JP2013011127A - Double multistage type parking system and operation method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double multistage type parking system in which, when a vehicle enters/leaves a garage with an entering/leaving height (FL), an entering/leaving space and a human passage space can be kept wide without being disturbed by chains or the like, and an operation method thereof.SOLUTION: A double multistage type parking system comprises: a pallet 12 which can be moved vertically while placing a vehicle 1 thereon between the entering/leaving height (FL) in which the vehicle 1 enters/leaves a garage and a parking space higher than the entering/leaving height (FL); a supporting device 20 which is capable of supporting the pallet 12; a supporting device 20 which is hung down at a lower end 17a of a string-like body 17 (chain or wire); and a vertically driving device 16 which is vertically movable. (A) In the state where the pallet 12 is supported by the supporting device 20, the supporting device 20 is vertically moved to vertically move the pallet 12 between the entering/leaving height (FL) and the parking space. (B) In the case of entering/leaving where the pallet 12 is positioned in the entering/leaving height (FL), the pallet 12 is released by the supporting device 20 and the supporting device 20 and the string-like body 17 are moved up to such a height as not to disturb entering/leaving and human passage by the vertically driving device 16.

Description

  The present invention relates to a two-stage parking apparatus and a driving method thereof.

The two-stage parking device is a mechanical parking device in which two or more parking spaces are provided in the same installation space.
Two-stage parking devices can be broadly classified into a ground type in which parking spaces are provided only on the ground and a pit type in which parking spaces are provided on the ground and underground. In both the ground type and the pit type, the entry / exit of the vehicle is performed by directly entering or leaving the vehicle on the pallet located at the entry / exit height (FL).

  The two-stage parking apparatus described above is disclosed in, for example, Patent Documents 1 to 4.

Japanese Patent Application Laid-Open No. 2001-115684, “Two-stage parking device and transverse guide device for multi-stage parking device” JP 2003-97074 A, “Multistage parking device” JP 2003-105997 A, “Multistage parking device” Japanese Patent Application Laid-Open No. 2009-256978, “Two-stage parking device remodeling method and two-stage parking device modified by this method”

In a two-stage parking apparatus, a pallet that moves up and down is normally suspended by four chains (pallet suspension chains) in consideration of load balance.
However, when the pallet is lowered to the loading / unloading height (FL), the pallet hanging chain is in the vicinity of the side surface of the vehicle, so that the vehicle enters the pallet, the vehicle leaves the pallet, or the traffic of people There was a problem that the pallet hanging chain got in the way.

  The present invention has been made to solve such problems. That is, an object of the present invention is a two-stage type in which a chain or the like is not obstructed when a vehicle is loaded and unloaded at a loading and unloading height (FL), and a large loading and unloading space and a person passage space can be taken. It is in providing a parking apparatus and its driving method.

According to the present invention, a two-stage parking apparatus in which two or more parking spaces are provided in the same installation space,
A pallet that can be moved up and down by placing the vehicle between the loading and unloading height at which the vehicle enters and leaves and the parking space above it,
A support device capable of supporting the pallet at a position not interfering with the vehicle;
An elevating drive device capable of hanging the support device at the lower end of a flexible string-like body at a position where it does not interfere with the vehicle, and raising and lowering the lower end of the string-like body,
(A) In a state where the pallet is supported by the support device, the support device is raised and lowered, and the pallet is raised and lowered between the storage height and the parking space above it.
(B) At the time of loading / unloading at which the pallet is positioned at the loading / unloading height, the pallet is separated from the supporting device, and the supporting device and the string-like body are loaded / unloaded by the lifting / lowering driving device and do not disturb the passage of people. A two-stage parking device is provided, which is characterized by being raised up to a height.

Moreover, according to the present invention, there is provided a driving method for a two-stage parking device in which two or more parking spaces are provided in the same installation space,
A pallet that can be moved up and down by placing the vehicle between the loading and unloading height at which the vehicle enters and leaves and the parking space above it,
A support device capable of supporting the pallet at a position not interfering with the vehicle;
An elevating drive device capable of hanging the support device at the lower end of a flexible string-like body at a position where it does not interfere with the vehicle, and raising and lowering the lower end of the string-like body,
(A) In a state where the pallet is supported by the support device, the support device is raised and lowered, and the pallet is raised and lowered between the storage height and the parking space above it.
(B) At the time of loading / unloading at which the pallet is positioned at the loading / unloading height, the pallet is separated from the supporting device, and the supporting device and the string-like body are loaded / unloaded by the lifting / lowering driving device and do not disturb the passage of people. A driving method for a two-multistage parking apparatus is provided.

  According to the present invention, the support device that can support the pallet at a position that does not interfere with the vehicle, and the support device is suspended from the lower end of a flexible string-like body (for example, a chain). (A) In the state where the pallet is supported by the support device, the support device is lifted and lowered so that the pallet is placed in and out and the parking space above it. Can be moved up and down.

(B) When the pallet is placed at the loading / unloading height, the pallet is separated from the support device and the pallet remains at the loading / unloading height, and the lifting device drives the support device and the string. When the vehicle is loaded and unloaded at the loading / unloading height (FL), the string-like body (chain, etc.) does not get in and out of the vehicle by raising the shape to a height that does not obstruct loading / unloading and human traffic. Space and a person's passage space can be taken widely.

It is a front view of the two multistage parking apparatus by this invention. It is a right view of FIG. It is a perspective view of a support device, a pallet, and a raising / lowering guide. It is the elements on larger scale of the support apparatus in FIG. It is a perspective view of a support apparatus and a pallet when an engaging part is provided in the pallet. It is operation | movement explanatory drawing of the two multistage parking apparatus by this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the common part in each figure, and the overlapping description is abbreviate | omitted.

FIG. 1 is a front view of a two-stage parking apparatus according to the present invention, and FIG. 2 is a right side view of FIG.
In this example, the two-stage parking apparatus 10 is a three-stage up-and-down traverse system in which three-stage (1F, 2F, 3F) parking spaces are provided in the same installation space.

In this example, two pallets 12a located on the first floor among the three stages can traverse horizontally, and the two pallets 12b located on the second floor can traverse and move up and down, and the three pallets located on the third floor. 12c can be moved up and down only.
Therefore, in this example, the number of vehicles 1 accommodated is 3 × 3−2 = 7.
Hereinafter, when the pallets 12a to 12c are not particularly distinguished, they are simply referred to as a pallet 12.

In addition, this invention is not limited to the two multistage parking apparatus mentioned above, The other two multistage parking apparatus may be sufficient.
For example, the number of parking spaces may be four or more as long as it is two or more. Further, the number of units accommodated in the same stage is not limited to three, and may be two or four or more.
Hereinafter, the present invention will be described with reference to FIGS. 1 and 2.

  The loading / unloading height (FL) at which the vehicle 1 is loaded / unloaded is three in this example, and has three loading / unloading sections A, B, and C. All the widths of the pallets 12 (pallets 12a to 12c) are the same, and the loading / unloading sections A, B, and C are positioned adjacent to each other with a necessary gap (for example, 40 mm or less) between the three pallets 12. It has become.

  The two pallets 12a located on the first floor have wheels 13a at both ends in the length direction, and horizontally traverse along two horizontal rails 14a provided on the first floor by a horizontal driving device (not shown). In any one of the parts A, B, and C, the vehicle 1 is directly loaded and unloaded. Hereinafter, warehousing and warehousing means warehousing and warehousing.

  The two pallets 12b located at 2F have wheels 13b at both ends in the length direction of the rectangular frame 15 that lifts the pallet 12b, and a horizontal driving device (not shown) along two horizontal rails 14b provided at 2F. The vehicle 1 is traversed horizontally, and the vehicle 1 is directly loaded and unloaded at any of the loading / unloading sections A, B, and C.

The two-stage parking device 10 of the present invention has a pallet 12 that can be moved up and down by placing the vehicle 1 between a loading / unloading height (FL) at which the vehicle 1 is loaded / unloaded and a parking space above the loading / unloading height. Have
The pallet 12 that can be moved up and down corresponds to the two pallets 12b located at 2F and the three pallets 12c located at 3F.

  The two-multistage parking apparatus 10 of the present invention further includes an elevating drive device 16 and a support device 20.

The elevating drive device 16 includes a flexible string-like body 17 that extends vertically at a position that does not interfere with the vehicle 1, and a suspension drive apparatus 18 that winds or unwinds the string-like body 17 and moves the lower end 17 a up and down. Have
In this example, the string-like body 17 is a chain (or wire), and the suspension driving device 18 is a chain driving device (or winch).

  The lower end 17a of the string-like body 17 is fixed to the support device 20, and the intermediate portion reaches the suspension driving device 18 via a sprocket (or pulley). When the suspension driving device 18 is a chain driving device, a counter balance (not shown) is provided at the other end of the string-like body 17, and the sprocket that meshes with the chain is driven to rotate by the chain driving device. When the suspension driving device 18 is a winch, the other end of the string-like body 17 is wound around the drum of the winch, and the drum is driven to rotate.

The suspension drive device 18 for 2F is fixed to the rectangular frame 15 and traverses horizontally together with the rectangular frame 15.
The suspension driving device 18 for 3F is fixed to the main body frame 2, and three support devices 20 (support edges 22 described later) are lifted and lowered independently from the main body frame 2.

In this example, the lower ends 17a of the four string-like bodies 17 (chains or wires) are fixed at a total of four locations before and after the support device 20 (support edge 22) in consideration of load balance, and the suspension drive device 18, the support device 20 (support edge 22) is moved up and down while being held horizontally.
Further, in order to prevent the support device 20 suspended by the four string-like bodies 17 from swinging or swinging, an elevating guide 23 is provided in a portion that does not hinder the entry and exit of the vehicle. The raising / lowering guide 23 releases the support device 20 when the rectangular frame 15 traverses. That is, the lifting guide 23 at the height of the support device 20 when the rectangular frame 15 is traversed is interrupted, and can travel without interfering with the lifting guide 23.

FIG. 3 is a perspective view of the support device 20, the pallet 12, and the lifting guide 23. 3A is a perspective view of the support device 20 with the support fork 26 protruding to the support position C, and FIG. 3B is a support with the support fork 26 retracted to the retracted position O. FIG. 2 is a perspective view of the device 20. FIG. FIG. 3C is a perspective view of the support device 20 and the pallet 12 in a state where the pallet 12 is supported by the support device 20.
4 is a partially enlarged view of the support device 20 in FIG. 4A shows a state in which the support fork 26 protrudes to the support position C, and FIG. 4B shows a state in which the support fork 26 protrudes to the retracted position O.
FIG. 5 is a perspective view of the support device 20 and the pallet 12 when the pallet 12 includes the engaging portion 30. 5A, the engaging portion 30 is a hole or depression 30a, and in FIG. 5B, the engaging portion 30 is a protrusion 30b. In FIG. 5C, the engaging portion 30 is a protrusion 30 b, and a support fork 26 is installed on the lower surface of the support edge 22.

The support device 20 is configured to be able to support the pallet 12 (the pallet 12b and the pallet 12c) that can be moved up and down at a position that does not interfere with the vehicle 1.
In this example, the support device 20 has a support edge 22 and a support fork 26.

In this example, the support edge 22 has two support arms 22a that extend in parallel with the length direction of the pallet 12 without interfering with the vehicle 1, and a connecting arm 22b that connects the two support arms 22a. It is a letter-shaped or rectangular ring-shaped member.
The distance between the two support arms 22a is larger than the width of the pallet 12 (the pallet 12b and the pallet 12c) that can be raised and lowered.
Further, the connecting arm 22 b is engaged with the lifting guide 23 to guide the lifting and lowering of the support edge 22.
The connecting arm 22b is preferably installed at a height that does not contact the horizontal rail 14a when the support device 20 releases the pallet 12 at the loading / unloading height (FL).

The support forks 26 include a tip fork 26a, an intermediate fork 26b, and a base fork 26c, and two fork (four in total) are installed on the support arm 22a of the support edge 22. The support fork 26 projects horizontally from the support edge 22 to the inside of the pallet 12 in the width direction, and supports the both ends of the pallet 12 in the width direction (hereinafter simply referred to as both ends in the width direction). The fork drive device 24 drives horizontally between the “retreat position O” retracted to the outer side in the width direction.
That is, the support forks 26 are stacked in the order of the proximal fork 26c, the intermediate fork 26b, and the front fork 26a from the side closer to the support arm 22a. When the pallet 12 is supported, each fork 26a, 26b, 26c is wide. Slide horizontally inward. Thereby, the tip fork 26a is caught on the lower surface of the pallet 12 and supports the pallet 12. Then, the support device 20 is raised and lowered by the suspension drive device 18 in a state where the tip fork 26 a supports the pallet 12.
When the support device 20 releases the pallet 12, the support fork 26 is retracted to the retracted position O with the pallet 12 being placed at the loading / unloading height. As a result, the support fork 26 of the support device 20 does not contact the pallet 12 and releases the pallet 12.
3 and 4 is installed on the upper surface of the support edge 22, but may be installed on the lower surface of the support edge 22 as shown in FIG.

  The fork drive device 24 includes a plurality of sprockets 21a, 21b, 21c, and 21d provided inside the support fork 26, and a plurality of chains 25a, 25b that connect the adjacent forks arranged in a U shape. 25c is preferable. Then, by rotating one of the plurality of sprockets 21a, all the sprockets 21b, 21c, and 21d rotate, and the forks 26a, 26b, and 26c slide.

That is, when the inner side in the width direction of the pallet 12 in the supporting fork 26 is one end portion and the outer side in the width direction of the pallet 12 in the supporting fork 26 is the other end portion, the fork driving device 24 has the first chain 25a, the second chain 25b, Three chains consisting of the third chain 25c, a first sprocket 21a provided at the other end of the base end fork 26c, a second sprocket 21b provided at one end of the base end fork 26c, and one end of the intermediate fork 26b A third sprocket 21c provided in the part, and four sprockets including a fourth sprocket 21d provided at the other end of the intermediate fork 26b.
As shown in FIG. 4, after the first chain 25a is fixed at one end of the intermediate fork 26b, the first chain 25a is hung in the order of the first sprocket 21a and the second sprocket 21b, and the other end is It is fixed to the other end of the intermediate fork 26b.
The second chain 25b has one end fixed to the other end portion of the distal end fork 26a, and then is hooked on the third sprocket 21c, and the other end is fixed to the other end portion of the proximal end fork 26c.
The third chain 25c has one end fixed to one end portion of the front end fork 26a, and then is hooked on the fourth sprocket 21d, and the other end is fixed to one end portion of the base end fork 26c.

  With this structure, when one sprocket 21a of the first sprocket 21a and the second sprocket 21b of the proximal fork 26c rotates, all the sprockets 21a, 21b, 21c, and 21d in the support fork 26 rotate, The support fork 26 moves horizontally. One sprocket 21a is rotated by connecting the sprocket 21e attached to the motor and one sprocket of the proximal fork 26c (sprocket 21a in the example of FIG. 4) with an endless chain 25d, and rotating the sprocket 21e with a motor. A method of rotating the endless chain 25d is preferable. Or you may rotate by connecting a motor directly to the sprocket 21a.

The support fork 26 may be an electric cylinder provided inside or on the side of the support edge 22.
Further, it is preferable that the plurality of support forks 26 are operated in synchronization by an electric cylinder or a link mechanism.

When the support fork 26 is installed on the upper surface of the support edge 22, the recessed groove 29 extending in the length direction of the pallet 12 is provided at the storage height (FL) at the lower side outside the both ends in the width direction of the pallet 12. It is desirable to be provided. A movable platform 28 whose upper surface is vertically moved up and down is preferably provided in the concave groove 29.
The movable platform 28 includes a biasing device 28a whose lower end is fixed to the bottom surface of the concave groove 29 and expands and contracts vertically, and a floor material 28b whose lower surface is coupled to the upper end of the biasing device 28a. Then, when the support device 20 is lowered and the floor material 28 b is pushed downward, the urging device 28 a is contracted, and the support edge 22 can be lowered into the concave groove 29.
Further, when the support device 20 is lifted and separated from the floor material 28b, the load that has pushed the floor material 28b downward is eliminated, the urging device 28a extends, and the height of the upper surface of the floor material 28b is equal to the loading / unloading height. Keep the same height.
The movable platform 28 preferably uses an elastic biasing device 28a that does not contract even when a person rides on the flooring 28b.
The urging device 28a is preferably a spring or an actuator that expands and contracts vertically.

  That is, when the support device 20 installs the pallet 12 at the loading / unloading height (FL), the support arm 22 a pushes the floor material 28 b of the movable platform 28 downward to contract the urging device 28 a to the inside of the groove 29. Descend. After the pallet 12 is installed at the loading / unloading height (FL), the support fork 26 is retracted to the retreat position O to release the pallet 12 and ascend. When the support device 20 is raised, the support arm 22a is separated from the upper surface of the flooring 28b, the urging device 28a is extended, and the upper surface of the movable platform 28 becomes the same height as the loading / unloading height (FL).

As shown in FIG. 5, the pallet 12 may be supported by providing engaging portions 30 at both ends of the pallet 12 in the width direction and engaging the supporting forks 26 with the engaging portions 30. The engagement portion 30 may be a hole or a recess 30a that opens toward the inner side in the width direction of the pallet 12 shown in FIG. 5A, or protrudes toward the outer side in the width direction shown in FIG. 5B. The protrusion 30b may be used.
In addition, as shown in FIG. 5C, when the engaging portion 30 is provided on the pallet 12 and the supporting fork 26 is installed on the lower surface of the supporting edge 22, a movable platform 28 and a concave groove 29 are provided. It does not have to be.

FIG. 6 is an operation explanatory view of the two-stage parking device according to the present invention.
This example is a case where the pallet 12c located on the third floor descends to the loading / unloading height (FL) and enters and leaves, and FIG. 6A shows a parking state where the pallet 12c for 3F is located on the third floor, FIG. 6 (B) shows that the pallet 12c is being lifted, FIG. 6 (C) shows a state in which the support device 20 supports the pallet 12c at the loading / unloading height, and FIG. 6 (D) shows a loading / unloading state on the pallet 12c. ing.
In addition, in order to make a figure legible, description of the raising / lowering guide 23 is abbreviate | omitted in FIG.

As shown in FIG. 6A, in the parking state where the pallet 12c for 3F is located at 3F, the support device 20 and the string-like body 17 are supported by the suspension drive device 18 while the pallet 12c is supported by the support device 20. Is raised to a height at which the pallet 12c is positioned at 3F.
In this parking state, the two pallets 12a located on the first floor among the three stages can traverse horizontally, and the two pallets 12b located on the second floor can traverse and move up and down.

As shown in FIG. 6B, when the pallet 12c located at 3F is moved up and down, the pallets 12a and 12b positioned below are horizontally traversed in advance, and other pallets are located below the pallet 12c that is moved up and down. It needs to be nonexistent.
Next, in a state where the support device 20 supports the pallet 12c, the support device 20 is moved up and down by the suspension driving device 18, and the pallet 12c is lowered to the loading / unloading height.
A pallet support member 27 that supports the pallet 12c is provided at the loading / unloading height (FL). This pallet support member 27 is provided so as not to interfere with the horizontally extending 1F pallet 12a. The pallet support member 27 may be liftable or movable as required.

  As shown in FIG. 6C, the support device 20 pushes the movable platform 28 downward and installs the pallet 12c at the loading / unloading height (FL).

As shown in FIG. 6D, when the pallet 12c is placed at the loading / unloading height (FL), the support fork 26 is horizontally driven to the retracted position O to separate the pallet 12c from the support device 20, With the pallet 12c left on the pallet support member 27, the suspension drive device 18 raises the support device 20 and the string-like body 17 to a height that does not interfere with entry / exit and passage of people.
And the load which the support apparatus 20 was pushing disappears, the movable platform 28 rises, and the upper surface becomes the same height as the loading / unloading height (FL).

  Entry / exit is performed in the state of FIG. Therefore, when the vehicle 1 is loaded / unloaded at the loading / unloading height (FL), the string-like body 17 (such as a chain) does not get in the way, and a large loading / unloading space and a human passage space can be provided.

In FIG. 6D, after the vehicle 1 enters / exits on the pallet 12c, the suspension drive device 18 lowers the support device 20 and the string-like body 17 to the entry / exit height (FL). 6C, the movable platform 28 is pushed downward by the support device 20, and the support fork 26 is inserted into the gap formed between the lower surface of the pallet 12 and the movable platform 28, so that the support position is moved from the retracted position O to the support position. The support device 20 and the pallet 12c are connected to each other horizontally by C.
Next, the vehicle returns to the parking state shown in FIG. 6A through the state shown in FIG.

  The same applies to the case where the pallet 12b located at 2F descends to the entry / exit height (FL) and enters / exits.

  According to the above-described present invention, the support device 20 that can support the pallet 12 and the lower end 17a of the flexible string-like body 17 (for example, chain) are suspended from the support device 20 at a position that does not interfere with the vehicle 1. Since the lower end 17a of the string-like body 17 is provided with an elevating drive device 16 capable of moving up and down, (A) With the pallet 12 supported by the support device 20, the support device 20 is moved up and down to enter the pallet 12. It can be raised and lowered between the exit height and the parking space above it.

  (B) When the pallet 12 is placed at the loading / unloading height, the pallet 12 is separated from the support device 20, and the pallet 12a is left on the pallet support member 27 at the loading / unloading height. The device 16 raises the support device 20 and the string-like body 17 to a height that does not interfere with entry / exit and passage of people, so that the string-like body 17 ( Chains, etc.) do not get in the way, and a large entrance / exit space and human passage space can be provided.

  Note that the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

1 vehicle, 2 body frame,
10 Two-stage parking system,
12, 12a-12c pallet, 13a, 13b wheel,
14a, 14b horizontal rail, 15 rectangular frame,
16 Lifting drive device, 17 String body (chain, wire), 17a Lower end,
18 suspension drive,
20 support device,
21a first sprocket, 21b second sprocket,
21c 3rd sprocket, 21d 4th sprocket 21e Sprocket 22 attached to motor Support edge, 22a Support arm, 22b Connecting arm,
23 Lifting guide, 24 Fork drive device,
25a 1st chain, 25b 2nd chain, 25c 3rd chain,
25d endless chain,
26 Support fork, 26a Tip fork,
26b intermediate fork, 26c proximal fork,
27 Pallet support member,
28 movable platform, 28a biasing device, 28b flooring,
29 Groove,
30 engaging portion, 30a hole or recess, 30b protrusion

Claims (10)

A two-stage parking device in which two or more parking spaces are provided in the same installation space,
A pallet that can be moved up and down by placing the vehicle between the loading and unloading height at which the vehicle enters and leaves and the parking space above it,
A support device capable of supporting the pallet at a position not interfering with the vehicle;
An elevating drive device capable of hanging the support device at the lower end of a flexible string-like body at a position where it does not interfere with the vehicle, and raising and lowering the lower end of the string-like body,
(A) In a state where the pallet is supported by the support device, the support device is raised and lowered, and the pallet is raised and lowered between the storage height and the parking space above it.
(B) At the time of loading / unloading at which the pallet is positioned at the loading / unloading height, the pallet is separated from the supporting device, and the supporting device and the string-like body are loaded / unloaded by the lifting / lowering driving device and do not disturb the passage of people. A two-stage parking device characterized in that it is raised. The support device includes a support edge having two support arms extending in parallel with the length direction of the pallet without interfering with the vehicle;
A support fork that is horizontally driven from the support arm and protrudes horizontally in the width direction and supports both ends in the width direction of the pallet and a retreat position that is retreated to the outside in the width direction of the pallet; The two-stage parking apparatus according to claim 1, wherein:   3. The two-stage parking apparatus according to claim 2, wherein the supporting fork protrudes when a plurality of forks are stacked and slide horizontally toward the inner side in the width direction of the pallet. The support fork includes a fork drive device having a plurality of chains and a plurality of sprockets that are arranged in a U-shape and connect the adjacent forks.
4. The two-stage parking apparatus according to claim 3, wherein by rotating one of the plurality of sprockets, all the sprockets rotate and the forks slide. 5. The support forks are stacked in the order of a proximal fork, an intermediate fork, and a fork fork from the side closer to the support arm,
The inner side in the width direction of the pallet in the supporting fork is one end,
The outer side in the width direction of the pallet in the supporting fork is the other end,
The fork drive device includes three chains including a first chain, a second chain, and a third chain;
A first sprocket provided at the other end of the proximal fork, a second sprocket provided at one end of the proximal fork, a third sprocket provided at one end of the intermediate fork, and a second sprocket provided at the other end of the intermediate fork Four sprockets comprising a fourth sprocket provided,
The first chain has one end fixed to one end of the intermediate fork and then the first sprocket and the second sprocket in this order, and the other end is fixed to the other end of the intermediate fork.
The second chain has one end fixed to the other end of the tip fork and then hooked on the third sprocket, and the other end is fixed to the other end of the proximal fork.
5. The third chain according to claim 4, wherein one end of the third chain is fixed to one end portion of the front end fork, and then the other end is fixed to one end portion of the base end fork. The two-stage parking device described. At the loading / unloading height, a concave groove extending in the length direction of the pallet on the outside lower side of both ends in the width direction of the pallet;
In the concave groove, provided with a biasing device whose lower end is fixed to the bottom surface of the concave groove and expands and contracts up and down, and a floor material whose lower surface is coupled to the upper end of the biasing device,
When the support device is lowered and the floor material is pushed downward, the biasing device contracts,
The two-stage type according to claim 2, wherein the urging device extends as the support device rises and leaves the flooring, and the height of the upper surface of the flooring is maintained at the same height as the loading / unloading height. Parking device. Provided at both ends in the width direction of the pallet with holes, dents that open toward the inside in the width direction of the pallet, or engaging portions that are protrusions that protrude toward the outside in the width direction,
The two-stage parking apparatus according to claim 2, wherein the support device supports a pallet by engaging a support fork with the engagement portion.   The elevating drive device includes a flexible string-like body that extends vertically at a position that does not interfere with the vehicle, and a suspension drive apparatus that winds or unwinds the string-like body and raises and lowers its lower end. The two-stage parking device according to claim 1.   The two-stage parking apparatus according to claim 1, further comprising a pallet support member that supports the pallet at the loading / unloading height. A driving method of a two-stage parking apparatus in which two or more parking spaces are provided in the same installation space,
A pallet that can be moved up and down by placing the vehicle between the loading and unloading height at which the vehicle enters and leaves and the parking space above it,
A support device capable of supporting the pallet at a position not interfering with the vehicle;
An elevating drive device capable of hanging the support device at the lower end of a flexible string-like body at a position where it does not interfere with the vehicle, and raising and lowering the lower end of the string-like body,
(A) In a state where the pallet is supported by the support device, the support device is raised and lowered, and the pallet is raised and lowered between the storage height and the parking space above it.
(B) At the time of loading / unloading at which the pallet is positioned at the loading / unloading height, the pallet is separated from the supporting device, and the supporting device and the string-like body are loaded / unloaded by the lifting / lowering driving device and do not disturb the passage of people. A method of driving a two-stage parking device, wherein