JP2014169171A - Power supply device of crane - Google Patents

Abstract

An object of the present invention is to prevent entanglement of power supply cables when the power supply cables are stored in a cable storage basket.
A cable storage basket 19 for storing a power supply cable 9 is installed in a suspension suspended from a trolley on a crane, and the power supply cable is stored in the cable storage basket as the suspension is raised and lowered. In a power feeding device for a crane that feeds out from the cable storage basket, a ring-shaped roller bracket 27 having a group of rollers 34 for power supply cable guides is rotatably installed directly above the cable storage basket 19. .
[Selection] Figure 2

Description

  The present invention relates to a power feeding device for a crane that supplies electric power to a lifting tool suspended from a trolley, such as a crane such as a container crane or a transfer crane.

  Conventionally, as shown in FIG. 6, a cable storage basket 1 is composed of a basket guide portion 2 and a basket storage portion 3, and a basket guide is provided by a bearing 4 provided between the basket guide portion 2 and the basket storage portion 3. There is a device in which the portion 2 is rotatable (see, for example, Patent Document 1).

  By the way, the feeding cable 9 for supplying power to the hanging tool suspended from the trolley is previously provided with a winding rod for forming a loop, and the feeding cable 9 is lifted up in the cable storage basket 1 by lifting the hanging tool. When the power supply cable 9 is stored, the power supply cable 9 is rotated in a loop shape by the winding hook, and is stored in the basket storage portion 3 in a loop shape as if a snake winds around the coil.

  However, as shown in FIG. 6, the conventional basket guide portion 2 is an integrated upper guide ring 5, lower ring 6, and a large number of inclined members 7 that connect both, like a shade of a table lamp. The upper guide ring 5 has a diameter of about 30 cm, the lower ring 6 has a diameter of about 1 to 1.2 m, and the basket guide part 2 has a height of about 1 m. When the power supply cable 9 is stored in the cable storage basket 1, the basket guide portion 2 may not follow the rotation of the power supply cable 9 even if the power supply cable 9 contacts the upper guide ring 5.

  As described above, when the basket guide portion 2 does not follow the rotation of the power supply cable 9, the friction in the horizontal direction (tangential direction) becomes larger than the friction in the vertical direction, and the power supply cable 9 is twisted and twisted. There are cases where the two are intertwined, or the middle portion of the power supply cable 9 hangs outwardly from the upper guide ring 5 in a U-shape (see FIG. 4). Reference numeral 8 denotes a lifting beam.

Japanese Utility Model Publication No. 1-83768

  The present invention provides a power supply device for a crane in which the power supply cables are not entangled when the power supply cables are stored in the cable storage basket, or the power supply cables do not hang outwardly from the upper guide ring. There is to do.

  According to a first aspect of the present invention, a cable storage basket for storing a power supply cable is installed in a suspension suspended from a trolley on a crane, and the power supply cable is connected to the cable storage as the suspension is lifted. In a power feeding device for a crane that is housed in a basket or that is fed out from the cable housing basket, a ring-shaped roller bracket having a roller group for feeding cable guides is rotatable directly above the cable housing basket. It is characterized by installation.

  According to a second aspect of the present invention, a ring-shaped roller bracket provided with a group of rollers for feeding cable guides is rotatably installed directly above the cable storage basket, and the roller bracket is attached to the roller bracket. It is characterized in that it is supported by a large number of support rollers arranged along the outer periphery.

  According to a third aspect of the present invention, a ring-shaped roller bracket having a roller group for feeding cable guides is rotatably installed directly above the cable storage basket, and the V-shaped outer periphery of the roller bracket is provided. The surface is supported by a large number of support rollers arranged along the outer periphery of the roller bracket.

  The present invention provides a cable storage basket for storing a power supply cable in a suspension suspended from a trolley on a crane, and stores the power supply cable in the cable storage basket with the lifting and lowering of the suspension, Alternatively, in a power feeding device for a crane that is fed out from the cable storage basket, a ring-shaped roller bracket having a group of power cable guide rollers is rotatably installed immediately above the cable storage basket. Inertia is smaller than that of a conventional basket guide such as a shade of a desk lamp, and when the power supply cable is stored in the cable storage basket, the roller bracket rotates smoothly following the rotation of the power supply cable. .

  For this reason, when the power supply cable is stored in the cable storage basket, the power supply cables are not entangled. Moreover, it is suppressed that a feed cable hangs outward from a ring-shaped roller bracket in U shape.

It is a side view of the hanger to which the electric power feeding cable storage basket which concerns on this invention is applied. It is a principal part expanded side view containing the partial cross section of the electric power feeding cable storage basket which concerns on this invention. It is AA sectional drawing of FIG. It is action | operation explanatory drawing of the electric power feeding cable storage basket which concerns on this invention. It is a front view of a transfer crane to which a power feeding cable storage basket according to the present invention is applied. It is a front view of the conventional cable storage basket.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 5, the transfer crane 11 is formed in a portal shape and normally travels in a direction penetrating the paper surface by four sets of front and rear rubber tires 13 provided on the leg portion 12. Reference symbol Y indicates a container storage zone.

  In addition, the transfer crane 11 is configured such that a trolley 15 traverses on a girder 14 bridged between left and right leg portions 12 and 12. Further, the lifting tool 16 is held by a plurality of wire ropes R drawn from a drum (not shown) on the trolley 15. In addition, power is supplied from the trolley 15 to the hanging tool 16 via the power supply cable 9. Reference numeral C denotes a container for sea transportation, and reference numeral 10 denotes a chassis for container transportation.

  As shown in FIG. 1, the hanger 16 includes a head block 17 and a spreader 18 provided directly below the head block 17. The head block 17 includes a cable storage basket 19 and a wire rope R is wound around sheaves 20 provided at four corners thereof. On the other hand, the spreader 18 includes guide arms 21 that rotate in the vertical direction at the four corners.

  The cable storage basket 19 includes a truncated cone-shaped basket guide portion 23 having a ring-shaped cable entrance 22 at the upper end, and a bottomed cylindrical basket storage portion 24 connected to the lower portion of the basket guide portion 23. ing. The truncated cone-shaped basket guide portion 23 and the bottomed cylindrical basket storage portion 24 are integrally configured by a metal solid round bar 25 assembled in a lattice shape. Note that the basket guide portion 23 and the basket storage portion 24 may be made of metal pipes for weight reduction.

  As shown in FIG. 2, the present invention is characterized in that a ring-shaped roller bracket 27 is rotatably provided immediately above the ring-shaped cable entrance 22. The ring-shaped roller bracket 27 is rotatably supported by a number of support rollers 28 provided at predetermined intervals in the outer circumferential direction. Each support roller 28 includes a pair of upper and lower rollers 29a and 29b.

  On the other hand, the roller bracket 27 has a V-shaped outer peripheral surface, a truncated cone surface 31a above the equator portion 30 which is the maximum diameter portion, and a reverse truncated cone surface 31b below the equator portion 30. It has become. Of the pair of upper and lower rollers 29a and 29b, the upper roller 29a supports the truncated cone surface 31a of the roller bracket 29, and the lower roller 29b supports the inverted truncated cone surface 31b of the roller bracket 29. Yes.

  The pair of upper and lower rollers 29 a and 29 b are rotatably provided on the roller support member 32. The roller support member 32 is attached to the basket guide portion 23 via a plate or bar-like support 33.

  As shown in FIG. 3, the ring-shaped roller bracket 27 has a large number of guide rollers 34 for guiding the power feeding cable installed on the upper surface thereof in a ring shape. At that time, it is preferable that the gap between the adjacent guide rollers 34 and 34 is set so that the feeding cable 9 does not bite into the gap. The guide roller 34 is constituted by a pair of rollers 34a and 34b.

As shown in FIG. 2, an upper ring (also referred to as “auxiliary guide”) 36 having a larger diameter than the ring-shaped roller bracket 27 is provided above the ring-shaped roller bracket 27. The upper ring 36 is attached to the support 33 by a stay 37.
Further, the outermost end of the support member 38 supporting the guide roller 34 is attached to the roller bracket 27 by a bolt 39, but a gap is provided between the head of the bolt 39 and the bottom plate of the support member 38. Therefore, the guide roller 34 rises in the direction of the arrow and comes into contact with the upper ring 36 at the time of abnormality.

  As described above, the power supply cable 9 that supplies power to the hanger 16 suspended from the trolley 15 is housed in a loop in the cable storage basket 19 installed on the hanger 16 so that a snake winds around. ing.

  Thus, when the hanging tool 16 is suspended from the trolley 15, the power supply cable 9 is pulled out from the cable storage basket 19 while rotating in a spiral shape. On the other hand, when lifting the lifting tool 16 toward the trolley 15, the feeding cable 9 is stored in a loop shape in the cable storage basket 19 while rotating in a spiral shape.

  By the way, the roller bracket 27 of the present invention has a ring shape and is significantly lighter than the conventional basket guide portion 2 such as a shade of a desk lamp. When the feeding cable 9 rotates in a spiral shape and contacts the guide roller 34 on the roller bracket 27 when stored in the basket 19, the roller bracket 27 smoothly rotates in the direction of arrow R as shown in FIG. .

  For this reason, the power feeding cable 9 is stored in a loop shape in the cable storage basket 19 without being twisted more than the curl previously applied.

  In addition, when the middle portion of the power supply cable 9 jumps outward from the roller bracket 27 due to a gust of wind or the like, the upper ring 36 provided above the roller bracket 27 acts like a brake. The feeding cable 9 is prevented from flowing out. At this time, the support member 38 of the guide roller 34 rotates in the direction of the arrow, so that the guide roller 34 contacts the upper ring 36 and the rotation of the guide roller 34 is prevented.

  In the above description, the case where the cable storage basket 19 provided with the ring-shaped roller bracket 27 is applied to the transfer crane 11 has been described. However, the present invention can be applied not only to the transfer crane 11 but also to a container crane, for example.

9 Feed Cable 11 Crane 15 Trolley 16 Suspension Tool 19 Cable Storage Basket 27 Roller Bracket 34 Feed Cable Guide Roller

Claims (3)

  A cable storage basket for storing a power supply cable is installed in a suspension suspended from a trolley on a crane, and the power supply cable is stored in the cable storage basket as the suspension is lifted or lowered. A power feeding device for a crane that is fed out from a basket, wherein a ring-shaped roller bracket having a roller group for power feeding cable guide is rotatably installed directly above the cable storage basket. .   A plurality of support rollers in which a ring-shaped roller bracket having a group of rollers for feeding cable guides is rotatably installed directly above the cable storage basket, and the roller bracket is disposed along the outer periphery of the roller bracket. The crane power supply device according to claim 1, wherein the power supply device is supported by the crane.   A ring-shaped roller bracket having a group of rollers for feeding cable guides is rotatably installed directly above the cable storage basket, and the V-shaped outer peripheral surface of the roller bracket extends along the outer periphery of the roller bracket. 3. The crane power supply apparatus according to claim 1, wherein the crane is supported by a plurality of arranged support rollers.

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