each guide roller, the impact generated when the sprocket is bitten is eliminated, and wear, vibration, noise, etc. of the device can be reduced.

Further, since each guide roller of the small diameter guide roller row smoothly rotates, wear due to slippage between each guide roller and the chain link can be eliminated, and durability can be improved. Also, the above guide support is small,
If this small guide support is used for the intermediate guide portion of the bucket chain or the lower portion of the column, the intermediate guide portion of the chain link and the lower end portion of the column can be downsized.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment in which a guide roller support of a bucket chain according to the present invention is applied to a lower portion of a bucket chain of an unloader.

FIG. 2 is a side view showing an enlarged part B of FIG.

3 is a cross-sectional plan view taken along the line CC in FIG.

FIG. 4 is a side view showing a state in which a bending portion of a conventional bucket chain is applied to a lower portion of an unloader.

5 is a longitudinal rear view taken along the line DD of FIG.

[Explanation of symbols]

 1 Bucket chain 1a Chain link 2 Column part 3 Bucket 4 Vertical frame 5 Bottom frame 4a, 5a Swing cylinder 6 Bottom frame tip sprocket 7 Bottom frame rear end sprocket 8-11 Arc path (guide roller support) 12 Guide roller support Frame 13 Support frame 14 Guide roller R Constant radius of curvature of curved portion

Front page continuation (72) Inventor Nobuto Iwamoto 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture Mitsubishi Heavy Industries Ltd. Hiroshima Works

Claims (2)

[Claims] 1. A small-diameter guide roller that rolls in contact with one side of a chain link of a bucket chain, in which an arcuate movement path having a constant radius of curvature is provided along a curved portion in a curved portion for changing the moving direction of the bucket chain. A guide roller support for a bucket chain, wherein rows are arranged along the arcuate movement path. 2. A side edge portion of the chain link which comes into contact with a guide roller is formed along the arcuate movement path, and the guide rollers are arranged so that two or more guide rollers are always in contact with each chain link. The guide roller support for the bucket chain according to claim 1, which is provided.