JP2008114936A - Mobile crane having hanger with electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile crane having a hanger with an electronic apparatus which is equipped with the electronic apparatus on the hanger of the mobile crane and capable of preventing a battery from being detached for change or charging when the capacity of the battery to operate the electronic apparatus is reduced. <P>SOLUTION: The mobile crane having the hanger storage function 4 of bringing a hanger 3 close to and storing it in a fore end side of a stored expansion boom 1 by winding a wire rope 2 into a winch comprises a boom side connection terminal 12 which is arranged on the fore end side of the stored expansion boom 1 and a hanger side connection terminal 11 which is arranged on the hanger 3 and connected to a charging battery 10a. The connection terminals 11, 12 are opposite to and engaged with each other in a connected state when the hanger is stored by the hanger storage mechanism 4, and the connected state is released when the hanger is not stored. The charging battery 10a is charged by a power supply 18 on the vehicle side when the hanger is stored. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a mobile crane having a suspension with an electronic device.

  As shown in FIG. 7, this type of mobile crane has a telescopic boom 1 disposed on a vehicle so as to be raised and lowered. The telescopic boom 1 includes a base boom 20, an intermediate boom 21 and a tip boom 22 that are sequentially inserted into the base boom 20 so as to be telescopic, and appropriate telescopic drive means are disposed between the booms. A winch (not shown) is disposed on the proximal end side of the telescopic boom 1, the wire rope 2 is fed out from the winch to pass the distal end portion of the telescopic boom 1, and the wire rope 2 lifts the hoisting tool from the distal end portion of the telescopic boom 1. 3 is suspended. A lifting device storing function 4 for storing the lifting device 3 close to the distal end side of the telescopic boom 1 stored by winding the wire rope 2 around the winch is provided.

Specifically, the sheave 1a is rotatably supported between the side plates 1c and 1c at the tip of the tip boom 22 of the telescopic boom 1 and is pivoted by a support shaft that is supported between the side plates 3c of the suspension 3. A free hook 3d is provided, and a rotatable sheave 3a is pivotally supported 3b between both side plates 3c. When the wire rope 2 is hung between the sheave 1a and the sheave 3a and the wire 3 is wound around the winch, the retractable boom 1 is brought close to the distal end side of the telescopic boom 1 which is retracted and stored. A lifting device storing function 4 for storing and holding the lifting device 3 along the lower surface of the distal end of the telescopic boom 1 is provided between the distal end portion and the side plates 3c, 3c of the lifting device 3. The hoisting tool 3 stored along the lower surface of the distal end of the telescopic boom 1 is abutted by a fixing part 5 attached to the hoisting tool 3 and a cushion rubber 7 attached to the front end part of the telescopic boom 1 via a locking tool 6. It is locked. (For example, see Patent Document 1)
Moreover, the hanging tool storing function 4 of the above-described embodiment is configured to store the hanging tool 3 close to the lower end of the telescopic boom 1 stored by winding the wire rope 2 around the winch. However, as shown in FIG. 8, there is also known a lifting device storing function 35 in which the upper portion of the lifting device 3 is brought into contact with the lower end of the telescopic boom 1 so as to be stored. In the hanging device storage function 35 of this embodiment, the lower surface of the distal end of the telescopic boom 1 and the upper surface of the hanging device 3 are provided with contact surfaces so as to contact each other. (For example, see Patent Document 2)
By the way, when moving a thing to be lifted with such a mobile crane, an alarm device is attached to the hanging tool 3 so as to call attention to the surroundings. And since it is difficult to supply from the vehicle side power supply as a power supply of the alarm device, it is performed by a battery. And when the capacity of the battery decreases, the battery must be removed in order to replace or charge the battery. In order to eliminate this troublesome work, power generation is generated by rotating the sheave 3a of the suspension 3. It is known that a means is arranged and a battery is charged by this power generation means. (For example, see Patent Document 3)
Utility Model Registration No. 2537761 (first page, FIG. 1) Japanese Utility Model Publication No. 61-203693 (Page 3, FIG. 6) Japanese Patent No. 3101211 (page 4, page 7, FIGS. 1 to 4)

However, in Patent Document 3, the rotation of the sheave 3a must be taken out from the suspension 3 and power must be generated by the extracted rotation, which requires a mechanical structure. The structure of the suspension 3 is complicated and the overall size is large. There is a problem of becoming larger. Moreover, since charging of the battery depends on the rotation of the sheave 3a of the hanging tool 3, it is impossible to charge the work without the vertical movement of the hanging tool 3 (rotation of the sheave 3a), and the battery can be reliably charged. Not.

  An object of this invention is to provide the mobile crane which has a hanging tool with an electronic device which solved such a subject.

  In order to achieve the above object, a mobile crane having a suspension with an electronic device according to claim 1 according to the present invention is arranged on a vehicle so as to be able to undulate, and arranged on the base end side of the telescopic boom. A telescopic boom that has a winch, a wire rope that extends from the winch through the distal end of the telescopic boom, and a hanging tool that is suspended from the distal end of the telescopic boom by the wire rope, and is stored by winding the wire rope around the winch A suspension device with an electronic device provided with a suspension battery storing function for storing the suspension device close to the distal end of the electronic device, and having a charging battery and operating with a power source from the charging battery. A mobile crane having a boom-side connection terminal connected to a power source of a vehicle disposed on a distal end side of a retractable telescopic boom; and a rechargeable battery connected to the charging battery. The connection terminals are arranged such that each connection terminal is opposed to and engaged with the suspension storage mechanism by the suspension storage mechanism to be in a connected state, and the connection state is released when the suspension is not stored. The charging battery is charged with a power source on the vehicle side when the hanging tool is stored.

  According to a second aspect of the present invention, there is provided a mobile crane having a suspension with an electronic device according to the present invention, an extendable boom disposed on a vehicle, a winch disposed on a base end side of the extendable boom, and an extendable boom extended from the winch. A wire rope that has passed through the tip of the telescopic boom, and a suspension that is suspended from the tip of the telescopic boom by the wire rope, and the hoist is attached to the distal end of the telescopic boom stored by winding the wire rope around the winch. In a mobile crane having a hanging device storing function for storing in close proximity and having a charging battery and an electronic device that is operated by a power source from the charging battery, the hanging crane with an electronic device is provided in the hanging device. An inverter that converts a power source into a high frequency of a predetermined frequency, a primary coil that is disposed on the distal end side of a telescopic boom that is supplied with and stores the high frequency from the inverter, and a suspension A secondary coil for inducing a high frequency supplied to the primary coil and a rectifying circuit for rectifying the high frequency induced in the secondary coil and connecting to the rechargeable battery, the primary coil and the The secondary coil is disposed in a close position facing the suspension device when the suspension device is stored by the suspension device storage mechanism, and is placed in a separated position when the suspension device is not stored. When the suspension device is stored, the rechargeable battery is charged by a power source on the vehicle side. It is characterized by the fact that it has been allowed to.

  According to the first aspect of the present invention, in the mobile crane having the electronic device suspension, when the suspension is stored by the suspension storage mechanism, the boom side connection terminal and the suspension side connection terminal are opposed to each other. Then, the connected battery is brought into a connected state, and the charging battery can be charged by the power source on the vehicle side. Therefore, when the mobile crane is not in use, it is possible to charge the rechargeable battery of the electronic device by storing the suspension with the suspension retracting function. There is no need to perform the troublesome work of removing the battery to charge it. Further, there is no need to arrange a mechanical structure in which the rotation of the sheave 3a is taken out of the suspension 3 and the power is generated by the extracted rotation, and in this case, the structure of the suspension 3 is simplified and the overall size is reduced. Can do.

  According to a second aspect of the present invention, there is provided a mobile crane having the electronic device suspension according to the present invention, wherein the primary coil and the secondary coil face each other when the suspension is stored by the suspension storage mechanism. The high frequency from the inverter located and supplied to the primary coil is induced in the secondary coil, and the high frequency induced in the rectifier circuit is rectified to charge the charging battery of the electronic device. Therefore, it is not necessary to perform the troublesome work of removing the battery in order to replace the battery or charge the charged battery when the capacity of the battery decreases. Further, there is no need to arrange a mechanical structure in which the rotation of the sheave 3a is taken out of the suspension 3 and the power is generated by the extracted rotation, and in this case, the structure of the suspension 3 is simplified and the overall size is reduced. Can do. In addition, since the rechargeable battery can be charged by being contacted, a waterproof structure can be easily achieved, corrosion can be prevented, and poor contact can be prevented.

  Hereinafter, an embodiment of a mobile crane having a suspension with an electronic device according to the present invention will be described with reference to FIGS. In describing a mobile crane having a suspension with an electronic device according to the present invention, reference numerals 1 to 7, reference numerals 1a, 1b, 1c, reference numerals 3a, 3b, 3c, reference numerals 20 to 22, and reference numerals in the following description. 35 is the same as that illustrated and described in FIG. 7 and FIG. 8, and therefore the detailed description thereof is omitted in the following description.

  First, a first embodiment is shown in FIGS. 1 and 2 and will be described below. An electronic device 10 is attached to the side plate 3 c of the hanging tool 3, and a charging battery 10 a is built in the electronic device 10. Each electrode of the rechargeable battery 10a is connected to supply power as a power source for operating the electronic device in the electronic device 10. In addition, the plus electrode of the rechargeable battery 10a has a hanging-side connection terminal 11 disposed on the outer surface of the case of the electronic device 10 and is connected to this terminal. The negative electrode of the rechargeable battery 10a is connected to the side plate 3c.

  The electronic device 10 detects a load acting on the hook 3d and wirelessly transmits the detected load value to a safety device provided on the vehicle side, or an operator positioned around the suspension 3 It is arranged as a device such as an alarm device that calls attention to approaching.

  When the hanging device 3 is stored along the lower surface of the distal end of the telescopic boom 1 by the hanging device storing function 4, the hanging device side disposed on the outer surface of the case of the electronic device 10 attached to the side plate 3c of the stored hanging device 3. A boom-side connection terminal 12 is arranged at the lower surface position of the distal end portion of the telescopic boom 1 facing the connection terminal 11. That is, as shown in FIG. 2, the boom side connection terminal 12 includes a case 13, a connection terminal 12 a that is slidably inserted into the case 13, and the connection terminal 12 a is urged downward in the case 13. It is comprised with the spring 14 to be made. The case 13 is attached to the base boom 20 via insulating materials 15 and 16. The connection terminal 12a is connected to the plus electrode of the vehicle-side power supply 18 via the cable 17.

  Accordingly, the connection terminals 11 and 12a are engaged with each other when the suspension member 3 is stored by the suspension storage mechanism 4 and are connected to each other, and the connection terminals 11 and 12a are urged by the spring 14 to be connected. Can be stably maintained. Since the negative electrode of the power source 18 on the vehicle side is connected to the vehicle body, the charging battery 10a can be charged by the power source 18 on the vehicle side. When the hanger 3 is in the non-retracted state, the connection terminals 11 and 12a are released from the connected state, so that the charging is stopped, and the electronic device 10 operates with the built-in charging battery 10a.

  As described above, in the mobile crane having the electronic device suspension according to the first embodiment of the present invention, when the mobile crane is not used, the electronic device 10 can be obtained by storing the suspension 3 with the suspension storage function 4. The charging battery 10a can be charged, and when the capacity of the charging battery 10a decreases, it is not necessary to perform the troublesome work of replacing the charging battery 10a or removing the charging battery 10a in order to charge the charging battery 10a. Further, there is no need to arrange a mechanical structure as in the method of taking out the rotation of the sheave 3a from the suspension 3 and generating electric power by the extracted rotation to secure the power source of the electronic device 10, and the suspension 3 is compared with this case. The structure is simplified and the overall size can be reduced.

  Next, in the above-described embodiment, the hanging tool 3 is stored close to the lower end of the telescopic boom 1 which is retracted by winding the wire rope 2 around the winch by the hanging tool storing function 4. However, as shown in FIG. 4, the present invention can also be applied to the case where the upper part of the hanging tool 3 is brought into contact with the lower end of the telescopic boom 1 by the hanging tool storing function 35 so as to be stored. This case is illustrated in FIGS. 3 and 4 as a second embodiment and will be described below. The hanging device storage function 35 of this embodiment includes contact surfaces 35a and 35b on the lower surface of the distal end of the telescopic boom 1 and the upper surface of the hanging device 3 so as to contact each other.

  The electronic device 10 is attached to the upper part of the side plate 3 c of the hanging tool 3, and the wedge-shaped hanging tool side connection terminal 31 is disposed on the upper surface of the attached electronic device 10. The hanging electrode side connection terminal 31 is connected to a plus electrode of a rechargeable battery 10 a built in the electronic device 10. The negative electrode of the rechargeable battery 10 a is connected to the side plate 3 c of the hanging tool 3.

  As shown in FIGS. 3 and 4, the wire rope 2 is wound on the winch on the front boom 22 side plate 1 c of the telescopic boom 1, so that the lifting tool storage function 35 causes the contact surface 35 a at the lower end of the front boom 22. When the abutting surface 35b of the hanging tool 3 is brought into contact with the hanger 3, the boom-side connecting terminal 32 is disposed so as to contact the hanger-side connecting terminal 31. The boom side connection terminal 32 includes a pair of arms 33a and 33b made of an insulating material with pivotal shafts 34a and 34b provided on the front boom 22 side plate 1c as fulcrums and swinging in the front and rear directions. A connection terminal 32a, 32b attached to the tip of each arm 33a, 33b and a spring 34 arranged between the pair of arms 33a, 33b are arranged. The connection terminal 32a is connected to the positive electrode of the vehicle-side power supply 18 via the cable 17 and the cord winder 19 (arranged to change the length of the cable 17 corresponding to the expansion and contraction of the telescopic boom 1). . The connection terminals 32a and 32b are urged by a spring 34 to contact and close the connection terminals 32a and 32b. To open.

  The second embodiment configured as described above operates as follows. From the state shown in FIG. 3, the wire rope 2 is wound by the winch, and the contact surface 35 b of the suspension tool 3 is brought into contact with the contact surface 35 a at the lower end of the tip boom 22 by the lifting device storage function 35. Then, as shown in FIG. 4, the suspension-side connection terminal 31 is fitted between the connection terminals 32 a and 32 b of the boom-side connection terminal 32 against the urging force of the spring 34, and Connection terminals 32a and 32b of connection terminal 31 and boom side connection terminal 32 are maintained in a connected state. Therefore, the plus electrode of the power source 18 on the vehicle side is connected to the plus electrode of the charging battery 10a built in the electronic device 10 via the cable 17, and the minus electrode of the power source 18 on the vehicle side is the wire rope 2 or the contact surface 35a, The battery is charged by being connected to the negative electrode of the rechargeable battery 10a built in the electronic device 10 via 35b.

  When the wire rope 2 is unwound by the winch in the state of FIG. 4, the suspension side connection terminal 31 fitted between the connection terminals 32 a and 32 b of the boom side connection terminal 32 is pulled out to be in the state of FIG. 3. Therefore, the connection state of the connection terminals 32a and 32b of the hanger side connection terminal 31 and the boom side connection terminal 32 is released to stop charging, and the electronic device 10 is operated by the built-in charging battery 10a.

  Thus, also in the mobile crane which has a hanging tool with an electronic device according to the present invention in the second embodiment, the same effect as in the case of the first embodiment can be obtained.

  In addition, it is good to use the metal of antirust materials, such as stainless steel, for the boom side connection terminal 12 and the hanger side connection terminal 11 of the said 1st Embodiment. Similarly, it is advisable to use a rust-proof metal such as stainless steel for the hanger side connection terminal 31 and the connection terminals 32a and 32b of the second embodiment.

  In each of the above embodiments, the power source on the vehicle side is directly connected to the charging battery 10a built in the electronic device 10 for charging. Good. An embodiment in this case is shown in FIGS. 5 to 6 as a third embodiment and will be described below.

  In the third embodiment, as in the case of the first embodiment, the electronic device 10 is attached to the side plate 3c of the hanging tool 3, and the rechargeable battery 10a is built in the electronic device 10. Each electrode of the charging battery is connected to supply power as a power source for operating the electronic device in the electronic device 10.

  As shown in FIG. 6, the positive electrode and the negative electrode of the rechargeable battery 10 a are connected via a rectifier circuit 42 to a secondary coil element 41 disposed on the outer surface of the case of the electronic device 10 and surrounded by an insulating material. Yes. The electronic device 10 detects a load acting on the hook 3d and wirelessly transmits the detected load value to a safety device provided on the vehicle side, or an operator positioned around the suspension 3 It is arranged as a device such as an alarm device that calls attention to approaching.

  A primary coil surrounded by an insulating material at the lower surface position of the distal end portion of the telescopic boom 1 facing the secondary coil 41 when the suspension device 3 is stored along the lower surface of the distal end of the telescopic boom 1 by the lifting device storing function 4. 43 is arranged. The primary coil 43 is supplied with a high frequency via an inverter 44 that converts the power source 18 (direct current) of the vehicle into a high frequency (alternating current) of a predetermined frequency. The inverter 44 is connected to the power source 18 plus electrode of the vehicle via the cable 17 with a charging switch 45 inserted in the middle, and the minus electrode of the vehicle power source 18 is connected to the inverter 44 via a vehicle or a telescopic boom.

  The primary coil 43 and the secondary coil element 41 are surrounded by an insulating material, but are sealed and waterproof. Moreover, although the high frequency (alternating current) is converted into direct current from the secondary coil element 41 to the charging battery 10a via the rectifying circuit 42, a smoothing circuit is arranged after the rectifying circuit 42 to charge the charging battery 10a. May be.

  The third embodiment configured as described above operates as follows. The wire rope 2 is wound up by a winch, the hanging device 3 is stored along the lower surface of the distal end of the telescopic boom 1 by the hanging device storing function 4, and the charging switch 45 is turned on. Then, the primary coil 41 and the secondary coil 43 are located in close proximity to each other, and the high frequency from the inverter 44 supplied to the primary coil 43 is induced in the secondary coil 41 and induced in the rectifier circuit 42. The high frequency is rectified and the charging battery 10a of the electronic device 10 can be charged. Further, when the wire rope 2 is fed out by a winch in the state of FIG. 5, the primary coil 41 and the secondary coil 43 are separated from the adjacent positions facing each other, and from the inverter 44 supplied to the primary coil 43. The high frequency is no longer induced in the secondary coil 41 and charging is stopped, and the electronic device 10 is operated by the built-in charging battery 10a.

  As described above, when the capacity of the charging battery 10a is reduced, the troublesome work of removing the charging battery 10a in order to replace the charging battery 10a or charge the charging battery 10a is not necessary. Further, there is no need to arrange a mechanical structure in which the rotation of the sheave 3a is taken out of the suspension 3 and the power is generated by the extracted rotation, and in this case, the structure of the suspension 3 is simplified and the overall size is reduced. Can do. In addition, since the rechargeable battery can be charged by being contacted, a waterproof structure can be easily achieved, corrosion can be prevented, and poor contact can be prevented.

It is explanatory drawing explaining 1st Embodiment of the mobile crane which has a hanging tool with an electronic device which concerns on this invention. It is explanatory drawing explaining 1st Embodiment of the mobile crane which has a hanging tool with an electronic device which concerns on this invention, and is an expanded sectional view of the principal part. It is explanatory drawing explaining 2nd Embodiment of the mobile crane which has a hanging tool with an electronic device which concerns on this invention, and is explanatory drawing when a hanging tool is made into the non-retracted state. is there. It is explanatory drawing explaining 2nd Embodiment of the mobile crane which has a hanging tool with an electronic device which concerns on this invention, and is explanatory drawing when the hanging tool is made into the storing state by the hanging tool storing mechanism. It is explanatory drawing explaining 3rd Embodiment of the mobile crane which has a hanging tool with an electronic device which concerns on this invention, and is explanatory drawing when the hanging tool is made into the storing state by the hanging tool storing mechanism. It is explanatory drawing explaining the circuit diagram of 3rd Embodiment of the mobile crane which has a hanging tool with an electronic device which concerns on this invention. It is explanatory drawing when a hanging tool is made into the storing state with the hanging tool storing mechanism in a mobile crane. It is explanatory drawing when the hanging tool is made into the storing state by the other hanging tool storing mechanism in the mobile crane.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Telescopic boom 2 Wire rope 3 Hanging tool 4 Hanging tool storing mechanism 10 Electronic device 10b Charging battery 11 Hanging tool side connection terminal 12 Boom side connection terminal 18 Power source 31 on the vehicle side Hanging tool side connection terminal 32 Boom side connection terminal 35 Hanging tool Storage mechanism 41 Primary coil 42 Rectifier circuit 43 Secondary coil 44 Inverter

Claims (2)

A telescopic boom that can be raised and lowered on a vehicle, a winch that is disposed on the base end side of the telescopic boom, a wire rope that extends from the winch and passes through the distal end of the telescopic boom, and is suspended from the distal end of the telescopic boom by the wire rope. And a retractor storage function for storing the suspension tool close to the distal end side of the telescopic boom stored by winding the wire rope around the winch, and having a charging battery. In a mobile crane having a suspension with an electronic device provided with an electronic device that operates with a power source from
A boom-side connection terminal disposed on the distal end side of the retractable telescopic boom and connected to the power source of the vehicle, and a suspension-side connection terminal disposed on the suspension and connected to the charging battery are arranged, and each connection terminal is connected to the suspension It is arranged to engage and engage with each other when the hanging device is stored in the device storing mechanism so that the connected state is released when the hanging device is not stored, and the charging battery is charged with the power source on the vehicle side when the hanging device is stored. A mobile crane having a suspension with an electronic device. A telescopic boom that can be raised and lowered on a vehicle, a winch that is disposed on the base end side of the telescopic boom, a wire rope that extends from the winch and passes through the distal end of the telescopic boom, and is suspended from the distal end of the telescopic boom by the wire rope. And a retractor storage function for storing the suspension tool close to the distal end side of the telescopic boom stored by winding the wire rope around the winch, and having a charging battery. In a mobile crane having a suspension with an electronic device provided with an electronic device that operates with a power source from
An inverter that converts the power source of the vehicle into a high frequency of a predetermined frequency, a primary coil that is disposed on the distal end side of the telescopic boom that is supplied with and stores the high frequency from the inverter, and a high frequency that is disposed on the suspension and supplied to the primary coil And a rectifier circuit for rectifying a high frequency induced in the secondary coil and connecting the rectified circuit to the charging battery, wherein the primary coil and the secondary coil include In the electronic device, the electronic device is disposed in a close position facing the suspension device when stored in the storage device, and is disposed in a separated position when the suspension device is not stored, and the charging battery is charged by a vehicle-side power supply when the suspension device is stored. A mobile crane having a hanging tool.

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