JP4099639B2 - Chain elongation adjustment device for slat conveyor - Google Patents

Description

[0001]
The present invention relates to an apparatus for adjusting chain elongation by changing a chain pitch at an arbitrary position of a slat conveyor chain capable of bending or forming a straight conveyance path.
[0002]
[Prior art]
A slat conveyor that can be bent or linearly transported usually combines a lower step formed on the front side of the chain link with an upper step formed on the rear side of the link, and connects a number of links by inserting connecting pins into the overlapped portions. At the same time, a guide roller is attached to the lower end of each connecting pin, and a slat for placing a load on the upper part of the link is attached, and travels on a curved path on a plane.
In the utility model registration No. 2574039 known as such a conveyor, an eccentric head is integrally formed on the upper part of the connecting pin, and the eccentric head can be fitted to the pin hole of the chain link. Slat conveyors are used in various directions. As an example of a slat conveyor, for example, in order to convey an article to a predetermined position, for example, a frame is often formed on a floor surface by, for example, fixing a frame with an anchor bolt and winding it appropriately. An endless chain is run in the central part of the transport path. A large number of slat support members are attached to the upper portion of the chain, and slats made of a rectangular synthetic rubber are attached to the slat support members.
[0003]
The chain of the above conveyor is a combination of a group with links on the left and right sides and a group with links on the top and bottom sides. And it is formed endlessly. Each of the rollers is rotatably provided on the shaft extending in the vertical direction of the cross-shaped shaft, and rolls along a guide provided at a chain erection position of a substantially central claw of the frame. A roller is also rotatably provided on the shaft extending in the left-right direction of the shaft, and this roller rolls along a guide provided on the frame, and the chain is moved along the conveyance path by the driving device. To be moved.
The slat support members are attached to the respective links via fastening members, and the slats attached to these slat support members are arranged at the rear end portion of the slats in the traveling direction of the slat support members, and the front wheels of the following slats. The upper surface is superposed on the lower side, so that articles placed on the slats can be smoothly conveyed without dropping onto the conveyance path.
[0004]
[Problems to be solved by the invention]
However, in the slat conveyor as described above, the chain is stretched due to wear of the connecting shaft, etc. due to long-term use, and the link is loosened, etc. Notch, cause vibration and noise. For this reason, conventionally, this has been dealt with by absorbing the elongation of the chain by moving the track system such as the frame and the traveling rail in accordance with the elongation of the chain. In this moving method of the track system, for example, the connection portion between the curved portion and the straight portion of the conveyor frame is adjusted, but the frame is usually fixed to the floor surface by anchor bolts, and the curved portion It is necessary not only to require extensive work but also to add a lot of work and time, and to replace a worn shaft. Had to disassemble and reassemble chains and link plates.
The present invention adjusts the chain pitch at an arbitrary position by rotating a bearing cylinder having an eccentric pin hole and changing the eccentric position of the pin hole. It is an object of the present invention to provide a slat conveyor that can easily adjust the tension of the chain without moving and without greatly changing the interval between the slat support members.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a front lower step portion corresponding to a substantially lower half thickness of the link is formed on the front side in the longitudinal direction of each link, while a substantially upper half of the link is formed on the rear side in the longitudinal direction. a number of links each connecting pin lower portion to the overlapping portion after having polymerized on each link arranged back and forth to form a side upper portion inserted through after corresponding to the part thickness connected to endless, each In a slat conveyor provided with a guide roller at the lower end of the connecting pin, and attached with a slat for placing a load on the upper part of the link; a bearing hole larger in diameter than the pin hole is provided at the connecting pin insertion position of the rear upper step of each link. Provided, fitting a bearing cylinder having an eccentric pin hole into which the upper half of the connecting pin can be inserted into the rear upper step part of every other link or every few links among the links, After the rest of each link Fitted bushing having a concentric pin hole capable of挿合the upper half of the connection pin in the upper portion; wherein the longitudinal direction of each link upper portion, the connecting pin and the respective top diameter direction of the bush same depth, a groove width; the fitted locking member is in communication with the grooves of the groove and the link upper stepped portion is formed on the top of each connecting pin and bushing, across the link upper of the lock member It is a chain elongation adjusting device of a slat conveyor characterized by being screwed to a part.
In the second aspect of the present invention, when adjusting the length of a link chain in which a large number of links are connected in an endless manner, the bearing cylinder having an eccentric pin hole into which the upper half of the connecting pin can be inserted is fitted. In at least some of the links or every other or several links, after removing the lock member, the eccentric cylinder pin position is changed by rotating the bearing cylinder having the eccentric pin hole. 2. The slat according to claim 1 , wherein the length of the link chain can be adjusted by connecting the groove of the connecting pin and the bearing tube and the groove in the upper step portion of the link so as to fit the lock member. It is a chain elongation adjusting device for a conveyor.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view of a slat conveyor according to an embodiment of the present invention.
The slat conveyor 1 has a slat 5 attached to an upper portion of a bracket 8 fixed with bolts 9 and 9 on the upper surface of each chain 12 constituting the link chain 11, and a front portion of the upstream slat at the rear portion of the downstream slat. Are sequentially overlapped to form a conveyance surface and travel in the direction of arrow 30.
A guide rail 3 is provided at the center in the longitudinal direction of the frame 2 to guide the guide rail 15 attached to the lower end narrow diameter portion 16 of each connecting pin 10, and the traveling rollers 6 are attached to the legs 7, 7 provided on the lower surfaces of the slats. 6 is attached to the left and right support rails 4 and 4 of the frame 2. Each link 12 is, for example, in the lower portion 13 formed in the traveling direction of the front side, while sequentially polymerizing the upper portion 14 formed on the rear side of the front link, bushings on the link upper portion 14 18,19 (FIGS. 2 and 3) are arranged and the connecting pins 10 and 10 are respectively inserted.
[0007]
2 is an enlarged longitudinal sectional view of the link chain in FIG. 1, FIG. 3 is a plan view of FIG. 2, and FIG. 4 is a longitudinal sectional view taken along line AA of FIG.
As shown in the figure, the link 12 has a relatively thick block shape, the front lower step portion 13 has a thickness substantially corresponding to the lower half of the link, and the rear upper step portion 14 is the link. It has a thickness corresponding to the upper half. When the connecting pin 10 is inserted into the overlapping position of the front lower step 13 and the rear upper step 14 of the link 15, a pin hole 17 is formed in the approximate center of the front lower step 13, whereas the rear upper step The part 14 is provided with a bearing hole 20 having a diameter larger than that of the pin hole, and is fitted with a bearing cylinder (pin upper half support cylinder) 18 or 19 having a pin hole for inserting the upper half of the pin. The first bearing cylinder 18 has a concentric pin hole 17a, and the second bearing cylinder 19 has an eccentric pin hole 17b.
Assembling positions and number of the first and second bearing cylinders 18 and 19 in the series of link chains are arbitrary, and as shown in the drawing, the first bearing cylinder 18 having concentric pin holes at the front and rear is connected. or every, or connecting the second bush 19 having a first bush 18 pin hole 17b, an eccentric position on the rear side with a concentric pin holes in front of the number every other link 12 You may do it . In FIG. 4, reference numeral 22 denotes a sleeve fitted into the pin hole 17 of the lower step portion 13 of the link end, and 23 denotes a sleeve fitted to the bearing hole 20 of the upper step portion 14 of the link end. In FIG. 3, illustration of these sleeves is omitted.
[0008]
As described above, this apparatus sequentially superimposes the rear upper part 14 of the front link on the front lower part 13 of the relatively thick block-shaped link 12, and inserts the connecting pin 10 into each superposition part. A plurality of links are connected in an endless manner. Further, a groove 24a is cut in the longitudinal direction of the upper surface of each link upper step portion 14, and a bearing cylinder 18 having a connecting pin 10 and a concentric pin hole 17a. In the top diameter direction, grooves 24b and 24c having the same depth and width as the groove 24a are provided.
The bearing cylinder 19 having the eccentric pin hole 17b has a groove 24c that communicates with the top of the link cylinder 19 and the connecting pin at the top of the bearing cylinder 19 along the eccentric direction of the pin hole, that is, communicates at the origin position or a predetermined angle rotation position. Provided.
Most of the links 12 connected in large numbers are fitted with bearing cylinders 18 having concentric pin holes 17a for supporting the upper half of the pins in the bearing holes 20 of the rear upper step part 14, but several or An eccentric bearing tube 19 having an eccentric pin hole 17b is fitted to the rear upper step portion 14 of the plurality of links 12.
[0009]
2-4, when connecting and assembling the chain, the direction of the groove 24a of the link upper step 14 and the direction of the groove 24b at the top of the connection pin 10 and the direction of the groove 24c at the top of the bearing cylinders 18 and 19 are combined. The groove is in a communicating state, and a locking member 25 common to the groove is fitted and prevented from rotating, and then fixed to the link upper step portion 14 using screws 26 and 26 near both ends of the locking member 25 to obtain a constant pitch. The link chain connected by P is completed. Each connecting pin 10 is prevented from coming off by attaching a retaining ring 27 to the upper edge of the lock member 25 and the lower part of the lower step part 13 (FIG. 2).
[0010]
FIG. 5 is an enlarged longitudinal sectional view of the link chain when the pitch is adjusted, and FIG. 6 is a plan view thereof.
When the chain is stretched by the transport operation of the slat conveyor, the pitch can be adjusted by changing the eccentric position of the eccentric bearing tube 19 and penetrating the pin.
That is, after removing the lock member 25 on the eccentric bearing tube 19 side, the eccentric bearing tube 19 is rotated (180 ° in the illustrated example) to change the eccentric position of the pin hole 17b, and the grooves 24a, 24b, and 24c are in communication. After that, the lock member 25 is fitted again. In this way, the chain pitch P at any position can be adjusted to the pitch P1. For example, when the basic chain pitch P is 200 mm ± 0.2, it is changed to 205 mm. Therefore, when the chain length is shortened by 15 mm, the chain elongation can be adjusted by rotating and reassembling the eccentric bearing cylinders of the three links at arbitrary positions by 180 °.
In this way, when only the eccentric portion of the connecting pin 10 by the eccentric bearing cylinder 19 is set long, the slat conveyor is run, and when the chain pitch is extended due to wear or the like of the connecting shaft by long-term use, The pitch can be easily adjusted by changing the position.
[0011]
【The invention's effect】
As described above, according to the present invention, the chain pitch at an arbitrary position can be adjusted by rotating a bearing cylinder having a pin hole at an eccentric position by a predetermined angle and penetrating the connecting pin. Also, grooves of the same depth and width are provided in the longitudinal direction of each link upper step part and the top pin diameter direction of the connecting pin and the bearing tube, and a lock member in which these grooves are in communication is fitted, and both ends of the lock member are fitted. Since the screw is fixed to the upper stage portion of the link, it is possible to secure the rotation prevention of the connecting pin with respect to the bearing tube.
[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 an enlarged vertical sectional view of the link chain in FIG.
FIG. 3 is a plan view of FIG. 2;
4 is a longitudinal sectional view taken along line AA in FIG. 3;
FIG. 5 is an enlarged longitudinal sectional view of the link chain when the pitch is adjusted.
6 is a plan view of FIG. 5. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Slat conveyor 2 Frame 3 Guide rail 4 Support rail 5 Slat 6 Traveling roller 7 Leg 8 Bracket 9 Bolt 10 Connection pin 11 Link chain 12 Link 13 Lower step 14 Upper step 15 Guide roller 16 Pin Small diameter part 17, 17a, 17b Pin Hole 18 Bearing cylinder 19 Eccentric bearing cylinder 20 Bearing holes 24a, 24b, 24c Groove 25 Lock member 26 Screw 27 Retaining ring 30 Traveling direction

Claims (2)

A front lower step corresponding to substantially the lower half thickness of the link is formed on the front side in the longitudinal direction of each link, while a rear upper step corresponding to the thickness of the upper half of the link is formed on the rear side in the longitudinal direction. and inserted through a respective connecting pin lower portion to the overlapping portion after having polymerized on the arranged respective links connecting the plurality of links in an endless shape, while providing a guide roller to the lower end of each connecting pin, the upper link In slat conveyors with slats to load loads,
A bearing hole having a diameter larger than that of the pin hole is provided at the connecting pin insertion position of the rear upper step portion of each link, and the connecting pin is provided at the rear upper step portion of at least every other or several links among the links. A concentric pin that fits a bearing cylinder having an eccentric pin hole into which the upper half of the link can be inserted, and can insert the upper half of the connecting pin into the remaining rear upper step of each link Fit the bearing cylinder with the hole,
A groove having the same depth and width is provided in the longitudinal direction of each link upper step part and in the top diameter direction of the connecting pin and the bearing tube,
Fit the locking member and the said grooves of the groove and the link upper stepped portion is formed on the top of each connecting pin and bushing in communication with, screwed at both ends of the lock member in the link upper portion,
A device for adjusting chain elongation of a slat conveyor. When adjusting the length of a link chain in which a large number of links are connected in an endless manner, at least one of the links fitted with a bearing tube having an eccentric pin hole into which the upper half of the connecting pin can be inserted. In some links or every other or several links, the lock member is removed, and the bearing cylinder having the eccentric pin hole is rotated to change the eccentric position of the pin hole. 2. The chain extension adjustment of the slat conveyor according to claim 1 , wherein the length of the link chain can be adjusted by making the groove communicate with the groove of the bearing tube and the link upper step portion to fit the lock member. apparatus.

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