JPH1160149A - Rail span variable bridge crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure a lifting area without useless space by providing a span adjusting means for making running supporting legs follow according to variation of a rail span between a horizontal column and the running supporting leg. SOLUTION: When a rail span variable bridge crane which fixes a slide mechanism 15 and a rotating mechanism 14 with fixing pins 24 and a bolt 21 adjusted according to a span S travels on rails 50 to a bending part G, by releasing the fixing pins 24 and the bolt 21, the slide mechanism 15 and the rotating mechanism 14 move following the rails 50 at the bending part G, and span and the direction of running supporting legs 11 change. When the rail span variable bridge crane is installed in a desired position, the slide mechanism 15 and the rotating mechanism 14 are fixed by the fixing pins 24 and the bolt 21. Therefore, wide range from maximum width to minimum width of the running area is usable. In other words, a lifting area without useless space can be ensured even for an irregular work area, and the work area is used effectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a bridge crane, and more particularly to a bridge crane of a variable rail span suitable for a deformation work area.

[0002]

2. Description of the Related Art Conventionally, in an outdoor work area such as a civil engineering construction site, a bridge crane has been frequently used as a lifting machine for various members. This bridge crane has a horizontal girder,
A steel structure consisting of supporting legs for supporting this from both ends travels on a rail of a fixed span laid in an outdoor work area, and causes various hoisting machines to traverse in or on the horizontal girder. Each cargo handling is carried out. There are various types and structures depending on the application, for example, suitable for miscellaneous cargo handling such as material storage, hoist-type bridge-type crane hanging a monorail hoist at the bottom of the horizontal girder, for heavy load outdoors A jib crane on the horizontal girder, suitable for a club trolley type bridge crane in which a trolley equipped with a hoisting device and a traversing device traverses on or in the horizontal girder, a gas company or a steel mill, etc. A bridge crane with a jib crane provided is a good example.

[0003]

However, when the above-described conventional bridge-type crane is installed in the trapezoidal deformation work area A having the shaft 51 illustrated in FIG. 4, a predetermined span S is previously set as shown in the drawing. Set rails 50 and 5
Therefore, there is a problem that a lifting area (lifting dead zone) D that cannot be covered occurs.

In order to solve the above-mentioned problems, the present invention has been developed to provide a bridge crane with a variable rail span corresponding to a deformed work area and to secure a lean lifting area. It is.

[0005]

In order to achieve the above object, according to the present invention, a rail span variable bridge crane is constructed as follows. A bridge-type crane comprising a horizontal girder, a pair of traveling support legs supporting both ends of the horizontal girder and traveling on rails laid on the ground, and a hoisting machine traversing the horizontal girder as a guide. A span adjusting means provided between the horizontal girder and the traveling support leg so as to follow the traveling support leg in response to a change in rail span; It constitutes a crane.

The span adjusting means includes a turning mechanism for turning the traveling support leg around the horizontal girder as a fulcrum,
A slide mechanism for moving the traveling support leg in a horizontal direction using the horizontal girder as a guide.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention. FIG. 1 is a schematic view showing an example of a bridge crane of a variable rail span type according to the present invention. FIG. 1 shows a plan view, and FIG. FIG. 2 is a perspective view schematically showing an example of a span adjusting means which is a main part of the present invention, as viewed from a direction C in FIG. FIG. 3 is a schematic plan view showing an example in which a rail span variable bridge crane according to the present invention is installed in a certain deformation work area.

First, an overall configuration of a rail span variable bridge crane according to the present invention will be described with reference to FIGS. This rail span variable bridge crane E is
A horizontal girder (beam) 10 made of shaped steel and both ends of the horizontal girder (beam) 10 are supported on rails laid in a certain work area. In this case, a shaft 51 as shown in FIG. A three-dimensional frame is constructed by a steel frame member provided with a saddle (not shown) having a plurality of wheels (not shown) at the bottom running on rails 50 and 50 laid in a trapezoidal deformation work area A having The horizontal girder of a bridge-type crane comprising a pair of traveling support legs 11 and a so-called monorail type hoist 13 that traverses while lowering the horizontal girder (beam) 10 with wheels 12. Between the (beam) 10 and the traveling support leg 11, the traveling supports are supported in response to a change in the span of the rails 50 (a change from the span S to the span S1 illustrated in FIG. 3). A rotation mechanism 14 for rotating the traveling support leg 11 about the horizontal girder (beam) 10 as a fulcrum, and a slide for causing the traveling support leg 11 to traverse using the horizontal girder (beam) 10 as a guide. It is configured by providing a span adjusting means F including the mechanism 15.

The slide mechanism 15 is composed of a channel member 17 that supports the traveling support leg 11 and has rollers 16 provided on both sides of the beam that moves across the horizontal beam (beam) 10. A circular member 19 attached to the center of the upper part of the channel member 17 and having a through hole for a shaft 18 at the center thereof;
And a disk 20 having a shaft 18 at the center, which is attached to the lower center of the upper part of the body so as to fit with the circular member 19 via a shaft 18. The traveling support leg 11 is rotated around the shaft 18 by the rotation mechanism 14 configured as described above. That is, the horizontal beam (beam) 10
Pivot about the fulcrum. The channel material 17 has a through hole at a position corresponding to the through hole, and at a predetermined position on the side surface of the circular member 19, a female screw portion reaching the through hole of the shaft body 18 is provided. , Bolt 21
Is screwed. In this case, as shown in FIG. 1, the traveling support leg 11 on one side is fixed to the horizontal beam (beam) 10.

The fixing of the slide mechanism 15, that is,
As shown in FIGS. 1 and 2, the channel member 17 is fixed to the through hole 22 of the fixing pin 24 provided on the horizontal beam (beam) 10 at a predetermined pitch (a pitch set in advance by a rail span). The fixing pins 24 are fixed by passing the fixing pins 24 through the holes 23 of the fixing pins 24 arranged above the channel member 17 so as to correspond to the through holes 22 of the fixing pins 24. did. The rotation mechanism 14, that is, the shaft 18 is fixed by screwing a bolt 21 into the female screw portion.

The movement and fixation of the traveling support leg 11 by the slide mechanism 15 and the rotation mechanism 14 are as follows.
It was manually performed with a crane provided separately, and the wheels (not shown) arranged on the saddle (not shown) were able to swing. The slide mechanism 15 and the rotation mechanism 14 may be provided with driving means such as a motor for automation. Further, the horizontal beam (beam) 10
The horizontal beam (beam) 10 divided into a predetermined length is configured by bolt connection, and after the span adjustment, an extra horizontal beam (beam) 10 is removed.

When the rail-span variable bridge crane E thus configured is applied to the example of FIG. 3, the following is obtained.
According to the span S, the fixing pin 24 and the bolt 21 described above are used.
The rail span variable crane E to which the slide mechanism 15 and the rotation mechanism 14 are fixed by the
When the vehicle travels above and comes to a bend G, the fixing pin 2
When the bolt 4 and the bolt 21 are removed, the slide mechanism 15 and the rotating mechanism 14 move following the rail 50 of the bent portion G, and the span and direction of the traveling support leg 11 change. Thus, when installing the rail span variable bridge crane E at a desired position, the fixing pin 24 and the bolt 2
1, the slide mechanism 15 and the rotation mechanism 14 are fixed.

[0013]

The conventional bridge crane can be installed only with the rail span having the minimum width of the traveling area. However, the variable span span type bridge crane according to the present invention can be used to change the maximum width to the minimum width of the traveling area. Can be used over a wide area. That is, a lean lifting area can be secured even in the deformed work area, and the work area can be effectively used.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example of a bridge crane of a variable rail span type according to the present invention. Is the outline view of the plane,
Shows an outline view of arrow B in FIG.

FIG. 2 is a perspective general view showing an example of a span adjusting means as a main part of the present invention, viewed from a direction C in FIG. 1;

FIG. 3 is a schematic plan view showing an example in which a rail span variable bridge type crane according to the present invention is installed in a certain deformation work area.

FIG. 4 is a schematic plan view showing an example of a case where a conventional bridge crane is installed in a certain deformation work area.

[Explanation of symbols]

10 ··· Horizontal beam (beam) 11 ··· Running support leg 12 ··· Wheels 13 ··· Hoisting machine (hoist) 14 ··· Rotating mechanism 15 ··· Slide mechanism 16 ··· Roller 17 ··· Channel material 18 ··· Shaft 19 ··· Circular member 20 ··· Disk 21 ··· Bolt 22 ··· Through hole for fixing pin 24 23 through-hole for fixing pin 24 24. fixing pin 25 ... traversing stopper of hoist 13 (26) hook for lifting load 50 ... rail (running) 51 ... · Vertical shaft A · · · Deformation work area D · · · Lifting area that cannot be covered (lifting dead zone) E · · · Rail span variable bridge type crane F · · · ..Span adjusting means G ... Bent section S ... Span (rail 5) And the maximum width) S1 · · · span between 50 (minimum width between the rails 50 and 50)

Claims (1)

[Claims] 1. A horizontal beam and both ends of the horizontal beam are supported,
In a bridge-type crane comprising a pair of traveling support legs traveling on rails laid on the ground and a hoisting machine traversing with the horizontal girder as a guide, between the horizontal girder and the traveling support legs A variable span adjustable rail span crane provided with span adjusting means for following the traveling support leg in response to a change in rail span.