JPH0733384A - Bridge type crane - Google Patents

Abstract

PURPOSE:To provide a bridge type crane capable of shrinking the intake space of a suspended cargo and suppressing the sway and attitude fluctuation of the suspended cargo. CONSTITUTION:This bridge type crane is provided with two travel rails 1, a girder 3 suspended astride both travel rails 1 and capable of traveling on the travel rails 1, a boom 5 horizontally fitted to the lower section of a trolley 4 traversable along the girder 3, a hoist 8 mounted on one end section of the boom 5 or the girder 3, a hoisting cable 9 fitted to the hoist 8 at one end section and suspended via a bending sheave 10 at the other end section of the boom 5, a grasping device 12 capable of grasping a suspended cargo 11 automatically or manually and connected to the other end section of the hoisting cable 9 via a pyramid coupling projection 12b protruded at the upper center, and a holding device 14 provided at the other end section of the boom 5 to be inserted with the hoisting cable 9 and provided with a coupling recess 14c couplable with the coupling projection 12b. When the coupling projections 12b and the coupling recess 14c are coupled with each other, the suspended cargo 11 is connected integrally with the boom 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bridge crane such as an overhead traveling crane or a gate crane used for hoisting in a building or a shaft, and more particularly to a bridge crane used for hoisting a high lift. .

[0002]

2. Description of the Related Art Conventionally, as a bridge crane of this type,
For example, an overhead traveling crane shown in FIG. 4 is known. This overhead traveling crane is constructed with columns 3
Two traveling rails 32 provided horizontally and in parallel on one
A girder 33 that is laid across both traveling rails 32 and can travel via saddles at both ends (not shown), a trolley 34 that can traverse along the girder 33, and a horizontal and telescopic part at the bottom of the trolley 34. And a hoisting machine 37 mounted on one end (right end in FIG. 4) of the boom 36, the boom 36 being provided so as to be pivotable in a horizontal plane via the revolving device 35. One end of the hoisting machine 37 is attached to the upper machine 37, and the hoisting rope 38 hangs down via a bending sheave (not shown) on the other end of the boom 36 and the other end of the hoisting rope 38. And a hanging metal fitting 40 that locks a hanging load 39 such as the above.

[0003]

However, in the conventional bridge crane, since the suspension type hoisting is performed by the wire rope, even when the suspended load reaches the hoisting upper limit,
Since there is a wire rope between the boom and the suspended load, the space for taking in is large, and the suspended load swings due to the movement of the crane, which makes it difficult to build it in a prescribed position and in a prescribed posture. For this reason, a rope is tied to the suspended load, and posture control and guidance are performed manually by human power, but there is a risk of inconvenience due to work at a high place and heavy weight.
Also, a method of attaching a fan to the hanging bracket to control the posture or a method of rewinding the wire rope for posture control by an automatic winch to control the posture has been considered, but there are problems in noise and effect, There was a problem that it could not be used in a narrow place such as inside. Therefore, an object of the present invention is to provide a bridge-type crane that can reduce a space for taking in a suspended load and can suppress swinging of the suspended load and variation in posture.

[0004]

In order to solve the above-mentioned problems, the bridge crane of the present invention is provided with two traveling rails provided horizontally and in parallel, and laid across both traveling rails. And a trolley that can travel along the traveling rail, a trolley that can traverse along the girder, a boom horizontally attached to the lower part of the trolley, a hoist mounted on one end of the boom or the girder, and a hoist. One end is attached to the upper machine, and the hoisting rope hung down through the bending sheave on the other end of the boom and the suspended load can be automatically or manually gripped, and are provided at the center of the upper part. A gripping device connected to the other end of the hoisting rope through the pyramidal fitting convex portion,
A holding device is provided which allows the hoisting rope to be inserted and is provided at the other end of the boom and which is provided with a fitting concave portion which can be fitted with the fitting convex portion.

[0005]

In the above means, the hanging load is integrally connected to the boom at a position close to the other end of the boom by fitting the fitting protrusion of the gripping device into the fitting recess of the holding device. .

[0006] It is preferable that the holding device and the gripping device have a cushioning function of absorbing and mitigating an impact at the time of collision between them. Further, it is preferable that the beam has a cushioning function of absorbing and relaxing the impact at the time of collision between the both devices. Furthermore,
The holding device is preferably rotatable in a horizontal plane. In this case, it is desirable that the connecting portion between the other end of the hoisting rope and the fitting convex portion of the gripping device be relatively rotatable in the horizontal plane. Furthermore, the boom is preferably extendable / contractible in the longitudinal direction thereof, and is preferably pivotable in a horizontal plane about the attachment portion with the trolley. Further, two sets of the hoisting machine, hoisting rope, holding device and gripping device may be installed side by side.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of an overhead traveling crane showing an embodiment of a bridge crane of the present invention, and FIG. 2 is an enlarged view in which a part of its main part is broken. In the figure, reference numeral 1 denotes two traveling rails made of H-shaped steel horizontally and parallelly provided on pillars 2 of a building which are arranged opposite to each other.
A girder 3 made of shaped steel or the like is straddled over a saddle (not shown) at both ends having a plurality of wheels,
Further, it is provided so as to be able to travel by a travel motor (not shown). The girder 3 is provided with a trolley 4 which can be traversed by a traverse motor (not shown).
A telescopic telescopic boom 5 is horizontally attached via a support rod 6 to the lower part of the, and includes an internal gear, a pinion meshing with the internal gear, and a motor for driving the pinion. The turning device 7 is provided so as to turn about the support rod 6 in a horizontal plane.

A hoisting machine 8 is mounted on one end (right end in FIG. 1) of the telescopic boom 5. A hoisting rope 9 having one end attached to the hoisting machine 8 is wound around the hoisting machine 8, and the hoisting rope 9 is connected to the other end portion (the left end portion in FIG. 1) of the telescopic boom 5. ) Bent sheave 1 mounted on top
It has been drooping through 0. At the other end of the hoisting rope 9 that has passed through the bending sheave 10, a gripping device 12 having a plurality of pairs of gripping claws 12a capable of automatically or manually gripping a suspended load 11 such as a steel frame is provided. Are connected via a pyramid-shaped fitting convex portion 12b protruding from the. Each grip claw 12a of the grip device 12 may be operated by an actuator or a drive source (not shown) mounted on the device. Further, the fitting convex portion 12b is provided so as to be rotatable relative to the other end of the hoisting rope 9 in the horizontal plane. on the other hand,
A columnar holding body 14a of a holding device 14 is rotatably attached to the other end of the telescopic boom 5, and the holding body 1
A shaft hole 1 through which the hoisting rope 9 is movably inserted in 4a.
4b is provided, and a fitting concave portion 14c capable of fitting the fitting convex portion 12b of the gripping device 12 is provided so as to be connected to a lower portion of the shaft hole 14b. Holding body 14
On the inner surface of the fitting concave portion 14c of a, an elastic material such as rubber is attached, which serves as a damper 15 that absorbs and absorbs an impact when the fitting convex portion 12b of the gripping device 12 is abutted. Then, the holding device 14 is rotated about the shaft hole 14b by a rotating device 16 including a pinion (not shown) that meshes with a gear 14d provided on the upper outer peripheral surface of the holding body 14a and a motor 16a that drives the pinion. It is rotatably installed in the horizontal plane. In FIG. 2, reference numeral 17 is a guide sheave that guides the hoisting rope 9, and 18 is a hinge-shaped shock absorber capable of bending the vicinity of the other end of the telescopic boom 5 upward, which is a collision between the holding device 14 and the gripping device 12. It absorbs and alleviates the impact of contact.

In the overhead traveling crane having the above structure,
After the grasping device 12 completes the grasping of the suspended load 11, the hoisting machine 8 winds the hoisting rope 9 to raise the suspended load 11 together with the grasping device 12 at a high speed, and the grasping device 12 reaches an upper limit (for example, a lift of 100 m). 90 m), the fitting protrusion 12b of the gripping device 12 fits into the fitting recess 14c of the holding device 14 due to deceleration, and the tension of the hoisting rope 9 causes the gripping device 12 and the suspended load to be increased. 11 is integrally connected to the holding device 14. When the fitting convex portion 12b of the gripping device 12 and the fitting concave portion 14c of the holding device 14 are fitted to each other, the shock at the time of abutting the both portions is absorbed and alleviated by the damper 15 and the shock absorbing device 18. Then, by moving the girder 5 and traversing the trolley 4, the suspended load 11 is moved to a required position,
If necessary, the swinging device 7 swivels and the telescopic boom 5 extends and retracts to adjust the position in a medium-scale range, or the rotating device 16 rotates to control the attitude and position of the suspended load 11 in a minute range to suspend the suspended load 11. Build in.

Here, the time required for unwinding, slinging, hoisting, rotation, etc. when the steel frame and the outer wall (curtain wall) are built using the above overhead traveling crane and the conventional overhead traveling crane The measurement results are shown in Table 1.

[0011]

[Table 1]

Therefore, the swing of the suspended load can be suppressed early, the posture control of the suspended load is facilitated, and the mounting control of the suspended load is facilitated, so that the construction cycle is about 20% of the conventional cycle. It turns out that it can be shortened. Further, the distance between the lower end of the telescopic boom and the top end of the suspended load is about 3 m, and it is possible to reduce the take-in space by about 25% compared to the conventional 4 m. Further, as a secondary effect of each of the above-mentioned effects, the posture of the suspended load is repositioned and manual work for mounting is eliminated, and safety is improved.

FIG. 3 is a plan view of a main part of an overhead traveling crane showing another embodiment of the bridge crane of the present invention. In this overhead traveling crane, similarly to the above-described embodiment, the telescopic boom 5 is horizontally attached via the support rod 6, and the swing device 7 is provided so as to be rotatable about the support rod 6 in a horizontal plane. And this telescopic boom 5
Two hoisting machines 20 are mounted so as to sandwich the support rod 6 on one end (the right end in FIG. 3) of the. A hoisting rope 21 having one end attached to each hoisting machine 20 is wound around each hoisting machine 20, and each hoisting rope 21 is connected to the other end (the left end in FIG. 3) of the telescopic boom 5. Part) and is hung down via a bending sheave (not shown) mounted on the upper part. On the other hand, on the lower surface of the other end of the telescopic boom 5,
A disk-shaped rotating device 22 is provided rotatably in the horizontal plane centering on the other end of the telescopic boom 5, and on the lower surface of this rotating device 22, two hoisting ropes 21 that can be inserted are provided. The holding device 23 is attached so as to sandwich the other end of the telescopic boom 5. And each holding device 2
A gripping device 24 having a plurality of pairs of gripping claws (not shown) capable of automatically or manually gripping the suspended load 11 is provided at the upper end of the other end of each hoisting cord 21 through which the 3 is inserted. The two projections are connected via two conical protrusions (not shown) having a conical shape.
Fitting recess and damper provided on the lower surface of 3 (both not shown)
It is provided so that it can be fitted through. Therefore, in the above-mentioned overhead traveling crane, it is possible to prevent the hanging load 11 from rotating in the horizontal plane without forming the fitting convex portion or the like into a pyramid shape. Other configurations and operational effects are shown in FIGS.
Since it is almost the same as the overhead traveling crane shown in, the description thereof will be omitted.

In each of the above-described embodiments, the case where the damper is provided in the fitting concave portion has been described, but the present invention is not limited to this, and the damper may be provided in the fitting convex portion or both portions. . Moreover, it is not limited to the case where it is applied to an overhead traveling crane of a normal building, and for example, an automatic building construction method, that is, first, a temporary roof or a future top floor (self-raising roof) is constructed to cover the lower part from wind and rain. ,
It can be applied to an overhead traveling crane for a self-propelled roof of a construction method in which the self-propelled roof is pushed up sequentially using an unmanned working device in an all-weather environment and the next floor and below are automatically constructed,
Alternatively, it may be applied to a portal crane or other bridge crane that moves up and down a heavy load. Further, the hoist may be mounted not on the boom but on one end of the girder to reduce the load on the girder.

[0015]

As described above, according to the bridge crane of the present invention, the fitting convex portion of the gripping device fits into the fitting concave portion of the holding device, thereby bringing the boom closer to the other end. Since the suspended load is integrally connected to the boom at the position,
Compared with the conventional method, the hanging space can be reduced, swinging of the suspended load and posture change can be suppressed, safety can be improved, and the construction cycle time can be significantly shortened.

[Brief description of drawings]

FIG. 1 is a front view of an overhead traveling crane showing an embodiment of a bridge crane of the present invention.

FIG. 2 is an enlarged view in which a part of a main part of the overhead traveling crane shown in FIG. 1 is cut away.

FIG. 3 is a plan view of a main part of an overhead traveling crane showing another embodiment of the bridge crane of the present invention.

FIG. 4 is a front view of an overhead traveling crane that is an example of a conventional bridge crane.

[Explanation of symbols]

 1 Traveling rail 3 Girder 4 Trolley 5 Telescopic boom 8 Hoisting machine 9 Hoisting rope 10 Bending sheave 12 Grasping device 12b Fitting convex part 14 Holding device 14c Fitting concave part

Claims (1)

[Claims] 1. A two traveling rails provided horizontally and in parallel, a girder spanning both traveling rails and capable of traveling on the traveling rails, and a trolley traversable along the girder. A boom horizontally attached to the bottom of the trolley, a hoist mounted on one end of the boom or girder, one end of the hoist mounted on the hoist, and a bending sheave on the other end of the boom. And the other end of the hoisting rope, which is provided so as to be able to automatically or manually grasp the hoisting load and which is provided in the center of the upper portion through a pyramidal fitting protrusion. And a holding device which is provided at the other end of the boom so that the hoisting rope can be inserted and which is provided with a fitting concave portion that can be fitted with the fitting convex portion. A bridge crane characterized by this.