JP4914238B2 - Storage state detection device and storage state detection system - Google Patents

Description

  The present invention relates to a storage state detection device and a storage state detection system for detecting a storage state of a claim boom.

2. Description of the Related Art Conventionally, there has been known an apparatus for detecting a storage state of a crane mounted on a vehicle and preventing an accident in which a crane boom contacts a structure or a person. For example, the following Patent Document 1 discloses an alarm device that includes a buzzer and a switch connected in series to the buzzer and issues an alarm when the boom is not stored when the out trigger is stored. . The device described in Patent Document 2 below has an alarm device in which a boom detector, an out-trigger detector, and a travel detector are connected to a control unit, and is predetermined by receiving a signal from each detection means. An alarm is issued when used under other conditions. The device described in Patent Document 3 below has a proximity sensor fixed to the crane swivel and a circuit connected to the proximity sensor with a lead wire, and warns when the crane boom is not returned to a predetermined position. To emit.
JP 2001-139282 A JP 2004-59290 A JP-A-9-165193

  However, in the conventional apparatus described above, the wiring between the sensor for detecting the storage state of the crane boom to be detected and the alarm output circuit is a cable having a length and strength in consideration of mobility. It was necessary to be. As a result, once installed in the target vehicle or ship, it may be necessary to redo the wiring between the sensor and the circuit or replace the cable itself in order to divert it to other unequipped vehicles. It was.

  Moreover, since the structure and shape of the crane including the boom to be detected vary, it is necessary to attach a sensor corresponding to the structure to a specific position in order to reliably detect the position of the boom. In this case, the sensor may need to be replaced depending on the type of crane.

  Therefore, the present invention has been made in view of such a problem, and can be easily attached / detached corresponding to a detection target, and maintains the detection accuracy of the crane boom storage state without replacing parts. It is an object of the present invention to provide a storage state detection device and a storage state detection system that can be used.

  In order to solve the above-described problems, a storage state detection device according to the present invention includes a wireless communication unit for notifying a storage state of a crane boom by wireless communication, a housing incorporating a wireless communication unit, a housing, and a crane boom. It is fixed to the housing so that it can be switched on / off by contacting the crane boom when the crane boom is stored and a clamp for removably fixing to the fixed side of the hydraulic cylinder that drives The wireless communication unit detects an on / off state of the limit switch and transmits a signal corresponding to the on / off state.

  According to such a storage state detection device, the limit switch fixed to the casing is fixed by clamping the casing containing the wireless communication unit to the fixed side of the hydraulic cylinder for driving the crane boom. Corresponding to the structure and shape of the crane mechanism, it can be easily arranged so as to come into contact with the crane boom when the crane boom is stored. When the limit switch comes into contact with the crane boom, the limit switch is turned on / off, and a signal corresponding to the on / off state is transmitted by wireless communication. However, there is no need to redo the wiring between the limit switch and the alarm output device. Thereby, the storage state of the crane boom can be easily detected and notified without replacing parts such as cables and switches.

  The storage state detection system according to the present invention is based on the storage state detection device described above, a reception unit that receives a signal from the wireless communication unit, and an on / off state indicated by the signal received by the reception unit. And a receiving device having an output unit for outputting.

  According to such a storage state detection system, the storage state of the crane boom can be easily output without re-wiring the cable or the like even when mounted on another detection target.

  According to the present invention, it is possible to provide a storage state detection device that can be easily attached and detached in accordance with a detection target and that can maintain the detection accuracy of the storage state of the crane boom without replacing parts. Can do.

  Hereinafter, preferred embodiments of a storage state detection device and a storage state detection system according to the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a perspective view showing an external configuration when a storage state detection device 1 according to a preferred embodiment of the present invention is mounted on a crane 2, and FIG. 2 shows the storage state detection device 1 of FIG. 1 from the opposite side. FIG. 3 is a perspective view illustrating the state of the storage state detection device 1 of FIG. 1 when the crane boom is stored. The storage state detection device 1 is a device for notifying a monitoring person of a storage state of a crane boom of a crane mounted on a vehicle or a ship.

  The storage state detection device 1 includes a substantially rectangular parallelepiped casing 11 having a wireless communication function, a clamp 12 for detachably fixing the casing 11 to the crane 2, and a limit fixed to the outer surface of the casing 11. And a switch 13.

  The clamp 12 is a ring-shaped fastening member made of metal such as stainless steel or iron fixed to the outer surface of the housing 11 by screwing, fusion, or the like. Is provided. The clamp 12 has a shape that can be attached to and detached from the cylinder portion (fixed side) 5 of the hydraulic cylinder 4 for driving the crane boom 3 by raising and lowering the tip (free end) side of the crane boom 3. The clamp 12 is attached to the outer surface of the casing 11 so that the casing 11 can be fixed to the cylinder section 5 side along the driving direction V of the base end 3a of the crane boom 3 when the clamp 12 is mounted on the cylinder section 5. It has been.

  The limit switch 13 is fixed to the outer surface on the crane boom 3 side when the housing 11 is mounted on the crane 2 and includes a rod-like switch lever 15. The switch lever 15 has a structure in which the distal end side can be rotated with the base end side as a fulcrum when a predetermined pressure is applied to the distal end from the outside of the casing 11, and the switch lever 15 faces the outside of the casing 11. It is comprised so that it may have a repulsive force. The limit switch 13 detects the on state when the tip of the switch lever 15 moves a predetermined distance toward the housing 11 side. That is, when the crane boom 3 is housed by the sliding movement of the rod portion 16 of the hydraulic cylinder 4, the limit switch 13 is configured so that the base end 3 a of the crane boom 3 contacts the tip of the switch lever 15 and the switch lever 15 Detects being pushed into the housing side. Further, the limit switch 13 switches between on and off states according to the reciprocating motion of the switch lever 15.

  The housing 11 incorporates a wireless communication unit 17 for notifying the receiving device 20 installed in a driver's cab such as a vehicle or a ship by wireless communication. When the switch lever 15 is in an off state, that is, when the crane boom 3 is not stored, the wireless communication unit 17 transmits a signal indicating the unstored state to the receiving device 20 using wireless communication. Various methods are used as the wireless method used at this time, and specific low power wireless and simple wireless are preferably used from the viewpoint of downsizing the wireless module and reducing the influence on the outside. In addition, the wireless communication unit 17 may periodically transmit a signal, or may operate so as to transmit a signal when the switch lever 15 changes state.

  Next, with reference to FIG. 4, the connection relationship between the storage state detection device 1 and the reception device 20 will be described. The storage state detection device 1 and the reception device 20 constitute a storage state detection system 30 for notifying the monitoring person of the storage state of the crane boom 3.

  As shown in the figure, the reception device 20 includes a wireless reception unit 21 and an alarm output unit 22, and the wireless communication unit 17 of the storage state detection device 1 and the wireless reception unit 21 of the reception device 20 transmit signals by wireless communication. Can be sent and received. The wireless receiving unit 21 receives a signal indicating the unstored state of the crane boom 3 from the wireless communication unit 17 and sends an instruction for outputting an alarm to the alarm output unit 22 in accordance with the received signal. In response to this, the alarm output unit 22 causes an output unit such as a built-in or external lamp, display, or buzzer to output an alarm in response to an alarm output instruction received from the wireless reception unit 21. Here, as a method for outputting an alarm, various methods such as turning on a rotating lamp, displaying information on a display, sounding a buzzer or sound can be employed.

  In addition, this invention is not limited to embodiment mentioned above. For example, the wireless communication unit 17 detects the OFF state of the limit switch 13 and transmits a signal, but this may detect the ON state of the limit switch and transmit the signal, A signal may be transmitted in response to a transition between states. In such a case, according to the signal received by the wireless reception unit 21, the crane boom is not stored and is output to the alarm output unit 22.

It is a perspective view which shows the external appearance structure at the time of mounting | wearing with the crane of the accommodation state detection apparatus which is preferable one Embodiment of this invention. It is the perspective view which looked at the accommodation state detection device of Drawing 1 from the opposite side. It is a perspective view which shows the state at the time of crane boom accommodation of the accommodation state detection apparatus of FIG. It is a block diagram which shows schematic structure of a storage state detection system.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Storage state detection apparatus, 3 ... Crane boom, 4 ... Hydraulic cylinder, 4 ... Cylinder part (fixed side), 11 ... Housing | casing, 12 ... Clamp, 13 ... Limit switch, 17 ... Wireless communication part, 20 ... Receiver 30 ... Storage state detection system.

Claims (2)

A wireless communication unit for notifying the storage state of the crane boom by wireless communication;
A housing containing the wireless communication unit;
A clamp for removably fixing the housing to a fixed side of a hydraulic cylinder that drives the crane boom;
A limit switch fixed to the housing so that the on / off state can be switched by contacting the crane boom when the crane boom is stored;
With
The wireless communication unit detects an on / off state of the limit switch and transmits a signal corresponding to the on / off state;
A storage state detection device characterized by that. The storage state detection device according to claim 1;
A receiving unit that receives the signal from the wireless communication unit, and a receiving device that includes an output unit that outputs a storage state of the crane boom based on the on / off state indicated by the signal received by the receiving unit;
A storage state detection system comprising:

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