JP2548478Y2 - Bridge crane - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to an improvement of a bridge-type crane that lifts a relatively medium-weight load weighing about 2 to 5 tons.

(Conventional technology) A bridge crane is a rigid leg that is rigidly connected to the main girder (girder), with one of a pair of legs formed in an eight-letter shape with the lower part diverging, and the other leg can swing with the main girder The main girder is erected between the legs, and a saddle (a girder with wheels that supports the main girder and runs the entire crane) is provided below the legs. At the same time, the main girder has a configuration in which a hoist is provided so as to be able to traverse.

Depending on the installation location, the crane's production style is rated load (maximum load that can be lifted by hooks, etc.), span (distance between centers of parallel running rails), and lift (vertical movement of lifting gear). It is customary that orders and productions are made individually when specifications such as distance) are determined. For this reason, the shapes of the main girder member, the leg member, and the saddle member, which are the main structural members of the bridge type crane, are various.

For example, a main girder member constituting a main girder of a bridge crane may be a box structure having four steel plates formed into a box shape and welded, a plate structure having welded steel plates, or a single I-beam. There are a variety of shapes such as an I-beam structure, an H + I-beam combination structure in which an H-beam and an I-beam are combined and welded, and a truss structure in which angles are combined.

In addition, the legs were formed in an eight-letter shape with the lower part widening,
It is composed of two leg members. Each leg member has a box structure in which four steel plates are formed into a tapered box shape and welded, a single H-beam member, a round steel tube or a square steel tube. Some are used.

Further, the saddle member constituting the saddle includes a box structure in which four steel plates are formed into a box shape and welded, and a saddle member formed by using two channel steels (channels). The dimensions of the main structural members are also determined according to the installation location.

(Problems to be Solved by the Invention) In the above-mentioned conventional bridge-type crane, the shapes and dimensions of the main structural members such as the main girder member, the leg member, and the saddle member are determined and manufactured each time depending on the installation location. It was so diverse that standardization was difficult. For this reason, there was a problem that mass production was not possible, leading to an increase in total cost.

In addition, since it is not possible to standardize or standardize the main structural members, there is a problem that it takes time to arrange the materials and the construction period becomes longer.

When there are many types of the main girder member, the leg member, and the saddle member as described above, it is not possible to regenerate and effectively use the remaining material, resulting in wasteful material removal, which also leads to an increase in cost. was there.

Furthermore, since the leg members of the bridge-type crane are composed of two leg members formed in an eight-letter shape with the lower end diverging, a lot of man-hours are required for the production of the legs, and the number of transporters increases. There was also a problem that transportation costs were expensive.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and it is an object of the present invention to provide a bridge-type crane that standardizes main structural members, enables mass production, shortens the construction period, and eliminates waste of materials. Aim.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a main girder member,
The rigid members and swing leg members supporting the main girder member, and the main structural members of the saddle center body member supporting the leg members are each formed by bending a steel plate of a predetermined length into a U-shaped cross section. A U-shaped steel plate is formed, the steel plate is welded to the opening edge of the U-shaped steel plate, and is made of the same shape member having a closed cross section. It is characterized by having this structure.

(Operation) The present invention provides a main girder member constituting a main girder, rigid leg members and swing leg leg members constituting a leg supporting the main girder, and a saddle center constituting a saddle supporting the leg. In the main structural member of the main body member, a steel plate of a predetermined length is bent into a U-shaped cross section, a steel plate is welded to the opening edge of the U-shaped steel plate to form a closed cross section, a standardized identical shape member, A bridge-type crane is commonly used, and all of the main structural members are formed as single linear members.

(Embodiment) Hereinafter, an embodiment of the bridge crane according to the present invention will be described with reference to FIG.
This will be described with reference to FIGS. Figures 1 to 3
In the figure, an outline of the bridge type crane according to the present invention will be described. Reference numeral 1 denotes a traveling rail laid in parallel on the ground 2, and a bridge type crane 3 is mounted on the traveling rails 1 and 1 so as to be able to travel. In this bridge type crane 3, a main girder (girder) 6 is erected between a rigid leg 4 having a single structure and a rocking leg 5 standing vertically, and a traveling function is provided below the rigid leg 4 and the rocking leg 5, respectively. Saddles 7, 7 are provided.

A hoisting machine 9 is provided on the main girder 6 via a trolley 8 as a movable body so as to be able to traverse. Reference numeral 10 denotes a traveling motor provided on the saddle 7, reference numeral 11 denotes traveling wheels driven by the traveling motor 10 mounted on the saddle 7 (see FIG. 3), and reference numeral 12 denotes a power supply to the hoist 9. Reference numeral 13 denotes a messenger wire for supporting the cabtire cable 12 having both ends secured to the main beam 6 by appropriate means.

Next, members commonly used for the main girder 6, the rigid leg 4, the swing leg 5, and the saddle 7 will be described with reference to FIG. This member includes a U-shaped steel plate 14 formed by bending a steel plate of a predetermined length (for example, 10 m) into a U-shaped cross section by pressing or the like, a wide flange steel plate 15 covering the opening edge of the U-shaped steel plate 14, and the like. It is roughly composed of Then, this member is abutted against the opening edge of the U-shaped steel plate 14 so as to cover the flange steel plate 15, and is formed by fillet welding W from both outer sides, and has a substantially box-shaped closed cross section. Has become. This U-shaped steel plate 14
The width dimension A1 is modularized at a pitch of, for example, 300 mm to 50 mm, and the height B of the upright portion is also, for example, 30 mm.
The U-shaped steel plates 14 of each size are manufactured by being modularized at a pitch of 0 mm to 100 mm, and are mass-produced. When the U-shaped steel plate 14 is used, it is cut or welded to obtain a desired length.

Next, the main girder will be described with reference to FIGS. The main girder 6 is composed of the U-shaped steel plate 14A and the flange steel plate 1 described above.
5A, the width A2 of the flange steel plate 15A is formed wider than the width A1 of the U-shaped steel plate 14A. And on the left and right protruding parts 16, 16 of this flange steel plate 15A,
A traversing wheel (not shown) rotatably supported by the trolley 8 of the hoisting machine 9 described above is mounted. This allows the hoist 9 to traverse along the main girder 6.
In the vicinity of both ends of the main girder 6, stoppers 17, 17 for restricting the traverse of the hoisting machine 9 are provided.

Inside the main girder 6, vertical stiffeners 18, 18,... Formed by welding flat steel are welded in a span direction at a predetermined pitch. The upper two corners of the vertical stiffener 18 are cut out so as not to interfere with the bent portion of the U-shaped steel plate 14A. It is needless to say that a horizontal stiffener may be provided inside the main girder 6 as desired.

Side plates 19 are welded to both ends of the main girder 6 so as to cover the opening of the U-shaped steel plate 14A. A base plate 20 for attaching a rigid leg is welded to the lower surface of one end of the main girder 6, and a rectangular frame 21 (see FIG. 9) for attaching a swing leg is welded to the lower surface of the other end. . The frame 21 is provided with an insertion hole 23 through which a swing leg mounting shaft 22 described later is inserted.

Next, the rigid leg portion will be described with reference to FIGS. The rigid leg 4 is made of the U-shaped steel plate 14B and the flange steel plate 15B described above.
And has a substantially rectangular vertical stiffener 24 inside.
Are welded in the length direction at a predetermined pitch. Two corners of the vertical stiffener 24 are cut out so as not to interfere with the bent portion of the U-shaped steel plate 14B.

A base plate 25 is welded to the upper end of the rigid leg 4 so as to cover the opening of the U-shaped steel plate 14B. The base plate 25 faces the base plate 20 provided on the lower surface of one end of the main girder 6.

Reference numeral 26 denotes a base plate provided as required.
25 reinforcing members. Then, between the base plate 20 and the base plate 25, coupling means 27, 27 such as a desired number of bolts or the like are provided.
... are rigidly connected. A saddle 7 is welded to the lower end of the rigid leg 4, which will be described later.

Next, the swing leg portion will be described with reference to FIGS. The swing leg 5 is composed of the U-shaped steel plate 14C and the flange steel plate 1 described above.
It is composed of 5C, and its contents include a substantially rectangular vertical stiffener
28 are welded in the length direction at a predetermined pitch. Two corners of the vertical stiffener 28 are cut out so as not to interfere with the bent portion of the U-shaped steel plate 14C.

On both outer surfaces of the U-shaped steel plate 14C at the upper end of the swing leg 5, reinforcing members 29, 29 as shown in FIG.
Are welded, and an insertion hole 30 through which the swing leg mounting shaft 22 is inserted is formed in this portion. And
The upper end of the swing leg 5 is fitted into a frame 21 provided on the lower surface of one end of the main girder 6, and the above-described insertion hole 23 and the swing leg mounting shaft 22 are inserted therethrough. As a result, the swing leg 5 is
Is pivotally attached to the shaft. Reference numeral 31
Is a key plate for preventing the rocking leg mounting shaft 22 from coming off. A saddle 7 is welded to the lower end of the swing leg 5, and this portion will be described later.

Next, the saddle portion will be described with reference to FIGS. 10 and 11. FIG. The saddle 7 is generally constituted by a central body portion 32 and drive unit portions 33, 33 welded to both end portions thereof, respectively. The central body portion 32 is formed by the above-described U-shaped steel plate 14.
D and a flanged steel plate 15D, the contents of which are welded with a substantially rectangular vertical stiffener 34. The two corners of the vertical stiffener 34 are cut out so as not to interfere with the bent portion of the U-shaped steel plate 14D.

Side plates 35, 35 are welded to both ends of the U-shaped steel plate 14D to cover the openings. The drive units 33, 33 are integrally welded to the extended portions of the side plates 35, 35 and the flange steel plate 15D, respectively. In the drive unit 33,
The traveling wheels 11, 11 described above are rotatably mounted on a shaft, and are driven to rotate by a traveling motor 10. Reference numeral 36
Is a traveling buffer provided at the tip of the drive unit 33 to reduce the impact.

The saddle 7 configured as described above can obtain a desired wheelbase saddle by changing the length of the central body portion 32. Then, on the saddle member 7, the rigid leg 4 and the swing
And, as shown in FIG.
It is integrated.

The bridge type crane according to the present invention configured as described above has
By a control means such as a push button switch, not shown,
It can be used like a normal bridge crane.

(Effects of the Invention) Since the present invention is configured as described in detail above, it has the following tremendous effects.

Since the main girder member, leg member and central body member of the saddle, which are the main structural members of the bridge type crane, are configured with the same shape,
Standardization becomes possible in the production of cranes, which enables mass production and total cost reduction.

Moreover, since these main structural members of the bridge type crane are shared, setup before production of common members is possible, and crane can be manufactured by cutting or welding and joining immediately after receiving an order for the crane, greatly shortening the construction period. I can plan. In addition, it is possible to eliminate hand-held work at the factory.

The common use of each member makes it possible to reuse the remaining material, thereby eliminating waste of material removal.

In addition, since the leg members of the rigid leg and the swing leg have a single structure in which they are vertically erected, it is easy to manufacture the legs, and the structure of the crane is simple and excellent in appearance.

Further, since the main girder member, the leg member, and the center main body member of the saddle are all made of a single straight material, the number of transporters can be reduced and the transport cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the bridge type crane according to the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a right side view of FIG. 1, and FIG. FIG. 5 is a perspective view for explaining a U-shaped steel plate and a flange steel plate, FIG. 5 is a front view of a main part of FIG. 1 with a part omitted, FIG. 6 is a view taken along the line VI-VI of FIG. FIG. 5 is a view taken along line VII-VII of FIG. 5, and FIG. 8 is a view taken along line VIII-VII of FIG.
FIG. 9 is a view taken along line VIII, FIG. 9 is a view taken along line IX-IX in FIG. 5, FIG.
The figure is a front view of the saddle portion, and FIG. 11 is a view taken along the line XI-XI in FIG. 3 Bridge cranes 4 Rigid legs 5 Rocking legs 6 Main girder 7 Saddle 14 U-shaped steel plate 15 Flange steel plate

Claims (1)

(57) [Scope of request for utility model registration] 1. A steel plate having a predetermined length, comprising: a main girder member; rigid leg and swing leg leg members supporting the main girder member; and main structural members of a saddle center body member supporting the leg members. Is bent into a U-shaped cross section to form a U-shaped steel plate, and the steel plate is welded to an opening edge of the U-shaped steel plate, and is made of a member having the same shape as a closed cross section. A bridge-type crane characterized by a single structure in which each leg member stands vertically.