JP2001261292A - Jack device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To synchronously elevate a plurality of sets of jack devices. SOLUTION: An input unit I/O to take up a signal from a load-carrying platform height sensor 13 and a signal from an operation switch, an analog digital conversion unit A/D, an output unit I/O to actuate a solenoid valve of each of cylinder pipings and a display by outputting a computed control signal and a display data and a digital nalago conversion unit D/A are provided, a communication unit C/Y to receive a signal from each of the sensors of the other jack device 2 and transmit the computed control signal and a display data by connecting it to the other jack device 2 through a communicating cable 17 is provided, and a programmable controller 16 free to synchronously elevate each of the jack devices 2 connected through the communication C/Y in the lump and to synchronously elevate the selected jack device 2 is furnished.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jack device for elevating a long or heavy object.

[0002]

2. Description of the Related Art When a long object such as a bridge is installed or removed, the long object is moved up and down using a plurality of jack devices having hydraulic cylinders.

[0003]

In this case, in order to synchronously raise and lower the hydraulic cylinders of each jack device, connecting a hose to each hydraulic cylinder increases the number of hoses, which is troublesome. If the length of the hose is several tens of meters, the hydraulic cylinder may not function due to piping resistance or the like. Therefore, usually, each hydraulic cylinder is operated by an operator, but it is difficult to move up and down synchronously, a large number of operators are required, and a long working time is required.

Accordingly, an object of the present invention is to provide a jack device capable of synchronously moving a plurality of units.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention relates to a jack apparatus having a carrier lifted and lowered by a hydraulic cylinder, and a height sensor for the carrier and a programmable controller for controlling the lifting and lowering of the carrier. A programmable controller, the programmable controller outputs an input unit and an analog-to-digital conversion unit that take in signals from the sensors and a signal of the operation switch, and outputs calculated control signals and display data to the solenoid valves of the cylinder pipes and A control that has an output unit for operating the display and a digital-to-analog conversion unit, and is connected to another jack device via a communication cable to receive and calculate signals from each sensor of the other jack device. Having a communication unit for transmitting signals and display data, via the communication unit It is characterized in that synchronization lifting bulk synchronous lifting and selected jack device of each jack devices that are continued is possible.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a jack device mounted on a transport vehicle will be described below in detail with reference to the drawings. A transport vehicle 1 formed by connecting two carriers each having a number of wheels in the vehicle width direction has two jack devices 2 and a power unit 3 for driving each jack device 2 mounted on each carrier. are doing.
Note that the transport vehicle 1 can be knitted by further connecting carriers in the vehicle body front-rear direction and the vehicle body width direction.

[0007] These jack devices 2 have the same configuration,
Four multi-stage telescopic loading / unloading cylinders 6 disposed near the four corners of the base 4 and the loading platform 5, a link mechanism 7 disposed between the base 4 and the loading platform 5, respectively; And a link cylinder 8 for adjusting the opening.

[0008] Each of the carrier lifting cylinders 6 has a lower end mounted on a spherical bearing 9 fixed to each of the four corners of the upper surface of the base 4 and a spherical bearing 10 fixed to each of the four corners of the lower surface of the carrier 5. The loading platform 5 is supported by contacting the upper end. The link mechanism 7 is formed by connecting two broken links 11, 11 arranged on both sides in the width direction of the base 4 and the loading bed 5 with a plurality of cross beams 12, and the two broken links 11, 11 are One end of the upper link rod 11a is attached to the lower surface of the carrier 5 and the lower link rod 1
1b is rotatably attached to the upper surface of the base 4, and the other ends of both link rods 11a and 11b are hingedly connected to each other. The link cylinder 8 is provided. The bed lifting cylinder 6 and the link cylinder 8 are driven by pressure oil supplied from the power unit 3.

The jack device 2 can lift and lower the bed 5 in the same manner as the conventional jack device.
Can be moved up and down in an inclined state, and the carrier 5 can be slid in the longitudinal direction of the vehicle body. In order to raise and lower the loading platform 5 horizontally, each loading / lowering cylinder 6 is extended and retracted synchronously,
Extend and retract the link cylinder 8.

To raise and lower the loading platform 5 in an inclined state, the link cylinder 8 is fixed and, for example, only the two loading / lowering cylinders 6 on the front side of the vehicle body are extended, so that each loading / lowering cylinder 6 becomes the base 4 and the loading platform. 5 are arranged between the spherical bearings, so that each of the loading / lowering cylinders 6 tilts toward the rear side of the vehicle body, and
Is in an inclined state in which the front side of the vehicle body has risen. Subsequently, the link cylinder 8 is contracted to adjust the opening of the link mechanism 7, and each loading platform lifting cylinder 6 is set in a vertical state. From this state,
In order to level the loading platform 5, while adjusting the opening of the link mechanism 7 with the link cylinder 8, the two loading platform lifting cylinders 6 on the rear side of the vehicle body are extended to the same length as the front loading platform lifting cylinder 6 to extend the loading platform 5. Level. When the loading platform 5 is raised to a desired height by repeating this, the loading platform lifting cylinders 6 and the link cylinders 8 are fixed. When the link cylinder 8 is expanded and contracted in the horizontal state of the loading platform 5, each loading platform lifting cylinder 6 is tilted, and the loading platform 5 can slide in the vehicle longitudinal direction.

During these operations, each loading / unloading cylinder 6
Indicates the vertical load of the load on the bed 5 and the link mechanism 7
Can bear the lateral load in the width direction, and the link cylinder 8 can bear the lateral load in the front-rear direction, so that the load of the load can be supported even when the carrier 5 is inclined or slid.

Each jack device 2 includes a height sensor 13 for the loading platform 5 and a hydraulic oil pressure sensor 14 for each loading / lowering cylinder 6.
And an angle sensor 15 for detecting the opening of the link mechanism 7. The height sensor 13 is provided before and after the carrier 5, the pressure sensor 14 is provided in a pipe portion of each carrier cylinder 6, and the angle sensor 15 is provided in the link mechanism 7.

Each jack device 2 has a programmable controller 16 for controlling the lifting and lowering of the carrier 5. The programmable controller 16 has a display, an operation switch, an input / output unit I / O, an analog / digital conversion unit A / D, a digital / analog conversion unit D / A, and a communication unit C / Y.

An input / output unit I / O and an analog / digital conversion unit A / D take in signals from the height sensor 13, hydraulic oil pressure sensor 14, angle sensor 15 and operation switch into a programmable controller 16. The programmable controller 16 calculates a control signal and display data from these signals, and transmits the control signal and display data calculated from the input / output unit I / O and the digital / analog conversion unit D / A to each of the carrier lifting cylinder 6 and the link cylinder 8. To the solenoid valve and the indicator of the piping of (1) to operate the solenoid valve and the indicator. Therefore, the elevation of the carrier 5 can be controlled by operating the operation switch of the programmable controller 16.

The communication unit C / Y is used when a plurality of jack devices 2 are moved up and down synchronously or when a jack device selected from the plurality of jack devices 2 is moved up and down.

For example, as shown in FIG. 4, when four jack devices are moved up and down synchronously, the communication units C / Y of each jack device 2 are connected via a communication cable 17, and one jack device is connected. The programmable controller 16 of the device 2 is a master station, and the programmable controllers 16 of the other jack devices 2 are local 1, local 2, and local 3. An operation panel 18 having operation switches and a display unit is attached to the programmable controller 16 of the master station.

The communication unit C / Y of the master station receives a signal from each sensor of the other jack device 2 and takes it into the programmable controller 16 of the master station. The programmable controller 16 of the master station calculates a control signal and display data for raising and lowering the bed 5 of each jack device 2 while synchronizing the height from these signals, and transmits the calculated control signal from the communication unit C / Y to the communication cable 17. To the local, local 2 and local 3 programmable controllers 16 via The display data is transmitted to the display unit of the operation panel 18. Thus, each jack device 2 moves up and down while synchronizing the height of the carrier 5. The batch synchronous lifting and lowering can be performed by two, three, four or more, and a selected one of the plurality of jack devices 2 can be raised and lowered.

As described above, simply connecting the communication units C / Y of the jack devices 2 with the communication cable 17 enables simultaneous synchronous elevation of a plurality of jack devices 2 or elevation of the selected jack device. It can be operated by one operator, and the data of all jack devices 2 can be monitored. Further, even if the distance between the jack devices 2 is large, the synchronous synchronization can be performed by connecting the communication cable 17.

[0019]

As described above, the jack device of the present invention provides an input unit and an analog-to-digital conversion unit for receiving the signal from the height sensor of the carrier and the signal of the operation switch, and outputs the calculated control signal and display data. And an output unit and a digital-to-analog conversion unit for operating the solenoid valves and indicators of the cylinder pipes, and each sensor of the other jack device is connected to another jack device via a communication cable. A programmable controller having a communication unit for receiving a signal from the control unit and transmitting a control signal and display data calculated and capable of synchronously raising and lowering each jack device connected via the communication unit and raising and lowering the selected jack device With a single operator, and all jacks Data of the device can be monitored. Furthermore, even if the distance between the jack devices is long, collective synchronous elevation can be performed by connecting a communication cable.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a programmable controller.

FIG. 2 is a cutaway side view of the jack device.

FIG. 3 is a cutaway plan view of the jack device.

FIG. 4 is a schematic diagram showing a connection state of each programmable controller.

FIG. 5 is a side view of a transport vehicle.

FIG. 6 is a plan view of a transport vehicle.

FIG. 7 is a wiring diagram showing a connection state of each jack device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Conveying vehicle, 2 ... Jack device, 4 ... Base, 5 ... Loading bed, 6 ... Loading / lowering cylinder, 7 ... Link mechanism, 8 ... Link cylinder, 9,10 ... Spherical bearing, 11 ... Two broken links, 12 ... Cross beams, 13 ... Height sensors, 14 ... Pressure sensors, 15 ... Angle sensors, 16 ... Programmable controllers, 17 ... Communication cables, I / O ... I / O units
A / D: analog / digital conversion unit, D / A: digital / analog conversion unit D / A, C / Y: communication unit

Claims (1)

[Claims] 1. A jack device having a carrier lifted and lowered by a hydraulic cylinder, comprising: a carrier height sensor; and a programmable controller for controlling the lifting and lowering of the carrier.
The programmable controller outputs an input unit and an analog-to-digital conversion unit that receive signals from the sensors and an operation switch signal, and outputs calculated control signals and display data to operate the solenoid valves and indicators of the cylinder pipes. It has an output unit and a digital-to-analog conversion unit, and by connecting to another jack device via a communication cable, receives a signal from each sensor of the other jack device and calculates a control signal and display data calculated. A jack device, comprising: a communication unit for transmitting data; wherein the jack device connected to the jack device via the communication unit can be synchronously moved up and down and the selected jack device can be moved up and down.