JPH06107058A - Truck having crane - Google Patents

Abstract

PURPOSE:To enable the nonerroneous wireless operation of a winch and a crane in simple mechanism and the inexpensive mounting of a wireless- controllable winch by modification. CONSTITUTION:A bypass path 3 is installed by connecting a changeover valve 2 to a hydraulic circuit of a crane 1. A hydraulic motor 5, 6 for a winch 4 for heavy object lifting is connected to the bypass path 3. By turning the changeover valve 2 to the bypass path 3 and thus wireless controlling, the control of the crane 1 is suspended, so that the winch 4 for lifting a heavy object becomes operable. Then, by installing a changeover valve additionally, wireless operation of a crane can be in common with a crane. Accordingly, a winch can be wireless operated very inexpensively, and also without modifying a crane control circuit, a winch can be wireless-controlled in a simple manner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a truck equipped with a crane that can be operated wirelessly, and more particularly to a truck equipped with a hoisting winch for loading a heavy load on a bed in addition to the crane.

[0002]

2. Description of the Prior Art Lorries equipped with radio-operated cranes have already been developed. This lorry has the feature that it can be conveniently used by operating the crane from an easy-to-use position.

Further, in addition to the crane, a freight vehicle equipped with a heavy object hoisting winch for pulling a heavy object such as a bulldozer with a wire and pulling it up to a bed has been developed. In this lorry, the back of the luggage carrier is lowered to incline the whole body, or the luggage carrier is slid backward in this posture, or a walking board is provided at the rear end of the luggage carrier, and heavy items such as bulldozers are pulled up by wires. It is like this. In this lorry, a wire can be connected to a heavy object, and the wire can be wound by a winch for hoisting the heavy object to lift the heavy object to a bed. The operation of a winch for hoisting a heavy object is usually performed by placing it on a heavy object such as a bulldozer. This is because a winch is used to pull and move the handle while operating a heavy-weight handle that is pulled up to the platform. If a heavy object is pulled up to the loading platform without operating the handle, it is difficult to mount it at a fixed position on the loading platform. In addition, there is a risk that heavy objects may fall off the walking board. For this reason,
In a freight car equipped with a winch, the operation switch for operating the winch is extended by an electric wire. The extended operation switch is extended to the driver's seat of the bulldozer and is operated together with the steering wheel to lift heavy items to the bed.

[0004]

The operation switch extended by the electric wire is expensive to manufacture. This is because it uses a wire that is longer than the back end of the carrier and makes this wire fairly robust. Further, the operation switch has a drawback that the electric wire interferes with the passage of heavy objects and cannot be used conveniently. Furthermore, if a heavy object steps on and breaks the electric wire, the winch malfunctions, which is extremely dangerous.

This drawback can be solved by wirelessly operating the winch. However, the wireless operation of the winch has a drawback that the mechanism is extremely complicated and the manufacturing cost is further increased. This is because a wireless operation of the winch requires a transmitter, a receiver, and a solenoid valve of a hydraulic circuit controlled by the receiver.

This drawback is due to the radio control mechanism of the crane.
It can be solved to some extent by incorporating a winch wireless operation. However, when the radio operation of the winch is added to the radio operation of the crane, it is necessary to increase the number of channels of the radio control mechanism. For example, if the crane is operated in 6 channels, and the boom is moved up and down, the wire is moved up and down, the boom is rotated left and right, and the winch is wound and unwound, the radio control mechanism must have 8 channels. As described above, the multi-channel radio control mechanism has a drawback that the mechanism of the transmitter, the receiver, and the control valve becomes complicated and the cost becomes high. Furthermore, the number of operation switches of the transmitter is increased, and there is a drawback that operation mistakes are increased.

Further, winches are often retrofitted with a lorry that is already equipped with a crane. In this case, when operating the winch wirelessly, replace the radio control of the crane to increase the number of channels and modify both the crane and winch to operate with one radio control, or use a radio control dedicated to the winch. It is necessary to prepare separately. For this reason, there is a drawback that the winch becomes wirelessly operated, which makes the winch extremely expensive. In addition, when controlling both the crane and winch with one radio control,
Unless you can fully understand the internal structure of the radio control mechanism,
It cannot be modified. Therefore, there is a drawback that it cannot be easily modified.

The present invention was developed to solve these drawbacks, and an important object of the present invention is to provide a winch and a crane that are convenient and wireless by a simple and inexpensive mechanism. To provide a lorry with a crane that can be operated.

Another important object of the present invention is to provide a truck with a crane in which a winch can be wirelessly operated by simply improving a radio controlled radio crane.

[0010]

In order to achieve the above-mentioned object, a crane-equipped freight vehicle of the present invention has the following construction. That is, the lorry of the present invention is an improvement of a vehicle equipped with a wirelessly controlled crane, in which a switching valve 2 is connected to a hydraulic circuit of the crane 1 to bypass a winch 4 by radio. Is provided. A hydraulic motor 6 for a winch 4 for heavy goods is connected to the bypass 3. The heavy load hoisting winch 4 is wirelessly operated by the radio control of the crane 1 by switching the switching valve 2 to the bypass 3 side and wirelessly controlling it.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. However, the examples described below exemplify a freight vehicle for embodying the technical idea of the present invention, and the freight vehicle of the present invention has a material, a shape, a structure, and an arrangement of components. It is not specific to the structure below. The lorry of the present invention can be modified in various ways within the scope of the claims.

Further, in this specification, for easier understanding of the claims, the numbers corresponding to the members shown in the embodiments are referred to as "claims" and "means for solving the problems". It is added to the members shown in "Column". However, the members shown in the claims are not limited to the members of the embodiment.

The freight vehicle shown in FIG. 1 has a crane 1 and a heavy material hoisting winch 4 in front of a luggage carrier 7 which is a bicycle body.
It has and.

The vehicle body is tilted when a heavy load is placed on the platform 7. Therefore, in the vehicle body, the lifting cylinders 8 are vertically fixed on both sides of the front of the luggage carrier 7. Lifting cylinder 8 pushes out the rod,
Lift the front of the car body and lower the back of the carrier 7. Further, the vehicle body has a walking board 9 at the rear end of the loading platform 7.
Are equipped with. The walking board 9 pulls out the platform 7 in an inclined state, and bridges heavy objects to the platform 7.

The winch 4 is fixed to the lower part of a frame 10 fixed to the front part of the luggage carrier 7. A plan view of the winch 4 is shown in FIG. The winch 4 includes a winding drum 4A, a worm gear that drives the winding drum 4A to rotate, a hydraulic motor 6 that drives the worm gear, and a base.

The winding drum 4A has a cylindrical shape with flanges on both sides so that the pulling wire 11 can be wound.
The rotation axis is fixed at the center. One end of the rotary shaft is connected to the base via a bearing, and the other end is connected to the hydraulic motor 6 via a worm gear.

The hydraulic motor 6 drives the winding drum 4A via a worm gear to wind the pulling wire 11 or feed the pulling wire 11.

The crane 1 is installed in a current automobile,
Moreover, the crane 1 of all the mechanisms to be mounted can be used. The crane 1 shown in the figure is a swing type crane 1 and is provided with a hoisting boom 1A. Ups and downs boom 1
A hook 1B is hung on A via a hanging wire 1C. The hoisting boom 1A is swiveled in a horizontal plane and tilted in a vertical plane. The hook 1B is moved up and down by the hanging wire 1C. The hoisting boom 1A and the hook 1B are driven by a hydraulic motor (not shown). Therefore, the crane 1 has three built-in hydraulic motors. One hydraulic motor rotates the hoisting boom 1A in the horizontal plane, the second hydraulic motor tilts the hoisting boom 1A, and the third hydraulic motor drives the hanging wire 1C to hook 1B. Move up and down.

A circuit for driving the hydraulic motors of the crane 1 and winch 4 is shown in FIG. In this figure, the hydraulic motor 5 of the crane 1 is connected to a hydraulic pump 13 via a switching valve 2 and a solenoid valve 12. Winch 4
The hydraulic motor 6 is connected in parallel with any hydraulic motor 5 that turns or tilts the crane 1 or drives the hanging wire 1C via the switching valve 2.

The solenoid valve 12 is connected to the receiver 14 and is controlled by the output signal of the receiver 14. The output side of the solenoid valve 12 is connected to the hydraulic motor 5 of the crane 1 and the hydraulic motor 6 of the winch 4 via two switching valves 2. The switching valve 2 is a solenoid valve 12 by switching the manual lever.
The output side of is connected to the hydraulic motor of either the crane 1 or winch 4. When the interlocking switching valve 2 is used, the two switching valves 2 can be switched together by one manual lever.

The receiver 14 receives the radio wave transmitted from the transmitter 15 and drives the solenoid valve 12. Transmitter 15
Has an operation button 16 for controlling the crane 1. An electric switch (not shown) is connected to each operation button 16. When each switch is pressed, the transmitter 15 transmits, for example, a radio wave in which the carrier wave is modulated with tone signals having different frequencies, and also a radio wave in which the carrier wave is modulated with a digital signal corresponding to each switch. The radio wave oscillated from the transmitter 15 is received by the receiver 14, and the receiver 14 detects the radio wave and detects a signal having a different frequency, or detects a digital signal, and an electromagnetic wave corresponding to the detected signal is detected. Control the valve 12.

The hydraulic circuit shown in FIG. 3 operates as follows,
Control the crane 1 or winch 4. When using the crane 1, the switching valve 2 is set to the solid line position in the figure. When the operation button 16 of the transmitter 15 is pressed in this state, the transmitter 15 transmits a radio wave modulated by a signal corresponding to the operation button 16. The receiver 14 receives the radio wave and detects it, and the operation button 1
The solenoid valve 12 is controlled by detecting the signal corresponding to the signal 6.
For example, if the transmitter 15 pushes the operation button 16 for rotating the crane 1, the solenoid valve 12 drives the hydraulic motor 5 for rotating the crane 1.

In this way, the electromagnetic wave 12 transmitted from the transmitter 15 controls the solenoid valve 12 to wirelessly control the crane 1.

When the winch 4 is used instead of the crane 1, the switching valve 2 is switched to the chain line position. In this state, instead of the hydraulic motor 5 of the crane 1,
The hydraulic motor 6 of the winch 4 is connected to the solenoid valve 12. Therefore, in this state, the operation button 16 of the transmitter 15
When is operated, the solenoid valve 12 drives the hydraulic motor 6 of the winch 4, and the winch 4 can be wirelessly controlled.

[0025]

EFFECT OF THE INVENTION The crane-equipped freight vehicle of the present invention does not have a radio control mechanism dedicated to winches, but can accurately operate a winch for hoisting a heavy object from a distance placed on a bulldozer or the like. There are features. This is because the truck of the present invention is provided with a bypass passage in the hydraulic circuit of the crane through a switching valve, and the winch hydraulic motor is connected to this bypass passage. If the switching valve is switched to the bypass path, the winch can be controlled by radio instead of the wireless operation of the crane. In this state, the lorry of the present invention that can operate the winch by radio control can stop part or all of the wireless operation of the crane and operate the same transmitter to wirelessly operate the winch. Therefore, when operating the winch, the malfunction of the crane can be prevented, and the transmitter of the winch is not used, and the winch can be operated wirelessly by using the transmitter of the crane as well. .

Further, the lorry of the present invention has a feature that the structure for wirelessly operating the winch is extremely simplified, and the winch can be controlled by a radio control at a cost which cannot be imagined by conventional ones. It is a lorry of the present invention,
This is because a switching valve is connected to the hydraulic circuit of the crane to provide a bypass path, and a winch hydraulic motor is connected to this bypass path. According to this structure, a transmitter and a receiver, which are indispensable for wirelessly operating the winch,
A winch can be radio-controlled by adding only a switching valve connected to the hydraulic circuit of the crane without the need for a control valve. Therefore, the freight vehicle of the present invention adds the cost of operating the winch to the radio control, not to mention the one using the wired operation switch, but adding the winch radio control mechanism to the radio control mechanism of the crane. Compared to the one that adds a radio-controlled mechanism dedicated to winches, it has the feature of being dramatically cheaper.

By the way, even in the conventional cheapest mechanism for operating a winch with a wired operation switch, in order to control the winch, the operation switch, a long and sturdy electric wire, the operation switch and the electric wire are used. A storage box for storing and a solenoid valve controlled by an operation switch are required, and this mechanism costs hundreds of thousands of yen. On the other hand, the structure of the freight vehicle of the present invention in which the switching valve is provided with the bypass passage is
It has the feature that a winch can be controlled by adding a tens of thousands yen switching valve.

Furthermore, the remarkable features of the present invention are:
It is to be able to operate the winch by radio control at a very low cost, and without modification of the crane control circuit, especially without understanding the electric processing circuit, by a person having no special skill. For this reason, there is a feature that a winch can be controlled by modifying a truck equipped with a radio-controlled crane. This is extremely important to the industry, where cranes and winches are each equipped by specialized vendors. Moreover, since the electric circuit for wirelessly operating the crane is not modified, it is possible to realize the feature that the maintenance is easy. If the radio control electric circuit manufactured by the crane contractor is modified by the winch contractor, maintenance of the electric circuit needs to be maintained by a non-manufacturer winch contractor. However, in the lorry of the present invention, the winch can be radio-controlled without modifying the electric circuit of the radio-controlled mechanism of the crane. Therefore, the electric circuit of the radio control can be maintained by the manufacturer of the crane, which is the manufacturer of the radio control, and a feature that the maintenance and inspection can be surely realized is realized.

Furthermore, in the truck of the present invention, since the radio control mechanism of the crane is also used for the radio control operation of the winch, the crane cannot be normally operated by radio when operating the winch. This is not a problem for a truck equipped with this crane and a winch, but rather an excellent feature. that is,
This is because the crane and the winch are not operated together, and the crane does not move accidentally when operating the winch. The operation of the heavy load winch is when pulling a heavy load such as a bulldozer to the loading platform. In this case, do not operate the crane by operating the radio control with the steering wheel while riding in the driver's seat of the bulldozer.

[Brief description of drawings]

FIG. 1 is a side view of a truck equipped with a crane and a winch.

FIG. 2 is a plan view showing an example of a winch.

FIG. 3 is a block diagram showing a hydraulic circuit of a crane and a winch.

[Explanation of symbols]

1 ... Crane 1A ... Elevating boom 1B ... Hook
1C ... Suspension wire 2 ... Switching valve 3 ... Bypass passage 4 ... Winch 4A ... Winding drum 5 ... Hydraulic motor (crane) 6 ... Hydraulic motor (winch) 7 ... Luggage bed 8 ... Lifting cylinder 9 ... Walk board 10 ... Frame 11 ... Traction wire 12 ... Solenoid valve 13 ... Hydraulic pump 14 ... Receiver 15 ... Transmitter 16 ... Operation button

Claims (1)

[Claims] 1. In a vehicle equipped with a wirelessly controlled crane, a bypass path (3) is provided in the hydraulic circuit of the crane (1) by connecting a switching valve (2). ) Is connected to the hydraulic motor (6) for the heavy load winch (4), and the heavy load winch (4) is wirelessly controlled by switching the switching valve (2) to the bypass path (3) side. Four)
A lorry with a crane, characterized in that it is configured to operate.