JPH0559830A - Elevating method in two-stage parking device and method therefor - Google Patents

Abstract

PURPOSE:To increase a drive force and a shift speed by elevating a pantograph provided between a base plate and an elevating pallet with the use of a chain driven by an eccentric sprocket. CONSTITUTION:A roller 7 at the lower end of a support arm 2 in a pantograph is set on a base plate 1, and a lower end of an elevating arm 3 is journalled to the base 1. A driven sprocket 10 is provided at the lower surface of an elevating pallet 4, and is adapted to be driven by a motor 9. An eccentric elevating sprocket 12 is fixed to the shaft of the sprocket 10, and the upper end of the arm 2 is rotatably attached thereto. A chain support fixture 13 is attached to the shaft of a roller 7 at the upper end of the arm 3, and an elevating roller chain 16 is wound around the sprocket 12 and an auxiliary sprocket 14, being stretched therebetween, through the intermediary of the support fixture 13 so that the pallet is elevatable. Further, the eccentricity of the sprocket 12 is set so that the initial drive force becomes maximum. With this arrangement it is possible to increase the start torque and to increase the shift speed intermediate of elevation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for raising and lowering a lifting pallet in a two-stage parking apparatus.

[0002]

2. Description of the Related Art Conventionally, various parking devices have been developed and used, but in recent years, as the number of vehicles owned has increased, attention has been focused on securing a parking space and improving efficiency. The two-tiered parking system to be installed in the area is in the spotlight. Hydraulic drive is often used for this two-stage parking apparatus, and there is currently no motorized lifting method and apparatus that can obtain a large initial driving force during lifting.

[0003]

The conventional two-stage parking system is roughly classified into a direct elevating system and a pantograph system. However, in the direct elevating system, since there are pillars and the like, there is a hindrance to entry and exit. In addition, it is not visually preferable. In the pantograph method, the above drawbacks are eliminated, but when a pallet is raised, a large initial driving force is required, so that a hydraulic cylinder or the like is used, but the structure becomes complicated.
When driving with a motor, the motor power must be increased in order to increase the driving force when moving up and down with a chain sprocket. Alternatively, the outer diameter of the sprocket may be reduced, but at this time, the lifting speed will be reduced. In other words, this pantograph system has a problem that a large driving force is required because the pantograph is in a folded state at the time of initial ascent, and the driving force is small as it ascends, but the ascending speed decreases. .. The present invention has been invented to solve the problems associated with the conventional two-stage parking apparatus described above. It is possible to obtain a large initial driving force with a relatively small power, and at the intermediate position by the eccentric sprocket. It was developed for the purpose of providing a parking device and an ascending / descending method capable of ascending / descending at a uniform speed as a whole by adjusting the ascending / descending speed.

[0004]

The first invention of the present application is 2
It relates to the method of raising and lowering in a multi-tiered parking system,
In the ascending / descending method by the movement of the support arm located between the base plate and the elevating pallet and the elevating arm that is moved by the roller chain wound around the drive sprocket and pivotally supported by the support arm, by eccentrically rotating the drive sprocket. A method of raising and lowering a two-stage parking device characterized by increasing an initial driving force. A second invention of the present application relates to a parking device used for carrying out the first invention relating to a lifting method, wherein the lifting arm and the support arm are located between a base plate and a lifting pallet and are pivotally supported by a support shaft. In a parking device that has a roller chain wound between a drive sprocket driven by a motor and an auxiliary sprocket, and the upper part of the lifting arm is attached to the roller chain at an appropriate position, the center of the drive sprocket and its rotation center are deviated. It is a two-stage parking device characterized by being centered.

[0005]

The operation of the raising / lowering method of the first invention and the parking device of the second invention of the present application will be described with reference to FIGS. 4 and 5.
4 shows the lowermost position of the lifting pallet, and FIG. 5 shows the uppermost position of the lifting pallet. In FIG. 4, the sprocket shaft (center of rotation) is located below the center of the sprocket and rotates in the direction of the arrow. This rotation moves the drive roller chain, and the upper end of the lifting arm is fixed to this roller chain. Therefore, the elevating arm gradually rises, and at the same time, the supporting arm also moves and elevates. Further, the roller chain is wound between the drive sprocket and the auxiliary sprocket, and the auxiliary sprocket is always pulled by the spring, so that the roller chain is appropriately tensioned. In FIG. 4, the distance between the center of rotation and the lower end of the sprocket is short, so a large drive torque can be obtained, and the initial movement can be performed smoothly. Further, in FIG. 5, the center of rotation is located above the center of the sprocket, and the driving torque is small, but on the contrary the amount of movement of the roller chain is large, which increases the moving speed of each arm, that is, the speed of the lifting pallet. In the conventional ascending / descending by moving the arm at a constant speed, the initial rising speed of rising is large, but the speed becomes smaller as it approaches the end point, and the initial driving torque becomes large, which may be small at the end. Therefore, a large power source is required to increase the initial torque, and a large sprocket diameter is required to increase the lifting speed.
According to the present invention, the sprocket is eccentrically rotated, and the initial torque is increased by selecting and setting the positions of the sprocket center and the rotation center during initial movement.
After that, the moving speed can be increased.

[0006]

EXAMPLES Examples of the present invention will be described below. In FIG. 1, (1) is a base plate, (2) is a support arm, (3) is an elevating arm, and (4) is an elevating pallet having an inclined surface at the front. The support arm and the elevating arm are pivotally supported by a support shaft (5), the lower end of the elevating arm is pivotally supported by an arm stay (6) fixed to a base plate, and the lower end of the supporting arm has a roller (7). Is pivotally supported. A motor (9) equipped with a drive sprocket (8) is attached to the lower surface of the lifting pallet, and a drive roller chain (11) is stretched between the driven sprocket (10) and the drive sprocket that are axially supported near the motor (9). ing. An elevating sprocket (12) is eccentrically provided on the same axis as the driven sprocket, and the upper end of the support arm is rotatably attached. A roller (7) is pivotally supported on the upper end of the elevating arm, and a chain support tool (13) is coaxially supported. An auxiliary sprocket (14) is provided at a required position in front of the lifting pallet via a spring, and an intermediate sprocket (15) is located between the lifting sprocket and the chain support.
An elevating roller chain (16) is wound around each of the intermediate sprocket, the chain support, and the auxiliary sprocket. A heater (17) is built in each of the base plate and the lifting pallet. In this example, the lifting arm, the support arm, the motor, the parts from the drive sprocket to the lifting roller chain are the same on the left and right when viewed from the front, and the upper and lower arms are connected to each other by pipes (not shown). Connected.

FIG. 2 shows the state of the lowermost position of the lifting pallet. In order to reach the state of FIG. 2 to FIG. 1, first, when the motor (9) is driven, the drive sprocket (8) rotates and at the same time. The drive roller chain moves and the driven sprocket (10) begins to rotate. The motor used in this example is a reduction gear built-in type, and by transmitting from a small-diameter drive sprocket to a large-diameter driven sprocket, the speed is further reduced and the drive torque is increased. At the same time as the driven sprocket rotates, the lifting sprocket (12) mounted eccentrically rotates to pull the lifting roller chain (16) and raise the lifting arm (3) around the arm stay (6) as the center of rotation. As a result, the lifting pallet rises. The intermediate sprocket (15) adjusts the direction of the lifting roller chain (16), and the auxiliary sprocket (14) applies tension by a spring to prevent the lifting roller chain from loosening. The eccentric position of the lifting sprocket is set so that the maximum torque can be obtained in the initial rising state, as described in the section [Operation]. The elevating sprocket used in this example is provided so that the elevating pallet reaches the uppermost point after about two rotations. See also FIG.
At the lowest point of elevation, the front part of the elevation pallet is inclined as shown in (4), which is convenient for vehicle mounting. A heater (17) is built in the base plate and the lifting pallet of this example, which is also suitable for use in a snowfall area. It should be noted that what is indicated by a virtual line in the drawing is a storage box (20) for storing desired tools and the like, and an opening / closing lid (not shown) for entry and exit is provided in an appropriate place.

FIGS. 6 to 7 show another embodiment of the device of the present invention. The device of the preceding example is built in a case (21), which is buried in the ground and the position of the lowest point of the lifting pallet. In the above, the pallet upper surface and the ground are configured to be in a flat state. The case used in this example is
An inclined surface for entering and exiting the car is provided in the front part, and the base plate is fixed to the case. Unlike the previous example, the front part of the lifting pallet is flat. In this example, when the lifting pallet is lowered, it becomes flush with the ground surface, so the pallet surface can be used for other purposes when the equipment is not in use, and if a grass-like sheet or the like is provided on the lifting pallet. It will be visually good.

[0009]

According to the raising / lowering method of the present invention, the drive sprocket is eccentrically rotated and the eccentric position is set to increase the starting torque and increase the speed at the intermediate position during the raising / lowering. Since a uniform ascending / descending speed can be obtained as a whole and a relatively small drive motor output can be used, running costs can be reduced. Further, the parking device of the present invention uses an auxiliary sprocket to give a proper tension to the lifting roller chain to prevent the roller chain from falling out of the sprocket and enable a smooth operation, and as shown in the first embodiment, By tilting the front part of the lifting pallet downward, it is possible to provide a device suitable for the above method, which is convenient for mounting on a vehicle.

[Brief description of drawings]

FIG. 1 is a left side view with a part cut away at the uppermost position of the lifting pallet of the present invention.

[Fig. 2] Left side view of the lowermost position of the lifting pallet of the present invention

FIG. 3 is an explanatory view of main parts showing a driven sprocket and a lifting sprocket according to the present invention.

FIG. 4 is an explanatory view of the operation of the present invention.

FIG. 5 is an operation explanatory view of the present invention.

FIG. 6 is an explanatory view showing another embodiment of the present invention.

FIG. 7 is an explanatory diagram showing another embodiment of the present invention.

FIG. 8 is a front view of the usage state of the present invention.

[Explanation of symbols]

 1 Base Plate 2 Support Arm 3 Elevating Arm 4 4'Elevating Pallet 5 Spindle 6 Arm Stay 7 Roller 8 Drive Sprocket 9 Motor 10 Driven Sprocket 11 Drive Roller Chain 12 Elevating Sprocket 13 Chain Support 14 Auxiliary Sprocket 16 Elevating Roller Chain 17 Heater 18 Sprocket shaft 19 Sprocket center 20 Storage box 21 Case

Claims (5)

[Claims] Claim: What is claimed is: 1. A driving sprocket is biased in a lifting method by moving a support arm located between a base plate and a lifting pallet and a lifting arm which is moved by a roller chain wound around the driving sprocket and pivotally supported by the support arm. A method of raising and lowering a two-stage parking apparatus, characterized in that an initial driving force is increased by rotating the core. 2. A lifting chain and a supporting arm, which are located between a base plate and a lifting pallet and are pivotally supported by a supporting shaft, wherein a roller chain is wound between a drive sprocket and an auxiliary sprocket driven by a motor, and In a parking device in which an upper part of an elevating arm is attached to a proper position of a roller chain, a center of a drive sprocket and a center of rotation thereof are eccentric. 2
Tiered parking system. 3. The two-stage parking apparatus according to claim 2, wherein a storage box is provided on the lower surface of the lifting pallet. 4. A two-stage parking system according to claim 2, wherein a heater is built in the lifting pallet, the base plate, or both. 5. The apparatus of the present invention is housed in a case, and
The two-stage parking apparatus according to any one of claims 2 to 4, wherein the base plate is fixed in the case, and the upper and lower surfaces of the lifting pallet and the upper end of the case are aligned at the lowest point of the lifting pallet.