JPS62167112A - Chain cover construction - Google Patents

Abstract

PURPOSE:To obtain a high dustproof effect for a chain, by stopping both ends of a chain covering belt, arranged outside the chain for driving a mover, to a respectively corresponding mover or supporter while providing a belt U-turn guide to be arranged inside said belt. CONSTITUTION:A chain covering belt 20 is arranged along a chain 14 or 15 in the outside of said chain, and both ends 20a, 20b of the belt 20 are stopped to a fork 11 or a base frame 9 which stops each corresponding chain end part 14a, 14b or 15a, 15b. Further a belt U-turn guide 21 is fixedly provided inside the belt 20 which similarly performs a U-turn outside a guide toothed wheel 16 or 17 in a U-turn part of the chain 14 or 15. And a belt tensioning means 23, which stops the belt end part 20b, is provided in a side of the base frame 9. As the result, a high dustproof effect for the chain is obtained.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a dustproof cover structure for a chain that drives, for example, a running fork for loading and unloading, a lifting carriage for a lane for loading and unloading, etc. .

(Prior art and its problems) Automated warehouses use, for example, lanes for entering and exiting warehouses as shown in FIG. This crane 1 includes an elevating carriage 3 that is provided between a pair of front and rear supports 2 so as to be movable up and down along the support supports 2, and a running fork 4 for transferring loads provided on the elevating carriage 3. . Reference numeral 5 denotes a chain for driving the lifting carriage 3 up and down, and the chain 5 is connected to the lifting path of the lifting carriage 3 by guide gear wheels 6a and 6b, which are locked at both ends to the lifting carriage 3 and are pivotally supported at both upper and lower ends of one of the pillars 2. A pair of upper and lower guide gear wheels 7a are stretched along the guide gear wheels 6a and 6b.
The lift carriage 3 is suspended from the drive gear wheel 8 of the drive device via the drive gear 7b, and is configured to be able to raise or lower the elevating carriage 3 by rotating the drive gear wheel 8 and rotating the drive chain 5 in forward and reverse directions. has been done.

On the other hand, the running fork 4 consists of a base frame 9, a secondary fork 10, and a primary fork 11, as shown in FIG. A rack gear 13 that meshes with the secondary fork 10 and the primary fork 11 is provided with a rightward drive chain 14 and a leftward drive chain 1.
5 is stretched. The rightward drive chain 14 has both ends 14a and 14b locked near the left end of the primary fork 11 and near the left end of the base frame 9, and a guide tooth wheel pivotally supported in the middle near the right end of the secondary fork 10. 16, and the left-going drive chain 15 has both ends 15a and 15b locked near the right end of the primary fork 11 and near the right end of the base frame 9, and has an intermediate shaft near the left end of the secondary fork 10. The secondary fork 10 is suspended from the supported tooth ring 17 in the socket, and when the driving pinion gear 12 is rotated by the motor 18 and the secondary fork 10 is moved to the right or left with respect to the base frame 9, this secondary - The primary fork 11 is configured to be moved by being pulled to the right or left by the rightward driving chain 14 or the leftward driving chain 15 relative to the fork 10.

The lifting carriage driving chain 5 and the primary fork driving chain 14, 15 in the running fork 4 as described above are connected to a movable body (the lifting gear 3 and the primary fork 11) that reciprocates along a fixed path, and The chain is stretched between the support body (crane frame or base frame 9) that supports the chain so that the length of the chain path between both ends is constant. Unlike a transmission chain, the chain path itself moves. Therefore, it has not been possible to attach a dustproof cover to the transmission chain, which has a constant chain path.

(Means for Solving the Problems) The present invention proposes a chain cover structure capable of solving the above-mentioned problems, and its characteristics are as follows: A chain cover belt is arranged on the outside, and both ends of this belt are locked to a moving body or a support body that locks the corresponding chain end, and the chain is also made a U-turn outside the U-turn part of the chain. According to the chain cover structure of the present invention, a heald l-U turn guide is disposed inside the belt, and a tensioning means for the heald is further provided (Operations and Effects of the Invention). When the movable body is moved relative to the support body by the movable body driving chain, the chain cover belt moves in exactly the same manner as the chain, and can always cover the outside of the chain. Moreover, since an appropriate tension is always applied by the tensioning means, there is no fear that the belt for the chain puller will come into contact with the chain and interfere with the intended driving action.

Therefore, a high dust-proofing effect can be obtained for the moving body driving chain, and the driving action of the chain can be performed smoothly and well over a long period of time.

(Example) Below is the primary in the running fork 4.
An embodiment in which the present invention is applied to chains 14 and 15 that drive a fork 11 will be described with reference to FIGS. 3 and 4.

Reference numeral 20 denotes a chain cover belt, which is attached to the chain 14.
or 15 on the outside of the chain, the ends 20a, 20b of which are connected to the corresponding chain ends 14a, +
4b or 15a, 15b, the belt is locked to the primary fork 11 or base frame 9 that locks, and also makes a U-turn at the U-turn portion of the chain 14 or 15, that is, the outside of the guide gear wheel 16 or 17. A belt return guide 21 is fixed inside the belt 20.

22 is a heald end 20a on the primary fork 11 side.
23 is a heald tensioning means for securing the belt end 20b to the base frame 9 side.

The belt tensioning means 23 includes a heald end locking member 25 slidably supported by a guide rod 24, and a spring 26 that biases the locking member 25 in the heald tensioning direction. A: The belt end portion 20b is fixed to the locking member 25 with a bolt 27. The biasing force of the spring 26 can also be configured to be adjustable.

Reference numeral 28 denotes tensioning means for the chain 14 or 15, which includes a chain end locking member 30 that is slidably and loosely fitted on the guide rod 29, a spring 31 that biases the locking member 30 in the chain tensioning direction, and It consists of a spring receiver 33 that is screwed into the threaded shaft portion 29a of the guide rod 29 and supported by a bearing 32 so that it can only slide in the length direction of the guide rod, and the guide rod 29 is supported so that it can only rotate relative to the bearing 34. By rotating the guide rod 29 and moving the spring receiver 33 in and out of the bearing 32,
The urging force of the spring 31 can be adjusted.

The function of the chain 14 or 15 is as described above, and when the primary fork 11 is moved relative to the secondary fork 10 by the function of the chain 14 or 15, the chain cover belt 20 moves as described above. It performs exactly the same movement as chain 14 or 15, and always covers the outside of chain 14 or 15. Further, the chain cover belt 20 is always kept under tension by the spring 26 of the chain tensioning means 23, and does not come into contact with the chain 14 or 15 due to loosening.

Incidentally, the present invention can be similarly applied to the chain 5 that drives the lifting carriage 3 of the crane 1 shown in FIG. 1 up and down.

[Brief explanation of drawings]

Fig. 1 is a front view of a lane for entering and exiting a warehouse, Fig. 2 is a schematic perspective view of a running fork, Fig. 3 is a partially cutaway side view showing an embodiment of the present invention, and Fig. 4 is a partially cutaway view of the same. It is a front view. DESCRIPTION OF SYMBOLS 1... Lane for entering/exiting the warehouse, 3... Elevating carriage, 4... Running fork, 5... Chain for driving the elevating carriage, 9... Base frame, 10...
・Secondary fork, 11...Primary fork, 14.15...Primary fork drive chain, 16.17...Guiding tooth ring, 20...Belt for chain cover, 21...Chain U-turn guide, 22
．． 27... Bolt, 23... Chain tensioning means, 24
29... Guide rod, 25... Heald end locking member, 26.31... Spring, 28... Chain tensioning means, 30... Chain end locking member, 33...
Spring holder. Figure f

Claims (1)

[Claims] In an apparatus in which a chain for driving a moving body is stretched between a moving body that reciprocates along a fixed path and a support body that supports the moving body, so that the length of the chain path between both ends of the chain is constant, A chain cover belt is arranged along the chain for driving the movable body and outside the chain, and both ends of this belt are respectively locked to the movable body or support body that locks the corresponding end of the chain, and the belt is connected to the movable body driving chain. A chain cover structure comprising: a belt U-turn guide disposed inside the belt which similarly makes a U-turn on the outside of the U-turn portion of the chain cover; and a tensioning means for the belt.