JPH041251Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a pallet fall prevention device that prevents pallets carrying cars from falling in a two-level parking lot where two cars are stored and parked one above the other. It is.

BACKGROUND TECHNOLOGY A conventional pallet fall prevention device for a two-tiered parking lot, for example, as shown in Japanese Patent Laid-Open No. 61-204475, when a pallet carrying a car rises to the top, the aggregate supporting the pallet is Below the bottom surface,
It has been known to support the aggregate by protruding receivers provided in the pillars to prevent the pallets from falling.

Problems that the invention aims to solve: However, the above-mentioned fall prevention device prevents the pallet from falling only when it is located at the highest level, and the chain may break during lifting or lowering, or the motor may idle and the pallet may fall. In such cases, the problem is that there is no way to prevent this.

SUMMARY OF THE INVENTION Therefore, the object of the present invention is to provide a pallet fall prevention device which can solve the above-mentioned problems and prevent pallets from falling not only from the top level but also during elevation.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention inserts the end of the aggregate 6 that supports the pallet 2 into the groove 10 of the support column 4, and connects the chain 5 thereto. In a two-tiered parking lot where the chain 5 is hoisted up and lowered by a motor 7 to raise and lower the pallet 2 along the pillar 4, the concave groove 1 of the pillar 4
A rail 8 is fixed and suspended inside the frame 0, and the end of the aggregate 6 and the chain 5 are connected via a case 12.
Cam plates 16, 16 are provided to clamp the rail 8 from both sides when the suspension force of the pallet decreases, so that the pallet will not fall due to a failure at the top or during elevation. .

Embodiments Hereinafter, embodiments of the pallet fall prevention device of the present invention will be described based on the drawings.

The pallet fall prevention device (hereinafter referred to as the device) 1 of the present invention is a two-stage parking system in which a car 3 is placed on a pallet 2 and raised, and the cars are parked above and below, respectively, as shown in Fig. 10. At the car lot,
An aggregate 6 supporting the pallet 2 which is moved up and down by a chain 5 inside the pillars 4 erected at its four corners.
It is installed in the chain 5 and clamps the rail 8 suspended in the support column 4 when an abnormality occurs in the electric motor 7 that operates the chain 5, the chain 5, etc. and the suspension force of the chain 5 suddenly decreases. The pallet 2 on which the automobile 3 is placed is prevented from falling by stopping the pallet 2.

Figures 1 to 4 show the details of this device.The device 1 is a case 12, which is attached by bolts to the upper end of the aggregate 6 suspended horizontally on the lower surface of the pallet 2. Guide rolls 13 are attached to the top of the case 12 on the left and right sides, and when the device moves up and down in the groove 10 of the support 4, it comes into contact with the inwardly bent end 11 of the support 4. 1 and aggregate 6
Two rotating shafts 14, 14 are rotatably supported within the case 12, and one end protrudes to the outside as shown in FIGS. 3 and 4. A guide roll 15 is loosely fitted and a cam plate 16 is fixed. Guide roll 15
The cam plate 16 is guided by a rail 8 that is attached to a horizontal member 9 horizontally suspended in the middle of the two-tier parking lot by a first bracket 32 and a second bracket 33 so as to be able to swing back and forth and left and right, ensuring the clamping action of the cam plate 16. It is becoming more and more like this. Further, the cam plate 16 is eccentrically fixed to the rotating shaft 14 as shown in FIGS. 6 and 8.
Under normal conditions, it is arranged to maintain a constant distance from the rail 8 as shown in FIG. 6, and in an emergency, the rotating shaft 14 is rotated in the direction of the arrow as shown in FIG. 8 by a tension spring 18, which will be described later. The rail 8 is held between the left and right sides by the cam plates 16, and the apparatus 1 and the aggregate 6 are stopped to prevent the pallet 2 from falling. By the way, the two rotating shafts 1
As shown in FIGS. 1 and 9, pins 17 and 17 are attached to the pins 4 and 14, and a tension spring 18 is tensioned on these pins to rotate the rotation shafts 14 and 14 in the direction of the arrow in FIG. It is constantly energized. Also case 12
A notch 19 is formed in the inner rotating shaft 14 as shown in FIGS. 7 and 9, and when the locking body 20 disposed below is raised as shown in FIG. Both ends of 20 have both notches 19, 19
The rotating shafts 14, 14 are engaged with each other to prevent them from rotating. When the locking body 20 is lowered as shown in FIG.
The cam plate 16 is rotated by the urging force of the cam plate 16, so that the cam plate 16 is also rotated to sandwich the rail 8 from the left and right sides.

In addition, a rod 24 for suspending the aggregate 6 connected to the chain 5 and the connector 23 is inserted into the case 12, and this rod 24 extends to the aggregate 6 below and is provided at the bottom of the aggregate 6. hole 2
It has become more prominent than 5. A compression spring 29 is inserted between the stepped portion 27 at the lower end of the rod 24 and the upper inner side of the aggregate 6 and the cover 28 via a collar 30, so that when the chain 5 moves up and down, Compression spring 29 is compressed by the lower end of rod 24.
It is configured to move up and down while supporting the aggregate 6 through.

Next, the operating mechanism of the locking body 20 will be explained. The locking body 20 is operated by a compression spring 21 that presses from above.
It is always urged downward by a stopper 22 at the bottom to maintain the locking position. As shown in FIG. 4, the stopper 22 is in contact with a disk 31 through the upper surface of the aggregate 6, and the disk 31 is inserted through the rod 24, its lower end is locked to the stepped portion 27, and the disk 31 is pressed by the compression spring 29. The upper end of the collar 30 is in contact with the upper end of the collar 30. When a car 3 is placed on the pallet 2, the aggregate 6 supporting the pallet 2 is lifted by the rod 24, so the compression spring 29 is compressed, and the collar 30, which is locked to the step 27 of the rod 24, is The disc 31 was pressed, the stopper 22 was pushed upward, the locking body 20 was fitted into the notch 19 of the rotating shaft 14, and the locked state was maintained, and the hanging force of the chain 5 was rapidly reduced. At times, the rod 24 is moved downward by the biasing force of the compression spring 29, and the collar 30 is also moved downward, so that the disc 31 can move freely, and therefore the stopper 22 that comes into contact with the disc 31 can also move freely. , the locking body 20 is pushed down by the compression spring 21, and the notch 19 of the rotating shaft 14 and the locking body 20 are disengaged from each other. The rotation shaft 14 is moved to the eighth position by a tension spring 18.
The pallet 2 is rotated in the direction of the arrow in the figure, and the cam plates 16, 16 clamp the rail 8 from both sides to bring the pallet 2 to a sudden stop. When the pallet 2 is at the lowest position, the bottom plate 26 provided at the bottom of the aggregate 6 touches the lowest surface of the parking lot and the pallet 2 stops, so the tip of the rod 24 touches the lowest surface of the parking lot. The rotating shaft 1 is in a state where it does not protrude from the hole in the bottom plate 26 as shown in FIG.
4 and the locking body 20 maintain a locked state. Therefore, even if the pallet 2 is at the lowest position and the automobile is not riding, the locking state between the rotating shaft 14 and the locking body 20 will not come off.

Effects of the invention The present invention has the above-mentioned structure, and when the suspension force of the chain suddenly decreases, the rail fixed in the groove of the support is held between the cam plates to prevent the pallet from falling. Therefore, when the suspension force of the chain suddenly decreases, even when the pallet is at the highest level or while it is being raised or lowered, the cam plate can clamp the rail and reliably prevent the pallet from falling. , has very good practical effects.

[Brief explanation of the drawing]

Fig. 1 is a front view of the pallet fall prevention device of the present invention, Fig. 2 is a vertical sectional view, Fig. 3 is a plan view, Fig. 4 is an enlarged sectional view of the main parts, and Fig. 5 is a locking body. FIG. 6 is a cross-sectional view of the locked state between the rail and the rotating shaft, FIG. 6 is a diagram showing the relationship between the rail and the cam plate in the locked state, and FIG.
The figure is a cross-sectional view of the locking body and the rotating shaft when the lock is released, Figure 8 is a diagram showing the relationship between the rail and the cam plate when the lock is released, and Figure 9 is the locking body and the rotating shaft. FIG. 10 is a side view of the entire two-tiered parking lot. 1... Pallet fall prevention device, 2... Pallet, 4... Support, 5... Chain, 6... Aggregate,
8... Rail, 12... Case, 14... Rotating shaft, 16... Cam plate, 20... Locking body.

Claims (1)

[Scope of utility model registration request] The end of the aggregate 6 that supports the pallet 2 is inserted into the groove 10 of the column 4, the chain 5 is connected to this, and the pallet 2 is raised and lowered along the column 4 by being hoisted up and lowered by the motor 7. In the two-tiered parking lot, the rail 8 is fixed in the groove 10 of the pillar 4, the end of the aggregate 6 and the chain 5 are connected via the case 12, and A pallet fall prevention device for a two-level parking lot, characterized in that cam plates 16, 16 are provided to sandwich the rail 8 from both sides when the hanging force of the chain 5 decreases.