JP3085855B2 - Swiveling overhead traveling crane - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swiveling overhead traveling crane used for building buildings and the like.

[0002]

2. Description of the Related Art Hitherto, a structure as shown in a side view of FIG. 7 and a plan view of FIG. That is, in the figure, 51 is a rail in the front-rear direction laid on the lower surface of the ceiling, 52 is a traveling platform of an overhead crane that travels by engaging the traveling wheel device 53 with the rail 51,
Reference numeral 54 denotes a post 56
Body of an overhead crane that supports and supports
Reference numeral 7 denotes a boom which is provided so as to extend horizontally forward from the fuselage 54, 58 is a pair of right and left hoisting drums which are provided on the fuselage 54, and 59 is a cable end connecting and mounting means which is provided on a boom 57 near the post. A pair of left and right gear jacks, 60 is a horizontally long horizontal swivel beam pivotally mounted on the lower surface near the tip of the boom 57 by a vertical shaft 61, 62 is a swivel motor for the swivel beam 60, and 63 is the hoist drum 58 from the hoist drum 58 to the boom 57. After passing through the sheave and the sheave of the swiveling beam 60, the suspension beam 64 immediately below the sheave
This is a pair of left and right hoisting ropes that suspend the upper sheave, pass through the swivel beam 60 and the sheave on the boom 57, and connect the other end to the drive end of the gear jack 59. The crane moves to the required position by traveling the traveling gantry 52, turns the body 54 around the post 56, turns the boom 57 in the required direction, and turns the turning beam 60 in a predetermined direction by the turning motor 62. Then, the load is slung on the hook of the suspension beam 64, and the load is lifted and conveyed by driving the hoist drum 58.

[0003]

However, in the above-mentioned conventional apparatus of this type, a large number of guide sheaves are provided symmetrically on the boom 57, and the suspension beam 64 is raised and lowered via the hoisting cable 63. Turning beam 6 by turning motor 62
When turning 0, the left and right hoisting ropes 63 intersect and the turning beam 60 turns only about ± 60 ° in the horizontal plane (the range of the arrow 65 in FIG. 8), and the remaining about 30 ° If it cannot be adjusted by traveling and turning, a blind spot where the suspension beam 64 cannot be aligned with the load will result. At the time of lifting such a load, it is necessary to perform a very dangerous and troublesome work such as swinging the load by manually swinging the suspension beam 64 or swinging the load. There is a problem that a crane operation causes a lost time.

[0004] The present invention has been proposed in view of such circumstances, and enables the suspension beam 64 to be horizontally rotated by ± 90 °,
It is an object of the present invention to provide a safe and economical swiveling overhead traveling crane with improved operation efficiency and labor saving.

[0005]

For this purpose, the invention according to claim 1 is provided so as to be able to run and turn along a rail erected in the front-rear direction on the lower surface of the ceiling of a building and to have ± 90 ° at the tip of the boom. In a crane in which a suspension beam rotatable in a range can be lifted and lowered via a hoisting line, a swivel that is pivotally supported on the end of the boom and rotates around a vertical axis, A swivel caster type vertical through-type guide sheave, which is disposed on each of the left and right sides of the boom tip, and a roll which is disposed below each of the guide sheaves on the revolving base and rotates when the revolving base is rotated. A hoisting cable length fluctuation absorbing mechanism that absorbs fluctuations in the length of the upper cable, and a common hoisting drum with one end fixed to the left and right portions near the rear end of the boom and the other end attached to the rear of the boom Each part is wound and the middle part is After passing through the guide sheave of the swinging table and the sheave of the hoisting cable length fluctuation absorbing mechanism, the sheave at the left and right ends of the suspension beam,
It is characterized by comprising a guide sheave of the revolving base, and a hoisting cable of two systems consisting of a pair of left and right wrapped around the guide sheave at the end of the boom.

According to a second aspect of the present invention, in the first aspect, instead of the boom being supported so as to be able to run directly and along the rail under the ceiling and to be pivotable, it is possible to directly run along the rail. The crane body, which is a vertically cubic frame that is pivotably supported and extends in the front-rear direction, is coaxially inserted in the front-rear direction and is mounted so as to be movable in the front-rear direction via driving means.

According to a third aspect of the present invention, in the first and second aspects, the hoisting cable of the two systems is routed from the left guide sheave at the tip of the boom to the guide sheave at the left rear of the swivel. The first hoisting rope and the support sheave of the left hook of the hoisting rope length fluctuation absorbing mechanism,
The second hoisting rope wound around the guide sheave on the inner left side of the boom tip is separated from the guide sheave on the left front part of the swivel base in the vertical direction as appropriate, and each of the boom tip and the swivel base is separated from each other. Also on the right side, the substantially horizontal portions of the first and second hoisting ropes are wound around in the same manner with appropriate separation in the vertical direction.

According to a fourth aspect of the present invention, in the third aspect, a portion extending from the left sheave of the hoisting rope length fluctuation absorbing mechanism of the first hoisting rope to the right sheave of the mechanism, and the second hoisting mechanism. It is characterized in that an X-shaped portion intersects with a portion of the cable hoisting rope length fluctuation absorbing mechanism that is routed from the right sheave to the left sheave of the same mechanism.

[0009]

According to the above construction, the right and left hoisting rope guide sheaves on the boom and the swivel base are arranged in a combination of two freely swingable caster-shaped center hole guides having different heights. Then, one end of the hoisting rope is passed from the lower left and right guide sheaves on the swivel platform to the lower guide sheave on the boom, and the other end of the hoisting rope is moved from the higher left and right guide sheaves on the swivel platform onto the boom. Through the high guide sheave, and the sheave of the suspension beam is suspended in the middle of the hoisting rope.
The intersections at both ends of these hoisting ropes are spaced apart up and down so that they do not interfere with each other, and the suspension beam can be freely horizontally rotated to an angle slightly exceeding ± 90 °. At the same time, at the same time, as the swivel table turns, the hoisting rope that unwinds from the high and low guide sheave on the swivel side approaching the hoist drum passes through the cross sheave of the hoisting rope length adjustment mechanism and hoists. By being sent to the high and low guide sheaves on the swivel on the side away from the drum, the feed lengths of the hoisting ropes on the left and right of the suspension beam are automatically adjusted to prevent the suspension beam from swinging or tilting. Furthermore, by operating the boom forward and backward on the crane body, it is possible to adjust the reach from the crane's center of rotation to the suspension beam, and when aligning the suspension beam with a load near the crane's travel line, The positioning operation can be performed quickly by moving forward and backward and moving the crane the shortest distance.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall side view, FIG. 2 is a plan view taken along the line II-II of FIG. 1, and FIG. 4, FIG. 4 is a plan view of FIG. 3, FIG. 5 is a cross-sectional view taken along the line VV of FIG. 4, and FIG. 6 is an overall perspective view showing a procedure for taking out a hoisting cable of FIG. .

In the above figures, the same reference numerals as those in FIGS. 7 and 8 denote the same members, respectively. First, in FIGS. 1 and 2, 1 designates a traveling wheel 53 on a traveling rail 51 on the ceiling surface. The crane body 2, whose upper end is engaged with a swivel mechanism 55 on a traveling platform 52 of the overhead crane that travels together and is rotatably supported, is supported so as to be able to move forward and backward through the crane body 1, and has a tip end. Gooseneck horizontal boom, 3 for crane body 1
A driving device for moving the boom 2 forward and backward by engaging with a wire or a rack rail or the like 3 ′ provided on the boom 2 and extending in the front-back direction along the boom 2. Reference numeral denotes a swivel table which is swiveled by a swivel motor 6 provided at an upper portion near the tip of the boom 2. 7a, 7
b, 8a, 8b and 9a, 9b, 10a, 10b are arranged on the boom 2 and the revolving base 5 so as to oppose each other. Is a hoisting cable length adjustment mechanism provided in the lower part of the swivel 5 in a continuous arrangement with the guide sheaves 10a, 10b, 12 is a suspension beam with sheaves 13a, 13b suspended from the swivel 5; 14b is a pair of left and right gear cylinders provided at an intermediate position on the boom 3, and 15 and 16 are the guide sheaves 7a, 7b and 8 respectively.
These are sheaves provided in the front part of the lower boom 2 corresponding to a and 8b. Reference numeral 17 denotes one end of the gear cylinder 14a, 1
4b, the guide sheaves 8a, 8b and 1 extend through the sheave 15 on the boom 2 and extend forward of the boom 2.
After passing through the sheaves 13a and 13b of the suspension beam 12 through the 0a and 10b and the hoisting rope length adjustment mechanism 11,
Left and right 1 provided so that the other end is wound around the hoisting drum 4 via the guide sheaves 9a, 9b and 7a, 7b and the sheave 16.
A pair of hoisting ropes. FIG. 6 shows a procedure for taking out the hoisting cable 17.
As shown in FIG.

Next, the structure of the tip of the boom will be described with reference to FIGS. 3 to 5. The swivel base 5 is mounted on a horizontal extension (FIG. 3) at the front end of the boom 2 via a slide bearing 18 and a vertical center line. , And is rotatably supported by being engaged with a drive pinion 20 of the turning drive motor 6 with an outer peripheral gear 19 provided around the outer periphery thereof. Guide sheave 7a
8b and 9a to 10b are the front end of the boom 2 respectively.
A hoisting cable 17 is hung on a sheave of the cylinder base 23 on a cylinder base 23 with a center hole rotatably supported via a bearing 22 coaxially with a support cylinder 21 erected on the center of the revolving base 5. The bracket 24 is pivotally supported by a sheave shaft of a bracket 24 which is eccentric in the front upper and rear upper directions so as to be rotatable. The guide sheaves 9a to 10b on the revolving base 5 are provided on one side (right side) of the guide sheave 9b for winding around a hoisting cable length adjusting mechanism 11 (FIGS. 3 to 5) described later. , 10b (see FIGS. 3 and 4), the guide sheave 9 on the opposite side (left side).
It is provided larger than the interval between a and 10a by the thickness of one sheave. As shown in FIGS. 4 and 5, the hoisting rope length adjusting mechanism 11 is coaxially adjacent to the sheaves 18a, 18b provided on the respective guide sheaves 10a, 10b so as to be in contact with the outer peripheries on the respective vertical center lines of the center holes. Sheave 18a ', 18
b ', the sheave 18a' is disposed slightly behind the sheave 18a, and the sheave 18b 'is formed in the form of two sheaves disposed slightly forward of the sheave 18b.
The hoisting cable 17 wrapped around the sheaves 18a and 18b from 0a and 10b, respectively, is wrapped around the sheaves 18b 'and 18a' in a crossing manner (cross shape), and is lowered to the opposite side of the suspension beam 12. (FIGS. 4 and 5). As shown in FIG. 3 (chain line) and FIG. 5 (solid line), the suspension beam 12 is provided with a revolving hook 25 at the center and a pair of swinging hooks 26 facing inward at both ends. Sheaves 13a and 13b, and the left sheave 13a
Is wound around the hoisting cable 17 descending from the sheave 18a '(FIG. 5) of the hoisting cable length adjusting mechanism 11, and then wrapped around the upper guide sheave 9a. The right sheave 13b is After the hoisting cable 17 descending from the sheave 18b 'on the opposite side of the adjustment mechanism 11 is wrapped around, it is supported by the hoisting cable 17 so as to be wrapped around the upper guide sheave 9a. When the swivel base 5 shown in FIG. 4 is now rotated clockwise by 90 ° clockwise from the state shown in the drawing by the hoisting rope length adjusting mechanism 11 having such a structure, the winding loosened on the guide sheaves 9b and 10b side. The upper cable 17 is connected to the guide sheave 9a,
The height of the suspension beam 12 is maintained constant and horizontal without being loosened as a whole by being automatically fed by being pulled toward the 10a side.

According to such a structure, as shown in FIGS. 1 to 6, when the hoisting drum 4 (FIGS. 1 and 2) is driven in the winding or unwinding direction, a pair of hoisting ropes 17 is provided. And the other are simultaneously wound and unwound by the same amount, respectively, and the suspension beam 12 is raised or lowered. During the winding or unwinding of the hoisting line 17 or while the hoisting drum 4 is stopped, the turntable 5 is turned 90 ° clockwise by driving the motor 6 from the state shown by the solid line in FIGS. , Guide sheave 9 on swivel 5
a, 10a are forward (FIG. 4), and the guide sheaves 9b, 10
b indicates backwards, 9a ', 10a', 9 indicated by chain lines, respectively.
b 'and 10b' (FIG. 4). From the moved guide sheave 10b 'to the guide sheave 8b on the boom 2
In the plan view, the hoisting cable 17 (chain line) intersects with the hoisting cable 17 (chain line) extending from the moved guide sheaves 9a 'and 9b' to the guide sheaves 7a and 7b on the boom 2, respectively. At that time, one of the intersecting guide sheaves 1
The hoisting cable 17 extending from 0b 'to the guide sheave 8b on the boom 2 passes between the lower guide sheaves and crosses the other intersecting 2
As shown in FIG. 3, the hoisting rope 17 of the book can move without interfering with each other because it crosses over the high guide sheave with a three-dimensional intersection with a vertical interval. Therefore, as shown in FIG. 4, the guide sheave 10b 'that moves clockwise is a hoisting cable 17' between the other guide sheaves 10a 'to 8a in plan view.
When it reaches the position, it comes into contact with the hoisting cable 17 'and causes interference. Therefore, 90 ° which does not contact the hoisting line 17 ′
, The suspension beam 12 that rotates together with the swivel table 5 can freely rotate. At this time, the hoisting cable length adjusting mechanism 11 automatically shifts the hoisting cable 17 from the guide sheaves 9 b ′, 10 b ′ to the 9 a ′, 10 a ′ side, thereby causing the swing and tilt generated in the suspension beam 12. Can be prevented.
In addition, the operation of tilting the suspension beam 12 with the tilted load can be performed by expanding or contracting one of the gear cylinders 14a and 14b or by expanding and contracting both of them in reverse. These operations are the same when the swivel table 5 rotates counterclockwise. In this manner, the suspension beam 12 can be aligned by rotating freely by 360 ° with respect to the load in all directions. Also, when lowering or lifting the suspended load, when the boom 2 is moved backward on the crane body 1 by the drive of the forward / reverse drive device 3,
The suspension beam 12 can be freely moved to a position immediately below the traveling rail 51 of the crane, and can be rotated and positioned in any direction.

[0014]

In summary, the present invention relates to a crane provided with a suspension beam which is provided so as to be capable of running and turning by engaging with a rail laid on the lower surface of a ceiling and which is horizontally rotatable at a boom tip by a hoisting device. A swivel table which is turned by a driving device is provided on the end of the boom, and a pair of rotatable caster-shaped center hole type guide sheaves are provided at the left and right positions on the swivel table and the nearest boom respectively. A hoisting rope length adjusting mechanism for automatically adjusting the hoisting rope length below the left and right guide sheaves on the base is provided on the swivel base at the position below the guide sheave, and one end is connected to the boom and the other end is connected to the boom. A hanging beam located at the lower part of the swivel, which lowers each end side of a pair of right and left hoisting ropes wound on a rear common hoisting drum via the two guide sheaves and the hoisting rope length adjusting mechanism. By providing via the left sheave, ± a suspended beam in this type of crane 90
In this case, the suspension beam can be turned horizontally in a range slightly over a degree so that the suspension beam can be loaded in all directions, and the operation efficiency can be improved. Further, by providing the boom on the crane body capable of traveling and turning so as to be able to move horizontally forward and backward through the driving means, it is easy to shift and position the suspension beam to the load immediately below the traveling rail of the crane, It has the effect of increasing driving efficiency.

[0015] In short, according to the first aspect of the present invention, the vehicle is supported so as to be able to run and turn along a rail erected in the front-rear direction on the lower surface of the ceiling of the building, and is turnable within a range of ± 90 ° at the boom tip. A crane having a suspension beam that can be lifted and lowered via a hoisting line, and a swivel pivotally supported on the boom tip and rotating about a vertical axis, and the swivel and the boom tip A swivel-type caster-type vertical through-type guide sheave provided on each of the left and right sides, and a hoisting rope length that is provided below each of the above-mentioned guide sheaves on the swivel table when the swivel table rotates. A hoisting rope length fluctuation absorbing mechanism that absorbs length fluctuations, and one end is fixed to the left and right portions near the rear end of the boom and the other end is wound around a common hoisting drum attached to the back of the boom. And the middle part is the end of the boom, The suspension beam is passed around the sheaves at the left and right ends of the suspension beam via the guide sheave and the sheave of the hoisting line length fluctuation absorbing mechanism, and then around the guide sheave at the tip of the boom. With the two sets of right and left hoisting ropes, the suspension beam 64 can be turned horizontally by ± 90 ° to increase the operation efficiency, save labor, save labor, and provide safe and economical swivel-type ceiling insertion. The invention is of great industrial benefit because of the availability of cranes.

According to the second aspect of the present invention, in the first aspect, the boom travels directly along the rail under the ceiling, instead of being supported so as to be able to directly travel and turn along the rail under the ceiling. 2. A crane body, which is a vertically cubic frame that is supported and pivotably supported and extends in the front-rear direction, is coaxially inserted in the front-rear direction, and is mounted movably in the front-rear direction via driving means. The present invention is extremely useful in industry because it can increase the movement distance of the boom in the front-rear direction and the turning radius thereof in addition to the effect of the invention.

According to the third aspect of the present invention, in the first or second aspect, the hoisting cable of the two systems is extended from the left guide sheave at the tip of the boom to the guide sheave at the left rear of the swivel. The first hoisting cable that has been turned and the support sheave of the left hook of the hoisting cable length fluctuation absorbing mechanism stand up from the guide sheave on the left front part of the swivel base to the guide sheave on the inner left side of the boom tip. The separated second hoisting rope is appropriately separated in the vertical direction, and the substantially horizontal portions of the first and second hoisting ropes are also raised and lowered in the same manner on the right end of the boom tip and the swivel base. In addition to the effects of claim 1 and claim 2, the turning table can be turned slightly over ± 90 ° without causing interference between the hoisting ropes. Swivel type to enable The present invention is extremely industrially beneficial because it provides an overhead traveling crane.

According to a fourth aspect of the present invention, in the third aspect, a portion of the first hoisting cable extending from the left sheave of the hoisting cable length variation absorbing mechanism to the right sheave of the first hoisting cable, and In addition to the effect according to claim 3, in addition to the effect according to claim 3, when the turntable is turned, the portion of the hoisting line that is routed from the right sheave of the hoisting line length fluctuation absorbing mechanism to the left sheave of the same mechanism intersects. In addition, the present invention is extremely useful industrially because a swivel-type overhead traveling crane that can raise and lower the suspension beam while maintaining the horizontal posture is obtained.

[Brief description of the drawings]

FIG. 1 is an overall side view showing a swiveling overhead traveling crane according to one embodiment of the present invention.

FIG. 2 is a plan view taken along the line II-II of FIG.

FIG. 3 is an enlarged view showing a part III in FIG. 1;

FIG. 4 is a plan view of FIG. 3;

5 is a cross-sectional view taken along the line VV of FIG.

FIG. 6 is an overall perspective view showing a procedure for taking up the hoisting cable of FIG. 1;

FIG. 7 is an overall side view showing a conventional swiveling overhead traveling crane.

FIG. 8 is a plan view of FIG. 7;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Crane body 2 Boom 3 Forward-backward drive 3 'Rack rail 4 Hoisting drum 5 Swivel table 6 Swivel motor 7a, 7b, 8a, 8b, 9a, 9b, 10a, 10b
Caster type center hole type guide sheave 9a ', 9b', 10a ', 10b' Caster type center hole type guide sheave at turning position 11 Hoisting rope length adjustment mechanism 12 Suspended beam 13a, 13b Suspended beam sheave 14a, 14b Gear cylinder 15, 16 Sheave on boom 17 Hoisting cable 18 Thrust bearing 19 Outer gear 20 Drive pinion 21 Support cylinder 22 Bearing 23 Cylinder stand 24 Bracket 25 Swivel hook 26 Swing type hook 51 Traveling rail 52 Traveling cradle 53 Traveling wheel 55 swivel mechanism

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Minoru Tanaka 1534-1, 4-ku, Nishinasuno-machi, Nasu-gun, Tochigi Prefecture Goyo Construction Co., Ltd. 1534-1, Yotsucho Goyo Construction Co., Ltd., Technical Research Institute (72) Inventor Takeo Kanakawa 1534-1, Yokucho, Nishinasuno-cho, Nasu-gun, Tochigi Prefecture Goyo Construction Co., Ltd. Technical Research Institute (72) Inventor Moriki Fujio 6-31 Minami Kannon, Nishi-ku, Hiroshima City, Hiroshima Prefecture Inside Ryosen Engineers Co., Ltd. (72) Inventor Hisayuki Nakata 6-31 Minami Kannon, Nishi-ku, Hiroshima City, Hiroshima Prefecture Ryosen Engineers Co., Ltd. (56 References: Japanese Utility Model Application Hei 6-42887 (JP, U) Japanese Utility Model Application Hei 6-27865 (JP, U) Japanese Utility Model Application 5-19280 (JP, U) (58) Fields surveyed (Int. . ^7, DB name) B66C 11 / 10,17 / 04

Claims (4)

(57) [Claims] 1. A suspension beam which is supported on a lower surface of a ceiling of a building along a rail erected in the front-rear direction so as to be capable of running and turning, and which is rotatable at the tip of a boom within a range of ± 90 ° via a hoisting line. In a crane that can be lifted and lowered
A swivel that is pivotally supported on the boom tip and pivots about a vertical axis, and a swivel caster-type vertical through-type guide sheave that is arranged on the left and right sides of the swivel and the boom tip, respectively. And a hoisting rope length fluctuation absorbing mechanism that is disposed below each of the guide sheaves on the swivel table and absorbs fluctuations in the length of the hoisting rope length when the swivel table rotates. The other end is fixed to the left and right portions near the rear end, and the other end is wound around a common hoisting drum attached to the back of the boom, and the middle portion is the front end of the boom, the guide sheave of the swivel table, and the above winding. After the suspension beam is passed around the sheave at the left and right ends of the suspension beam through the sheave of the upper rope length fluctuation absorbing mechanism, the suspension beam is guided by two sheaves at the end of the boom. Octopus with hoisting rope Turning type overhead traveling crane which is characterized in. 2. The vehicle according to claim 1, wherein the boom is directly runnable and pivotable along the rail under the ceiling, instead of being directly runnable and pivotable along the rail under the ceiling. A swiveling overhead traveling crane, which is coaxially inserted in the front-rear direction of a crane body, which is a vertical cubic frame extending in the front-rear direction, and is mounted so as to be movable in the front-rear direction via driving means. 3. The first winding according to claim 1 or 2, wherein, of the two hoisting lines, the first winding routed from the left guide sheave at the front end of the boom to the guide sheave at the left rear portion of the swivel base. The upper winding and the second winding which is raised from the support sheave of the left hook of the hoisting rope length fluctuation absorbing mechanism, and is wrapped around the guide sheave on the left front part of the swivel base to the guide sheave on the inner left side of the boom tip. At the same time, the horizontal parts of the first and second hoisting ropes are separated from each other in the same manner in the vertical direction as well as on the right end of the boom tip and the swivel. A swiveling overhead traveling crane characterized by: 4. The hoisting rope of the second hoisting cable according to claim 3, wherein a portion of the first hoisting rope extending from the left sheave of the hoisting rope length fluctuation absorbing mechanism to the right sheave of the mechanism is used. A swiveling overhead traveling crane characterized in that an X-shaped crossing is made between a right sheave of the long fluctuation absorbing mechanism and a portion circulated to a left sheave of the same mechanism.