KR20190032759A - A Crane Hook Having Auto-Alarming Device In Accordance With A Distance From An Object of Collision - Google Patents

Abstract

The present invention relates to a crane hook having an automatic alarm device to automatically control the volume of an alarm in accordance with a distance from a collision object. The crane hook having an automatic alarm device according to the present invention includes: a collision object sensing unit for sensing existence of a collision object and directly measuring a distance from the collision object; an alarm device for generating an alarm; and a control unit for receiving the measured distance from the collision object sensing unit and controlling the alarm device. The control unit operates the alarm device to generate an alarm if there is a risk of collision since a measurement distance is shorter than a previously set distance, controls the volume of the alarm according to the measured distance, and stops operation of the alarm device if there is no change in measurement distance. The crane hook having an automatic alarm device according to the present invention can directly sense the collision object, such as persons, the ground surface, or structures, with which the crane hook may collide actually, and directly measure a collision direction and a collision distance and generate an alarm by stages according to the measured distance, thereby generating an alarm within an actual collision range.

Description

[0001] The present invention relates to a crane hook having an automatic alarm device in which the size of an alarm is automatically adjusted according to a distance from a collision object,

The present invention relates to a crane hook, and more particularly, to a crane hook having an automatic alarm device in which the distance to a collision object is directly measured and the size of the alarm is automatically adjusted according to the distance to the collision object.

Large construction sites such as large construction sites or shipyards use large cranes such as tower cranes, hydro cranes, and crawler cranes to move the material to the desired location. The characteristics of such a large crane are that the cockpit is located at a high distance far from the ground so that the adjuster can see the wide area and move the material to a desired location. The hook is moved up and down with a considerable height according to the height of the large crane, Move. Therefore, a pilot operating a large crane may not be able to properly identify an operator working on the ground because the ground and the cockpit are far away. If the coordinator fails to identify the worker's position and descends the hook close to the worker's location, the ground operator will not be able to detect the hook from the sky and will be hurt or hurt by hooks, A safety accident is occurring.

Various techniques have been proposed to solve these problems. For example, Laid-open Patent Application No. 10-2010-0104107 relates to an alarm device for a crane hook, wherein a cockpit operated at a construction site or a production site is attached to a hook of a large crane placed at a height, And to recognize that the hook is lowered to an operator on the ground, thereby preventing a safety accident of an operator. In other words, a controller for operating the alarm according to the detection signal of the rotation direction of the sheave when the hook is lowered by the detector detects a direction of rotation of the sheave constituted by the crane hook, and a controller And an alarm for generating a warning sound and warning light is attached to the hook.

Japanese Patent Application Laid-Open No. 10-1638042 relates to an automatic alarm device that warns when the hook of a tower crane ascends and descends. A magnetic chip, which is a magnetic body, is attached to one side of a rope wheel in a hook pulley. The central control unit determines that the hook is lifted and lowered when a signal is inputted from the magnetic hole sensor unit, and transmits the signal to the operator through the speaker, It is possible to call attention of the user.

However, there is still a high demand for techniques to prevent or reduce accidents caused by crane hooks at the work site.

1. Patent Publication No. 10-2010-0104107 (Sep. 29, 2010) 2. Registration Patent Publication No. 10-1638042 (Jul.

An object of the present invention is to provide a crane hook having an automatic alarm device in which the strength of an alarm is automatically adjusted according to the distance to a collision object.

According to an aspect of the present invention, there is provided a collision object detection unit for detecting the presence of a collision object and directly measuring a distance to the collision object, an alarm device for generating an alarm, The control unit generates an alarm by activating the alarm device when there is a risk of collision because the measurement distance is shorter than the preset input distance and controls the intensity of the alarm according to the measurement distance, It may be a crane hook that stops the operation of the alarm device.

The collision object sensing unit may include a distance sensor that measures a distance to the collision object.

The measurement range of the distance sensor may be 10 m to 100 m.

The distance sensor may include an infrared distance sensor or a microwave distance sensor.

The present invention may further comprise a wireless communication device for transmitting the collision risk information received from the collision object sensing unit to the crane driver or the remote manager under the control of the control unit.

According to the present invention, it is possible to provide a crane hook having an automatic alarm device in which the intensity of an alarm is automatically adjusted according to the distance to an object to be collided.

In addition, by directly detecting the collision object (person, ground, structure) that may actually collide with the crane hook, and by directly measuring the direction and distance of the collision object, Can operate.

In addition, since the strength of the alarm is automatically adjusted according to the measured distance, it is possible to eliminate the inconvenience that the operator or the crane driver directly adjusts the volume, and when the crane hook is stopped, the volume is automatically canceled temporarily, The inconvenience due to noise can be solved.

In addition, collision risk information (alarm operation state) such as measurement distance and direction can be wirelessly transmitted to a remote tower crane driver or manager, which can be helpful for steering and management of the tower crane driver.

1 is a schematic diagram schematically showing the movement (turning, rising, falling, forward, and backward) of a crane hook when a material is transported.
2 is a schematic diagram showing the maximum detection distance D to the crane hook and the collision object.
3 is a schematic diagram showing the principle of measuring the distance between the crane hook and the collision object.
4 is a photograph of a crane hook according to an aspect of the present invention.
5 is a flow chart schematically illustrating an operation sequence of a crane hook according to an aspect of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings may be exaggerated for clarity of description, and the elements denoted by the same reference numerals in the drawings are the same elements.

The present invention relates to a crane hook provided with an automatic alarm device in which the size of an alarm is automatically adjusted according to the distance to a collision object.

1 is a schematic diagram schematically showing the movement (turning, rising, falling, forward, and backward) of a crane hook when a material is transported. 2 is a schematic diagram showing the maximum detection distance D to the crane hook and the collision object. 3 is a schematic diagram showing the principle of measuring the distance between the crane hook and the collision object. 4 is a photograph of a crane hook according to an aspect of the present invention. 5 is a flow chart schematically illustrating an operation sequence of a crane hook according to an aspect of the present invention.

A crane is a mechanism that lifts an object and carries it up, down, left, right, front, and back. There is a wheel type and a track type depending on the moving mode. Referring to FIG. 1, the crane in the present invention may be a tower crane or a crawler crane. But not limited to, goliath crane and overhead crane (hoist). For example, in the case of a tower crane, a trolley 102 is mounted on the jib 103 to reciprocate horizontally, and a crane hook 100 is mounted on the trolley 102 via a wire 101, And can be rotated by the turning of the cockpit 104 mounted on the mast 105. [ In the crane hook 100, the construction material can be hung and moved to another place. The crane hook 100 may include a drum (not shown) in which the wire 101 is wound and a rotating motor (not shown) capable of rotating the drum.

Referring to FIG. 2, when a worker, a facility, or the like is located on the lower side or the side of the crane hook, there is a high possibility that the worker or the facility may spread by accident due to a collision with the crane hook. If the distance to the worker or facility located on the lower side or the side of the crane hook is measured and if it is close to the risk of collision, an alarm is generated and the worker or the crane driver is cautioned to stop the work to prevent the accident There is a need.

The present invention is characterized in that a crash object detection unit, a control unit, and an alarm device are mounted on a crane hook. When the operator or the facility is detected by using the collision object detection unit and the distance is measured, if the measured distance is shorter than the predetermined distance, the warning apparatus can be operated to call attention of the operator or the coordinator.

In addition, when the measurement distance becomes shorter, the alarm sound can be adjusted by the measurement distance step. If it is detected that a person (including an object, structure, ground, etc.) exists in the traveling direction of the crane hook and the measured distance is shorter than the predetermined distance D, an alarm device attached to the crane hook is operated, It is possible to induce the operator in the proceeding direction to pay attention. At this time, the volume of the voice or siren alarm device decreases as the distance approaches, and if the crane hook is stopped even if the distance is within the detection distance (D), the volume can be minimized or the sound can be temporarily canceled. Conversely, the closer the distance is, the greater the volume and the greater the risk.

For example, it is possible to control the volume to be large at a long distance, the volume to be low at a short distance (automatic alarm volume control), and temporarily silence the volume automatically when the crane hook is stopped. Specifically, when the maximum sensing distance is 20 m, the sound volume of the alarm sound is controlled to 30% when the measurement distance is 0 m to 5 m, and the sound volume of the alarm sound is set to 70% when the measurement distance is 6 m to 10 m And the sound volume of the alarm sound is controlled to 90% when the measurement distance is 11 m to 15 m and the sound volume of the alarm sound is controlled to be 100% when the measurement distance is 16 m to 20 m, , The volume of the alarm sound can be controlled to 0%.

As another example, the alarm can be set to operate when the distance between the crane hook and the object to be collided is within 15 m. If the measurement distance is 15m to 10m, the sound volume of the alarm sound is 100%. If the measurement distance is 10m to 5m, the volume of the alarm sound is 80%. If the measurement distance is 5m or less, Is set to 50%, and alarm sound such as "Hook descends, please be careful" is set. If the crane hook does not move for more than 2 seconds, the volume of alarm sound can be set to 10%. In this case, when the crane hook descends and a person is detected 15 meters below the alarm, the alarm sound is guided to 100% of the volume. As the crane hook is lowered, the alarm sound is decreased. When the crane hook is stopped for more than 2 seconds The volume can be operated at 10%.

In the past, the volume of the alarm sound was physically controlled by the control switch. This was because it was impossible to control the volume when the crane hook was in the air, and it was inconvenient to adjust the crane hook after it was brought close to the ground , And these inconveniences were solved.

According to an aspect of the present invention, there is provided a collision detection apparatus comprising: a collision object sensing unit that detects the presence of a collision object and directly measures a distance to the collision object; an alarm device that generates an alarm; The control unit generates an alarm by activating the alarm device when the measurement distance is shorter than the predetermined input distance and controls the intensity of the alarm according to the measurement distance, And may be a crane hook that stops the operation of the alarm device when there is no change. This is a method to directly measure the distance between the crane object and the crane hook.

Conventionally, a motion sensor (acceleration sensor, gyro sensor, altitude sensor, etc.) and a vibration sensor are attached to a crane hook to detect the movement of a crane hook and an alarm is sounded. The ultrasonic sensor for a vehicle has a sensing distance of 2 m to 5 m (The detection distance of the distance sensor should be about 10m to 20m), the laser sensor is expensive, and the Class 2 laser can affect the human eye, which makes it difficult to use.

The collision object detection unit is provided on the crane hook, and can sense the collision object and measure the distance between the crane hook and the collision object. The collision object detection unit may include various sensors capable of detecting an operator, a facility, and the like within a predetermined distance from the crane hook. It is preferable to use a non-contact type sensor because the presence of the collision object must be detected even when the crane hook does not collide with the collision object. As such a non-contact type sensor, for example, an infrared LED sensor using an infrared ray which is not harmful to the eyes or a microwave sensor using a microwave can be used. However, it is not necessarily limited thereto.

The direction of the non-contact sensor can be determined in consideration of the travel path of the crane hook, and the sensor can be mounted on the crane hook. That is, the direction of the sensor can be arranged so as to face the traveling path of the crane hook in order to detect whether there is an object to be collided such as an operator or a facility on the path of the crane hook. For example, in the case of a tower crane, the crane hook moves up and down. However, since the collision object such as an operator or a facility is generally located under the crane hook, the direction of the sensor can be arranged to face downward of the crane hook . Since the crane hook also moves horizontally along the longitudinal direction of the jib, it is also possible to arrange the sensor so that the longitudinal direction is along the longitudinal direction of the jib. If the movement path of the crane hook can not be specified, a plurality of sensors may be arranged in a direction to be radiated around the crane hook. However, the present invention is not limited to this, and various sensors can be arranged according to work conditions and the like so that an object to be collided such as an operator or a facility can be effectively detected.

Using the non-contact sensor, the distance between the collision object and the crane hook can be measured by the TOF (Time of Flight) principle. 3 shows an infrared sensor as an example. Referring to FIG. 3, infrared light is irradiated from the LED light emitting portion and infrared light is reflected by a collision object (person or object) in a receiving portion (light receiving portion). It is a principle to detect the distance and velocity between the sensor and the object to be collided by detecting the displacement of the wavelength reflected on the object to be collided by injecting harmless infrared light into the human eye. It is possible to measure the presence of the collision object, the distance from the collision object, and the moving speed of the crane hook by measuring the time taken for the irradiation and detection of the infrared ray and the wavelength change of the infrared ray. A sensor that uses a microwave instead of an infrared ray may be used.

The measurable range of the distance sensor is preferably 10 m or more. This means the upper limit of the measurable distance. Naturally, it can be detected within 10m. For example, the presence of a collision object can be detected even when the collision object is at 15 m. The collision object can be detected from the distance of 10 m or more, so that the collision accident can be prevented in advance. In other words, when the crane hook moves from the distance toward the operator, it detects the movement of the crane hook in advance and sounds an alarm, so that the accident can be prevented in advance. If the collision object can be detected only within a distance of less than 10 m, the distance between the collision object and the crane hook is too short, which can prevent the operator from avoiding the collision, which can be prevented.

The measurable range of the distance sensor is preferably within 100 m. Detecting a collision object at a distance of more than 100 meters may be technically difficult in practice, and even if it is implemented, the cost may be too high to be practically usable. In view of the object of the present invention to prevent a collision between a crane hook and a collision object (an operator or a fixture), it may be practically meaningless to detect a collision object located over 100 meters. More preferably 10 m to 30 m.

The alarm device 3 may be a device that generates a warning sound. However, the present invention is not limited to this, and may be a beacon for generating light. It is also possible to increase the warning effect by using a combination of a warning sound and a warning light. Specifically, as an alarm device, a voice guidance speaker, a buzzer, a siren, a warning light, an LED illumination, and the like can be used singly or in combination.

This aspect may further include a wireless communication device. The control unit may control the wireless communication apparatus to transmit information on the status data and the alarm about the risk of collision of the crane hook to the elliptical crane driver or the remote manager. For example, the tower crane driver can be informed of the risk of collision (direction and distance of collision danger) by making the tower crane driver's screen blink red. In addition, a warning sound or lightening device is installed in the cabin where the tower crane driver is working, and by operating them, the risk of crane hook collision can be announced. In the past, even if the risk of collision of the crane hook was detected, the tower crane driver or the remote manager could not confirm it, and this inconvenience can be solved.

4, a distance sensor 1, a controller 2, an alarm device 3, a battery 4, a solar cell 5, a light intensity sensor 6, and the like are attached to a crane hook Can be mounted.

The distance sensor 1 measures the distance between the crane object and the crane hook of the operator or the like. The distance measured by the distance sensor 1 is transmitted to the controller 2. The controller (2) controls the alarm device to generate an alarm when the measured distance is shorter than a preset distance. If the distance becomes shorter after that, the intensity of the alarm can be adjusted in proportion to the distance. If the crane hook stops and there is no movement, that is, if the distance between the crane hook and the object to be collided is no longer shortened, the alarm can be temporarily stopped.

The alarm device 3 may be a device for generating a warning sound and a light signal simultaneously or in combination.

In the solar cell 5, light is converted into electrical energy and stored in the battery 4, and the alarm device 3 or the like can be operated by utilizing the stored electrical energy.

The illuminance sensor 6 can sense the intensity of light. The controller 2 is classified into a daylight or a nightlight based on the intensity of the light measured by the ambient light sensor 6, and the light is illuminated around the daytime and the effect of the lightening is insignificant. On the other hand, since the surroundings are dark at night, the light can be controlled to generate light because it is more effective. In addition, the effect can be further enhanced by controlling the alarm sound to be generated at the same time.

The terms used in the present invention are intended to illustrate specific embodiments and are not intended to limit the invention. The singular presentation should be understood to include plural meanings, unless the context clearly indicates otherwise. The word " comprises " or " having " means that there is a feature, a number, a step, an operation, an element, or a combination thereof described in the specification.

The present invention is not limited to the above-described embodiments and the accompanying drawings, but is intended to be limited only by the appended claims. It will be apparent to those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. something to do.

1: Distance sensor 2: Controller
3: Alarm device (speaker, lighting) 4: Battery
5: Solar cell 6: Illumination sensor
7: Wireless modem 100: HOOK
101: Hoist Wire 102: Trolley
103: JIB 104: Cabin
105: Mast 106: Boom

Claims (5)

A collision object sensing unit for sensing the presence of the collision object and directly measuring the distance to the collision object;
An alarm device for generating an alarm; And
And a control unit for obtaining a measurement distance from the collision object sensing unit and controlling the alarm device,
Wherein the control unit generates an alarm by operating the alarm device when the measurement distance is shorter than the previously set distance and controls the intensity of the alarm according to the measurement distance, The operation of the alarm device is stopped.
The method according to claim 1,
Wherein the collision object sensing unit includes a distance sensor for measuring a distance to the collision object.
3. The method of claim 2,
Wherein the measuring range of the distance sensor is 10 m to 100 m.
3. The method of claim 2,
Wherein the distance sensor comprises an infrared distance sensor or a microwave distance sensor.
The method according to claim 1,
A radio communication apparatus for transmitting collision risk information obtained from the collision object sensing unit to a crane driver or a remote manager under the control of the control unit;
Further comprising a crane hook.

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