JP2555742Y2 - Driven sprocket wheel for multi-story parking equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driven sprocket wheel for a multistory parking device.

[0002]

2. Description of the Related Art In general, a multi-story parking device has a chain in which a driving sprocket wheel is pivotally supported at the top of a building, a driven sprocket wheel is pivotally supported at the bottom of the building, and a car loading basket is mounted between the two sprocket wheels. It is wound around and the vehicle gets on and off at the bottom of the building, that is, near the driven sprocket wheel. Therefore, if the play between the driven sprocket wheel and the chain link is large in the axial direction of the driven sprocket wheel,
When the vehicle gets on and off, the chain moves laterally in the axial direction of the driven sprocket wheel, and as a result, the car loading basket shakes greatly, hindering the getting on and off of the vehicle and causing noise. Therefore, in order to eliminate backlash between the driven sprocket wheel and the chain link, conventionally, the driven sprocket wheel for a multi-story parking device has an inner width of 8 times the chain link.
A tooth thickness of 0 to 90% is used. That is, usually
Since the inner width of the chain link for the multi-story parking device is about 60 mm, a driven sprocket wheel having a tooth thickness of about 50 mm was used.

[0003]

The driven sprocket wheel for a multi-story parking device has a diameter of, for example, 180 by its nature.
Since the tooth thickness is as large as 0 mm, when the tooth thickness is set to about 50 mm, the tooth becomes very heavy and a large amount of material is consumed. Also, when integrally manufactured with cast steel, the casting equipment becomes large, the coarse material weight relative to the finished product is large, 1.3 to 1.4, so the material unit price increases, and the product supply time is specified because of the cast product. There was a problem that it was done. In addition, the portion that fits inside the chain link, that is, the portion between the tooth grooves of the sprocket wheel, needs to be reduced in thickness toward the large diameter side in order to smoothly fit into the chain link. There is a problem that a large machine tool is required for this machining.

Further, when a sprocket wheel is manufactured by machining, the tooth thickness is as large as about 50 mm. Therefore, when a tooth groove is formed by fusing, a fusing sag occurs, and it is necessary to accurately obtain the perpendicularity of the sprocket wheel in the radial direction. However, there is a problem that it is necessary to perform cutting by a large machine tool after fusing. In addition, if the outer ring portion and the intermediate spoke portion are separately manufactured and welded in order to reduce the weight of the sprocket wheel, the number of manufacturing steps increases, and if the manufacturing steps are reduced, the weight cannot be reduced. was there. Therefore, an object of the present invention is to provide a driven sprocket wheel for a multi-story parking device which is lightweight and easy to manufacture.

[0005]

The driving sprocket wheel of the multi-story parking device is subjected to all loads such as chains, baskets, automobiles, etc., and the driving sprocket wheel must be strong enough to withstand all these loads. . However, the driven sprocket wheel only exerts a tension at best to give a necessary take-up to the chain. It is. Therefore, even if the tooth thickness of the driven sprocket wheel is reduced, there is no problem in strength, and the play between the driven sprocket wheel and the chain link caused by reducing the tooth thickness can be solved by another means.

The present invention has been made in view of this point, that is, a spoke plate having tooth grooves which engage with the chain at equal angular intervals on the outer peripheral surface, and a gap between adjacent tooth grooves of the spoke plate. This is a driven sprocket wheel for a multi-story parking device having a plurality of pairs of corresponding plate pieces which are welded to each of the front and back surfaces and whose large-diameter portion is reduced in thickness toward the large-diameter side.

[0007]

When the width of each pair of contact plates is formed to be 80 to 90% of the inner width of the chain link, play between the chain link and the driven sprocket wheel can be eliminated, and at that time, the spoke Since there is no longer any need to consider the above-mentioned backlash in the plate, the thickness can be reduced to the minimum necessary for strength, so that the driven sprocket wheel can be significantly reduced in weight. In addition, since the spoke plate is significantly reduced in thickness, even if a tooth groove is formed only by fusing, no fusing sagging occurs, so that subsequent steps can be omitted or reduced. Since the welding to the sprocket is simple, the driven sprocket wheel of the present invention is light in weight and easy to manufacture.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 and 2 show an embodiment of the present invention. The driven sprocket wheel 1 for a multi-story parking device comprises a boss 2, a spoke plate 3,
The spoke plate 3 is formed of carbon steel for machine structure, and the corresponding plate piece 4 is formed of rolled steel material for general structure. First, the boss 2 formed in a cylindrical shape is a portion rotatably supported by a shaft (not shown) via a bearing (not shown). The flat spoke plate 3 has a hole on the inner peripheral surface which is fitted and welded to the outer peripheral surface of the boss 2, the outer peripheral surface is formed in a circular shape, and a total of 12 tooth grooves 3 a are formed at intervals of 30 ° on the outer peripheral surface. Is provided,
The tooth groove 3a engages with a chain roller (not shown). Each pair of corresponding plate pieces 4, 4 are welded W to the front and back surfaces at the center between adjacent tooth grooves 3a, 3a of the spoke plate 3, the small diameter side portion 4a is formed in parallel, and the large diameter side portion 4b is formed.
Is formed on an inclined surface having a reduced thickness toward the large diameter side. This driven sprocket wheel has a link inner width of 60.
mm, and the width of the small-diameter side parallel portions 4a, 4a between the pair of front and back plate pieces 4, 4 is 49 m.
m, and the thickness of the spoke plate 3 is 25 mm.

This embodiment is configured as described above.
Since the spoke plate 3 is a mere flat plate, the spoke plate 3 can be cut out from a steel plate. Further, since the thickness is as thin as 25 mm, even if the formation of the tooth space 3a is performed by fusing, there is no flap sag. It can be reduced or alleviated. Further, the entire sprocket wheel 1 is formed by simply welding the boss 2 and the corresponding plate piece 4 to the thin spoke plate 3 and the welding line is simple. The driven sprocket wheel 1 is easy.

[0010]

According to the present invention, a driven sprocket wheel for a multi-story parking device which is lightweight and easy to manufacture is obtained.

[Brief description of the drawings]

FIG. 1 is a partial front view of an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1 in which a side surface of the plate is omitted, and FIG.

[Explanation of symbols] 1 ... driven sprocket wheel 2 ... boss 3
... Spoke plate 3a ... Tooth groove 4 ... Touch plate piece 4
a: small diameter side parallel part 4b: large diameter side inclined surface W: welding

Claims (1)

(57) [Scope of request for utility model registration] 1. A spoke plate formed with tooth grooves engaging with a chain at equal angular intervals on an outer peripheral surface, and a large-diameter side portion is welded to each of front and back surfaces between adjacent tooth grooves of the spoke plate. A driven sprocket wheel for a multi-story parking device, comprising: a plurality of pairs of abutment pieces whose thickness is reduced toward a radial side.