WO2024048403A1 - 電気チェーンブロック - Google Patents

電気チェーンブロック Download PDF

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Publication number
WO2024048403A1
WO2024048403A1 PCT/JP2023/030422 JP2023030422W WO2024048403A1 WO 2024048403 A1 WO2024048403 A1 WO 2024048403A1 JP 2023030422 W JP2023030422 W JP 2023030422W WO 2024048403 A1 WO2024048403 A1 WO 2024048403A1
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WO
WIPO (PCT)
Prior art keywords
chain
attachment
hole
bucket
electric
Prior art date
Application number
PCT/JP2023/030422
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English (en)
French (fr)
Japanese (ja)
Inventor
京介 山野
Original Assignee
株式会社日立産機システム
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社日立産機システム filed Critical 株式会社日立産機システム
Priority to JP2024544173A priority Critical patent/JPWO2024048403A1/ja
Publication of WO2024048403A1 publication Critical patent/WO2024048403A1/ja

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/18—Power-operated hoists
    • B66D3/26—Other details, e.g. housings

Definitions

  • the present invention relates to a chain hoist for hoisting and moving a suspended load, and particularly to an electric chain hoist using an electric motor.
  • a load chain is attached to a hanging tool (hanging hook) on which a sling wire is hung, and a sprocket rotated by an electric motor winds up the load chain to lift a suspended load in the vertical direction.
  • the wound load chain is stored in a chain bucket, and when a suspended load is to be lowered, the sprocket is rotated in the opposite direction to let out the load chain from the chain bucket.
  • the electric chain hoist requires a chain bucket to store the load chain that is discharged to the side opposite to the suspended load.
  • the depth of the bottom of the chain bucket is roughly determined by the capacity of the load chain to be stored, but depending on the environment in which it is used, such as the tension of the sling wire and the size of the suspended load, the lifting device may reach its maximum lift.
  • the suspended load and the chain bucket may interfere with each other before the lifting of the suspended load, resulting in the inconvenience that the suspended load cannot be hoisted up to its maximum lifting height.
  • Patent Document 1 discloses the following electric chain hoist.
  • the length of the chain bucket in the depth direction is shortened as much as possible, and the bottom surface of the chain bucket is raised to prevent the slinging equipment and the suspended load from getting in the way when hoisting is at its limit, and to prevent the suspended load from getting in the way.
  • An electric chain hoist is shown that prevents the chain from being pushed up into the bucket by the operator.
  • the chain bucket is inflated outward in order to shorten the length of the chain bucket in the depth direction and store a specified amount of load chain. Therefore, the dimension from the center to the outermost surface of the chain hoist (hereinafter referred to as the offset dimension) becomes large, making it unsuitable for installation environments that require a short offset dimension.
  • the length of the chain bucket in the depth direction must be increased in order to accommodate a specified amount of load chain. If such a configuration is adopted, an operating environment arises in which the suspended load and the chain bucket interfere with each other, making it impossible to hoist the suspended load to the maximum lifting height.
  • An object of the present invention is to provide an electric chain hoist that can be used in an installation environment where a short side length is required and an operating environment where the chain bucket and suspended load interfere with each other using a single chain bucket.
  • the present invention provides a chain bucket consisting of a fixed part that is attached and fixed to the chain block main body and a storage part that stores the load chain. , a first installation form with a shorter offset dimension, or (2) an alternative with a larger offset dimension when rotated 180 degrees around the axis from the open end of the chain bucket toward the bottom surface compared to the first installation format.
  • the present invention is characterized in that it can be attached to the chain block main body in either of the following attachment modes, in which the length in the vertical direction from the bottom of the chain bucket to the floor is longer.
  • a single chain bucket can be used in an installation environment where short side dimensions are required and an operating environment where the chain bucket and suspended load interfere with each other.
  • FIG. 2 is a configuration diagram showing a side surface and a top surface of a chain bucket applied to the electric chain hoist according to the present invention.
  • FIG. 2 is a front view showing the front of the chain bucket shown in FIG. 1 in a first attachment form.
  • 2 is a rear view showing the back of the chain bucket shown in FIG. 1.
  • FIG. FIG. 2 is a front view showing the front of the chain bucket shown in FIG. 1 in a second attachment form.
  • FIG. 2 is a front view of an electric chain hoist with a chain bucket attached in a first attachment mode.
  • FIG. 3 is a front view of an electric chain hoist with a chain bucket attached in a second attachment mode. It is a front view of a general electric chain hoist. It is a side view of a general electric chain hoist seen from the side.
  • FIG. 2 is a control circuit diagram of a control section of a general electric chain hoist.
  • FIG. 5 shows a front view of the electric chain hoist
  • FIG. 6 shows a side view of the electric chain hoist
  • FIG. 7 shows a control circuit of a control section of the electric chain hoist.
  • the electric chain hoist 100 includes an electric motor 1, a reduction unit 2, an electromagnetic brake 3, a lifting device 4, an operation input device 5, a chain bucket 6, a sprocket 7, a hanging device 8, and many others. It has a load chain 9 formed by connecting link pieces, and a control section 10 (see FIG. 7).
  • the electric chain hoist 100 is attached with a lifting tool 4 for hanging the electric chain hoist 100 from a beam of a building or the like.
  • an electric motor 1 is attached to the electric chain hoist 100, and the electric motor 1 hoists up a hanging device (load block) 8 for suspending a suspended load via a load chain 9.
  • a deceleration section 2 for decelerating the rotation generated by the electric motor 1 is connected to the electric motor 1 .
  • the rotational force of the electric motor 1 decelerated by the deceleration unit 2 is transmitted to the sprocket 7.
  • An electromagnetic brake 3 is attached to the electric motor 1 to stop the rotation generated by the electric motor 1.
  • a load chain 9 is engaged with the sprocket 7.
  • a control unit 10 (see FIG. 7) that controls the operation of the electric motor 1 and the electromagnetic brake 3 is attached to the electric chain hoist 100.
  • control unit 10 of the hoisting machine is provided with a male power connector 12 that connects to a female power connector 11, and power is supplied to the control unit 10.
  • a power cable 15 is connected to the power female connector 11.
  • the control unit 10 is also provided with a male operation connector 14 that connects to the female operation connector 13 of the operation input device 5, and operation information of the operation input device 5 is input to the control unit 10.
  • An operation cable 16 is connected to the operation female connector 13.
  • the female power connector 11 and the male power connector 12, and the female operation connector 13 and the male operation connector 14 are each detachable.
  • the magnetic contactor (coil) 23 By being energized, the electromagnetic contactor (contact) 24 is closed, and the electric motor 1 is energized through the contact of the overwinding prevention device 25.
  • the electromagnetic brake 3 is also energized, the electromagnetic brake 3 is released, and the electric motor 1 starts rotating.
  • the rotational power of the electric motor 1 is reduced to a predetermined rotational speed by the reduction unit 2, and the rotation is transmitted to the load chain 9 by the sprocket 7 connected to the final reduction stage, and the lowering tool 8 is hoisted through the load chain 9. , or lowering the suspended load.
  • the main body of the electric chain hoist 100 is provided with a chain bucket 6 that stores a load chain 9 and is suspended from a chain 17.
  • a chain bucket 6 that stores a load chain 9 and is suspended from a chain 17.
  • the length of the chain bucket in the depth direction must be increased so that a specified amount of load chain can be accommodated. If such a configuration is adopted, an operating environment arises in which the suspended load and the chain bucket interfere with each other, making it impossible to hoist the suspended load to the maximum lifting height.
  • an electric chain hoist that can cope with an installation environment where a short side dimension is required and an operating environment where the chain bucket and suspended load interfere with each other with a single chain bucket.
  • the structure of the chain bucket consists of a fixed part that is attached and fixed to the chain block main body, and a storage part that stores the load chain that is integrally formed with this fixed part. This is different from the hanging structure using chains.
  • the chain bucket is attached to the chain block main body in a first attachment mode in which the vertical length from the bottom surface of the chain bucket to the floor surface is short, but the offset dimension is short.
  • the offset dimension is larger, but from the bottom of the chain bucket to the floor. It is attached to the chain block main body in a second attachment form in which the length in the vertical direction is longer.
  • one chain bucket can be used in installation environments that require short side dimensions and in operating environments where the chain bucket and suspended load interfere with each other.
  • the electric chain hoist according to the embodiment is characterized by being equipped with a reversible chain bucket 30.
  • FIG. 1 shows a reversible chain bucket (hereinafter simply referred to as chain bucket) 30, and this chain bucket 30 consists of a box-shaped chain storage section 31 and a pair of fixing sections 32.
  • chain bucket 30 When viewed with the chain bucket 30 attached to the chain block main body, the chain storage section 31 is formed into a box-like shape having an opening 33 at the upper end through which the chain enters and exits. Therefore, the opposite side of the opening 33 becomes the bottom surface.
  • a pair of fixing parts 32 are formed on the side of the opening 33, and these fixing parts 32 are bolted to a pair of mounting flanges 36 (see FIG. 3) formed on the chain block main body, which will be described later. It is something that For this reason, the pair of fixing parts 32 are formed with attachment through holes 32h-1, 32h-2, and 32i.
  • the chain storage section 31 and the fixing section 32 are integrally molded from synthetic resin.
  • this chain bucket 30 is sized so that it can be attached to an existing electric chain hoist. That is, since the electric chain block has a mounting flange 36 formed on the chain block main body, the fixing portion 32 is dimensioned so as to be attached to this mounting flange 36.
  • FIGS. 2A and 2B show the surface of the chain bucket 30 viewed from a direction perpendicular to the direction in which the pair of fixing parts 32 are arranged, and FIG. 2A shows the surface of the chain bucket 30 when it is attached in the "first attachment mode”.
  • FIG. 2B shows the "Side B" side of FIG. 1 when attached in the "second attachment mode”. In other words, if “side A” is the front side, “side B” is the back side.
  • FIGS. 2A and 2B are views of the chain block main body 35 when viewed from the same direction.
  • the chain bucket 30 in the mounting configuration shown in FIG. 2A is mounted in a state rotated by 180 degrees around the axis "C" extending from the open end 33 of the chain bucket 30 toward the bottom surface 34, as shown in FIG. 2B. It is.
  • the axis "C” is an axis passing through the center of the top and bottom surfaces of the opening 33 of the chain bucket 30.
  • Mounting through holes 32h-1, 32h-2, and 32i are formed in the pair of fixing parts 32, and as shown in FIG. A fixing bolt for fixing to the mounting flange 36 is inserted therethrough.
  • the distance (pitch) between the centers of the attachment through hole 32h-1 and the attachment through hole 32h-2 is the same as the distance (pitch) between the centers of the attachment through hole 32h-2 and the attachment through hole 32i. be. Furthermore, the distance (pitch) between the centers of the two mounting holes provided in the mounting flange 36 is also the same. Therefore, the chain bucket 30 can be fixed to the mounting flange 36 by inserting and fixing these fixing bolts.
  • the mounting form is a "first mounting form" where the mounting through hole 32h-1 and the mounting through hole 32h-2 shown in FIG. 2A are used for fixing, and the mounting through hole 32i is a waste hole.
  • a line segment connecting the centers of the attachment through hole 32h-1 and the attachment through hole 32h-2 is perpendicular to the axis of the chain bucket 30.
  • This "first attachment form” is an attachment state in which the deviation dimension is the minimum.
  • the case of fixing using the attachment through hole 32h-2 and the attachment through hole 32i is the "second attachment form", and the attachment through hole 32h-1 is used as a waste hole. Become. The actual mounting state will be at an angle as shown in FIG. 2C.
  • a line segment connecting the centers of the attachment through hole 32h-1 and the attachment through hole 32h-2 and a line segment connecting the centers of the attachment through hole 32h-2 and the attachment through hole 32i form a predetermined angle ⁇ . It is formed with
  • the attachment through hole 32i is located below the line segment connecting the centers of the attachment through hole 32h-1 and the attachment through hole 32h-2.
  • the pair of fixing parts 32 are formed with attachment through holes 32h-1, 32h-2, and 32i at the same position so that fixing bolts can be inserted therethrough.
  • a mounting flange 36 is formed on the side surface of the chain block main body, and the fixing portion 32 of the chain bucket 30 is fixed to this mounting flange 36 with a fixing bolt.
  • the fixing bolt cooperates with the mounting flange 36 to sandwich the fixing portion 32 to fix the chain bucket 30.
  • the fixed parts 32 of the chain bucket 30 are a pair of fixed parts 32, and the pair of fixed parts 32 are fixed to the flat mounting flanges 36 formed on the chain block main body 31 with fixing bolts.
  • this mounting flange 36 is also formed on an existing electric chain hoist, it is easy to fix the fixing portion 32 of the chain bucket 30 to the mounting flange 36 with fixing bolts.
  • FIG. 3 shows a "first mounting form", and this mounting form is a form used in an environment where a short offset dimension is required.
  • the chain bucket 30 may be fixed with fixing bolts using the mounting through holes 302h-1 and 32h-2 formed in the fixing portion 32 of the chain bucket 30. In this state, the vertical length from the bottom surface 34 of the chain bucket 30 to the floor (not shown) is short, but the offset dimension is short.
  • FIG. 4 shows a "second mounting form", and this mounting form is used in an environment where there is no restriction on offset dimensions and a maximum lift is required.
  • the chain bucket 30 may be installed so as to be inclined in the direction away from the chain block main body 31.
  • the chain bucket 30 may be fixed with a fixing bolt using the mounting through hole 302h-1 and the mounting through hole 32i formed in the fixing part 32.
  • This "second attachment form” is an attachment state in which the lifting height of the lower hanging tool is the maximum lifting height, and the chain bucket 30 does not interfere with the sling wire SW of the suspended load SL.
  • the fixing part 32 of the chain bucket 30 is formed with at least a first attachment through hole 32h-1, a second attachment through hole 32h-2, and a third attachment through hole 32i.
  • a line segment connecting the centers of the second attachment through hole 32h-1 and the second attachment through hole 32h-2 is provided to be orthogonal to the axis (C) of the chain bucket 30.
  • a line segment connecting the centers of the third attachment through hole 32i and the second attachment through hole 32h-2 is provided at a predetermined angle with the axis (C) of the chain bucket 30.
  • first attachment form it is fixed to the attachment flange 36 of the chain block main body 31 using the first attachment through hole 32h-1 and the second attachment through hole 32h-2. Furthermore, in the second attachment form, it is fixed to the attachment flange 36 of the chain block main body 31 using the third attachment through hole 32i and the second attachment through hole 32h-2.
  • the chain bucket 30 can be easily retrofitted even to an electric chain hoist equipped with an existing mounting flange.
  • the present invention is not limited to the few embodiments described above, and includes various modifications.
  • the above-described embodiments have been described in detail to explain the present invention in an easy-to-understand manner, and the present invention is not necessarily limited to having all the configurations described.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
PCT/JP2023/030422 2022-09-02 2023-08-24 電気チェーンブロック WO2024048403A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2024544173A JPWO2024048403A1 (enrdf_load_stackoverflow) 2022-09-02 2023-08-24

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-140060 2022-09-02
JP2022140060 2022-09-02

Publications (1)

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WO2024048403A1 true WO2024048403A1 (ja) 2024-03-07

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PCT/JP2023/030422 WO2024048403A1 (ja) 2022-09-02 2023-08-24 電気チェーンブロック

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6337696U (enrdf_load_stackoverflow) * 1986-08-29 1988-03-10
JP2005126238A (ja) * 2003-09-30 2005-05-19 Kito Corp 巻上装置における粉塵飛散防止装置
KR200442937Y1 (ko) * 2007-10-01 2008-12-23 주식회사 엘케이 호이스트용 체인박스 및 이를 구비한 체인 호이스트
JP2011178509A (ja) * 2010-03-01 2011-09-15 Kito Corp チェーンバケットの退避装置
JP2012126545A (ja) * 2010-12-17 2012-07-05 Hitachi Industrial Equipment Systems Co Ltd 電気チェーンブロック
US20150090946A1 (en) * 2013-10-01 2015-04-02 Jpw Industries Inc. Variable speed chain hoist with integrated control

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6337696U (enrdf_load_stackoverflow) * 1986-08-29 1988-03-10
JP2005126238A (ja) * 2003-09-30 2005-05-19 Kito Corp 巻上装置における粉塵飛散防止装置
KR200442937Y1 (ko) * 2007-10-01 2008-12-23 주식회사 엘케이 호이스트용 체인박스 및 이를 구비한 체인 호이스트
JP2011178509A (ja) * 2010-03-01 2011-09-15 Kito Corp チェーンバケットの退避装置
JP2012126545A (ja) * 2010-12-17 2012-07-05 Hitachi Industrial Equipment Systems Co Ltd 電気チェーンブロック
US20150090946A1 (en) * 2013-10-01 2015-04-02 Jpw Industries Inc. Variable speed chain hoist with integrated control

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JPWO2024048403A1 (enrdf_load_stackoverflow) 2024-03-07

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