JPH04887B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a dust-proof cover device for a chain that drives, for example, a running fork for loading and unloading cargo, a lifting carriage of a traveling crane for loading and unloading, and the like.

(Prior art and its problems) For example, a traveling crane for loading and unloading warehouses as shown in FIG. 1 is used in automated warehouses. This crane 1
The carriage is equipped with an elevating carriage 3 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 that drives the lifting carriage 3 up and down, and has both ends locked to the lifting carriage 3 and is pivotally supported at both upper and lower ends of one of the pillars 2. A pair of upper and lower guide gear wheels (a pair of upper and lower guide gear wheels (sometimes a guide rail is used) is stretched along the elevating path of the elevating carriage 3 by guide rails 6a and 6b (sometimes a guide rail is used). Turn guide, sometimes a fixed chain guide rail is used instead of gear wheels) 7a, 7b
It is suspended from the drive gear wheel 8 of the drive device via the drive gear wheel 8, and is configured so that the elevating carriage 3 can be raised or lowered by rotating the drive gear wheel 8 and rotating the drive chain 5 in forward and reverse directions. ing.

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. 13 is provided, and between the scandary fork 10 and the primary fork 11, a rightward drive chain 14 and a leftward drive chain 1 are provided.
5 is stretched. Rightward drive chain 14
is a guide gear wheel (turn guide, gear wheel) whose both ends 14a and 14b are locked near the left end of the primary fork 11 and near the left end of the base frame 9, and whose middle part is pivotally supported near the right end of the secondary fork 10. (in some cases, a fixed chain guide rail is used) 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. At the same time, the intermediate part is suspended from a guide gear wheel (a turn guide, a fixed chain guide rail may be used instead of a gear wheel) 17 which is pivotally supported near the left end of the secondary oak 10, and the motor 18 Rotate the driving pinion gear 12 to rotate the secondary fork 1.
0 to the right or left with respect to the base frame 9, the primary fork 11 moves to the right or left with respect to the secondary fork 10 by the rightward drive chain 14 or the leftward drive chain 15. It is configured to move under tension.

The lifting carriage driving chain 5 and the primary fork driving chains 14 and 15 in the running fork 4 as described above connect the moving pair (the lifting carriage 3 and the primary fork 11) that reciprocate along a fixed path and the moving body. The chain is stretched between the supporting body (crane frame or base frame 9) so that the length of the chain path between both ends of the chain is constant. Unlike the 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 device 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 respectively locked to a moving body or a support body that locks the corresponding chain ends, and the chain cover belt is placed outside the turn part of the chain. A belt turn guide for guiding the chain is attached to a member supporting the turn guide, such as a guide gear for turning the chain, and a tensioning means for the belt is further provided.

(Example) The following describes the chain 14, 1 that drives the primary fork 11 in the running fork 4.
An embodiment in which the present invention is applied to the case 5 will be described based on FIGS. 3 and 4.

Reference numeral 20 denotes a chain cover belt, which is disposed along and outside the chain 14 or 15, and whose both ends 20a and 20b are primary belts that lock the corresponding chain ends 14a and 14b or 15a and 15b, respectively. The chain cover is fixed to the fork 11 or the base frame 9 and is installed along the chain 14 or 15 on the outside of the part where the chain 14 or 15 turns by the guide gear wheel 16 or 17 as a turn guide. A belt turn guide 21 for turning the belt 20 is attached to the secondary fork 10, which is a member that supports the guide gear wheel 16 or 17 (turn guide). 22 is a bolt that fixes the belt end 20a to the primary fork 11 side, and 23 is a bolt that fixes the belt end 20a to the primary fork 11 side;
This is a belt tensioning means that locks the belt end portion 20b on the side.

The belt tensioning means 23 includes a guide rod 24
Belt end locking member 25 slidably supported by
and a spring 26 that biases the locking member 25 in the belt tensioning direction.The belt end 20b is fixed to the belt end locking member 25 by a bolt 27. Note that 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 to the guide rod 29, a spring 31 that biases the locking member 30 in the chain tensioning direction, and the guide rod. 29, and the bearing 3
The guide rod 29 is supported so as to be rotatable only with respect to the bearing 34, and by rotating the guide rod 29, the spring bearing 33 is moved to the bearing 32. The biasing force of the spring 31 can be adjusted by moving it in and out of the spring 31.

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 against the chain 14. or 15
Exactly the same movement as , always with chain 14 or 1
This will cover the outside of 5. 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.

(Operations and Effects of the Invention) As described above, according to the chain cover device of the present invention, when the movable body is moved relative to the support body by the movable body driving chain, the chain cover belt is connected to the chain. It moves in exactly the same way and can always cover the outside of the chain. Furthermore, since an appropriate tension is always applied by the tensioning means, there is no fear that the chain cover belt will come into contact with the chain and interfere with the intended driving action. Therefore, a high dustproof effect can be obtained for the chain for driving the moving body, and the driving action of the chain can be performed smoothly and satisfactorily over a long period of time.

[Brief explanation of drawings]

Figure 1 is a front view of the traveling crane for loading and unloading, Figure 2
The figure 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 front view of the same. 1... Traveling crane for loading and unloading, 3... Lifting carriage, 4... Running fork, 5... Lifting carriage drive chain, 9... Base frame, 10... Secondary fork, 11... Primary fork, 14, 15... Primary fork drive chain, 16, 17... Guide gear wheel (turn guide), 20... Belt for chain cover, 21... Belt turn guide, 22, 27
...Bolt, 23...Chain tensioning means, 24,2
9... Guide rod, 25... Belt end locking member, 26, 31... Spring, 28... Chain tensioning means, 30... Chain end locking member, 33...
...Spring receiver.

Claims (1)

[Claims] 1 In a device 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 disposed outside the chain along with the chain for driving the movable body, and both ends of this belt are respectively locked to the movable body or support body that locks the corresponding end of the chain; On the outside of the turn of the chain,
A chain cover device comprising: a belt turn guide that guides the chain cover belt; and a belt turn guide that is attached to a member that supports the chain turn guide, and further includes tensioning means for the belt.