JP3184777U - Crane boom approach prevention device - Google Patents

Abstract

[PROBLEMS] To detect with high accuracy a crane boom of a large work crane used at a railway maintenance site or the like, without contacting the high-voltage transmission line or the like, and the crane boom approaching a predetermined range of the high-voltage transmission line. Provided is a crane boom approach prevention device that can accurately perform safety confirmation during crane work.
A laser scanner is attached to the vicinity of a tip of a crane boom, and a laser beam emitted from a laser light emitting portion of the laser scanner is formed on a radial laser barrier having a two-dimensional shape by a lens system, and the laser barrier is formed. Is formed in a direction perpendicular to the ground, and the reflected light of the laser beam reflected from the object within the laser barrier is received by the laser light receiving unit and converted into a voltage, thereby converting the voltage output into sound or light. The alarm is output as an alarm sound or an alarm light from an alarm output interface provided at a remote location such as the operator room 3 of the crane.
[Selection] Figure 1

Description

  The present invention provides a crane boom approach prevention device for preventing an object to be monitored such as a high-voltage power transmission line from coming into contact with a boom (hereinafter referred to as a “crane boom”) provided in a working crane. About.

  For example, when operating a large work crane at a railway maintenance site or the like, it is necessary to prevent the crane boom from coming into contact with a high-voltage power transmission line or the like near the maintenance site. For this reason, conventionally, an instructor on the track maintenance site visually monitors the movement of the crane, and when the crane boom approaches the high-voltage power transmission line or the like, the guider issues a warning to the crane operator. To prevent contact accidents.

  However, when the crane boom contact accident is prevented by monitoring the guide, it is necessary to prevent the contact accident from occurring due to human error such as carelessness. Therefore, conventionally, techniques for detecting a dangerous state by using various sensors have been developed.

  Here, considering such a conventional technique, for example, the moving object collision prevention method described in Patent Document 1 emits a laser beam from a laser barrier generator attached to the mobile crane of the mobile crane. In this way, a laser barrier is formed around the boom, and another object in contact with the laser barrier is detected.

  However, since the detection method described in the above-mentioned document is designed so that the laser barrier generator is attached to the crane vehicle side, the crane boom is extended, or the detection object has a small diameter such as a high-voltage power transmission line. In this case, it is difficult to detect accurately, and it is impossible to prevent an accident associated with crane operation.

  Conventionally, a method of forming a laser barrier around a high-voltage power transmission line by installing a laser scanner on the ground side of the site and emitting a laser beam has been adopted. However, in this method, if the reference position of the warning area by the laser beam emitted from the laser scanner is set at the bottom of the high-voltage transmission line, the high-voltage transmission line hangs in a curved shape between the steel towers. Inconveniently, the detection operation cannot be performed accurately at a portion close to the point.

JP-A-10-95593

  As described above, the present invention is designed so that the crane boom of a large work crane used at a railway maintenance site or the like does not come into contact with an object to be monitored such as a high-voltage power transmission line. An object of the present invention is to provide a crane boom approach prevention device that reliably performs safety confirmation during crane work by performing high-precision detection of approaching an object such as a high-voltage power transmission line.

  In order to solve the above problems, the crane boom approach prevention device according to claim 1 of the present invention is a crane boom approach prevention device using a laser scanner that detects the presence of an object to be monitored, such as a high-voltage power transmission line. The laser scanner is attached to the vicinity of the tip of the crane boom, the laser beam emitted from the laser light emitting part of the laser scanner is formed into a two-dimensional radial laser barrier by a lens system, and the laser barrier is An operator room of a crane is formed by converting a voltage output, which is formed in a vertical direction, reflected from a laser beam reflected from an object within the laser barrier by a laser light receiving unit and converted into a voltage to sound or light. The alarm output interface provided at a remote location such as a warning sound or warning light is output. To.

  According to a second aspect of the present invention, the crane boom approach preventing apparatus according to the first aspect of the present invention converts the reflected light detected from the laser barrier by the laser light receiving portion of the laser scanner attached near the tip of the crane boom into a voltage. The voltage output is transmitted to a receiving device provided in a remote place such as an operator room of a crane by a wired or wireless system.

  The crane boom approach prevention device of the present invention can move the laser scanner along with the movement of the crane boom by attaching the laser scanner in the vicinity of the tip of the crane boom, thereby detecting the crane boom with the laser scanner. Instead, it is possible to detect an object such as a high-voltage power transmission line with a laser scanner.

  In particular, in the case of a crane, the distance between the operator room and the vicinity of the tip of the crane boom changes as the crane boom expands and contracts. As described above, even when the object has a small diameter, it is possible to accurately detect the presence of the object that has entered the laser barrier without being affected by the expansion and contraction operation of the crane boom.

  Further, as in the present invention, a laser scanner is attached in the vicinity of the tip of the crane boom, and a laser beam emitted from the laser light emitting portion of the laser scanner is formed into a two-dimensional radial laser barrier by a lens system. Can be formed perpendicular to the ground. As a result, a wide detection range perpendicular to a linear object such as a high-voltage power transmission line can be secured, and the detection performance by the laser beam can be efficiently exhibited.

  Furthermore, when a laser scanner is attached in the vicinity of the tip of the crane boom and the laser scanner and an alarm output interface in the operator room are connected by wire, the wire such as a cable cannot cope with the extension / contraction operation of the crane boom. For this reason, by connecting the laser scanner and the alarm output interface of the operator room in a wireless manner, the signals detected accurately by the laser scanner near the tip of the crane boom are not affected by the expansion and contraction of the crane boom. It is possible to transmit to a receiving device provided at a remote location.

  Thereby, even when the operator of the crane concentrates the line of sight on the crane work, the approach of the object to be monitored such as the high-voltage power transmission line approaching the crane boom can be detected by the warning sound or the warning light. It becomes possible to prevent dangers.

It is the whole crane side view which shows the condition which attached the laser scanner of the crane boom approach prevention apparatus by this invention to the front-end | tip vicinity of a crane boom. It is the elements on larger scale which show the condition which attached the laser scanner of the crane boom approach prevention apparatus by this invention to the front-end | tip vicinity of the crane boom. It is the schematic which shows the whole structure of the crane boom approach prevention apparatus by this invention. It is a block diagram which shows the structure and operation | movement of the crane boom approach prevention apparatus by this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the crane boom approach prevention device of the present invention has a laser scanner 1 attached in the vicinity of the tip of a crane boom 2, and a laser beam emitted from the laser light emitting part of the laser scanner 1 is two-dimensionalized by a lens system. The laser barrier 4 is formed in a radial direction, and the laser barrier 4 is formed in a direction perpendicular to the ground.

  2, the attachment position of the laser scanner 1 attached in the vicinity of the tip of the crane boom 2 is also affected by the tip structure of the crane boom 2, so that the tip structure of the crane boom 2 to which the laser scanner 1 is to be attached. In consideration of the above, it is preferable that the crane boom 2 is attached at or near the tip of the crane boom 2 as much as possible.

  In such a configuration, as shown in FIG. 3, the laser scanner 1 has a laser light emitting unit that emits a laser beam and a laser light receiving unit that receives the reflected light of the laser beam, and the laser beam reflected by the object is reflected. The reflected light is received by the laser light receiving unit and converted into voltage, and the voltage output is converted into sound or light, so that an alarm sound or lamp such as a buzzer sound is output from the alarm output interface 5 provided in the operator room 3 of the crane. Output as warning light such as light.

  Further, in the laser scanner 1 mounted near the tip of the crane boom 2 as described above, the laser beam emitted from the laser emitting unit is formed as a two-dimensional radial laser barrier 4 by the lens system, and this laser barrier 4 is formed. They are formed perpendicular to the ground. For this reason, the laser scanner 1 diffuses the laser beam emitted from the laser light emitting portion in the radial direction by the lens system, thereby generating the laser barrier 4 that is radially diffused in two dimensions around the laser light emitting portion. I have to.

  As a laser scanner having the above-described configuration, for example, as a (not shown for violation of public order and morals) (hereinafter referred to as “laser scanner of the present embodiment”), the weight of the main body is as small as about 1.5 kg. It is necessary to use a lightweight laser scanner. When a small and lightweight laser scanner is installed in the vicinity of the tip of the crane boom in this way, it is possible to carry out the crane work without affecting the crane boom structure and without affecting the crane boom operation. is there.

  The laser scanner of this embodiment has two switching fields as field settings, a switching field range of 20 m at the maximum, a scanning angle of 270 °, and a switching output of three circuits.

  In addition, as shown in FIG. 4, the laser scanner of the present embodiment is set by a personal computer (PC) from the outside so that the maximum switching field range, each switching field range, the scanning angle, the scanning shape, etc. It is possible to make changes.

  Furthermore, since the laser scanner of the present embodiment has a wide scanning angle as described above, even if the boom angle changes, the high-voltage power transmission line does not come off from the detection area, and the laser scanner detects the high-voltage power transmission line. Can be built.

  In addition, since the laser scanner of this embodiment has low power consumption, it can be driven by a battery, and an alarm output signal is wirelessly transmitted to an alarm output interface provided in a remote location such as an operator room or other management room. It can be skipped. For this reason, it becomes possible to attach the laser scanner of a present Example to the crane boom of a hydraulic rough terrain crane like the crane boom which expands / contracts. In addition, when installed and used on site, operation with a solar battery is possible depending on conditions, and operation in a place where it is difficult to secure a power supply is also possible.

  The crane boom contact prevention device of the present invention can be used not only for the purpose of preventing the crane boom contact with the high-voltage power transmission line but also for the purpose of preventing the crane boom contact with the bridge pier in the work under the overhead.

  Further, in the present invention, as shown in FIGS. 3 and 4, the alarm output interface 5 provided in the operator room 4 of the crane by converting the voltage output detected by the laser light receiving portion of the laser scanner 1 into sound or light. Is output as alarm sound such as buzzer sound or alarm light such as lamp light. The alarm output interface 5 is connected to a power supply 5, and the power supply 5 is also supplied to the laser scanner 1.

  With the above configuration, as shown in FIG. 1 or FIG. 2, the laser scanner 1 is attached near the tip of the crane boom 2, and a laser beam is emitted in a direction perpendicular to the ground from the laser light emitting unit of the laser scanner 1. As a result, the reflected light reflected by the laser beam hitting an object such as a high-voltage power transmission line existing in the laser barrier within a predetermined range is received by the laser receiving unit of the laser scanner 1, and the voltage detected by this laser receiving unit. The output can be converted into sound or light and output from the alarm output interface 5 provided in the operator room 4 as an alarm sound or alarm light.

  Therefore, unlike the conventional danger monitoring by the monitor TV or the like, the operator in the operator room 4 has approached the crane boom even when the line of sight is concentrated on the crane work. The presence / absence of an object can be detected by an alarm sound or an alarm light, and danger can be prevented beforehand.

  The crane boom approach prevention device of the present invention is designed to prevent the crane boom of a large work crane used at a railway maintenance site from coming into contact with an object to be monitored such as a high-voltage transmission line. It can be used as a crane boom approach prevention device that reliably performs safety confirmation during crane work by accurately detecting the boom approaching an object such as a high-voltage power transmission line.

1 Laser scanner 2 Crane boom 3 Operator room 4 Laser barrier 5 Alarm output interface 6 Power supply

As the laser scanner having the above configuration, it is necessary to use a small and light laser scanner (hereinafter referred to as “laser scanner of this embodiment”). When such a small and light laser scanner is installed near the tip of the crane boom, it does not place a burden on the structure of the crane boom, and it is possible to perform crane work without affecting the operation of the crane boom. is there.

Claims (2)

In a crane boom approach prevention device using a laser scanner that detects the presence of an object to be monitored such as a high-voltage power transmission line,
A laser scanner is attached in the vicinity of the tip of the crane boom, and a laser beam emitted from the laser emission part of the laser scanner is formed into a two-dimensional radial laser barrier by a lens system, and the laser barrier is perpendicular to the ground. The reflected light of the laser beam reflected from the object in the laser barrier is received by the laser light receiving unit and converted into voltage, and converted into sound or light. A crane boom approach prevention device characterized in that an alarm sound or warning light is output from an alarm output interface provided at a remote location. Reflected light detected from inside the laser barrier is converted into voltage by the laser receiving part of the laser scanner attached near the tip of the crane boom, and the voltage output is provided at a remote location such as an operator room of the crane by wire or wireless method. The crane boom approach prevention device according to claim 1, wherein the crane boom approach prevention device is transmitted to a receiving device.