JPH0528295Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a chain jamming prevention device in a parking device.

(Prior Art) Conventionally, in a mechanical parking device, a drive motor connects a chain to a sprocket provided on the drive shaft of the drive motor, and pulls the chain from the pallet side to the drive motor side, or The pallet was raised and lowered by feeding the pallet from the side to the pallet side. and,
The excess chain on the drive motor side was often left hanging to the side of the support column.

(Problem that the invention aims to solve) However, the excess chain that has been pulled into the drive motor side may hang down next to the support column in a bent state, and when the chain is sent out to the pallet side again in this bent state, the chain Occasionally, the sprocket would get stuck or the teeth would fly.

As a countermeasure to this problem, a holding plate was installed near the side of the sprocket to prevent the hanging chain from bending, but it was not perfect as it only prevented the chain from bending from the outside. was installed to apply tension to the chain to prevent bending.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a chain jamming prevention device that reliably prevents a sagging chain from bending.

(Means for solving the problem) In the chain jamming prevention device in the parking device of the present invention, a chain is connected to a sprocket wheel that is attached to a drive shaft, and the pallet can be raised and lowered by pulling in or sending out the chain. In the parking device configured as above, a first holding member is provided below the sprocket wheel, and the lower end portion of the inwardly bent chain on the sprocket wheel side comes into contact with the bent portion of the chain to remove this bending. Also, a second holding member is provided, which is disposed opposite to the first holding member and whose lower end portion comes into contact with a bending part of the chain bent outward opposite to the sprocket wheel to remove the bending, and The lower end of the holding member is disposed below the lower end of the first holding member, and after the chain bent outward opposite to the sprocket wheel is released, the chain is bent inward of the sprocket wheel. configured to unbend the chain;
The side edge of the first holding member on the slack side of the chain and the side edge of the second holding member opposite to the side edge allow the chain, whose bend has been removed by the first holding member, to be attached to the sprocket wheel. A guide passage is formed to guide the person.

(Function) When the chain is fed out, the bent part of the chain bent outward comes into contact with the lower end of the second holding member, and the bend is removed by this impact, and the chain bent inward is removed. When the bent portion comes into contact with the first holding member, the bending portion is removed by the impact, and thereafter, the bent portion is connected to the sprocket while being guided by the guide passage.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 3 is a side view schematically showing the overall configuration of the two-stage parking device 1, and FIG. 4 is a front view thereof.

In the same figure, 2 is a support, 3 is a slider, and 4 is a support.
is a pallet, 5 is a beam member, and 6 is a drive motor.

In other words, the left and right pillars 2, 2 that are erected to face each other
A chain 8 is provided between the upper ends 2a, 2a to suspend the pallet support 7, and the pallet support 7
The pallet 4 is fixed on top of the pallet 4, and the chain 8 is pulled in or sent out by the drive motor 6 provided at the upper end 2a of the support column 2.
It is configured to move up and down. This chain 8
is the upper end 2 of one of the pillars 2 (in this example, the left side)
from a to the slider 3 of the pallet support 7,
3. Through the beam member 5, engage the sprocket wheel 9 of the drive motor 6 provided at the upper end 2a of the other support 2 (in this example, on the right side), and let the remaining chain 8 hang down to the side of the support 2. There is. Therefore,
As shown in FIGS. 1 and 2, the engagement portion between the sprocket wheel 9 and the chain 8 is provided with a chain bite prevention device 10 to prevent the chain 8 from being caught due to bending.

In FIGS. 1 and 2, 11 is a drive shaft;
9 is the sprocket wheel, 8 is the chain, 1
2 and 12 are side plates, 13 and 13 are first holding members, 1
4 indicates a second pressing member.

The sprocket wheel 9 is attached to the drive shaft 11, and the chain 8 is engaged with the gear portion 9a. This chain 8 connects to the sprocket wheel 9
Chain 8 is on one side (the left side in this example) of
The pulling side A is used for pulling in and sending out the chain, and the other side (the right side in this embodiment) is the slack side B where the excess chain 8 hangs down. Side plates 12 are provided on both sides of the sprocket wheel 9 and near the slack side B. This side plate 1
2 and 12 are separated at a predetermined interval by a distance piece 15, and the first holding member 1 is placed in the gap.
3 and 13 and a second holding member 14 are provided and fixed with bolts 20.

The first holding members 13, 13 are fitted around the outer circumferences of boss portions 9b, 9b which protrude from both sides of the sprocket wheel 9, respectively. This first pressing member 13,1
The outer edge of the upper part of 3 is the sprocket wheel 9.
It is formed in a semicircular shape with a slight gap between the inner link 8a and the outer link 8b of the chain 8 which are connected to each other, and the lower part of the first holding members 13, 13 located below the sprocket wheel 9 Link holding parts 13c, 13c are formed. Also, the first
The side edge of the slack side B of the presser members 13, 13 has a K-shaped bent surface 13d, 13 from the upper part to the lower part.
It is formed in d. These first holding members 13, 13 are fixed to the side plates 12, 12 with bolts 20 via a distance piece 15 between the link holding parts 13c, 13c.

The second holding member 14 is provided near the slack side B of the sprocket wheel 9. The inner side edge of the second holding member 14 located on the chain side forms a bow-shaped bent surface 14a so as to guide the chain bush 8c of the chain 8, and the bent surface of the first holding member 13, 13 13d and 13d form a guide path C for the chain 8. Further, a bushing holding portion 14b is provided at the lower end of the inner side edge of the second holding member 14. The second presser member 14 is fixed to the side plates 12, 12 with bolts 20 by providing distance pieces 15 at appropriate locations (in this embodiment, three locations) on both the left and right sides.

In this way, the first presser members 13, 13 and the second
The side plates 12, 12 provided with the pressing member 14 are kept in this state by a suitable rotation stopper (not shown). Next, the operation of the chain jamming prevention device 10 will be explained.

First, when pulling the chain 8 from the pallet 4 side to the drive motor 6 side, the drive motor 6
Rotate the sprocket wheel 9 in the clockwise direction in the figure and guide the chain 8 on the tension side A through the guide passage C from the tension side A while moving the chain 8 on the slack side B.
to draw into. At this time, the first holding members 13, 13 guide the inner link 8a and the outer link 8b of the chain 8, and the second holding member 14 guides the chain bush 8c of the chain 8.

Next, when sending the chain 8 from the drive motor 6 side to the pallet 4 side, when the chain 8 on the slack side B is bent, the bent part of the chain 8 bent outward on the side opposite to the sprocket wheel 9 The bush 8c of D collides with the bush holding portion 14b of the second holding member 14, and the bending of the bent portion D of the chain 8 is removed by this impact. In addition, the bent portion E of the chain 8 bent inward on the sprocket wheel 9 side has an inner link 8a and an outer link 8b connected to the link holding portion 1 of the first holding members 13, 13.
3c and 13c, and this impact removes the bend in the bend E of the chain 8. after that,
The chain 8 from which the bend has been removed is guided to the guide path C, that is, the inner link 8a and the outer link 8b
is guided by the curved surface 13d of the first presser members 13, 13, and the chain bush 8c is guided by the curved surface 14a of the second presser member 14, and sent out to the tension side A.

In this way, the inward bending of the chain 8 is
The chain 8 is removed by the holding member 13, and the outward bend of the chain 8 is removed by the second holding member 14, and the chain 8 with the bend removed is guided through the guide path C.
Since the chain 8 is guided through the sprocket wheel 9 to the sprocket wheel 9, it is possible to reliably prevent the chain 8 from biting into the sprocket wheel 9 and from skipping teeth.

(Effects of the invention) As described above, according to the invention, inward bending of the chain is removed by the first holding member, and outward bending of the chain is removed by the second holding member, Since the chain with its bend removed is guided to the sprocket wheel through the guide path C, it is possible to provide a highly reliable device that can reliably prevent the chain from biting into the sprocket wheel and tooth skipping. .

[Brief explanation of the drawing]

1 to 4 show the drawings of the present invention, FIG. 1 is a partially cutaway front view of the chain jamming prevention device, FIG. 2 is a sectional view taken along the - line of FIG. 1,
FIG. 3 is a side view schematically showing the overall configuration of the two-stage parking device, and FIG. 4 is a front view thereof. 8... Chain, 9... Sprocket wheel, 10... Chain bite prevention device, 13...
First presser member, 14...second presser member.

Claims (1)

[Scope of Claim for Utility Model Registration] In a parking device in which a chain is connected to a sprocket wheel that is pivotally attached to a drive shaft, and a pallet can be raised and lowered by pulling in or sending out the chain, below the sprocket wheel. In this case, the bent part of the inwardly bent chain on the sprocket wheel side comes into contact with the lower end, and the first part removes this bend.
A holding member is provided, and a second holding member is provided, which is disposed opposite to the first holding member and whose lower end portion comes into contact with a bent portion of the chain bent outwardly opposite to the sprocket wheel, thereby eliminating the bending. and the lower end of the second pressing member is connected to the first
The holding member is disposed below the lower end of the holding member and is configured to release the inwardly bent chain of the sprocket wheel after releasing the outwardly bent chain opposite to the sprocket wheel. Further, the chain whose bend has been removed by the first holding member is formed between a side edge of the first holding member on the slack side of the chain and a side edge of the second holding member opposite to the side edge. A chain jamming prevention device for a parking device, characterized in that a guide path is formed to guide a sprocket wheel.