JP2862845B2 - Fall prevention device for multi-story parking lot - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a vehicle parking pallet that is dropped from a driving chain in a multi-story parking garage due to any cause such as dropping or cutting, and immediately receives the vehicle-mounted pallet from the lower side to prevent further dropping. The present invention relates to a device for preventing a fall.

[0002]

2. Description of the Related Art As shown in FIG. 6, in a conventional fall prevention device, a stopper body 25 is shifted toward a base end 25a side from a center of gravity in a fixed frame 23 adjacent to a space 22 in which a vehicle-mounted pallet 21 moves up and down. At a position where the solenoid 26 is pivotally connected by a horizontal shaft 24, a solenoid 26 is fixed to the fixed frame 23 on the opposite side of the space 22 and above the stopper body 25, and is fixed on the upper surface of the base end 25 a of the stopper body 25. When the tip of the plunger 27 of the solenoid 26 is brought into contact with the stopper 26, the stopper 25 is placed in a standby position where the tip 25b side projects into the space 22 due to the eccentric weight in a steady state. The stopper body 25 is flipped up and rotated to the retreat position where the stopper body 25 escapes from the space 22 by the thrusting drive.

However, as described above, the plunger 2
In the drive method in which the upper end of the stopper 7 pushes the upper surface of the proximal end of the stopper body 25, wear of the upper surface of the proximal end cannot be avoided. When the number of operations reaches 5000 or more, the wear depth becomes 1 mm or more. Since the protruding stroke of the plunger 27 is constant, when the wear depth exceeds a certain limit, the stopper body 25
The angle of the flip-up rotation is insufficient, and the stopper 25 may not be driven to the predetermined retracted position. In such a situation, the in-vehicle pallet 21 hits the distal end portion 25b of the stopper body 25 partially remaining in the space 22, so that the in-vehicle pallet 21 cannot be moved downward.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to be able to always accurately flip up and rotate a stopper body to a predetermined retracted position without being affected by an increase in the number of operations, and to stably operate even during a power failure. An object of the present invention is to provide a fall prevention device for a multi-story parking lot that operates.

[0005]

Means for Solving the Problems Hereinafter, a description will be given using reference numerals in the accompanying drawings.
The stopper body 5 is pivotally attached to the fixed frame 3 adjacent to the space 2 in which the vehicle-mounted pallet 1 moves up and down by the horizontal shaft 4 at a position deviated to the base end 5a side from the center of gravity.
The passive plate 6 superimposed on the base end 6a from the center of gravity.
The first cam slope 8 which is pivotally attached to the fixed frame 3 by the horizontal shaft 4 passing through a bearing slot 7 inclined and formed at a portion deviated to the side and which the vehicle-mounted pallet 1 comes into contact with when the vehicle-mounted pallet 1 is moved downward, is moved to the passive plate 6. Is provided on the upper surface side of the front end portion 6b, and the second cam slope 9 with which the vehicle-mounted pallet 1 comes into contact when the vehicle-mounted pallet 1 is moved up is provided on the lower surface side of the front end portion 6b of the passive plate 6, and interlocks with the intermediate portion of the stopper plate 5. A receiving hole 11 for the ball 10 is provided, and the interlocking ball 10 is engaged with a side recess 13 of the passive plate 6 by a spring 12 to connect the stopper body 5 to the passive plate 6.

When the in-vehicle pallet 1 descending at a steady speed pushes the first cam slope 8, the interlocking ball 10 does not escape from the side recess 13 and falls at a speed exceeding the steady speed. When the incoming pallet 1 pushes the first cam slope 8, the elasticity of the spring 12 is set so that the interlocking ball 10 escapes from the side recess 13, the coupling by the interlocking ball 10 is released, and the passive plate 6 is released. When the ball is guided by the bearing slot 7 and moves obliquely downward with respect to the stopper 5, an idle groove portion 14 into which the interlocking ball 10 enters is formed in an arc shape on the side surface of the passive plate 6, and the stopper body is displaced in a steady state by an offset weight. When the tip 5b of the pallet 5 and the tip 6b of the passive plate 6 are placed at the standby position protruding into the space 2, the passive pallet 1 moves downward at a steady speed. When the pallet 1 is dropped at a speed exceeding the steady speed, only the passive plate 6 is flipped up to the retreat position while the rate 6 and the stopper body 5 are flipped up and rotated to the retreat position which has escaped from the space 2 together. The first cam slope 8 is formed so that it can be moved.

When the vehicle-mounted pallet 1 is moved upward by a suitable driving / transporting means such as an endless chain, the vehicle-mounted pallet 1 pushes the second cam slope 9 of the passive plate 6.
The passive plate 6 is automatically flipped up and rotated about the horizontal shaft 4 to the retracted position as the vehicle-mounted pallet 1 rises. At this time, since the interlocking ball 10 pressed and urged by the spring 12 is engaged with the side recess 13 of the passive plate 6, the stopper body 5 is connected to the passive plate 6. As the vehicle-mounted pallet 1 rises, it is automatically flipped up and rotated about the horizontal axis 4 to the retreat position. In-vehicle pallet 1 is stopper body 5
And the passive plate 6, the stopper body 5 and the passive plate 6 are automatically rotated downward about the horizontal shaft 4 by their respective offset weights, and the tip portions 5b, 6
The b side returns to the standby position where it protrudes into the space 2.

In normal operation, when the on-board pallet 1 descends at a steady speed and presses the first cam slope 8 of the passive plate 6, the pallet 1 is moved by the interlocking ball 10 which is urged by the spring 12. Since the connection of the stopper body 5 is maintained, the stopper 5 and the passive plate 6
Are also flipped up and rotated to the evacuation position, and the in-vehicle pallet 1 is allowed to move downward. When the vehicle-mounted pallet 1 has passed the positions of the stopper body 5 and the passive plate 6,
The stopper body 5 and the passive plate 6 are automatically rotated downward about the horizontal shaft 4 by their respective offset weights, and return to the standby position where the end portions 5b and 6b protrude into the space 2.

When the in-vehicle pallet 1 falls at a speed exceeding the steady lowering speed and collides with the first cam slope 8 of the passive plate 6 due to the failure of the drive transfer means, the collision acceleration overcomes the elasticity of the spring 12. , Interlocking ball 1
0 escapes from the side recess 13 and the connection between the stopper body 5 and the passive plate 6 is released. Therefore, the passive plate 6 moves obliquely downward with respect to the stopper body 5 by the difference between the length of the bearing slot 7 and the diameter of the horizontal shaft 4, and at the end of this movement, the interlocking ball 10 is inserted into the play groove 14 of the passive plate 6. By the engagement, the coupling action by the interlocking ball 10 is eliminated. Therefore, the passive plate 6
Only the stopper body 5 is flipped up and rotated, and the stopper body 5 is kept at the standby position where the tip 5b side protrudes into the space 2. The pallet 1 on which the passive plate 6 is pushed up hits the tip 5b of the stopper body 5 so that the pallet 1 is prevented from falling thereafter.
Is securely held in that position until repair and replacement of the drive transfer means is completed.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the illustrated embodiment, a spring case 1 is provided on a side surface of a stopper body 5 opposite to a passive plate 6.
5 is fixed by a screw 16, and a biasing spring 12 formed of a compression coil spring is accommodated in the spring case 15. The adjustment bolt 17 screwed into the top wall of the spring case 15 causes the spring holding plate 18 abutting on one end of the spring 12 to reciprocate in a direction perpendicular to the side surface of the passive plate 6 to increase or decrease the set elasticity of the spring 12. The other end of the spring 12 is in contact with the ball presser 19.

A positioning plate 20 is fixed to the fixed frame 3 in order to stop the stopper body 5 at a position where the tip 5b projects horizontally into the space 2. This fall prevention device is mounted on all or a part of four columnar fixed frames 3 erected at the four corners of the space 2 and moves up and down of the fixed frames 3 in accordance with the moving distance of the pallets 1 and 1 on the vehicle. A plurality of sets are provided in the direction.

[0012]

As described above, in the fall prevention device for a multi-story parking lot according to the present invention, the passive plate 6 is pivotally connected to the fixed frame 3 by the horizontal shaft 4 passing through the inclined slot 7, and is mounted on the vehicle when the vehicle-mounted pallet 1 moves downward. A first cam slope 8 with which the pallet 1 abuts and a second cam slope 9 with which the in-vehicle pallet 1 abuts when the in-vehicle pallet 1 moves upward are provided on the upper surface side and the lower surface side of the distal end portion 6b of the passive plate 6, and have a moderate elasticity. The stopper body 5 and the passive plate are integrally connected by the interlocking ball 10 pressed and urged by the set spring 12, and when the vehicle-mounted pallet 1 moves down at a steady speed, the passive plate 6 and the stopper body 5 bounce together. On the other hand, when the vehicle-mounted pallet 1 falls at a speed exceeding the steady speed while being raised and rotated, only the passive plate 6 is flipped up and rotated. In comparison with the conventional device in which the plunger of the solenoid pushes the upper surface of the base end of the stopper body, even if the number of operations increases, there is no drive incompleteness due to wear, and the stopper body 5 is moved to the retracted position when necessary. It can be rotated accurately and has excellent operation reliability.

In the fall prevention device of the present invention, the operation of the passive plate 6 is mechanically performed by contact with the pallet 1 mounted on the vehicle, and no electric means such as a solenoid is used as a driving means. Also function effectively as a means of ensuring safety.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of a fall prevention device for a multistory parking lot according to one embodiment of the present invention.

FIG. 2 is a left side view of the fall prevention device.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a sectional view taken along line BB of FIG. 3;

FIG. 5 when the passive plate moves obliquely downward.
It is sectional drawing corresponding to FIG.

FIG. 6 is a longitudinal sectional view of a main part of a conventional fall prevention device for a multi-story parking lot.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 On-board pallet 2 Space for moving on-board pallet 3 Fixed frame 4 Horizontal shaft 5 Stopper body 6 Passive plate 7 Bearing slot 8 First cam slope 9 Second cam slope 10 Interlocking ball 11 Ball receiving hole 12 Ball spring 13 Side recess of passive plate 14 Groove for play of passive plate 15 Spring case 17 Adjusting bolt 18 Spring presser 19 Ball presser 20 Positioning plate

Claims (1)

(57) [Claims] 1. A stopper body 5 is pivotally attached to a fixed frame 3 adjacent to a space 2 in which a vehicle-mounted pallet 1 moves up and down by a horizontal shaft 4 at a position deviated toward a base end 5a side from a center of gravity.
The passive plate 6 superimposed on the stopper body 5 is pivotally attached to the fixed frame 3 by a horizontal shaft 4 passing through a bearing slot 7 inclined at a position deviated from the center of gravity toward the base end portion 6a. The first cam slope 8 with which the in-vehicle pallet 1 abuts during the downward movement is moved to the tip 6 b of the passive plate 6.
The second cam slope 9 with which the in-vehicle pallet 1 comes into contact when the in-vehicle pallet 1 moves upward is provided on the lower surface side of the distal end portion 6 b of the passive plate 6, and the interlocking ball 10 is provided in the middle of the stopper plate 5. The receiving pallet 11 is provided, the interlocking ball 10 is engaged with the side recess 13 of the passive plate 6 by the spring 12, the stopper body 5 and the passive plate 6 are connected, and the vehicle-mounted pallet 1 that has descended at a steady speed is moved. When the first cam slope 8 is pressed, the interlocking ball 10 does not escape from the side recess 13, while the in-vehicle pallet 1 that has fallen at a speed exceeding the steady speed presses the first cam slope 8. The spring 1 is moved so that the ball 10 escapes from the side recess 13.
When the passive plate 6 is guided by the bearing slot 7 and moves diagonally downward with respect to the stopper 5 when the coupling by the interlocking ball 10 is released, the play groove 14 into which the interlocking ball 10 enters. Are provided on the side surface of the passive plate 6 in an arc shape, and in a steady state, the tip 5b of the stopper body 5 and the tip 6b of the passive plate 6 are placed in a standby position where they project into the space 2 due to the offset weight. When the pallet 1 descends at a steady speed, the passive plate 6 and the stopper body 5 are flipped up to the retreat position which has escaped from the space 2 while the pallet 1 is dropped at a speed exceeding the steady speed. A fall prevention device for a multi-story parking lot, wherein the first cam slope 8 is formed so that only the passive plate 6 can be flipped up to the retreat position and rotated.