JPS5937719Y2 - Vehicle fall prevention device for vehicle inclination angle measuring device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device that prevents the vehicle from overturning when the vehicle is tilted to the maximum (when measuring the maximum stable tilt angle) in a tilt angle measuring device for measuring the tilt angle of a vehicle.

In conventional vehicle tilt angle measuring devices, when measuring the maximum tilt angle of a vehicle mounted on the device by tilting the measuring device,
To prevent the vehicle from tipping over, a rope attached to a device was wrapped around the outside of the vehicle.

However, the ropes and the like tended to slip against the vehicle body, and the ropes slipped and came undone due to the strength of the vehicle body, making the vehicle extremely unstable.

Furthermore, as a device that does not use a rope to prevent falling inside a vehicle, there is a vehicle safety angle measuring device disclosed in Japanese Patent Application Laid-Open No. 135102/1983.

In this safety angle measuring device, a receiving plate is fixed to the side of the surface plate in order to prevent the vehicle from tipping over by tilting the surface plate on which the vehicle is placed.

However, since this receiving plate is fixed, it must be placed at a certain distance from the side of the vehicle.

Therefore, the vehicle is supported by the support plate only when the vehicle tilts beyond the maximum tilt angle.

(In other words, in this invention, the vehicle is not supported by the receiving plate unless it falls over to a certain extent, so when the surface plate is returned to its old position, the vehicle that has left the surface plate collides with the surface plate surface, causing vibrations to the surface plate. There was a problem with giving .

This invention is based on the above, and when measuring the maximum stable tilt angle of a vehicle using a vehicle tilt angle measuring device, when the vehicle reaches the maximum tilt angle, the vehicle is reliably supported and prevented from overturning. The object of the present invention is to provide a fall prevention device that can reliably prevent falls and ensure work safety.

In order to achieve the above object, this invention has a rectangular plywood on which a vehicle is placed, and a plywood tilting mechanism that tilts the plywood around its longitudinal axis, and the vehicle is placed on the plywood by this plywood tilting mechanism. For a vehicle inclination angle measurement device that measures the inclination angle of the plywood when the front and rear wheels, which are located far from the vehicle axis, are separated from the plywood by tilting the base plate placed on the vehicle, The hydraulic cylinder is fixed to the upper part of the base plate on the shaft side, and includes a movable column and a hydraulic cylinder that is movably supported in the vertical direction by the column and has a support part that abuts the side of the vehicle and can move forward and backward with respect to the vehicle. a support device, an oscillation mechanism that is provided at a position on the plywood where the two wheels come into contact and operates to generate a signal when the two wheels separate from the plywood; and a signal from the oscillation mechanism that causes the plywood tilting mechanism to operate. The vehicle overturn prevention device is provided with a control device that stops the vehicle and also operates a hydraulic cylinder to support the side surface of the vehicle using the support portion thereof.

With the above configuration, the plywood on which the vehicle is mounted is tilted by the plywood tilting mechanism to reach the maximum tilt angle of the vehicle, and the transmission mechanism is activated at the same time as the wheels located far from the tilt axis of the plywood leave the plywood. signal.

Upon receiving this signal, the control device operates the hydraulic cylinder of the support device to cause the support portion to support the side of the vehicle, and also stops the operation of the plywood tilting mechanism.

Next, this invention will be explained based on embodiments shown in the drawings.

In the figure, 1 is a plywood board on which the vehicle is placed when measuring the inclination angle of the vehicle.

This base plate 1 has a rectangular shape, and a wheel stopper 2 is provided on one side in the longitudinal direction (hereinafter referred to as the front-rear direction) at a side edge 1a of the base plate 1.
are placed parallel to each other.

Rope hooks 3 for hanging ropes are attached to each of the seven side lines of the base plate 1 at appropriate intervals (see FIG. 4).

Reference numeral 4 designates an appropriate number of pin receivers attached to one F side of the base plate 1 in the lateral force direction, and pins 6 are inserted through a bracket 5 attached to the floor F1 which is one step lower than the floor F. The hinge portion is formed by the bracket 5, pin 6, and pin receiver 4.

γ is a tilting cylinder operated by hydraulic pressure, and the floor surface F1
The lower end portion of the bracket 8 is swingably attached to a bracket 8 provided on the floor surface F2 at a lower position by means of a pin 9.

In the tilting cylinder I, the upper end of the piston γa is pivotally connected to the lower surface of the base plate 1 by a pin 10.

11 is a hydraulic pump mounted on the floor F2,
This pump 11 and the tilting cylinder 7 are connected by a conduit 13 having a solenoid valve 12 .

Note that 13a is a return pipe that returns oil from the solenoid valve 12 to the hydraulic pump 11.

Reference numeral 14 denotes a support device, and as shown in FIG. 2, there is a base block 15 at the lower end, and a support 16 is provided on the upper surface of the base block 15.

The base flock 15 has a front wall 15a at the right end in the drawing and a rear wall 15b at the left end, and a feed shaft 17 having a threaded portion 17a is fixed to the front and rear walls 15a, 15b.

This feed shaft 1γ passes through the lower end of the support column 16, and its threaded portion 17a is connected to the thrust bearings 18, 1 on both sides.
It engages with a threaded portion 19a of a subrocket wheel JL/19 attached to the lower end of the support column 16 via a thread 8'.

Reference numeral 20 denotes a column moving handle, and its handle shaft 20a
A sprocket wheel 21 is fixed to the sprocket wheel 21.

A chain 22 is hung between the sprocket wheel 21 and the sprocket wheel 19,
When the prop moving handle 20 is turned, the sprocket wheel 21 rotates the sprocket wheel 19, so the prop 16 moves between the front wall 15a and the rear wall 15b of the base block 15.
move between.

A hydraulically operated stopper cylinder 2 is installed at the top of the support column 16.
3 is installed horizontally, and a screw shaft 24 having a screw 24a is attached to the lower part of the tip m23a of the stopper cylinder 23 inside the support column 16.

The threaded portion 24a of the threaded shaft 24 is connected to the column moving handle shaft 20.
It engages with a threaded portion 25a of a bevel gear 25 that is rotatably supported on the support column 16 at the upper part of a.

26 is a bevel gear that meshes with the bevel gear 25, and is attached to the tip of the handle shaft 27a of the cylinder upper and lower handle 27 attached to the column 16.

A piston 28 is actuated by the stopper cylinder 23, and includes a head portion 28a that slides oil-tightly along the inner peripheral surface of the cylinder 23, a front rod 28b that protrudes forward from the head 128a, and a piston that protrudes rearward. The rear rod 28c'a has a rear rod 28c'a, and both rods 28b, 2
8c all protrude from the stopper cylinder 23 in the front and rear directions in an oil-tight manner.

A friction head receiver 31 to which a urethane pad 30 is fixed is attached to a spherical friction head 29 provided at the front end of the front rod 28a.

Reference numeral 32 denotes a spring receiver attached to the piston 28, and tension springs 33, 33' are provided above and below between this spring receiver 32 and the 7-reaction head receiver 31, and tension springs (not shown) are provided on both sides. When the friction head holder 3
1 is pressed against the friction head 29 with a uniform force vertically and horizontally.

Then, when the cylinder up and down handle 27 is rotated, the bevel gear 26 rotates the bevel gear 25, and the screw shaft 24 having the threaded portion 24a that engages with the threaded portion 25a of the bevel gear 25 is moved upward and downward.

In this way, when the screw shaft 24 moves upward and downward, the tip 23a of the stopper cylinder 23 is guided by the guide 34 in the column 16 and moves upward and downward, so that the stopper cylinder 23,
Therefore, the piston 28 moves up and down while maintaining a state perpendicular to the column 16.

35 is a switching valve, which is provided between the hydraulic pump 11 and the stopper cylinder 23.

36 is a manual switch for controlling the operation of the switching valve 35, and is connected to the control box 3 shown in FIG.
7 and is connected to the switching valve 35.

A limit switch 38 is attached to the lower surface of the wheel T1 of the vehicle C located on the upper surface of the base plate 1 on the opposite side of the wheel stopper 2, and is connected to the switching valve 35.

Here, the third section regarding the operation circuit of the stopper cylinder 23 will be explained.
To explain with a diagram, the interior of the stopper cylinder 23 is divided into a front chamber A and a rear chamber B by the head portion 28a of the hydraulic piston 28.
The front chamber A is connected to the rear chamber B by a conduit 39.
are each connected to the switching valve 35 by a conduit 40.

Further, the switching valve 35 is connected to the hydraulic pump 11 through a feed pipe 41 and a return valve 42.

There are six valves in the switching valve 35.

When you open the valve ■■■ and close the valve ■■■,
Pressure oil sent from the oil pump 11 passes through the valve (2) from the oil pump 41, enters the rear chamber B of the stopper cylinder 23 from the continuous chamber 40, and pushes the piston 28 forward.

On the other hand, the front chamber A of the stopper cylinder 23 is communicated with the hydraulic pump 11 via the conduit 39 and the return pipe 42 since the nozzle valve (■) is open.

Therefore, when the piston 28 is pushed toward the front chamber A by the pressure oil acting in the rear chamber B, the oil in the front chamber A returns to the hydraulic pump 11 through the conduit 39, the valve ■■, and the return pipe 42. Piston 28 moves forward.

In the same way, open the valve ■■■ of the switching valve 35 and open the valve ■■■.
When ■■ is closed, the piston 28 retreats.

Next, open the valve ■■ and close the valve ■■■■.
The pressure oil sent out from the hydraulic pump 11 returns to the hydraulic pump 11 from the feed pipe 41 through the valve ■valve ■ and the return pipe 42, and the movement of the pressure oil between the front chamber A and the rear chamber B is good. , the piston 28 is in a stopped state.

Next, when valve ■■■ is opened and valve 0■■ is closed, the pressure oil sent by the hydraulic pump 11 is sent to the feed pipe 41,
It passes through valve 0 and valve (2) and returns to the hydraulic pump 11 via the return pipe 42.

On the other hand, since valve ■ is open, stopper cylinder 2
3 communicates with the front chamber A and the rear chamber B, and as the piston 28 moves back and forth, the oil in the front chamber A and the rear chamber B flows freely, so the piston 28 is in a state where it can move freely ( Hereinafter referred to as piston free.

)It is in.

The forward and backward movement of the piston 28 is controlled by a manual switch 3.
The piston 28 can be stopped by turning off the manual switch 36, and the piston 28 can be stopped by turning off the manual switch 36. This is obtained by being in contact with one.

Next, the operation of this embodiment will be explained.

When the oil pressure of the tilting cylinder 7 is lowered, the piston 7a is lowered so that the upper surface of the base plate 1 is at the same height as the floor surface F, as shown by the dashed line in FIG.

In this state, the vehicle C is placed on the base plate 1, and the - side wheel T2 is
is located close to the wheel stopper 2.

At this time, the limit switch 38 is pressed by the wheel T1 on the opposite side to the wheel T2 and turned OFF, so that the piston 28 is in a free state.

Next, the support device 14 is moved forward (in the direction of the arrow in FIG. 4) or backward on the base plate 1 to be located near the side of the center of gravity of the vehicle C, and the support device 14 is moved onto the base plate 1. It is fixed to the plate 1 by appropriate means.

Next, turn the cylinder up/down handle 27 to move the hydraulic cylinder 23 up and down, and bring the urethane pad 30 to the height of the center of gravity of the vehicle C.

Next, turn the prop moving handle 20 to move the prop 16 closer to the vehicle C, or move the piston 28 in the free state.
Pull out the stopper cylinder 23 and remove the piston 28.
The urethane pad 30 is brought into contact with the outside of the center of gravity W of the vehicle C.

Then, the hydraulic pump 11 is operated to supply pressure oil to the tilting cylinder 7 and the stopper cylinder 23.

As a result, the piston 7a rises, and the base plate 1 rotates around the pin 6 and tilts.

As the inclination angle of the base plate 1 increases, the vehicle C slides and moves toward the wheel chocks 2 side.

As the vehicle C moves, the urethane pad 30 that was in contact with the side surface of the vehicle C also moves in the same direction while being in contact with the side surface of the vehicle C.

When the center of gravity W of the vehicle C passes directly above the wheel T2 on the wheel chock 2 side and the vehicle C reaches the maximum inclination, the wheel T1 floats and the limit switch 38 is activated.

Therefore, the solenoid valve 1 connected to the limit switch 38
2 is a tilting cylinder 7 according to a signal from a limit switch 38.
The supply of the pressure oil sent to is stopped, and the pressure oil sent after that is returned to the hydraulic pump 11 side.

On the other hand, in response to the signal from the limit switch 38, the switching valve 35 connected to the limit switch 38 opens the valve (1) and closes the valve (20), causing the piston 28 of the stopper cylinder 23 to change from a free state to a stopped state.

As mentioned above, when the vehicle C reaches the maximum inclination, the tilting cylinder 7 and the stopper cylinder 23 simultaneously stop operating.
Since vehicle C maintains the maximum inclination state, vehicle C at this time
The inclination angle is measured using a center of gravity angle indicator (not shown).

Incidentally, when measuring the maximum inclination of the vehicle C, a rope (not shown) hung from the conventional rope hook 3 may be used auxiliary.

Also, using a spring mechanism instead of the stopper cylinder 230,
The urethane pad 30 may be supported by a spring mechanism when the vehicle is at its maximum inclination.

As is clear from the above explanation, according to this invention, when the plywood is tilted by the plywood tilting mechanism and the vehicle reaches the maximum tilt angle, the front and rear wheels that contact the optical signal mechanism separate from the plywood and at the same time stop from the transmission mechanism. A signal is sent to the mechanism.

The stop mechanism responds to this signal, stops the operation of one plywood tilting mechanism, and operates the hydraulic cylinder of the support device to support the side surface of the vehicle body by the support portion of the hydraulic cylinder.

In other words, while the vehicle is tilted to the maximum tilt angle, the tilted side surface side is supported by the support device.
It is possible to prevent the vehicle from tilting upward from the maximum tilt angle, and the maximum tilt angle can be accurately measured.

Furthermore, when the plywood is returned to the position before tilting, the gaps between the front and rear wheels and the plywood are small, so when the wheels come into contact with the plywood, no impact is applied to the plywood.

[Brief explanation of the drawing]

The figures show one embodiment of this invention, with Fig. 1 being a front view of the device, Fig. 2 being a sectional view of the support device, Fig. 3 being an explanatory diagram of the operation of the switching valve and stopper cylinder, and Fig. 4 being a diagram of the device. FIG. 1... Base plate, 2... Wheel chocks, 4...
...Pin holder, 5...Bracket, 6...
...Pin, 7...Tilt cylinder, 7a...
...Piston, 11...Hydraulic pump, 14.
...Support device, 16...Strut, 23...
...Stock cylinder, 28...Piston, 30...Urethane pad, 35...
Switching valve, 38...Limit switch, C...
...Vehicle, T1. T2...wheel.

Claims (1)

[Scope of utility model registration request] It has a rectangular plywood on which a vehicle is placed, and a plywood 1 tilting mechanism that tilts the plywood around its longitudinal axis,
When the plywood on which the vehicle is mounted is tilted using this plywood tilting mechanism, and the front and rear wheels located far from the vehicle axis are separated from the plywood, the vehicle tilt angle measuring device measures the tilt angle. The base plate is equipped with a support that is movable in the direction of force, and a hydraulic cylinder that is supported by the support to be movable up and down and that is in contact with the vehicle's shoulder surface and is provided with the ability to move forward and backward with respect to the vehicle. a support device fixed to the upper part of the shaft side; an oscillation mechanism that is provided on the plywood at a position where the vehicle wheels contact and operates to generate a signal when the wheels separate from the plywood; and a signal from the oscillation mechanism. A vehicle overturn prevention device comprising: a control device that stops the operation of a plywood tilting mechanism and activates a hydraulic cylinder to support a side surface of the vehicle by its support portion.