JPH0798633B2 - Work monitoring equipment for tower cranes - Google Patents

Description

TECHNICAL FIELD 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 lines.

FIG. 6 is an assembly work explanatory diagram in which a tower crane is installed, main iron columns, columns, and other members are sequentially connected to surround the tower crane and an iron tower is assembled upward.

A tower crane arranged by placing a foundation inside a steel tower is roughly classified into a main pillar portion A extending upward from the foundation and extending above the upper surface of the main pillar portion A, and a power is applied to the main pillar portion A. It consists of a crane section B that can rotate horizontally.

For the main pillar portion A, partial frames are sequentially added to the vertical direction frame forming the main pillar portion and extended upward, or the frame forming the main pillar portion A is divided into a plurality of frames, and the large frame is set to the outer side. A method is employed in which a frame divided into the inside is fitted, the large frame is fixed to a foundation, and the frame is sequentially extended upward and fixed at a fixed position according to the working height of the crane.

The crane part B is composed of a vertically extending arm support part D and a crane arm C. The end of the crane arm C is pivotally supported on the arm support D so as to be rotatable in a vertical plane, and a wire for controlling the crane arm and suspending the load material is provided between the tip of the crane arm C and the arm support D. W is multiplied.

[Problems to be Solved by the Invention] Although the operation of this tower crane is performed on the ground, between the operator and the worker above, a simple wireless device, a wired handset, a caller, etc. are currently being used. The members are pulled up and the members are placed at fixed positions by using the voices, sounds, or visual cues such as hand cues and flag cues, but as a characteristic of the assembly work, the work position gradually increases. Since it is moved to, it is difficult to visually recognize the cues, and since the positional relationship between the tower members and the crane operator and the positional relationship between the members cannot be visually confirmed, they rely on voice and sound. The actual work does not proceed so easily.

[Structure of the Invention] In order to solve the above problems, the present invention is applied to an ITV system (industrial television system) for a tower crane, and tends to rely on a voice or sound signal in a steel tower assembly work. , Contact. More reliable communication by adding video to the signal. The purpose is to make sure that the signal is thorough, work safety, and work efficiency.

The ITV system has the following configuration.

(1) Imaging unit: A part that directly faces the subject, such as a television camera, a lens, a housing for housing them, and a horizontal surface for mounting the housing. It consists of a vertical turntable.

(2) Transmission unit: a TV camera, a cable that supplies power to the horizontal and vertical rotary bases, a control cable to them, a main box, a cable that sends the imaged TV signal to the image receiving unit, etc.

(3) Image receiving unit: A monitor television that processes the transmitted television signal and displays it, a controller for remotely controlling the device of the image capturing unit, and the like.

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

1 (a) and 1 (b) show a side view and a front view of this embodiment.

As described above, the tower crane is supported on the main pillar portion A so that the crane portion B can be horizontally rotated by the power, and the crane arm C is mounted on the arm support portion D of the crane portion B.
Is rotatably supported in a vertical plane, and the crane arm C is provided between the tip of the crane arm C and the arm support part D.
Wires for controlling and for suspending the load material are hung, and these wires W are controlled by sending a control signal from the ground to a power unit (not shown) installed on the arm support D, As a result, the crane arm C rotates in a vertical plane, and the load material suspending 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 load material suspending wire W itself. Any spatial position can be taken within the range.

Two ITV guide rails 1 are vertically attached to a surface parallel to a surface on which the crane arm C of the tower crane rotates, that is, a side surface of an arm support portion D that pivotally supports the crane arm C. For example, the length is 10m
If so, the upper end thereof is above the axially stopped position of the crane arm C, and the lower end thereof is at the main pillar portion A.

The guide rail 1 has an upper stopper 6 attached to the upper end and a lower stopper 7 attached to the lower end. The rails are connected by guide rail support fittings 15 and 16, guide rail stoppers 3, and guide rail connecting fittings 2 if necessary. And then supported vertically. The guide rail 1 has holes on its surface at regular intervals as described later.

On the other hand, at the position corresponding to the lower portion of the ITV guide rail 1 in the main pillar portion A, the guide ring 4 is arranged in the horizontal direction of the outer circumference of the main pillar portion A by the guide ring support fitting 14 and the guide ring connecting fitting 5 to form the main pillar portion. Attached to part A.

Fig. 1 (c) shows how to install the guide ring 4 in Fig. 1 (a).
The AA cross section of FIG.

At the position corresponding to this guide ring 4, the guide rail 1
A guide roller slide fitting 11 is attached to the back side of the above in the vertical direction. FIG. 2 shows an enlarged view of the guide roller slide fitting 11 part. A guide roller slide fitting 11 having a mounting groove P in the lengthwise direction of the guide rail 1 is provided with two guide rollers 10 pivotally supported on a base plate 17 with a gap between them, and a guide roller 10 having a T-shaped cross section for ITV guide ring. Fit in 4,
Adjust the position and fix with bolts and nuts in the mounting groove.

Therefore, according to the rotation of the crane part B, the ITV guide rail 1 is guided by the ITV guide ring 4 and integrally rotates, but at the time of this rotation, the ITV guide rail 1 rotates in an extremely stable state and winds. There is no problem such as vibration caused by the above.

A self-propelled camera moving device 13 on this ITV guide rail 1
Is attached, but here in Fig. 3 (a),
The camera moving device will be described with reference to (b) and (c). (A) is a rear view, (B) is a side view, and (C) is a sectional view taken along the line A-A in (A).

At two locations on the lower back side of the two mounting members 20 along the ITV guide rail 1, as shown in FIG. A pair of rollers 21 'is rotatably supported by the support portion 22. On the lower side, only the roller 21 is supported so as to contact the rail surface.

The rail sliding portion is formed by bringing the front and back surfaces of the guide rail 1 into contact with the gap formed by the rollers 21, 21 '.
On the side opposite to this sliding part, the TV camera bracket mounting plate 23
Is attached to the TV camera bracket 24.

The camera moving device driving unit 12 is attached to the attachment member 20 on the upper side where the camera bracket 24 is attached.

4 (a), (b) and (c) are a top view, a side view and a plan view of the drive unit 12.

A motor 30 is built in as shown in the figure, and the rotation output from the motor 30 is transmitted to the sprockets 31 on both sides by a transmission mechanism.

On the other hand, the ITV guide rail 1 is a plan view of FIG.
(A) As shown in (b), which is a cross-sectional view taken along the line A-A in FIG. 3, holes 34 are formed at regular intervals in the length direction of the rail, and the sprocket 31 is engaged with the hole 34 and is driven with the hole 34. The guide rail 1 is joined between the rollers 32 and 33 installed in the section so as to sandwich the front and back surfaces of the guide rail 1.

With this configuration, the camera moving device 13 can be moved vertically along the ITV guide rail 1 by the driving force from the motor 1.

Bracket 24 protruding horizontally from the camera moving device 13
Horizontally equipped with a drive unit by power. A vertical turntable 25 is attached, and a television camera 26 is attached to the turntable 25. The television camera 26 is usually placed so that its field of view is in the same direction as the plane of rotation of the crane arm C. TV camera 26
A microphone 27 is attached to this. According to such a configuration,
By operating a crane operator on the ground, the TV camera 26 can be moved up and down at a high place, and the elevation angle and depression angle of the TV camera 26 can be changed, and the rotation angle can also be changed. In the case of pulling up and arranging at a predetermined position, the TV camera can be moved to a position where it is extremely easy to see, and thereby the crane can be operated.

[Effects of the Invention] According to the device of the present invention, the TV camera correctly displays the work situation in place of the human eye, so that voices and sounds can be relied upon in work involving heights and danger such as tower assembly work. By adding a video to the contact and signal, more reliable communication and signal can be ensured, the tower crane can be operated accurately, and the efficiency of this kind of work can be improved.

[Brief description of drawings]

FIGS. 1 (a) and 1 (b) are a side view and a front view of an embodiment of the present invention, and FIG. 1 (c) is an IT shown in section (a) in FIG.
The guide ring for V is shown. FIG. 2 is an explanatory view of the combination of the guide roller slide fitting, the guide roller and the guide ring. FIG. 3 (A) 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 a drive unit attached to the camera moving device,
(A) is a top view, (B) is a side view, and (C) is a plan view. FIG. 5 shows the ITV guide rail, in which (a) is a plan view and (b) is a sectional view taken along the line A-A in (a). FIG. 6 is an explanatory view of a steel tower assembling work using a tower crane. 1 …… ITV guide rail, 4 …… ITV guide ring, 10
...... Guide roller, 12 …… Camera moving device drive, 13
...... Camera moving device.

Front page continuation (72) Inventor Kura Nozawa 1-3-3 Uchisaiwaicho, Chiyoda-ku, Tokyo Tokyo Electric Power Company (72) Inventor Tetsuyo Asami 1-3-1 Uchiyuki-cho, Chiyoda-ku, Tokyo Tokyo Electric Power Company Co., Ltd. (72) Inventor Haruhiko Hirata 1-3-1 Uchisaiwaicho, Chiyoda-ku, Tokyo Tokyo Electric Power Co., Inc. (72) Inventor Yasuo Bando 4-1-1 Yushima, Bunkyo-ku, Tokyo Stock Corporation (72) Inventor Osamu Esei 1-15-9 Ikebukurohonmachi, Toshima-ku, Tokyo Daiko Electric Industry Co., Ltd. (72) Inoue Kyo-shi 4-23 Takanawa, Minato-ku, Tokyo Shinagawa Station Building Daito Dengyo Co., Ltd. (72) Inventor Tetsuo Fukano 1-10-4 Okubo Shinjuku-ku, Tokyo Takada Electric Co., Ltd. (72) Inventor Iwao Takahashi 3-6-9 Wholesale Town, Sendai City, Miyagi Northern Japan Sony Services Co., Ltd. (72) Inventor Keisaku Ibata 20th station of Kitagawara, Itami, Hyogo 2 Within Asahi Metal Seiko Co., Ltd. (56) References: 62-176346 (JP, U)

Claims (1)

[Claims] 1. A horizontally moving crane part of a tower crane, in which a guide rail is attached in a vertical direction, a camera moving device having a driving part is engaged with the guide rail, and the camera moving device is horizontally moved. A work monitoring device for tower cranes, which is equipped with a vertical turntable and a TV camera.