JPH03260269A - Pallet-dropping-proof device for two-storied parking equipment - Google Patents

Abstract

PURPOSE:To improve a safety degree by connecting the one end of a connecting member to a solenoid to be worked at a pallet descending position with a stopper, and by connecting the other end of the connecting member to an energizing member in the direction for making the other end pivot to a dropping-proof position. CONSTITUTION:When a pallet 2 descends from an upper limit position, then a solenoid SOL is excited, and a movable member 37 slides upward, and a stopper 32 pivots from a dropping-proof position A to a pallet descending position B, resisting a spring 38. After that, when the pallet 2 descends to a lower limit position, then a driving chain 13 is loosened, and a stopping member 21 is moved upward and is brought in contact with a limit switch LSD and it is turned OFF. In this case, a motor M is stopped, and the solenoid SOL is demagnetized. After that, the member 37 slides downward, and the stopper 32 pivots to the dropping-proof position A. As a result, the working of the stopper can be easily confirmed, and a safety degree can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a pallet fall prevention device that prevents a pallet on which a vehicle is placed and which is raised and lowered from falling in a two-level parking system.

(Prior Art) Conventionally, as seen in Japanese Patent Publication No. 62-40497, a pallet fall prevention device for a two-level parking device has been known to prevent claws provided on the pallet from attaching springs when the chain breaks. There is a pallet that prevents the pallet from falling by being rotated toward the support by force, and the claws are locked with locking parts provided on the support.

In addition, as seen in Japanese Patent Publication No. 55-49229, when the lobe is cut, a claw provided on the pallet is rotated by the biasing force of a spring, and the tip of this claw is attached to a ratchet formed on the support. There is a device that prevents the pallet from falling by being locked.

(Problems to be Solved by the Invention) However, the above conventional devices each have the following problems.

First, the one described in Japanese Patent Publication No. 62-40497,
There is a problem in that it is impossible to confirm whether the pawl will operate normally when the chain breaks unless the chain breaks. For this reason, if the pawls or springs are rusted or otherwise inoperable, there is a risk of a serious accident when the chain breaks, which raises concerns about safety. In addition, the operation of the claws can be improved by lifting the pallet with another device such as a shovel to loosen the tension on the chain.
Although it is possible to do so, it is difficult to always do so because this inconvenience is a big loss and takes time.

Further, the device described in Japanese Patent Publication No. 5.5-49229 also had the same problem as above, in that it was impossible to confirm whether the claws were working properly unless the lobes were cut.

(Means for Solving the Problems) The pallet fall prevention device for a two-level parking device of the present invention has columns erected on both sides of the pallet, linear members stretched across the columns and the pallet, and a motor. In the two-stage parking device, the pallet is configured to be able to move up and down along a support via the linear member by rotational drive in forward and reverse directions, and at least one stopper is provided at an appropriate position in the vertical direction of the support. The stopper has a drop prevention position where it protrudes from the support and engages with a locking member fixed to the pallet to prevent the balent from falling, and a fall prevention position where it is recessed into the support and does not engage with the locking member. The pallet lowering position is rotatably provided via a connecting member, and one end of the connecting member is connected to a solenoid that operates the stopper to the pallet lowering position. The end is connected to a biasing member that biases the stopper in a direction to rotate the stopper to the fall prevention position, while an electric contact that detects loosening of the linear member and becomes "broken" is connected in series to the control circuit of the solenoid. is connected to.

(Function) When the pallet is lowered, the stopper operates to the valent lowering position, and when the pallet stops lowering, the stopper operates to the fall prevention position, so that the 7 bar is activated every time a vehicle enters or exits the pallet. i-authentication can be easily performed.

(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

1 and 3 show a two-stage parking device according to the present invention. In this example, for convenience of explanation, the left and right in Figure 2 are referred to as "front and rear", and the left and right in Figure 3 are referred to as "front and rear".
They are called "left and right."

In the figure, reference numeral 1 denotes a support column that supports the pallet 2 in a vertically movable manner, and a total of four columns 1 are erected on the front, rear, left, and right sides of the pallet 2 near the rear.

These struts 1... have a U-shaped cross section, and the left front and rear struts 1.1 and the right front and rear struts 1.1 are parallel to each other so that their respective openings 1a and la face each other. It is located in

The lower ends 1b of each of the pillars 1 are fixed to bases 3, 3 provided on both the left and right sides, and these bases 3, 3 are fixed to the floor by means of fixing means such as anchor bolts (not shown). It is firmly fixed to plane G.

The pallet 2 is used to place the vehicle C on its upper surface, and is formed in a pattern in which the upper surface of the front end is inclined downward toward the front end, so that the vehicle C can be taken in and out smoothly.

Sliders 5, 5 are fixed to the left and right sides of the pallet 2, respectively, so as to be disposed between the front and rear columns 1.1 erected on the left and right sides. At the front and rear of each slider 5.5, guide rollers 6a, 6b are provided which move along the front and rear pillars 1.1.
This allows the pallet 2 to be smoothly moved up and down.

Reference numeral 4 denotes a stopper provided at the rear end of the upper surface of the pallet 2, and the rear wheels of the vehicle C come into contact with this stopper 4, thereby preventing the vehicle C from moving backward during parking.

Further, a motor M is provided on the construction member 10 installed between the right columns 1.1, and a sprocket 12 is integrally provided on the output shaft of the motor M. On the other hand, an operating member 20 is provided on the construction member 15 that is constructed between the columns 1 and 1 on the left side. One end 13a of the drive chain 13 is fixed to this operating member 20, and
The other end 13b of the drive chain 13 is wound around the sprocket 12 via pulleys 16a, 16b, and 16C provided on both left and right sides of the pallet 2, and then hung down.

As a result, the pallet 2 is raised and lowered by letting out the drive chain 13 to the pallet 2 side or pulling it out from the pallet 2 side by the rotation of the motor M, and by this raising and lowering operation, the pallet 2 assumes two upper and lower positions. . That is, when the pallet 2 is at the lower limit position, the vehicle C is allowed to enter the pallet 2, and when the pallet 2 is raised and is at the upper limit position, the vehicle C is allowed to park on the floor surface G below. ing. Note that instead of the drive chain 13, a linear member such as a wire or a rope may be used.

As shown in FIG. 4, the actuating member 20 is configured such that a fastening member 21 that fastens one end 13a of the drive chain 13 is movable vertically by a guide loft 22° 22 via a moving member 25. At the same time, the guide rod 22,
The fixing member 2 is fixed by the springs 23 and 23 inserted in the
1 is always biased upward. And this fastening member 2
Since the driving chain 13 is pulled downward by the weight of the pallet 2, it is normally placed in the position shown in FIG. 4 against the urging force of the spring 23, and the pallet 2 is lowered to the lower limit position. When the drive chain 13 becomes loose or breaks, the spring 2
It moves upward due to the urging force of 3.

In the vicinity of the actuating member 20, there is a fastening member 21 as described above.
A limit switch/7-inch LSD is provided that comes into contact with the moving member 25 and detects when the pallet 2 moves upward, that is, when the pallet 2 reaches the lower limit position or when the drive chain 13 breaks. That is, in the electrical circuit diagram of FIG. 6, this limit switch LSD serves as an electrical contact that detects loosening of the drive chain 13 and becomes "broken."

Furthermore, at the upper end of the left front or right front pillar (in the illustrated example, the right front pillar) l, an abutment member provided at the front upper end of the slider 5 is attached when the pallet 2 reaches the uppermost position. A mint switch LSU is provided which contacts the pallet 26 to detect the upper limit position of the pallet 2.

Furthermore, a pallet fall prevention device 30 is disposed in the vertical direction in the opening 1a of the left rear column 1.

As shown in FIG. 5, the pallet fall prevention device 30 includes three stoppers 32 rotatably supported by a bin 31 in the opening la of the left rear column 1, and these stoppers 32. The stoppers 32 are fixed to the front portions of the bins 31 via connecting members 33a, respectively.
a wire (connecting member) 33 that interlocks the pallet 2; a locking member 35 that protrudes from the rear side of the slider 5 and comes into contact with the stopper 32 to prevent the pallet 2 from falling; and the wire 33
A solenoid SQ is connected to the upper end 33a of the stopper 32 and rotates each stopper 32 simultaneously via the wire 33.
It is composed of L.

The stopper 32... protrudes forward from the opening 1a of the support column 1 around the bottle 31, and has a fall prevention position IA where the locking member 35 locks, and a locking member which rotates toward the opening la side. 3
5 is rotatably supported so as to take a lowered pallet position B where the pallet is not locked. In this example, these stoppers 32 are arranged at the upper part, middle part, and lower part of the support column 1. It is placed in a position where it will not cause serious damage even if it gets caught.

The wire 33 is a movable member 3 whose upper end 33a is slidable up and down by the excitation and demagnetization of the solenoid SOL.
7, and its lower end is fixed to one end of a spring (biasing member) 38. The other end of the spring 38 is fixed to the lower part of the support column 1, so that the wire 33 is constantly pulled downward by the biasing force of the spring 38.

When the solenoid SQL is energized, it slides the movable member 37 upward, thereby rotating the stopper 32 via the wire 33 to the pallet landing position B against the biasing force of the spring 38.

Further, a balance chain (not shown) is stretched between the left and right columns 1 and 1 and between the pallet 2, and is configured to maintain the horizontal state of the pallet 2 when the pallet 2 is raised or lowered.

FIG. 6 shows an electrical circuit diagram.

In Fig. 6, R1, R2, R3, Rx, Ry are relays, rla+, rla, , r2a, r3a, r
xa, , rxa,, rXa=,
rya, .

ryaz, rya are normally "disconnected" relay contacts, rib
is normally a "close" relay contact. UP is an up switch, and DW is a down switch. When these up switch UP and down switch DW are kept pressed, they become "connected" and when released, they become "off." Further, SQL is the aforementioned solenoid, and LSU and LSD are normally "contact" limit switches. ST is a stop switch, M is a motor, Tr is a transformer, B is a brake drive circuit, NFB is an earth leakage breaker, F is a fuse, and SK is a surge killer.

Next, the operation of the pallet fall prevention device of the two-stage parking device configured as above will be explained.

First, a case will be described in which the pallet 2 is raised from the lower limit position where the vehicle C can enter.

By pressing the up switch UP, the relay R1 is energized and the relay contacts rla and rlaz become "contacted" and self-maintained, and the relay Rx is energized and the relay contacts rxa, , rxat.

rxa3 becomes "contact" and motor M rotates in the pallet ascending direction. This causes the drive chain 13 to move to the pallet 2.
The guide roller 6a of the slider 5.5 is pulled out from the side.
, 6b roll along the supports 1..., and the pallet 2 rises while being guided by the supports 1.... Then, when the pallet 2 rises to the upper limit position, the limit switch LS
U comes into contact with the contact member 26 and becomes "disconnected", relay R1
The energization is cut off and the motor M stops. Further, when the stop switch ST is pressed while the pallet 2 is being lifted, the lifting of the pallet 2 is similarly stopped.

When the pallet 2 is raised, the stopper 32 is in the fall prevention position A, so the pallet 2
from below, and passes through this stopper 32 while slightly rotating it toward the pallet lowering position B. In other words, the pallet 2 passes through the stopper 32 while being pushed away from below.

Next, a case where the pallet 2 descends from the upper limit position will be described.

By continuing to press down switch DW, relay R2
is energized and relay contact r2a becomes "contacted". As a result, relay Ry is energized and relay contacts r)'al, r
)'az and ryas become "contact", and the motor M rotates in the opposite direction to the above-mentioned pallet lifting direction. As a result, the drive chain 13 is fed out to the pallet 2 side,
The guide rollers 6a and 6b of the sliders 5 and 5 are the pillars 1...
The pallet 2 rolls downward along the pillars l... and descends while being guided by the supports l... At the start of this descent, relay R3 is energized together with relay R1, so relay contact r3a becomes "contact" and solenoid SQL is energized. When the solenoid SQL is energized, the movable member 37 slides upward and pulls the wire 33 upward, thereby moving the stopper 32 from the fall prevention position A to the pallet lowering position I.
B, it rotates against the biasing force of the spring 38. When the pallet 2 is lowered to the lower limit position, the drive chain 13 is loosened, and the fastening member 21 fixed to one end 13a of the drive chain 13 is moved upward by the spring 23.23. When the fastening member 21 moves upward, the movable member 25 comes into contact with the limit switch LSD and the limit switch LSD is turned off, cutting off the current to the relay R2 and stopping the motor M. The energization is cut off and the solenoid SQL is demagnetized. solenoid s.

When L is demagnetized, the movable member 37 slides downward by the biasing force of the spring 38, thereby rotating the stopper 32 from the pallet lowering position B to the fall prevention position A via the wire 33. Also, when the lowering switch DW is released during the lowering of the pallet 2, or when the stop switch ST is pressed, the lowering of the pallet 2 is similarly stopped, and the stopper 32 is moved from the lower pallet position ilB to the fall prevention position A. Rotate.

In addition, when the drive chain 13 breaks during the lowering of the pallet, the limit switch LSD is turned off in the same way as described above, so the motor M stops and the stopper 32 moves from the pallet lowering position B to the fall prevention position A. Rotate to. Therefore, the pallet 2 is prevented from falling because the locking member 35 locks with the stopper 32 located below the position when the drive chain 13 breaks.

In this way, the stopper 32 operates when the pallet 2 is stopped in the middle of its descent or reaches the lower limit position even if the drive chain 13 does not break, so the user must check the operation of the stopper 32. It can be done easily.

(Effects of the Invention) As described above, according to the valent fall prevention device of the two-tiered parking device of the present invention, the stopper operates between the fall prevention position and the pallet lowering position every time the pallet is raised or lowered. , it can be easily confirmed that the stopper is operating normally, and safety can be improved.

[Brief explanation of drawings]

Fig. 1 is a plan view showing the overall configuration of the two-stage parking device according to the present invention, Fig. 2 is a side view of the same, Fig. 3 is a rear view of the same, and Fig. 4 is a detection of loosening or breakage of the drive chain. FIG. 5 is an enlarged side view showing the actuating member and limit switch, FIG. 5 is an enlarged view showing the fall prevention device, and FIG. 6 is an electric circuit diagram. 1... Support column 2... Pallet 32... Stopper 33... Wire (connecting member) 35... Locking member A... Fall prevention device B... Pallet lowering position SQL... Solenoid

Claims (1)

[Claims] 1) Supports are erected on both sides of the pallet, and a linear member is stretched across the support and the pallet. In a two-stage parking device in which a pallet is configured to be freely raised and lowered along a support, at least one stopper is provided at an appropriate position in the vertical direction of the support, and the stopper protrudes from the support and is fixed to the pallet. It is rotatable via a connecting member to take a fall prevention position where the pallet is prevented from falling by being locked with the locking member, and a lowering position where the pallet is sunk into the support column and is not locked with the locking member. and are provided to interlock with each other, one end of the connecting member being connected to a solenoid that operates the stopper to the pallet lowering position, and the other end of the connecting member biasing the stopper in a direction to rotate the stopper to the fall prevention position. A pallet of a two-stage parking device, characterized in that an electric contact that is connected to a biasing member and turns off when it detects loosening of the linear member is connected in series to a control circuit of the solenoid. Fall protection device.