JP5850218B2 - Charging system at crane hook - Google Patents

Description

  The present invention relates to a charging system in a crane hook portion.

2. Description of the Related Art Conventionally, in construction sites, a crane is used when moving and attaching members, and power is supplied to electric devices at the tip of a boom (see, for example, Patent Document 1).
Patent Document 1 describes a crane in which a power supply device that supplies electric power generated using natural energy to electric devices at the tip of the boom is provided in a frame at the tip of the crane boom.

  By the way, in the conventional crane, it is calculated | required to supply electric power also to the hook and hook block for lifting a load via a sling wire. For example, by providing lighting to the hook block, workers who perform slacking work in dark openings or at night work can check the position of the hook, and the crane operator can also see the hook on the camera Becomes easier to see and more accurate driving is possible. Furthermore, there are various application methods such as providing safety equipment such as a load detector and a buzzer, a camera, various sensing devices and the like in the hook portion.

JP 2008-308328 A

In general, when power is supplied to a hook portion of a crane from the outside by a cable, a battery unit or a power generation unit is suspended below the hook and a load is suspended below the battery unit or power generation unit. However, this not only hinders the lifting work but also involves an additional work such as connecting the power cable to the battery every time power is supplied by lowering the hook part, and the work is troublesome. there were. In this case, it is necessary to lower the hook portion to the charging location and leave it at that location during charging, which is problematic in terms of space, and there is room for improvement.
Furthermore, when replacing the battery provided in the hook portion, the replacement work takes time, and the equipment has a detachable structure, so that these members may fall off during the crane operation.

  The present invention has been made in view of the above-described problems, and it is not necessary to perform incidental work associated with charging, and the charging system in the crane hook portion that can efficiently supply power to the hook portion without taking time and effort. The purpose is to provide.

To achieve the above object, a charging system for a crane hook part according to the present invention is a charging system for a crane hook part for supplying electric power to an electric device of a hook part having a hook block of a crane, and a hoisting rope A power transmission unit through which the hoisting rope can pass, a power feeding means for supplying electricity to the power transmission unit, a power receiving unit that is provided at the upper end of the hook unit and through which the hoisting rope can pass, power is supplied from the power receiving portion and a charging portion that is connected to the electric device, when the hook portion is wound up, the power receiving portion is in contact with or in proximity to the electricity transmission unit, the power from the power transmitting unit is supplied to the power receiving portion It is characterized by being.

  In the present invention, when the hook part is wound up, the power receiving part at the upper end of the hook part through which the same hoisting rope is inserted comes into contact with or close to the power transmitting part provided at the upper end part of the crane. While being in contact with or in close proximity, electricity supplied from the power feeding means to the power transmission unit can be fed from the power transmission unit to the power reception unit. Therefore, it is possible to charge the charging unit connected to the power receiving unit, the hook unit is lowered when the crane is used, and the state where the power transmitting unit and the power receiving unit are separated from each other or are in close contact with each other is released. However, electricity can be supplied from the charging unit charged in the electric device provided in the hook unit.

As described above, in the charging system of the present invention, the charging unit provided in the hook unit by the normal crane operation by hoisting the hook unit to a predetermined height outside the working hours such as the crane work pause time or nighttime. There is an advantage that the incidental work of connecting a power feeding cable to the charging unit is unnecessary when charging as in the prior art.
During charging, the hook portion is wound around the upper end portion of the crane, so that it is not necessary to place the crane in an unstable posture such as when the hook portion is lowered.

In addition, since the power transmission unit and the power reception unit are provided in the crane in advance and the power transmission unit and the power reception unit are brought into contact with or close to each other using the hoisting operation of the hook unit, the cost can be reduced. Can be planned.
Further, since the power transmission unit and the power reception unit are inserted through the same hoisting rope, the power receiving unit is within a certain range of misalignment by the hoisting operation, that is, each of the holes of the power receiving unit and the power transmission unit through which the hoisting rope passes. Can be brought into contact with or in close proximity to the power transmission unit within the range of the size of.
Furthermore, since the position of the power transmission unit can be provided at an appropriate position on the upper end of the crane, for example, the position where the power transmission unit and the power reception unit are in contact or close to each other is the position of the overwinding due to the storing operation of the hook unit. If it is difficult to wind up, use a hoisting rope in which the weight of the overwinding prevention device is not arranged, and deal with it by arranging the power transmission part at a height below the weight. Can do.

  Moreover, in the charging system in the crane hook part which concerns on this invention, a power transmission part is a power transmission coil, a power reception part is a power reception coil, and when a power reception coil adjoins to a power transmission coil, non-contact electric power feeding by an electromotive induction is performed It is preferable.

  In this case, when the hook portion is rolled up, the power receiving coil provided at the upper end of the hook portion and the power transmitting coil at the upper end of the crane are close to each other. A current is generated on the side, and this current is charged in the charging portion of the hook portion, whereby non-contact power feeding can be performed.

  Further, in the charging system for the crane hook portion according to the present invention, a detection switch for detecting a state in which the power transmission portion is contacted or pushed up by the power receiving portion wound up is provided, and when the detection switch is detected, electric power is supplied from the power feeding means to the power transmission portion. Is preferably supplied.

  In the present invention, when power is supplied from the power supply unit to the power transmission unit when a state in which the power reception unit is wound up by the detection switch is detected, power is supplied from the power supply unit to the power transmission unit at all times. There is an advantage that there is no need to keep it.

  Moreover, in the charging system in the crane hook part which concerns on this invention, it is preferable that the power transmission part is provided in the lower surface of the weight of the overwinding prevention apparatus of a crane.

  In this case, since the power transmission unit can be provided by using the weight of the conventional overwinding prevention device, a simpler structure can be achieved. Normally, when the crane work is completed, the hook portion can be wound up and stored near the spiral limit so that the hook does not shake due to wind or the like.

  According to the charging system in the crane hook unit of the present invention, the power transmission unit and the power reception unit are in contact with or close to each other only by a normal crane hoisting operation, and power is supplied from the power transmission unit to the power reception unit to supply power to the charging unit. Therefore, it is not necessary to perform incidental work accompanying charging, and power can be efficiently supplied to the hook portion without taking time and effort.

It is a side view which shows the whole structure of the charging system in the crane hook part by embodiment of this invention. It is a side view which shows the power transmission coil provided in the weight of an overwinding prevention apparatus. It is a figure of the state which is not charging in the charging system shown in FIG. It is a figure of the state in charge in the charging system shown in FIG. It is a side view which shows the structure of a hook part. It is an AA arrow directional view shown in FIG.

  Hereinafter, the charging system in the crane hook part by embodiment of this invention is demonstrated based on drawing.

  As shown in FIG. 1, the charging system in the crane hook part by this Embodiment is a system for charging the charging device 2 (charging part) mounted in the hook block 11 of the crane 1, such as a truck crane, for example. The electromagnetic induction type non-contact power feeding is performed using the weight 3 of the overwinding prevention device suspended from the tip 12a of the crane jib 12.

  The hook portion 10 of the crane 1 includes a pair of sheaves 13A and 13B wound around a hook block 11 by a hoisting rope 16, and the hook block 11 suspended from the sheaves 13A and 13B by a suspension cable 14. Consists of.

  As shown in FIGS. 2 and 3, a limit switch 15 (detection switch) for restricting the hoisting operation is attached to the tip 12 a of the crane jib 12. The limit switch 15 is composed of a rotary lever, and a weight 3 supported by a fall prevention wire 31 is suspended from the switch tip 15a. The weight 3 has a substantially donut shape, and a hoisting rope 16 is inserted through the central hole 3a.

  As shown in FIG. 4, when the hook block 11 (the sheaves 13A and 13B) is lifted by the hoisting operation, the overwinding prevention device provided with the weight 3 is one of the sheaves 13A and 13B (reference numeral 13A in FIG. 1). The weight 3 (power transmission coil 4 described later) is pushed up by the upper end of the sheave. Further, the push-up operation of the weight 3 causes the sheave 13A to support the weight 3, the fall prevention wire 31 of the weight 3 is loosened, and the limit switch 15 lever is built in and rotates in the opposite direction by the spring force. The switch 15 is activated.

As shown in FIGS. 3 and 4, a power transmission coil 4 (power transmission unit) is provided on the lower surface of the weight 3 coaxially with the weight 3. That is, the power transmission coil 4 is provided on the tip 12a (crane upper end portion) of the crane jib 12 shown in FIG. 1 via the weight 3, and the hoisting rope 16 can pass therethrough. Are used, and a cross-sectional shape such as a donut shape, a C shape, or a rectangle is used. In this embodiment, an example of a donut shape is shown. The power transmission coil 4 is connected to a power source of an operator room via a high-frequency oscillator (not shown) by a power supply cable 41 serving as power supply means.
Then, when the limit switch 15 of the above-described overwinding prevention device is activated and an on state is detected, electricity is supplied from the power supply cable 41 to the power transmission coil 4.

  As shown in FIGS. 5 and 6, the hook block 11 includes an electric device 5 such as a lighting or communication device, and a charging device 2 (charging unit) including a battery and a rectifier circuit.

One sheave 13A is provided with a power receiving coil 6 (power receiving portion) through which the hoisting rope 16 can pass above the mounting base 13a. The power receiving coil 6 is a molded waterproof type and has a cross-sectional shape such as a donut shape, a C shape, or a rectangular shape. In this embodiment, an example of a donut shape is shown. The power receiving coil 6 and the battery of the charging device 2 are connected by a power feeding cable 7. Since the distance between the sheave 13A and the hook block 11 does not change, the length of the power supply cable 7 is constant.
In addition, by using a mold type electromagnetic induction type, reliable charging can be performed without being affected by rainwater or dirt.

As shown in FIG. 4, the sheave 13A is wound together with the hook block 11, close to the receiving coil 6 is electricity transmission coil 4, will be powered contactlessly from the power transmission coil 4 to the receiving coil 6.

Next, the operation of the charging system having the above-described configuration will be described in detail.
As shown in FIG. 4, when the hook portion 10 is wound up, the power receiving coil 6 at the upper end of the sheave 13 </ b> A through which the same hoisting rope 16 is inserted is provided at the upper end 12 a (see FIG. 1) of the crane jib 12. The coil 4 is close to the coil 4 with a space.

  At this time, since the power transmission coil 4 is fixed to the lower surface of the weight 3 of the overwinding prevention device and is suspended from the upper end 12a of the crane jib 12 by the fall prevention wire 31, the power reception coil 6 is wound up by the power reception coil 6 wound up. When pushed up, the fall prevention wire 13 is loosened. When this slack state is detected by the limit switch 15, electricity is supplied from the power supply cable 41 to the power transmission coil 4. Therefore, there is an advantage that it is not always necessary to supply power to the power transmission coil 4 from the power supply cable 41.

  As described above, while the power receiving coil 6 is close to the power transmitting coil 4, a current is generated on the power receiving coil 6 side by the principle of electromagnetic induction with respect to the power transmitting coil 4 fed by the power feeding cable 41, and this current is hooked. The charging device 2 of the block 11 is charged, and thereby non-contact power feeding can be performed.

  Therefore, the charging device 2 connected to the power receiving coil 6 can be charged, the hook portion 10 is lowered when the crane is used, and the state where the power transmitting coil 4 and the power receiving coil 6 are separated and released is released. Even in this case, electricity can be supplied from the charging device 2 charged in the electric device 5 provided in the hook block 11.

That is, the charging device 2 provided in the hook block 11 can be charged by a normal crane operation by winding the hook portion 10 to a predetermined height outside the working time such as a crane working stop time or at night. In addition, there is an advantage that an incidental operation of connecting a power feeding cable to the charging unit is unnecessary when charging as in the conventional case.
And since it will be in the state by which the hook part 10 was wound up by the crane upper end part during charge, it becomes unnecessary to arrange | position the crane 1 with unstable postures, such as the state which lowered | hung the hook part 10. FIG.

In addition, since the power transmission coil 4 and the power reception coil 6 are provided in the crane 1 in advance and the power transmission coil 4 and the power reception coil 6 are brought close to each other by using the hoisting operation of the hook portion 10, Cost can be reduced.
Further, since the power transmission coil 4 and the power reception coil 6 are inserted through the same winding rope 16, the power reception coil 6 is within a certain misalignment range by the winding operation, that is, the power reception coil 6 that passes the winding rope 16. It can be made to adjoin with respect to the power transmission coil 4 within the range of the size of each hole of the power transmission coil 4.

  Moreover, since the power transmission coil 4 is provided using the weight 3 of the conventional overwinding prevention device, it is possible to make the structure simpler. Normally, when the crane work is finished, the hook portion 10 can be wound up and stored near the spiral limit so that the hook is not shaken by wind or the like.

  As described above, in the charging system in the crane hook portion according to the present embodiment, the power transmission coil 4 and the power receiving coil 6 are brought close to each other only by a normal hoisting operation of the crane 1, and power is supplied from the power transmitting coil 4 to the power receiving coil 6 for charging. Since electric power is supplied to the device 2, it is not necessary to perform an incidental operation accompanying charging, and electric power can be efficiently supplied to the hook unit 10 without taking time and effort.

As mentioned above, although embodiment of the charging system in the crane hook part by this invention was described, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, it can change suitably.
For example, in the present embodiment, the power transmission coil 4 is fixed to the lower surface of the weight 3 using a conventional vortex prevention device, but the present invention is not limited to this. In other words, the position of the power transmission coil 4 (power transmission unit) can be provided at an appropriate position on the upper end of the crane. For example, the position where the power transmission unit and the power reception unit are in contact or close to each other is excessive due to the storing operation of the hook unit. If it is difficult to wind up to the winding position, it may be provided separately from the overwinding prevention device. Specifically, this can be dealt with by using a hoisting rope in which the weight of the overwinding prevention device is not disposed and arranging the power transmission unit at a height below the weight.

Further, in this embodiment, non-contact power feeding is performed by the power transmission coil 4 and the power receiving coil 6, but a power feeding method by contact without using a coil may be used.
Further, in the present embodiment, the method of detecting the winding state of the hook portion 10 by the limit switch 15 is used, but the present invention is not limited to this, and other detection methods can be adopted.

Furthermore, in the charging system of the present embodiment, the crane 1 composed of a truck crane is applied, but the present invention is not limited to this, and the tower crane, jib crane, portal crane, indoor overhead crane, etc. It is also possible to apply.
In the present embodiment, the power receiving coil 6 (power receiving unit) is provided at the upper end of the sheave 13A. However, in the case of a crane that does not include a sheave, the power receiving unit can be provided above the hook block.

  In addition, it is possible to appropriately replace the components in the above-described embodiments with known components without departing from the spirit of the present invention.

1 Crane 2 Charging device (charging unit)
3 Weight 4 Power transmission coil (Power transmission part)
5 Electrical equipment 6 Power receiving coil (power receiving unit)
7 Feeding cable 10 Hook part 11 Hook block 12 Crane jib 12a Upper end (crane upper end)
13A, 13B Sheave 15 Limit switch (Detection switch)
16 Hoisting rope 41 Feeding cable

Claims (4)

A charging system in a crane hook part for supplying electric power to an electric device provided in a hook part having a hook block of a crane,
A power transmission unit that is provided at the upper end of the crane that sends out the hoisting rope, and through which the hoisting rope can pass,
Power supply means for supplying electricity to the power transmission unit;
A power receiving unit that is provided at an upper end of the hook unit and through which the hoisting rope can pass;
A charging unit to which power is supplied from the power receiving unit and connected to the electrical device;
With
Charging system in the when the hook portion is wound up, a crane hook, wherein the power receiving unit is in contact with or close to the electricity transmission unit is powered from the power unit to the power receiving unit. The power transmission unit is a power transmission coil, and the power reception unit is a power reception coil,
2. The charging system for a crane hook according to claim 1, wherein when the power receiving coil comes close to the power transmitting coil, non-contact power feeding by electric induction is performed. A detection switch for detecting a state of being touched or pushed up by the power receiving unit on which the power transmission unit is wound up;
3. The charging system for a crane hook unit according to claim 1, wherein electricity is supplied from the power feeding unit to the power transmission unit when the detection switch is detected.   The charging system for a crane hook unit according to any one of claims 1 to 3, wherein the power transmission unit is provided on a lower surface of a weight of a crane overwinding prevention device.

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