JPH0127475Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention relates to a mechanism for controlling the elevation of the second floor floor plate of a car carrier.

(b) Conventional technology Conventionally, a second-floor floor plate that can be raised and lowered is provided at the rear of the vehicle body, the floor plate is lowered to load a car onto the same floor plate, and then the same floor plate is raised to load a car onto the second-floor floor plate below the same floor plate. In the car transport vehicle, which can carry cars on two levels (upper and lower), the second floor floor plate is raised and lowered by the power of the car's engine via hydraulic pressure, etc., and all lifting and lowering operations are performed by the worker. This was done through the operation of Additionally, the engine was started and stopped using a switch inside the cabin.

(c) Problems to be solved by the invention Therefore, in order to start and stop the engine, the operator must go in and out of the cabin, and this operation is troublesome, so it is difficult to use the power of the engine during loading work. This has the disadvantage of wasting fuel as the engine is left running when it is not needed, i.e. when the second floor floor plate has finished raising or lowering and is fixed and the car is being loaded. Ta.

(d) Means for solving the problem In this invention, a second floor plate lift switch, a second floor plate position detection switch, and an engine start switch are arranged on the vehicle body, so that the engine can be started from outside the cabin, and the second floor plate position detection switch It is an object of the present invention to provide a second-story floor plate control mechanism for a motor vehicle transport vehicle, which is configured to detect the end of the lifting operation of the second-story floor plate, stop the lifting operation, and stop the engine.

(e) Effect With the above structure, the operator can start the engine from outside the cabin using the engine start switch installed on the vehicle body, and can raise and lower the second floor plate using the second floor plate lift switch.
When the floor plate reaches a predetermined position, the second floor plate position detection switch automatically stops the operation of the second floor plate and the engine rotation, and when the second floor plate is raised and lowered again, the engine can be started from outside the cabin. It is something.

(F) Effects According to this invention, the worker can start the engine without entering or exiting the cabin, and the engine automatically stops rotating when the second floor floor plate has finished raising and lowering. This has the effect of saving fuel without putting an extra burden on the system.

(G) Example The example of the present invention will be explained in detail based on the drawings.
A shows a car carrier, in which a cabin 2 housing a driving unit 1 is disposed at the front of a vehicle body a, and power from an engine 3 disposed below the cabin 2 is transmitted to a clutch 4.
The power is transmitted to the rear wheels 6 via the transmission 5 to cause the vehicle A to run, and a frame-shaped vehicle loading device b is mounted on the upper surface of the vehicle body a behind the cabin 2 to load the vehicle d in two stages, upper and lower. It is configured to be transported.

The loading device b is composed of a first-floor floor plate 7 fixed to the upper surface of the vehicle body a and a second-floor floor plate 8 whose rear end is movable up and down. The end is lowered to contact the road surface, and the rear end 10 of the second floor board 8 is lowered to maintain the rear end 10 at the loading position e, which is substantially aligned with the front end of the road board 9, and when the vehicle d moves by itself. , the vehicle A was loaded onto the second floor plate 8 sequentially from the rear, and the rear end 10 of the vehicle A was then raised until the second floor plate 8 was in a horizontal position. The second floor floor board 8 is raised to the high position f shown in Figure 1, and a car is loaded onto the first floor board 7 with sufficient clearance above the first floor board 7. When the first floor floor board 7 is finished being loaded, the second floor floor board 8 is raised to a high position f as shown in FIG. By lowering the floor plate 8 to the transportation position g shown in Figure 1, the center of gravity is lowered during transportation and the total height is 3.8m, which is regulated by law.
We are trying to comply with the following. The raising and lowering operation of the second floor plate 8 is performed by a hydraulic cylinder 11 disposed on the lower surface of the rear of the vehicle body a, and a hydraulic pump 12 disposed on the side of the transmission 5 causing the cylinder 11 to extend and contract. This is done by tensioning and relaxing the wire 13 stretched across the second floor floor surface, and in order to control the lifting and lowering operation, an engine start switch 15 is installed on the side column 14 of the loading device b.
A second floor board lift switch 16 is provided, and upper, middle and lower positions for detecting the up and down positions of the second floor board 8 are provided on the sides of the side pillars 14 corresponding to the high position f, transport position g and loading position e of the second floor board 8, respectively. Sensors 17, 18, and 19 are provided.

FIG. 2 shows the control circuit, which excites the starting motor solenoid S by closing the engine start switch 15, starts the engine 3, operates the hydraulic pump 12, and closes -1 of the lift switch 16 of the second floor floor plate lift switch 16. Activates the lift relay 20, closes the relay contact 20-1, and energizes the second floor plate lift solenoid 21 of the electrohydraulic control valve interposed between the hydraulic pump 12 and the hydraulic cylinder 11 to raise the hydraulic cylinder 11. It is extended to operate the second floor floor surface 8 to raise it, and the same floor surface 8 is at a high position f.
When the upper position sensor 17 is activated and the control relay 22 is activated, the normally closed contact 2 of the relay 22 is activated.
2-1 is opened to release the self-holding, demagnetize the second floor plate lifting solenoid 21, stop the extension operation of the hydraulic cylinder 11, and stop the lifting operation of the second floor plate 8. When the second floor floor board 8 is lowered, the lowering switch 16-2 is closed to operate the lowering relay 23, closing the relay contact 23-1, energizing the second floor lowering solenoid 24, retracting the hydraulic cylinder 11, and lowering the second floor floor board. When the second floor plate 8 reaches the transportation position g, the middle position sensor 18 is activated and the control relay 2 is activated.
2, the contact point 22-2 is opened to release the self-holding state, demagnetize the solenoid 24, and stop the retracting operation of the hydraulic cylinder 11. Note that the operation of the lower position sensor 19 is also similar to that of the middle position sensor 118. and each position sensor 1
The operation of the control relay 22 by the outputs from 7, 18, and 19 closes the relay contact 22-3, energizes the fuel injection stop solenoid S' for stopping the engine 3, and stops the rotation of the engine 3. It is composed of In the figure, 15-1 indicates a manual engine stop switch. Reference numeral 25 indicates a timer, and the timer 25 automatically opens the contact 25-1 after a predetermined period of time has passed, that is, after the engine 3 has stopped, and the fuel injection stop solenoid is activated by the continued operation of each position switch 17, 18, 19. This prevents unnecessary excitation of S' and enables the engine to be restarted. Reference numeral 26 denotes a pressure switch, which closes when the oil pressure between the hydraulic pump 12 and the hydraulic cylinder 11 increases to operate the control relay 22 and stop the engine 3.

Note that 5' indicates the hydraulic oil tank, and 27 indicates the road board 9.
A circuit for raising and lowering, 28 a circuit for raising and lowering the upper cab floor, and 29 a circuit for raising and lowering the cab back floor for the cab tilt. Further, the switches of each circuit are connected to the unloader solenoid 30 to reduce the load on the hydraulic pump 12 except when each lifting mechanism is operating. 31 indicates a changeover switch;
The lifting operation can be switched between automatic and manual operation, and the engine 3 does not automatically stop when the operation is manual.

In addition, stoppers 33 are provided at the upper, middle, and lower tiers of the front side of the rear side column 32 of the loading device b, respectively, and the stoppers 33 engage with the lower surface of the second-floor floor plate 8 to prevent the floor plate 8 from accidentally touching the floor plate 8. A rotatable pivot 35 is mounted inside a substantially box-shaped stopper body 34, and a coaxial 3 is attached to the coaxial 35.
A locking piece 36 that rotates together with the locking piece 36 is fixed by a set screw 37, and a lever 38 is connected to the front end of the coaxial 35, and a release lever 39 is pivotally supported at the tip of the lever 38 and the lower part of the column 32 on the same side. The upper end is interlocked and connected to the upper end via a connecting rod 40, and when the second-floor floor plate 8 moves upward, the locking piece 36 is rotated upward by the upper surface of the floor plate 8, and the locking piece 36 is inserted into the stopper body 34.
is stored, and when the floor plate 8 passes the stopper 33 placement position, the locking piece 36 rotates downward due to the repulsive force of the return spring 41 and the weight of the locking piece 36, and is moved inward from the inner surface of the same side column 32. It protrudes in the direction and engages with the lower surface of the second floor board 8 to support the floor board 8 from below and prevent the floor board 8 from falling accidentally. Further, the release lever 39 has a shaft support 42 at its midpoint, and a release rod 4 extending inward at the lower end of the lever.
3 protrudes, so when the second floor board 8 is at the lowest loading position e, the lower surface of the second floor board 8 is connected to the same rod 4.
By pressing down 3, the connecting rod and lever 38
The operation of the locking piece 36 is made more reliable by rotating the locking piece 36 downward through the rear side column 32 and protruding from the inner surface of the rear side pillar 32. When the floor plate 8 is lowered, the operator operates the release lever 39 to store the locking piece 36 in the stopper body 34, thereby allowing the floor plate 8 to be lowered.

[Brief explanation of the drawing]

FIG. 1 is an overall side view of a car transport vehicle having a second-floor floor plate elevation control device according to the present invention, and FIG.
Control circuit diagram, FIG. 3 is a schematic diagram showing a connected state,
FIG. 4 is a sectional view (front view) of the stopper, and FIG. 5 is a side view of the release lever. A: car carrier, a: vehicle body, b: loading device,
d: car, 2: cabin, 3: engine, 8:
Second floor floor plate, 15: Engine start switch, 16:
Second floor floor plate lift switch, 17, 18, 19: Upper, middle and lower position sensors, 33: Stopper, 36: Locking piece.

Claims (1)

[Scope of utility model registration request] A loading device b is provided with a second floor plate 8 that can be raised and lowered at the rear of the vehicle body a, and is capable of loading the automobile d in two stages, upper and lower.
In the car transport vehicle A equipped with the above, the device b is equipped with an engine start switch 15, a second-floor floor plate lift switch 16, and upper, middle, and lower position sensors 17, 18, and 19 for detecting the upper and lower plates of the second-floor floor plate 8. ,
Engine start switch 15 from outside the cabin 2
The engine 3 of the vehicle A is enabled to start, and each sensor 17, 18, 19 detects the end of the lifting operation of the second floor plate 8 and stops the lifting operation, and the engine 3 is also stopped. A car transport vehicle in which a loading device b is provided with a stopper 33 that pivots a locking piece 36 that is rotatable in and out in order to engage with the lower surface of a second floor plate 8 and prevent the second floor plate 8 from falling. 2nd floor floor plate lifting control mechanism.