JPS641624B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a lifting device for vehicle loading pallets in a multi-story parking system.

Normally, pallets are lifted and lowered by a lifter driven by a motor with a speed reducer, and a mechanism is used in which the pallets are suspended directly by a chain or rope via a guide wheel. However, with this mechanism, the reduction ratio of the motor must be increased, and not only a large reduction gear is required, but also a large amount of power is lost due to poor mechanical efficiency of reduction. In addition, due to the reduction gear with a large reduction ratio and the poor efficiency of the reduction machine, the tension applied to the rope is quite large, so thick ropes must be used, and the winding drum, guide wheels, etc. are required to have considerable strength. There is a drawback that the outer diameter is large and occupies a large space.

For this reason, as shown in Figure 1, the rope that raises and lowers the pallet is wrapped around each pulley that functions as a fixed pulley and a movable pulley, and the speed is reduced to less than 1/3 at the pulley section, thereby making it possible to connect to the drive source. Recently, it has been proposed to reduce the reduction ratio of the attached reduction gear to reduce the size of the reduction gear and transmission device and to improve mechanical efficiency.

The configuration and operation of this conventional device will be briefly described below with reference to the drawings. In the figure, 5 indicates pillars 1 and 2.
A winding drum 9 at both ends of the drive shaft 8 provided between the
A pallet whose four corners are suspended via ropes wrapped around 9a, 10, and 10a, 11
12 is a drive source with a speed reduction device; 12 is a guide pulley 14 whose one end is wound around the winding drum 9 and the other end is attached to the lower part of the column 1; a fixed pulley 15 fixed to the upper frame of the column 1; and a pallet 5. A movable pulley 16 that is attached to the pallet 5 and moves together with the pallet 5, a fixed pulley 17 that is fixed to the upper frame of the column 1, and a rope 12a that is fixed to a fixed point 18 at the corner of the column 1 of the pallet 5.
Similarly, one end is wound around the winding drum 9a, and the other end is attached to guide pulleys 14a and 14b attached to the lower part of the columns 1 and 3, a fixed pulley 15a fixed to the upper frame of the column 3, and a fixed pulley 15a fixed to the pallet 5. The movable pulley 16a that moves together with the pallet 5, the fixed pulley 17a fixed to the upper frame of the column 3, and the rope fixed to the corner fixing point 18a on the column 3 side of the pallet 5. The rope 13, 13a is guided in the same manner as described above. These ropes are fixed to the corners of the supports 2 and 4 of the pallet 5 through a pulley, a fixed pulley, a movable pulley, and a fixed pulley. Because of this configuration, when the drive source 11 rotates in the direction of the arrow, each rope moves in the direction of the arrow to raise the pallet 5, and the drive source 11
When rotates in the opposite direction of the arrow, the pallet 5 is lowered. In this case, due to the combination of the fixed pulley and the movable pulley, the lifting and lowering speed of the pallet 5 is reduced to 1/3 of the rope speed at the take-up drum, and the tension of the rope is also 1/3 of that when lifting directly. . That is, in the operation explanatory diagram of FIG. 2, the winding drum 9
If the rope speed of the part is v and the speed of the pallet 5 is x, then the rope speed between the guide pulley 14 and the fixed pulley 15 and between the fixed pulley 15 and the movable pulley 16 is v, and the rope speed between the movable pulley 16 and the fixed pulley 17 is v. The speed is (v-
x), the rope speed between the fixed pulley 17 and the pallet anchoring point 18 is [(v-x)-x], which is equal to the pallet speed. Therefore v−2x=x, x=
It becomes v/3. Since the rope is hung on two fixed pulleys and one movable pulley, its tension is 1/3. If we add one more moving pulley and one fixed pulley, x = v/5
Therefore, the speed of the pallet is reduced to 1/5 of the rope speed of the winding drum section, and the tension is 1/5 of that in the case of direct suspension. Therefore, compared to when the pallet is directly suspended, the rope speed from the movable pulley to the winding drum is 3 times or 5 times, and the rope tension is 1/3 or 1/5. Therefore, the structural strength of the winding drum, guide pulley, etc. used in this part can be reduced, and the diameter of the rope can also be reduced, making it possible to downsize the entire drive device. or,
Reduce the reduction ratio of the drive source reduction device to reduce this by 1/
3. Since it can be lowered to 1/5, an inexpensive reduction gear with a smaller reduction ratio than in the case of direct suspension is required, and the mechanical efficiency of the reduction gear is improved, making it possible to save on drive source input.

However, such conventional devices have the following drawbacks.

(1) Drive shaft 8 and winding drum 9, 9a, 10,
Since the rope 10a is installed at the top of one side of the pallet 5, one side of the pallet 5 can be easily lifted, but in order to lift the opposite side of the pallet 5, the rope must be wound up and placed on the road once from the drum. It is necessary to use a complicated method of hanging a rope, which involves lowering the rope to the ground, then running it along the road, raising it to the opposite side of pallet 5, and lowering it all the way to the road.

(2) Since the rope is laid on the road below the pallet 5, there is a risk that the rope may get caught on the pallet 5 as it moves up and down. Therefore, it is necessary to protect the rope by covering it with a cover or the like.

(3) Since it is generally necessary to use ropes that are flexible and therefore have a high elongation, changes in the elongation of ropes of different lengths will cause the pallet to tilt.

The present invention was made in view of the above points, and an object of the present invention is to provide a lifting device for a multilevel parking system that has a simple structure and is highly safe and reliable.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the apparatus of the present invention will be described below with reference to the drawings.

FIG. 3 is a plan view showing an embodiment of the lifting device according to the present invention, FIG. 4 is a sectional view taken along the line - - in FIG. 3, and FIG. ', 22, 22' are vertically extending L-shaped columns, one each placed at each of the four corners of the pallet 20 on which the automobile 33 is placed, and their lower ends fixed to the base 23. ' are connected by U-shaped beams 24, 24', respectively. And the support 21 of the beam 24
A sprocket 25 is attached to the side of the beam 24', and sprockets 26 and 27 are coaxially and rotatably attached to the column 22 side.
A sprocket 25' is mounted on the 1' side, and sprockets 26' and 27' and sprockets 28' and 29' are coaxially and rotatably mounted on the column 22' side. Reference numeral 30 denotes a support stand provided above the support column 22 in a horizontally projecting state for mounting the drive source 31 and the gear reducer 32, and the gear reducer 32 is composed of a bevel gear 32a and sprockets 28, 29. and are coupled in a coaxial state, and the drive source 3
1 and is driven by a bevel gear 31a. Reference numeral 41 denotes an interlocking shaft rotatably provided at the rear end of the pallet 20, and sprockets 42, 43 and 42', 43' are fixed to both ends of the shaft, respectively. 44 has one end locked to the fixing point 20a on the front side of the pallet 20, sprockets 25 and 26 provided at both ends of the beam 24, and a sprocket 42 provided at the rear end of the pallet 20.
The sprockets 25, 26, and 28 are wound around a sprocket 28 provided on the support base 30 so that the sprockets 25, 26, and 28 function as fixed pulleys, and the sprocket 42 functions as a movable pulley, and the other end is attached to a fixing point 30a on the lower surface of the support base 30.
One end of the lifting chain 45 is locked to the fixed point 20b on the rear side of the pallet 20, and the sprocket 2 provided on the beam 24 is
7. The sprocket 43 provided on the interlocking shaft 41 of the pallet 20 and the sprocket 29 provided on the support base 30 are wound around so that the sprockets 27 and 29 function as fixed pulleys and the sprocket 43 functions as a movable pulley, and the other end is a lifting chain 44' that is secured to a fixing point 30b on the lower surface of the support base 30;
is a lifting chain wound on the opposite side of the lifting chain 44, one end of which is locked to a fixed point 20'a on the front side of the pallet 20, and sprockets 25' provided at both ends of the beam 24' in the middle; 26', a sprocket 42' provided on the interlocking shaft 41 of the pallet 20, and a sprocket 2 provided on the beam 24'.
8', sprocket 47 provided on weight 46 (provided to provide tension to lifting chains 44', 45'), sprocket 25', 2
6', 28' are fixed pulleys, sprocket 42',
47 is wound so as to function as a movable pulley, and the other end is locked to a fixed point 24'a on the lower surface of the beam 24'. 45' is a lifting chain that is also wound on the opposite side from the lifting chain 45, and one end is locked to the fixing point 20'b on the rear side of the pallet 20,
Sprocket 2 installed on beam 24' midway
7', a sprocket 43' provided on the interlocking shaft 41 of the pallet 20, a sprocket 29' provided on the beam 24', a sprocket 48 provided on the weight 46, and sprockets 27' and 29' as fixed pulleys. 43' and 48 are wound around to function as movable pulleys, and the other end is locked to a fixed point 24'b on the lower surface of the beam 24'.

Because of this configuration, when the drive source 31 rotates in the direction of the arrow in FIG. When rotated, the pallet 20 is lowered. In this case, by combining each sprocket, the raising and lowering speed of the pallet 20 is reduced to 1/3 of the chain speed at the sprockets 28 and 29, and The tension is also 1/3 that of direct lifting. In other words, in one embodiment of the present invention, the same thing can be said as described in the operation explanatory diagram of FIG. 2 described above. However, in the case of the present invention, an interlocking shaft with at least one sprocket on each side is provided at the rear end of the pallet to create a simple structure that allows the left and right sides of the pallet to be raised and lowered at the same speed, and to reduce elongation. Since a small number of lifting chains are used, the pallet does not tilt, and the lifting chain can be installed in such a way that it does not interfere with the lifting and lowering of the pallet, making it extremely safe.

In addition, in the example, the case where the four corners of the pallet are suspended and driven by separate lifting chains was explained as an example, but if another mechanism that can horizontally support the overhang structure is added, the pallet can be It is sufficient to suspend only the left and right rear ends with a lifting chain, and it is not necessarily necessary to suspend the four corners of the pallet with a lifting chain.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional pallet lifting device, FIG. 2 is an explanatory diagram of the operation of the lifting device in FIG. 1, FIG. 3 is a plan view showing an embodiment of the lifting device according to the present invention, and FIG. - line sectional view in FIG. 3,
FIG. 5 is an explanatory diagram of the operation of the lifting device according to the present invention. 1 to 4, 21, 21', 22, 22'...posts,
5, 20... Palette, 24, 24'... Beam,
25, 25', 26, 26', 27, 27', 28,
28', 29, 29', 47, 48... Sprocket, 41... Interlocking shaft, 44, 44', 45, 4
5'...Lifting chain.

Claims (1)

[Claims] 1. A multi-story parking system in which a pallet for storing automobiles is driven up and down along a first column and a second column erected near the rear end of the pallet,
Near the rear end of the pallet, an interlocking shaft having a first sprocket fixed to one end and a second sprocket fixed to the other end is rotatably provided, and the upper part of the first support column and the second support column are connected to each other. are rotatably provided with a third sprocket and a fourth sprocket, respectively, and a first chain that drives the pallet by a drive device has one end attached to a fixed part above the multi-level parking device and the other end connected to the pallet. The fifth sprocket is fixed to the side of the first sprocket, and is partially driven by the drive device, and the first sprocket and the third sprocket of the interlocking shaft are connected to the third The sprocket is wound around so that it functions as a fixed pulley, and the first sprocket functions as a movable pulley, one end of which is fixed to a fixed part above the multi-story parking device, and the other end of which is attached to the side of the second sprocket of the pallet. The second chain, which is fixed to The second sprocket and the fourth sprocket are wound so that the fourth sprocket and the seventh sprocket act as fixed pulleys, and the second sprocket and the sixth sprocket act as movable pulleys. The pallet lifting device of the multi-story parking system is characterized by: