JP3238351B2 - Rope drum - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rope drum, and is particularly useful when applied to a rope drum mounted on various cranes such as a container crane.

[0002]

2. Description of the Related Art FIG. 4 is a front view of a trolley of a container crane shown as an example to which a rope drum according to the present invention is applied.

As shown in FIG. 1, a main beam 1 having a box structure of a container crane is supported on a cross beam 2, and traverse rails 3a and 3b are provided on both sides of the main beam 1. On the other hand, the trolley 4 of the container crane is provided with traversing devices 5a and 5b.
b, the wheels 12a, 12 on the traversing rails 3a, 3b
b. Therefore, the trolley 4 is driven by the traversing devices 5a, 5b to drive the traversing rails 3a, 3b.
You can traverse along.

The trolley 4 is provided with a pair of hoisting drums 6a and 6b. Hoisting drums 6a, 6
b, hoisting ropes 7a, 7b such as four wire ropes;
7c and 7d are wound two by two, and the spreader 10 is supported by these hoisting ropes 7a, 7b, 7c and 7d. The spreader 10 is configured to be detachable from the container 11. Accordingly, the container 11 is wound up by the hoisting drums 6a and 6b while being held by the spreader 10, and is transported to a predetermined place by the trolley 4 traversing. 4 is a cable drum installed between the hoisting drums 6a and 6b,
Reference numeral 9 denotes a cable wound around the cable drum 8.

FIG. 5 is a front view of a rope drum conventionally used for a hoisting drum or the like of such a container crane.

[0006] As shown in FIG.
Drum drum 51 for winding the hoisting ropes 7a, 7b
In addition, drum side plates 52a and 52b are integrally provided on both sides of the drum body 51 in the axial direction (left and right directions in the figure). Further, a drum shaft 53a integrated with the drum side plate 52a.
Is connected to a driving device 54, and a drum shaft 53b integral with the drum side plate 52b is rotatably supported by a shaft support device 55. The two hoisting ropes 7a and 7b are clamped at one end on the outer peripheral surface of the opposite drum drum at the left end portion of the drum drum 51 in the drawing by clamp metal fittings 56, respectively, and in the same direction around the drum drum 51. And the other end extends downward from the right end of the drum body 51 in parallel with the right end of the drum body 51 in the drawing.

Therefore, in the rope drum 50, the driving rope 54 rotates the drum body 51 to one side, so that the hoisting rope 7 wound around the drum body 51 is rotated.
The hoisting ropes 7a, 7b, which are fed downward by rotating the drum body 51 to the other side by the driving device 54, are wound around the drum body 51 again.

[0008]

Generally, there are two types of rope drums. One is to wind the rope in a single step and the other is to wind the rope in layers. The rope drum of a crane used frequently and continuously, such as a container crane, is used. In order to check the condition of the hoisting rope on the rope drum on a daily basis, it is usual to adopt a one-step flat winding structure like the above-mentioned conventional rope drum 50.

However, in the above-described conventional rope drum 50, the hanging load applied to the hoisting ropes 7a, 7b cannot be supported only by clamping one end of the hoisting ropes 7a, 7b with the clamp fitting 56. As shown in FIG. 5, hoisting ropes 7a and 7
The first three turns of b are used as a rope winding part 57, and the frictional force between the hoisting ropes 7a, 7b and the outer peripheral surface of the drum body 51 in the rope winding part 57 is added to the above-mentioned supporting force to support the hanging load. I am able to do it. In addition to the provision of the rope unwinding portion 57 on the drum body 51, the winding ropes 7a and 7b of a length necessary for cargo handling (lifting and lowering of the suspended load) are further wound around the drum body 51. It is necessary to provide a rope winding portion 58 for cargo handling.

For this reason, it is necessary to lengthen the drum body 51 by the length of the rope winding portion 57. Or, drum drum 51
When the length is limited, the diameter of the drum body 51 needs to be increased.

In addition, it is inevitable that the size of the rope drum 50 increases as the size of the crane increases and the number of hoisting lifts increases.

Further, since it is desirable that the trolley of the crane be made as small as possible, it is a serious problem to secure a large space for the rope drum on the trolley.

Accordingly, it is a first object of the present invention to provide a rope drum which can be reduced in size and weight in view of the above prior art.

Another object of the present invention is to provide a rope drum in which the rope can be easily wound in the rope winding section.

It is a third object of the present invention to provide a rope drum which can uniformly load a rope when a plurality of ropes are wound.

[0016]

According to a first aspect of the present invention, there is provided a rope drum having a drum body for winding a rope, wherein the rope drum is fixed to an axial side of the drum body. A drum side plate, an outer drum side plate facing the inner drum side plate and having an interval between opposing surfaces equal to or slightly larger than the rope diameter, and provided at a central portion in the opposing surface; A rope wrapping portion configured to include a rope wrapping member having a smaller diameter than the drum body and a rope fixing member that fixes one end of the rope in or near the rope wrapping member,
Provided on the axial side of the drum body as a rope scraping part ,
The rope one end fixed by the rope fixing member, in the rope lap-wound portion of <br/> opposing plane as the rope捨巻unit, so as to wind piled in a row around the rope winding member Discard one end of the rope
The one end of this discarded rope
While being in contact with the opposing surface, it is
Necessary to supplement the supporting force of the suspended load by the
After having obtained a sufficient frictional support force, it is configured to be guided to the drum body side.

According to a second aspect of the present invention, there is provided a rope drum according to the first aspect, wherein the rope wrapping member is a hollow member, and the rope wrapping member is provided from inside to outside. An opening communicating with the rope, and the rope fixing member is provided inside the rope wrapping member, the rope fixed at one end by the rope fixing member,
After being guided to the outside of the rope wrapping member from the opening, the rope wrapping member is wound around the rope wrapping member in a line in the facing surface.

According to a third aspect of the present invention, there is provided a rope drum according to the first aspect of the present invention, wherein a cut-out portion or a hole for transferring a rope is point-symmetrical with each other on an outer peripheral portion of the inner drum side plate. And a rope wrapping member is a hollow member, and the rope wrapping member is provided with an opening communicating from the inside to the outside with respect to each other. The rope fixing members are provided at a plurality of positions so as to have a symmetrical positional relationship, and the rope fixing members are disposed at a plurality of positions inside the rope winding member so as to have a point symmetrical positional relationship with each other. Guide the plurality of ropes each having one end fixed to the outside of the rope wrapping member in order from the opening, and wrap the rope around the rope wrapping member in the facing surface. Direction wound lap in a row, characterized by being configured to direct to each of said drum shell side in order from Kiridoshi portion or a hole for the rope migration.

[0019]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a front view of a rope drum according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG.
FIG. 3 is an enlarged perspective view as viewed in the direction of arrow III in FIG. 1.

<Structure> As shown in FIG. 1, a rope drum 20 according to the present embodiment has a drum body 21 around which hoisting ropes 7a and 7b such as wire ropes are wound. A double drum side plate 22 and a drum side plate 23 are provided on both sides in the axial direction (left and right direction in the figure). The drum side plate 23 is a conventional drum side plate 52.
a (see FIG. 5), and is integrally provided on the left side of the drum cylinder 21 in the figure.

On the other hand, the double drum side plate 22 corresponds to FIGS.
As shown in FIG. 2, the inner drum side plate 24 is fixed to the right side of the drum body 21 in the drawing, and the outer drum side plate 25 is provided so as to face the inner drum side plate 24. Inner drum side plate 24 and outer drum side plate 2
5 is fixed by a bolt 27 or the like via an interposition member 35, and a hoisting rope 7a, 7b is provided between the inner drum side plate 24 and the outer drum side plate 25 (that is, between the opposing surfaces 24a, 25a).
Has an interval 26 which is slightly wider than the diameter.

Further, as shown in FIG. 2, cutout portions 31a and 31b for rope transfer are formed at two upper and lower portions of the outer peripheral portion of the inner drum side plate 24 in the drawing.
These rope-transfer cut-out portions 31a and 31b are in a point-symmetric positional relationship with each other, and the bottom surface thereof is flush with the outer peripheral surface of the drum body 21.

The opposed surfaces 24a, 25 of the double drum side plate 22
A rope wrapping member 33 having a diameter smaller than that of the drum body 21 is fixed to the inner drum side plate 24 at a central portion in a. The rope wrapping member 33 has a pair of half-ring-shaped pieces 33a and 33b opposed to each other, and a pair of openings 33c and 33d are point-symmetrical to each other on both left and right sides in the drawing. It is provided as follows.

A pair of clamp fittings 32a and 32b are provided inside the rope wrapping member 33. These clamp fittings 32a, 32b are arranged at two upper and lower positions in the figure so as to sandwich the drum shaft 28b, and have a point-symmetrical positional relationship with each other. One end of the hoisting ropes 7a, 7b is opposed to the inner drum side plate. 24 is fixed to the facing surface 24a.

The clamps 32a, 32
The ropes 7a and 7b, one ends of which are fixed by 2b, are respectively connected to the rope winding members 3 in order from the openings 33c and 33d.
3 is wound around the rope wrapping member 33 in the same direction in the opposing surfaces 24a and 25a in a line in the same direction until the diameter becomes the same as the drum body 21. It is sequentially guided to the drum cylinder 21 side.

That is, a double drum side plate 22 composed of an inner drum side plate 24 and an outer drum side plate 25, a rope wrapping member 33 composed of half ring-shaped pieces 33a and 33b, and clamp metal fittings 32a and 32b. Part 36
This rope overlap winding portion 36 is a rope winding portion corresponding to the conventional rope winding portion 57 (see FIG. 5).

The drum shaft 2 integral with the drum side plate 23
8a is connected to a driving device 29, and a drum shaft 28b integral with the inner drum side plate 24 is rotatably supported by a shaft support device 30 through the outer drum side plate 25. Therefore,
By rotating the drum body 21 to one side by the driving device 29, the hoisting ropes 7 a and 7 b wound around the drum body 21 are extended downward, and the driving device 29 is rotated.
By rotating the drum cylinder 21 to the other,
The hoisting ropes 7a and 7b that are fed downward are wound around the drum body 21 again.

<Operation / Effect> The rope drum 2 having the above structure.
According to 0, the two hoisting ropes 7a and 7b are wound in the following procedure.

That is, as shown in FIG.
a and 7a are fixed to the opposing surface 24a of the inner drum side plate 24 by clamps 32a and 32b, respectively, and these hoisting ropes 7a and 7b are respectively roped in order from the openings 33c and 33d of the rope winding member 33. It is guided to the outside of the winding member 33. Next, as shown in FIGS. 1 and 3, the outer drum side plate 25 is fixed to the inner drum side plate 24 with bolts 27 or the like at intervals 26 slightly larger than the diameters of the hoisting ropes 7a and 7b. 24a, 25a
Inside, it is wound in a line around the rope winding member 33 in the same direction until it has the same diameter as the drum body 21. That is, one end side of the hoisting ropes 7a and 7b is discarded and wound around the rope overlapping winding portion 36.

Then, the hoisting ropes 7a, 7b are sequentially guided to the drum body 21 side from the rope transfer cut-out portions 31a, 31b of the inner drum side plate 24, respectively, and are wound around the drum body 21 in parallel in the same direction. Then, the other ends of the hoisting ropes 7a and 7b are extended downward from the left end in the drawing.

Therefore, in the rope overlapped winding portion 36, the hoisting ropes 7a, 7b are wrapped and wound multiple times while contacting the opposing surfaces 24a, 25a, so that the clamp fitting 32 is provided.
The frictional supporting force necessary to supplement the supporting force of the hanging load by a and 32b is obtained. Since the rope wrapping portion 36 is configured to wrap the hoisting ropes 7a and 7b in a line, the rope wrapping portion 36 is shorter than the conventional rope scraping portion 57 (see FIG. 5), and the drum body 21 is used for cargo handling. It is only necessary to have a length or diameter enough to wind the necessary lengths of the hoisting ropes 7a and 7b, so that the length is shorter by the rope scraping portion 57 than the conventional drum trunk 51 (see FIG. 5). Or smaller in diameter. Therefore, the rope drum 20 can be made smaller and lighter than the conventional rope drum 50 (see FIG. 5).

Moreover, the distance 26 between the opposing surfaces 24a, 25a
Is slightly larger than the diameter of the hoisting ropes 7a, 7b, that is, by setting the interval 26 so as to leave a minute gap with respect to the diameter of the hoisting ropes 7a, 7b, Prevent crush deformation, hoisting rope 7a,
7b can be prevented from being damaged.

The rope wrapping member 32 is a hollow member, and a clamp fitting 32 is provided inside the rope wrapping member 32.
a, 32b, the clamp fittings 32a, 3
2b does not hinder the winding of the hoisting ropes 7a, 7b around the rope winding member 32, and the winding ropes 7a, 7b can be smoothly and reliably wound around the rope winding member 32. .

The number of winding ropes 7a and 7b (2
Book) corresponding to the two rope transition through-sections 31a,
31b, openings 33c and 33d and clamp fitting 32
The two winding ropes 7a and 7b are wound uniformly (that is, in the same length and in the same shape) in the rope overlapping winding part 36 by providing the a and 32b so as to have a point symmetrical positional relationship with each other. be able to. For this reason, the winding can be efficiently performed, and the frictional supporting force equal to that of the hoisting rope 7a and the hoisting rope 7b is generated, and the frictional supporting force is biased to one of the hoisting rope 7a and the hoisting rope 7b. Therefore, it is possible to prevent any one of the hoisting ropes 7a and 7b from being deteriorated earlier.

In the above description, the case where two hoisting ropes are wound around the drum body has been described as an example. However, the present invention is not limited to this, and the number of hoisting ropes may be one or three or more. There may be. When three or more hoisting ropes are wound, similarly to the above, the number of rope transfer through-holes, openings, and rope fixing members (clamp fittings, etc.) corresponding to the number of hoisting ropes are respectively point-symmetrical to each other. It is desirable to provide them in a positional relationship.

The shape of the rope transfer through-hole may be any shape as long as the hoist rope can be transferred from the opposing surface to the drum body side. Alternatively, instead of the cut-out portions, holes for transferring ropes may be formed in the inner drum side plate 24, and the hoisting ropes 7a and 7b may be guided to the drum body 21 from these holes. Further, the outer diameter of the inner drum side plate 24 is
By making the outer diameter approximately the same as the outer diameter of the inner drum side plate 24, the winding ropes 7a and 7b can be moved from an arbitrary position on the outer peripheral portion of the inner drum side plate 24 to the drum body 21 side without forming a penetrating portion or a hole for rope transfer. It can be guided.

That is, the shape of the outer peripheral portion of the inner drum side plate 24 is the same as that of the rope-transfer cut-through portion 3 shown in FIG.
The shape is not necessarily limited to the shape having 1a, 31b, but may be any shape that can guide the hoisting ropes 7a, 7b from the inside of the facing surfaces 24a, 25a to the drum barrel 21 side.

The shape of the rope wrapping member may be any shape as long as it allows the winding rope to be wrapped around it. In addition, it is desirable that the shape of the rope fixing member be hollow so that an opening is provided from the inside to the outside and the rope fixing member can be disposed inside.

In the above description, the rope wrapping member 33 and the drum shaft 28b are separate members. However, the present invention is not limited to this, and the rope wrapping member and the drum shaft may also be used.

[0041]

As described above in detail with the embodiments of the present invention, the rope drum according to the first invention is a rope drum having a drum trunk for winding a rope, in the axial direction of the drum trunk. An inner drum side plate fixed to the portion, an outer drum side plate provided so as to have an interval of an opposing surface that is opposite to the inner drum side plate and is equal to or slightly larger than the rope diameter; A rope wrapping portion comprising a rope wrapping member having a smaller diameter than the drum body provided in the center portion, and a rope fixing member for fixing one end of the rope to the rope wrapping member or in the vicinity thereof, The rope, which is provided on the axial side of the drum body as a winding part and whose one end is fixed by the rope fixing member, is connected to the rope as the rope winding part.
In the opposing surface of the lap winding portion, the rope is wound in a line around the rope wrapping member .
By discarding one end, this discarded roll
One end of the loop comes in contact with the opposite surface and wraps multiple
To support the supporting force of the suspended load by the rope fixing member.
After the friction supporting force necessary for filling is obtained, the friction supporting force is guided to the drum body side.

Therefore, according to the rope drum of the first invention, in the rope overlapping winding portion, the rope is wound up multiple times while contacting the opposing surface, thereby replenishing the load supporting force of the rope fixing member. The required frictional supporting force is obtained. Since the rope lap winding section is configured to wrap the rope in a line, the rope is shorter than the conventional rope discarding section, and the drum body has a length sufficient to wind a rope of a length necessary for cargo handling or As long as it has a diameter, it becomes shorter or smaller in diameter than the conventional drum body by the amount of the rope winding part. For this reason, the rope drum of the first invention can be made smaller and lighter than the conventional rope drum.

In addition, when the distance between the opposing surfaces is slightly larger than the diameter of the rope, that is, when the distance is set so as to leave a small gap with respect to the diameter of the rope, the rope cross-section caused by the tightening may be reduced. It is possible to prevent crushing deformation of the rope and prevent damage to the rope.

The rope drum according to the second invention is the rope drum according to the first invention, wherein the rope wrapping member is a hollow member, and the rope wrapping member is provided with an opening communicating from the inside to the outside. After the rope fixing member is provided inside the rope wrapping member, and the rope, one end of which is fixed by the rope fixing member, is guided from the opening to the outside of the rope wrapping member, Wherein the wire is wound around the rope winding member in a line.

Therefore, according to the rope drum of the second invention, since the rope wrapping member is a hollow member and the rope fixing member is provided inside the rope wrapping member, the rope fixing member wraps the rope. The rope can be smoothly and reliably wound around the rope winding member without obstructing the winding around the winding member.

A rope drum according to a third aspect of the present invention is the rope drum according to the first aspect of the present invention, wherein a cut-out portion or a hole for rope transfer is provided on the outer peripheral portion of the inner drum side plate so as to have a point-symmetric positional relationship with each other. The rope wrapping member is a hollow member provided at a plurality of locations on the outer peripheral portion of the inner drum side plate, and the rope wrapping member has openings that communicate from the inside to the outside so as to have a point-symmetric positional relationship with each other. At a plurality of positions, and the rope fixing members are disposed at a plurality of positions inside the rope wrapping member so as to have a point-symmetric positional relationship with each other, and one end is fixed by each of these rope fixing members. A plurality of the ropes are guided to the outside of the rope wrapping member in order from the opening, and are wound in a line in the same direction around the rope wrapping member in the facing surface. Characterized by being configured to direct the Kiridoshi portion or a hole for the rope shift to each of the drum cylinder side.

Therefore, according to the rope drum of the third aspect of the invention, the plurality of rope transfer through-holes, the openings, and the rope fixing members are respectively point-symmetrical to each other in accordance with the number (a plurality) of ropes. With such a configuration, a plurality of ropes can be uniformly wound (that is, in an equal length and an equal shape) in the rope overlapping winding portion. For this reason, while being able to wind efficiently, the same frictional supporting force is generated in each rope, and the frictional supporting force is biased to any of the ropes, so that any of the ropes is deteriorated earlier. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a front view of a rope drum according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is an enlarged perspective view taken in the direction of arrow III in FIG. 1;

FIG. 4 is a front view of a trolley part of a container crane shown as an example to which the rope drum of the present invention is applied.

FIG. 5 is a front view of a rope drum conventionally used for a hoisting drum or the like of a container crane.

[Explanation of symbols]

 7a, 7b Hoisting rope 20 Rope drum 21 Drum trunk 22 Double drum side plate 23 Drum side plate 24 Inner drum side plate 25 Outer drum side plate 24a, 25a Opposing surface 26 Distance between opposing surfaces 27 Bolt 28a, 28b Drum shaft 29 Drive device 30 axis Supporting devices 31a, 31b Rope transition cut-out portions 32a, 32b Clamp fittings 33 Rope wrapping members 33a, 33b Half ring-shaped pieces 33c, 33d Openings 34 Intermediate members 36 Rope wrapping portions

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B66D 1 / 30,1 / 34

Claims (3)

(57) [Claims] 1. A rope drum having a drum body for winding a rope, wherein: an inner drum side plate fixed to an axial side portion of the drum body; and an opposite to the inner drum side plate and equal to or equal to the rope diameter. An outer drum side plate provided so as to have an interval between the opposing surfaces slightly larger than the diameter, a rope wrapping member having a smaller diameter than the drum body provided at a central portion in the opposing surface; In the vicinity, a rope lap winding portion comprising a rope fixing member for fixing one end of the rope is provided on the axial side of the drum body as a rope scraping portion, and one end is fixed by the rope fixing member. rope, said in the rope lap-wound portion of <br/> facing plane of the rope捨巻unit, before so as to wind piled in a row around the rope winding member Winding discarded one end of the rope
The one end of this discarded rope
While being in contact with the opposing surface, it is
Necessary to supplement the supporting force of the suspended load by the
A rope drum, wherein the rope drum is guided to the drum body side after obtaining a high frictional supporting force . 2. The rope drum according to claim 1, wherein the rope wrapping member is a hollow member, and the rope wrapping member is provided with an opening communicating from the inside to the outside. After the rope fixing member is provided inside, and the rope whose one end is fixed by the rope fixing member is guided from the opening to the outside of the rope winding member, the rope winding member is provided in the facing surface. A rope drum characterized in that it is constructed so as to be wound in a line around a rope. 3. The outer peripheral surface of the inner drum side plate according to claim 1, wherein the outer peripheral portion of the inner drum side plate has a cut-out portion or a hole for rope transfer in a point symmetrical positional relationship with each other. In addition to providing the rope wrapping member at a plurality of locations, the rope wrapping member is a hollow member, and the rope wrapping member is provided at a plurality of locations such that openings communicating from the inside to the outside have a point symmetrical positional relationship with each other, In addition, the rope fixing members are disposed at a plurality of positions inside the rope winding member so as to have a point-symmetric positional relationship with each other, and a plurality of the ropes each having one end fixed by each of the rope fixing members. From the opening to the outside of the rope wrapping member in order, and wound in a row in the same direction around the rope wrapping member in the opposing surface, for the rope transfer. A rope drum, wherein the rope drum is configured to be guided to the drum body side in order from a through portion or a hole.