JP3437354B2 - Jack control device in civil engineering construction work - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jack-up method, a jack-down method, a lift-up method and the like for civil engineering and construction work, and a large number of jacks supporting heavy objects are simultaneously used. The present invention relates to a jack control device that performs high-accuracy tuning control while centrally managing the operation of each jack in a construction or construction method that requires operation. 2. Description of the Related Art In construction work, various jacks are used as temporary equipment. Particularly, a stadium stand, a gymnasium,
In the construction of a large span structure such as an exhibition hall, a construction method using a large number of jacks and supports, such as a jack-up construction method, a jack-down construction method, and a lift-up construction method, is often used. [0003] In these works, a large number of jacks must be precisely synchronized so as not to exert an adverse effect such as excessive deformation, generation of stress, and unbalanced load on the main structure and the temporary structure supporting the structure. Is required. In particular, higher accuracy is required for permanent construction than jacking up a temporary roof.
Usually, a jack jack or a hydraulic jack is used as a jack, and a plurality of skilled operators operate each jack in synchronization while monitoring the movement of the jack. [0004] In this case, there is a limit in the accuracy of manual operation of the jacks, and the operation of each jack tends to vary. In addition, since the jack supports tens of tons of heavy objects, slight improper operation or failure can cause imbalance in load or decrease in pressure due to oil leakage, etc. There is a danger that it may cause [0005] Furthermore, the operation of each jack is grasped centrally,
Because they cannot be managed, the discovery and handling of abnormalities tend to be delayed. In addition, the operation of hydraulic piping and jacks can be dangerous high-place work, and labor and labor savings are desired. The present invention has been proposed in view of such circumstances, and its purpose is to understand and manage the operation of jacks centrally in civil engineering and construction work using a plurality of jacks, and to improve safety. An object of the present invention is to provide a jack control device in civil engineering and construction work that is secured and saves labor and labor. [0006] To solve the above problems,
A jack control device for supporting heavy objects in civil engineering and construction works as the invention according to claim 1 is provided.
And a plurality of jack groups each composed of an electric screw jack, and the operation, stop, and movement directions of each jack
Control device for switching the position and measuring and monitoring the amount of jack movement
Location and the control unit and the communications synchronized control of all jacks, Ren
Group control and jack
With individual control to operate the key individually,
In addition, the amount of movement and load of each jack, or those jacks
Monitor the variation between keys and, if the control value is exceeded, immediately
Operation / monitor with safety function to stop all jacks
And the gear of the electric screw jack
Power to the motor and controller, and
The mode is changed by changing the power supply frequency with a bar.
Adjust the number of rotations of the
A switchboard which allows adjusting the moving speed of the di-axis, the control instrumentation
L to control the communication line of the PC for operation, operation and monitoring
An AN controller is provided in a civil engineering construction work , comprising: an AN controller . The most preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration of a jack control device according to the present invention. Reference numeral 1 denotes an electric screw jack, which is installed on a support, a foundation, or the like, and raises or lowers while supporting a part of a building. The necessary capacity, stroke, and moving speed are selected according to the support conditions of the moving amount. In the figure, reference numeral 2 denotes a screw shaft of the electric screw jack 1, and reference numeral 3 denotes a traveling nut screwed on the screw shaft 2. For the screw jack, a method in which the traveling nut moves as shown in FIG. 1 and a method in which the screw shaft moves can be selected according to the use conditions. Reference numeral 4 denotes a control device, which operates individual jacks,
It stops, switches the direction of movement, and measures and monitors the amount of jack movement. As the simplest method of measuring the amount of jack movement, a method of counting the number of rotations of the geared motor 5 for two rotations of the screw shaft with the rotary encoder 6 and converting it into a stroke is used. 7 is a remote controller. The control device 4 is provided with a monitor lamp for raising, lowering, and turning on the power, and an emergency button. When an emergency stop button is pressed from any of the control devices, all jacks are stopped. Reference numeral 8 denotes a personal computer for operation and monitoring. The personal computer 8 communicates with each control device 4 to perform tuning control of all jacks, tuning control for specifying and tuning an arbitrary jack, and group control for specifying and tuning an arbitrary jack. , Individual control for individually operating the jacks is possible. It also has safety functions such as monitoring the movement amount and load of each jack, or variations among those jacks, and immediately stopping all jacks if the control value is exceeded. Reference numeral 9 denotes a switchboard for supplying power to the geared motor 5 of the electric screw jack 1 and the control device 4. Further, by changing the power frequency by the inverter 10, the rotation speed of the motor is adjusted by adjusting the rotation speed of the motor, the rotation speed of the geared motor 5 of the electric screw jack 1 is adjusted, and the moving speed of the screw shaft 2 of the electric screw jack 1 is adjusted. can do. At the stage of setting the screw jack, the moving speed is set up at a high speed, and in the actual construction, the construction can proceed at a very low speed, which is efficient. Reference numeral 11 denotes a LAN controller for controlling communication lines of the personal computer 8, the control device 4, and the switchboard 9. When using the jack control device, the jack 1 and the control device 4 are installed at predetermined locations, a power supply and a communication cable are wired, and when the jack 1 is operated, the jack 8 and the personal computer 8 are used. 1 control condition, (designation of jack to operate, amount of movement, direction of movement,
When a control value is set and an operation command is output, the specified jacks operate simultaneously, and when the jack reaches the target value, the jacks automatically stop sequentially. The operating status of each jack is displayed on the personal computer 8 in a bar chart system in real time. If any of the electric screw jacks 1 exceeds a preset control value during the operation, all the jacks are stopped simultaneously. By pressing the emergency stop button of the personal computer 8 and each control device 4, all jacks can be stopped simultaneously. FIG. 2 shows an embodiment in which the present invention is applied to jack-down work on a large roof of a racetrack stand, and a steel truss girder having a length of 23 m projecting out to a height of about 30 m and the same. In the construction work of the steel-framed large roof 12 supported by the steel frame consisting of the small beams and the like between the girders, the large roof 12 is temporarily received by the temporary vent gantry 13 and the electric screw jack 1 and After the joining was completed, all the jacks were synchronized and the jacks were simultaneously jacked down, so that the large roof 12 became independent. Six jacks 1 having a total capacity of 20 t and a stroke of 250 mm were used.
The minimum control amount was 0.1 mm, and the moving speed was 0.1 to 1 mm / sec. These small control widths are made possible by using screw jacks. In FIG. 1, reference numeral 14 denotes a support, 15 denotes a working scaffold, 16 denotes a control personal computer, and 17 denotes a control cable and an electric cable. FIG. 3 shows a jack-down work flow diagram. According to the present invention, as described above, in the jack control device for civil engineering and construction, as described above, the electric screw jack is used as the jack, so that the conventional hydraulic jack is used. As compared with the above, a higher positioning accuracy can be obtained, and control by the control device is easier. Also, since the load can be held by the trapezoidal screw of the screw jack, safety is high. Further, a large number of jacks can be tuned between the jacks with high accuracy by the control device, and can be centrally controlled while constantly monitoring the operation status of all jacks. The construction accuracy is improved as compared with the case of operation and monitoring, labor saving and labor saving are achieved, and even in the unlikely event that an unexpected situation occurs, it is possible to easily take appropriate measures. Further, according to the present invention, since only the wiring of the power supply and the communication cable is required and the piping work of the hydraulic hose is not performed, the setup work is simplified as compared with the conventional apparatus using the hydraulic jack, and especially in a high place. It is effective at the time of work.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view schematically showing a jack control device in civil engineering and construction work according to the present invention. FIG. 2 is a vertical sectional side view showing an embodiment in which the present invention is applied to jack-down work on a large roof of a racetrack stand. FIG. 3 shows the jack-down work flow chart. [Description of References] 1 ... Electric screw jack, 2 ... Screw shaft, 3 ... Traveling nut, 4 ... Control device, 5 ... Geared motor, 6
... Rotary encoder, 7 ... Remote controller, 8 ... PC, 9 ... Distribution board, 10 ... Inverter, 1
DESCRIPTION OF SYMBOLS 1 ... LAN controller, 12 ... Steel roof of racetrack stand, 13 ... Vent gantry, 14 ... Support, 15
... Work scaffold, 16 ... Control personal computer, 17 ... Control cable and electric cable

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-18297 (JP, A) JP-A-5-56900 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B66F 3/46

Claims (1)

(57) [Claims 1 to support the heavy in civil and building construction
A because of the jack control device, a plurality of jacks groups configured from respective electric screw jack, the operation of each jack, stop, movement direction of the switching, Ja
A control device for measuring and monitoring the amount of movement of the jack; a tuning control for all jacks in communication with the control device;
Group control to tune by specifying jack, jack
Individual control to operate individually is possible, and each
The amount and load of the jack, or between those jacks
Monitor fluctuations and immediately exceed all
For operation and monitoring with a safety function to stop the lock
A personal computer, a geared motor of the electric screw jack, and a control device;
Supply power to the
Adjust the rotation speed of the motor by changing the frequency
And the moving speed of the screw shaft of the electric screw jack is reduced.
The distribution board to be adjustable and the communication line between the control device and the personal computer for operation and monitoring
And a LAN controller for controlling the jack controller in civil engineering and construction work.