JPH10338420A - Rotational supporting device for barrel winding drum - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily attach a barrel winding drum to a supporting shaft in the automatic alignment state even in a case where the hole diameters of set holes provided on the barrel drum have variations. SOLUTION: In a rotational supporting device for a barrel winding drum, supporting shafts 10, 21 are rotatably provided on a fixed table 5 and a moving table 15. Respective cutting blades 11, 22 are circumferentially attached on the outer peripheral sides of the supporting shafts 10, 21 so as to be separated from each other, and the cutting edges of respective cutting blades 11, 12 are inclined at the taper angle approximately corresponding to the taper parts formed on the tips of the supporting shafts 10, 21. A barrel winding drum 1 is rotatably supported between the supporting shafts 10, 21 by fitting the supporting shafts 10, 21 into respective set holes 3 of the barrel winding drum 1 in a state where the cutting edges of respective cutting blades 11, 21 bite the peripheries of respective set holes 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a barrel-wound drum rotation support device suitably used for winding a new wire rope around a rope winch drum mounted on a construction machine such as a hydraulic crane.

[0002]

2. Description of the Related Art In general, a rope winch is mounted on a construction machine such as a hydraulic crane, and a wire rope is wound around a drum of the rope winch. By operating the winch, the drum is rotated in the forward and reverse directions when performing a load operation or the like, and the wire rope is wound or unwound on the drum.

[0003] A new wire rope used for exchanging the wire rope or the like is carried in a state where it is wound in advance on a barrel drum made of a wooden material.

In Japanese Patent Application Laid-Open No. 8-40693 and the like, a support shaft is rotatably mounted on a support base provided on a base, and the support shaft is fitted into a set hole provided in a barrel drum. Accordingly, an apparatus for rotatably supporting the barrel winding drum is disclosed.

In such prior art, the tip of the wire rope wound in advance on the barrel drum is pulled out at the time of replacement of the wire rope, and the tip of the pulled wire rope is pulled out of a rope winch such as a hydraulic crane. Hook on the side.
Then, by rotating the drum on the rope winch side in this state, the wire rope is sent out from the barrel-wound drum, and the wire rope is wound on the drum on the rope inch side under tension. I have to.

[0006]

In the prior art described above, since the barrel drum is formed of a wooden material, the diameter of the set hole varies even if the barrel drum has the same size. In addition, if a plurality of types of barrel-wound drums are set on the same support base, the setting hole of the barrel-wound drum and the outer diameter of the support shaft do not match, and rattling may occur between the two. .

[0007] When the wire rope is wound from the barrel winding drum side to the rope winch drum side in a state where such rattling is left, the rotation of the barrel winding drum becomes unstable. There is a problem that the wire rope vibrates greatly between the barrel winding drum and the rope winch, and it becomes difficult to keep the tension to be applied to the wire rope constant.

The present invention has been made in view of the above-mentioned problems of the prior art, and the present invention allows a wooden barrel winding drum to be assembled in a state where the drum is self-centered with respect to a support table, and the winding of a wire rope. It is an object of the present invention to provide a barrel-wound drum rotation support device that stabilizes the rotation of a barrel-wound drum at the time of take-out or unwinding and can greatly improve workability and the like when setting the barrel-wound drum. .

[0009]

In order to solve the above-mentioned problems, according to the first aspect of the present invention, there is provided a barrel-wound drum formed of a wooden material and having a set hole at each of central portions at both axial ends. First and second supports provided so as to sandwich the barrel winding drum from both sides in the axial direction, and provided with support shafts rotatably supporting the barrel winding drum in a state fitted in the respective set holes. A table and a set of barrel winding drums attached to at least one of the spindles provided on the first and second support bases to maintain the barrel winding drum in a self-centering state. A barrel drum rotating support device comprising a tapered centering blade biting around the hole is employed.

[0010] According to the above configuration, the tapered centering blade provided on at least one of the first and second support bases can be bitten around the set hole of the barrel winding drum. With this centering blade, the barrel winding drum can be automatically centered with respect to the support shaft. And, with the backlash between each set hole of the barrel winding drum and each support shaft suppressed,
The barrel winding drum can be stably rotated around each support shaft.

According to the second aspect of the present invention, one of the first and second support bases provided on both sides of the barrel winding drum in the axial direction is configured as a fixed base fixed on a base. The support table on the other side is constituted by a movable table movably provided on the base so as to approach and separate from the fixed table.

Thus, when the barrel winding drum is mounted between the fixed base and the movable base via each support shaft, the movable base is first moved on the base so as to be separated from the fixed base.
Next, with the barrel winding drum disposed between the moving table and the fixed table, the moving table is moved to approach the fixed table. And, by gradually narrowing the distance between the fixed base and the movable base, each support shaft can be easily fitted into each set hole. The winding drum can be held in a state where the winding drum is automatically aligned between the respective spindles via the alignment blade.

Further, according to the third aspect of the present invention, a tapered portion for guiding the support shaft toward a set hole of the barrel winding drum is formed at a tip end side of the support shaft, and the centering blade is provided with a taper portion. It is provided with a plurality of cutting blades provided at intervals in the circumferential direction of the support shaft and projecting radially outward with a taper angle substantially corresponding to the tapered portion.

Thus, when the support shaft is fitted into the set hole of the barrel winding drum, the entire support shaft is formed by the tapered portion and the respective cutting blades having a taper angle substantially corresponding to the tapered portion. It can be easily guided into each set hole. In addition, at this time, each cutting blade can be cut into a plurality of locations around the set hole at intervals, and the barrel winding drum can be firmly attached to each support shaft via each cutting blade.

Further, according to the present invention, a cylindrical cover for covering the centering blade from the outside is detachably provided on the outer peripheral side of the support shaft, and another centering is provided on the outer peripheral side of the cylindrical cover. The blade is provided integrally.

Accordingly, when a barrel winding drum having a large set hole diameter is rotatably supported, a cylindrical cover is attached to the outer peripheral side of the spindle to replace the centering blade of the spindle. The other centering blade of the cylindrical cover can be reliably cut into the periphery of the set hole, so that the barrel winding drum can be automatically centered between the spindles via the other centering blade. It can hold and stabilize the rotation even with a large barrel wound drum.

[0017]

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

FIGS. 1 to 10 show a first embodiment of the present invention.
3 shows a rotation support device for a barrel-wound drum according to the embodiment of FIG.

In FIG. 1, reference numeral 1 denotes a barrel-wound drum around which a new wire rope 2 or the like is wound. The barrel-wound drum 1 is formed as a hollow cylindrical body made of a wooden material as shown in FIG. . The barrel-wound drum 1 has a cylindrical portion 1A around which a new wire rope 2 is wound in a multi-layer winding state, and a larger diameter than the cylindrical portion 1A, and both ends in the axial direction of the cylindrical portion 1A. And a disk portion 1B as a closing plate fixed to the side.

At the center of each disk portion 1B, set holes 3 and 3 are formed as circular holes, into which support shafts 10 and 21 described later are fitted. The diameter of each set hole 3 is set to, for example, about 50 to 85 mm. However, depending on the size of the barrel drum 1, the hole diameter is about 130 to 14 as in a setting hole 3 'described later.
Some are set to about 0 mm.

The barrel-wound drum 1 is disposed at a position at a predetermined distance from a rope winch (not shown) mounted on a hydraulic crane. Pulled out to the side.

Reference numeral 4 denotes a base constituting a base of the rotary support device, and reference numeral 5 denotes a fixed base serving as a first support base provided on the base 4 and located on one axial side of the barrel drum 1. As shown in FIGS. 1 and 2, the fixing base 5 includes a leg 5A and a support plate 5B provided on the leg 5A.
And a bearing portion 5C or the like provided on the support plate 5B and rotatably supporting the rotary shaft 6 forming a part of the support shaft 10. The lower end of the leg portion 5A is provided with a bolt ( (Not shown) and the like.

Reference numeral 7 denotes a rotary plate provided integrally with the rotary shaft 6 via disk-shaped mounting plates 8 and 9, and this rotary plate 7
And the mounting plates 8 and 9 are formed in a disk shape as shown in FIG.
It is fixed via bolts or the like between them. And the rotating plate 7
A plurality of abutment pins 7A spaced apart in the circumferential direction
7A,... Are integrally mounted, and these butting pins 7A
The distal end has a substantially conical pin tip and bites into the disk portion 1B of the barrel winding drum 1. The rotating plate 7
One of the mounting plates 8, 9 for sandwiching the shaft is integrally provided on the tip end side of the rotating shaft 6, and the other mounting plate 9 is integrally provided with a support shaft 10.

Reference numeral 10 denotes a fixed-side support shaft rotatably provided on the fixed base 5 via a bearing portion 5C or the like.
Is formed with an outer diameter substantially corresponding to the setting hole 3 of the barrel-wound drum 1 as shown in FIG. 4 and FIG. A substantially frusto-conical tapered portion 10B extends so as to gradually reduce the diameter from the distal end side of the shaft portion 10A. 6, the outer peripheral surface of the tapered portion 10B is formed as a tapered surface obliquely inclined at a constant inclination angle, as shown in FIG. When fitted (moored) in the set 3, the set hole 3 is guided smoothly toward the support shaft 10.

Here, on the outer peripheral side of the shaft portion 10A, FIG.
As shown in FIG. 3, mounting grooves 10C, 10C,... Which are elongated in the axial direction of the support shaft 10 with a certain groove depth are formed. The mounting grooves 10C are spaced at equal intervals in the circumferential direction of the shaft portion 10A, and the below-described cutting blades 11 are mounted in the mounting grooves 10C.

The support shaft 10 rotates integrally with the rotary shaft 6 when the mounting plate 9 is mounted together with the rotary plate 7 on the mounting plate 8 via bolts (not shown). . Further, the support shaft 10 is fitted into the set hole 3 via each cutting blade 11, and the support shaft 2 on the movable table 15 side described later.
1 and the barrel winding drum 1 is rotatably supported.

Numerals 11, 11,... Denote cutting blades as aligning blades integrally provided on the outer peripheral side of the support shaft 10. These cutting blades 11 are, for example, as shown in FIGS. It is formed by processing a hard metal plate made of speed tool steel (SKH) or the like into a substantially trapezoidal shape, and its obliquely inclined end forms a cutting edge 11A having a substantially triangular cross section. As shown in FIG. 6, each cutting edge 11A extends obliquely so as to protrude outward in the radial direction of the support shaft 10 with a taper angle (inclination angle) substantially corresponding to the tapered portion 10B of the support shaft 10. . Further, the base ends of the cutting blades 11 are integrally fixed in the respective mounting grooves 10C of the support shaft 10 by welding or the like, and are arranged at intervals in the circumferential direction of the support shaft 10.

Here, when the support shaft 10 is fitted into the set hole 3, the respective cutting blades 11 bite into the periphery of the set hole 3 by substantially equal depths as shown in FIG. Thereby, the setting hole 3 is self-aligned with respect to the support shaft 10, and in this state, the barrel winding drum 1 is stopped from rotating on the support shaft 10 through the respective cutting blades 11.

The self-alignment means that when the barrel drum 1 is set between the spindles 10 and 21, the rotation center of the barrel drum 1 and the rotation centers of the spindles 10 and 21 are slightly shifted. When the spindles 10 and 21 are pushed into the respective set holes 3 of the barrel drum 1, the rotating center of the barrel drum 1 is adjusted by the respective cutting blades 11 and the respective cutting blades 22 to be described later. It is referred to as being guided so as to coincide with the rotation center.

Reference numeral 12 denotes a hydraulic motor mounted on the fixed base 5, and the hydraulic motor 12 is provided with a speed reducer 13 and the like.
The output shaft is connected to the rotation shaft 6 via a coupling 14 or the like. The hydraulic motor 12 transmits rotational force to the barrel-wound drum 1 via the rotary shaft 6, the rotary plate 7, and the support shaft 10 by being rotationally driven by external supply of pressure oil. The hydraulic motor 12 is provided with a relief valve (not shown) and the like. The relief valve is used when the barrel drum 1 is forcibly rotated in the direction of arrow A shown in FIG. 12, a hydraulic brake is generated to apply a resistance (braking force) when the barrel winding drum 1 is rotated in the direction of arrow A.

Reference numeral 15 denotes a movable table serving as a second support table which is located on the other axial side of the barrel winding drum 1 and is movably provided on the base 4 via a pair of rails 16, 16. The base 15 is configured substantially the same as the fixed base 5,
5A and a support plate 15B. However, bearing portions 15C, 15 rotatably supporting a rotary shaft 17 forming a part of the support shaft 21 on the support plate 15B.
D is provided. Rollers 15E and 15E are provided at the lower ends of the legs 15A at positions corresponding to the rails 16.
E,... Are rotatably mounted.

The movable table 15 is disposed so as to sandwich the barrel winding drum 1 from both sides in the axial direction between the movable table 15 and the fixed table 5, and moves on each rail 16 via each roller 15E. It is configured to approach and separate from the fixed base 5. The moving table 15 is positioned on each rail 16 via bolts (not shown) or the like.

Reference numeral 18 denotes a rotary plate integrally provided via mounting plates 19 and 20. The rotary plate 18 is formed in the same manner as the rotary plate 7, and has respective abutting pins 18A. The rotating plate 18 is fixed between the mounting plates 19 and 20 via bolts (not shown) or the like.
Cut into the disk portion 1B of the barrel winding drum 1. Also,
One of the mounting plates 19, 20 for holding the rotating plate 18 is provided integrally with the tip end of the rotating shaft 17, and the supporting shaft 21 is provided integrally with the other mounting plate 20.

Reference numeral 21 denotes a movable-side support shaft rotatably provided at the upper end side of the movable base 15, and this support shaft 21 is formed substantially in the same manner as the support shaft 10 as shown in FIGS. , Shaft portion 21A, tapered portion 21B and each mounting groove 2
1C. The support shaft 21 is fitted into the set hole 3 via each cutting blade 22 described later, and the support shaft 21 is fitted into the set hole 3 of the barrel drum 1 as shown by a dashed line in FIG. When the mooring is performed (mooring), the entire support shaft 21 is guided toward the set hole 3. The support shaft 21 has a mounting plate 20 integrally mounted on the mounting plate 19 side together with the rotary plate 18 via bolts (not shown) or the like.

Are cutting blades provided integrally on the outer peripheral side of the support shaft 21 as aligning blades. Each of the cutting blades 22 is also provided with the cutting blade 11 as shown in FIGS. It is formed similarly and has each cutting edge 22A. Further, the base end side of each of the cutting blades 22 is integrally fixed to each of the mounting grooves 21C of the support shaft 21 by welding or the like, respectively.
The support shafts 21 are arranged at intervals in the circumferential direction. Each cutting blade 22 cuts into the periphery of the setting hole 3 by a substantially equal depth, thereby connecting the barrel winding drum 1 to the support shaft 21.
Is maintained in a self-aligned state with respect to That is, when the barrel drum 1 is set between the spindles 10 and 21, the center of rotation of the barrel drum 1 and the center of rotation of the spindles 10 and 21 coincide with each other, and the automatic centering is performed.

Reference numeral 23 denotes a fine-adjustment advance / retreat mechanism for moving the support shaft 21 in the axial direction on the movable table 15. The advance / retreat mechanism 23 has an operation handle 23A.
By rotating A in the forward and reverse directions, the rotating shaft 17 is slidably displaced in the axial direction with respect to the bearing portions 15C and 15D, and the support shaft 21 is advanced and retracted into the set hole 3. .

Numeral 24 denotes a cylindrical cover detachably provided on the outer peripheral side of the support shafts 10 and 21. The cylindrical cover 24 has a set hole 3 'having a diameter of, for example, approximately 130 to 30, as shown in FIG.
This is used for a large barrel-wound drum 1 ′ having a size of about 140 mm. And, this cylindrical cover 24
Is formed with an outer diameter corresponding to the set hole 3 ′ provided in the disk portion 1 B ′ of the barrel winding drum 1 ′, and a cylindrical portion 24 A whose base end is in contact with an end face of the mounting plate 9 and the like, and this cylindrical portion 24 A. Tapered portion 24 whose diameter is gradually reduced in the axial direction with a taper angle substantially corresponding to the tapered portion 10B of the support shaft 10 from the distal end side of the shaft 24.
B, and an annular projection 24 projecting radially inward from the distal end side of the tapered portion 24B and having the inner peripheral side fitted to the support shaft 10.
C.

Here, the tapered portion 24B of the cylindrical cover 24
The cylindrical cover 2 is similar to the tapered portion 10B of the support shaft 10 and the like.
The whole 4 is guided toward the inside of the set hole 3 '.
The cylindrical cover 24 is disposed so as to cover each cutting blade 11 from the outside, and in this state, is inserted into the set hole 3 '. Therefore, in this case, the barrel winding drum 1
It is stopped by the rotating plate 7 only through A. When the barrel drum 1 is detached from the support shafts 10, 21, the cylindrical cover 24 is attached to the support shafts 10, 21, and the like, thereby functioning as a protective cover for protecting the cutting blades 11, 22 from the outside. It also has.

The apparatus for supporting rotation of a barrel-wound drum according to the present embodiment has the above-described configuration.
A method of attaching the base between the fixed base 5 and the movable base 15 will be described.

First, as shown in FIG. 8, each rail 16 is moved in the direction of arrow B so that the movable table 15 is separated from the fixed table 5.
And a small crane (not shown)
The barrel wound drum 1 is lifted by the hook 25 or the like, and is disposed between the fixed base 5 and the movable base 15 with the barrel wound drum 1 kept horizontal.

Next, the barrel winding drum 1 is moved together with the hook 25 in the direction of arrow C in FIG. 8 toward the fixed base 5 to support the leading end of the set hole 3 as shown in FIG. It is moored (fitted) to the shaft 10 in advance. Here, the support shaft 10
Has a tapered portion 10B at the tip end, so that the support shaft 10
The whole can be easily guided into the set hole 3 by the tapered portion 10B.

Next, the movable table 15 is moved along each rail 16 in the direction of arrow C so as to approach the fixed table 5 side, so that the tip end side of the support shaft 21 is indicated by a dashed line in FIG. Fit into the set hole 3 as shown. Then, in this state, the movable table 15 is strongly pushed (pressed) toward the fixed table 5 side.
Then, the support shafts 10 and 21 are pushed into the respective set holes 3.

Here, cutting blades 11 and 22 are provided on the outer peripheral side of the support shafts 10 and 21 in the circumferential direction, and the cutting edges 11A and 22A of the cutting blades 11 and 22 are tapered.
As shown in FIG. 10, when the support shafts 10 and 21 are pushed into the respective set holes 3 as described above, the support shafts 10 and 21 are inclined as shown in FIG. The tapered portions 10B, 21B and the cutting edges 11A, 22A of the respective cutting blades 11, 22 smoothly guide into the respective set holes 3, and accordingly, the respective cutting edges 11A, 22.
A gradually penetrates around each set hole 3 by a depth substantially equal to each other.

Finally, the movable table 15 is positioned on each rail 16 via bolts or the like, and the operating handle 23A is rotated in this state, thereby rotating the operating table 23 while reducing the distance between the supporting shafts 10 and 21. Each butting pin 7 of the plates 7 and 18
Until A, 18A bites into each disk part 1B, the support shaft 10,
21 is further pushed into each set hole 3.

As a result, as shown in FIG.
1 is a cutting blade 1 in each set hole 3 of the barrel winding drum 1.
The barrel winding drum 1 and the spindles 10 and 21 are automatically aligned to a concentric (coaxial) position via the spindles 1 and 22, and in this state, the barrel winding drum 1 is securely fixed to the spindles 10 and 21. It can be stopped while centering at the center. Further, both sides of the barrel winding drum 1 can be reliably held between the rotating plates 7, 18 via the respective abutting pins 7A, 18A, and the rotational torque acting on the cutting blades 11, 22 when the barrel winding drum 1 rotates. Can be reduced, and the positioning strength with respect to the barrel winding drum 1 can be increased by the respective abutment pins 7A and 18A and the respective cutting blades 11 and 22.

Thus, after the barrel-wound drum 1 is set between the support shaft 10 on the fixed base 5 and the support shaft 21 on the movable base 15 in a self-centering state as described above, the rope winch is removed from the barrel-wound drum 1. A new wire rope 2 is supplied to the drum side.

That is, when winding a new wire rope 2 around a drum on the rope winch side provided in a hydraulic crane or the like, the tip side of the wire rope 2 is taken out from the barrel winding drum 1 and this tip side is hooked on the drum. I do. Next, in this state, the drum side is rotated while the hydraulic motor 12 is stopped, so that the barrel-wound drum 1 is moved together with the support shaft 10 on the fixed base 5 and the support shaft 21 on the movable base 5 in FIG. The wire rope 2 is forcibly rotated in the direction indicated by the arrow A, whereby the wire rope 2 is unwound from the barrel winding drum 1 and the wire rope 2 is gradually wound on the rope winch-side drum. .

At this time, a resistance (braking force) is applied to the rotation of the barrel winding drum 1 by a relief valve provided on the hydraulic motor 12 on the fixed base 5 side. On the other hand, a large tension can be applied, and the wire rope 2 can be wound around the drum on the rope winch side with sufficient tension.

Therefore, according to the present embodiment, even if the diameter of the set hole 3 varies, the barrel winding drum 1 can be easily aligned with the spindles 10 and 21 by the cutting blades 11 and 22 in a self-aligning state. And the workability when setting the barrel winding drum 1 can be reliably improved.

At the time of unwinding and winding the wire rope 2, the barrel drum 1 is connected to the spindles 10, 21 in a state where the rattle between the set holes 3 and the spindles 10, 21 is suppressed.
Can be rotated stably around the center, which can eliminate the disadvantages such as the wire rope 2 vibrating greatly between the barrel winding drum 1 and the rope inch as described in the related art. Thus, the tension of the wire rope 1 can be kept constant, and the wire rope 1 can be firmly wound around the rope winch.

The diameter of the set hole 3 'is, for example, about 1
Even for a large barrel-wound drum 1 'or the like having a size of about 30 to 140 mm, each cylindrical cover 24 is placed in each set hole 3' with each cylindrical cover 24 attached to the support shafts 10, 21. The barrel winding drum 1 is connected to the support shafts 10 and 21 by fitting.
It can be easily installed in a state where it is centered.

Next, FIG. 11 shows a second embodiment of the present invention. In this embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. And
However, a feature of the present embodiment is that each cylindrical cover 31 that covers each cutting blade 11, 22 from the outside on the outer peripheral side of the support shaft 10, 21.
(Only the spindle 10 side is shown) is detachably provided, and another cutting blade 32 as an alignment blade is provided on the outer peripheral side of the cylindrical cover 31.
Are integrally provided, so that each cylindrical cover 31 is provided.
In each set hole 3 '.

Here, the cylindrical cover 31 is connected to the first cover.
It is formed substantially in the same manner as the cylindrical cover 24 described in the embodiment, and includes a cylindrical portion 31A, a tapered portion 31B,
C. However, each of the mounting grooves 10 according to the first embodiment is spaced apart from the cylindrical cover 31 in the circumferential direction.
. Are different from those of the first embodiment in that mounting grooves 31D, 31D,... Substantially similar to C, 21C are formed along the axial direction.

Each of the cutting blades 32 is formed substantially in the same manner as in the first embodiment, and has a tapered cutting edge 32A. And each cutting blade 32
The base end side is fixed to each mounting groove 31D of the cylindrical cover 31 by welding or the like, and each cutting edge 32A bites around the set hole 3 '.

Thus, in the present embodiment having the above-described structure, substantially the same operation and effect as those in the first embodiment can be obtained.
By attaching each cylindrical cover 31 to the outer peripheral side of the support shafts 10 and 21 even for the large barrel-wound drum 1 ′ in which the diameter of the set hole 3 ′ is increased to about 40 mm, the respective cutting blades 32 can be cut. It is possible to reliably bite around the set hole 3 '. And, even for the large barrel-wound drum 1 ', it is possible to easily hold the spindles 10 and 21 in a self-aligning state by the respective cutting blades 32, and to improve the workability at the time of mounting the barrel-wound drum 1'. Can be improved.

In each of the above embodiments, each cutting blade 1
1 and 22 (32) are connected to the support shafts 10 and 21 (the cylindrical cover 31).
It is described that four cutting blades are provided on the outer peripheral side of the cutting blade. However, the number of the cutting blades 11 and 22 (32) may be three or five or more.

Further, in each of the above embodiments, the rotary support device is described as being used for exchanging the wire rope 2 of the hydraulic crane, but the present invention is not limited to this. It can be widely applied when exchanging a wire rope for use.

[0058]

According to the present invention, as described in detail above, according to the first aspect, each support shaft provided on each of the first and second support bases is fitted into each set hole of the barrel drum. Since at least one of the support shafts is provided with a tapered centering blade that bites around the set hole to hold the barrel winding drum in an automatically centered state, the set hole is provided. Even if there is a variation in the hole diameter of the barrel winding drum, the barrel winding drum can be easily attached to the support shaft by the centering blade in a self-aligning state, and the barrel winding drum can be moved between the first and second support bases. It is possible to improve the workability and the like when setting the device. Then, at the time of unwinding and winding the wire rope, the barrel winding drum is stably rotated about each spindle while the rattling between each set hole and each spindle is suppressed by the centering blade. Thus, the vibration generated in the wire rope or the like can be reduced, and the wire rope can be firmly wound on a drum or the like of a rope winch with a stable tension.

According to the second aspect of the present invention, one of the first and second support bases is configured as a fixed base fixed to the base, and the other support base is configured as the fixed base. Since it is configured as a movable table movably provided on the base so as to approach and separate from the base, when mounting the barrel winding drum between the respective spindles, only the movable table is moved on the base, The winding drum can be easily attached between the spindles via the centering blade, and the workability and the like when setting the barrel winding drum between the fixed base and the movable base can be further improved.

Further, according to the third aspect of the present invention, a tapered portion for guiding the support shaft toward the inside of the setting hole of the barrel winding drum is formed at the tip end side of the support shaft, and the aligning blade is formed on this taper portion. Since it is formed as a plurality of cutting blades that project radially outward at substantially corresponding taper angles and are provided at intervals in the circumferential direction of the support shaft, the entire support shaft is tapered and each of the cut blades when the barrel winding drum is mounted. Thereby, it can be easily guided into the setting hole of the barrel winding drum, and the workability at the time of mounting can be further improved. And each cutting blade can be cut into several places around the set hole at intervals,
The mounting strength of the barrel drum to each spindle can be easily increased.

Further, according to the fourth aspect of the present invention, a cylindrical cover that covers the centering blade from the outside is detachably provided on the outer peripheral side of the support shaft, and another centering blade is integrally formed on the outer peripheral side of the cylindrical cover. Even if a large barrel winding drum with a large set hole diameter is rotatably supported, the centering blade of the cylindrical cover is used instead of the centering blade of the spindle around the set hole. The barrel winding drum can be easily held in a self-aligning state with respect to the spindle by the centering blade of the cylindrical cover. Workability and the like when setting between the second support bases can be reliably improved. At the time of unwinding and winding the wire rope, the barrel winding drum is stabilized around each spindle while the rattling between each set hole and each cylindrical cover is suppressed by the other centering blade. Thus, vibration generated in the wire rope or the like can be reduced, and the wire rope can be firmly wound around a drum or the like of a rope winch with stable tension.

[Brief description of the drawings]

FIG. 1 is a plan view illustrating a rotation support device for a barrel-wound drum according to a first embodiment of the present invention.

FIG. 2 is a partially broken front view showing a barrel winding drum set on each spindle in FIG. 1;

FIG. 3 is a right side view of FIG. 2 showing a rotary support device for the barrel winding drum.

FIG. 4 is an enlarged view showing a state in which a spindle is set on a barrel winding drum.

FIG. 5 is a cross-sectional view as seen from a direction indicated by arrows VV in FIG. 4;

FIG. 6 is a perspective view showing a spindle and each cutting blade in FIG. 4;

FIG. 7 is a sectional view showing a state in which a cylindrical cover is attached to the support shaft shown in FIG.

8 is a front view showing a state before setting a barrel drum between a fixed base and a movable base in FIG. 2;

FIG. 9 is a front view similar to FIG. 8, showing a state where a support shaft on the fixed base side is moored in a setting hole of the barrel winding drum.

FIG. 10 is a front view similar to FIG. 8, showing a state where each spindle is fitted into each set hole of the barrel winding drum.

FIG. 11 is an enlarged cross-sectional view showing a support shaft, a cylindrical cover, and respective cutting blades provided in a rotary support device for a barrel-wound drum according to a second embodiment of the present invention.

[Explanation of symbols]

 1, 1 'barrel winding drum 2 wire rope 3, 3' setting hole 4 base 5 fixed base (first support base) 10, 21 support shaft 10B, 21B tapered portion 11, 22, 32 cutting blade (aligning blade) 15 Moving table (second support table) 31 Cylindrical cover

Claims (4)

[Claims] 1. A barrel winding drum formed of a wooden material and having a set hole at each of central portions at both ends in the axial direction, and disposed so as to sandwich the barrel winding drum from both sides in the axial direction.
First and second support bases each provided with a support shaft rotatably supporting the barrel-wound drum in a state fitted in each of the set holes; and each of the first and second support bases provided on the first and second support bases. And a tapered centering blade that is attached to at least one of the shafts and that bites around a setting hole of the barrel winding drum in order to maintain the barrel winding drum in a self-aligning state. Rotary support device for barrel winding drums. 2. One of the first and second supports provided on both sides in the axial direction of the barrel winding drum, one of the supports is configured as a fixed base fixed to a base, and the other support is configured as a fixed base. The rotary support device for a barrel-wound drum according to claim 1, comprising a movable table movably provided on the base so as to approach and separate from the fixed table. 3. A tapered portion for guiding the spindle toward the set hole of the barrel winding drum is formed at a tip end side of the spindle, and the centering blade is provided in a circumferential direction of the spindle. The rotary support device for a barrel-wound drum according to claim 1 or 2, comprising a plurality of cutting blades provided at intervals and projecting radially outward with a taper angle substantially corresponding to the tapered portion. 4. A structure in which a cylindrical cover that covers the centering blade from the outside is detachably provided on the outer peripheral side of the support shaft, and another centering blade is integrally provided on the outer peripheral side of the cylindrical cover. The rotary support device for a barrel-wound drum according to claim 1, 2 or 3.