JPH072307Y2 - Cargo handling vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a cargo handling vehicle in which a column device moves back and forth on a subframe.

<Prior Art> Conventionally, there is a cargo handling vehicle (hereinafter referred to as “carrier”) as shown in FIG. This carrier 145
A column device 151 provided so as to be movable back and forth on a sub-frame 47 provided on the chassis frame 46, and the column device 151 includes a carrier-side upper connecting member 61 that is detachably connected to a container-side upper connecting member (not shown). And a carrier-side lower connecting member 91 that is detachably connected to the container-side lower connecting member.

Further, the column device 151 includes a hydraulic motor (not shown) that drives the column device 151 itself in the front-back direction on the sub-frame 47, a hydraulic cylinder 71 that drives the carrier-side upper connecting member 61 in the vertical direction, and A hydraulic cylinder 96 for driving the carrier-side lower connecting member 91 in the vertical direction is provided. Hydraulic motor and hydraulic cylinder 71 of the column device 151
The hydraulic cylinder 96 is driven by the hydraulic circuit shown in FIG. The hydraulic pump 148, the oil tank 240, and the oil filter 241 shown in this hydraulic circuit are the chassis frame.
The hydraulic motor 59 and the hydraulic cylinders 96 and 71 are provided on the column device 151 side while being provided on the 46 side. Then, as shown in FIG. 4, the hydraulic pump 148 provided in the lower portion of the sub-frame 47.
The oil tank 240 is connected to the hydraulic motor 59 and the hydraulic cylinders 96 and 71 by hydraulic pipes 249 and 250.

As shown in FIG. 6, the container 1 is loaded in the carrier 145. Now, the carrier 145 and the container 1 are in the state shown in FIG. 6A, the container-side lower connecting member 16 is in the raised position, and the supporting member 3 is in a state of being retracted in the rear column 5. Further, the hydraulic cylinder 71 shown in FIGS. 4 and 5 is in a contracted state, and the hydraulic cylinder 96 is in an expanded state.
The carrier-side upper connecting member 61 and the carrier-side lower connecting member 91 are vertically in contact with each other at the lowest point in the column device 151. In this state, the carrier-side upper connecting member 61 and the container-side upper connecting member 11 are connected, and the carrier-side lower connecting member 91 and the container-side lower connecting member 16 are connected. Then, the carrier-side upper connecting member 61 extends the hydraulic cylinder 71 to raise it, and the carrier-side lower connecting member 91 is made to stand still with respect to the ground without operating the hydraulic cylinder 96. Then, the front part of the container 1 is lifted by the carrier-side connecting member 61 via the container-side connecting member 11, and at the same time, the rear part of the container 1 is lifted by the supporting members 3, 3 as follows. That is, since the container-side lower connecting member 16 is stationary with respect to the ground by the stationary carrier-side lower connecting member 91, when the container-side lower connecting member 16 rises, the container-side lower connecting member 16 is moved relative to the container main body 2. The chain 40 is relatively lowered, the chain 40 is loosened, the supporting members 3, 3 are projected downward by the chain 21, and the rear portion of the container 1 is raised as shown in FIG. 6 (b). That is, the front portion of the container 1 is pulled up by the carrier-side upper connecting member 61, and the rear portion is raised by the supporting member 3, and the movements thereof are synchronized, so that the container 1 is raised horizontally as shown in FIG. 6 (b). To do. The main girder 32 provided at the bottom of the main body 2 of the container 1 is a carrier.
When the level of the sub-frame 47 of 145 becomes substantially the same level, the operation of the hydraulic cylinder 71 on the carrier side is stopped,
The ascending movement of the container 1 is stopped. Then carrier 14
With the brake of 5 released and the transmission in neutral, the hydraulic motor 59 as the column device driving means on the column device 151 is driven to move the column device 151 forward relative to the chassis frame 47. . At this time, since the rear portion of the container 1 is supported by the grounding member 7 at the lower end of the supporting member 3 and does not move horizontally with respect to the ground, as shown in FIG.
The 5th side is pulled backward and moves. Then container 1
With the carrier placed on the carrier 145, the hydraulic cylinder 96 of the carrier 145 is contracted to raise the carrier-side lower connecting member 91 and the container-side lower connecting member 16 to raise the chain.
The support member 3 is pulled up from the ground via 40 to bring it into a state as shown in FIG. 6 (d).

When the container 1 is unloaded from the carrier 145, it may be operated in the order shown in FIGS. 4 (d), (c), (b) and (a), which is the reverse of the operation described above.

<Problems to be Solved by the Invention> However, in the conventional cargo handling vehicle 145, as shown in FIG. 4, a hydraulic pump provided under the subframe 47 is used.
Since 148 and the oil tank 240, and the hydraulic pipes 249 and 250 connecting the hydraulic motor 59 and the hydraulic cylinders 71 and 96 provided in the column device 151 are required, when the column device 151 is moved in the front-rear direction, The hydraulic pipes 249, 250 connecting the hydraulic cylinders 71, 91 etc. provided in the column device and the hydraulic pump 148 provided in the lower part of the sub-frame 47 may be bent or meandered, and the hydraulic pipes 249, 250 may be destroyed. . In order to prevent such bending and meandering of the hydraulic pipes 249 and 250, there is a problem that a bending meandering prevention member is generally required. Further, there is a problem that it is difficult to attach the hydraulic pipes 249 and 250 because the chassis frame 46 has a bracket or the like.

Therefore, an object of the present invention is to provide a cargo handling vehicle in which the hydraulic pipe can be easily attached without requiring a member for preventing the hydraulic pipe from bending and meandering.

<Means for Solving the Problems> In order to achieve the above object, the present invention provides a column device provided on a subframe mounted on a chassis frame so as to be movable back and forth, and the column device provided on the column device. A column device driving means for moving in the front-rear direction, a carrier-side connecting member that is provided in the column device so as to be vertically movable, and is detachably connected to the container-side connecting member,
A container-carrying vehicle including a hydraulic cylinder for moving the carrier-side connecting member up and down, wherein the column device includes an electric motor, a hydraulic pump, and an oil tank, and the column device driving means and the hydraulic cylinder are provided. The feature is that a power unit for supplying pressure oil is provided.

<Operation> In the cargo handling vehicle having the above-described configuration, the column device is provided with the power unit that has the electric motor, the hydraulic pump, and the oil tank and that supplies the pressure oil to the column device driving means and the hydraulic cylinder. Therefore, when the column device moves in the front-rear direction on the sub-frame, the power unit moves integrally with the column device, so that the hydraulic pump of the power unit, the column device driving means, and the hydraulic cylinder are combined. The hydraulic piping between them does not bend or meander.
Therefore, the bending and meandering prevention member for the hydraulic pipe is not necessary. Further, it is not necessary to attach the hydraulic pipe to a chassis frame, which requires a bracket or the like and is difficult to pipe.

<Embodiment> The present invention will be described in detail below with reference to an illustrated embodiment.

As described above, the present invention is an improvement of the power unit for supplying pressure oil to the hydraulic cylinder by the hydraulic motor provided in the column device and the hydraulic piping of the power unit in the conventional cargo handling vehicle.
The configuration of the cargo handling vehicle of this embodiment will be described focusing on the improved portion. Since the configuration of the other parts other than the improved part is substantially the same as the conventional cargo handling vehicle amount, the same components are designated by the same reference numerals and the description thereof will be omitted.

FIG. 1 is a perspective view of the carrier 45 of this embodiment. A power unit 299 is provided on the front side of the column device 51. The power unit 299 includes an electric motor 244 and a cylindrical oil tank 240 coaxial with the electric motor 244. The oil tank 240 has a hydraulic pump (not shown) built therein. Further, the electric motor 244 receives electric power from the carrier 45 through an electric wire (not shown) to drive the hydraulic pump. The hydraulic pump of the power unit 299 supplies pressure oil to the hydraulic cylinder 71, the hydraulic cylinder 96 on the column device 51, and a traveling hydraulic motor of the column device 51 as column device driving means (not shown). As described above, since the power unit 299 including the electric motor 244, the oil tank 240, and the hydraulic pump is provided on the front side portion of the column device 51, the column device 51 moves in the front-rear direction on the subframe 47. When doing so, the power unit 299 moves integrally with the column device 51,
The hydraulic pipes 249, 250 between the hydraulic pump 299, the hydraulic motor, and the hydraulic cylinders 71, 96 do not bend or meander.

In addition, in this embodiment, the connecting portion with the container is the column device.
The power unit 299, which has heavy objects such as an oil tank 240, an electric motor, and a hydraulic pump, while being at the rear of the 51
Since the power supply unit 299 is provided in the front portion of the column device 51, the power unit 299 plays a role of counter balance and can achieve weight balance.

In the above embodiment, the electric motor 244 constituting the power unit 299 receives electric power from the carrier 45 through a power source (not shown), but as shown in FIG.
A column device side connector 291 and a battery (not shown) connected to the electric motor are provided in 51, while a carrier side connector 292 is provided in the front part of the carrier 45 so that when the column device 51 moves forward on the sub-frame 47. The column device side connector 291 and the carrier side connector 292 may be connected. In this case, the electric motor 244 obtains electric power by the battery provided in the column device 51 at the time of loading and unloading of the container, while at the time of traveling of the carrier 45,
The column on the device side 291 and the connector on the carrier side 2
92 is connected, and the battery is charged from the charging device of the carrier 45 through the connected connectors 291 and 292.

<Effect of the Invention> As is clear from the above, the cargo handling vehicle of the present invention has the electric motor, the hydraulic pump, and the oil tank, and the pressure is applied to the column device driving means and the hydraulic cylinder for vertically moving the carrier side connecting member. Since the power unit for supplying oil is provided in the column device, hydraulic piping between the chassis frame of the carrier and the column device is unnecessary. Therefore, according to the present invention, when the column device moves in the front-back direction on the sub-frame, the hydraulic pipe is not bent or meandered, and the hydraulic pipe is not broken. Further, the bending and meandering prevention member for the hydraulic pipe is unnecessary. Further, since the hydraulic pipe does not move, the bodywork becomes easy.

Further, when the power unit is provided in front of the connecting portion with the column device, the power unit serves as a counter weight with respect to the connecting portion with the container, so that the stability of the column device can be increased.

[Brief description of drawings]

FIG. 1 is a view of a cargo handling vehicle according to an embodiment of the present invention seen obliquely from the rear, FIG. 2 is a view of a cargo handling vehicle of another embodiment seen obliquely from the rear, and FIG. 3 is a hydraulic circuit of the above-mentioned cargo handling vehicle. FIG. 4 is a view showing the conventional cargo handling vehicle as seen obliquely from the rear, FIG.
FIG. 6 is a diagram showing a hydraulic circuit of the conventional cargo handling vehicle, and FIG. 6 is a diagram for explaining an operation of loading a container on the conventional cargo handling vehicle. 1 ... Container, 2 ... Container body, 3 ... Supporting member, 11 ... Container side upper connecting member, 16 ... Container side lower connecting member, 21,40 ... Chain, 45,145 ... Carrier, 46 ... Chassis frame, 47 ... Subframe, 5
1,151 …… Column device, 61 …… Carrier side upper connecting member, 71,96 …… Hydraulic cylinder, 91 …… Carrier side lower connecting member, 240 …… Oil tank, 241 …… Oil filter, 148 …… Hydraulic pump, 244 …… Electric motor, 249,250
...... Hydraulic piping, 299 …… Power unit.

Claims (1)

[Scope of utility model registration request] 1. A column device provided on a subframe mounted on a chassis frame so as to be movable back and forth, a column device driving means provided on the column device for moving the column device in the front-rear direction, and the column device. A container-carrying vehicle including a carrier-side connecting member that is vertically movable and that is detachably connected to a container-side connecting member, and a hydraulic cylinder that moves the carrier-side connecting member up and down, wherein the column device includes: A cargo handling vehicle comprising a power unit having an electric motor, a hydraulic pump, and an oil tank for supplying pressure oil to the column device driving means and the hydraulic cylinder.