JPH0198595A - Work monitor for tower crane - Google Patents

Abstract

PURPOSE: To enhance the safety and efficiency of a work by mounting a horizontal and vertical rotating table on a camera moving device having a drive part, which is engaged with a guide rail, and arranging a television camera thereon. CONSTITUTION: A horizontal and vertical rotating table 25 having a drive part is provided on a bracket 24 horizontally protruded from a camera moving device 13 having a drive part 12, which is engaged with two vertical guide rails 1, a television camera 26 is mounted thereon, its field of view is set to the same direction as the rotating plane of a crane arm C, and a microphone 27 is also provided thereon. According to such a structure, since the television camera 26 can be vertically moved in an elevated position by the operation of an operator on the ground, its elevation and depression angle can be changed, and the rotating angle can be also changed, the television camera 26 can be moved to a position extremely easy to see in the lifting-up of a member and its arrangement in a prescribed position. Thus, the operation of a crane can be performed, and the safety and efficiency of the work can be enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a work monitoring device for a tower crane used in steel tower assembly work and the like.

[Background Art] Tower cranes are used to assemble steel towers for power transmission lines, etc.

FIG. 6 is an explanatory diagram of an assembly operation in which a tower crane is installed, surrounding which members such as a main steel column and supports are successively connected to assemble a steel tower upward.

A tower crane installed by pouring a foundation inside a steel tower can be roughly divided into a main column part A that extends above the foundation, and a main column part A that extends above the upper surface of this main column part A, and for main column m < A. It consists of a crane part B that can be horizontally rotated by power.

The main column A can be constructed by sequentially adding partial frames to the vertical frame that forms the main column and extending it upward, or by dividing the frame forming the main column A into multiple parts, with the larger frame being the outer frame, and sequentially adding partial frames to the vertical frame that forms the main column. Insert the divided frame inside,
The large frame is fixed to the foundation, and depending on the working height of the crane, it is sequentially extended upward and fixed at a fixed position.

The crane section B consists of a vertically extending arm support section and a crane arm C. The end of the crane arm C is supported rotatably in a vertical plane at an arm support of 1 mD, and there is a wire for controlling the crane arm and for suspending loads between the tip Z11 of the crane arm C and the arm support. W is multiplied.

[Problems to be Solved by the Invention] This tower crane is operated on the ground, but currently there is no communication between the operator and the workers above using simple radios, wired telephone receivers, doorbells, etc. The work of pulling up parts and placing them in position is carried out using a combination of voice and sound signals, as well as visual signals such as hand signals and flag signals. hand signals become difficult to see visually, and
Since it is not possible to visually confirm the positional relationship between the steel tower members and the crane operator, and the positional relationship between each member, the operator must rely on voices and sounds, but the actual work does not progress that easily.

[Structure of the Invention] In order to solve the above problems, the present invention briefly provides an ITV
The system (Industrial Telecommunications System) is applied to tower cranes to provide communications that tend to rely on voice and sound signals during tower assembly work.

By adding images to the signals, the aim is to ensure more reliable communication and zero signals, and to improve work safety and work efficiency.

The ITV system consists of the following components.

(1) Imaging unit: The part directly facing the subject, including the TV camera, lens, housing that houses them, and the horizontal area where the housing is attached.ff! Consists of a direct rotation table, etc.

(2) Transmission cables: TV cameras, cables that supply power to the horizontal and vertical rotary tables, control cables for them, main boxes, cables that send captured TV signals to the image receiver, etc.

(3) Receiving unit: A monitor TV that processes and displays transmitted TV signals, a controller that remotely controls equipment in the imaging unit, etc.

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

FIGS. 1A and 1B show a side view and a front view of an embodiment of the present invention.

As already mentioned, in the tower crane, the crane KB is supported on the main column part A so that it can rotate horizontally by power, and the crane arm C is supported on the arm support part of the crane part B.
is supported so that it can rotate in a vertical plane, and the crane arm C is supported between the tip of the crane arm C and the arm support part.
Wires W for controlling and suspending the load are hung, and these wires W are controlled by sending control signals from the ground to a power device (not shown) installed on the arm support. As a result, the crane arm C rotates in a vertical plane, and the material suspension wire W is limited by the rotation of the crane arm C, the rotation of the crane part B, and the expansion and contraction of the material suspension wire W itself. It can take any spatial position within the specified range.

Two ITV river guide rails are installed perpendicularly on a surface parallel to the surface on which the crane arm C of such a tower crane rotates, that is, on the side of the arm support part that pivotally supports the crane arm C, and The period length is, for example, I
If Om, its upper end is above the pivot position of the crane arm C, and its lower end is at the main column A.

The guide rail 1 has an upper stopper 6 attached to its upper end, a lower stopper 7 attached to its lower end, and a guide rail support fitting 15. IG, guide rail fasteners 3, and if necessary, guide rail connection fittings 2 to connect the rails and support them in the vertical direction. Note that the guide rail l is provided with holes at regular intervals on its surface, as will be described later.

On the other hand, in the main pillar part A, a guide ring 4 is attached to the main pillar part A in a horizontal direction around the outer circumference of the main pillar part A at a position corresponding to the ITV guide rail 1 part. It is attached to part A.

Figure 1 (c) shows how to install the guide ring 4 in Figure 1 (a).
It is shown in the AA cross section.

At the position corresponding to this guide ring 4, guide rail 1
A guide roller slide metal rH+ is installed on the back side in the vertical direction. FIG. 2 shows an enlarged view of a portion of the guide roller slide fitting. To install the guide rail 1 in the longitudinal direction, attach the board to the guide roller slide fitting H having the groove P.
A guide roller with two rotary rollers I8 pivoted with a gap between them! 0 is the 4th guide ring for ITV with a T-shaped cross section, adjust the position and fix it with bolts and nuts in the groove.

Therefore, as the crane part B rotates, the ITV guide rail 1 is guided by the TV guide ring 4 and rotates together, but during this rotation, the ITV guide rail 1 is in a stable state for the first time. It rotates and does not cause problems such as vibration due to wind etc.

A self-propelled camera moving device +3 is installed on this ITV guide rail 1, and here, as shown in Fig. 3 (a),
The camera moving device will be explained using (2) and (3). (() is a rear view, (b) is a side view, (c) is a (
b) It is a sectional view taken along the line A-A.

Two mounting members 2 each along the ITV guide rail l
As shown in FIG.
It is rotatably supported by. Note that on the lower side, only the roller 21 is supported so as to be in contact with the rail surface.

The above guy 1' is inserted into the gap created by both rollers 21 and 21'.
Create a rail sliding part so that the front and back surfaces of the L/-ru are in contact with each other. A television camera bracket mounting plate 23 is attached to the side opposite to this sliding portion, and a television camera bracket 24 is attached to this.

The camera moving device drive unit 12 is attached to the attachment member 2o above where the camera bracket 24 is attached.

FIGS. 4(a), (0), and (c) are a top view, a side view, and a plan view of the drive section +2.

As shown in the figure, a motor 3o is built-in, and the rotational output from the motor 30 is transmitted by transmission n+M to the sprockets 3 on both sides! can be conveyed to.

On the other hand, the ITV guide rail I has holes 34 formed at regular intervals in the length direction of the rail, as shown in the plan view of FIG. has been
The sprocket 31 is engaged with the hole 34, and is connected to the rollers 32 and 33 installed in the drive unit so that the front and back surfaces of the guide rail 1 are sandwiched between the sprocket 31 and the rollers 32 and 33 installed in the drive unit.

With this configuration, the driving force from motor 1 is used to move the camera [+3 is the ITV river camera]! It can be moved up and down along.

A horizontal and vertical rotary table 25 equipped with a drive unit driven by power on a bracket 24 that projects horizontally from the camera moving device I3.
is attached, and the television camera 2B is attached to this turntable 25. The television camera 2G is usually placed so that its field of view is in the same direction as the plane of rotation of the crane arm C. Note that a microphone 27 is attached to the television camera 2G. According to this configuration, operations by a crane operator on the ground can
The television camera 2G can be moved up and down at a high place, and the elevation angle and depression angle of the television camera 26 can be changed, as well as the rotation angle, so when pulling up a member and placing it in a predetermined position. This allows the TV camera to be moved to a position where it can be seen easily, which allows the crane to be operated.

[Effects of the Invention] According to the apparatus of the present invention, a television camera can detect a person's
Instead of 1, by accurately displaying the situation, by adding images to communication and signals that tend to rely on voice and sound in high-place, dangerous work such as steel tower assembly work,
This allows for more reliable communication and thorough signaling, allowing for accurate tower crane operation, and increasing the efficiency of this type of work.

[Brief explanation of the drawing]

FIG.
Guy guide ring for V. FIG. 2 is an explanatory diagram of the guide roller slide fitting and the coupling between the guide roller and the guide ring. FIG. 3(4) is a rear view of the camera moving device, FIG. 3(b) is a side view, and FIG. 3(c) is a sectional view taken along the line A-A in FIG. FIG. 4 shows the drive unit attached to the camera moving device,
(The inside view is a top view, (a) ryJ is a side view, and (c) is a plan view. Figure 5 is a guide rail for ITV, (a) is a plan view, (C0 view is ( B) It is a sectional view taken along the line A-A in Figure 6. Figure 6 is an explanatory diagram of the steel tower assembly work using a tower crane. 1... ITV guide rail, 4... ITV guy guide ring 0... Guide roller, +2... Camera moving device drive unit, +3... Camera moving device. 5 mouth (in (mouth)

Claims (1)

[Claims] (1) Attach two guide rails vertically to the horizontally rotating crane part of the tower crane, engage a camera moving device with a drive unit to the guide rails, and attach a horizontal and vertical rotation table to the camera moving device. A work monitoring device for a tower crane characterized by an attached television camera.