JPH051560Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention provides at least three screw shafts vertically on both sides of a fixed frame body, and a vehicle is mounted between these screw shafts. The present invention relates to a multilevel parking system in which nuts screwed into respective screw shafts are provided on both sides of a pallet, and the nuts are rotationally driven in conjunction with each other to raise and lower the pallet.

[Prior art]

In this type of multilevel parking device, as shown in, for example, Japanese Utility Model Application Publication No. 56-29076, each screw shaft is attached to a fixed frame so that the position of the support portion does not change.

[The problem that the idea attempts to solve]

In such conventional technology, there is a difference in the spacing between each screw shaft and the spacing between each nut due to errors in the positions of the mounting parts of each screw shaft and nut, and there is also an error in the parallelism of the screw shafts. The difference in spacing changes as the pallet moves up and down. This difference in the distance between the two is absorbed by the elastic deflection (bending) of the screw shaft, but such deflection generates a reaction force on the screw shaft, increasing the frictional force between the screw shaft and the nut. For this reason, when lifting and lowering the pallet, the load on the lifting motor increases, leading to overheating, and there is a problem that the screw shafts and nuts become severely worn.

The object of the present invention is to reduce the frictional force between the screw shaft and the nut due to such causes, thereby reducing the load on the lifting motor and also reducing wear on the screw shaft and the nut.

[Means to solve the problem]

For this purpose, the multilevel parking device according to the present invention has at least three screw shafts 20 vertically provided on both sides of the fixed frame 10, as illustrated in the attached drawings.
, a pallet 30 located between the screw shafts on which a vehicle is mounted, and a plurality of nuts 40 supported on both sides of the pallet so as to be rotatable only around a vertical axis and screwed into each of the screw shafts 20. Then, these nuts are rotated in conjunction with each other to rotate the pallet 3.
In the multi-story parking apparatus, the screw shaft 20 has an upper end 20a slidably supported on the fixed frame 10 and unrotatable about the axis, and a lower end 20b supported by the screw shaft 20. It is characterized in that it is movable laterally with respect to the fixed frame 10.

[Effect]

Each nut 40 is rotationally driven by a motor in conjunction with each other, and moves up and down along the screw shaft 20 to raise and lower the pallet 30. The difference between the spacing between the screw shafts 20 and the spacing between the nuts 40 is that the screw shafts 20 whose fulcrum is near the upper end 20a supported by the fixed frame 10
It is absorbed by the rocking of the screw shaft 20 with almost no reaction force, and no elastic deflection is generated in the screw shaft 20.

[Effect of idea]

As described above, according to the present invention, the difference in the spacing between the screw shaft and the nut that raises and lowers the pallet due to manufacturing errors and assembly errors can be absorbed without generating almost any reaction force. The frictional force between the screw shaft and the nut will not increase or change due to the difference in . Therefore, the load on the lifting motor is reduced, preventing overheating and uneven operation, and reducing wear on the screw shaft and nut.

〔Example〕

First, a first embodiment shown in FIGS. 1 to 4 will be explained.

As shown in FIGS. 2 to 4, the fixed frame 10 of the multi-story parking device has left and right bases 11 connected by a connecting member 12 and installed on the ground G, and each base 1.
It is composed of four pillars 13 vertically installed and fixed on the top of the pillar 1 through connecting fittings 15a, 15b, and 15c, and a reinforcing member 14 that connects the upper part of each pillar 13. As mainly shown in FIGS. 1 and 4, each support column 13 is box-shaped with a rectangular cross section, and a pallet 30 on which a car is mounted is placed between them. A slit 13a is formed over the entire length.
A vertical screw shaft 20 is supported within each support column 13 . The four brackets 31 protruding from both side edges of the pallet 30 enter the support 13 through the slits 13a, and as shown in FIG. 40 is screwed together with each screw shaft 20. Each nut 40 is rotated in conjunction with each other by a motor provided inside the pallet 30, as will be described later, so that the pallet 30 is moved up and down in a horizontal state. Slanted footboards 30a are attached to both front and rear ends of the pallet 30 for allowing a vehicle to enter and exit.

As shown in FIG. 1, a horizontal support plate 16 is horizontally fixed to the inside of the upper part of each support column 13 by welding or the like, and an upper hole 16a through which a screw shaft 20 can be inserted is formed in the center of the support plate 16. Further, on the upper surface of the base 11, a lower hole 11 is located directly below each upper hole 16a and has a considerably larger diameter than the lower end 20b of the screw shaft 20.
a are formed respectively. As shown in FIGS. 1 and 4, the center of a substantially square mounting plate 21 is inserted through the upper end 20a of the screw shaft 20, and the nut 2
It is fixed by 6. The screw shaft 20 is inserted into the upper hole 16a from above, the mounting plate 21 is brought into contact with the support plate 16 via a rubber cushion plate 22 having the same contour shape and a hole 22a in the center, and the lower end 20b is inserted into the upper hole 16a. It is located within the lower hole 11a. A collar 23 that is slightly longer than the total thickness of the two plates 21 and 22 is inserted into the mounting holes 21a and 22a provided at the same position at the four corners of the mounting plate 21 and cushion plate 22, and a large diameter washer 24 is inserted into the mounting holes 21a and 22a. bolt 2 through
5 is fixed to the support plate 16. As a result, the screw shaft 20 is attached to the support plate 16 via the mounting plate 21.
, the cushion plate 2 cannot rotate around the axis, and the cushion plate 2
Due to the deformation of No. 2, the upper end portion 20a is swingably supported within the range allowed by the gap between the lower end portion 20b and the lower hole 11a.

Next, the structure of the support portion of the pallet 30 will be explained mainly with reference to FIG. Four brackets 3 fixed so as to protrude from both side edges of the pallet 30
A nut 40 is attached to the tip of each pallet 1 through a shaft bearing so that it can rotate freely around the vertical axis, and each nut 40 is threadedly engaged with each threaded shaft 20 to support the pallet 30. There is. In this embodiment, a ball screw with a rolling ball interposed between the screw shaft 20 and the nut 40 is used, so that the frictional resistance when the pallet 30 is moved up and down can be reduced. A bevel gear 41 is coaxially fixed to the lower part of each nut 40, and a bevel gear 42 fixed to the tip of an interlocking shaft 43 horizontally supported on the pallet 30 via a bearing member 32 meshes with the bevel gear 41. There is. Each nut 4 provided on the four brackets 31
0 are interlocked and rotationally driven by a common motor (not shown) provided in the pallet 30 via similar bevel gears 41 and 42 and an interlocking shaft 43.

Next, the operation of the first embodiment will be explained.

When the motor is driven to rotate in the forward or reverse direction by an up or down switch (not shown), each nut 40 is interlocked and driven to rotate in the forward or reverse direction via the interlocking shaft 43 and bevel gears 42, 41. Screw shaft 2
0 to raise or lower the pallet 30 horizontally. The screw shaft 20 swings slightly around the upper end 20a as a fulcrum, and the threaded part with the nut 40 moves in the horizontal direction, thereby reducing the distance between the screw shaft 20 and the nut 40 due to manufacturing or assembly errors. error is absorbed. At this time, the rubber cushion plate 22 is deformed and some reaction force is generated between the threaded portion of the screw shaft 20 and the nut 40, but since the deformation of the cushion plate 22 is slight, the reaction force is also extremely small. Therefore, the frictional force between the screw shaft 20 and the nut 40 is small and does not fluctuate. Therefore, the load on the motor is reduced, there is no possibility of overheating or uneven operation, and the screw shaft 20
The friction between the nut 40 is also reduced. In addition, screw shaft 2
The error in the spacing between the threaded part of the screw shaft 20 and the nut 40 is relatively small because it is due to manufacturing errors, etc. Therefore, the gap between the lower end 20b of the screw shaft 20 and the lower hole 11a needs to be made that large. There isn't. Further, this gap may be closed by providing an elastic seal made of rubber or the like.

In the second embodiment shown in FIGS. 5 to 7,
The support structure of the upper end 20a of the screw shaft 20 is partially different from the first embodiment. That is, in FIG. 5, the support structure at the upper right portion is substantially the same as that in the first embodiment except that the gap between the mounting hole 21a of the mounting plate 21 and the collar 23 is made larger; The support structures at the three locations are completely different. The support structure at the lower left portion of FIG. 5 will be explained with reference to FIGS. 6 and 7. The upper end portion 20a of the screw shaft 20 has a pair of parallel flat portions 20c cut out on both sides. Like the support plate 16 of the embodiment, a long hole 17a is formed in the center of the support plate 17 fixed to the support column 13, which can fit into the flat part 20c and has a length larger than the diameter of the upper end part 20a. There is. Screw shaft 2
0, by inserting the upper end portion 20a into the elongated hole 17a from below and inserting the support pin 28 into the pin hole 20d, the support plate 17 is made to oscillate around the axis with the support pin 28 as the fulcrum. movable and long hole 1
It is supported so as to be able to move a certain distance in the major axis direction of 7a. As shown in FIG. 5, the elongated hole 17a at the lower left is long in the vertical direction, and the elongated hole 17a at the upper left and lower right
is getting longer in the left and right direction. As in the first embodiment, the lower end 20b of the screw shaft 20 is inserted into a considerably large diameter lower hole 11a formed in the upper surface of the base 11 with a gap therebetween.

In this second embodiment, the error in the spacing between the screw shafts 20 and the nuts 40 due to manufacturing errors and assembly errors is eliminated by using the fulcrum near the upper end 20a of each screw shaft 20 as in the first embodiment. Not only is it absorbed by the rocking, but also the movement of the upper end 20a in all directions due to the gap between the mounting hole 21a of the mounting plate 21 and the collar 23 (the upper right part in FIG. 5), and the movement of each upper end 20a in the direction of each elongated hole 17a. It is also absorbed by the movement of (the remaining three locations). Therefore, according to the second embodiment, when the pallet 30 is raised, the upper end portion 20a
The swing angle of the screw shaft 20 using the vicinity as a fulcrum can be reduced.

The number of screw shafts 21 is not limited to four as in the above embodiment, but can be any number as long as it is three or more, and one of each screw shaft 21 may be directly fixed to the fixed frame 10. good. Furthermore, the fixed frame 10 also includes one fixed column 13 for each screw shaft 21 as in the above embodiment.
Alternatively, a pair of side walls may be provided along both sides of the pallet 30.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the multilevel parking system according to the present invention, and FIG. 1 is a cross-sectional view of the main part (second embodiment).
FIG. 2 is a side view, FIG. 3 is a right front view of FIG. 2, and FIG. 4 is a plan view. Fifth
7 to 7 show the second embodiment, FIG. 5 is a plan view, FIG. 6 is an enlarged sectional view of FIG. 5, and FIG. 7 is a top view of FIG. 6. Explanation of symbols, 10... Fixed frame body, 20... Screw shaft, 20a... Upper end part, 20b... Lower end part, 30
...Palette, 40...Natsuto.

Claims (1)

[Scope of utility model registration request] At least three screw shafts are provided vertically on both sides of the fixed frame, a pallet is located between these screw shafts on which the vehicle is mounted, and the pallet can only be rotated around the vertical axis on both sides of the pallet. In the multi-story parking system, the multi-level parking system is provided with a plurality of nuts supported by the screw shafts and screwed into each of the screw shafts, and a motor that horizontally raises and lowers the pallet by rotationally driving the nuts in conjunction with each other, wherein the screw shafts are , an upper end of which is swingably supported by the fixed frame but not rotatable about an axis, and a lower end of which is movable laterally with respect to the fixed frame.