JPS5920777A - Transport vehicle - Google Patents

Abstract

PURPOSE:To prevent impact shocks and collapse of freight from being generated due to an abrupt change in the inclination of a vehicle body at an inclination change point on a road, by a method wherein an auxiliary strut provided with a wheel and operated for securing safety of a truck at an inclination change point is provided at the forward end of a frame for the truck. CONSTITUTION:When the transport vehicle 1 ascends or descends a slope or stairway 12, if the inclination of the vehicle body is abruptly changed at the inclination change point A, the freight 14 on the vehicle may be collapsed or a floor surface 15 may be damaged. To avoid this trouble, when the vehicle 1 ascends the slope or stairway 12 to come onto the horizontal floor surface 15, the auxiliary strut 17 is depressed by an actuator therefor, the wheel 16 is seated on the flat floor surface 15 to support a front part of the truck 4, and the vehicle is moved while controlling the elevation of the strut 17 so that the truck 4 maintains the angle of inclination of the slope or stairway 12. After the center of gravity of the vehicle 1 passes the inclination change point A, the strut 17 is slowly returned to a stored position, thereby correcting the pose of the vehicle 1 to horizontal running pose. When the vehicle 1 starts descending from the flat ground surface 15, operations reverse to the above are conducted.

Description

[Detailed Description of the Invention] The present invention relates to a small-sized transport vehicle, and in particular, a small-sized trolley equipped with crawler tracks having protrusions is provided with a cargo platform that can be lifted up and down, and auxiliary support legs to ensure stability at points where the slope changes. Facilitates small transportation on ramps.

Generally, transportation equipment such as freight elevators and conveyors are used to transport goods in factories, warehouses, etc., but in places where such transport equipment is not available, forklifts and handcarts are often used as simple means of transportation. has been done. However, while forklifts and handcarts are effective for transporting goods on Heiwa Road, they can only be used on steep slopes and stairs, so they can be used between floors of warehouses and supermarkets,
In many cases, such as when moving housing complexes, people still rely on manual transportation of luggage, which requires a great deal of labor and is inefficient.

This invention solves the above-mentioned problems in small-scale transportation work on sloping roads with 7 stairs, etc.

SUMMARY OF THE INVENTION An object of the present invention is to provide a small and simple transport vehicle that can transport cargo by running on slopes and stairs; Another object of the present invention is to provide a transport vehicle that can prevent cargo from collapsing and change the slope in a stable manner.Furthermore, it is an object of the present invention to provide a transport vehicle that can perform efficient transport without depending on human power even between floors without transport equipment. The purpose of the present invention is to provide a transport vehicle that reduces the labor of workers.

That is, the present invention, as in the illustrated embodiment, has a protrusion 2
On the frame 5 of the traveling bogie 4 equipped with a track roller having
The present invention relates to a transport vehicle 1 characterized in that it is provided with a loading platform 7 that can be lifted up and down, and an auxiliary support leg 17 equipped with a wheel 2 at the tip and used to ensure stability of the traveling vehicle 4 at an inclination change point A.

The present invention will be explained below with reference to the drawings.

Fig. 1 is a side view showing the state of a transport vehicle according to an embodiment of the present invention on a peace road, Fig. 2 is a state in which it is running on stairs, and Fig. 3 is a change in inclination from a staircase to a flat floor surface. FIG. In the transport vehicle 1, a loading platform 7 is pivotally connected to an end 6 of a frame 5 of a traveling cart 4 equipped with a crawler track 3 having projections 2, and a loading platform actuator 8 such as a hydraulic cylinder is provided to enable the loading platform 7 to be raised or raised. . When the crawler track is intended for indoor use, it is best to attach an elastic track to prevent damage to stairs or passageways. The frame 5 is provided with an operation frame 9, and an operation panel 10 with a VC at the tip of the operation frame and a handle 1.
1 is installed. Further, an auxiliary support leg 17 having a wheel 16 at its tip is pivotally attached to the frame 5, and can be raised and lowered by a support leg actuator (I21 omitted). Bi @
16 is also preferably an elastic wheel like the crawler belt 6. The traveling trolley 4 is equipped with a lightweight power source and can be self-propelled.

As shown in FIG. 2, the transport vehicle 1 can travel up and down the stairs 12 without slipping because the protrusions 2 of the crawler belt 6 come into contact with the edge floor 16 of the stairs 12. Here, if it is necessary to hold the load 14 on the loading platform Z horizontally, the loading platform 7 is raised or raised by the loading platform actuator 8.

When the transport vehicle 1 travels up and down a ramp or stairs 12, at the slope change point A, if the vehicle body slope is suddenly changed, the cargo 14 may collapse or the floor surface 15 may be damaged. As shown in the figure, when moving from a vertical position to a horizontal position, the auxiliary support leg 17 is pushed down by the support leg actuator, the wheels 16 are placed on the flat floor 15, and the front part of the trolley 4 is supported. The stairs 12 are moved while controlling the elevation and elevation of the auxiliary support legs 17 so as to maintain the inclination angle α. After the center of gravity of the transport vehicle 10 has completely passed through the slope change point A, the auxiliary support legs 17 are gently returned to the storage position, and the transport vehicle 1 is corrected to a horizontal running posture. When moving down from the flat floor surface 1!5, perform the operation opposite to the above.

FIG. 4 is a block diagram showing the control system of the transport vehicle 10 of the present invention. The inclination angle detector 19 of the loading platform 7 and the inclination angle setting device 20 of the loading platform 7 provided on the transport vehicle 1 are connected to a comparator 21, and when the inclination angle of the loading platform 7 is held constant, A detection signal θ from the tilt angle detector 19 and a setting signal θ from the tilt angle setter 20. A comparison calculation unit 21 performs a comparison operation on q-shi, and sends a difference signal (θ-θ.) to the controller 22 of the loading platform actuator 8 to control expansion and contraction.The loading platform 7 is held at a set angle. . In this case, the loading platform 7 may be simply controlled to be held horizontally using a level limiter.

The tilt angle detector 26 of the truck frame 5 and the angle setter 24 of the truck frame 5 are still connected to the comparator 25, and when transitioning from an ascending position to a flat floor surface 15 at the slope change point A, The inclination angle αA of the trolley frame 5 when the wheels 16 of the auxiliary support legs 17 land on the floor is set by the angle setter 24, and the detection signal α from the inclination angle detector 26 and the setting signal α are compared and calculated by the comparator 25. Compare and calculate the difference signal (α−α
A) is sent to the controller 26 of the supporting leg actuator to control the elevation and elevation of the auxiliary supporting leg 17, thereby maintaining the inclination of the truck frame and the like at a constant level. Transport vehicle 10 center of gravity changes inclination point A
After passing through the angle α of the flat floor surface 15, use the angle setting device 24.
. By setting , the inclination of the truck frame 5 is α. and then return the auxiliary support leg 17 to the retracted position.

Transport operations such as angle setting are performed using the operation panel 10, but the operation panel 10 can also be removed from the operation frame 9 for remote control.

The transport vehicle of this invention is capable of traveling on stairs and slopes, holds the loading platform horizontally when traveling on an incline, and also prevents sudden changes in the slope of the vehicle body at slope change points (... Therefore, even between floors where there is no transport equipment, it is possible to carry out cargo transport work easily and efficiently without depending on human power, and the labor of the worker can be reduced.

[Brief explanation of the drawing]

Figure 1 e'': A side view showing the state of the transport vehicle on a flat road, which is an embodiment of the present invention, Figures 2 and 3 show the state of the transport vehicle running on stairs at 1 m, and A side view showing the state at the point where the slope changes to a flat floor surface. In the figure, 1 is a transport vehicle, 2 is a protrusion, 3 is a crawler track, 4 is a running cart, 5 is a frame of the running cart, 7 is a loading platform, 8 is an actuator for the loading platform, 16 is a wheel, 17 is an auxiliary support leg, and 19 is a loading platform. 20 is a loading platform tilt angle setting device, 21
．． 25 is a comparison calculator, 22 is a controller for the actuator for the loading platform, 23 is a tilt angle detector for the truck frame, 24 is a tilt angle setter for the truck frame, 26 is a controller for the supporting leg actuator, and A is a tilt change point. be. Patent applicant: Furukawa Mining Co., Ltd. Agent Patent attorney: Tetsuya Mori, patent attorney
Yoshiaki Uchifuji, Patent Attorney, Shimizu, Patent Attorney, Kaji Yama, Kore

Claims (3)

[Claims] (1) The frame of the running bogie is equipped with a crawler track having protrusions, and is equipped with a platform that can be lifted up and down, and auxiliary support legs equipped with wheels at the tip to ensure the safety of the bogie at points where the inclination changes. transport vehicle. (2) The loading platform is controlled by a difference signal sent from a comparator that compares and calculates the detection signal of the loading platform inclination angle detector and the setting signal of the loading platform inclination angle setting device;
A transport vehicle according to claim 1, comprising a loading platform actuator. (3) The auxiliary support leg is a sebum actuator that is controlled by a difference signal sent from a comparator that compares and calculates the detection signal of the inclination angle detector of the truck frame and the setting signal of the angle setting device of the truck frame. A transport vehicle according to claim 1 or 2, comprising: