JPH07122342B2 - Multi-tiered parking device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multistage parking system having two or more stages of parking pallets.

[0002]

2. Description of the Related Art In order to effectively use a parking space,
A parking device having two or more parking pallets vertically has been put into practical use. Of this type of parking device, a vehicle storage unit is provided in the underground pit, and a vehicle placed on a pallet can be moved up and down from the underground pit to the ground so that it can be parked in the underground pit. Is also proposed.

For example, in the multi-level parking apparatus disclosed in Japanese Utility Model Laid-Open No. 1-76959, a lower pallet of a lifting body is suspended from the ground side by a pair of front and rear suspension chains, and the suspension chain is raised and lowered by a motor of a drive mechanism. It is configured to let. One end of the hanging chain is fixed to a supporting portion near the ground, and an intermediate portion of the hanging chain traverses the lower surface side of the lower pallet and is wound around guide sprockets provided on both left and right sides of this pallet. The pallet is raised when the motor is rotated in the direction for pulling up the hanging chain, and the pallet is lowered when the motor is rotated in the direction for lowering the hanging chain. Further, since the pallet may be tilted in the left-right direction only by hanging it by the above-mentioned hanging chain, a balance chain for keeping the pallet in a horizontal posture is adopted.

[0004]

In the above-mentioned conventional apparatus, when the pallet is lowered, if the motor continues to rotate in a restrained state such that the pallet is caught during the descent due to some external factor, the suspension chain gradually moves. The chain slackens, and the load of the pallet is not applied to the chain. In this case, when the pallet is unconstrained due to some reason and the pallet falls, a large impact load acts on the hanging chain, the chain end supporting portion, and the like. In particular, in a multi-level parking apparatus having a pallet of three or more levels, the weight that is applied to the hanging chain is large. Therefore, it is considered that the impact load is exerted on the chain when the above impact load is applied to the chain.

However, in the conventional structure of the suspension chain and the balance chain of the parking device, even if the pallet is caught during the descent, the tension of the chain does not increase and the motor continues to rotate. It was not possible to detect the pallet descent abnormality based on the change.

Therefore, an object of the present invention is to keep the pallet horizontal and to automatically stop the motor even if the pallet is in a restrained state for some reason while descending. It is to provide a multi-tiered parking system provided with.

[0007]

DISCLOSURE OF THE INVENTION The present invention, which was developed to achieve the above object, has a fixed structure provided with a fixed frame such as a pillar constructed in an underground or aboveground vehicle storage unit, and a two-stage structure. An elevating body having the above parking pallet and capable of moving up and down with respect to the fixed structure, a horizontal drive shaft provided on the fixed structure, a motor for rotating the drive shaft, A suspension chain drive sprocket provided on the drive shaft, suspension chain guides provided on both left and right sides of the pallet, one end fixed to the upper side of the fixed structure, and an intermediate portion traversing the pallet. A hanging chain for hanging the pallet on the lower side of the hanging chain guide and the other end of the hanging chain drive sprocket. And the balance chain guides provided on both left and right sides of the balance chain guide, with one end fixed to the upper side of the fixed structure and the middle part traversing the pallet, wrapped around the lower surface of the balance chain guide on the one side. And a first balance chain which is wound around the upper surface side of the balance chain guide on the other side and whose other end is fixed to the lower side of the fixed structure, and a first balance chain provided on the drive shaft. Two drive sprockets, a second balance chain guide provided on the same side of the pallet as the one side balance chain guide, one end fixed to the lower side of the fixed structure and an intermediate portion of the pallet. It is wound from below on the upper surface side of the second balance chain guide and also on the second drive sprocket. When the drive shaft rotates in the direction in which the pallet rises, a length corresponding to the amount of pallet rise is sent to the pallet side with the rotation of the second drive sprocket, and when the pallet descends. A second balance chain in which a length corresponding to the descending amount of the pallet is returned with the rotation of the second drive sprocket, and a means for detecting that a tension equal to or more than a set load is applied to the second balance chain. And a emergency stop mechanism for stopping the motor when a tension equal to or more than a set load is detected.

[0008]

When the motor is rotated in the direction for raising the pallet, the suspension chain drive sprocket rotates as the drive shaft rotates, and the chain moves in the direction for lifting the pallet.
The first balance chain has one end side (the side close to the upper end)
Is wrapped around one balance chain guide on the lower surface side, and the other end side (closer to the lower end) is wrapped around the upper surface side on the other balance chain guide, and both ends are fixed. Supported by the structure,
This pallet is prevented from tilting to one side (the side where the tension of the first balance chain increases).

The second balance chain prevents the pallet from tilting in the opposite direction. That is, when the pallet is raised, the length of the pallet is moved to the pallet side by the rotation of the second drive sprocket, and when the pallet is lowered, the pallet is rotated by the rotation of the second drive sprocket. Since the length corresponding to the descending amount is returned, the balance chain guide prevents the pallet from tilting to the other side. Thus, the lifting body is the first
Also, the second balance chain prevents tilting to either the left or right side, and the lifting and lowering operation can be performed while maintaining a horizontal posture.

Further, when the lifting body is restrained by some external factor while the lifting body is descending, the second drive sprocket also keeps rotating due to the continuous rotation of the motor, so that it is added to the second balance chain. When the tension gradually increases and the tension exceeds the set load of the emergency stop mechanism, the tension detecting means detects the tension abnormality of the chain, and the motor is stopped.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The multi-level parking apparatus 10 shown in FIG. 1 can move vertically in relation to a fixed structure 12 including a fixed-side frame such as a pillar constructed in a vehicle storage part of an underground pit 11 and the fixed structure 12. The lifting / lowering body 13 provided and a drive system 14 for driving the lifting / lowering body 13 are provided.

The elevating body 13 in the illustrated example has a three-stage parking pallet. That is, the lower pallet 16, the middle pallet 17, and the upper pallet 18 are provided, and the pallets 16 to 18 are connected to each other by the pallet support 19. The number of pallets may be two,
Alternatively, the number of stages may be three or more as required.

When the lifting body 13 is raised to the upper limit position, the lower pallet 16 is positioned at substantially the same height as the loading / unloading floor surface so that the vehicle can be taken in and out of the lower pallet 16, and the lifting body 13 is at the lower limit position. Since the upper pallet 18 is positioned at almost the same height as the loading / unloading floor surface when the vehicle descends to, the vehicle can be put in and taken out of the upper pallet 18. The loading / unloading floor may be, for example, substantially the same height as the ground, or may be provided at a position higher than the ground. As shown in FIG. 2 and the like, the fixed structure 12 includes vertical columns 22 and horizontal beams 23.
The stationary side frame material such as is constructed in the underground pit 11.

The drive system 14 of the parking apparatus 10 includes a pair of suspension chain mechanisms 2 arranged in front of and behind the lifting body 13.
5, a pair of front and rear first balance mechanisms 26, and a pair of front and rear second balance mechanisms 27 are included.

The pair of front and rear suspension chain mechanisms 25, as shown in FIG. 2 by way of example, includes a suspension chain 30 for suspending the lower pallet 16. One end 30a of the hanging chain 30 is connected to a support portion 31 provided near the upper portion of the support column 22. Intermediate part 30 of the hanging chain 30
b crosses the lower surface side of the lower pallet 16 and is wound around the lower surface sides of sprockets 32 and 33 as an example of hanging chain guides provided on both left and right sides of the pallet 16. Further, the hanging chain 30 is wound around a hanging sprocket 35 provided on the upper portion of the column 22, makes a U-turn downward, and is wound around an intermediate sprocket 36 and a hanging chain drive sprocket 37. The surplus portion 30d on the other end 30c side of the hanging chain 30 hangs down in a U shape.

The suspension chain drive sprocket 37 is mounted on the drive shaft 40. The drive shaft 40 is rotationally driven by a motor 41 that can rotate in the forward and reverse directions.
The drive shaft 40 is rotatably supported by bearings provided on the column 22. The rotational force of the motor 41 is transmitted to the drive shaft 40 via the power transmission mechanism 42. Therefore, when the drive shaft 40 is rotated by the motor 41, the suspension chain drive sprocket 37 is rotated, and the motor 41 is rotated.
Depending on the rotating direction of the lifting body 13, that is, the pallet 16 ~
18 goes up or down.

For example, when the hanging chain drive sprocket 37 rotates in the direction of arrow F in FIG.
The pallet 16 rises by moving in the winding direction. When the drive sprocket 37 reversely rotates in the direction of arrow R, the hanging chain 30 moves in the hanging direction, so that the pallet 16 descends.

The pair of front and rear first balancing mechanisms 26 are shown in FIG.
Is configured as shown on behalf of one side. The balance mechanism 26 has a first balance chain 45. One end (lower end) 45a of the balance chain 45 is
It is connected to the support 46 in the underground pit. The other end 45b of the balance chain 45 is connected to a support portion 47 provided on the upper portion of the column 22.

The intermediate portion 45c of the balance chain 45 is
It is wound around balance sprockets 50, 51 as an example of a pair of left and right balance chain guides provided on the pallet 16. That is, the balance chain 45 is wound around the upper surface of the sprocket 50 for the balance sprocket 50 on one side, and the balance chain 45 is wound around the lower surface of the sprocket 51 for the balance sprocket 51 on the other side. There is. The length of the balance chain 45 is constant regardless of the position of the pallet 16. Therefore, the pallet 16 is prevented from tilting to the left in FIG.

The pair of front and rear second balance mechanisms 27 are shown in FIG.
Is configured as shown on behalf of one side. This second
The balance mechanism 27 includes a second balance chain 55. One end 55a of the balance chain 55 is connected to the support portion 5 in the underground pit via an emergency stop mechanism 56 described later.
Connected to 7. The other end 5 of this balance chain 55
5 b is connected to a support portion 58 provided on the column 22. Further, the drive shaft 40 is provided with a second drive sprocket 60. The number of teeth of the sprocket 60 is the same as the number of teeth of the hanging chain drive sprocket 37.

On one side of the pallet 16, that is, on the side where one balance sprocket 51 (FIG. 3) is provided,
A second balance sprocket 61 as an example of the second balance chain guide is provided. A U-turn sprocket 62 is provided below the column 22.

The intermediate portion 55 of the second balance chain 55
The c is wound from below the pallet 16 to the upper surface side of the second balance sprocket 61 and then wound back downward, extends upward through the U-turn sprocket 62, and is wound around the second drive sprocket 60. . The surplus portion 55d on the other end 55b side of the balance chain 55 hangs down in a U shape.

As shown in an enlarged view in FIG. 5, the emergency stop mechanism 56 includes a guide member 65 for changing the direction of the second balance chain 55, and a terminal member 66 connected to the end of the chain 55. The adjusting nut 68 and the lock nut 69 screwed to the bolt portion 67 of the terminal member 66, the spring 70 that exerts a reaction force in the pulling direction of the chain 55, and the dog as a detected portion provided on the terminal member 66. 71 and a sensor 72 for detecting the dog 71 when the dog 71 moves in the direction of arrow P. The spring 70, the dog 71, the sensor 72 and the like constitute a tension detecting means 73.

The reaction force of the spring 70 (the repulsive load due to the initial deflection) can be adjusted by changing the screwing amount of the adjusting nut 68 with respect to the bolt portion 67. By adjusting the reaction force of the spring 70, the tension (setting load) of the chain 55 until the dog 71 starts moving can be variably set. That is, when the tension acting on the chain 55 exceeds the set load, the spring 71 bends in the compression direction to move the dog 71 in the direction of the arrow P, so that the sensor 72 causes abnormal tension (overload) of the chain 55. It is detected, and the motor 41 is stopped in that case. Spring 70
A coil spring as shown in the figure is suitable, but in short, as long as it can withstand the tension setting load of the chain 55, a disc spring or other appropriate elastic member may be adopted.

Next, the operation of the multistage parking apparatus 10 having the above structure will be described. When the drive shaft 40 is rotated by the motor 41 in the direction of arrow F in FIG. 2 when raising the lifting / lowering body 13, the hanging chain drive sprocket 37 and the second drive sprocket 60 rotate in the same direction and at the same peripheral speed. . The suspension chain drive sprocket 37 rotates to move the suspension chain 30 in the direction to pull up the pallet 16, and the rotation of the second drive sprocket 60 causes the second balance chain 55 to have a length corresponding to the amount of elevation of the pallet 16. Only sent to the pallet 16 side.

When the elevator 13 descends, the drive shaft 40
2 rotates in the direction of arrow R in FIG. 2, the suspension chain drive sprocket 37 and the second drive sprocket 60 are
Rotate in the direction. In this case, rotation of the lifting chain drive sprocket 37 causes the lifting chain 30 to move to the pallet 16
The second balance chain 55 is moved by the rotation of the second drive sprocket 60 while the surplus portion 55d is moved by the length corresponding to the descending amount of the pallet 16.
Is returned in the direction of.

In this way, the second balance chain 55 is supplied to the second balance sprocket 61 by the length corresponding to the amount of ascent and descent of the pallet 16, so that the pallet 16 is supplied.
Is prevented from tilting to the right in FIG. Further, the first balance mechanism 26 prevents the pallet 16 from tilting to the left. In this way, the pallet 16 is kept horizontal.

When the pallet 16 is kept horizontal as described above, the load of the lifting body 13 is substantially suspended.
It is supported only by and does not participate in the balance chains 45, 55. Then, when an external force that tilts the pallet 16 to the right or left is applied, the force of the load difference between the left and right acts on the first balance chain 45 or the second balance chain 55.

When the lifting / lowering body 13 descends and is restrained by some reason such as being caught by the lifting / lowering body 13, the motor 41 continues to rotate, so that the lifting / lowering body 13 is stopped and the second drive is performed. The sprocket 60 continues to rotate. Therefore, the tension applied to the second balance chain 55 gradually increases. When the tension exceeds the set load of the spring 70 of the emergency stop mechanism 56, the spring 72 bends in the compression direction and the dog 71 moves, so that the sensor 72 detects that an overload is applied to the chain 55,
The motor 41 stops. The emergency stop mechanism 56 is useful also for preventing an overload applied to the balance chain 55, and further improves safety.

If the lifting of the lifting / lowering body 13 is restricted by some external factor when the lifting / lowering body 13 is lifted, the motor 41 tries to keep rotating and the lifting chain 30 is kept.
However, since the suspension chain 30 has sufficient strength in the tension direction, an overload applied to the motor 41 causes the motor 41 to stop or decelerate while maintaining the current supply state, thereby protecting the motor 41. Since a mechanism (for example, a thermal relay) operates and the motor power is automatically turned off, no problem occurs.

In the parking apparatus 10 of this embodiment, the first and second balance chains 45 and 55 are arranged on the front side and the rear side of the lifting body 13, respectively.
It is possible to maintain a stable horizontal state even when a vehicle is stored in each pallet or when a lateral load is applied to the elevating body 13 because the shaking of the elevating body 13 during the ascending / descending operation is extremely reduced.

[0032]

According to the present invention, the pallet can be maintained in a horizontal posture by the first balance chain and the second balance chain, and abnormalities when the pallet descends are based on changes in the tension of the balance chain. Can be detected and the drive system can be automatically stopped in an emergency, so the safety is further improved.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a parking device showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a suspension chain mechanism of the parking device shown in FIG.

3 is a cross-sectional view showing a first balance mechanism of the parking device shown in FIG.

FIG. 4 is a sectional view showing a second balance mechanism of the parking device shown in FIG. 1.

5 is a cross-sectional view showing an emergency stop mechanism of the parking device shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Multistage parking device, 12 ... Fixed structure, 13 ... Elevating body, 16, 17, 18 ... Parking pallet, 30 ... Suspension chain, 37 ... Suspension chain drive sprocket, 40 ... Drive shaft, 41 ... Motor, 45 ... 1 balance chain, 5
0,51 ... Balance sprocket (balance chain guide), 55 ... Second balance chain, 56 ... Emergency stop mechanism, 60 ... Second drive sprocket, 61 ... Second balance sprocket (second balance chain guide), 73
... tension detection means.

Claims (2)

[Claims] 1. A fixed structure having a fixed frame such as a pillar constructed in a vehicle storage section underground or on the ground, and a parking pallet having two or more stages and capable of moving up and down with respect to the fixed structure. Elevator provided, horizontal drive shaft provided on the fixed structure, motor for rotating the drive shaft, hanging chain drive sprocket provided on the drive shaft, both left and right sides of the pallet And a hanging chain guide provided on the lower side of the hanging chain guide with one end fixed to the upper side of the fixed structure and the middle portion traversing the pallet, and the other end side hanging from the hanging chain guide. A suspension chain that is wrapped around a chain drive sprocket and that suspends the pallet, and balance chain guides that are provided on the left and right sides of the pallet, respectively. , One end of which is fixed to the upper side of the fixed structure and an intermediate portion of which is wound around the lower surface of the balance chain guide on the one side while traversing the pallet, and the other end of the balance chain guide on the other side. A first balance chain wound around the upper surface side and the other end of which is fixed to the lower side of the fixed structure; a second drive sprocket provided on the drive shaft; A second balance chain guide provided on the same side as the balance chain guide, one end of which is fixed to the lower side of the fixed structure, and an intermediate portion of which is from below the pallet to the upper surface side of the second balance chain guide. When the drive shaft rotates in the direction in which the pallet rises, the first drive sprocket is wound around the second drive sprocket. When the pallet is moved down by a length corresponding to the amount of pallet lift associated with the rotation of the second drive sprocket and the pallet is lowered, the length corresponding to the amount of pallet lowering is associated with the rotation of the second drive sprocket. A second balance chain whose length is returned, and means for detecting that a tension above a set load is applied to the second balance chain, and when the tension above the set load is detected, the motor is stopped. An emergency stop mechanism for enabling a multi-stage parking device. 2. The emergency stop mechanism urges the end member connected to the end of the second balance chain, the end member in the direction of pulling the balance chain, and the load more than a set load on the balance chain. 2. The multi-stage parking apparatus according to claim 1, further comprising a spring that causes a deflection exceeding a predetermined amount when tension is applied, and a sensor that detects that the spring has deflected by a predetermined amount or more.