JPS6364579B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a two-stage multilevel parking system, and particularly to an improvement of a hydraulic cylinder device for driving an upper parking platform up and down.

Traditionally, in order to make effective use of vehicle parking space,
Various types of multilevel parking systems are available that park vehicles in two levels, upper and lower.The basic structure is a lower parking surface (formed either as a base or by placing an appropriate pallet) and an upper parking surface. An upper parking platform that forms a plane and can be raised and lowered, a vertical guide structure, such as a pillar structure, that guides the upper parking deck in raising and lowering while maintaining a substantially horizontal posture, and a drive mechanism that drives the upper parking deck up and down are provided in pairs on the left and right sides. What you have is normal.

The present invention mainly relates to improvements in the elevating drive mechanism.

That is, one of the elevating drive mechanisms of a conventionally known two-stage multilevel parking system will be explained with reference to FIG. 2. The cylinder body 31 and the piston rod, which slide relative to each other and increase their axial length by introducing hydraulic pressure transmission, are shown in FIG. A hydraulic cylinder device 30 equipped with 32,
One cylinder body 31 is fixed to a lower structure fixed to the base, and the other piston rod 32 is provided to slide upwardly into and out of the lower structure, and the upper end of this piston rod 32 is connected to the upper parking platform 33. A type of parking lot is known in which a push-up force by hydraulic pressure is applied perpendicularly to the upper parking platform 33.

In such a type, the direction of action of the pushing force of the hydraulic cylinder device 30 is vertically upward relative to the load of the vehicle placed on the upper parking platform 33, so the pushing up force is a combination of the vehicle weight and the upper parking platform. Although it has the advantage of being approximately equivalent to the added weight and has good output efficiency, it has the problem that the structure of the hydraulic cylinder device 30 and the like must have relatively high strength and rigidity.

This problem can be explained as follows, for example, in relation to the fact that the upper parking platform 33 and the connecting portion 34 that connects the upper parking platform 33 to the piston rod 32 are deviated in the height direction.

That is, as shown in FIG. 2, the piston rod 32 that moves up and down needs to form a connecting portion 34 with the upper parking platform 33 at its upper end position, as is clear from the illustration. Therefore, the vertical movement of the connecting portion 34 is limited to a certain height h ₁ from the base.
(Equivalent to the upper end position of a cylinder body that does not move)
This is carried out within the range given by the lower limit point being the position , and the upper limit point being the position at the height h ₂ that projects upwardly from the cylinder body 31 .

On the other hand, the movement of the upper parking platform 33 is at zero height (h ₀ ).
The vertical movement is performed from the base surface within the range of the constant height _h1 . In this way, the positions of both the connecting portion 34 and the upper parking platform 33 are shifted by a certain distance in the vertical direction. Therefore, the connecting portion 34 provided at the upper end of the piston rod 32 and the upper parking platform 33 are For example, it is necessary to connect them using a large inverted L-shaped rigid bracket 35, which results in an increase in weight, a complicated connection process, and an increase in the size of the device due to the addition of a bracket sliding guide. It is.

In addition, in the above type, due to the buckling phenomenon that must be taken into consideration in the structure of the hydraulic cylinder device, the column length l of the buckling load Pk = nπ ² EI/l ² must be designed based on the maximum h ₂ . , bending stiffness
There is also the problem that EI must be set relatively large. (In addition, in a hydraulic cylinder device used in a multilevel parking system, the outermost ends of the cylinder body and piston rod are usually supported as rotational fulcrums so that the linearity of both is always maintained. Therefore, the above-mentioned (The coefficient n in the formula for buckling liquid weight is usually n = 1.) Taking these various points into consideration, the present invention has developed a structure that is structurally simple and that also reduces the requirements for the strength and rigidity of the members. The present invention provides a hydraulic cylinder device suitable for a tiered multi-level parking system, and a particular feature of the present invention is that the lifting guide mechanism of the upper parking platform can be combined with this as a scissors type in which two intersecting legs open and close. Specifically, an integrally fixed structure includes a pair of parallel lower frame bodies fixed on a base and arranged along the left and right sides of a vehicle parking space; An upper parking platform is arranged parallel to the upper position of the lower fixed structure and includes a pair of left and right parallel upper frame bodies corresponding to the lower frame bodies, respectively, and is provided to connect the lower frame body and the upper frame body. and a pair of left and right hydraulic cylinder devices that are provided to connect the upper frame body and the lower frame body and push up the upper parking platform substantially vertically, the hydraulic cylinder device In the device, one cylinder body that relatively slides in and out is connected to the upper frame body so as to support the load at its lower end,
The other piston rod, which slides in and out relatively,
This is a two-tiered multi-level parking device, characterized in that its lower end is connected to the lower frame body, and its upper end side is configured to tightly slide into and out of the lower end opening of the cylinder body.

The best embodiments of the present invention will be described below based on the drawings, but the main characteristics of the present invention are not only in the case of an embodiment in combination with a modified scissor-type lifting guide mechanism, but also in combination with a known column-shaped lifting guide mechanism. It will be easily understood that when combined, the results can be obtained even when the hydraulic cylinder device is disposed not at the rearmost portion of the parking device but at an intermediate portion in the longitudinal direction, etc., without further explanation.

In the figure, 1 is a base, and 2 is a lower frame that forms a part of the lower fixing structure of the multi-story parking device, and is fixed in parallel along the left and right sides of the vehicle parking space. This lower fixing structure includes connecting members for connecting and reinforcing the left and right lower frame bodies 2 as necessary, stud bolts for fixing, etc., and pallets to be installed as necessary to form a lower parking platform. It consists of

Reference numeral 3 denotes an upper parking platform disposed above the lower fixed structure, which includes a pair of left and right upper frames 4 corresponding to the lower frame 2, and a connecting member for reinforcing and connecting the left and right upper frames 4. (not shown), a pallet (not shown) forming a vehicle parking surface, and a pair of front and rear wheel stops 5, 6 forming rear wheels of the parked vehicle.

Reference numeral 7 designates a pair of left and right scissor-shaped lifting guide mechanisms connected and interposed between the pair of upper and lower frames 4 and 2, which can be opened and closed via a central shaft 8 at the center of the intersection. The two legs 9 and 10 are
The end portions located on the rear side are rotatably connected to the trailing portions of the upper frame body 4 or the lower frame body 2, respectively. 1
1 and 12 are pivot connection pins, respectively. Also, the above 2
End sides located on the front and rear sides of the legs 9 and 10 are pivotally connected to the upper frame body 4 or the lower frame body 2 near the intermediate portion of the parking device in the front-rear direction so as to be rotatable and slidable in the front-rear direction. Reference numerals 13 and 14 designate pivot connection pins, and 15 and 16 designate guide rails that guide the pivot connection pins 13 and 14 so as to be slidable in the front and rear directions relative to the upper and lower frames 4 and 2, respectively.

In this example, the elevating guide mechanism 7 is provided in a scissor shape, and the position of the pivot connecting pin 13 attached to the guide rail 15 of the upper frame body 4 is the same as that of the two legs 9,
10 other three pivot connection pins 11, 12, 14
The upper parking platform 3 is located slightly below the other apex position of the geometrical rectangular shape that includes three apexes on the diagonal extension line, and this causes the upper parking platform 3 to move toward the front side when the mechanism guides the upper parking lot 3 up and down. It is characterized by a slight tilting (oscillation) of the surface.
That is, at the highest point, it slopes slightly upward in the front, as shown in the figure, and at the lowest point, it slopes slightly downward in the front.

Such a configuration not only has the advantage that rainwater etc. on the upper parking platform 3 can be drained from the rear, but also has the advantage that the hydraulic cylinder described below is required to obtain the required space (mainly the vertical spacing of the space) for lower parking. This has the advantage that the required stroke of the device can be reduced compared to a parallel lifting type, in other words the length of the piston rod can be reduced.

Reference numeral 17 indicates a pair of left and right hydraulic cylinder devices which are a feature of the present invention, and a cylinder body 18 has a bracket 1 at its lower end having an opening opening downward.
9. It is pivotally connected to the upper frame body 4 via a pin 20 at the rear end to support the vehicle load, and the closed side extends upward. A piston rod 21, which is slidably inserted into the lower end opening of the cylinder body 18 and relatively slid in and out, is pivotally connected to the rearmost portion of the lower frame body 2 via a pin 22 at its lower end.

When the upper parking platform 3 shown in the figure is located at the highest point, pressure oil is sufficiently transmitted into the cylinder body 18, and by gradually removing the oil from this state, the cylinder body 18 is moved to the piston rod 2.
1 and lowers downward in the insertion direction relative to the upper parking platform 3 by the scissor-type lifting guide mechanism 7.
descends while gradually lowering its front part until it reaches its lowest point.

On the other hand, when hydraulic pressure is transmitted into the cylinder body 18 from a hydraulic pressure supply source (not shown) from the lowest position, the cylinder body 18 moves upwardly and moves to the state shown in the figure, with respect to the piston rod 21 which does not move up and down. It turns out.

Incidentally, reference numerals 23 and 24 in the figure are parked vehicles, and it is a matter of course that a lock mechanism for mechanically ensuring that the upper parking platform 3 stops at the highest point may be provided as appropriate.

Although not shown in the figure, the cylinder body 18
For example, in view of the fact that the cylinder body 18 is movable, the hydraulic piping to the cylinder body 18 may be connected using a flexible tube. Preferably, a hydraulic pressure is transmitted through the flow path. That is, with such a configuration, the piping can be substantially fixed, and the bending stiffness of the piston rod 21 against buckling does not decrease much even with a hollow shaft compared to a solid piston rod. This is because there is no disadvantage due to the formation of the flow path.

According to the above configuration, the weight of the vehicle 24 acts as a compressive load only on the piston rod 21, and its column length is about half that of the conventional example described above (in this example, (This is further reduced due to the use of a modified scissor-type lifting guide mechanism.) As is clear from the equation for the buckling load mentioned above, assuming that the same member is used for the piston rod, compared to the conventional cylinder Although it depends on the wall thickness of the body, it can withstand a load about 2 to 3 times as large.In other words, it is possible to use a piston rod with a small diameter.According to the knowledge of the present inventor, It has been confirmed that this piston rod can be constructed using small-diameter steel pipes, which is extremely effective in practice.

According to this embodiment, there is no fixed columnar structure and the structure is extremely simple, so it has the advantage that it can be folded and stacked in large numbers and transported to the site. Due to the combination, the only thing that protrudes upward when the upper parking platform is lowered is the cylinder body at the rearmost part. However, the installation position of the hydraulic cylinder device of the present invention is not necessarily limited to that of the embodiment, and it may be installed in the middle part of the parking device in the longitudinal direction. It goes without saying that the desired effects can be achieved, and that the lifting guide mechanism is not limited to the scissor-type mechanism.

[Brief explanation of drawings]

Figure 1 is a side view showing an embodiment of a two-tiered multilevel parking system according to the present invention, and Figure 2 illustrates the configuration of a hydraulic cylinder device used in a conventional two-tiered multilevel parking system. FIG. DESCRIPTION OF SYMBOLS 1... Base, 2... Lower frame body, 3... Upper parking platform, 4... Upper frame body, 5, 6... Car stop, 7... Lifting guide mechanism, 8... Center axis, 9, 10... ...legs, 1
1, 12, 13, 14... pin, 15, 16...
Guide rail, 17...Hydraulic cylinder device, 18
...Cylinder body, 19...Bracket, 2
0, 22...Pin, 21...Piston rod, 2
3,24...vehicle.

Claims (1)

[Scope of Claims] 1. A lower fixing structure including a pair of parallel lower frame bodies fixed on a base and arranged along the left and right sides of the vehicle parking space, and a lower fixing structure including a pair of parallel lower frame bodies fixed on a base, and an upper parking platform including a pair of left and right parallel upper frame bodies disposed as shown in FIG. The parking lot includes an elevating guide mechanism and a pair of left and right hydraulic cylinder devices that are provided to connect the upper frame body and the lower frame body and push up the upper parking platform substantially vertically, and the hydraulic cylinder devices relatively slide in and out. One cylinder body is connected to the upper frame body at its lower end so as to support the load, and the other piston rod, which relatively slides in and out, is connected to the lower frame body at its lower end, and its upper end side is connected to the upper frame body so as to support the load. A two-stage multi-level parking device characterized by being configured to be inserted into and out of a lower end opening of a body by tightly sliding it into the opening. 2. The two-stage multilevel parking system according to claim 1, wherein the elevating guide mechanism is of a scissor type that guides the upper parking platform in elevating and lowering by opening and closing movements of two intersecting legs. 3. The two-stage multilevel parking system according to claim 2, wherein the hydraulic cylinder device is connected to the rearmost positions of the upper and lower frames. 4. The hydraulic pressure transmission path to the cylinder body of the hydraulic cylinder device is formed through a vertical hole in the axial center of the piston rod, as described in any one of claims 1 to 3. Two-tier multilevel parking system.