JPH05287924A - Multi-tiered parking device - Google Patents

Abstract

PURPOSE:To halt the falling of a pallet and make sure to return the subsequent action when an obstruction comes into contact with the lower side of a pallet in a multi-tired parking device. CONSTITUTION:A feed nut 33 is installed to a lift section 20 to which a pallet 40 is mounted, which is guide-supported to a mast 12 of a post 10 and designed to load cars. A pole screwed shaft 32 rotated by a motor 37 installed to the lift section 20 vertically is engaged with the feed nut 33, thereby lifting the pallet 40 up and down. Where a motor base 31 is borne to an upper support plane A and a lower part plane B formed on the post 10 in such a fashion that it may float by a slight distance and upper and lower section of the screwed shaft 32 is pivoted with the motor base and the lower part bearing 35, if a safety switch 50 detects the floating of the motor base 31 or the lower part bearing 35, a control device 18a will halt the operation of a motor 37.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-story parking apparatus in which a pallet for mounting a vehicle is vertically mounted on a support column standing on a foundation surface, and in particular, an obstacle is brought into contact with the lower side of the pallet being lowered. The present invention relates to a multi-level parking device having a safety function of stopping the lowering of a pallet when it is carried out.

[0002]

2. Description of the Related Art In a multi-level parking apparatus of this type, as disclosed in, for example, Japanese Utility Model Laid-Open No. 54-871, a carriage for supporting a vehicle is lifted up and down on a column which is almost vertically installed on a foundation surface. A screw rod, which is freely guided and supported and is rotatably supported by a support, is screwed into a nut-shaped receiver that is located along the vertical surface of the guide piece of the carriage, and the motor drives the screw rod to rotate and raise and lower the carriage. There is a device in which a micro switch is actuated to stop the motor when the receiver is lowered by a certain amount with respect to the guide piece. According to this technology, if an obstacle comes into contact with the lower side of the pallet while it is descending, the micro switch will actuate and stop the pallet from descending. There is no risk of damage to the receiver.

[0003]

However, in the three-dimensional parking apparatus having such a structure, since the nut-shaped receiving body having a relatively short length partially comes out downward from the guide piece of the carriage during operation, the receiving body tilts. If this happens, twisting may occur and the receiver may not return into the guide piece, which may cause malfunction or failure. The present invention aims to solve such problems.

[0004]

To this end, the multi-story parking apparatus according to the present invention has a pillar portion 1 having a substantially vertical mast 12 provided on a foundation surface G, as illustrated in the accompanying drawings.
0, an elevating part 20 to which a pallet 40 for mounting a vehicle that is vertically supported by the mast 12 is mounted, and an elevating device 30 that elevates the elevating part. A screw shaft 32 rotatably supported almost vertically, a feed nut 33 fixed to the elevating part 20 and screwed with the screw shaft 32, and the screw shaft 32.
In a multi-level parking apparatus including a motor 37 for rotating and driving the elevator 20 to raise and lower the elevating unit 20 and the pallet 40, an upper support surface A and a lower support surface B formed substantially horizontally on the upper and lower portions of the pillar unit 10, respectively. And the screw shaft 32
A motor base 31 which supports the upper part of the shaft through an upper bearing 34 and which can float above the upper support surface A to some extent and is substantially prevented from rotating, and the screw shaft 3.
2 and a lower bearing 35 supported on the lower support surface B so as to be able to float a little distance, and at least one of the motor base 31 and the lower bearing 35 is the upper support surface A or the lower support surface. A safety switch 50 that operates by detecting that it has levitated from B, and a control device 18a that stops the motor 37 when this safety switch operates.
It is characterized by having.

[0005]

When the screw shaft 32 is rotationally driven by the motor 37, the elevating part 20 to which the pallet 40 is attached moves to the mast 12.
Go up and down along. When an obstacle comes into contact with the lower side of the pallet 40 that is descending and the pallet 40 stops descending, the rotationally driven screw shaft 32 starts to move upward along the axis of the pallet 40, and a motor that supports the upper and lower parts of the screw shaft 32. The base 31 and the lower bearing 35 also float apart from the upper support surface A and the lower support surface B. The safety switch 50 operates by detecting this floating, and the control device 18a stops the motor 37 by this, so that the multi-level parking device stops operating.

[0006]

As described above, according to the present invention, if an obstacle comes into contact with the lower side of a pallet that is descending and the pallet does not descend, the motor stops, so that an excessive load is applied to the motor. , There is no risk of damaging the screw shaft or feed nut. Also, the screw shaft that moves during this operation has its upper and lower parts supported by the column part through the motor base and the lower bearing, and the distance between them is large, so there is almost no tilt, and therefore twisting occurs. Since the screw shaft will not return, it will not cause malfunction or failure.

[0007]

1 to 4 show an embodiment in which the present invention is applied to a cantilever type three-dimensional parking apparatus. The pillar portion 10 that supports the pallet 40 so that it can be raised and lowered through the lifting portion 20 is vertically erected from the base 11 placed on the foundation surface G, as shown in FIGS. 2 to 4 excluding the pillar cover 16. It is composed of a pair of fixed masts 12, a cross beam 13 connecting the upper parts thereof, and an upper plate 14. As shown in FIG. 1, a control box 1 having a control device 18a (see FIG. 4) built in on the back surface of the column 10
8 is provided, and an operating device 19 provided with a push button switch is provided at the lower end of the inverted L-shaped wiring pipe provided so as to project laterally from the upper surface of the column 10.

As shown mainly in FIGS. 2 and 3, the elevating part 20 is formed by connecting a pair of left and right brackets 21 by a pair of upper and lower connecting plates 22. Inside each bracket 21, both connecting plates 22 are connected. A pair of guide plates 2 parallel to each other
3 is fixed. The elevating part 20 is guided and supported by the mast 12 so as to be able to ascend and descend via a vertical guide roller 25 and a lateral guide roller 27 provided on the guide plate 23. Information board 2
As best shown in FIG. 2, the outer peripheral surfaces of the upper and lower pairs of vertical guide rollers 25 pivotally supported by the support shaft 26 fixed to the inner side of the front and rear flanges of the mast 12 having the groove-shaped cross section are shown in FIG. It abuts against the pallet 40 and receives the bending moment of the vehicle mounted on the pallet 40, and the guide plate 2
Two pairs of upper and lower horizontal guide rollers 27 pivotally supported by a support shaft 28 fixed to the outer peripheral surface of the mast 12 are in contact with the bottom surface of the mast 12 to regulate the horizontal movement and inclination of the elevating part 20. There is. At the bottom of each bracket 21, there is a pallet 4 which will be described later.
A downward U-shaped support portion 21a for attaching the fork portion 41a of the pallet body 41 of No. 0 is formed. A support plate 24 to which a ball nut 33 of an elevating device 30 described below is attached is horizontally projected and fixed from the lower connecting plate 22. It should be noted that slits 16 a are formed on both sides of the column cover 16 to allow the connecting plate 22 to pass therethrough.

Next, an elevating device 30 for elevating the elevating part 20.
Explain. As shown in FIGS. 2 to 4, the motor base 31 supporting the motor 37 is horizontally movable on the horizontal upper support surface A formed by the upper surface of the cross beam 13 of the strut 10, and the upper surface of the cross beam 13 is supported. It is supported so that it can surface. The vertical ball screw shaft 32 has a slightly smaller diameter upper portion 32a.
Through the hole 13a provided in the lateral beam 13 to the motor base 31
It enters into one side part of the above and is fastened and supported by the motor base 31 by being tightened by the lock nut 32c to the inner race of the upper bearing 34 composed of a pair of angular ball bearings.

The detent 39A of the motor base 31 is composed of a detent pipe 39a which is vertically fixed to the upper surface of the cross beam 13 with a tightening bolt 39b via a washer 39c. The upper part of the detent 39A is a hole formed in the motor base 31. It projects above 31a. Ball screw shaft 32
A considerable gap is provided along the entire circumference between the hole 13a, the hole 13a, and the rotation stopper 39A and the hole 31a. Within the range of the gap, the motor base 31 can move horizontally a little on the upper support surface A. Also, a slight rotation is allowed as a whole. Further, the motor base 31 can be floated from the upper surface of the cross beam 13 if it is pushed up by the ball screw shaft 32. A worm wheel of a gear box 36 provided above the motor base 31 is coaxially fixed to the upper end of the ball screw shaft 32, and an input shaft 36a fixed to the worm of the gear box 36 is fixed on the motor base 31. The output shaft 37 a of the motor 37 is connected via a shaft joint 38. An electromagnetic brake that prevents rotation of the ball screw shaft 32 when the operation is stopped is provided above the gear box 36.

A motor base 31 having an upper bearing 34 is provided on a lower support surface B formed by the upper surface of the base 11.
A lower bearing 35 is supported so as to be horizontally movable and capable of floating above the upper surface of the base 11, and a lower portion 32b of the ball screw shaft 32 is fitted in an inner race of the lower bearing 35 so as to be directly below one side of the lower bearing 35. And is fixed by a push screw 35c.

A pair of holes 35b are formed in the flange portion 35a fixed to the outer race of the lower bearing 35, and a pair of detent bolts 39 screwed and fixed on the upper surface of the base 11.
B protrudes upward through each hole 35b with a considerable gap on the entire circumference, and the flange portion 35a can move horizontally a little on the lower support surface B within the range of this gap, and as a whole. A slight rotation is allowed. Further, when the lower bearing 35 is pulled up by the ball screw shaft 32, the flange portion 35a is prevented from rotating by a bolt 39.
It can float from the upper surface of the base 11 until it contacts the head of B. Ball nut 33 screwed onto the ball screw shaft 32
2 is a connecting plate 2 of the elevating part 20 as shown in FIGS.
It is fixed to a support plate 24 that horizontally projects from the position 2.

As shown mainly in FIG. 4, the detent 39
Upper end of the anti-rotation pipe 39a and tightening bolt 39b
A safety switch 50 is attached to a support plate 51 that is sandwiched and fixed between the heads. The detection rod 50a of the safety switch 50 extends downward from the support plate 51, and its tip is between the upper surface of the motor base 31 when the motor base 31 is supported on the upper support surface A without floating as illustrated. Face the motor base 3 with a slight distance between
If 1 floats away from the upper support surface A, the motor base 3
The upper surface of the motor 1 is brought into contact with the upper surface of the motor 1 and moves backward to detect the floating of the motor base 31. The motor 37, the safety switch 50, and the operating device 19 are connected to the control device 18a. The control device 18a operates the motor 37 in response to the operation of the push button switch provided on the operation device 19, moves the pallet 40 up and down through the elevating device 30, and the safety switch 50 detects the floating of the motor base 31. For example, it operates so as to stop the motor 37.

As shown in FIGS. 1 to 3, the pallet 40 comprises a flat rectangular pallet body 41 and a pair of treads 42 fixed to both short sides of the pallet body 41. A pair of wheel stoppers 43 are fixed to the pallet, and a pair of handrails 44 are erected and fixed on the long side of the pallet body 41 on the side opposite to the support column 10. Pallet body 41
A pair of fork parts 41a projecting to the column part 10 side are formed in the middle part of the frame in the longitudinal direction, and each fork part 41a enters into the downward U-shaped support part 21a under each bracket 21 and The pallet 40 is supported by the elevating part 20 by inserting and connecting the two connecting pins 45a and 45b into the fork part 41a and the supporting part 21a.

When the ascending button provided on the operating device 19 is pressed in the illustrated lowered position, the control device 18a actuates the motor 37 in the ascending direction to cause the shaft coupling 38 and the gear box 36 to move.
The ball screw shaft 32 is rotated in the ascending direction via the, and the elevating part 20 ascends together with the pallet 40 by the ball nut 33 provided on the connecting plate 22 and screwed with the ball screw shaft 32. When the pallet 40 reaches a predetermined ascending position and an ascending side limit switch (not shown) is actuated,
When the stop button 9 is pressed, the lifting unit 20 stops.

When the down button is pressed from this raised position, the control device 18a operates the motor 37 in the down direction, rotates the ball screw shaft 32 in the down direction, and lowers the elevating part 20 together with the pallet 40, thereby lowering as shown in the figure. When the position reaches the position and the lower limit switch (not shown) is activated or the stop button is pushed, the lifting unit 20 and the pallet 40 are stopped. As a reaction force of the rotation moment applied to the ball screw shaft 32 during the up-and-down movement, a moment that tries to rotate the motor base 31 around the vertical axis acts, but this moment is generated by the ball screw shaft 32 and the rotation stop 39A, respectively. It is received by contacting the inner circumferences of the holes 13a and 31a. The weight of the pallet 40 and the vehicle mounted on the pallet 40 is mainly supported by the upper bearing 34 via the feed nut 33 and the ball screw shaft 32.

If the pallet 40 is lowered with an obstacle such as a tool box left behind on the base 11 or the foundation surface G, the pallet 40 will reach the lowered position and the lower surface will be obstructed before the lower limit switch is activated. It comes into contact with an object and does not descend any further. As a result, the feed nut 33 also stops descending, so that the ball screw shaft 32 rotatably driven by the motor 37 moves upward along its axis, and the motor base 31 supporting the upper and lower parts thereof and the lower bearing 35 also support the upper part. The surface A and the lower support surface B are separated and levitated. The motor base 31 floats up from the upper supporting surface A to detect the detection rod 50a.
If it touches the tip, the safety switch 50 will move to the motor base 31.
Is detected, the control device 18 stops the motor 37, so that the multi-level parking device stops operating. In this state, press the up button of the operation device 19 to raise the pallet 40 a little and then stop it with the stop button. After removing the obstacle, press the down button again and the pallet 4
0 reaches the normal lowered position and stops.

In this way, the motor 37 stops when the obstacle comes into contact with the lower side of the pallet 40 that is descending and the pallet 40 does not descend. Therefore, an unreasonable load is applied to the motor 37 or the ball screw shaft 32 There is no risk of damaging the ball nut 33. The ball screw shaft 32 that moves during this operation has its upper and lower portions supported by the support column 10 via the motor base 31 and the lower bearing 35, and the distance between the two 31 and 35 is large, so it is almost the same. The ball screw shaft 32 does not tilt, and therefore the ball screw shaft 32 does not return due to twisting. Therefore, this does not cause malfunction or failure.

In the above embodiment, the safety switch 50 is operated by detecting the floating of the motor base 31, but the present invention is implemented by the safety switch 50 being operated by detecting the floating of the lower bearing 35. May be. In addition, although the above embodiment has described the multi-level parking apparatus of the type in which the pallet 40 is cantilevered by the pair of lifting units 20, the present invention is not limited to this, and the pallets are supported by both sets by the multiple lifting units. It can also be applied to a type of multilevel parking system.

[Brief description of drawings]

FIG. 1 is an overall perspective view of an embodiment of a multi-level parking device according to the present invention.

FIG. 2 is a sectional view taken along line 2-2 of the embodiment shown in FIG. 1 from which a column cover is removed.

3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is a front view mainly showing a lifting device.

[Explanation of symbols]

10 ... Struts, 12 ... Mast, 18a ... Control device, 20
... Lifting unit, 30 ... Lifting device, 31 ... Motor base, 32
... screw shaft (ball screw shaft), 33 ... feed nut (ball nut), 34 ... upper bearing, 35 ... lower bearing, 37 ... motor, 40 ... pallet, 50 ... safety switch, A ... upper support surface, B ... lower Support surface, G ... Basic surface.

Claims (1)

[Claims] 1. A column part having a substantially vertical mast provided on a foundation surface, an elevating part to which a pallet for guiding and elevating the mast to mount a vehicle is attached, and an elevating part for elevating the elevating part. The lifting device includes a screw shaft rotatably supported substantially vertically on the support column, a feed nut fixed to the lifting unit and screwed with the screw shaft, and the screw shaft. In a multi-level parking device including a motor that is driven to rotate to elevate and lower the elevating unit and a pallet, an upper supporting surface and a lower supporting surface formed substantially horizontally on an upper portion and a lower portion of the pillar, respectively, and an upper portion of the screw shaft. And a lower part of the screw shaft and a motor base which is supported by an upper bearing so as to be able to float a little distance on the upper support surface and is substantially prevented from rotating. A lower bearing supported on a surface so as to be able to levitate a little distance, and a safety switch that operates by detecting that at least one of the motor base and the lower bearing has levitated from the upper support surface or the lower support surface, and A multi-level parking device comprising a control device that stops the motor when a safety switch operates.