JPH11189396A - Jib crane outrigger device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jib crane outrigger device that is easily installed on inclined ground. SOLUTION: A jib crane outrigger device comprises upper and lower pins 19 and 20 for coupling in pairs the base of outrigger beams 12 to a base frame 11 so that they are radially extended from the center or base frame 11, links 13 for receiving at their one end the upper or lower pin 19 or 20 inserted therethrough, link pins 25 each for coupling the other end of the link 13 to the base of the outrigger beam 12, height adjusting mechanisms 14 each adapted to be attached to the tip of the outrigger beam 12 and provided with a pedestal 28 adapted to be moved substantially vertically, and brackets 15 each adapted to be interposed between the tip of the outrigger beam 12 and the height adjusting mechanism 14 so as to support the height adjusting mechanism 14 roughly vertically when the base of the outrigger beam 12 is coupled to the base frame 11 by means of the link 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outrigger device of a jib crane used for construction of a steel tower in a mountainous area.

[0002]

2. Description of the Related Art FIG. 6 shows an example of an outrigger device of a conventional jib crane. The outrigger device of this jib crane includes a base frame 2 on which a crane revolving unit 1 is supported and a base frame 2 as viewed from above. A plurality of outrigger beams 4 arranged radially at the center and each having a base end fastened to the side of the base frame 2 by a bolt 3.

[0003] The crane swing body 1 is pivotally supported at the base end of a jib 5, and is provided with a jib hoisting winch 6 and a hoisting winch 7.

When the jib crane is used on the slope 8, a column 9 is erected on the slope 8, and work is performed between the upper end of the column 9 and a portion of the slope 9 above the column 9. The table 10 is installed substantially horizontally, and the base frame 2 and the outrigger beam 4 are set on the upper surface of the work table 10.

[0005]

However, prior to the installation of the jib crane, it is not easy to erect the support 9 on the slope 8 or to install the work table 10 between the support 9 and the slope 8.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide an outrigger device for a jib crane that can be easily installed on a slope.

[0007]

According to an aspect of the present invention, there is provided an outrigger device for a jib crane according to the present invention, wherein a base frame on which a crane revolving body is supported and a base frame as viewed from above are centered. A plurality of outrigger beams radially arranged on the base frame, an upper pin extending substantially horizontally and being able to fasten the upper end of the base end of each outrigger beam to the upper part of the base frame, and the lower end of the base end of each outrigger beam extending substantially horizontally. A lower pin that can be fastened to the lower side of the base frame; a link provided for each base frame and through which an upper pin or lower pin can be inserted at one end; an outrigger beam that extends substantially horizontally and has the other end of each link A link pin that can be fastened to the upper or lower end of the outrigger; A height adjustment mechanism having a pedestal that can move up and down substantially vertically when the base end of the beam is fastened to the base frame with the upper pin and the lower pin, and between the tip of each outrigger beam and the height adjustment mechanism The base end of the outrigger beam that can be interposed and has an upper pin, a lower pin,
And a bracket for supporting a height adjusting mechanism so that the pedestal can move up and down substantially vertically when fastened to the base frame with the link and the link pin.

According to the outrigger device for a jib crane described in claim 2 of the present invention, in addition to the configuration of the outrigger device for jib crane described in claim 1 of the present invention, the jig crane is mounted directly or via a bracket on the tip end of an outrigger beam. A screw shaft screwed into the case and having a lower end and an upper end protruding outward from the case, a pedestal attached to a lower end of the screw shaft, and an upper end of the screw shaft. And a height adjustment mechanism having a handle.

In any of the outrigger devices for a jib crane according to the first or second aspect of the present invention, the upper end of the outrigger beam is fastened to the upper portion of the base frame with an upper pin, and the base end of the outrigger beam. Fasten the lower part to the lower part of the base frame with the lower pin,
Set the outrigger beam to the normal state.

The upper end of the base of the outrigger beam is fastened to the upper portion of the base frame with an upper pin, and the lower portion of the base of the outrigger beam is fastened to the lower portion of the base frame with a link pin, a link and a lower pin. Then, the outrigger beam is set in a state where the front end is directed upward.

Further, the base lower portion of the outrigger beam is fastened to the lower portion of the base frame with a lower pin, and the base upper portion of the outrigger beam is fastened to the upper portion of the base frame with a link pin, a link and an upper pin. Then, the outrigger beam is set in a state where the front end portion faces downward.

In the outrigger device for a jib crane according to the second aspect of the present invention, the pedestal is raised and lowered together with the screw shaft by rotating the handle on the upper side of the case, and the vertical position of the pedestal is adjusted.

[0013]

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

FIGS. 1 to 5 show an embodiment of an outrigger device for a jib crane according to the present invention.

The outrigger device of the jib crane is used for connecting a base frame 11, four outrigger beams 12 extending radially around the base frame 11, and a connection between the outrigger beam 12 and the base frame 11. Multiple links 13 and outrigger beam 1
2 and a bracket 15 that can be interposed between the height adjustment mechanism 14 and the tip of the outrigger beam 12 as needed.

The base frame 11 has a cylindrical frame body 16 having annular flanges at upper and lower ends, and four sets provided on the outer peripheral surface of the frame body 16 so that the outrigger beam 12 can be connected to the base frame 11. And a bracket 17 for mounting the crane revolving body 18 on the frame body 16 so as to be revolvable.

Each of the mounting brackets 17 is arranged two by two at the base end width of the outrigger beam 12 with the center line a of the outrigger beam 12 interposed therebetween.

A pin hole 21 through which an upper pin 19 extending in a substantially horizontal direction orthogonal to the center line a is inserted, and a pin hole 21 is formed in an upper portion of two adjacent mounting brackets 17. In the lower part of the bracket 17, a pin hole 22 through which the lower pin 20 is inserted is inserted in parallel with the upper pin 19.
Are drilled.

The outrigger beam 12 has a tapered shape whose cross section gradually decreases from the base end to the tip.
The upper and lower portions of the base end are formed so as to be inserted between the two adjacent mounting brackets 17, and the upper pin 19 and the lower pin 20 can be inserted through the inserted portion. Pin holes 32 and 33 are formed.

At the tip of the outrigger beam 12, a flange 23 orthogonal to the center line a of the outrigger beam 12 is provided.

As shown in FIG. 4, the link 13 is provided so as to be interposed between each mounting bracket 17 provided on the frame body 16 and the base end of the outrigger beam 12.
A pin hole 24a through which the upper pin 19 or the lower pin 20 can be inserted is formed at one end, and a pin hole 24b through which the link pin 25 is inserted is formed at the other end formed in a forked fork shape. Has been drilled.

The upper pin 19, the lower pin 20, and the link pin 25 are formed in the same shape so that the link pin 25 can be inserted into the pin holes 32, 33 of the outrigger beam 12.

The height adjusting mechanism 14 is hollow and has a flat side surface on one side, and the vicinity of a lower portion of the side surface is close to the outrigger beam 1.
A case 26 which can be bolted to a flange 23 provided at the tip of the case 2;
6, a screw shaft 27 which is screwed so as to be able to advance and retreat in the longitudinal direction, a pedestal 28 provided at an end of the screw shaft 27 protruding outside the lower end of the case 26, and an upper end of the case 26 of the screw shaft 27 Handle 2 fitted to the end protruding outside
9 is provided.

As shown in FIG. 5, the bracket 15 has a truncated V-shape in which left and right fastening surfaces 30 and 31 face each other at a predetermined angle when viewed from the side. The ends of the base frame 1 are defined by upper pins 19, lower pins 20, links 13 and link pins 25.
1, the pedestal 28 can be raised and lowered substantially vertically with respect to the case 26 by interposing the flange 23 at the tip of the outrigger beam 12 and the height adjusting mechanism 14 and fastening them together. In addition, the height adjustment mechanism 14 can be erected substantially vertically.

When the jib crane to which the outrigger device of the jib crane shown in FIGS. 1 to 5 is applied is installed on the slope 8, for example, when the height adjusting mechanism 14 is arranged at a position substantially equal to the height of the base frame 11, FIG. As shown in 3,
An upper part of the base end of the outrigger beam 12 is fastened to an upper part of the base frame 11 by an upper pin 19, and a lower part of the base end of the outrigger beam 12 is fastened to a lower part of the base frame 11 by a lower pin 20. The beam 12 is set to an ordinary substantially horizontal state, and the case 26 of the height adjusting mechanism 14 is directly bolted to the flange 23 at the tip of the outrigger beam 12, and the height adjusting mechanism 1
4 stands almost vertically.

When the height adjustment mechanism 14 is disposed at a position higher than the height position of the base frame 11, as shown on the A side of FIG. 19, the lower part of the base end of the outrigger beam 12 is connected to the lower part of the base frame 11 by the lower pin 20 via the link 13 connected to the lower part of the base end by the link pin 25. By the fastening, the outrigger beam 12 is set in a state where the tip thereof faces upward, and the flange 23 at the tip of the outrigger beam 12 is attached to both side fastening surfaces 30 and 31.
Height adjustment mechanism 1 via bracket 15 with
No. 4 case 26 is bolted, and the height adjustment mechanism 14 is set up substantially vertically.

Further, when the height adjustment mechanism 14 is disposed at a position lower than the height position of the base frame 11, as shown on the side B in FIG. The upper part of the base frame 11 is fastened to the lower part of the base frame 11 by the pin 20, the upper part of the base end of the outrigger beam 12 is connected to the upper part of the base frame 11 by the link pin 25 connected to the upper part of the base end by the link pin 25 The outrigger beam 12 is fastened to
The tip of the outrigger beam 12 is set to a state in which the tip faces downward.
The case 26 of the height adjusting mechanism 14 is bolted via the bracket 15 with the upper surface 31 upward, and the height adjusting mechanism 1
4 stands almost vertically.

The case 26 of each height adjustment mechanism 14
The height of the tip of each outrigger beam 12 is adjusted by rotating the screw shaft 27 through the handle 29 above the pedestal 28 with respect to the case 26 to adjust the height and posture of the jib crane. .

As described above, in the outrigger device of the jib crane shown in FIGS.
2 is fastened to the upper part of the base frame 11 with the upper pin 19, and the lower part of the base end of the outrigger beam 12 is
The outrigger beam 12 is fastened to the lower side of the base frame 11 with the link pin 25, the link 13, and the lower pin 20 so that the distal end thereof is directed upward. The outrigger beam 12 is fastened to the lower portion of the base frame 11 by the pin 20, and the upper end of the outrigger beam 12 is fastened to the upper portion of the base frame 11 by the link pin 25, the link 13 and the upper pin 19. The tip portion can be turned downward, and by rotating the screw shaft 27 through the handle 29 on the upper side of the case 26, the pedestal 28
Can be raised and lowered with respect to the case 26 and the vertical position of the pedestal 28 can be easily adjusted, so that the jib crane can be easily installed on the sloped ground, and the efficiency of lifting work on the sloped ground can be improved.

The outrigger device of the jib crane according to the present invention is not limited to the above-described embodiment, but includes a spherical joint between the lower end of the screw shaft of the height adjusting mechanism and the pedestal. It goes without saying that various changes can be made without departing from the scope of the present invention.

[0031]

As described above, according to the outrigger device for a jib crane of the present invention, various excellent effects as described below can be obtained.

(1) Claim 1 or Claim 2 of the present invention
In any of the outrigger devices of the jib crane described in the above, the upper end of the outrigger beam is fastened to the upper portion of the base frame with the upper pin, and the lower end of the outrigger beam is connected to the base with the link pin, link and lower pin The outrigger beam is fastened to the lower part of the frame so that the tip end faces upward.The lower part of the base end of the outrigger beam is fastened to the lower part of the base frame with a lower pin, so that the base of the outrigger beam is The upper end is fastened to the upper portion of the base frame with a link pin, a link and an upper pin, so that the tip of the outrigger beam can face downward, so that the jib crane can be easily installed on a slope, and The efficiency of the lifting operation can be improved.

(2) In the outrigger device for a jib crane according to the second aspect of the present invention, the pedestal is moved up and down with respect to the case by rotating a screw shaft through a handle on the upper side of the case, and the outrigger beam is moved. The vertical position of the pedestal with respect to the tip of the pedestal can be easily adjusted.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of an embodiment of an outrigger device for a jib crane according to the present invention.

FIG. 2 is a plan view of the outrigger device related to FIG. 1;

FIG. 3 is a side view showing another example of a fastening form between the outrigger beam and the base frame related to FIG. 1;

FIG. 4 is a plan view when the base frame and the base end of the outrigger beam related to FIG. 1 are fastened via a link.

FIG. 5 is a side view of the bracket associated with FIG. 1;

FIG. 6 is a side view showing an example of a conventional jib crane.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crane revolving body 11 Base frame 12 Outrigger beam 13 Link 14 Height adjustment mechanism 15 Bracket 19 Upper pin 20 Lower pin 25 Link pin 26 Case 27 Screw shaft 28 Pedestal 29 Handle

Claims (2)

[Claims] 1. A base frame on which a crane rotating body is supported, a plurality of outrigger beams radially arranged around the base frame when viewed from above, and a base extending substantially horizontally and having an upper base end of each outrigger beam as a base. An upper pin that can be fastened to the upper portion of the frame, a lower pin that extends substantially horizontally and that can fasten the lower end of the base end of each outrigger beam to the lower portion of the base frame, and an upper pin that is provided for each base frame and is provided at one end. Alternatively, a link through which a lower pin can be inserted, a link pin extending substantially horizontally and the other end of each link can be fastened to the upper or lower base end of the outrigger beam, and a link pin that can be attached to the distal end of each outrigger beam A pedestal that can be raised and lowered substantially vertically when the base end of the outrigger beam is fastened to the base frame with the upper pin and the lower pin. Having a height adjustment mechanism, which can be interposed between the distal end of each outrigger beam and the height adjustment mechanism and the base end of the outrigger beam has an upper pin, a lower pin,
An outrigger device for a jib crane, comprising: a bracket that supports a height adjusting mechanism so that a pedestal can move up and down substantially vertically when fastened to a base frame with a link and a link pin. 2. A case which can be mounted directly or via a bracket on a tip end of an outrigger beam, a screw shaft screwed into the case and having a lower end and an upper end protruding outward from the case, and the screw shaft. The outrigger device for a jib crane according to claim 1, further comprising a height adjustment mechanism having a pedestal attached to a lower end of the screw shaft and a handle attached to an upper end of the screw shaft.