JP2020050465A - Hanging tool device - Google Patents

Abstract

To reduce size and weight of a hanging tool device with a hanging load turning mechanism.SOLUTION: A hanging tool device 20 comprises: a gyro unit 21; a sheave mechanism 22; a rotary coupling tool 23 connecting the gyro unit 21 to the sheave mechanism 22 in a horizontally turnable state; and gyro control means 24 to perform drive control of the gyro unit 21. The gyro unit 21 has a hanging load turning mechanism comprising: a flywheel; a rotation driving device to drive rotation of the flywheel; and an inclination drive device to drive the flywheel in a tilting state. The gyro unit 21 is driven by an external power source. A rotary electric contact point 26 is installed around the rotary coupling tool 23, and supplies to the gyro unit 21, power that is sent from the external power supply to the sheave mechanism section 22. In addition, the gyro control means 24 for remotely controlling the gyro unit 21, is installed in a place other than a suspended part in the hanging tool device 20.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a hoisting device having a suspended load turning mechanism used in cranes such as an overhead crane and a bridge type crane.

  In FIG. 1 and the like of Patent Document 1, a crane girder 9 installed in a beam shape, a trolley 7 supported by the crane girder in a state capable of moving in a horizontal direction along the crane girder 9, and a trolley 7 are suspended from the trolley 7. An overhead crane having a wire rope 19 and a hook 21 attached to a lower portion of the wire rope 19 is described. This type of overhead crane is mainly installed in a building such as a factory, and is used when a heavy object is transported in the building. However, when unloading a suspended load lifted by an overhead crane, it was necessary to adjust the direction of the suspended load manually by an operator. For this reason, the work of transporting the suspended load by the overhead crane is not only dangerous but also requires labor.

  In this regard, FIG. 4 and the like of Patent Document 2 include a gyro unit including a flywheel 20, a rotation motor 50 for driving the flywheel 20 to rotate, and a tilting motor 64 for tilting the flywheel 20. Swinging device 10 (a hoisting device having a swing load swinging mechanism) that swings a hanging object (hanging load) using a gyro effect generated by tilting the flywheel 20 rotated by the tilt motor 64 by the tilt motor 64. Device). This makes it possible to mechanically rotate the suspended load, and not only enhance the safety of the worker, but also to efficiently carry the suspended load.

JP 2011-184170 A JP 2014-131941 A

  However, although the suspended object turning device 10 (a hanging device having a suspended load turning mechanism) of Patent Document 2 is used for a large crane such as a climbing crane, it is used for a relatively small crane such as an overhead crane. I didn't. This is because, in this type of hanging device, a control unit 82 (control panel) for controlling the rotation motor 50 and the tilting motor 64 is a gyro unit, as shown in FIG. In addition to being provided in the vicinity (a hanging portion of the hanging device), a battery for driving the rotation motor 50 and the tilting motor 64 is also provided in the vicinity of the gyro unit (the hanging portion of the hanging device). This is because the hanging device itself is large and heavy. When such a large and heavy lifting device is used with a relatively small crane such as an overhead crane, it becomes difficult not only to secure the head but also to secure the lifting load of the crane.

  The present invention has been made in order to solve the above-mentioned problems, and by reducing the size and weight of a hanging device having a suspended load turning mechanism, the hanging device can be relatively small, such as an overhead crane. It is possible to use the crane suitably.

The above issues are
A gyro unit arranged above the loading hook,
A sheave mechanism disposed above the gyro unit and around which a hanging wire is wound;
A rotary connector for connecting the gyro unit to the sheave mechanism in a horizontally rotatable state,
Gyro control means for controlling the drive of the gyro unit,
The gyro unit is
Flywheel,
A driving device for rotating the flywheel,
A lifting device having a lifting load turning mechanism configured with a tilt drive device that tilts and drives the flywheel,
The gyro unit is driven by an external power supply,
A rotary electrical contact for supplying the power transmitted from the external power source to the sheave mechanism to the gyro unit is provided around the rotary connector,
The gyro control means remotely controls the gyro unit, and can be installed at a portion other than a suspended portion (a portion suspended by a suspending wire; the same applies hereinafter) in the suspending device. The problem is solved by providing a hanging device.

  In the hanging device of the present invention, since the rotation driving device and the tilting driving device are driven by an external power supply such as a commercial power supply, it is not necessary to provide a battery in the hanging portion of the hanging device. In addition, the hanging device of the present invention has no gyro control means in the suspended portion. Therefore, the hanging device of the present invention can reduce the size and weight of the hanging portion. According to the hanging device of the present invention, a hanging device having a suspended load turning mechanism is incorporated in a crane such as an overhead crane which is relatively small and has a limited installation height. Also, it is possible to secure the head. In addition, a large lifting load of the crane can be secured.

  The hanging device of the present invention includes a tilting state detection limit switch for detecting a tilting state of the flywheel, and the tilting state detection limit switch is disposed on the opposite side of the tilting drive device with the flywheel interposed therebetween. It is preferable to use

  By detecting the tilting state of the flywheel with a limit switch instead of a rotary encoder, the detection mechanism can be simplified, and the hanging portion of the hanging device can be further reduced in size and weight. In addition, when the weight of the hanging portion of the hanging device is reduced, the hanging portion (such as the gyro unit) may be tilted due to slight deviation of the weight balance of the hanging portion. In this regard, by disposing the tilting state detection limit switch on the opposite side of the tilting drive device, the tilting state detection limit switch can function as a counterweight of the tilting drive device, and the weight of the hanging part of the hanging device can be reduced. It also makes it easier to balance.

  By the way, in a large crane such as a climbing crane, usually, a plurality of sets of hanging wires are suspended, and a load is often lifted by the plurality of sets of hanging wires. For this reason, even if a hanging device having a suspended load swing mechanism is interposed above the suspended load hook to rotate the suspended load, the suspended wire is less likely to be twisted. On the other hand, in a relatively small crane such as an overhead crane or the like, usually only one set of hanging wires (one hanging wire which is suspended in a “U” shape and suspended) is used. Often lift loads. For this reason, if a hanging device having a suspended load turning mechanism is interposed above the suspended load hook, the suspended wire may be twisted when rotating the suspended load. For this reason, it is preferable to employ the following structure in the hanging device of the present invention.

  That is, the sheave mechanism has a first sheave arranged on one side in the horizontal direction of the gyro unit and a second sheave arranged on the other side in the horizontal direction of the gyro unit. When this configuration is adopted, one side of the hanging wire folded in a “U” shape is looped around the first sheave side, and the other side is looped around the second sheave side. Accordingly, even when a suspended load is lifted using one suspension wire, one side and the other side of the folded portion of the one suspension wire are disposed at positions separated by a gyro unit. And the suspension wire can be made hard to twist.

  However, at this time, the gyro unit comes to be located between the first sheave and the second sheave when the hanging device is viewed from above. For this reason, the suspending wire guided from the lower side of the first sheave to the lower side of the second sheave (the suspending wire guided from the lower side of the second sheave to the lower side of the first sheave) is a gyro unit, a rotary connector, and a rotary connector. In order not to interfere with the electrical contacts or the like, it is usually necessary to provide the entire first sheave and second sheave above the upper surface of the gyro unit. However, in this case, the vertical length (height) of the hanging device becomes long, and it becomes difficult to secure the lift of the crane. For this reason, in the case of the hanging device of the present invention, when the sheave mechanism is constituted by the first sheave and the second sheave, the following structure is preferably adopted.

  That is, it is preferable that each of the first sheave and the second sheave is constituted by a lower sheave located below the upper surface of the gyro unit and an upper sheave located above the upper surface of the gyro unit. Thereby, even if the lower sheave constituting the first sheave and the lower sheave constituting the second sheave are arranged at a height overlapping the gyro unit on the side of the gyro unit, even from the lower side of the first sheave An upper wire constituting a first sheave and an upper wire constituting a second sheave are connected to a suspension wire guided to a lower side of a second sheave (a suspension wire guided from a lower side of a second sheave to a lower side of the first sheave). With the sheave, it is possible to guide the gyro unit to the upper side. This makes it possible to suppress the vertical length of the hoisting device and secure the lift of the crane.

  The hanging device of the present invention can be used for various cranes used in an environment where an external power source such as a commercial power source can be used. However, a relatively small crane, such as a climbing crane, is more difficult to secure a lifting load and its height is often limited than a crane that is large and has a large lifting load and the height is not particularly limited. It is preferable to employ it with a crane. As described above, the hanging device of the present invention can be reduced in size and weight, but if used with a relatively small crane, the significance of using it can be increased. Examples of such relatively small cranes include overhead cranes and bridge cranes, as well as mobile cranes.

  As described above, according to the present invention, it is possible to reduce the size and weight of a hanging device having a suspended load turning mechanism, and to use the hanging device with a relatively small crane such as an overhead crane. Become.

It is the figure which showed the overhead crane which incorporated the hanging equipment of this invention. It is the front view which showed the hanging equipment of this invention. It is a side view showing the hanging equipment of the present invention.

  A preferred embodiment of the hanging device of the present invention will be described more specifically with reference to the drawings. In the following, for convenience of explanation, the hanging device of the present invention will be described by taking as an example a case where the hoisting device is incorporated into an overhead crane, but as described above, the hanging device of the present invention is a crane (bridge) other than the overhead crane. Mold cranes and mobile cranes). FIG. 1 is a diagram showing an overhead crane 10 incorporating a hanging device 20 of the present invention. An overhead crane 10 shown in FIG. 1 includes a crane girder 11, a trolley 12, a hanging wire 13, a load hanging hook 14, and the like.

  The crane girder 11 is usually provided in a horizontal direction near a ceiling in a building 30 such as a factory. At both ends of the crane girder 11, saddles 11a are provided. The pair of saddles 11a is supported by a pair of runways 15 (rails) fixed to a wall surface or the like of the building 30. Therefore, when the saddle 11a is rotationally driven, the saddle 11a rotates on the runway 15, and the crane girder 11 moves along the runway 15 (moves in a direction perpendicular to the plane of FIG. 1). The movement of the crane girder 11 along the runway 15 is called “longitudinal”.

  The trolley 12 is for hanging the hanging wire 13, and is supported by the crane girder 11. The trolley 12 can move along the longitudinal direction of the crane girder 11. The movement of the trolley 12 along the crane girder 11 is called “traversing”. By combining the horizontal movement of the trolley 12 and the vertical movement of the crane girder 11, the suspended load 50 can be conveyed from one point to another point in the building 30 by a desired route. ing. The trolley 12 is provided with a hanging wire winding device 12a for winding and unwinding the hanging wire 13.

  The suspension wire 13 is used to suspend the suspended load 50 and is suspended from the trolley 12. In the vicinity of the lower end of the hanging wire 13, a load hanging hook 14 for hanging a hanging load 50 is attached. When the hanging wire 13 is wound by the hanging wire winding device 12a, the suspended load 50 rises, and when the hanging wire 13 is unreeled from the hanging wire winding device 12a, the suspended load 50 descends. In the present embodiment, the hanging wire 13 is suspended from the trolley 12 in a state of being folded in a “U” shape. For this reason, the load of the hanging load 50 applied to the hanging wire 13 can be distributed to one side of the hanging wire 13 (one side viewed from the folded portion) and the other side (the other side viewed from the folded portion). In addition to increasing the durability of the hanging wire 13, it is possible to use a small-sized hanging wire winding device 12a having a small output.

  In the above overhead crane 10, the hanging device 20 of the present invention is interposed between the lower end of the hanging wire 13 and the load hook 14. This hanging device 20 is for horizontally rotating the suspended load 50. When the operation of adjusting the orientation of the suspended load 50 when the suspended load 50 is transported is manually performed by the worker 40, not only is the worker 40 dangerous but also the efficiency of the transport operation is reduced. As described above, the use of the hanging device 20 allows the direction of the suspended load 50 to be adjusted mechanically without the manual operation of the worker 40. For this reason, the safety of the worker 40 and the efficiency of the transport operation can be improved.

  FIG. 2 is a front view showing the hanging device 20. FIG. 3 is a side view showing the hanging device 20. As shown in FIGS. 2 and 3, the hanging device 20 includes a gyro unit 21, a sheave mechanism unit 22, a rotation connecting unit 23, and a gyro control unit 24.

The gyro unit 21 is a portion that can be said to be the heart of the hanging device 20, and is a portion that expresses the operation of horizontally rotating the suspended load 50. Gyro unit 21 includes a flywheel 21a, a rotary drive unit 21b for rotating the flywheel 21a around the axis _{L 1,} and a tilting drive unit 21c for tilt driving the flywheel 21a around the axis _{L 2} Have. Usually, an electric motor (motor) is used as the rotation drive device 21b or the tilt drive device 21c. Among them, as the tilt drive device 21c, an electric motor with a reduction gear can be preferably used. The flywheel 21a is supported and rotated about the axis L _1, the frame-like turntable to allow the two rotation between rotation about the axis L ₂ (biaxial gimbal 21). The axis L ₁ for rotating the flywheel 21a, the axis L ₂ for tilting the flywheel 21a is a non-parallel state, is generally perpendicular state.

In the gyro unit 21 drives the rotary drive unit 21b, in a state in which by rotating the flywheel 21a to the axis L ₁ about to drive the tilt drive unit 21c, tilting the flywheel 21a to the axis L ₂ about It is allowed when the axial line L ₁ and axis perpendicular L ₃ about the gyro moment the axis L ₂ occurs. This gyro moment, gyro unit 21 is horizontally pivot around the axis line L _3. Since the hanging load hook 14 is integrally attached to the lower part of the gyro unit 21, when the gyro unit 21 turns horizontally, the hanging load 50 hung on the hanging hook 14 also turns horizontally. When the flywheel 21a is tilted in the opposite direction, the gyro unit 21 can be horizontally turned in the opposite direction.

  The drive control of the gyro unit 21 (the drive control of the rotation drive device 21b and the tilt drive device 21c) is performed by the gyro control means 24 (FIG. 1). As described above, in the gyro unit 21 for a large crane that has been conventionally proposed, a portion corresponding to the gyro control means 24 is provided near the gyro unit 21. In other words, in the gyro unit 21 for a large crane, a portion corresponding to the gyro control means 24 is provided in a portion suspended by the suspension wire 13.

  However, since the gyro control means 24 is provided in a state of a control panel, it has a relatively large size and a heavy weight. It is not preferable in the overhead crane 10 to provide the gyro control means 24 having such dimensions and weight in a portion (near the gyro unit 21) suspended by the suspension wire 13. This is because the overhead crane 10 cannot secure a lifting load unlike a large crane such as a climbing crane, and in addition, there are many restrictions on the height at which the crane girder 11 is provided, and it is difficult to secure a head. Because.

  In this regard, in the gyro unit 21 of the hanging device 20 of the present invention, as shown in FIG. 1, the gyro control means 24 is provided at a position remote from the gyro unit 21, and the weight of the gyro control means 24 is reduced. The wire 13 is prevented from hitting. The place where the gyro control means 24 is provided is not particularly limited as long as the weight of the gyro control means 24 is not applied to the hanging wire 13. As a place that satisfies the condition, a floor surface or a wall surface of the building 30 is exemplified. In this embodiment, the gyro control means 24 is provided on the trolley 12. The control signal of the gyro unit 21 is generated by the gyro control means 24 in response to the operation of the remote controller 25 by the operator 40, and transmitted from the gyro control means 24 to the gyro unit 21 by wire or wirelessly. .

  As described above, the gyro unit 21 for a large crane that has been conventionally proposed is driven by electric power stored in a battery provided near the gyro unit 21. In other words, in the gyro unit 21 for a large crane, a battery for storing electric power for driving the gyro unit 21 is provided at a portion suspended by the suspension wire 13. However, this type of battery requires more space than the above-mentioned control panel (gyro control means 24) and is heavy. It is not preferable for the overhead crane 10 to provide a battery having such dimensions and weight at a portion (near the gyro unit 21) suspended by the suspension wire 13.

  In this regard, the gyro unit 21 in the hanging device 20 of the present invention is driven by an external power supply such as a commercial power supply, and a battery is provided in the vicinity of the gyro unit 21 (portion suspended by the hanging wire 13). It is unnecessary. For this reason, the portion (around the gyro unit 21) of the hoisting device 20 that is hung by the hanging wire 13 can be reduced in size and weight, and the lift and lifting load of the overhead crane 10 can be secured. It has become. In the above-mentioned large-sized crane, it is not unusual that the total weight of the portion suspended by the suspension wire 13 in the portion corresponding to the suspension device 10 exceeds 2 tons. The gyro unit 21 is driven by an external power supply to omit the battery, and the gyro control means 24 is provided at a position distant from the gyro unit 21 so that the total weight of the same portion can be suppressed to half or less. It is possible.

  However, when the area around the gyro unit 21 is reduced in size and weight as described above, the gyro unit 21 is easily tilted due to a slight bias in the weight balance around the gyro unit 21. In particular, when an electric motor with a reduction gear is used as the tilting drive device 21c, the weight balance around the gyro unit 21 tends to be biased due to the weight of the tilting drive device 21c. In this regard, in the present embodiment, as shown in FIG. 2, a tilt state detection limit switch 21e is attached to a portion of the gyro unit 21 opposite to the tilt drive device 21c across the flywheel 21a. I have. This tilt state detection limit switch 21e detects the tilt state of the flywheel 21a. By arranging the tilt state detection limit switch 21e as described above, the tilt state detection limit switch 21e can be used. It can also function as a counterweight of the tilting drive device 21c, which makes it easy to balance the weight around the gyro unit 21.

  Driving the gyro unit 21 with an external power supply means that the external power supply and the gyro unit 21 need to be connected by an electric cable. However, while the gyro unit 21 is in a rotating system that performs horizontal turning, the external power supply is usually in a non-rotating system. For this reason, if the external power supply and the gyro unit 21 are directly connected by an electric cable, the electric cable is twisted when the gyro unit 21 is horizontally turned, and there is a possibility that disconnection or the like may occur.

  In this regard, in the hanging device 20 of the present invention, as shown in FIGS. 2 and 3, a rotary electric contact 26 is provided around a rotary connector 23 that connects the gyro unit 21 and the sheave mechanism 22. I have. As the rotary electrical contact 26, of a pair of members that rotate relatively, an annular electrode (metal ring or the like) provided on one member and an electrode (metal brush or the like) provided on the other member. A slip ring or the like having a structure in which electric power is transmitted between a pair of members by circumscribing or inscribing the. As described above, by using the rotary electric contact 26, as shown in FIG. 1, the electric power transmitted from the external power supply to the sheave mechanism 22 through the electric cable 27 is supplied to the gyro unit 21 and the gyro unit 21 is supplied. The electric cable 27 can be prevented from being twisted even when is turned horizontally.

  In the present embodiment, as shown in FIG. 1, while the electric cable 27 is hung from the trolley 12 to the sheave mechanism 22, an automatic take-up reel (not shown) provided on the trolley 12 The electric cable 27 is automatically wound up. That is, when the hanging wire 13 is paid out from the hanging wire winding device 12a and the gyro unit 21 is lowered, the electric cable 27 is drawn out from the automatic winding type reel in accordance with the lowering, while the hanging wire winding device 12a is used to lift the electric cable 27. When the wire 13 is wound up and the gyro unit 21 rises, the electric cable 27 is wound up on an automatic winding type reel in accordance with the rise. As described above, by using the automatic winding type reel, the electric cable 27 can be hardly entangled with the hanging wire 13 or the like.

As shown in FIG. 2, the sheave mechanism portion 22 is a portion having sheaves (pulleys) 22 a, 22 b, 22 c, and 22 d for hanging the suspension wire 13, and is disposed above the gyro unit 21. The sheave mechanism 22 is connected to the gyro unit 21 via the above-described rotary connection tool 23. Gyro unit 21, as described above, by rotating and tilting the flywheel 21a, where the horizontal turn about the axis L _3, the rotary connecting member 23, pivoting of the gyro unit 21 to the sheave mechanism 22 The gyro unit 21 and the sheave mechanism 22 are connected in a state where the gyro unit 21 is not transmitted (a state in which the gyro unit 21 is allowed to turn with respect to the sheave mechanism 22).

However, even when the gyro unit 21 and the sheave mechanism 22 are connected via the rotary connector 23, when the gyro unit 21 horizontally turns with respect to the sheave mechanism 22, the axis L Some rotation resistance occurs around _three turns. For this reason, when the gyro unit 21 makes a horizontal turn, the sheave mechanism unit 22 may rotate (or make a horizontal turn with the gyro unit 21). If the sheave mechanism 22 turns horizontally, the suspension wire 13 wound around the sheaves 22a, 22b, 22c, and 22d is twisted, and the suspension wire winding device 12a winds or unwinds the suspension wire 13. There is a risk that the operation will not be performed normally.

  In this regard, in the present embodiment, in the present embodiment, the sheaves 22a, 22b, 22c, and 22d of the sheave mechanism section 22 are provided with the first sheaves 22a and 22b arranged on one side in the horizontal direction of the gyro unit 21 and the horizontal direction of the gyro unit 21. It is composed of second sheaves 22c and 22d arranged on the other side. In this way, by hanging the suspension wire 13 around the first sheaves 22a, 22b and the second sheaves 22c, 22d arranged at locations separated in the horizontal direction, the suspension wire 13 can be less likely to be twisted. Has become.

  In addition, in order to secure a lift, it is preferable that the hanging wire 13 be looped around the first sheave 22a, 22b and the second sheave 22c, 22d at a position as low as possible. However, when the first sheaves 22a and 22b and the second sheaves 22c and 22d are provided at a position lower than the upper surface of the gyro unit 21, the suspension wire 13 guided from the first sheaves 22a and 22b to the second sheaves 22c and 22d is formed. It interferes with the gyro unit 21. In this regard, in the present embodiment, the first sheaves 22a and 22b are composed of a lower sheave 22a located below the upper surface of the gyro unit 21 and an upper sheave 22b located above the upper surface of the gyro unit 21. In addition, the second sheaves 22c and 22d are configured by a lower sheave 22c located below the upper surface of the gyro unit 21 and an upper sheave 22d located above the upper surface of the gyro unit 21. Therefore, the suspension wire 13 between the first sheaves 22a and 22b and the second sheaves 22c and 22d can be prevented from interfering with the gyro unit 21.

DESCRIPTION OF SYMBOLS 10 Overhead crane 11 Crane girder 11a Saddle 12 Trolley 12a Hanging wire take-up device 13 Hanging wire 14 Loading hook 15 Runway 20 Hanging device 21 Gyro unit 21a Flywheel 21b Rotation drive device 21c Tilt drive device 21d Biaxial gimbal 21e Tilt state detection limit switch 22 Sheave mechanism 22a Sheave (lower sheave that constitutes first sheave)
22b sheave (upper sheave constituting first sheave)
22c sheave (lower sheave constituting second sheave)
22d sheave (upper sheave constituting second sheave)
Reference Signs List 23 Rotating connection tool 24 Gyro control means 25 Remote controller 26 Rotary electric contact 27 Electric cable 30 Building 40 Worker 50

Claims (6)

A gyro unit arranged above the loading hook,
A sheave mechanism disposed above the gyro unit and around which a hanging wire is wound;
A rotary connector for connecting the gyro unit to the sheave mechanism in a horizontally rotatable state,
Gyro control means for controlling the drive of the gyro unit,
The gyro unit is
Flywheel,
A driving device for rotating the flywheel,
A lifting device having a lifting load turning mechanism configured with a tilt drive device that tilts and drives the flywheel,
The gyro unit is driven by an external power supply,
A rotary electrical contact for supplying the power transmitted from the external power source to the sheave mechanism to the gyro unit is provided around the rotary connector,
A hanging device, wherein the gyro control means remotely controls the gyro unit and can be installed at a position other than the suspended portion of the hanging device.
Equipped with a tilt state detection limit switch for detecting the tilt state of the flywheel,
2. The hoisting device according to claim 1, wherein the tilting state detecting limit switch is disposed on the opposite side of the tilting drive device with respect to the flywheel.
The sheave mechanism is
A first sheave arranged on one side in the horizontal direction of the gyro unit,
The hanging device according to claim 1 or 2, further comprising a second sheave disposed on the other side in the horizontal direction of the gyro unit.
Each of the first sheave and the second sheave is
A lower sheave located below the top surface of the gyro unit,
4. The hanging device according to claim 3, comprising an upper sheave located above an upper surface of the gyro unit.
An overhead crane provided with the hanging device according to claim 1.
A bridge-type crane provided with the hanging device according to claim 1.

Images