JP5455225B2 - Lifting device and crane having the same - Google Patents

Description

  The present invention relates to a lifting device and a crane including the lifting device.

Conventionally, a crane has been used as a material for transporting an object to be transported (see, for example, Patent Document 1). For example, as illustrated in FIG. 5, the crane 100 is used when loading and unloading the transported object B accommodated in the ship A.
The crane 100 includes a main body portion 101 provided with a driver's seat 101a, an arm 102 extending obliquely upward from the main body portion 101, and a wire portion 103 that passes through the arm 102 and hangs from the tip. Yes. A bucket 200 is provided at the tip of the wire portion 103.

Under such a configuration, the unloading work of the transported object B is performed as follows.
The operator S1 who controls the crane 100 turns the arm 102 in a state where the bucket 200 is opened and held upward, and the tip of the arm 102 is disposed above the ship A. Then, the bucket 200 is lowered and moved to the place to be transported B in the ship A. At this time, the worker S1 operates the crane 100 according to a signal from the worker S2 standing on the ship A.
Then, the bucket 200 is closed and a part of the object to be transported B is held in the bucket 200. In this state, the bucket 200 is raised and the arm 102 is unloaded and swung to the upper side of the point. Then, the bucket 200 is lowered to the unloading point and the bucket 200 is opened. Thereby, the to-be-conveyed object B is conveyed to the unloading point.

JP 2009-280367 A

  However, in the crane 100 as described above, since an impact applied to the bucket 200 is directly transmitted to the wire portion 103, there is a problem that the wire portion 103 is cut due to an increase in tension in the wire portion 103.

  The present invention has been made in order to solve such a problem, and provides an elevating device that can easily carry a work to be transported by preventing the wire portion from being cut and a crane including the lifting device. For the purpose.

In order to solve the above problems, the present invention provides the following means.
The present invention includes: an elevating part that raises and lowers a holding part that holds an object to be transported; a connecting part that connects the elevating part and a wire part hanging from a tip of a crane arm; and the elevating part and the holding part. Or an impact absorbing part that is provided between the elevating part and the connecting part and absorbs an impact from the holding part, and the connecting part is attached to the wire part; A disc-shaped top plate portion supported by the attachment portion, and the top plate portion is supported by the attachment portion by a plurality of support points arranged in a circumferential direction thereof. Features.

According to the present invention, it is possible to prevent an impact generated in the holding portion or the like from reaching the wire portion.
Therefore, it is possible to prevent the wire portion from being cut during the carrying work and carry the carried object easily.
Moreover, according to this invention, durability can be improved.

  Further, according to the present invention, the elevating unit includes a winding unit that moves the holding unit up and down, a driving unit that drives the winding unit, and a support unit that supports the winding unit and the driving unit. It is characterized by.

  According to this invention, the raising / lowering operation can be performed smoothly.

Further, in the present invention, the support portion is a plate-like member on which the winding portion and the drive portion are placed, and the top plate portion and the support portion are arranged to face each other in parallel, The top plate portion and the support portion are connected by the shock absorbing portion.

  According to this invention, an impact can be effectively absorbed by the impact absorbing portion.

  Further, the present invention is characterized in that the support point and the installation position of the impact absorbing portion are shifted in the circumferential direction of the top plate portion.

  According to this invention, the distance between the impact absorbing portion and the attachment position can be increased, and the impact from the impact absorbing portion can be prevented from reaching the attaching portion.

  Moreover, this invention is the raising / lowering apparatus as described in any one of Claim 1-6, The arm extended toward upper direction, The main-body part which supports the said arm, The wire part suspended from the said arm, It is characterized by providing.

  According to the present invention, it is possible to achieve the same effects as the lifting device according to any one of claims 1 to 6.

  According to the present invention, the wire part can be prevented from being cut, and the work to be carried can be easily carried out.

It is a block diagram which shows the crane in embodiment of this invention. It is a perspective view which expands and shows the raising / lowering apparatus of FIG. It is a top view which shows the modification of the bucket of FIG. It is a top view which shows the other modification of the bucket of FIG. It is a block diagram which shows the conventional crane.

Hereinafter, the crane in embodiment of this invention is demonstrated with reference to drawings.
FIG. 1 shows a crane 1 as an embodiment of the present invention.
The crane 1 includes a main body portion 11 having a driver's seat 11a and an arm 12 extending obliquely upward from the main body portion 11. The crane 1 also includes a wire portion 13 that hangs vertically from the tip of the arm 12 and a lifting device 2 that is detachably provided at the tip of the wire portion 13.

The main body 11 includes moving means 111 such as a caterpillar. When the operator operates the driver's seat 11a, the main body 11 is turned or the main body 11 is moved in a desired direction by driving the moving means 111.
The inclination angle of the arm 12 is changed by rotating in the vertical direction around the base end portion (connecting portion with the main body portion 11).
The wire portion 13 includes a wire 13a disposed inside the arm 12 so as to advance and retreat in the length direction of the arm 12, and a hook 13b attached to the wire 13a. The proximal end portion of the wire 13 a is wound around a winding portion (not shown) provided in the main body portion 11. The tip of the wire 13a is suspended from the tip of the arm 12 so as to be lifted and lowered.
The hook 13b includes a metal claw portion and a pulley (not shown). The hook 13b is attached to the wire 13a via a pulley (not shown).

As shown in FIG. 2, the lifting device 2 includes a lifting part 22 that lifts and lowers the bucket (holding part) 3, a wire connecting part (connecting part) 21 that connects the lifting part 22 and the wire part 13, and these lifting and lowering parts. An elastic connecting portion (impact absorbing portion) 23 for connecting the portion 22 and the connecting portion 21 is provided.
The wire connecting portion 21 includes an attachment portion 211 attached to the hook 13b and a top plate portion 212 supported by the attachment portion 211.
The attachment portion 211 is composed of four wires. The top plate 212 is formed in a disc shape. Then, one end of the attachment portion 211 is attached to each of four attachment positions (support points) 211P on the outer edge portion of the top plate portion 212. That is, the attachment part 211 supports the top plate part 212 via the attachment position 211P. Further, the other end of the attachment portion 211 is connected to one point on the top plate portion 212 concentrically. The attachment positions 211P are arranged at equal intervals in the circumferential direction of the top plate 212. Thus, the lifting device 2 is detachably connected to the wire portion 13 by attaching one concentric point of the attaching portion 211 to the hook 13b.

The elevating unit 22 includes a winding unit 222 that winds the elevating wire 2221, a driving unit 223 that rotationally drives the winding unit 222, and a communication unit 224 for remotely operating the driving unit 223. . The elevating unit 22 includes a supporting plate unit (supporting unit) 221 that supports the winding unit 222, the driving unit 223, and the communication unit 224, and a detachable connecting unit 2222 provided at the tip of the elevating wire 2221. .
The support plate portion 221 is formed in a disc shape, and is disposed concentrically facing the top plate portion 212. Note that the diameter of the support plate portion 221 is the same as the diameter of the top plate portion 212. And the winding part 222, the drive part 223, and the communication part 224 are being fixed to the upper surface of the support plate part 221. FIG. Further, a circular opening 221 a is formed at the center of the support plate 221.

The winding part 222 is formed in a cylindrical shape, and an elevating wire 2221 is wound around the outer peripheral surface thereof. When the winding part 222 rotates in the forward direction, the lifting wire 2221 is wound up. On the other hand, when the winding part 222 rotates in the reverse direction, the lifting wire 2221 is sent out. The lifting wire 2221 hangs downward from the winding portion 222 through the opening 221a in the vertical direction.
The drive unit 223 is made of, for example, a motor, and rotates the winding unit 222 forward or backward.
The communication unit 224 is for communicating with the operation terminal 4. When the communication unit 224 receives a forward rotation or reverse rotation instruction signal from the operation terminal 4, the communication unit 224 rotates the winding unit 222 forward or backward according to the instruction. Note that the operation terminal 4 may be used to perform a moving operation or turning operation of the main body unit 11, an elevating operation of the wire unit 13, or the like.

The detachable connecting portion 2222 includes a cylindrical connecting rod 222a and a U-shaped member 222b formed in a U-shape. The connecting rod 222a can be inserted and removed across both walls of the U-shaped member 222b. Further, the tip of a lifting wire 2221 is attached to the connecting rod 222a.
In addition, the tip of the wire 5 is attached to the bucket 3, and the attachment ring 5a is attached to the base end.
Under such a configuration, with the U-shaped member 222b inserted through the attachment ring 5a, the connecting rod 222a to which the lifting wire 2221 is attached is inserted over both walls of the U-shaped member 222b, whereby the bucket 3 is The elevating part 22 is detachably connected. In addition, when changing the bucket 3, it is only necessary to remove the connecting rod 222a and attach another holding portion in the same manner.

  The elastic connecting portions 23 are formed in a columnar shape, and four elastic connecting portions 23 are provided at equal intervals in the circumferential direction of the top plate portion 212 and the support plate portion 221. These four elastic connection parts 23 are arrange | positioned between the attachment positions 211P adjacent to the circumferential direction. In other words, the elastic connecting portion 23 and the attachment position 211P are arranged shifted (offset) in the circumferential direction in plan view. Specifically, the elastic connecting portion 23 and the base end portion of the attachment portion 211 are arranged alternately at equal intervals in the circumferential direction in plan view. The elastic connecting portion 23 is made of an elastic member such as rubber or a spring. The elastic connecting portion 23 is elastically deformed, so that when an impact is applied to the members below (including the lifting and lowering portion 22) from the lifting and lowering portion 22, the impact is absorbed.

Next, operation | movement of the crane 1 in this embodiment comprised in this way is demonstrated.
First, the crane 1 is moved to the vicinity of the ship A in a state where the lifting device 2 and the bucket 3 are connected. Then, the operator S operates the operation terminal 4 to place the tip of the arm 12 above the ship A by the turning operation of the main body 11 and the expansion / contraction operation of the arm 12. Then, the operator S uses the operation terminal 4 to instruct the winding unit 222 to rotate in the reverse direction without moving the wire unit 13 up and down. When the operation terminal 4 transmits a reverse rotation instruction signal, the communication unit 224 receives the reverse rotation instruction signal and outputs a reverse rotation instruction to the drive unit 223. Thereby, the winding part 222 rotates reversely and the raising / lowering wire 2221 is sent out through the opening part 221a.

  Therefore, the elevating wire 2221 descends, and the bucket 3 reaches the transported object B. Then, the operator S operates the operation terminal 4 to close the buckets 3 with each other. As a result, the transported object B is accommodated in the bucket 3. In this state, the operator S uses the operation terminal 4 to instruct the winding unit 222 to rotate forward. When the operation terminal 4 transmits a forward rotation instruction signal, the communication unit 224 receives the forward rotation instruction signal and outputs a forward rotation instruction to the drive unit 223. Thereby, the winding part 222 rotates forward and the lifting wire 2221 is wound up through the opening 221a. Therefore, the bucket 3 rises via the lifting wire 2221. Then, when the bucket 3 is disposed at a predetermined height, the operation of the operation terminal 4 by the operator S stops the lifting of the bucket 3, and further by the turning operation of the main body 11 and the expansion and contraction operation of the arm 12, The transported object B is transported to a predetermined unloading point.

Here, when the transported object B is transported, the transported object B, the ship A, or the like may come into contact with the bucket 3, the lifting wire 2221, the wire 5, or the like, and an impact may be applied to them. According to the crane 1 in this embodiment, the impact is prevented from being transmitted to the wire portion 13 as follows.
That is, when the object B or the ship A contacts the bucket 3, the lifting wire 2221, the wire 5, the impact is transmitted from there to the lifting unit 22. Then, due to the impact transmitted to the elevating part 22, the elastic connecting part 23 is elastically deformed vertically and horizontally, and the impact is alleviated. That is, the elastic connecting portion 23 functions as an impact absorbing portion that absorbs an impact. For this reason, the impact does not reach the wire connecting portion 21, and does not reach the wire portion 13. Therefore, it is possible to prevent a momentary increase in tension caused by an impact from acting on the wire portion 13.

As mentioned above, according to the raising / lowering apparatus 2 in this embodiment, since it can prevent that the impact which generate | occur | produced with the bucket 3 etc. reaches | attains the wire part 13, cutting | disconnection of the wire part 13 during conveyance work is prevented. The carrying work of the article to be carried B can be easily performed.
Moreover, since the raising / lowering part 22 is equipped with the winding part 222, the drive part 223, the communication part 224, and the support plate part 221, the raising / lowering operation | movement can be performed smoothly.
Moreover, since the top plate part 212 and the support plate part 221 are connected by the elastic connection part 23, an impact can be absorbed effectively.

Further, since the top plate portion 212 formed in a disc shape is supported by the mounting portion 211 by a plurality of mounting positions 211P arranged in the circumferential direction, it is possible to prevent stress from being concentrated on a part. And durability can be improved. Furthermore, since the attachment positions 211P are arranged at equal intervals in the circumferential direction, the durability can be further improved.
In addition, since the elastic connecting portion 23 and the mounting position 211P are arranged in a circumferential direction (offset) in plan view, the distance between the elastic connecting portion 23 and the mounting position 211P is increased. It is possible to prevent the impact from the elastic connecting portion 23 from reaching the mounting portion 211. Further, since the elastic connecting portion 23 and the attachment position 211P are alternately arranged at equal intervals in the circumferential direction in a plan view, the impact from the elastic connecting portion 23 reaches the attachment portion 211. Can be prevented more effectively.

  Moreover, since the bucket 3 is detachably connected to the elevating part 22, the convenience of carrying work can be improved.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, instead of the bucket 3, as shown in FIG. 3, a U-shaped holding portion 6 can be provided in a plan view. Thereby, the to-be-transported object B2 such as a coil can be held and transported.
In addition, as shown in FIG. 4, a substantially C-shaped holding portion 7 can be provided in a plan view. The holding portion 7 is provided with a cylinder (not shown) so that the holding main body portion 7a can be expanded and contracted in the width direction W. As a result, it is possible to appropriately hold objects of various sizes.
The bucket 3 and the holding units 6 and 7 can be selectively replaced depending on the type of the object to be transported.

In addition, the elastic connecting portion 23 is made of rubber or a spring. However, the elastic connecting portion 23 is not limited to this, and any member that absorbs impact may be used. For example, an isolator (laminated rubber isolator, sliding bearing, rolling bearing) or a damper (oil, steel, lead) may be used.
Moreover, although the impact absorption part is the elastic connection part 23, it is not restricted to this, The installation position can be changed suitably. For example, you may install an impact-absorbing part in the raising / lowering wire 2221, the attachment / detachment connection part 2222, the wire 5, the attachment ring 5a, etc.

1 Crane 2 Lifting device 3 Bucket (holding part)
6, 7 Holding part 12 Arm 13 Wire part 21 Wire connection part (connection part)
22 Lifting part 23 Elastic connecting part (shock absorbing part)
211 Mounting part 211P Mounting position (support point)
212 Top plate part 221 Support plate part (support part)
222 Winding part 223 Drive part B, B2 Conveyed object

Claims (6)

An elevating part that raises and lowers a holding part for holding the object to be transported;
A connecting part for connecting the lifting part and a wire part hanging from the tip of the arm of the crane;
Provided between the elevating part and the holding part, or provided between the elevating part and the connecting part, and comprising an impact absorbing part for absorbing an impact from the holding part,
The connecting portion is
An attachment portion attached to the wire portion;
A disc-shaped top plate portion supported by the mounting portion;
The top plate is
The lifting device is supported by the mounting portion by a plurality of support points arranged in the circumferential direction . The elevating part is
A winding part for raising and lowering the holding part;
A drive unit for driving the winding unit;
The lifting device according to claim 1, further comprising a support portion that supports the winding portion and the driving portion. The support part is
A plate-like member on which the winding part and the driving part are placed;
The top plate portion and the support portion are arranged to face each other in parallel,
The elevating device according to claim 2 , wherein the top plate portion and the support portion are connected by the shock absorbing portion. The lifting device according to claim 3 , wherein the support point and the installation position of the shock absorbing portion are shifted in a circumferential direction of the top plate portion. The elevating device according to any one of claims 1 to 4 , wherein the elevating unit and the holding unit are detachably connected. The lifting device according to any one of claims 1 to 5 ,
An arm extending upward;
A main body for supporting the arm;
A crane comprising a wire portion depending from the arm.

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