JPH0411088Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a pallet lifting chain that automatically and instantly senses the breakage and fixes the pallet when the chain lifting the pallet breaks in a second-floor parking lot. This relates to a cutting sensing fixing device.

(Prior Art) There is no conventional cutting sensing fixing device for pallet lifting chains in this type of second-floor parking.

(Problems to be solved by the invention) Since the purpose of second-floor parking is to store cars in two levels, upper and lower, cars are placed on pallets and hoisted to the upper level.

By the way, most of the conventional structures of this type of second-floor parking that use chains to lift pallets utilize chain wheels and guide rollers, so when a car is placed on a pallet and lifted by a chain, However, there is a problem in that there is a risk that the chain may break due to some reason, such as an unexpected weight being applied to the chain, causing the pallet or the vehicle to fall.

(Means for solving the problem) Therefore, in order to solve the above problem, this invention provides holding rods 1 on both sides of the parking frame a of the second floor parking, and pallets 2 on the upper part of both sides. A hanging rod 4 to which one end of the lifting chain 3 is attached is provided so as to be movable up and down, a pressing plate 5 is attached to the hanging rod 4, the pressing plate 5 is pressed upward by a spring 6, and a downward movement corresponding to the pressing plate 5 is provided. A switch 7 that is turned off when the pressing plate 5 is raised is provided, and a switch 7 is provided that is placed in the parking frame a and is placed between the middle supports 13 on both sides of the pallet 2 and the bearings 15 and 16 at the rear of the pallet 2, which is lifted by the drive of the chain 3. is rotatably installed, and the support 13 of the shaft rod 17 has a through hole 18 suitably larger than the diameter of the holding rod 1 in the middle part.
The proximal end of the fixing plate 19 is opened so that the through hole 18 fits loosely into the holding rod 1, and the arm rod 20 facing downward is provided at the rear.
are fixed respectively, and the shaft rod 17 is pressed so that the fixing plate 19 rotates upward by the spring 21 fitted to the shaft rod 17, and when the rear middle part of the pallet 2 is energized, the operating rods on both sides are 24, and connect the solenoid 9 and the arm rods 20 on both sides by the operating rods 24, and connect the drive motor 8 of the chain 3, the switch 7, and the solenoid 9.
An electric circuit is formed in the 2nd floor parking area to form a disconnection sensing and fixing device for the pallet lifting chain in the second floor parking lot.

(Function) When the chain 3 is cut, the load that was pulling the hanging rod 4 downward is lost, the pressure plate 5 rises due to the elasticity of the spring 6, the switch 7 is turned off, and the motor 8
And the power supply to the solenoid 9 is stopped.

Therefore, at the same time as the motor 8 stops, the power supply to the solenoid 9 stops, and the springs 21 on both sides
Due to the elasticity of the fixing plate 19, the fixing plate 19 rotates upward using the pivot rod 17 as a fulcrum, and the inner and outer edges of the through hole 18 of the fixing plate 19 come into pressure contact with the holding rod 1. is fixed to the holding rod 1 to prevent the pallet 2 from falling.

(Embodiment) To explain the structure of an embodiment of this invention shown in the drawings, a indicates a parking frame of the second floor parking, and 10 indicates a parking frame a.
A holding rod 1 made of soft steel is erected at the middle part of the side frame 10. 2 is a pallet to be lifted, and 3 is a chain for lifting the pallet 2.

c indicates a cutting sensing device for the chain 3; 11 is an upwardly open sensing box provided on the front end of the side frame 10; 4;
5 is a hanging rod, and 5 is a pressing plate placed on the sensing box 11. The hanging rod 4 is inserted into the upper wall of the side frame 10 and the through hole of the pressing plate 5 so as to be movable up and down, and the hanging rod 4 protrudes upward. A double nut stopper 12 screwed onto the screw is provided at the end, and a spring 6 fitted to the hanging rod 4 is interposed between the side frame 10 and the pressing plate 5. 7
is a switch housed in the sensing box 11.

b indicates a fixing device for the pallet 2; 13 is a receiver fixed to the middle part of both sides of the pallet 2; 14 is an arm protruding from the rear of the pallet 2; A shaft rod 17 is rotatably installed across the bearings 15 and 16 of 14, and the shaft rod 1
7, the base end of a fixing plate 19 made of hard steel with a through hole 18 suitably larger than the diameter of the holding rod 1 is provided in the intermediate part, and the arm rod 20 pointing downward is attached to the rear end. The fixing plate 19 is fixed by a spring 21 and the shaft rod 17 is fitted to the front part of the spring 21.
Press so that it rotates upward. Reference numeral 22 denotes a guide plate fixed to the receiver 13 below the fixing plate 19 in a corresponding manner, and a through hole 23 is formed in the middle part of the guide plate.
9 is a solenoid attached to the middle part of the rear surface of the pallet 2, and the arm rods 20 on both sides are connected to the operating rod 2.
Connect by 4.

Reference numeral 25 denotes a chain wheel pivotally supported at the intermediate portion on both sides of the pallet 2, 26 and 27 a chain wheel and a guide wheel rotatably supported on the arms 14 on both sides, respectively;
Guide rollers 8 and 29 are pivotally supported at the front and back of the upper end of the side frame 10, and 30 is a main shaft rotatably installed at the rear lower part of the parking frame a, and chain wheels 31 are attached to both sides of the main shaft. 32 is a stopper provided at the rear lower end of the side frame 10. Therefore, on both sides, the fixing plate 19 of the pallet 2 and the through holes 18, 23 of the guide plate 22 are fitted into the holding rod 1, and the third
As shown in the figure, the guide ring 27 is fitted into the groove of the rear column of the side frame 10, both ends of the chain 3 are fixed to the hanging rod 4 and the stopper 32, and the chain 3 is successively connected to the chain wheel 2.
The pallet 2 is suspended from the parking frame a by a chain 3, which extends from below the guide rollers 28 and 29, below the chain wheel 31, and above the chain wheel 26.

Reference numeral 8 denotes a forward/reverse rotating motor installed at the rear of one side of the parking frame a. Reference numeral 33 denotes a reducer installed below the motor 8. The drive shaft of the motor 8 and the input shaft of the reducer 33 are reduced by a chain transmission mechanism 34. machine 33
The output shaft and the main shaft 30 are respectively connected by a chain transmission mechanism 35. Thus, an electric circuit is formed between the switch 7, the motor 8, and the solenoid 9.

A is a car that has entered pallet 2.

Next, its effect will be explained. Normally, the chain 3 is tensed due to the weight of the pallet 2, and the hanging rod 4 is pulled downward, and as shown in FIG.
is supported. At this time, the switch 7 is turned on to energize the motor 8 and the solenoid 9, and the solenoid 9 pulls the operating rods 24 on both sides inward, and the shaft rod 17 with the fixing plate 19 resists the elasticity of the spring 21 as shown in FIG. Rotate clockwise, and the fixing plate 1
9 is in a horizontal state as shown in FIG. 8, and the through hole 18 of the fixing plate 19 is loosely fitted into the holding rod 1.

Therefore, if the motor 8 is rotated in the forward direction, the power transmission mechanism 34, reduction gear 33, and transmission mechanism 35 are connected from the driving shaft to the drive shaft.
As the main shaft 30 rotates in the forward direction, the chain wheels 31 on both sides drive the chain 3 in the direction of the arrow in FIG. is lifted up.

On the other hand, when the motor 8 is rotated in the opposite direction while the pallet 2 is being lifted up, the pallet 2 is lowered by operating in the opposite direction.

Therefore, if for some reason, chain 3
When the chain 3 is cut, the hanging rod 4 loses its downward load at the same time as the chain 3 is cut.
The pressure plate 5 is lifted by the elasticity of the spring 6 and the switch 7 is turned off, stopping the power supply to the motor 8 and solenoid 9. Therefore, when the motor 8 stops, the shaft rod 17 on both sides rotates in the direction of the arrow shown in FIG. Rotates upward using the rod 17 as a fulcrum,
When the downward force due to the weight of the pallet 2 is applied to the fixing plate 19, the inner and outer edges of the through hole 18 of the fixing plate 19 bite into the holding rod 1, which has a low hardness, and press against the fixing plate 19.
is fixed to the holding rod 1, and the pallet 2 is supported by the holding rod 1 by fixing plates 19 on both sides thereof to prevent it from falling.

After that, when the chain 3 is repaired, the pressing plate 5 resists the elasticity of the spring 6 and lowers it to descend, thereby pressing the switch 7, which is turned on and the motor 8 and solenoid 9 are turned on. Turn on electricity. Therefore, when the motor 8 is rotated in the forward direction and the pallet 2 is slightly lifted, the holding rod 1 of the fixed plate 19
Since the pressure is released, the solenoid 9 pulls the operating rods 24 on both sides inward, and the shaft rod 17 resists the elasticity of the spring 21 via the arm rod 20 and moves to the ninth position.
Rotating in the direction opposite to the arrow in the figure, the fixing plate 19 attached to the shaft rod 17 returns to the horizontal state as shown in FIG. The fixation by the plate 19 is released. Therefore,
Thereafter, the pallet 2 can be moved up and down.

(Effects of the invention) The cutting sensing and fixing device for a pallet lifting chain in a second-floor parking lot of this invention has the following remarkable effects.

(1) If the chain that lifts the pallet breaks for some reason, at the same time as the chain breaks, the lifting rod loses its downward pull and the pressure plate is lifted by the elasticity of the spring. When the switch is turned off, the drive motor of the chain stops, and the electricity to the pallet solenoid is stopped, and on both sides of the pallet,
The fixing plate of the shaft rod attached to the pallet is rotated upward by the elasticity of the spring, and the inner and outer edges of the through hole of the fixing plate come into pressure contact with the holding rod, and the pallet is fixed to the holding rod by the fixing plate. . Therefore,
When a chain breakage occurs, it is automatically detected instantly and the pallet is fixed immediately.
Pallets and cars are prevented from falling and are safe.

(2) Operation is smooth and accurate.

(3) The structure is simple, small and compact, and can be manufactured easily and inexpensively.

[Brief explanation of the drawing]

Fig. 1 is a side view of a second-floor parking lot according to an embodiment of this invention, Fig. 2 is a plan cross-sectional view, Fig. 3 is a side view of its pallet lifting section, and Fig. 4 is an enlarged view of the cutting sensing section of the same chain. 5 is a side sectional view, FIG. 5 is a perspective view of the pallet fixing device, FIG. 6 is a rear view, and FIG.
The figure is an enlarged plan view of the fixing part, showing its normal state. Figures 8 and 9 are front sectional views of the same as above;
FIG. 8 shows the normal state, and FIG. 9 shows the state when the chain is cut. a...Parking frame, b...Fixing device,
c... Chain cutting sensing device, 1... Holding rod, 2
...Pallet, 3...Chain, 4...Hanging rod, 5
... Pressing plate, 6 ... Spring, 7 ... Switch, 8 ... Drive motor, 9 ... Solenoid.

Claims (1)

[Scope of utility model registration request] Install holding rods on both sides of the parking frame,
A hanging rod with one end of a chain for lifting the pallet is attached to the upper part of both sides so as to be movable up and down, a pressing plate is attached to the hanging rod, the pressing plate is pressed upward by a spring, and the lifting rod is moved upwardly and downwardly. A switch is provided below it that turns off when the pressing plate rises, and is placed in the parking frame and rotates the shaft rod by passing it between the intermediate supports on both sides of the pallet to be lifted by the drive of the chain and the rear bearings. A through hole suitably larger than the diameter of the holding rod is formed in the middle part of the receiving part of the shaft rod, and the base end of the fixing plate that fits loosely into the holding rod is inserted into the through hole. , a downwardly directed arm rod is fixed to the rear part of the pallet, and a spring fitted to the shaft rod presses the fixed plate so that it rotates upward, and the arm rod is fixed to the rear middle part of the pallet. A second-floor parking lot is constructed by installing a solenoid that pulls the operating rods on both sides when energized, and connecting the solenoid and the arm rods on both sides with the respective operating rods, forming an electric circuit between the chain drive motor, the switch, and the solenoid. Cutting sensing fixing device for pallet lifting chains in