JP3055959B2 - Lock mechanism for lifting pallets in parking equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock mechanism for preventing a lifting pallet from dropping in a two-stage lifting parking device having an upper pallet that can be raised and lowered.

[0002]

2. Description of the Related Art As a conventional parking device, there is known a two-stage vertical traverse type parking device having an upper pallet which can be raised and lowered and a lower pallet which can be traversed and which stores a plurality of automobiles.

Further, a device for preventing the lifting pallet from dropping is also known as disclosed in Japanese Patent Application Laid-Open No. 1-203568.

The above-described known fall prevention device is mounted on auxiliary columns arranged at four corners of an elevating passage of the elevating pallet, and a lock lever projects from the auxiliary column into the elevating passage of the elevating pallet to prevent the elevating pallet from descending. Is what you do. The operation of the lock lever is performed by a solenoid switch.

[0005]

The above-mentioned conventional fall prevention device must be provided independently for each lifting pallet, which is an obstacle to downsizing the parking device. In addition, since the lock lever is driven by a solenoid switch, the operating noise is loud when quiet, and noise is generated.

[0006]

The present invention locks a suspension mechanism of a lifting pallet, and a threaded rod is passed through a hole at an upper end of a bracket fixed to the lifting pallet. However, when the suspension mechanism is a two-point support, such as the suspension mechanism of a parking device filed for utility model registration on December 26, 1990, only a small number of lock mechanisms are required, and the lifting pallets on both sides must be the same. Locking with a threaded rod can further reduce the number of locking mechanisms, making it ideal for downsizing parking devices.

Further, since the driving of the threaded rod can be performed by a small electric motor, the operation noise is extremely small and no noise is generated.

[0008]

FIG. 1 shows a side view of a parking device. A front support 1 is provided on the side of the entrance, and a rear support 2 is provided on the rear, and an upper beam 3 extends between upper portions thereof. A lowered lifting pallet 4 is located on the base, and a bracket 5 having a lower end fixed to the pallet stands upright on both sides, and a threaded rod is mounted on the upper end of this bracket.
13 through holes (lock holes) 6 are provided, and a hoisting chain 7 of the suspension mechanism is further connected thereto. The upper beam 3 is equipped with a lock mechanism 8. 2 and 3 show:
The lock mechanism 8 is shown in an enlarged manner.

FIG. 2 shows a side view of the lock mechanism 8, and a pedestal screw 9 fixed to the device is rotated by a belt 12 hung between the pedestal screw 9 and a driving pulley 11 of the electric motor 10 for locking. A threaded rod 13 having a screw on the outside that engages with the inner screw of the pedestal screw is fitted into the pedestal screw 9. This threaded rod 13
Is flat or grooved on one side, and is prevented from rotating by a threaded rod guide key 14 which comes into contact with the flat surface or groove. Therefore, when the pedestal screw 9 is rotated by the electric motor 10 for locking, the inner screw of the pedestal screw and the lock screw 13 are engaged, and the rotation of the threaded rod 13 is prevented by the threaded rod guide key 14. Therefore, the threaded rod 13 slides with the rotation of the pedestal screw. Then, it passes through the lock hole 6 of the bracket 5.

Reference numeral 15 denotes a position detection sensor for detecting the slide position of the threaded rod.

FIG. 3 shows a front view of the lock mechanism 8.

The lock mechanism 8 is located between the adjacent pallets, and the lock holes 6a, 6b of the adjacent brackets 5a, 5b of each lift pallet when the lift pallet is at the lift limit position.
Both ends of the threaded rod 13 penetrate through both of them to lock both. This is because the threaded rod 13 is in the center neutral position (N).

In order to unlock the right lifting pallet in the figure, the threaded rod 13 slides through the lock hole 6a of the bracket 5a to the position (L) indicated by the dotted line on the left side, and slides. The right end similarly moves to the position (R1) indicated by the dotted line, escapes from the lock hole 6b of the right bracket 5b, and unlocks the right lifting pallet. Conversely, when the lock of the left lifting pallet is to be released, the threaded rod 13 slides to the position (R) shown by the dashed line on the right, and the left end of this rod with thread is moved to the position (L1) shown by the dashed line. ) To unlock the left pallet. The position detecting sensor 15 is disposed at a position (R1) or (L1) at each end of the position where the threaded rod 13 slides to the right or left, and performs position detection.

Next, the operation of the entire apparatus will be described. If it is desired to lower the elevating pallet in the upper stage, first, when the lowering button is pressed, it is determined whether or not a pallet exists in the lower stage. After the pallet is traversed and the limit switch detects the completion of the traverse, the electric motor 10 for locking the upper pallet is activated, the pedestal screw 9 is rotated, and the threaded rod 13 is slid to release the lock. After confirming that the left / right lock of the lifting pallet to be lowered by the position detection sensor 12 is in the release position,
The lifting pallet is lowered to a predetermined position. If the position detection sensor determines that the left / right lock has not been released, an abnormal alarm is issued, and the entire apparatus is emergency stopped.

[0015]

According to the lock mechanism of the present invention, since the screw is penetrated from the side into the lock hole of the bracket of the lifting pallet, it is simultaneously passed through the lock hole of the bracket of two adjacent lifting pallets. Since the locking can be performed simultaneously, the number of locking mechanisms can be greatly reduced, which is effective in reducing the size of the entire parking device.

Also, since the driving of the lock mechanism is sufficient with a small electric motor, unlike the conventional solenoid switch, the operating noise is small and no noise is generated.

[Brief description of the drawings]

FIG. 1 is a side view of a parking device.

FIG. 2 is a side view of a lock mechanism.

FIG. 3 is a front view of a lock mechanism.

[Explanation of symbols]

 4 Lifting pallet 5 Bracket 6 Lock hole 7 Hoisting chain 8 Lock mechanism 9 Pedestal screw 10 Electric motor for locking 13 Rod with thread 14 Rod guide key with thread 15 Position detection sensor

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04H 6/06

Claims (1)

(57) [Claims] 1. A parking device having a vertically movable upper pallet, wherein a lock hole for a threaded rod is provided at an upper end of a bracket fixed to the pallet connected to the suspension mechanism, and the device is mounted at a rising limit position of the pallet. A threaded rod slidably fixed to the pallet at the center position between the adjacent lifting pallets, simultaneously penetrates and engages both locking holes of the adjacent bracket, and slides the threaded rod to the left and right. The lifting mechanism of the lifting pallet is adapted to release the engagement with the locking hole of one bracket.