JP6121763B2 - Work vehicle - Google Patents

Description

  The present invention acquires work-specific information about peripheral members provided at the tip of the boom, such as an attachment attached to the tip of the boom and a hook suspended from the tip of the boom, and enables display of contents based on the information It is about.

  2. Description of the Related Art Conventionally, in a work vehicle having a boom, there is known a work vehicle in which a hook suspended at the tip of a boom can be replaced with a change in work speed or weight of a lifted load (Patent Document 1). Further, as other work vehicles, there are also known vehicles that can selectively mount an excavator (bucket) and a crane boom at the tip of the boom in order to selectively perform excavation work and crane work (patent) Reference 2).

Japanese Patent Laid-Open No. 2001-270685 Japanese Patent No. 2969336

  However, in the work vehicle described above, when a wide variety of peripheral members such as hook blocks, jibs, shovels, etc. are replaced at the tip of the boom, when checking the specifications of the newly installed peripheral members, an instruction manual is used. There were only a limited number of methods, such as checking, which was a cumbersome task.

  Therefore, the present invention has been made in view of the above-described circumstances, and facilitates acquisition of specific information of peripheral members such as hooks during work and immediately confirms the acquired specific information. An object of the present invention is to provide a work vehicle that can be used.

In order to solve the above-mentioned problem, in the invention according to claim 1, a vehicle body, a boom that can be raised and lowered by a hoisting cylinder, a swivel base that is pivotably attached to the vehicle body, The boom is detachably attached to the swivel, and the boom is provided with a transmitter that holds predetermined information about the boom and transmits the information. The vehicle body or the swivel is provided with a receiver for receiving the information transmitted from the transmitter .

The invention according to claim 2 is a work vehicle having a vehicle body, a boom that can be raised and lowered by a raising and lowering cylinder, and a swivel base that is pivotally attached to the vehicle body. The swivel base is detachably provided on the vehicle body, and the swivel base is provided with a transmitter that holds predetermined information about the swivel base and transmits the information. Is provided with a receiver for receiving the information transmitted from the transmitter .

  According to a third aspect of the present invention, the work vehicle according to the first or second aspect is provided with a display capable of acquiring the information received by the receiver and displaying the content of the information. It is characterized by that.

  The invention according to claim 4 is the work vehicle according to claims 1 to 3, wherein an RFID tag is the transmitter and an RFID reader is the receiver.

According to a fifth aspect of the present invention, in the work vehicle according to any one of the first to fourth aspects, a peripheral member for performing a predetermined work is detachably provided at an end of the boom. In addition, the information unique to the peripheral member is the information .

The invention according to claim 6 is the work vehicle according to claim 5, wherein the hook block is the peripheral member .

  According to the present invention, when confirming information on a peripheral member such as a hook during work, it is possible to easily acquire information unique to the peripheral member and to immediately confirm the acquired unique information. .

1 is a side view of a work vehicle according to a first embodiment of the present invention. It is a figure which shows arrangement | positioning of the RFID tag and RFID reader which concern on 1st Embodiment of this invention. It is a figure which shows simply the circuit arrangement | positioning of the overload prevention apparatus and RFID reader which concern on 1st Embodiment of this invention. It is a flowchart which shows the specific information acquisition process which acquires the information memorize | stored in the RFID tag by the RFID reader which concerns on 1st Embodiment of this invention.

  1 to 4 show a first embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. In addition, the same code | symbol is attached | subjected about the same or equivalent component, and the description is abbreviate | omitted when description overlaps.

  As shown in FIG. 1, the mobile crane 1 as a work vehicle according to the present invention includes a traveling vehicle body 10 and a crane device 20.

  The vehicle body 10 has wheels 11 and travels using an engine (not shown) as a power source. Outriggers 12 are provided on the left and right sides of the front and rear sides of the vehicle body 10 to prevent the vehicle body 10 from overturning during crane work and to stably support the vehicle body 10. The outrigger 12 can move outward in the width direction and can extend downward by a hydraulic jack cylinder 13. The outrigger 12 stably supports the vehicle body 10 with respect to the ground by grounding the lower end.

  The crane device 20 is suspended from a swivel base 21 that can be swung on a horizontal plane, a boom 22 that can be raised and lowered relative to the swivel base 21, and a telescopic boom 22, and a boom 22. A wire rope 26, a winch 24 for winding or unwinding the wire rope 26, and a driving cab 25 provided on the front side of the swivel base 21 for performing operations related to traveling of the vehicle body 10 and work by the crane device 20, It is equipped with.

  The swivel base 21 is provided so as to be turnable with respect to the vehicle body 10 via a ball bearing type or roller bearing type turn circle 21a, and is turned by a hydraulic turn motor (not shown).

  The boom 22 is configured as a telescope type composed of a plurality of boom members 22a, 22b, 22c and a boom member 22d on the foremost side. The base end portion of the most proximal end boom member 22 a is swingably connected to the bracket 21 c of the swivel base 21. A hydraulic hoisting cylinder 22e is connected between the boom member 22a and the bracket 21c, and the boom 22 is hoisted by an expansion and contraction operation of the hoisting cylinder 22e. A hydraulic telescopic cylinder (not shown) is provided inside the boom member 22a on the most proximal end side, and the boom 22 is expanded and contracted by expansion and contraction of the expansion cylinder.

  The hook block 23 a is provided on the distal end side of the wire rope 26 and is suspended from the distal end portion of the boom 22. A suspended load can be locked to the hook block 23 a, and the suspended load locked to the hook block 23 a is suspended from the tip of the boom 22.

  The winch 24 has a drum 24a around which a wire rope 26 is wound, and the drum 24a is configured to be rotatable forward and backward by a hydraulic winch motor (not shown).

  The driving cab 25 is provided on the side of the bracket 21 c on the turntable 21 and turns together with the turntable 21.

  As shown in FIG. 2, an RFID tag 30 on which information relating to an ID number and the like is written is attached to a hook block 23a that is a suspended object suspended from the tip of the boom and is a peripheral member of the mobile crane 1. Yes. The RFID tag 30 is attached to the upper surface of the hook block 23a or is embedded by being embedded in the hook block 23a.

  The RFID tag 30 is written with information related to the hook block 23a and specific information regarding the hook. The unique information includes the hook block's own ID number, model, serial number, weight, maximum load load, number of wires that the hook can handle, number of sheaves, error detection code such as CRC check (cyclic redundancy check), etc. These are individual specification information set at the shipping stage and written in a tag-side memory (described later) built in the RFID tag 30.

  As shown in FIG. 2, an RFID reader 40 having a wireless range of 3 to 5 m is attached to the boom member 22d. When the RFID tag 30 enters the wireless range, the RFID reader 40 can acquire specific information regarding the hook block written in the RFID tag 30. That is, actually, the occupant performs the winding operation of the wire rope 26 so that the hook block 23 a is inside the wireless range of the RFID reader 40.

  The RFID tag 30 includes a coiled tag-side antenna that generates electromotive force by electromagnetic waves transmitted from the RFID reader 40, an IC chip that has a tag-side memory and a tag-side control unit, and is activated by the generated electromotive force. And a package (label) for holding the IC chip and the antenna on the tag side.

  The RFID reader 40 includes a coil-shaped reader-side antenna that transmits electromagnetic waves and radio waves to the tag-side antenna of the RFID tag 30 and receives signals from the RFID tag 30, and a reader-side control unit.

  The RFID tag 30 receives a command signal included in an electromagnetic wave or the like sent from the RFID reader 40 by a tag side control unit included in the activated IC chip, and an ID to be transmitted based on the received command signal Information such as a number is wirelessly transmitted to the RFID reader 40. The RFID reader 40 receives information such as an ID number wirelessly transmitted from the RFID tag 30.

  In the driving cab 25 shown in FIG. 1, an overload prevention device 50 for displaying the operating state of the crane to the occupant is attached for ensuring safety during work. And as shown in FIG. 3 which is a block diagram, the overload prevention device 50 includes an operation unit 51 that can be operated by an occupant, a display unit 52 that can display operation-related information during operation of the crane device 20, And a controller 53 that performs various controls.

  The overload prevention device 50 includes a storage unit 54 that stores various types of information related to the operation state of the crane. As illustrated in FIG. 3, information such as an ID number wirelessly transmitted from the RFID tag 30 is stored in the RFID reader 40. The information transmitted from the RFID reader 40 can be stored and the stored information such as the ID number can be displayed on the display unit 52.

  Specifically, the display unit 52 is provided in the driving cab 25 and is composed of a liquid crystal display disposed at a position that is most easily seen by an occupant during work. In addition, on the display screen of the display unit 52, it is possible to display information related to peripheral members such as the operating status of the crane device 20 and information related to the hook block 23a.

  The operation unit 51 is provided on or around the screen of the display unit 52. In addition to inputting various information related to the operating state of the crane and switching the display screen, the operation unit 51 is an information acquisition command written to the RFID tag 30 for the RFID reader 40. An operation and a call operation (display operation) of information related to the hook block 23a stored in the overload prevention device 50 can be performed.

  The overload prevention device 50 is connected so as to be able to receive detection signals in order to obtain detection signals from various detection means (sensors) provided in the vehicle body 10 and the crane device 20. For example, as shown in FIG. 3, operation detection means 70 described later capable of detecting the operation state of the winch 24 or the wire rope 26 and a suspended weight detection means 60 for detecting the weight Wa applied to the wire rope 26 are connected. .

  The controller 53 of the overload prevention device 50 has various operation mechanisms so that the operation of the vehicle body 10 and the crane device 20 can be automatically stopped by the controller 53 regardless of the operation by the occupant in an emergency or the like. Are connected in a controllable manner. In this case, for example, a winch 24 for winding or feeding the wire rope 26 is connected.

  As shown in FIG. 2, during the operation in which the wire rope 26 extends downward, the controller 53 obtains unique information written in the RFID tag 30 by the RFID reader 40 when acquiring information related to the hook block 23a. Perform the acquisition process of specific information. The unique information acquisition process will be described with reference to the flowchart shown in FIG.

(Step S1)
In step S1, the controller 53 performs a confirmation process for the presence or absence of an operation for acquiring information related to the hook block 23a by the occupant. When the controller 53 confirms the operation signal obtained by operating the operation unit 51, the controller 53 proceeds to step S2.
If the operation signal cannot be confirmed, it is determined that the operation by the passenger has not been performed, and step S1 is repeated.

(Step S2)
In step S2, the controller 53 transmits a drive signal to the RFID reader 40 provided on the boom member 22d and can receive a signal wirelessly in order to acquire unique information written in the RFID tag 30. And proceed to step S3.

(Step S3)
In step S <b> 3, the controller 53 performs a confirmation process as to whether or not the RFID reader 40 has received the unique information transmitted from the RFID tag 30. If the controller 53 determines that the unique information regarding the hook block 23a has been received, the controller 53 proceeds to step S4. If it is determined that the signal could not be received, the process returns to step S1.

(Step S4)
In step S <b> 4, the controller 53 performs content confirmation processing of specific information regarding the hook block 23 a acquired via the RFID reader 40. For example, a cyclic redundancy check (CRC check) is performed to check whether an error such as data corruption has occurred. If an error is found through data inspection, the controller 53 proceeds to step S5.
If no error is found, the controller 53 determines that the unique information has been successfully acquired, and proceeds to step S6.

(Step S5)
In step S5, the controller 53 displays a warning such as “information acquisition error” via the display unit 52, notifies the acquired information that an error has occurred, and returns to step S1.

(Step S6)
In step S6, the controller 53 displays the acquired unique information via the display unit 52, and proceeds to step S7.

(Step S7)
In step S7, the controller 53 stores the unique information in the storage unit 54, and finishes the unique information acquisition process.

  By the above control, the occupant can immediately confirm the unique information. Thereafter, when it is desired to confirm the specification information of the hook block 23a such as the serial number and weight, the unique information stored in the storage unit 54 is displayed. It can be displayed again on the part 52 and confirmed.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to the above-described embodiment, and design changes and the like within a scope not departing from the gist of the present invention are possible. Even if it exists, it is included in this invention.

  As another embodiment, the controller 53 can calculate the current weight of the load from the suspended weight that can be detected as the weight applied to the wire rope 26 and the weight of the hook block 23a included in the unique information. .

  Then, the controller 53 performs a comparison process to determine whether or not the calculated current weight of the load exceeds the maximum load load value of the hook block 23a included in the unique information, and exceeds the maximum load load value. If so, the passenger can be informed accordingly.

  Further, when the current wire multiplier is input to the operation unit 51 of the overload prevention device 50 by the occupant, the controller 53 relates to the hook block 23a in which the input current wire multiplier is included in the unique information. It is possible to check whether or not the number of wires is a number that can be handled.

  If the controller 53 determines that the current wire multiplier is not a multiplier that can handle the wire multiplier related to the hook block 23a included in the unique information, the controller 53 can notify the passenger to that effect. .

  Further, when sub-hooks are used in addition to the hook block 23a, the winch that moves the hook block 23a up and down is the main winch and the winch that moves the sub-hook up and down when acquiring unique information on each hook. The information that is a sub-winch can also be acquired at the same time.

In this case, for example, when the weight of the load suspended from the hook block 23a exceeds the maximum load load value of the hook block 23a, the operation of the main winch can be stopped.
In addition, when the weight of the load suspended by the sub hook exceeds the maximum load load value of the sub hook, the operation of the sub winch can be stopped. Then, the passenger can be notified through the display unit 52 that the weight of the luggage exceeds the allowable value of the hook block 23a or the sub hook.

  In addition, when a plurality of hook blocks are connected to the tip of the boom 22, the controller 53 can acquire specific information regarding the plurality of hook blocks by the same RFID reader 40.

And based on the information about all the maximum load loads of a plurality of connected hook blocks, it is possible to calculate the overall maximum load load when all the plurality of hook blocks are used at the same time and store them. It can be stored in the unit 54.

  As other embodiments, on the display screen of the display unit 52 of the overload prevention device 50 on the basis of the number of wire hooks of the wire rope 26 that can be handled by the acquired and stored hook block 23a, A schematic diagram or an image can be displayed to assist the occupant's work. Further, not only passengers in the driving cab 25 but also workers outside the mobile crane 1 can assist the work by transmitting a schematic diagram and an image on how to hang the wire rope 26 to the mobile terminal. You can also

  In the above-described embodiment, the RFID reader 40 is attached to the tip of the boom member 22d in order to acquire unique information written in the memory of the RFID tag 30 by wireless communication. However, the information written in the RFID tag 30 may be read when the mobile crane 1 is stored, not during the work. In this case, the RFID reader 40 may be read from the surface or upper portion of the outrigger 12 shown in FIG. May be arranged.

  In this case, in the state where the mobile crane 1 is stored, the hoisting cylinder 22e is not expanded and contracted. For example, as shown in FIG. 1, the boom 22 is in a substantially horizontal state. Information from the RFID tag 30 attached to the hook block 23a can be acquired by the RFID reader 40 that is disposed on the outrigger 12 and has a relatively wide wireless range.

  In the embodiment described above, the RFID tag 30 stores unique information regarding the hook block 23a, but the information stored in the RFID tag 30 may be only the ID information of the peripheral members. Then, when the overload prevention device 50 acquires the ID information via the RFID reader 40, the ID information is searched as a search key with respect to a database (not shown) possessed by the mobile crane 1 separately. And it is good also as a structure which acquires the specific information of the hook block 23a memorize | stored in the database.

  In this case, the contents stored in advance in the memory of the RFID tag 30 can be simplified, and when the information related to the hook block 23a is updated or new contents are added, the RFID tag 30 already attached to the hook block 23a is removed. There is no need to collect it, and it is only necessary to rewrite the contents of the database provided in one place, so that convenience can be improved.

  In the above-described embodiment, the hook block 23a of the mobile crane 1 has been described as the peripheral member. However, the present invention is not limited to this. In other words, it is possible to acquire specific information when attaching or hanging each peripheral member without questioning the type of peripheral member provided at the tip of the boom, such as a jib, shovel, or excavating member. It is applicable to the peripheral members.

  As another embodiment, when the boom 22 can be attached to and detached from the swivel base 21, the RFID reader 40 is attached to the swivel base 21 or the vehicle body 10, and the RFID in which unique information about the boom 22 is written. It is also possible to attach the tag 30 to the boom 22. In this case, the occupant can easily acquire the unique information regarding the boom 22 and can immediately confirm the information regarding the boom 22.

  Further, even when the swivel base 21 can be attached to and detached from the car body 10, the RFID reader 40 is attached to the car body 10, and the RFID tag 30 in which unique information regarding the carousel 21 is written is attached to the carousel 21. It is also possible to keep it. In this case, the occupant can easily acquire the unique information regarding the swivel base 21 and can immediately confirm the information regarding the swivel base 21.

  The communication distance between the RFID tag 30 and the RFID reader 40 is not only a proximity type in which the maximum communicable distance is about 10 cm, but also a contact type in which the communication distance is from contact to several millimeters, and the communication distance is about 70 cm at maximum. It may be a proximity type with a maximum distance of up to several meters, or a remote type with a maximum distance of several meters, and can be applied according to the type of peripheral member used in the work vehicle.

DESCRIPTION OF SYMBOLS 1 Mobile crane 10 Car body 11 Wheel 12 Outrigger 13 Jack cylinder 20 Crane apparatus 21 Swivel base 22 Boom 23a Hook block 24 Winch 25 Driving cab 26 Wire rope 30 RFID tag 40 RFID reader

Claims (6)

A work vehicle having a vehicle body, a boom that can be raised and lowered by a raising and lowering cylinder, and a swivel base that is pivotally attached to the vehicle body;
The boom is detachably attached to the swivel,
The boom is provided with a transmitter that holds predetermined information about the boom and transmits the information.
A work vehicle, wherein the vehicle body or the turntable is provided with a receiver that receives the information transmitted from the transmitter . A work vehicle having a vehicle body, a boom that can be raised and lowered by a raising and lowering cylinder, and a swivel base that is pivotally attached to the vehicle body;
The swivel base is detachably provided on the vehicle body,
The swivel base is provided with a transmitter that holds predetermined information about the swivel base and transmits the information,
A work vehicle, wherein the vehicle body is provided with a receiver for receiving the information transmitted from the transmitter . Working vehicle according to claim 1 or 2, characterized in that it comprises a display capable of displaying the contents of the information to acquire the information received by the receiver. With RFID tags is the transmitter, the work vehicle according to any one of claims 1 to 3, wherein the RFID reader is the receiver. A peripheral member for performing a predetermined operation is detachably provided at the end of the boom.
  The work vehicle according to claim 1, wherein the information unique to the peripheral member is the information. The work vehicle according to claim 5, wherein a hook block is the peripheral member.

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