JP2004292112A - Chain stretch adjusting device for slat conveyor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a slat conveyor capable of adjusting a chain pitch at any position by facilitating the change of the chain pitch by the rotation of a bearing cylinder with an eccentric part to an eccentric position. <P>SOLUTION: In this slat conveyor, a large number of links 20 are connected endlessly to each other, a guide roller 30 is fitted to the lower end of each connection pin 21, and a slat for putting a load thereon is installed at the top of the links 20. The bearing tube 26 with the eccentric part 25 is fitted into bearing holes 23 and 24 formed at the front and rear of each link and a connection pin 21 is inserted into the bearing tube. A handle 36 capable of changing the link pitch by rotating the eccentric part is installed at the upper end of each bearing tube. Also, a groove 35 is formed in the shoulder part of the bearing cylinder 26, and a projection 34a engaged with the groove 35 and locking the rotation of the bearing tube 26 after pitch adjustment is formed at the upper edge of the bearing hole in the link. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a device for adjusting the elongation of a slat conveyor chain by changing the pitch at any position of the slat conveyor chain capable of forming a curved or straight conveying path.
[0002]
[Prior art]
A slat conveyor that travels on a conveyor path that includes a curved road causes the chain to grow due to wear of the connecting shaft due to long-term use, causing looseness in the link, etc., and smooth running on the curved part of the conveyor. Lack of characteristics, causing vibration and noise. For this reason, a measure has been taken to absorb the elongation of the chain by moving a track system such as a frame and a running rail in accordance with the elongation of the chain. This method of moving the track system usually moves the curved portion of the conveyor frame and fills the gap created by the movement with a new member to adjust the gap, which requires not only a large amount of work but also a lot of labor and time. In order to replace a worn shaft, the chain or link plate had to be disassembled and reassembled. In addition, the lower part formed on the front side of the chain link is superimposed on the upper part formed on the rear side of the link, and a number of links are connected by inserting connection pins into the overlapping parts, and a guide roller is provided at the lower end of each connection pin. When mounting, the eccentric head is integrally formed on the upper part of the connecting pin, the eccentric head is fitted in the pin hole of the chain link, and the connecting pin is rotated by a predetermined angle to rotate the eccentric head with respect to the pin axis. There is known an arrangement in which a chain pitch is changed by changing a position to adjust a chain elongation (for example, Patent Document 1).
[0003]
Patent Document 1: Japanese Utility Model Registration No. 2574039 (page 3, right column, lines 7 to 27, FIGS. 1 and 2).
[0004]
[Problems to be solved by the invention]
However, the connecting pin as described above is expensive because the eccentric head is integrally formed on the upper part of the pin, and has a problem in strength such that the connecting pin may be broken at the position of the eccentric head during running.
The present invention provides a handle at the upper end of a bearing cylinder having an eccentric part to facilitate the change of the chain pitch by turning the bearing cylinder to the eccentric position, without moving the frame unlike the conventional type. It is another object of the present invention to provide a slat conveyor capable of easily adjusting the tension of the chain without greatly changing the distance between the slat support members.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a slat conveyor in which a number of links are connected endlessly, a guide roller is provided at the lower end of each connecting pin, and a slat for mounting a load is mounted on the top of the link. A bearing cylinder having an eccentric portion is fitted in bearing holes provided before and after the connector cylinder, and a connecting pin is inserted into the bearing cylinder, and the eccentric portion is rotated at the upper end of the bearing cylinder to change a link pitch. A handle is provided. Further, a groove is formed in a shoulder portion of the bearing cylinder, and a projection is provided on an upper edge of the bearing hole of the link to engage with the groove and prevent the bearing cylinder from rotating.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a perspective view of a slat conveyor according to an embodiment of the present invention.
The slat conveyor 10 has a support plate 13 with a rubber slat 14 attached to the upper surface of each link constituting the block chain 16, and a front surface of the upstream slat sequentially overlaps a rear portion of the downstream slat to form a transfer surface. The vehicle is driven in the direction of arrow 40. A drive unit 12 is installed at a predetermined position on the traveling path, and a guide rail 15 is provided at a longitudinal center of the frame 11 to guide a guide roller 30 (FIG. 2) attached to a lower end of a connecting pin of each link. A running wheel 18 is attached to the lower surface of each slat wing and is brought into contact with the left and right guide rails 15.
[0007]
FIG. 2 is a partially longitudinal front view of a link block.
A bearing tube 26 having an eccentric portion 28 is fitted into bearing holes 23 and 25 provided before and after each link 20, and a connecting pin 21 is inserted into the bearing tube. Is provided, a handle 36 capable of changing the link pitch by rotating the. A groove 35 is formed in the shoulder 33 of the bearing cylinder 26, and a projection 34a is provided on the upper edge of the bearing hole 23, 24 of the link 20 to engage with the groove 35 to prevent the bearing cylinder from rotating.
[0008]
FIG. 5 is an exploded perspective view of the chain assembly. 6 (a) is a front view, FIG. 6 (b) is a side view, FIG. 6 (c) is a plan view, FIG. 6 (d) is a cross-sectional view taken along line AA of the front view, and FIG. It is sectional drawing in the BB line of a front view.
In the figure, 19 is a bolt embedded in a link for attaching a slat, 22 is a first portion of the link (yoke shape), 24 is a second portion of the link (convex shape), and 27 is a bush disposed at the lower part of the bushing. , 29 are chamfered portions of the bearing barrel 27, 31 is an R-clip for retaining, 32 is a pin hole formed on the connecting pin, 34 is a connecting pin through hole formed in the bearing barrel 26, and 37 is a protrusion of the handle. Reference numeral 38 denotes a nut at the top of the connecting pin, and 39 denotes a retaining ring.
[0009]
As described above, this device sequentially inserts the second portion (convex shape) 24 of the link into the first portion (yoke shape) 13 of the relatively thick block-shaped link 20, and A large number of links 20 are connected endlessly by penetrating the connecting pins 21. When the links 20 and connecting parts need to be replaced or repaired, the nut 38 at the top of the connecting pins 21 is removed and the R- After the clip 31 is removed from the pin hole 32 and the bush 27 and the connecting pin 21 are pulled down, the bearing tube 26 is pulled up with the handle 36 and pulled out from the bearing holes 23 and 25 to be disassembled. . The nut 38 at the top of the connecting pin prevents the connecting pin 21 from dropping unexpectedly when the R-clip 31 is broken or dropped during traveling, or when the R-clip 31 is removed during disassembly. In preparation for.
[0010]
FIG. 3 is a cross-sectional view of a state where the eccentric sleeve of the link block is pulled up, and FIG. 4 is a cross-sectional view of a state where the eccentric sleeve is set by rotating the eccentric sleeve by 180 ° in the state of FIG.
When the chain is stretched by the slat conveyor conveyance operation, the handle is lifted up by holding the handle (FIG. 3), and the eccentric position is rotated by 180 ° while disengaging the groove 35 from the projection 34a. After the change, the bearing cylinder 26 is pushed into the shaft hole 25 and fitted (FIG. 4). By doing so, the chain pitch P at an arbitrary position can be changed. Assuming that the eccentric distance of each eccentric portion is, for example, 2.5 mm, when shortening the chain length by 10 mm, adjust the chain elongation by rotating the bearing tube 26 of the four links at an arbitrary position by 180 ° and reassembling. be able to.
[0011]
【The invention's effect】
As described above, according to the present invention, a bearing cylinder having an eccentric portion is fitted into bearing holes provided before and after each link, and a connecting pin is inserted into the bearing cylinder, and an eccentric portion is provided at an upper end of each bearing cylinder. Since the handle which can be rotated to change the link pitch is provided, the bearing cylinder can be rotated by a predetermined angle to adjust the chain pitch at an arbitrary position. In addition, by engaging the projection on the upper edge of the bearing hole with the groove formed in the shoulder of the bearing cylinder, the bearing cylinder can be prevented from rotating and the state of pitch adjustment can be maintained.
[Brief description of the drawings]
FIG. 1 is a perspective view of a slat conveyor provided with a chain elongation adjusting device of the present invention.
FIG. 2 is a partial vertical front view of a link block in FIG. 1;
FIG. 3 is a sectional view showing a state where an eccentric sleeve of a link block is pulled up.
FIG. 4 is a cross-sectional view of a state in which the eccentric sleeve is set by being rotated by 180 ° in the state of FIG. 3;
FIG. 5 is an exploded perspective view of a link chain.
6 (a) is a front view, FIG. 6 (b) is a side view, FIG. 6 (c) is a plan view, FIG. 6 (d) is a cross-sectional view taken along line AA of FIG. Is a sectional view taken along line BB in the front view.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Slat conveyor 11 Frame 12 Drive unit 13 Support plate 14 Rubber slat 15 Guide rail 16 Block chain 17 Travel rail 18 Travel wheel 19 Bolt 20 Link 21 Connecting pin 22 First part of link (yoke shape) 24 Second part of link (convex) form)
23, 25 Bearing hole 26 Bearing cylinder 27 Bush 28 Eccentric part 29 Chamfered part 30 Guide roller 31 R-clip 32 Clip insertion hole 33 Bearing cylinder shoulder 34 Connecting pin through hole 34a Projection 35 Shoulder groove 36 Handle 37 Handle Projection 38 Nut 39 Retaining ring 40 Running direction

Claims (2)

A large number of links are connected endlessly, and a guide roller is provided at the lower end of each connecting pin, while an eccentric portion is provided in a bearing hole provided before and after each link in a slat conveyor in which slats for loading luggage are mounted on top of the links. A slat conveyor provided with a handle capable of changing a link pitch by rotating an eccentric part at an upper end of the bearing cylinder by fitting a bearing cylinder having the coupling pin into the bearing cylinder. Chain elongation adjustment device. 2. A slat conveyor chain according to claim 1, wherein a groove is formed in a shoulder portion of the bearing cylinder, and a projection is provided on an upper edge of a bearing hole of the link to engage with the groove to prevent the bearing cylinder from rotating. Stretch adjusting device.

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