JP2018062414A - Hook device for movable crane and movable crane including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hook device for a movable crane capable of improving a collision-resistant performance of a rotation drive mechanism and a movable crane including the hook device.SOLUTION: A first hook device 6A includes: first and second sheaves 15A, 15B which are wounded with a wire rope 14 and are rotatably attached to one end and the other end of a first sheave shaft 31 in an axial direction; first and second sheave covers 30A, 30B which are rotatably engaged with the one end and the other end of the first sheave shaft 31 in the axial direction; a hook 16 which is rotatably provided around an axis orthogonal to a rotation axis of the first sheave shaft 31; and a rotation drive mechanism which includes an electric motor 40, a remote control device 42, a battery 41 and a reduction gear 44, and rotationally drives the hook 16 by a remote operation. Further, the whole of the rotation drive mechanism is housed in a space sandwiched between the first and second sheave covers 30A, 30B.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a mobile crane hook device having a rotary drive mechanism that rotates a hook around an axis orthogonal to the axial direction of a hook support shaft based on a remote operation signal, and a mobile crane including the same.

As a hook device provided with the above rotation drive mechanism, for example, there is a rotation drive type lifting hook device described in Patent Document 1.
This rotary drive type lifting hook device includes a rotary drive device that can be operated remotely, and is configured such that the lifting hook can be rotated by remote operation.

Japanese Utility Model Publication No. 6-37262

However, in the rotary drive type lifting hook device of Patent Document 1, a semicircular sheave cover covers the lower semicircles of the left and right sheave wheels. However, the rotary drive device, battery, radio controller, etc., which exist between the two sheave wheels and constitute the rotary drive mechanism, are covered with a protective guard, but are within the outer diameter of the relatively sturdy sheave cover. Does not fit and protrudes outward. For this reason, if the hook is accidentally collided with a suspended load or the ground, collision resistance is insufficient and the rotary drive mechanism may be damaged.
In particular, mobile cranes are often used in underground tunnel construction, etc., and hooks can be lowered from the surface where mobile cranes are installed to several tens of meters, making collisions easy with a few operating mistakes. Occurs.

Further, the rotary drive type lifting hook device of Patent Document 1 does not have means for generating electric power for charging the battery and means for charging the battery. Therefore, when the battery power is insufficient, for example, it is necessary to replace the battery with a spare battery or to charge the battery with the power of the external power source.
Therefore, the present invention has been made paying attention to such problems, and a hook device for a mobile crane capable of improving the collision resistance of a rotary drive mechanism and a mobile crane including the same It is the first purpose to provide.

  A second object of the present invention is to provide a mobile crane hook device capable of charging a battery for supplying electric power to electric system components of the rotary drive mechanism by self-generated power generation, and a mobile crane including the same.

  In order to solve the above-mentioned problem, the hook device for a mobile crane according to the first aspect of the present invention has a wire rope that is rotatably attached to one end side and the other end side in the axial direction of the sheave shaft. A plurality of sheaves, two sheave covers attached to one end and the other end in the axial direction of the sheave shaft, a hook provided rotatably around an axis orthogonal to the rotation axis of the sheave shaft, A rotation drive mechanism for rotating the hook around the orthogonal axis in response to reception of an operation signal, and the rotation drive mechanism is entirely accommodated in a space sandwiched between the two sheave covers. ing.

  In order to solve the above-mentioned problem, the hook device for a mobile crane according to the second aspect of the present invention is arranged around the axis orthogonal to the swing axis of the hook support shaft at the center in the longitudinal direction of the hook support shaft. A hook that is rotatably mounted, a rotation drive mechanism that rotates the hook around the orthogonal axis in response to reception of a remote operation signal, and a self-generated generator that generates electric power by converting vibration energy into electric energy The rotational drive mechanism includes an electric motor, a receiver of a remote operation signal, a control device that drives and controls the electric motor based on the remote operation signal received by the receiver, the electric motor, A rechargeable battery that supplies power to the receiver and the control device, and is configured to charge the battery using the power generated by the self-generated generator.

  Moreover, in order to solve the said subject, the mobile crane which concerns on the 3rd aspect of this invention is the hook device for mobile cranes which concerns on the said 1st aspect, or the hook for mobile cranes which concerns on the said 2nd aspect. Equipment.

  According to the mobile crane hook device according to the first aspect, the entire rotation drive mechanism is accommodated in the space inside the two sheave covers, and the rotation drive mechanism does not protrude outward from the sheave cover. It becomes. As a result, when the hook device collides with a suspended load or the ground, the rotary drive mechanism can be protected from the collision by the sheave cover, and the collision resistance of the rotary drive mechanism can be improved. Moreover, it becomes possible to make a protective guard unnecessary.

  The mobile crane hook device according to the second aspect includes a rechargeable battery that supplies electric power to the electric system components of the rotary drive mechanism, and converts vibration energy into electric energy to generate electric power. Equipped with a self-generated generator. And it is comprised so that a battery may be charged with the electric power generated by this self-generated generator. Thus, for example, by mounting the crane hook device according to the second aspect on a mobile crane such as a vehicle-mounted crane, it becomes possible to generate power by vibration generated during the movement of the crane, The battery can be charged while moving. As a result, it is possible to reduce the occurrence of troublesome work such as replacing the battery during the work.

  Moreover, according to the mobile crane which concerns on the said 3rd aspect, it becomes possible to improve the collision resistance of a rotary drive mechanism, and to improve the reliability of a crane. In addition, the method of charging the battery of the rotary drive mechanism is facilitated, and the usability of the crane can be improved.

(A) And (b) is the side view and front view of a boom front-end | tip part of the state which suspended the 1st hook apparatus concerning 1st Embodiment. It is the perspective view which looked at the 1st hook device concerning a 1st embodiment from the back side. It is the sectional view on the AA line of FIG.1 (b). It is the perspective view which looked at the 1st hook device concerning a 1st embodiment from the slanting upper part. It is a block diagram which shows the specific structure of a hook remote control machine and a rotational drive mechanism. It is a figure which shows the specific structure of the self-generated generator which concerns on 1st Embodiment. (A) And (b) is a figure explaining the operation | movement which stores the 1st hook apparatus of the crane which concerns on 1st Embodiment. It is the figure which looked at the boom of the crane from the upper side in the hook storing state of the 1st hook device, and is a figure which omitted a part of boom. It is a figure which shows an example which mounted the crane which concerns on 1st Embodiment in the truck. (A) And (b) is the side view of the boom front-end | tip part of the state which suspended and stored the 2nd hook apparatus concerning 2nd Embodiment. It is the perspective view which looked at the 2nd hook device concerning a 2nd embodiment from the side. It is the BB sectional drawing of FIG. It is a figure which shows an example which mounted the crane which concerns on 2nd Embodiment in the truck. It is a figure which shows the modification which mounted the 1st hook apparatus which concerns on 1st Embodiment in the crawler crane. (A) is a perspective view of a rear view showing an example in which the enlarged sheave cover is attached to the first hook device, and (b) is enlarged by attaching an expansion option to the sheave cover of the first hook device. It is a perspective view of the rear view which shows an example.

  Hereinafter, first to second embodiments of the present invention will be described with reference to the drawings as appropriate. The drawings are schematic. For this reason, it should be noted that the relationship between the thickness and the planar dimension, the ratio, and the like are different from the actual ones, and the dimensional relationship and the ratio are different between the drawings. In addition, the following first to second embodiments exemplify apparatuses and methods for embodying the technical idea of the present invention, and the technical idea of the present invention is the material of the component, A shape, a structure, arrangement | positioning, etc. are not specified to the following embodiment.

(First embodiment)
As shown in FIGS. 1 to 4, the first hook device 6A according to the first embodiment includes a first sheave 15A, a second sheave 15B, a hook 16, a first sheave cover 30A, and a second sheave cover. Sheave cover 30B. Further, a first sheave shaft 31 that also serves as a hook support shaft, a retaining plate 32, a hook retaining member 34, a pair of brackets 36, a pair of attachment members 37, and two guide rollers 38 are provided.
As shown in FIGS. 1A and 1B, the first hook device 6A is suspended by a wire rope 14 from the tip of the boom 5 provided in the crane 1A.

Here, the first boom side sheave 10A is pivotally supported on the left side and the second boom side sheave 10B is pivotally supported on the right side by a boom side sheave shaft 25 at the front end portion of the boom 5 when viewed from the front. Yes. A guide plate 27 having an arcuate guide surface is attached between the first boom side sheave 10A and the second boom side sheave 10B. A guide sheave 11 for guiding the end of the wire rope 14 to a socket 51 and a cotter 52, which are fixing members, is attached to the left side of the first boom-side sheave 10A.
The first sheave cover 30A is provided on the front (front) side when the front end of the boom 5 is viewed from the front, and the second sheave cover 30B is the same as the first sheave cover 30A when the front end of the boom 5 is viewed from the front. Oppositely provided on the back (rear) side. Further, the first and second sheave covers 30A and 30B are formed in a trapezoidal shape at the top and a semicircular shape at the bottom when viewed from the front.

  The first sheave shaft 31 is a trunnion-type shaft, and as shown in FIGS. 2 to 4, a rectangular parallelepiped middle shaft portion 31 a and a columnar shape projecting from the center of both longitudinal end surfaces of the middle shaft portion 31 a. It has a convex shaft portion 31b and a circular through hole 31c that vertically passes through the central portion in the longitudinal direction of the middle shaft portion 31a. Then, the first and second sheave covers are formed by fitting the convex shaft portions 31b into the circular through holes 30h provided at the approximate centers of the first sheave cover 30A and the second sheave cover 30B. A first sheave shaft 31 is rotatably provided between 30A and 30B. The retaining plates 32 are fixed to the convex shaft portions 31b at both ends of the first sheave shaft 31 by retaining bolts 33, so that the first sheave cover 30A and the second sheave cover 30B fall off from the first sheave shaft 31. It is preventing.

The first sheave 15A is pivotally attached to the convex shaft portion 31b of the first sheave shaft 31 on the first sheave cover 30A side via a radial bearing 35, and the second sheave 15B is the second sheave 15B of the first sheave shaft 31. A radial shaft 35 is pivotally attached to the convex shaft portion 31b on the sheave cover 30B side.
The hook 16 is inserted into the through-hole 31c provided in the middle shaft portion 31a of the first sheave shaft 31 from the lower side to the upper side, and the hook 16 is inserted through the thrust bearing 39 above the middle shaft portion 31a. The sheave shaft 31 is attached so as to be rotatable about an axis orthogonal to the rotation axis of the sheave shaft 31. The hook stopper 34 is attached to the upper end side of the hook 16 and prevents the hook 16 from coming off from the first sheave shaft 31.

The pair of brackets 36 are separated from each other between the upper ends of the first and second sheave covers 30 </ b> A and 30 </ b> B in the front-rear direction and spanned in the front-rear direction via a pair of attachment members 37. The portion is fixed to the first and second sheave covers 30A and 30B with bolts. Two pins are provided between the pair of brackets 36 so as to be separated from each other in the front-rear direction. A guide roller 38 that rolls in contact with the guide surface of the guide plate 27 is provided with a bearing (not shown). It is pivoted through.
The first hook device 6A further includes an electric motor 40, a battery 41, a remote control device 42, a speed reducer 44, a mounting member 45, and a battery mounting member 46, as shown in FIGS. The first self-generated generator 47A, the second self-generated generator 47B, and the waterproof cover 48 are provided.

The attachment member 45 is formed in a flat plate shape and has a circular first through hole 45a for the motor shaft 40a, and a hook shaft provided at a position adjacent to the first through hole 45a in the longitudinal direction with a predetermined gap therebetween. And a circular second through hole 45b for 16a. The first through hole 45a has a diameter larger than the diameter of the motor shaft 40a, and the second through hole 45b has a diameter larger than the diameter of the hook shaft 16a.
The attachment member 45 is provided on the upper surface of the middle shaft portion 31 a of the first sheave shaft 31 so that the second through hole 45 b is concentric with the through hole 31 c of the first sheave shaft 31. In addition, the longitudinal direction of itself is provided in a direction orthogonal to the rotation axis of the first sheave shaft 31 and the rotation axis of the hook shaft 16a. In this state, the attachment member 45 includes a part including the entire first through hole 45a from the middle shaft portion 31a of the first sheave shaft 31 toward the space between the first and second sheaves 15A and 15B. It is comprised so that it may protrude. In addition, the length of the protruding portion is configured such that the entire attachment member 45 can be accommodated in a space sandwiched between the first and second sheave covers 30A and 30B.

  In FIG. 2, the battery mounting member 46 includes an upper side portion 46a having an electrical connection portion with the battery 41 on the lower surface side, a lower side portion 46b having a shorter horizontal dimension than the upper side portion 46a, and left end portions thereof. And a left side portion 46c to be connected. The battery attachment member 46 is attached by welding the left end upper surface portion of the upper side portion 46 a to the right end lower surface portion of the attachment member 45 by welding or the like. The left side portion 46c is formed with a guide groove (not shown) for sliding the battery 41 that has passed through the lower side portion 46b from the lower side to the upper side and guiding it to the connection portion. In addition, the size of the battery mounting member 46 is configured such that the entire battery mounting member 46 fits in a space sandwiched between the first and second sheave covers 30A and 30B.

The electric motor 40 is composed of, for example, a small servo motor or the like within a range where necessary torque can be obtained. In the first embodiment, the electric motor 40 includes a rectangular parallelepiped main body portion and a motor shaft 40a protruding from one end in the longitudinal direction. The electric motor 40 includes a bolt or the like (not shown) on the lower surface of the mounting member 45 in a state where the motor shaft 40a is inserted into the first through hole 45a of the mounting member 45 from the lower surface side and a part of the shaft protrudes to the upper surface side. It is fixedly supported by. In the first embodiment, the center of gravity 40 g of the electric motor 40 is positioned below the first sheave shaft 31 while being fixedly supported by the mounting member 45. In addition, the entire electric motor 40 is configured to be accommodated in a space sandwiched between the first and second sheave covers 30A and 30B (see FIG. 2).
Therefore, for example, when existing ones are used as the first and second sheave covers 30A and 30B, they are matched to the size and shape of the first and second sheave covers 30A and 30B, the size of the inner space, etc. Then, an electric motor having a size and a shape that satisfies the above-described configuration is selected or manufactured from existing ones.

The battery 41 is a rechargeable battery (secondary battery) that supplies power to the electric motor 40 and the remote control device 42. The battery 41 is provided with an electrical connection between the positive electrode and the negative electrode on the upper surface. The battery 41 slides along the guide groove from the lower side to the upper side of the battery mounting member 46 and fits inside the battery mounting member 46. The battery 41 side connecting portion and the battery mounting member 46 side connecting portion And are attached in a connected state. Thus, the attached battery 41 is disposed at positions opposite to each other in plan view with the electric motor 40 and the first sheave shaft 31 as the center. In the first embodiment, the center of gravity 41 g of the battery 41 is configured to be positioned below the first sheave shaft 31 while being fixedly supported by the battery mounting member 46. Moreover, in 1st Embodiment, the electric power of the battery 41 is supplied to the electric motor 40 and the remote control apparatus 42 via the connection part by the side of the battery attachment member 46. FIG. In addition, the entire battery 41 is configured to be accommodated in the space inside the first and second sheave covers 30A and 30B (see FIG. 2).
Therefore, for example, when existing ones are used as the first and second sheave covers 30A and 30B, they are matched to the size and shape of the first and second sheave covers 30A and 30B, the size of the inner space, etc. Then, a battery having a size and shape satisfying the above configuration is selected or manufactured from existing ones.

The remote control device 42 receives a remote operation signal wirelessly transmitted from a hook remote controller 100 (described later), and drives and controls the electric motor 40 based on the received remote operation signal. In the first embodiment, the remote control device 42 is fixedly supported on the upper part of the battery mounting member 46. Therefore, similarly to the battery 41, the remote control device 42 is also disposed at a position opposite to the electric motor 40 in plan view across the first sheave shaft 31. The entire remote control device 42 is also configured to be accommodated in a space sandwiched between the first and second sheave covers 30A and 30B (see FIG. 2).
Accordingly, for example, when the existing remote control device 42 is used as the first and second sheave covers 30A and 30B, the size and shape of the first and second sheave covers 30A and 30B, The size and shape satisfying the above configuration are designed according to the size of the space.

The battery 41 and the remote control device 42 are covered with a waterproof cover 48 formed by molding a sheet metal.
Further, with the above configuration, the electric motor 40, the battery 41, and the remote control device 42 balance the mass of the electric motor 40 and the total mass of the battery 41 and the remote control device 42 around the first sheave shaft 31 ( It is arranged in a positional relationship.

The speed reducer 44 includes a first spur gear 44a and a second spur gear 44b having a larger diameter than the first spur gear 44a. The first spur gear 44a is fixedly supported on the upper portion of the motor shaft 40a so as to be rotatable in synchronization with the motor shaft 40a, and the second spur gear 44b is fixedly supported on the upper portion of the hook shaft 16a so as to be rotatable in synchronization with the hook shaft 16a. Yes.
The first spur gear 44a and the second spur gear 44b are partially meshed with each other. And if the motor shaft 40a rotates with the rotational driving force which the electric motor 40 generate | occur | produces, the 1st spur gear 44a will rotate synchronizing with this. When the first spur gear 44a rotates, the second spur gear 44b rotates at a rotational speed corresponding to a previously designed reduction ratio. When the second spur gear 44b rotates, the hook shaft 16a rotates in synchronization therewith.

Further, the speed reducer 44 is disposed in the space above the first sheave shaft 31 so that the entirety thereof is accommodated in the space sandwiched between the first and second sheave covers 30A and 30B. It is configured (see FIG. 2).
On the other hand, the first and second self-produced generators 47A and 47B are composed of generators having the same configuration, and, for example, are self-produced by receiving an external force such as vibration. The power self-generated by the first and second self-generated generators 47 </ b> A and 47 </ b> B is used as charging power for the battery 41. In the first embodiment, linear generators are employed as the first and second self-generated generators 47A and 47B.
The first self-generated generator 47A is attached to the upper trapezoidal left-side inclined portion of the first and second sheave covers 30A and 30B so as to be stretched in the front-rear direction in a posture orthogonal to the inclined portion. . Further, the second self-generated generator 47B is attached to the surface of the upper trapezoidal portion of the second sheave cover 30B in a posture orthogonal to the first sheave shaft 31 in the front-rear direction.

  The first hook device 6 </ b> A is suspended from the boom 5 by the wire rope 14 wound around the first sheave 15 </ b> A and the second sheave 15 </ b> B, and acts on the hook 16 via the first sheave shaft 31. Under load. No load such as a suspended load acts on the first and second sheave covers 30A and 30B. The first and second sheave covers 30A and 30B are rotatable with respect to the first sheave shaft 31, but are normally (at no load) in the positions shown in FIGS. This is because the center of gravity of the first and second sheave covers 30A and 30B is below the first sheave shaft 31. The hook 16 can swing around its axis when the first sheave shaft 31 rotates, but normally (when no load is applied), the hook 16 is at the position shown in FIGS. This is because the electric motor 40 and the battery 41 constituting the rotation drive mechanism are arranged at positions opposite to each other in plan view with the first sheave shaft 31 as the center. In addition, the center of gravity 40 g of the electric motor 40 and the center of gravity 41 g of the mass including the battery 41 and the remote control device 42 (hereinafter referred to as “the center of gravity 41 g of the batteries 41”) are below the first sheave shaft 31. Because there is. Furthermore, in the first embodiment, the arrangement configuration of the electric motor 40, the battery 41, and the remote control device 42 is the same as the arrangement of the mass of the electric motor 40, the battery 41, and the remote control device 42 (hereinafter referred to as “batteries 41”). The arrangement is considered in consideration of the difference between the mass and the mass. Specifically, the distance between the center of gravity 40g and the first sheave shaft 31 is added to the mass of the electric motor 40 in consideration of the mass of the mounting member 45 on the electric motor 40 side in the plan view. The arrangement is such that the value obtained by multiplying the mass of the battery 41 by taking into account the mass of the attachment members 45 and 46 on the battery 41 side and the value obtained by multiplying the distance between the center of gravity 41g and the first sheave shaft 31 are equal. . That is, with respect to the first sheave shaft 31, the mass of the electric motor 40 including the mass of the mounting member 45 on the electric motor 40 side and the mass of the batteries 41 including the mass of the mounting members 45 and 46 on the battery 41 side are included. Are arranged in a balanced state.

The first hook device 6 </ b> A is wound and unwound by the wire rope 14 by operation of a winch (not shown) on the base end side of the boom 5. The wire rope 14 enters the first boom-side sheave 10 </ b> A at the tip of the boom 5 through a wire guide 50 attached to the lower surface of the boom 5. Then, it passes through the first sheave 15A of the first hook device 6A and comes out from the front side of the second boom side sheave 10B at the tip of the boom 5 from the front side. Further, it passes through the second sheave 15B of the first hook device 6A, passes from the back surface of the guide sheave 11 provided at the tip of the boom 5 to the front side, and is fixed to the socket 51 for fixing the end of the wire rope 14 with the cotter 52. It is worn.
The electric motor 40, the battery 41, the remote control device 42, and the speed reducer 44 described above constitute a rotation drive mechanism of the first hook device 6A.

Next, a specific configuration of the hook remote controller 100 and the remote control device 42 and a connection configuration of each component of the rotation drive mechanism will be described. The hook remote controller 100 is mounted on one or both of a crane remote controller (not shown) and a crane main body control unit.
As shown in FIG. 5, the hook remote controller 100 includes a hook rotation switch 101 and a transmitter 102.
The hook rotation switch 101 generates rotation instruction information for rotating the hook 16 in the direction corresponding to the operation content by the amount of rotation corresponding to the operation content according to the operator's switch operation, and the generated rotation instruction information. Is output to the transmitter 102.

The transmitter 102 generates a remote operation signal in which the rotation instruction information input from the hook rotation switch 101 is placed on a carrier wave in a preset frequency band. The generated remote operation signal is wirelessly transmitted.
On the other hand, the remote control device 42 includes a receiver 42a and a control device 42b.
The receiver 42a receives the remote operation signal wirelessly transmitted from the hook remote controller 100, demodulates the received remote operation signal, and extracts rotation instruction information. Then, the extracted rotation instruction information is output to the control device 42b.
Based on the rotation instruction information input from the receiver 42a, the control device 42b generates a motor drive signal for rotating the hook 16 in the rotation direction corresponding to the instruction information by a rotation amount corresponding to the instruction information. Then, the generated motor drive signal is output to the electric motor 40.

The control device 42b of the remote control device 42 is electrically connected to the electric motor 40 via an electric cable (not shown). In addition, the battery 41 is electrically connected to the receiver 42a, the control device 42b, and the electric motor 40 via an electric cable (not shown). Further, the first self-generated generator 47A and the second self-generated generator 47B are electrically connected to the battery 41 via an electric cable (not shown).
On the other hand, the motor shaft 40 a of the electric motor 40 is mechanically connected to the hook shaft 16 a via the speed reducer 44.

With the above configuration, when electric power is supplied from the battery 41 to the electric motor 40 and the remote control device 42, the electric motor 40 and the remote control device 42 become operable. In this state, when the operator operates the hook rotation switch 101 of the hook remote controller 100, a remote operation signal is wirelessly transmitted via the transmitter 102. The remote control signal transmitted wirelessly is received by the receiver 42a of the remote control device 42. The receiver 42a extracts rotation instruction information from the received remote operation signal and outputs the extracted rotation instruction information to the control device 42b. The control device 42b generates a motor drive signal corresponding to the rotation instruction information based on the input rotation instruction information, and outputs the generated motor drive signal to the electric motor 40.
As a result, the electric motor 40 is rotationally driven, and this rotational driving force is transmitted to the hook shaft 16a via the speed reducer 44, and the hook 16 rotates about the hook shaft 16a.

Next, a specific configuration of the first and second self-generated generators 47A and 47B will be described.
Hereinafter, the first and second self-generated generators 47A and 47B may be referred to as “self-generated generator 47” when it is not necessary to distinguish them.
As shown in FIG. 6, the self-generated generator 47 includes a substantially cylindrical case 47a, and the space inside the case 47a is divided into two spaces S1 and S2 by a partition 47b. On the space S1 side of the case 47a, a coil 47c having a configuration in which a winding is wound in the circumferential direction along the inner circumferential surface is fixedly disposed in a recessed portion formed on the inner wall of the case 47a. Has been. In addition, a cylindrical magnet 47d having an S pole and an N pole arranged in the longitudinal direction in the space S1 is provided so as to be able to advance and retreat in the space S1 through the inside of the coil 47c. Further, a spring 47e that generates an elastic force in a direction perpendicular to these surfaces (that is, the advancing / retreating direction of the magnet 47d) is formed on the space S1 side surface of the partition portion 47b and the inner end surface of the case 47a facing this surface. Is provided. When the magnet 47d collides with the spring 47e, the spring 47e contracts and a restoring force is applied to the magnet 47d in the direction opposite to that during the collision. This configuration facilitates the reciprocating motion of the magnet 47d in the forward / backward direction.

As the magnet 47d reciprocates in the space S1 through the inside of the coil 47c, an induced electromotive force (AC power) due to electromagnetic induction is generated.
The spring 47e also has a role as a cushion that prevents the force with which the magnet 47d collides from being transmitted directly to the case 47a and the partitioning portion 47b, and also has a role to prevent damage.
On the other hand, the partition 47b is provided with a through hole 47g for passing two wires 47f extending from the winding start end and the winding end end of the coil 47c to the space S2 side. In addition, a rectifier circuit 47h and a charging circuit 47i are disposed in the space S2.

The two wires 47f are connected to the plus terminal and the minus terminal of the rectifier circuit 47h through the through hole 47g.
The rectifier circuit 47h includes a full-wave rectifier circuit (not shown), and the AC power input via the wiring 47f is full-wave rectified in the full-wave rectifier circuit and converted to DC power. Then, this DC power is output to the charging circuit 47i.
The charging circuit 47i includes a smoothing capacitor (not shown) and smoothes input DC power. Then, the smoothed DC power is supplied to the battery 41 via the electric cable 47j.
Note that the charging circuit 47i and the rectifying circuit 47h are shown as structures incorporated together in the first self-generated generator 47A and the second self-generated generator 47B, but not limited to this structure, the control device 42b It is good also as a structure built in.
Moreover, the crane 1A according to the first embodiment has a function of storing the first hook device 6A when not working or moving. Furthermore, the crane 1A is a vehicle-mounted crane.

  Specifically, when the first hook device 6A is stored from the state of FIG. 1, the winch is operated to wind up the first hook device 6A. The wound first hook device 6 </ b> A is raised to the state shown in FIG. 7A, and the upper end guide roller 38 comes into contact with the guide surface of the guide plate 27. When the first hook device 6A is further wound up, the guide roller 38 rolls along the guide surface, and the first and second boom-side sheaves 10A and 10B at the tip of the boom and the first hook device 6A first. The first hook device 6A moves in the direction in which the distance between the second sheaves 15A and 15B decreases. As shown in FIG. 7B, the distance between the first and second boom-side sheaves 10A and 10B at the boom tip and the first and second sheaves 15A and 15B of the first hook device 6A is the smallest. The guide roller 38 is inserted into the concave portion 24 and stored. Since the boom-side sheave shaft 25 at the tip of the boom 5 and the first sheave shaft 31 of the first hook device 6A are orthogonal to each other, the height when retracted is the first and second sheaves of the first hook device 6A. It is not affected by the diameters of 15A and 15B, and is determined by the distance between the first sheave 15A and the second sheave 15B.

In the state where the guide roller 38 is in contact with the guide surface of the guide plate 27 as described above, the first sheave is transmitted from the wire rope 14 through the first and second sheaves 15A and 15B of the first hook device 6A. A hoisting force acts on the shaft 31. In addition, a reaction force against the hoisting force acts on the first and second sheave covers 30A and 30B via the guide roller 38. As a result, the fitting surfaces of the first and second sheave covers 30A and 30B and the first sheave shaft 31 are pressed against each other to prevent the first sheave shaft 31 from rotating, and the hook 16 swings (rotates). It is fixed without.
In this fixed state, as shown in FIG. 7B, the longitudinal direction (magnet advance / retreat direction) of the first self-generated generator 47A is oriented in the vertical direction (vertical direction of the crane). On the other hand, as shown in FIG. 8, the second self-generated generator 47 </ b> B has a posture in which the longitudinal direction thereof is directed in a direction perpendicular to the longitudinal direction of the boom 5 (the left-right direction of the crane).

The crane 1A according to the first embodiment is mounted on a truck 13 having a cargo bed, as shown in FIG. The boom 5 of the crane 1A extends straight forward through the upper part of the driver's seat of the truck 13 in the most contracted state, and the first hook device 6A is fixed at the tip of the boom 5 in this state (hereinafter referred to as “the first hook device 6A”). The state in which the hook device is fixed to the tip of the boom 5 is referred to as a “hook storage state”). The truck 13 travels toward the work site in the hook retracted state.
In the hook retracted state, for example, when the truck 13 receives vertical vibration during traveling, the magnet 47d of the first self-generated generator 47A receives a force in the direction of relative movement with the coil 47c, and the space of the case 47a. It moves forward and backward in the vertical direction while passing through the inside of the coil 47c in S1. Thereby, in the first self-generated generator 47A, an induced electromotive force is generated by electromagnetic induction to generate power. On the other hand, when the track 13 receives vibration in the left-right direction, the magnet 47d of the second self-generated generator 47B receives a force in the direction of relative movement with the coil 47c, and moves the space S1 of the case 47a inside the coil 47c. Move forwards and backwards while passing. As a result, the second self-generated generator 47B generates an electromotive force induced by electromagnetic induction. The generated power is charged in the battery 41.

Thus, the vibration energy is converted into electric energy and the battery 41 is charged in the first and second self-generated generators 47A and 47B until the truck 13 arrives at the work site. Then, at the work site, electric power is supplied to the electric system components of the rotation drive mechanism by the battery 41 charged during the movement. In this state, when the operator operates the hook remote controller 100 and remotely operates the electric motor 40, the hook 16 is rotationally driven. Thereby, it becomes possible to change the attitude | position of a suspended load by remote operation.
Here, the first sheave shaft 31 corresponds to a sheave shaft, the first and second sheaves 15A and 15B correspond to a plurality of sheaves, and the first and second sheave covers 30A and 30B correspond to two sheave covers. To do.
The speed reducer 44 corresponds to the transmission member, the attachment member 45 corresponds to the attachment member, the first through hole 45a corresponds to the insertion portion, and the motor shaft 40a corresponds to the motor rotation shaft.

(Effect of 1st Embodiment)
(1) The first hook device 6 </ b> A according to the first embodiment is a first hook on which the wire rope 14 is rotatably attached to one end side and the other end side in the axial direction of the first sheave shaft 31. And second sheaves 15A and 15B. In addition, the first and second sheave covers 30A and 30B that are rotatably fitted to one end and the other end in the axial direction of the first sheave shaft 31, and an axis orthogonal to the rotation axis of the first sheave shaft 31 And a hook 16 provided rotatably. Furthermore, the hook 16 includes a rotation driving mechanism that rotates around the axis of the hook shaft 16a in response to reception of the remote operation signal. The rotation drive mechanism includes an electric motor 40, a remote operation signal receiver 42a, a control device 42b for controlling the drive of the electric motor 40 based on the remote operation signal received by the receiver 42a, the electric motor 40, the receiver 42a, and The battery 41 which supplies electric power to the control apparatus 42b, and the reduction gear 44 which transmits the rotational driving force of the electric motor 40 to the hook 16 are provided. The entire rotational drive mechanism is accommodated in a space sandwiched between the first and second sheave covers 30A and 30B.

  If it is this structure, the whole rotation drive mechanism will be accommodated in the inner space pinched | interposed by 1st and 2nd sheave covers 30A and 30B, and a rotation drive mechanism will be 1st and 2nd sheave covers 30A and 30B. Do not protrude outward from As a result, when the first hook device 6A collides with a suspended load or the ground, the first and second sheave covers 30A and 30B can protect the rotational drive mechanism from the collision, thereby improving the collision resistance of the rotational drive mechanism. It becomes possible to improve. Moreover, since it becomes possible to make a protection guard unnecessary, the cost can be reduced as compared with the conventional case.

(2) In the first hook device 6A according to the first embodiment, the hook 16 further rotates around the axis orthogonal to the rotation axis of the first sheave shaft 31 at the center in the longitudinal direction of the first sheave shaft 31. It is attached freely. In addition, the rotation axis of the first sheave shaft 31 and the rotation of the hook 16 in a space fixedly supported on the upper portion of the middle shaft portion 31a of the first sheave shaft 31 and sandwiched between the first and second sheave covers 30A and 30B. An attachment member 45 is provided that extends in a direction orthogonal to the axis (left and right direction in the first embodiment). Furthermore, the electric motor 40 is fixedly supported by the mounting member 45 so that the main body portion of the electric motor 40 is positioned below the extended portion of the mounting member 45 (the left portion in the first embodiment).
With this configuration, compared to the conventional configuration in which the electric motor is attached to the lateral side of the first sheave shaft 31 via a mounting member such as a bracket, the electric motor 40 is extremely located on the middle shaft portion 31a of the first sheave shaft 31. Since it arrange | positions so that it may adjoin, it becomes possible to improve the accommodating property of the left-right direction of the electric motor in the space pinched | interposed into 1st and 2nd sheave covers 30A and 30B. That is, since there is no protruding portion of the mounting member in the left-right direction, it is possible to secure a space in the left-right direction by that amount.

(3) In the first hook device 6A according to the first embodiment, the attachment member 45 further has a first through hole 45a through which the motor rotating shaft 40a of the electric motor 40 can be inserted. The electric motor 40 is fixedly supported so that a part of the motor rotation shaft 40a protrudes above the attachment member 45 through the first through hole 45a. Further, the hook 16 is provided so as to penetrate the middle shaft portion 31 a of the first sheave shaft 31 and a part thereof protrudes above the middle shaft portion 31 a of the first sheave shaft 31. The speed reducer 44 is provided in the space inside the first and second sheave covers 30A and 30B and above the middle shaft portion 31a, and from the motor rotation shaft 40a above the mounting member 45 to the middle shaft portion 31a. A rotational driving force is transmitted to the upper hook shaft 16a.
If it is this structure, the reduction gear 44 which is a rotational drive force transmission member is provided in the space between the first and second sheave covers 30A and 30B and using the space above the middle shaft portion 31a. It becomes possible. This makes it possible to make effective use of the empty space, making it possible to reduce the size of the hook device, divert existing parts, and the like.

(4) In the first hook device 6A according to the first embodiment, the electric motor 40, the battery 41, and the remote control device 42 are opposite to each other in plan view with the first sheave shaft 31 as the center. Arranged in a positional relationship. In addition, the center of gravity 40 g of the electric motor 40 and the center of gravity 41 g of the batteries 41 are arranged so as to be positioned below the first sheave shaft 31. Furthermore, considering the difference between the mass of the electric motor 40 and the mass of the batteries 41, the mass of the electric motor 40 in consideration of the mass of the mounting member 45 on the electric motor 40 side in plan view with the first sheave shaft 31 as the center. The value of the first sheave shaft 31 and the center of gravity 41g is added to the mass of the battery 41 and the value obtained by multiplying the distance between the first sheave shaft 31 and the center of gravity 40g by the weight of the attachment members 45 and 46 on the battery 41 side. It arrange | positions so that the value which multiplied the distance between may become equal.
With this configuration, it is possible to achieve a mass balance in the rotation of the hook 16 around the first sheave shaft 31, and it is possible to prevent the hook 16 from tilting when there is no suspended load (no load state). It becomes possible.

(5) In the first hook device 6A according to the first embodiment, the battery 41 is further composed of a rechargeable battery. Furthermore, the first self-generated generator 47A and the second self-generated generator 47B that generate electric power by converting vibration energy into electric energy are provided. And it is comprised so that the battery 41 may be charged using the electric power generated by 47 A of 1st self-generated generators, and the 2nd self-generated generator 47B.
If it is this structure, it will become possible to generate electric power by the vibration which generate | occur | produces, for example during the movement of the crane carrying the 1st hook apparatus 6A, and it will become possible to charge the battery 41 during the movement to a work site. As a result, it is possible to reduce the occurrence of troublesome work such as replacing the battery during the work.

(6) The first hook device 6A according to the first embodiment is further mounted on a crane 1A having a function of storing the hook device. The first self-generated generator 47A and the second self-generated generator 47B are configured to include a linear generator that generates power by electromagnetic induction by relative movement between the coil 47c and the magnet 47d. The attitude of the first self-generated generator 47A in which the relative movement direction of the coil 47c and the magnet 47d is the vertical direction (vertical direction in the first embodiment) when the first hook device 6A is in the hook retracted state. Is provided. The second self-generated generator 47B is configured such that when the first hook device 6A is in the hook retracted state, the relative movement direction of the coil 47c and the magnet 47d is the horizontal direction (the left-right direction in the first embodiment). Is provided.
With this configuration, the first hook device 6A is mounted on, for example, a vehicle-mounted crane, thereby efficiently generating power by the vertical vibration and the horizontal vibration generated when the crane moves. It becomes possible. As a result, the battery 41 can be efficiently charged while the crane is moving.

(Second Embodiment)
The second hook device 6B according to the second embodiment has a biaxial configuration of a sheave shaft that supports the sheave and a hook support shaft that supports the hook, as compared with the first hook device 6A of the first embodiment. And the point that a rotational drive mechanism is provided between the sheave shaft and the hook.
Specifically, as shown in FIGS. 10 to 12, the second hook device 6B includes a hook 18, a third sheave 17A, a fourth sheave 17B, a third sheave cover 60A, and a fourth sheave. A cover 60B, a hook support shaft 61, and a second sheave shaft 63 are provided.

The second hook device 6B is suspended by a wire rope 82 from the tip end portion of the boom 8 provided in the crane 1B in a direction different from the first hook device 6A of the first embodiment by 90 degrees around a vertical axis. Has been lowered. That is, the second hook device 6B is suspended in a posture in which the boom-side sheave shaft 83 that is the rotation shaft of the boom-side sheave 81 and the second sheave shaft 63 are in parallel.
The third sheave cover 60A is provided on the front (front) side in FIG. 10, and the fourth sheave cover 60B is provided on the back (rear) side facing the third sheave cover 60A in FIG. It has been. Further, the third and fourth sheave covers 60A and 60B have a rectangular shape with a trapezoidal shape at the top and a trapezoidal base at the top, and a bottom at the bottom and a vertex at the bottom as the bottom of the rectangle. It is formed in the shape of an isosceles triangle that is inverted vertically.

The hook support shaft 61 is composed of a trunnion-type shaft, and, like the first sheave shaft 31 of the first embodiment, a rectangular parallelepiped-shaped middle shaft portion 61a and the longitudinal end surfaces of the middle shaft portion 61a. It has a cylindrical convex shaft portion 61b protruding from the center, and a circular through hole 61c penetrating vertically through the center portion of the middle shaft portion 61a. The hook support shaft 61 is swingably attached by fitting the convex shaft portion 61b into the circular through hole 60h2 provided at the lower ends of the third sheave cover 60A and the fourth sheave cover 60B. ing.
The second sheave shaft 63 is configured such that both end portions of the second sheave shaft 63 are fitted into circular through holes 60h1 provided substantially at the respective centers of the third sheave cover 60A and the fourth sheave cover 60B. Thus, it is rotatably provided between the third and fourth sheave covers 60A and 60B.

The third sheave 17A is pivotally attached to the third sheave cover 60A side of the hook support shaft 61 via a radial bearing 35, and the fourth sheave 17B is radial to the fourth sheave cover 60B side of the second sheave shaft 63. It is pivotally attached via a bearing 35.
The hook 18 is inserted into the through-hole 61c provided in the middle shaft portion 61a of the hook support shaft 61 from the lower side to the upper side, and the hook 18 is supported on the upper portion of the middle shaft portion 61a via the thrust bearing 39. The shaft 61 is attached so as to be rotatable about an axis orthogonal to the rotation axis of the shaft 61.
The second hook device 6B further includes an electric motor 70, a battery 71, a remote control device 72, a speed reducer 74, a mounting member 75, a third self-produced generator 47C, and a fourth self-produced device. A generator 47D and a fifth self-generated generator 47E are provided.

The attachment member 75 is formed in a flat plate shape and includes a circular third through hole 75a for the motor shaft 70a on the back surface (rear) side from the center in the longitudinal direction. The third through hole 75a has a diameter larger than the diameter of the motor shaft 70a.
The attachment member 75 is provided in the space above the hook shaft 18a and below the second sheave shaft 63, and the longitudinal direction of the attachment member 75 is the swing axis of the hook support shaft 61 and the rotation axis of the hook shaft 18a. It is provided in an orthogonal direction. The attachment member 75 is configured to have a length that fits in a space sandwiched between the third and fourth sheave covers 60A and 60B.

  The electric motor 70 is composed of, for example, a small servo motor or the like, and has the same shape as the electric motor 40 of the first embodiment. The electric motor 70 is fixedly supported on the upper surface of the mounting member 75 with the motor shaft 70a inserted through the third through hole 75a of the mounting member 75 from the upper surface side and a part of the shaft protruding to the lower surface side. . Accordingly, the electric motor 70 is disposed on the left side of the center of the hook support shaft 61 in plan view. In addition, the entire electric motor 70 is configured to be accommodated in a space sandwiched between the third and fourth sheave covers 60A and 60B.

Accordingly, similarly to the first embodiment, the electric motor having a size and a shape satisfying the above configuration according to the size and shape of the third and fourth sheave covers 60A and 60B to be used, the size of the inner space, and the like. Choose or make a motor from existing ones.
The battery 71 is a rechargeable battery having the same configuration as the battery 41 of the first embodiment, and supplies power to the electric motor 70 and the remote control device 72.
The remote control device 72 has the same configuration as the remote control device 42 of the first embodiment, and includes a receiver (not shown) and a control device (not shown).

  In the second embodiment, the battery 71 and the remote control device 72 are fixedly supported at a position on the right side of the center of the hook support shaft 61 in a plan view above the attachment member 75. Specifically, a battery mounting member having the same configuration as that of the battery mounting member 46 of the first embodiment (however, an upside down posture) is joined and attached to the battery mounting position above the mounting member 75 by welding or the like. (Not shown). The battery 71 is fixedly supported by sliding the battery mounting member from the upper side to the lower side to connect the connecting portions thereof, and the remote control device 72 is fixedly supported adjacent to the boom tip side of the battery 71. ing. Although not shown, the battery 71 and the remote control device 72 are covered with a waterproof cover. In addition, the entire battery 71 and the remote control device 72 are configured to be accommodated in a space sandwiched between the third and fourth sheave covers 60A and 60B.

Accordingly, in the same manner as in the first embodiment, a battery having a size and shape that satisfies the above-described configuration according to the size and shape of the third and fourth sheave covers 60A and 60B to be used, the size of the inner space, and the like 71 is selected or made from existing ones. The remote control device 72 is also designed to have a size and shape that satisfies the above configuration.
Note that the hook 18 is always vertically downward due to its mass. This is a hook support shaft in which the hook 18 is made of steel and the mass thereof is obtained by adding a mounting member 75 and a battery mounting member to a rotary drive mechanism including an electric motor 70, a battery 71, a remote control device 72, and a speed reducer 74. This is because it is much heavier than the structure above 61.

The speed reducer 74 includes a third spur gear 74a and a fourth spur gear 74b having a larger diameter than the third spur gear 74a. The third spur gear 74a is fixedly supported at the lower part of the motor shaft 70a so as to be able to rotate synchronously with the motor shaft 70a, and the fourth spur gear 74b is fixedly supported at the upper part of the hook shaft 18a so as to be rotatable synchronously with the hook shaft 18a. Yes.
The third spur gear 74a and the fourth spur gear 74b are partially meshed with each other. When the motor shaft 70a is rotated by the rotational driving force generated by the electric motor 70, the third spur gear 74a is rotated in synchronism with this. When the third spur gear 74a rotates, the fourth spur gear 74b rotates at a rotational speed corresponding to a previously designed reduction ratio. When the fourth spur gear 74b rotates, the hook shaft 18a rotates in synchronization with this, and the entire hook 18 rotates.

Further, the speed reducer 74 is disposed in a space below the attachment member 75, and the entirety thereof is configured to be accommodated in a space sandwiched between the third and fourth sheave covers 60A and 60B. ing.
The third self-generated generator 47C is attached to the upper trapezoidal rear side inclined portion of the third and fourth sheave covers 60A and 60B, extending in the left-right direction in a posture orthogonal to the inclined portion. Yes. The fourth self-generated generator 47D is attached to the upper surface of the third sheave cover 60A in a posture orthogonal to the second sheave shaft 63 in the front-rear direction. Further, the fifth self-generating generator 47E is attached to the upper surface of the middle part of the fourth sheave cover 60A in a posture orthogonal to the second sheave shaft 63 in the vertical direction.

The electric motor 70, the battery 71, the remote control device 72, and the speed reducer 74 described above constitute a rotation drive mechanism of the second hook device 6B.
Further, the crane 1B according to the second embodiment has a function of storing the second hook device 6B when not working or moving. Furthermore, the crane 1B is a vehicle-mounted crane.
Specifically, when storing the second hook device 6B from the state of FIG. 10A, the winch is operated to wind up the second hook device 6B. The second hook device 6B that has been wound up rises to the state shown in FIG. 10B, and the upper end portion comes into contact with the lower end portion of the boom 8 tip. As a result, the storage state is established.

When the upper end is in contact with the lower end as described above, the hoisting force is applied from the wire rope 82 to the second sheave shaft 63 via the third and fourth sheaves 17A and 17B of the second hook device 6B. work. In addition, a reaction force against the hoisting force acts on the third and fourth sheave covers 60A and 60B via the upper end portion. Accordingly, the fitting surfaces of the third and fourth sheave covers 60A and 60B and the second sheave shaft 63 are pressed against each other, and the rotation of the second sheave shaft 63 is prevented.
With the above configuration, when electric power is supplied from the battery 71 to the electric motor 70 and the remote control device 72, the electric motor 70 and the remote control device 72 are in an operable state. In this state, when the operator operates the hook rotation switch 101 of the hook remote controller 100, a remote operation signal is wirelessly transmitted via the transmitter 102. The remote operation signal transmitted wirelessly is received by the receiver of the remote control device 72. The receiver extracts rotation instruction information from the received remote operation signal, and outputs the extracted rotation instruction information to the control device. The control device generates a motor drive signal corresponding to the rotation instruction information based on the input rotation instruction information, and outputs the generated motor drive signal to the electric motor 70.

Further, when the second hook device 6B is in the hook retracted state, the longitudinal direction of the third self-generated generator 47C (magnet advance / retreat direction) is oriented in the left-right direction of the crane 1B. On the other hand, the fourth self-generated generator 47D has a posture in which the longitudinal direction thereof faces the front-rear direction of the crane 1B. In addition, the fifth self-generated generator 47E has a posture in which the longitudinal direction thereof faces the vertical direction of the crane 1B.
A crane 1B according to the second embodiment is a super large crane, and is mounted on a large truck 19 (for example, a 20 [t] truck) having a loading platform, as shown in FIG. The boom 8 of the crane 1B extends straight rearward over the upper part of the loading platform of the truck 19 in the most contracted state, and the second hook device 6B is in the retracted state at the tip of the boom 8 in this state. . The truck 19 travels toward the work site in this hook retracted state.

Therefore, the third self-generated generator 47C generates power when the truck 19 receives left-right vibration during traveling, and the fourth self-generated generator 47D generates power by receiving front-back vibration. The fifth self-generated generator 47E generates power by receiving the vertical vibration. The generated power is charged in the battery 71.
Here, the second sheave shaft 63 corresponds to the sheave shaft, the third and fourth sheaves 17A and 17B correspond to a plurality of sheaves, and the third and fourth sheave covers 60A and 60B correspond to two sheave covers. The speed reducer 74 corresponds to the transmission member.

(Effect of 2nd Embodiment)
(1) In the second hook device 6B according to the second embodiment, a third wire rope 82, which is rotatably attached to one end side and the other end side in the axial direction of the second sheave shaft 63, is wound around the third hook device 6B. And fourth sheaves 17A and 17B. In addition, third and fourth sheave covers 60A and 60B are rotatably fitted to one end and the other end of the second sheave shaft 63 in the axial direction. Further, below the second sheave shaft 63, one end and the other end in the axial direction are rotatably fitted to the lower ends of the third and fourth sheave covers 60A and 60B, and the hook support shaft 61 And a hook 18 that is rotatably provided about an axis orthogonal to the swing axis. Furthermore, a rotation drive mechanism that rotates the hook 18 around the axis of the hook shaft 18a in response to reception of the remote operation signal is provided. The rotation drive mechanism includes an electric motor 70, a remote control device 72 having a remote operation signal receiver and a control device for driving and controlling the electric motor 70 based on the remote operation signal received by the receiver, the electric motor 70 and the remote control device. A battery 71 that supplies electric power to the control device 72 and a speed reducer 74 that transmits the rotational driving force of the electric motor 70 to the hook 18 are provided. The entire rotational drive mechanism is accommodated in a space sandwiched between the third and fourth sheave covers 60A and 60B.

With this configuration, the rotation drive mechanism is accommodated in the space inside the third and fourth sheave covers 60A and 60B, and the rotation drive mechanism does not protrude outward from the third and fourth sheave covers 60A and 60B. . As a result, when the second hook device 6B collides with a suspended load or the ground, the third and fourth sheave covers 60A and 60B can protect the rotational drive mechanism from the collision, thereby improving the collision resistance of the rotational drive mechanism. It becomes possible to improve. Moreover, since it becomes possible to make a protection guard unnecessary, it becomes possible to reduce the cost.
In other words, the biaxial hook device including the second sheave shaft 63 and the hook support shaft 61 also has the same operation as the uniaxial hook device in which the sheave shaft and the hook support shaft of the first embodiment are used in common. And effects can be obtained.
In addition, by using the biaxial type, it is possible to ensure a relatively large space between the second sheave shaft 63 and the hook support shaft 61, and each component of the rotary drive mechanism as compared with the uniaxial type. It is possible to increase the degree of freedom of the arrangement position, size, shape, and the like.

(2) In the second hook device 6B according to the second embodiment, the electric motor 70, the battery 71, and the remote control device 72 are further arranged in a positional relationship in which the second sheave shaft 63 is the opposite side. Has been.
With this configuration, it is possible to balance the mass of the hook 18 around the hook support shaft 61, and it is possible to prevent the hook 18 from tilting when there is no suspended load (no load state). It becomes.

(3) In the second hook device 6B according to the second embodiment, the fifth self-generated generator 47E further includes the coil 47c and the magnet 47d when the second hook device 6B is in the hook retracted state. The relative movement direction is a vertical direction (vertical direction in the second embodiment). In the third and fourth self-generated generators 47C and 47D, when the second hook device 6B is in the hook retracted state, the relative movement direction of the coil 47c and the magnet 47d is the horizontal direction (the left and right direction in the second embodiment). And the back-and-forth direction).
With this configuration, by mounting the second hook device 6B on, for example, a vehicle-mounted crane, the vertical hooking vibration generated when the crane moves, the horizontal vibration, and the vibration in the front-rear direction can be efficiently used. Power generation can be performed. As a result, the battery 71 can be efficiently charged while the crane is moving.

(Modification)
In the first embodiment, the configuration in which the first hook device 6A is applied to the vehicle-mounted crane 1A has been described as an example. However, the configuration is not limited thereto. For example, as shown in FIG. 14, the first hook device 6A may be mounted on a self-propelled crawler crane 1C having a hook storage function. This crawler crane 1C is provided with a crane device having a boom 5 and a winch 10, an outrigger device, and a driver's seat 4 on a body (vehicle body). A crawler device 7 is provided at the lower part of the machine body so that the crawler device 7 can travel. Even if it is set as this structure, the effect | action and effect similar to the crane 1A mounted in the truck 13 are acquired. Moreover, it is good also as a structure applied to not a crawler type but a wheel type self-propelled crane.

Moreover, in each said embodiment, although the 1st-5th self-generated generator 47A-47E was made into the linear generator of a structure which a magnet advances / retreats through the inner side of a coil, it is not restricted to this structure. For example, the winding coil may be passed through the inside of a cylindrical magnet, and another configuration such as a linear generator having a configuration in which the magnet and the coil move relative to each other may be used.
Moreover, in each said embodiment, although it was set as the structure provided in the attitude | position corresponding to the shaking of the up-down direction of a crane carrying vehicle, the shaking of a front-back direction, and the shaking of a left-right direction, it is not restricted to this structure. For example, it is good also as a structure which provides a self-generated generator only with respect to the shaking of any one direction among these directions. Further, in the first embodiment, three or more self-generated generators may be provided, and in the second embodiment, four or more self-generated generators may be provided to correspond to other swing directions of the vehicle. . For example, it is good also as a structure which provides the self-generated generator corresponding to the shaking of each direction of the vehicle received by rolling, yawing, and pitching at the time of driving | running | working.

Moreover, in each said embodiment, although the transmission member which transmits the rotational driving force of a motor to a hook was comprised from the reduction gear which combined two spur gears, it is not restricted to this structure. For example, you may comprise from other speed reducers, such as a worm gear, a planetary gear, a bevel gear, a chain (sprocket), a speed reducer using a fluid coupling, and a belt drive type speed reducer.
Further, in each of the above embodiments, an example in which an appropriate size or shape is selected from an existing motor or an existing battery, or an appropriate size or shape is manufactured according to an existing sheave cover is taken as an example. Although mentioned, it is not restricted to this structure. For example, when it is necessary to mount a large motor or a large battery and the existing sheave cover cannot cope, a configuration corresponding to the sheave cover may be adopted.

  For example, as shown in FIG. 15A, a large motor 40L or a large battery 41L that protrudes outward from the space sandwiched between the first and second sheave covers 30A and 30B of the first hook device 6A is provided. Assume that it is installed. In addition, the broken line part in Fig.15 (a) becomes the outer peripheral part of the lower side of the 2nd sheave cover 30B. In this case, a large sheave cover 90B configured to be accommodated in a space sandwiched between two sheave covers in a state where there is at least a suspended load is newly provided. It is good also as a structure produced and employ | adopted. Note that the shape of the sheave cover 90B illustrated in FIG. 15A is an example, and other shapes may be employed. Further, the sheave cover 90B shown in FIG. 15A serves as a back side sheave cover, but the front side sheave cover (not shown) has the same configuration.

  On the other hand, as shown in FIG. 15B, for example, an extension option 91B may be attached to the existing second sheave cover 30B. That is, the expansion option 91B formed in a shape for expanding the existing sheave cover so as to cover the protruding portion is attached to the second sheave cover 30B. Note that the shape of the extension option 91B shown in FIG. 15B is an example, and other shapes may be used. Further, the extension option 91B shown in FIG. 15B is attached to the second sheave cover on the back side, but the same is applied to the one attached to the sheave cover (not shown) on the front side. In this way, the entire rotary drive mechanism including the protruding portion is accommodated in a space sandwiched between two sheave covers expanded with optional parts.

  Further, in each of the above embodiments, the self-generated generator is provided outside the sheave cover. However, the present invention is not limited to this configuration. It is good also as a structure provided inside a cover.

DESCRIPTION OF SYMBOLS 1A Vehicle-mounted crane 1B Crawler crane 5 Boom 6A First hook device 6B Second hook device 7 Crawler device 10 Winch 14 Wire rope 15A, 15B First, second sheave 16, 18 Hook 16a, 18a Hook shaft 17A, 17B 3rd, 4th sheave 30A, 30B 1st, 2nd sheave cover 31, 63 1st, 2nd sheave shaft 40, 70 Electric motor 40g, 41g Center of gravity 41, 71 Battery 42, 72 Remote control device 42a Receiver 42b Control device 44, 74 Reducer 45, 75 Mounting member 45a First through hole 47A to 47E First to fifth self-generated generators 47c Coil 47d Magnet 60A, 60B Third and fourth sheave covers 61 Hook support axis

Claims (11)

A plurality of sheaves that are rotatably attached to one end side and the other end side in the axial direction of the sheave shaft;
Two sheave covers attached to one end and the other end in the axial direction of the sheave shaft;
A hook provided rotatably around an axis orthogonal to the rotation axis of the sheave shaft;
A rotation drive mechanism for rotating the hook around the orthogonal axis in response to reception of a remote operation signal,
The mobile crane hook device, wherein the rotary drive mechanism is entirely accommodated in a space sandwiched between the two sheave covers.   The rotation drive mechanism includes an electric motor, a remote operation signal receiver, a control device for driving and controlling the electric motor based on the remote operation signal received by the receiver, the electric motor, the receiver, and the The mobile crane hook device according to claim 1, further comprising: a battery that supplies electric power to the control device; and a transmission member that transmits a rotational driving force of the electric motor to the hook. The hook is attached to the center in the longitudinal direction of the sheave shaft so as to be rotatable about an axis orthogonal to the rotation axis of the sheave shaft,
A fixing member that is fixedly supported at an upper center portion in the longitudinal direction of the sheave shaft and extends in a direction orthogonal to the rotation axis of the sheave shaft and the rotation axis of the hook in a space inside the sheave cover;
The mobile crane hook device according to claim 2, wherein the electric motor is fixedly supported by the mounting member such that a main body portion of the electric motor is positioned below an extension portion of the mounting member. The mounting member has an insertion portion through which the motor rotation shaft of the electric motor can be inserted in the extending portion,
The electric motor is fixedly supported at the tip of the motor rotation shaft so that a part of the transmission member protrudes above the attachment member via the insertion portion,
The hook is provided so as to penetrate through the sheave shaft and its tip protrudes above the sheave shaft;
The transmission member is provided inside the two sheave covers and in a space above the sheave shaft, and provides a rotational driving force from a motor rotation shaft above the mounting member to a hook portion above the sheave shaft. 4. A mobile crane hook device according to claim 3 configured to transmit. Below the sheave shaft, a hook support shaft attached between the two sheave covers in parallel and rotatable with the sheave shaft,
The hook device for a mobile crane according to claim 2, wherein the hook is attached to a central portion in a longitudinal direction of the hook support shaft so as to be rotatable about an axis orthogonal to a swing axis of the hook support shaft. The electric motor, the battery, and the receiver of the remote operation signal,
Centered on the sheave shaft and arranged in a positional relationship opposite to each other in plan view, and the center of gravity of the electric motor and the center of gravity of the battery and the receiver are positioned below the sheave shaft. Has been placed,
In addition, with the sheave shaft as a boundary in plan view, the electric motor's center of gravity, which takes the mass of the mounting member into account of the mass of the mounting member on the electric motor side, and the sheave shaft The center of gravity of the battery and the receiver with the mass of the mounting member added to the mass of the battery and the receiver taking into account the value obtained by multiplying the distance between and the mass of the mounting member on the battery side, and the sheave shaft The hook device for a mobile crane according to claim 3 or 4, wherein the hook device for a mobile crane is arranged in a positional relationship in which a value obtained by multiplying a distance between them is equal. A self-generated generator for generating electric power by converting vibration energy into electric energy;
The battery is a rechargeable battery,
The mobile crane hook device according to any one of claims 2 to 6, wherein the battery is charged using electric power generated by the self-generated generator. A hook attached to the center of the hook support shaft in the longitudinal direction so as to be rotatable about an axis orthogonal to the swing axis of the hook support shaft;
A rotational drive mechanism for rotationally driving the hook in response to reception of a remote operation signal;
A self-generated generator that generates vibration by converting vibration energy into electrical energy,
The rotation drive mechanism includes an electric motor, a remote operation signal receiver, a control device for driving and controlling the electric motor based on the remote operation signal received by the receiver, the electric motor, the receiver, and the A rechargeable battery for supplying power to the control device,
The mobile crane hook device is configured to charge the battery using electric power generated by the self-generated generator. The self-generating generator is
It is configured to include a linear generator that generates power by electromagnetic induction by relative movement of the coil and magnet.
The hook device for a mobile crane according to claim 7 or 8, wherein the mobile crane is provided in a posture in which a relative movement direction between the coil and the magnet is a vertical direction when the mobile crane is in a traveling posture. The self-generating generator is
It is configured to include a linear generator that generates electricity by electromagnetic induction by relative movement of the coil and magnet,
The hook device for a mobile crane according to claim 7 or 8, wherein the mobile crane is provided in a posture in which a relative movement direction between the coil and the magnet is a horizontal direction when the mobile crane is in a traveling posture.   A mobile crane provided with the hook device for mobile cranes of any one of Claim 1 to 10.

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