JPS6132896Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a conveyance chain equipped with a dustproof ring that prevents dust from entering the sliding portion of the traveling rollers.

Many apron conveyors for conveying powder and granular materials and conveyors for conveying hot steel pieces are used in adverse environments where dust from the conveyed material is scattered or scales fall.

In chains used in such adverse environments, dust enters the sliding parts through the gaps between the running rollers, reducing the effectiveness of the lubricating oil and accelerating wear. This causes malrotation of the chain, causing polygonal uneven wear on the outer diameter, which significantly shortens the life of the chain.
It also had serious drawbacks such as increased power loss due to increased running resistance.

Conventionally, as a countermeasure for this, the Jiko Kosho 55 shown in Figure 5 was used.
A method disclosed in Japanese Patent No. 52114 has been attempted in which a stepped portion is formed at the end of a bearing metal (bushing) and a dustproof ring is fitted into the end surface of the stepped portion.

However, this method is expensive, lacks versatility, and does not have a dust-proofing function for the gap between the end face of the running roller and the link plate, so it still has the disadvantage that dust adheres to the gap and causes rotation failure. However, the shortcomings could not be completely resolved.

The present invention was devised in view of this situation, and includes forming a dust-proof ring loose-fitting part at the end of the running roller, and adding a width to the loose-fitting part of the dust-proof ring approximately equal to the depth of the loose-fitting part of the dust-proof ring. A dustproof ring with the same inner diameter smaller than the width of the link plate and the outer diameter of the washer is fitted loosely, making it inexpensive and versatile, and reducing the gap between the end face of the running roller and the link plate and washer. The aim is to obtain a chain that also has a dustproof function.

Embodiments of the present invention will be explained based on the drawings. FIGS. 1 and 2 show the first embodiment, in which 1 is a conveyance chain with a pair of left and right pin link plates 2 and a pair of right and left bushes. The bush link plates 3, 3 are arranged alternately, and holes are provided at both ends of the bush link plates 3, 3 (one end is not shown).
A bushing 4 is press-fitted and fixed to the bushing 4, and a running roller 5 is loosely fitted to the outer periphery of the bushing 4.

Then, by inserting and connecting the pin 6 into the bush 4 and the pin link plates 2, 2 on both sides, an annular stepped portion 7, 7 is formed at the end of the running roller 5, and an annular stepped portion 7, 7 is formed in the annular stepped portion 7, 7. Dust-proof rings 8, 8, which have approximately the same width as the depth H of the step portions 7, 7 and whose inner diameter is smaller than the width W of the bushing link plates 3, 3, are loosely fitted.

FIG. 3 shows a second embodiment, in which annular grooves 9, 9 are formed at the ends of the running roller 5', and the annular grooves 9, 9 have a width that is approximately the same as the depth H of the annular grooves 9, 9. , dustproof rings 8', 8' having inner diameters smaller than the widths of the bushing link plates 3', 3' are loosely fitted.

FIG. 4 shows a third embodiment, in which the present invention is applied to a chain having running rollers on both outer sides of the chain, in which the pin 10 is extended to both outer sides of the chain, and the pin 10 is run on the extended part. Loosely fit the rollers 11, 11,
Washers 12, 12 are fitted on the outside thereof, and retaining pins 13, 13 are used to prevent them from coming off. Further, annular grooves 14, 14 are formed at the inner ends of the running rollers 11, 11, and the annular grooves 14, 14 have approximately the same width as the depth H of the annular grooves 14, 14, and have an inner diameter of a pin link plate 15. , 15 are loosely fitted.

Further, annular step portions 14', 14' are formed at the outer ends of the running rollers 11, 11, and the annular step portion 1
4', 14' have a depth H of the annular step portions 14', 14'.
Dust-proof rings 16', 16' having approximately the same width and having an inner diameter smaller than the outer diameter of the washers 12, 12 are loosely fitted.

As the chain runs, the dustproof ring moves freely between the gap A formed between the link plate or washer and the bottom surface of the dustproof ring loose fitting part of the running roller. , most of which are located in the center of gap A.

When the dustproof ring is located at the center of the gap A, the gap B between the link plate or washer and the dustproof ring becomes half of the gap C between the link plate or washer and the end surface of the running roller, and the gap becomes smaller. This prevents dust from entering the sliding part through the gap and extremely reduces the amount of dust entering.

Furthermore, since the gap D between the dustproof ring and the bottom surface of the dustproof ring loose fitting part of the traveling roller has a labyrinth effect, the intrusion of dust through the gap D is also extremely reduced.

It is also possible to prevent the lubricating oil supplied to the sliding parts from leaking to the outside, and to lengthen the oiling interval.

Also, when thrust force is applied to the running roller,
Since the depth of the loosely fitting part of the dustproof ring on the running roller and the width of the dustproof ring are approximately the same, the dustproof ring is stored in the loosely fitting part of the dustproof ring on the running roller, and is aligned with the end face of the running roller, and is attached to the link plate or washer surface. Press and slide.

Therefore, the thrust force is between the end face of the running roller and
The dust will be absorbed by the end face of the dustproof ring, so if the end face of the running roller is wear resistant, the dustproof ring does not need to be wear resistant, and soft materials such as mild steel, rubber, and resin can also be used. be.

Since the present invention has the above-mentioned working structure, there is no need to form a stepped portion on the bushing, and it can also be applied to a chain without a bushing, so it is inexpensive and versatile.

It also prevents dust from entering the sliding part between the link plate or washer and the end face of the running roller, so there is no increase in running resistance or rotation failure, and the life of the chain is significantly increased. It has many effects.

In the above embodiment, the running roller of the chain was described, but it may also be used as a conveyance support roller such as an accumulation conveyor, or it may be used as a running roller with a built-in rolling bearing or a conveyance support roller. However, similar effects can be achieved.

If an annular step and an annular groove are provided on the same end face of one roller and a dustproof ring is used twice, the labyrinth effect is increased and a greater effect can be obtained.

[Brief explanation of the drawing]

Figure 1 is a side view showing the first embodiment of the present invention;
The figure is a cross-sectional view, FIG. 3 is a cross-sectional view showing the second embodiment, FIG. 4 is a cross-sectional view showing the third embodiment, and FIG.
The figure is a cross-sectional view showing a conventional technique. 5, 5', 11... Travel roller, 7, 14'...
Annular step part, 9, 14... Annular groove part, 8, 8', 1
6,16'...Dustproof ring.

Claims (1)

[Claims for Utility Model Registration] (1) In a chain having a running roller, a dust-proof ring loose fitting part is formed at the end of the running roller,
A dustproof ring whose width is approximately the same as the depth of the loosely fitted part of the dustproof ring and whose inner diameter is smaller than the width of the link plate and the outer diameter of the washer is loosely fitted into the loosely fitted part of the dustproof ring. Chain with dustproof ring. (2) The chain with a dustproof ring according to claim 1, wherein the dustproof ring loose fitting part is an annular stepped part. (3) The chain with a dustproof ring according to claim 1, wherein the dustproof ring loosely fitting part is an annular groove. (4) The chain with a dust-proof ring according to claim 1, wherein the dust-proof ring loose fitting part has an annular step part and an annular groove part.