JP4350402B2 - Chain elongation adjustment device for slat conveyor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for adjusting the elongation of a chain by changing the pitch at an arbitrary position of a slat conveyor chain that can bend or form a straight conveyance path.
[0002]
[Prior art]
A slat conveyor that runs on a conveyance path that includes a curved run will cause the chain to elongate due to wear of the connecting shaft due to long-term use, etc., generating looseness in the link, etc. It lacks characteristics and causes vibration and noise. For this reason, it has coped by absorbing the elongation of the chain by moving the track system such as the frame and the running rail in accordance with the elongation of the chain. This movement method of the track system usually requires a lot of work and time because it moves the curve part of the conveyor frame and fills the gap created by the movement with new members to adjust. In order to replace a worn shaft, the chain and link plate had to be disassembled and reassembled. In addition, the lower step portion formed on the front side of the chain link is overlapped with the upper step portion formed on the rear side of the link, and connecting pins are inserted into the overlapping portions to connect a number of links, and a guide roller is provided at the lower end of each connecting pin. When attaching, an eccentric head is integrally formed on the upper part of the connecting pin, the eccentric head is fitted into the pin hole of the chain link, and the connecting pin is rotated by a predetermined angle to adjust the eccentric head with respect to the pin axis. There is known one in which the chain pitch is changed by changing the position to adjust the chain elongation (for example, Patent Document 1).
[0003]
[Patent Document 1]
Utility Model Registration No. 2574039 (page 3, right column, lines 7-27, FIGS. 1-2).
[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 portion of the pin, and there is a problem in strength such that the connecting pin may be broken at the position of the eccentric head during traveling.
In the present invention, a handle is provided at the upper end of the bearing cylinder having the eccentric portion so that the chain pitch can be easily changed by rotating the bearing cylinder to the eccentric position without moving the frame as in the conventional type. It is another object of the present invention to provide a slat conveyor that can easily adjust chain tension without greatly changing the interval between slat support members.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention relates to a slat conveyor in which a number of links are connected in an endless manner, a guide roller is provided at the lower end of each connection pin, and a slat for loading a load is attached to the top of the link. A bearing cylinder having an eccentric part is fitted in the bearing holes provided at the front and rear of the shaft, and a connecting pin is inserted into the bearing cylinder, and the eccentric part can be rotated at the upper end of the bearing cylinder to change the link pitch. A handle is provided. In addition, a groove is formed in the shoulder portion of the bearing cylinder, and a projection is provided on the upper edge of the bearing hole of the link to engage the groove and prevent the bearing cylinder from rotating.
[0006]
DETAILED DESCRIPTION OF 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 attached with rubber slats 14 attached to the upper surface of each link constituting the block chain 16, and the front part of the upstream slats sequentially overlaps the rear part of the downstream slats to form a conveying surface. And travels in the direction of arrow 40. A drive unit 12 is installed at a predetermined position on the travel path. A guide rail 15 is provided at the longitudinal center of the frame 11 to guide a guide roller 30 (FIG. 2) attached to the lower end of the link pin of each link. The traveling wheel 18 is attached to the lower surfaces of both slat blades and brought into contact with the left and right guide rails 15.
[0007]
FIG. 2 is a partially longitudinal front view of the link block.
A bearing cylinder 26 having an eccentric portion 28 is fitted into bearing holes 23 and 25 provided at the front and rear of each link 20, and a connecting pin 21 is inserted into the bearing cylinder. A handle 36 that can be rotated to change the link pitch is provided. Further, a groove 35 is formed in the shoulder portion 33 of the bearing cylinder 26, and a protrusion 34 a that engages with the groove 35 and prevents the bearing cylinder from rotating is provided on the upper edge of the bearing holes 23 and 24 of the link 20.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is to sequentially insert the convex portions of a plurality of links , each having a yoke portion on one side and a convex portion meshing with the yoke portion on the other side, into the yoke portions of adjacent links. In a slat conveyor that is connected endlessly using a connecting pin, and a guide roller is provided at the lower end of each connecting pin, while a slat for mounting a load on the link is attached,
Each link yoke part is provided with a connecting pin insertion bearing hole divided into upper and lower parts, and a bearing cylinder having an eccentric part is fitted into the upper bearing hole, and a bush is fitted into the lower bearing hole. ,
Connecting pins common to the bearing cylinder and the bush of each link are inserted, and the bearing cylinders of a plurality of links at arbitrary positions are respectively rotated 180 degrees at the upper end of the bearing cylinder. A chain elongation adjusting device for a slat conveyor, characterized in that a handle capable of changing a link pitch at an arbitrary position by changing a rotation position is provided.
According to a second aspect of the present invention, a groove is formed in the shoulder portion of the bearing cylinder, and a protrusion that engages with the groove and prevents the bearing cylinder from rotating is provided on the upper edge of the bearing hole of the link. It is a chain elongation adjusting device of a slat conveyor.
[0009]
As described above, this apparatus sequentially inserts the second portion (convex shape) 24 of the link into the first portion (yoke shape) 13 of the block-shaped link 20 having a relatively large thickness, and inserts it into each insertion portion. A large number of links 20 are connected endlessly by penetrating the connecting pin 21, but when the link 20 or the connecting part needs to be replaced or repaired, the nut 38 at the top of the connecting pin 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 downward, the bearing cylinder 26 is lifted upward by holding the handle 36 and can be disassembled by pulling it out from the bearing holes 23 and 25. . The nut 38 at the top of the connecting pin prevents the connecting pin 21 from unexpectedly dropping when the R-clip 31 is damaged or dropped during traveling or when the R-clip 31 is removed during disassembly work. It is a thing prepared for.
[0010]
FIG. 3 is a cross-sectional view of the link block with the eccentric sleeve pulled up, and FIG. 4 is a cross-sectional view of the state in which the eccentric sleeve is rotated 180 ° and set in the state of FIG.
When the chain is extended due to the transport operation of the slat conveyor, the bearing cylinder 26 is pulled up by holding the handle (FIG. 3), and is rotated 180 ° while disengaging the groove 35 and the protrusion 34a to set the eccentric position. 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. If the eccentric distance of each eccentric portion is 2.5 mm, for example, when the chain length is shortened by 10 mm, the chain extension is adjusted by rotating the bearing cylinders 26 of the four links at arbitrary positions 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 the bearing holes provided at the front and rear of each link, a connecting pin is inserted into the bearing cylinder, and an eccentric portion is provided at the upper end of each bearing cylinder. Since the handle that can be rotated to change the link pitch is provided, the chain pitch of an arbitrary position can be adjusted by rotating the bearing cylinder by a predetermined angle. Further, by engaging a protrusion on the upper edge of the bearing hole with a groove formed in the shoulder portion of the bearing cylinder, the bearing cylinder can be prevented from rotating and the pitch adjustment state 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 partially longitudinal front view of the link block in FIG. 1;
FIG. 3 is a cross-sectional view of a state in which an eccentric sleeve of a link block is pulled up.
4 is a cross-sectional view of a state in which an eccentric sleeve is rotated 180 ° and set in the state of FIG. 3;
FIG. 5 is an exploded perspective view of a link chain.
6A and 6B show a bearing cylinder, where FIG. 6A is a front view, FIG. 6B is a side view, FIG. 6C is a plan view, and FIG. 6D is a cross-sectional view taken along the line AA in FIG. These are sectional views taken along line BB of the front view.
[Explanation of symbols]
10 Slat Conveyor 11 Frame 12 Drive Unit 13 Support Plate 14 Rubber Rat 15 Guide Rail 16 Block Chain 17 Traveling Rail 18 Traveling Wheel 19 Bolt 20 Link 21 Connecting Pin 22 First Port Portion (Yoke Type) 24 Second Port Portion (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 Shoulder part of bearing cylinder 34 Connecting pin through hole 34a Protrusion 35 Shoulder groove 36 Handle 37 Handle Protruding part 38 Nut 39 Retaining ring 40 Traveling direction

Claims (2)

The projections of a large number of links formed on one side with the yoke and the other with the projections meshing with the yoke are sequentially inserted into the yokes of adjacent links and connected in an endless manner using connection pins. In the slat conveyor with a guide roller at the lower end and a slat attached to the top of the link
Each link yoke part is provided with a connecting pin insertion bearing hole divided into upper and lower parts, and a bearing cylinder having an eccentric part is fitted into the upper bearing hole, and a bush is fitted into the lower bearing hole. ,
Connecting pins common to the bearing cylinder and the bush of each link are inserted, and the bearing cylinders of a plurality of links at arbitrary positions are respectively rotated 180 degrees at the upper end of the bearing cylinder. A chain elongation adjusting device for a slat conveyor, characterized in that a handle capable of changing a link pitch at an arbitrary position by changing a rotation position is provided. 2. A slat conveyor chain according to claim 1, wherein a groove is formed in a shoulder portion of the bearing cylinder, and a protrusion that engages with the groove to prevent the bearing cylinder from rotating is provided on an upper edge of the bearing hole of the link. Elongation adjustment device.

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