JPH0129948B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an improvement of a multilevel parking system, in particular, for a pit excavated from the ground surface, pallets forming a vehicle parking surface are vertically separated into two (or three) upper and lower stages. The present invention relates to an improvement of a multi-story parking device in which a frame supported by a frame is driven up and down.

In general, this type of multilevel parking system consists of pallets (plate-like structures that form the vehicle parking surface) that are spaced apart in the upper and lower directions so as to form multiple stages, with predetermined spacing and positional relationships in the vertical direction. It is usually formed by rigidly connecting and fixing with a frame, and one constituent block formed in this way can be driven up and down in the vertical direction with respect to a pit excavated from the ground surface. It is known as having the feature that by making any stepped section stand still at the same height as the ground surface, vehicles can enter and exit regardless of whether or not vehicles are parked on other stepped sections. There is.

In addition, in such a multilevel parking system, for example, only the upper pallet is fixed to the frame, and the lower pallet is suspended from the upper pallet by a chain or the like, and after the lower pallet has landed on the bottom of the pit, the upper pallet is further fixed to the frame. By adopting a method in which the pits are lowered, the required depth of pit excavation can be reduced, or by tilting the front side of the upper pallet (the side where vehicles enter and exit), the upper and lower pallets can be moved up and down. The pit excavation depth was also made shallower by making the interval partially variable.
It has been proposed in Publication No. 56-143344, etc.

By the way, the device for lifting and lowering the frame supporting each stage of pallets in this type of multi-story parking system has a vertical structure between the frame and the bottom of the pit as a driving device for lifting and lowering the frame. It consists of a hydraulic cylinder device installed in a vertical position and a lifting guide mechanism consisting of a link mechanism etc. that guides the lifting and lowering of the frame. Usually, the piston rod is provided so as to slide upward and gradually come out of the cylinder body, and the frame is connected to the upper end of the piston rod.

However, such a hydraulic cylinder device has the following problems. That is, the advantage of the above type is that by making the direction of the pushing force approximately perpendicular to the load (the weight of the frame, pallet, and vehicle), it is possible to perform a lifting drive with good output efficiency. However, the hydraulic cylinder device changes from a state in which the frame is recessed in the pit (the position of the upper pallet matches the height of the ground level) to a state in which the frame protrudes above the ground (the position of the lower pallet matches the height of the ground level). Since it is necessary to raise and lower the frame within a range where the piston rod is aligned with the height of the ground surface, the connection position of the upper end of the piston rod to the frame is necessarily on the upper edge side of the frame, and The problem is that the structural strength and rigidity must be increased, as can be understood by considering the situation when the hydraulic cylinder device protrudes above the ground at its maximum extension.

This problem is caused by the fact that the upper end of the piston rod must be connected to the frame at the upper edge of the frame.

In other words, since the piston rod of the hydraulic cylinder device slides in and out of the cylinder body which is fixed (or pivoted) to the bottom of the pit, the lowest position of its upper end is up to the upper end of the body.
This is because it is naturally impossible to connect to the lower edge side of the frame that descends to the bottom of the pit.
Therefore, regarding the buckling phenomenon that must be especially considered in the structure of hydraulic cylinder devices, the bending stiffness determined from the relationship of buckling load Pk = nπ ² EI/l ²
The size of EI had to be designed according to the maximum length of the hydraulic cylinder device (cylinder body length + piston rod length).

From this point of view, the present invention provides a hydraulic cylinder device in which the conditions regarding the strength and rigidity of the members are reduced in the above-mentioned multilevel parking system. This is particularly effective when used in combination with the lifting guide mechanism.

The gist of the present invention is to provide a frame that supports pallets in at least two tiers of upper and lower tiers, which are spaced apart in the upper and lower directions, so as to be movable up and down with respect to the excavation pit. The pallets of the stepped portions are configured to be able to move to positions that substantially match the height of the ground surface, and the vertical movement of the frame is controlled by a guide mechanism that guides the vertical movement, and a guide mechanism between the frame and the bottom of the pit. In the multi-story parking system configured to be operated by a hydraulic cylinder device that is provided and drives the frame up and down, the hydraulic cylinder device moves in and out of the pair of members that constitute the hydraulic cylinder device by sliding in and out relative to each other. One cylinder body is fixed at its lower end to the lower edge of the frame with its opening facing downward, and the other member, the piston rod, which slides in and out, has its lower end fixed to the bottom of the pit and its upper end fixed to the lower edge of the frame. A three-dimensional parking structure configured to be slidably fitted into an opening of a cylinder body, and further comprising a vertical hole provided along the axis of the piston rod to form a hydraulic pressure transmission path to the hydraulic chamber in the cylinder body. It's in the device.

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 limited to embodiments in which the invention is combined with a modified scissor type elevating guide mechanism, as well as known e.g. columnar elevating guide mechanisms. It will be easily understood without further explanation that when combined with the mechanism, the hydraulic cylinder device can be obtained even if the hydraulic cylinder device is arranged not at the rear end of the parking device but at an intermediate portion in the longitudinal direction.

Example 1 In FIGS. 1 and 2, 1 is the ground surface, 2 is an excavated pit, and 3 is the bottom of the pit.

Reference numeral 4 denotes a base structure fixed to the bottom bottom 3 of the pit, and includes a pair of steel materials, etc., which are placed and fixed on the pallet to be described later, extending approximately to the left and right positions of vehicles entering and exiting the pallet.
It is formed by connecting by reinforcing material.

Reference numeral 5 denotes a frame for supporting the upper and lower pallets 10 and 11. In order to support the lower pallet 10, a pair of frame members extending on both left and right sides of the vehicle are connected and fixed by appropriate reinforcing materials. a lower frame part 6, a vertical frame part 7 erected at the rear of the lower frame part 6 (on the left side in the figure), and an upper frame part 8 provided in the same manner as the lower frame part 6. The upper frame portion 8
is connected to the upper end of the vertical frame part 7, and is also connected to the upper end of the rod-shaped support connecting member 9 installed between the lower frame part 6 and the lower frame part 6 on the front side thereof, so that it always maintains a constant position with the lower frame part 6. The structure is integrated to maintain vertical spacing.

And upper pallet 11 and lower pallet 1
0 are supported by being placed on the upper frame portion 8 and the lower frame portion 6, respectively.

The frame 5 having such a structure can be moved up and down the pit 2 while maintaining a horizontal state by means of a scissor-type elevating guide mechanism connected and interposed between the frame 5 and the lower base 4.
It is installed so that it can be raised and lowered.

This scissor-type lifting guide mechanism is arranged in pairs on both the left and right sides of the vehicle, and is located on the central axis 1 at the intersection center.
2 legs 13 and 14 combined so that they can be opened and closed
is pivotally connected to the lower base 4 or the lower frame part 6 at the front end (right end in the figure) of each pit, and attached to the lower base 4 or the lower frame frame at the rear end (left end in the figure). A sliding mechanism 15 is provided in the frame portion 6,
16.

The sliding mechanisms 15 and 16 are composed of a combination of guide rails and rollers, and have a structure that allows the ends of each leg to move back and forth in response to opening and closing of the two legs 13 and 14.

Reference numeral 17 indicates a hydraulic cylinder device which is a characteristic part of this embodiment, and this is arranged in a pair on the left and right sides similarly to the scissor-type elevating guide mechanism, and is also arranged at the rearmost position of the frame 5. The cylinder body 18 of the hydraulic cylinder device has its lower end (that is, the vicinity of the opening) with the opening facing downward, the lower edge of the frame 5, or the lower edge of the vertical frame 7 in this embodiment. It is pivotally fixed by a shaft 21 via a bracket 20, and the upper end is closed. A piston rod 19 that slides in and out of the cylinder body 18 is pivotally fixed to the lower base 4 at its lower end by a shaft 22.
The upper end side is provided so as to be slid into and out of the opening of the cylinder body in a tightly fitted state.

According to such a configuration, when the frame 5 is located at the highest point position as shown in FIG.
Pressure oil is sufficiently transmitted into the cylinder body 18, and by gradually removing the oil from this state, the cylinder body 18 descends downward in a direction in which it fits relatively into the piston rod 19, and the scissor-type lifting guide mechanism The frame 5 gradually descends to the lowest point while maintaining a horizontal state.

On the other hand, when hydraulic pressure is transmitted from the lowest point state to the cylinder body 18 from a hydraulic pressure source (not shown), the cylinder body 18 moves upward while being pulled out from the piston rod 19, and moves to the state shown in the drawings. It goes without saying that a locking mechanism for mechanically ensuring that the frame 5 stops at its 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.
Suitably, hydraulic pressure is transmitted via the flow path. That is, according to such a configuration, the piping can be made substantially fixed, and in this case, the bending rigidity against buckling of the piston rod 19 is also much lower even with a hollow shaft than in the case of a solid piston rod. Since it does not decrease, it is considered that there is almost no disadvantage due to the formation of the flow path.

According to the above configuration, the weight of the vehicle acts as a compressive load only on the piston rod 19, and the length of this rod is about half that of the conventional example described above. As is clear from the equation for the buckling load mentioned above, if we assume that the same material is used for the piston rod, it will be able to withstand a load that is about 2 to 3 times as large as the conventional cylinder body, depending on its wall thickness. can. In other words, it is also possible to use a piston rod with a small diameter. Furthermore, a particularly excellent advantage of the present invention is that commercially available steel pipes can be used for the hollow shaft as described above, which is extremely beneficial in terms of cost reduction and the use of general-purpose materials. is obtained. Note that the present invention is not limited to the case where the hydraulic cylinder device is disposed at the rearmost part of the frame, but it is natural that it may be disposed at an intermediate position between the front and back of the frame. Similarly, the advantage is obtained that the length of the column subjected to the compressive load can be considered substantially as the length of the piston rod. Furthermore, the lifting and lowering guide mechanism of the frame is not limited to the scissor type mentioned above, but may also be one in which rollers on the frame side are guided and engaged with a pillar structure fixed on the pit side. good.

Embodiment 2 In FIGS. 3 and 4, the upper frame part of the frame frame is always kept at a constant distance from the lower frame part by utilizing the feature that the two intersecting legs of the scissor-type guide mechanism perform opening and closing movements. Rather than maintaining a relationship that maintains the same, the frame is constructed so that it tilts slightly to the front side as the entire frame moves up and down, thereby reducing the amount of pit excavation and reducing the axial length of the hydraulic cylinder device. This figure shows a more desirable embodiment of the present invention in which the length of the column on which the column compressive load acts can be further shortened.

The reduction in the amount of pit excavation by tilting the upper frame portion (ie, the upper pallet) is based on the following points.

In other words, when a vehicle enters or exits from the lower pallet (see Figure 3), the gap between the upper and lower pallets must have a predetermined height in order for passengers to enter and exit the upper and lower pallets. This height is a minimum of 1800 mm on the front side for this type of multi-storey parking system.
It is specified that mm should also be used.

However, when the frame is recessed into the pit (see Figure 4), that is, when a vehicle enters or exits the upper pallet, the space above the lower pallet must be narrow as long as it does not damage the parked vehicle (1600 mm or more is sufficient). ), there is no problem, and if you do it this way, you will have the advantage of being able to make the pit excavation shallower.

That is, with the above configuration, the movable stroke length of the cylinder body of the hydraulic cylinder device shown in the first embodiment can be further shortened, so that the height of the column that receives the load of the hydraulic cylinder device, which is one of the characteristic configurations of the present invention, is shortened. This effect is especially remarkable in this embodiment.

The scissor-type lifting and lowering guide mechanism functions extremely effectively in order to cause the upper frame to tilt in this manner.

This will be explained below, as shown in Figures 3 and 4.
Embodiment 2 shown in the figure is almost the same as Embodiment 1, except that the structure of the elevating guide mechanism and frame is slightly different.
100 has been added and the explanation has been limited to the necessary range.

The structural features of the second embodiment are that the end supports of the two legs 113 and 114 of the scissor-type lifting guide mechanism are opposite to those of the first embodiment, and that the upper and lower frame portions 106 and 108 are , the rod-shaped support connecting member 109 connected on the front side is combined with the scissor type lifting guide mechanism.

That is, the two legs 113 and 114 of the guide mechanism are
The rear ends are pivotally connected to the lower frame part 106 or the base 104, and the front ends are connected to the lower frame part 106 or the base 104 via sliding mechanisms 115, 116, respectively. The rod-shaped support connecting member 109 has an upper end pivotally attached to the upper frame part 108 and a lower end to the one leg 1.
It is connected to an extending end extending from the connecting portion with the sliding mechanism 115 of 14.

In this way, as can be understood from the illustrations in FIGS. 3 and 4, the rod-shaped support connecting member 109
The lower end support point is displaced up and down and back and forth with respect to the lower frame part 106 according to the opening and closing operations of the two legs 113 and 114 forming a scissor-type lifting guide mechanism, and this displacement is caused by the front side of the upper frame part 108. This causes a movement of tilting the lower frame portion 106 with respect to the lower frame portion 106.

Therefore, in this case, the pit excavation can be made shallower by, for example, 200 mm than in Embodiment 1, and the overall length of the hydraulic cylinder device 117 can be shortened accordingly, so that the strength and rigidity are further improved. It will be advantageous.

As shown in the drawings explaining each of the above embodiments, the front end portion of the upper pallet supported by the upper frame is inclined slightly forward and downward from the vehicle mounting surface (as shown in the drawings). 11a, 111a), the purpose of this is to allow vehicles to enter and exit the upper pallet smoothly, but this configuration also applies to the tilting type of upper frame (Example 2). This has the advantage of contributing to a reduction in the amount of pit excavation. In other words, considering the dimensions L and l shown in Fig. 3, it is not L but l that should be used as the standard for the entry and exit of people. , the vehicle mounting surface is placed on the ground surface 1 in the state shown in Figure 4.
This means that it can be made slightly higher than 01, which is effective in reducing the amount of pit excavation.

As described above, the multilevel parking device of the present invention is
This type of device, equipped with a hydraulic cylinder device of a suitable structure, provides extremely effective benefits, and its usefulness is great.

[Brief explanation of drawings]

The drawings show an embodiment of the multilevel parking device of the present invention, and FIG. 1 is a diagram showing the device according to the first embodiment when the device is moved upward, FIG. 2 is a diagram showing the device when it is moving downward, and FIG. FIG. 4 is a diagram showing the apparatus according to the second embodiment when it is moving upward, and FIG. 4 is a diagram showing the apparatus when it is moving downward. 1,101...Ground surface, 2,102...Pit, 3,103...Pit bottom, 4,104...
Base structure (foundation), 5,105...Frame frame,
6,106...Lower frame part, 7,107...Vertical frame part,
8,108...Upper frame portion, 9,109...Bar-shaped support connection material, 10,110...Lower pallet, 11,
111... Upper pallet, 12, 112... Central axis, 13, 14, 113, 114... Leg, 15,
16, 115, 116...Sliding mechanism, 17, 11
7...Hydraulic cylinder device, 18,118...Cylinder body, 19,119...Piston rod,
20,120...Bracket, 21,121...
Axis, 22,122...Axis.

Claims (1)

[Scope of Claims] 1. A frame that supports the pallets of each stage forming at least two upper and lower vehicle parking surfaces, spaced apart in the upper and lower directions, is provided so as to be movable up and down with respect to the excavation pit. The pallets are configured such that they can each be moved to a position substantially matching the height of the ground surface, and the vertical movement of the frame is controlled by a guide mechanism provided between the frame and the lower bottom of the pit. In the multi-level parking system configured to use a hydraulic cylinder device that moves the frame up and down by moving the frame, the hydraulic cylinder device moves one of the pair of members constituting the hydraulic cylinder device by relatively sliding in and out. The cylinder body is fixed at its lower end to the lower edge of the frame with its opening facing downward, and the piston rod, which is the other member that slides in and out, has its lower end fixed to the bottom of the pit and its upper end fixed to the lower edge of the cylinder body. A three-dimensional parking system, characterized in that the piston rod is slidably fitted into an opening of the piston rod, and a hydraulic pressure transmission path to the hydraulic pressure chamber in the cylinder body is formed by a vertical hole provided along the axis of the piston rod. 2. The guide mechanism for the frame is of a scissor type, which is disposed between the lower edge of the frame and the bottom of the pit, and guides the rise and fall of the frame by opening and closing movements of two intersecting legs. A multilevel parking device according to claim 1. 3. Claims 1 or 2, characterized in that the hydraulic cylinder devices are arranged in pairs on the left and right at rear positions on the opposite side from the front part where the vehicle enters and leaves each stage pallet. Multilevel parking device described in section.