JPH06345352A - Elongation detector for lift base hoist cable - Google Patents

Abstract

PURPOSE:To surely detect elongation of a hoist cable by vertically movably connecting at least two hoist cables for hoisting a lift base thereto, also energizing the cable downward by a spring or the like, and detecting relative moving between the lift base and the hoist cable by a detector. CONSTITUTION:A lift base can be lifted along a guide rail 24 provided in a lift base road in a sky parking lot or the like to provide a braking means containing a roller (suppressing piece) 58, guide piece 57, etc., in both end parts, and the lift base is lifted by rotating a drive wheel through hoist cables 37 linked to be wound so as to connect a counter. In the hoist cable 37, one end side is connected to a rod 46 slidably supported to a bracket part 48 of the lift base, and the rod 46 is energized downward by a spring 52. In the case of generating elongation in the hoist cable 37, the rod 46 is displaced downward by the spring 52, and by dislocating a contactor from a dog 51, a limit switch 54 is turned on to generate an alarm from a buzzer, lamp, or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stretch detecting device for a lifting rope of a lifting platform.

[0002]

2. Description of the Related Art The following lifting devices are known as conventional lifting platform suspension devices. That is, the lifting table is connected to the counterweight via at least two suspension ropes (including wires, chains, etc.) hung on the drive wheel, and the lifting table is used as a winding drum. It is known that it is wound around and is suspended by at least two suspension ropes.

[0003]

2. Description of the Related Art In the conventional lifting platform suspension device, when one of the suspension cables for suspending the lifting platform is extended, a heavy load is applied to the suspension cable which is not extended. In order to prevent this, it is necessary to know that the suspension rope has stretched early. The present invention has been made based on such a request.

[0004]

In order to achieve the above object, the present invention employs the following means. According to the present invention, the lift table is suspended by at least two suspension ropes, and the suspension ropes are vertically movably connected to the lift table and are urged downward by a spring or the like. A detector for detecting relative movement with the suspension rope is provided.

[0005]

The present invention has the following functions. When any one of the hanging ropes extends by a set amount, the detector corresponding to the extended hanging rope operates,
You can know that.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings. In this specification, the front means the upper side in FIG. 1, the rear means the lower side in FIG. 1, the left means the left side in FIG. 1, and the right means the right side.

A pair of front and rear rack devices 3 are erected and housed in a building 2 having a rectangular plan shape and a high height so as to open a lift passage 12. The rack device 3
Is higher than the left and right main columns 4 of the building 2, the left and right rack columns 5 on the side of the elevator passage 12 side by side in the front-back direction, and the left main column 4 and the same rack column 5. A large number of pallet bearing bars 7 that are passed at a predetermined interval in the vertical direction
And a pallet support bar 7 passed to the right main support column 4 and the rack support column 5 so that the upper surfaces of the left pallet support bars 7 are flush or nearly flush with each other. The car storage shelves 8 are constituted by the pallet support rails 7 that form a pair on the left and right. Of the whole vehicle storage shelves 8, one-fifth or less of the upper car storage shelves 8, for example, the car storage shelves 8 from the top to the third are used as the high-roof vehicle shelves 8B, and the remaining car storage shelves. 8 is an ordinary passenger car shelf 8A. The high-roof vehicle 1B has a vehicle height of 1 such as recreational vehicles (RV vehicles) and light vans.
It means a car with a high vehicle height of more than 550 mm and 2000 mm or less, and the ordinary passenger car 1A means a passenger car with a vehicle height of 1550 mm or less. Note that, in the following description, a normal passenger car shelf 8A and a high-roof car shelf 8B will be referred to as a car storage shelf 8 unless otherwise specified.
As described below.

On the left and right pallet support bars 7, that is, on each of the car storage shelves 8, rectangular car pallets P that are long in the left-right direction are placed. Vehicle 1 (In the following description, vehicle 1 is a normal passenger vehicle 1A and a high roof vehicle 1
Both of them will be described as a vehicle 1 unless they are used as a superordinate concept to B and must be described with special distinction between them. ) Is placed on a pallet P as will be described later in detail, and is parked on the car storage rack 8 (normal passenger car rack 8A or high roof car rack 8B).

A space 15 is provided above the floor 15 of the building 2, and the car 1 enters the storage space 16 through the front storage port, and the storage space 16 passes through the storage space. Car 1 is set to leave. The floor 15
An opening 1 through which an elevator 25 to be described later passes in the central part of the
7 are formed. Also, below the floor 15, there is a pit 1.
8 is formed, a known lifting device 19 is installed at the bottom of the pit 18, a known horizontal turning device 20 is installed on the lifting frame of the lifting device 19, and a plane-shaped rectangle is formed on the rotating body of the horizontal turning device 20. The turntable 21 is attached so that it can pass through an opening 26 formed in a horizontal portion 25a of a lift table 25 described later. With such a structure, the turntable 21 can be raised and lowered and horizontally swiveled.

A pair of left and right long guide rails 24 are provided on the left and right sides of the building 2 facing the elevator passage 12, and an elevator platform 25 is provided along these guide rails 24 by an elevator device 31 as described below. It can be raised and lowered. As shown in FIGS. 5 to 8, the elevating device 31 has a counterweight 34 which is vertically movable along a pair of vertically long guide rails 33 provided on the left side of the building 2. The upper ends of the counterweights 34 are connected to the left and right sides of the elevating table 25, and the ends of the required ropes 37 for the left side required book and the right side required book, which are connected as described later. When viewed from the counterweight 34 side, the left and right suspension ropes 37 are the wheels 38 and the drive wheels 3.
9. After being hung on the wheel 40 in the listed order, it is connected to the lift 25. As described above, the suspension rope 3
7 is a required book on the left side and a required book on the right side, so wheel 3
8, the drive wheel 39 and the wheel 40 having the required number of grooves are used. The drive wheel 39 is fixed to a drive shaft 42 which is rotated by a motor capable of rotating in the normal and reverse directions.

The lifting table 25 of each of the right suspension ropes 37
Rods 46 are connected to the end on the side, and these rods 46 are fitted on the upper wall 49 of the bracket portion 48 of the elevating table 25 so as to be able to move up and down. In addition, the rod 46 is a lifting piece 50.
It is also fitted so that it can be raised and lowered. The elevating piece 50 is movable up and down (movable up and down) with respect to the bracket portion 48, and normally contacts the lower surface of the upper wall 49. The spring 52 for urging the rod 46 and the hanging rope 37 downward is normally compressed between the lifting piece 50 and the dog 51 provided at the lower end of the rod 46 (complete compression or compression capable of further contraction). It is intervening in the state. Then, when the suspension rope 37 extends by the set amount, that is, when the rod 46 descends relative to the lift table 25 by the set amount, the limit switch 54 has a positional relationship such that the contact is disengaged from the dog 51. It is provided on the lift 25. When the contact of the limit switch 54 is disengaged from the dog 51, an alarm such as a buzzer / lamp lighting is issued. With such a configuration, when any one of the suspension ropes 37 of the required book is extended by the set amount, the limit switch 54 corresponding to the extended suspension ropes 37 is actuated, and the worker is tuned to turn on the buzzer / lamp or the like. An alarm is issued. Based on the alarm, the worker performs work to reduce the extension of the suspension rope 37. Although detailed description and illustration are omitted, each of the left suspension ropes 37 also has the same structure as described above.

On the right side of the elevator 25, the guide rail 3
3 is provided with a pair of front and rear guide pieces 57 each having a downwardly extending tapered surface 57a that faces each other in a front-rear direction. These rollers 58 are rotatably attached to the tip (upper end) of a swing lever 59 that can swing back and forth.
The swing lever 59 is pivotally attached to the lifting piece 60. The elevating piece 60 is vertically guided by a guide rod 62 provided on the elevating table 25 and is urged upward by a spring 63. The elevating piece 60 and the elevating piece 50 with the rod 46 fitted therein are linked by a chain 64, and the chain 64 is hung on two wheels 65. Then, with the lifting piece 50 hitting the upper wall 49, the lifting piece 60, and thus the roller 58, is lowered downward, that is, in a position where it does not hit the guide rail 33. In this state, the lower tip portion 59a of the swing lever 59 is fitted into the recess of the receiver 67 fixed to the lift 25 so that the swing lever 59 does not swing and maintains the vertical state. It is made like a whole. Although detailed description and illustration are omitted, the left side of the lift 25 also has the same structure as described above. With such a configuration, when all the right and left suspension ropes 37 are cut, the lifting piece 50 becomes free, so the lifting piece 60 is pushed up by the force of the spring 63, and the lifting table 25 tries to descend. The free roller 58 abuts on the tapered surface 57a of the guide piece 57, and the pair of rollers 58 are brought closer to each other by the action of the tapered surface 57a spreading downward to sandwich the guide rail 33. As a result, the elevator table 25 is prevented from falling further. In that state, that is, when the lifting piece 60 rises with respect to the lifting table 25, the limit switch 68 from the lifting piece 60 (see FIG. 8).
The contactor is detached, and its operation causes an alarm such as buzzer / lamp lighting. Also, all the right side or all the left side hanging ropes 37
When is cut, the elevator 25
Is prevented from falling.

An opening 26 through which the turntable 21 passes is formed in the horizontal portion 25a of the lift table 25. A pair of left and right slide forks 27 that operate in synchronization are provided on the left and right portions of the horizontal portion 25a so as not to block the opening 26 and horizontally projectable in either the front or rear direction by a known sliding mechanism. ing. Needless to say, the pallet P has a size to be mounted on the lift table 25. The slide fork 27 causes the pallet P on the car storage rack 8 to project downward, lift the pallet P by raising the lift table 25, and retract the pallet P to the lift table 25 side. Then, the pallet P can be lowered onto the car storage rack 8 by the reverse operation. As is apparent from this description, the height of the car storage portion of the car storage rack 8 is the height of the car 1 for the transfer operation of the pallet P to the car storage rack 8 and the thickness of the pallet P. And allowance (play) is taken into consideration. It should be noted that if a so-called push-pull mechanism that clamps the pallet P and pushes or pulls the pallet P is used as the vehicle transfer device, the pallet P can be delivered to the vehicle storage rack 8 for operation. Since the height of the vehicle storage shelf 8 is not required, the vertical interval of the car storage rack 8 can be reduced. Needless to say, the slide fork 27 does not collide with or interfere with the pallet support bar 7, the turntable 21, or the like.

[0014]

Operation of the Embodiment Next, the operation of the embodiment will be described. First,
The case of parking will be described. When the parking start signal is issued, the following operation is automatically performed. The elevating table 25 moves up and down toward the car storage rack 8 having an empty pallet P, and stops when the upper surface of the slide fork 27 is located slightly below the lower surface of the pallet P. Then, the slide fork 27 projects to the lower surface of the pallet P. After that, the slide fork 27 lifts the pallet P by raising the lift table 25 slightly. Then, the slide fork 27 retracts, so that the pallet P is placed on the lift table 25. After that, the elevating table 25 descends and reaches the lowest position where the upper surface of the slide fork 27 is flush with or slightly lower than the upper surface of the floor 15. At that time, since the turntable 21 is fitted in the opening 26, that is, in a state where the longitudinal direction is directed in the left-right direction and is in a raised state, the pallet P is automatically transferred from the slide fork 27 to the turntable 21. Transfer to. After that, the turntable 21 horizontally turns 90 degrees, and the longitudinal direction of the pallet P, which has been oriented in the left-right direction, is oriented in the front-rear direction. After that, the turntable 21 descends to place the pallet P on the floor 1.
It is in a state of being placed on 5. Then, the car 1 is placed on the pallet P through the loading / unloading port. After that, the pallet P on which the vehicle 1 is placed can be stored in the vehicle storage rack 8 by performing the operation substantially opposite to the above. And by the operation almost opposite to the above,
Car 1 can be put out. It is needless to say that the front side of the car 1 is directed to the entrance / exit port when leaving the warehouse. The ordinary passenger car 1A is parked on the ordinary passenger car shelf 8A, and the high-roof vehicle 1B is parked on the high-roof vehicle shelf 8A.
Parked at B.

[0015]

The present invention has the following effects due to the above-mentioned configuration. When any one of the hanging ropes extends by a set amount, the fact can be known by activating a detector corresponding to the extended hanging rope.

[Brief description of drawings]

FIG. 1 is a horizontal sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is an enlarged view of part A of FIG.

4 is a sectional view taken along line IV-IV of FIG.

FIG. 5 is a perspective view showing a connected state of a lift and a counterweight.

6 is an enlarged cross-sectional view taken along line VI-VI of FIG.

7 is an enlarged sectional view taken along line VII-VII in FIG.

8 is a sectional view taken along line VIII-VIII in FIG.

9 is an enlarged cross-sectional view taken along line IX-IX of FIG.

[Explanation of symbols]

 25 Lifting platform 37 Suspended rope 46 Rod 52 Spring 54 Limit switch

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[Procedure amendment]

[Submission date] July 27, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

On the right side of the elevator 25, the guide rail 2
4 is provided with a pair of front and rear guide pieces 57 each having a downwardly widening tapered surface 57a facing each other in front of and behind each other. These rollers 58 are rotatably attached to the tip (upper end) of a swing lever 59 that can swing back and forth.
The swing lever 59 is pivotally attached to the lifting piece 60. The elevating piece 60 is vertically guided by a guide rod 62 provided on the elevating table 25 and is urged upward by a spring 63. The elevating piece 60 and the elevating piece 50 with the rod 46 fitted therein are linked by a chain 64, and the chain 64 is hung on two wheels 65. Then, with the lifting piece 50 abutting on the upper wall 49, the lifting piece 60, and by extension, the roller 58, is in a state of being lowered to the lower side, that is, a position where it does not hit the guide rail 24 . In this state, the lower tip portion 59a of the swing lever 59 is fitted into the recess of the receiver 67 fixed to the lift 25 so that the swing lever 59 does not swing and maintains the vertical state. It is made like a whole. Although detailed description and illustration are omitted, the left side of the lift 25 also has the same structure as described above. With this configuration, when all the right and left suspension ropes 37 are cut, the lifting piece 50 becomes free, so that the force of the spring 63 pushes up the lifting piece 60 and lowers the lifting table 25. Therefore, the free roller 58 abuts on the tapered surface 57a of the guide piece 57, and the pair of rollers 58 are brought closer to each other by the action of the downwardly expanding tapered surface 57a to sandwich the guide rail 24 . As a result, the elevator table 25 is prevented from falling further. In that state, that is, when the lifting piece 60 rises with respect to the lifting table 25, the limit switch 68 from the lifting piece 60 (see FIG. 8).
The contactor is detached, and its operation causes an alarm such as buzzer / lamp lighting. Also, all the right side or all the left side hanging ropes 37
When is cut, the elevator 25
Is prevented from falling.

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

[Figure 6]

Claims (1)

[Claims] 1. An elevating table, wherein the elevating table is suspended by at least two suspending cables, the lifting cable is vertically movably connected to the elevating table, and is biased downward by a spring or the like. An elevating platform extension detecting device for a lifting rope, which is provided with a detector for detecting relative movement between the lifting rope and the lifting rope.