JPH0713814U - Stretch absorber for lifting rope - Google Patents

Abstract

(57) [Summary] [Purpose] To make it possible to easily absorb the extension of the suspension rope. [Structure] After loosening the lock nut 67, the female screw body 6
By rotating 5, the left threaded rod 63 and the right threaded rod 64 can be brought close to each other to absorb the extension of the suspension rope 37. After the adjustment, the locking nut 67 is tightened again toward the female screw body 65.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a stretch absorber for a lifting rope for a lifting platform.

[0002]

[Prior art]

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

[0003]

[Background of device]

 In the conventional lifting platform suspension device, when one of the suspension cables for suspending the elevator platform is stretched, a heavy load is applied to the suspension cable that is not stretched or the stretched suspension cable is stretched. Since it easily disengages from the wheel on which it is hung, it is necessary to make it easy to absorb the extension of the suspension rope in order to improve the efficiency of maintenance and inspection. This invention was made based on such a request.

[0004]

[Means for achieving the above object]

 This invention adopts the following means in order to achieve the above object. This invention has a threaded rod and an internally threaded body screwed into the threaded rod.

[0005]

[Function of the device]

 This device has the following actions. When the suspension rope extends, at least one of the screw or the female screw body is rotated so that the screw and the female screw body are relatively moved from the current screwed position to the position where the suspension rope is shortened. You can easily absorb the elongation.

[0006]

【Example】

 The present invention will be described below based on an embodiment 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 planar shape and a high height so as to open an elevator passage 12. The rack device 3 includes the left and right main columns 4 of the building 2, the left and right rack columns 5 on the side of the lift passage 12 and the left and right main columns 4 and the same rack columns. 5 and a large number of pallet bearing bars 7 which are passed over at a predetermined interval in the height direction, and the upper surface of the pallet bearing bars 7 on the left side thereof are flush or nearly flush with each other, and the right main support column 4 And a pallet support bar 7 passed to the rack support column 5, and the pallet support bar 7 forming a pair of left and right constitutes a car storage rack 8. Of the whole car 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 made high-shelf car shelves 8B, and the remaining car storage The shelf 8 is an ordinary passenger car shelf 8A. The high-roof vehicle 1B means a vehicle with a high vehicle height of more than 1550 mm and 2000 mm or less, such as a recreational vehicle (RV vehicle) or a light van. An ordinary passenger vehicle 1A is a vehicle with a high vehicle height. Is a passenger car having a diameter of 1550 mm or less. In the following description, the ordinary passenger car rack 8A and the high-roof car rack 8B will be described as the car storage rack 8 unless special distinction has to be made.

On each of the left and right pallet support rails 7, that is, the car storage shelves 8, a rectangular car pallet P that is long in the left-right direction is placed. Vehicle 1 (In the following description, the vehicle 1 is used as a superordinate conception of the ordinary passenger vehicle 1A and the high roof vehicle 1B, and both are described as the vehicle 1 unless it is necessary to distinguish between them. Is placed on a pallet P as will be described in detail later and is parked on a car storage rack 8 (a normal passenger car rack 8A or a high roof car rack 8B).

A storage space 16 is formed above the floor 15 of the building 2, and the vehicle 1 enters the storage space 16 through the front storage port and the storage space 16 passes through the storage space 16. Car 1 is set to leave. An opening 17 is formed in the center of the floor 15 for a lift 25 to be described later to pass through. Further, a pit 18 is formed below the floor 15, a publicly known lifting device 19 is installed at the bottom of the pit 18, and a publicly-known horizontal turning device 20 is installed in a lifting frame of the lifting device 19. A turntable 21 is attached to the rotating body of the horizontal swivel device 20 and has a rectangular shape in plan view and can pass through an opening 26 formed in a horizontal portion 25a of a lifting table 25 described later. With such a configuration, the turntable 21 is vertically movable and horizontally rotatable.

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 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 and 6, the elevating device 31 has a counterweight 34 which is vertically movable along a pair of vertically extending guide rails 33 provided on the left side of the building 2. The upper end of the counterweight 34 is connected to the left and right sides of the lifting table 25, and the ends of the hanging ropes 37 connected as described later. When viewed from the counterweight 34 side, the left and right suspension ropes 37 are hung on the wheel 38, the drive wheel 39, and the wheel 40 in the listed order, and then connected to the lift table 25. The drive wheel 39 is fixed to a drive shaft 42 that is rotated by a motor that can rotate in the normal and reverse directions.

Rods 46 are connected to the end of the right lifting rope 37 on the lift table 25 side, and these rods 46 are fitted to the upper wall 49 of the bracket portion 48 of the lift table 25 so as to be lifted and lowered. ing. Between the upper wall 49 and the dog 51 provided at the lower end of the rod 46, the spring 52 for urging the rod 46 and thus the hanging rope 37 downward is normally compressed (complete compression or further contraction is possible). It is interposed in the compressed state. Then, when the suspension rope 37 extends by a set amount, that is, when the rod 46 descends relative to the lift table 25 by a set amount, the limit switch is positioned so that the contact is disengaged from the dog 51. A switch 54 is provided on the lift table 25. When the contact of the limit switch 54 is disengaged from the dog 51, a warning such as a buzzer / lamp lighting is issued. With such a configuration, when the suspension rope 37 is extended by a set amount, the limit switch 54 is activated, and an alarm such as a buzzer / lamp lighting is issued to the worker. Based on the alarm, the worker works to reduce the extension of the suspension rope 37. Although detailed description and illustration are omitted, the left suspension rope 37 also has the same structure as described above.

An extension absorber 61 is provided at an intermediate part of the end of the suspension rope 37 on the side of the lifting table 25. The stretch absorber 61 includes a left-hand threaded rod 63 provided on the upper suspension rope 37, a right-handed threaded rod 64 provided on the lower suspension rope 37, and a female screw threaded with the left-handed thread rod 63. It has a right-hand threaded rod 64 and an internal thread body 65 having an internal thread to be screwed. A locking nut 67 is screwed onto the left screw rod 63 and the right screw rod 64. With such a configuration, after loosening the locking nut 67, by rotating the female screw body 65, the left threaded rod 63 and the right threaded rod 64 are brought closer to each other to absorb the extension of the suspension rope 37. You can After the adjustment, the locking nut 67 is tightened again toward the female screw body 65. The above-mentioned work is performed after the limit switch 54 is actuated and an alarm such as a buzzer / lamp lighting is issued. It is important that the stretch absorber 61 is provided at a position so as not to get caught around the wheel 38 or the wheel 40 regardless of the position of the lifting table 25. Note that either the left screw rod 63 or the right screw rod 64 may be eliminated, and the remaining left screw rod 63, right screw rod 64, or female screw body 65 may be rotatably provided on the suspension rope 37. . Of course, the stretch absorber 61 may be provided at the end portion on the counterweight 34 side. An extension absorber 61 may be provided at the end of the suspension rope 37.

An opening 26 through which the turntable 21 passes is formed in the horizontal portion 25 a of the lift table 25. Further, 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 to be horizontally projectable in either the front or rear direction by a known sliding mechanism. ing. Needless to say, the pallet P is of a size to be mounted on the lift table 25. The slide fork 27 moves the pallet P on the car storage rack 8 downward, lifts the pallet P by raising the lift table 25, and retreats to the lift table 25 side to raise and lower the pallet P. The pallet P can be lowered onto the car storage rack 8 by retracting the pallet P to the table 25 and performing 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 in addition to the height for the delivery 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. In addition, 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 upper and lower spaces of the car storage rack 8 can be closed. 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 elevator 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. After that, 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 elevating table 25 slightly. After that, 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 the upper surface of the floor 15 or slightly below it. 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. Change. Thereafter, 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 put the pallet P on the floor 15. Then, the car 1 is placed on the pallet P through the loading / unloading port. After that, the pallet P on which the car 1 is placed can be stored in the car storage rack 8 by performing the operation substantially opposite to the above. Then, the vehicle 1 can be put out by an operation which is almost the reverse of the above. It is needless to say that the front side of the car 1 is directed to the entrance / exit opening 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 8B.

[0015]

[Effect of device]

 The present invention has the following effects due to the above-described configuration. To easily absorb the extension of the suspension rope by rotating at least one of the screw or the female screw body so that they both move from the current screwed position to a position that shortens the suspension rope. Can be done.

[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.

[Explanation of symbols]

 25 Lifting platform 37 Suspended rope 61 Stretch absorber 63 Left screw rod 64 Right screw rod 65 Female screw body

Claims (2)

[Scope of utility model registration request] 1. An extension absorber for a lifting rope for suspending an elevator, which is provided at an intermediate part or an end of a suspending rope for suspending an elevator, which comprises a screw rod and a screw fit on the screw rod. Absorber of the lifting platform suspension rope having the internal threaded body. 2. An extension absorber for a lifting platform suspension rope, which is provided at an intermediate part or an end of a suspension rope for suspending an elevator platform, which comprises a right-hand threaded rod and a right-handed thread rod. An extension absorber of a lifting rope for a lifting rope, which has a female threaded body screw-fitted therein and a right-handed threaded screw threaded into the female threaded body and a left-hand threaded rod having the same shaft center.