JPH09110367A - Mobile crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crane that is able to convey a load extending over a long distance in the horizontal direction, and being travelable. SOLUTION: Each of bases 5 and 8 is mounted on respective rear bodies 1b and 2b of two trucks 1 and 2, and each of corresponding supports 6, 7, 9 and 10 is supported by these bases 5 and 8. Both ends of a girder 3 are supported by the corresponding supports 6 and 9 on these trucks 1 and 2 rotatably in all directions, and likewise both end of a girder 4 are supported by the corresponding supports 7 and 10 on these trucks 1 and 2 rotatably in all directions.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a mobile crane.

[0002]

2. Description of the Related Art There is a need for a mobile crane capable of transporting a load over a considerably long distance in a horizontal direction at a road construction site or a construction site and easily moving to a desired site.

[0003]

However, the reality is that there is no mobile crane that meets such requirements.

[0004]

According to the present invention, in order to satisfy the above-mentioned requirements, the trolley traveling gutter is rotated at about 90 degrees or more about a vertical axis on a moving vehicle which can travel independently at both ends thereof. We support as much as possible.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 (A) and 1 (B), reference numerals 1 and 2 are independently movable first and second, respectively.
The moving vehicles 3 and 4 are trolley traveling garters that are parallel to each other and extend substantially horizontally. In the embodiment shown in FIGS. 1 (A) and 1 (B), each of the moving vehicles 1 and 2 is composed of a truck, and 1a and 2a are driver's seats of the truck.
Reference numerals 2b respectively denote the bed of the truck. A base 5 is placed on the loading platform 1b of the truck 1, and a pair of columns 6 and 7 are supported on the base 5. On the other hand, the base 8 is also mounted on the loading platform 2b of the truck 2, and the pair of support columns 6 and 7 are supported on the base 8. Both ends of one garter 3 are respectively supported by a strut 6 of the truck 1 and a strut 9 of a truck 2, and both ends of the other garter 4 are supported by a strut 7 of the truck 1 and a strut 10 of the truck 2. ing.

As shown in FIGS. 1 (A) and 1 (B), the columns 6 and 7 of the track 1 are spaced apart from each other in a direction oblique to the traveling direction of the track 1, and the columns of the track 2 are spaced apart from each other. 9 and 10 are also arranged at intervals in a direction oblique to the traveling direction of the track 2. As shown in FIG. 1B, a pair of trolleys 11 and 12 that runs along the garter 4 are attached to the garter 4. Although not shown in the figure, a pair of trolleys are similarly attached to the garter 3. In addition, in the embodiment shown in FIGS. 1A and 1B, each gutter is made of I-type steel.

FIGS. 2A and 2B show the column 6 of the truck 1. The column 7 provided for the garter 4 has the same structure as the column 6, and therefore the description of the column 7 will be omitted. Referring to FIG. 2, the pillar 6
Comprises a body portion 6a fixed on the base 5 and a rotary head 6b mounted on the body portion 6a via a bearing 13 so as to be rotatable about a vertical axis. In the embodiment shown in FIG. 2B, the main body portion 6a is formed of a simple cylinder, but the main body portion 6a may be formed of a hydraulic cylinder so that the rotary head 6b can be moved up and down.

As shown in FIG. 2A, the rotary head 6b
Is a pair of flanges 14 spaced apart from each other,
15, both ends of a shaft 16 extending between the flanges 14 and 15 are supported by the flanges 14 and 15 via sleeves 17 and 18, respectively. On the other hand, gata 3
Is connected to a cylindrical body 19 inserted around the shaft 16, and a spherical bearing 20 is provided between the shaft 16 and the cylindrical body 19.
Is inserted. Therefore, the garter 3 can freely rotate in any direction with respect to the rotary head 6b. The column 7 also has a rotary head having the same structure as the rotary head 6b,
Therefore, the garter 4 can also freely rotate in all directions with respect to the rotating head of the column 7.

FIG. 3 shows the column 9 of the truck 2.
The support column 10 provided for the garter 4 has the same structure as the support column 9, and therefore the description of the support column 10 will be omitted. Referring to FIG. 3, the support column 9 includes a main body portion 9a fixed on the base 8, and a rotary head 9b mounted on the main body portion 9a via a bearing 21 so as to be rotatable about a vertical axis. To do. In the embodiment shown in FIG. 3, the main body portion 9a is formed of a simple cylinder, but the main body portion 6a may be formed of a hydraulic cylinder so that the rotary head 9b can be moved up and down.

As shown in FIGS. 3 and 4 (A), the rotary head 9b is provided with a pair of flanges 22 and 23 spaced apart from each other, and a U-shape is provided on the top of each flange 22 and 23. Grooves 24 and 25 are formed. A shaft 29 of a garter suspension unit 28 is fitted in the U-shaped grooves 24, 25 via sleeves 26, 27. The garter suspension unit 28 includes a cylindrical body 30 inserted around a shaft 29, and a spherical bearing 31 is inserted between the cylindrical body 30 and the shaft 29. Also, the shaft 29
A pair of plates 32 and 33 are fixed to both ends of the roller, and two pairs of rollers 34 and 35 rolling on the lower surface of the upper flange of the I-shaped steel forming the garter 3 are rotated by the corresponding plates 32 and 33, respectively. It is supported as much as possible.

In the state shown in FIGS. 3 and 4, the garter suspension unit 28 is supported by the rotary head 9b via the shaft 29 of the garter suspension unit 28, and the garter 3 is supported by the rollers 34 and 35. Supported by the garter suspension unit 28. Since the spherical bearing 31 is inserted between the shaft 29 and the cylindrical body 30 as described above, the garter 3 can freely rotate in any direction with respect to the rotary head 9b. Further, since the garter 3 is supported by the garter suspension unit 28 via the rollers 34 and 35, the garter 3 can freely move in the longitudinal direction of the garter 3 with respect to the garter suspension unit 28. As shown in FIG. 3, stop members 36 and 37 that engage with the plate 32 of the garter suspension unit 28 and restrict the relative movement range between the garter suspension unit 28 and the garter 3 are mounted on the garter 3. Has been.

A garter suspension unit having the same structure as the garter suspension unit 28 is also provided for the support column 10 for supporting the garter 4. Therefore, the garter 4 can freely rotate in any direction with respect to the rotating head of the column 10, and the garter 4 can freely move in the longitudinal direction of the garter 4 with respect to the hanger suspension unit. When the shaft 29 of the garter suspension unit 28 is lifted upward, the shaft 29 is moved to the U of the flanges 22 and 23 of the rotary head 9b.
It is detached from the groove 24, 25. Therefore, the garter suspension unit 28 together with the garter 3 can be removed from the rotary head 9b of the support column 9. Similarly, the gutter 4 and the corresponding gutter suspension unit can be removed from the rotating head of the column 10.

FIG. 5 shows the trolley 11 shown in FIG. 1 (B). As shown in FIG. 5, the trolley 11 is supported by a pair of rollers 38 so as to be able to travel along the garter 4, and the hoist 39 is supported by the trolley 11. A rack 40 is fastened to the lower surface of the garter 4, and the trolley 11 is caused to travel along the garter 4 by rotating a pinion 41 that meshes with the rack 40. The other trolley 12 shown in FIG. 1 (B) and the trolley not shown in the figure but attached to the garter 3 have the same structure as the trolley 11 shown in FIG.

Returning to FIGS. 1A and 1B again, FIG.
(A) and (B) show a place where work is being performed at a road construction site or a construction work site. That is, at this time, the tracks 1 and 2 are laterally spaced from each other, and the trolleys 11 and 1 are located between the tracks 1 and 2.
2 moves the luggage. At this time, the garters 3 and 4 can freely rotate in all directions with respect to the corresponding struts 6, 7, 9, and 10, and the garters 3 and 4 can be rotated with respect to the corresponding struts 9 and 10. Since they can be moved relative to each other in the longitudinal direction, the relative positional relationship between the track 1 and the track 2 has no influence on the bearing action of each garter 3, 4. That is, in other words, even if the height of the ground with respect to the track 1 is different from the height of the ground with respect to the track 2, no problem occurs, and the tracks 1 and 2 are not displaced in the front-rear direction or are not parallel to each other. However, it will not cause any problems.

When a crane consisting of a pair of garters 3 and 4 is moved by a short distance, it is necessary to carry out the operation shown in FIGS. 1 (A) and 1 (B).
In the state shown in (2), both tracks 1 and 2 or one of the tracks may be slightly moved. On the other hand, when moving a crane consisting of a pair of garters 3 and 4 over a long distance, the trucks 1 and 2 are aligned along the traveling direction as shown in FIG. Of the garters 3 and 4 are supported by the columns 9 and 10 of the truck 2. That is,
The garters 3 and 4 are shown in FIG.
The state shown in FIG. 6A is brought into the state shown in FIG. 6 by rotating the state shown in FIG. 6A by approximately 90 degrees. At this time, the garters 3 and 4 also rotate approximately 90 degrees with respect to the columns 9 and 10. Therefore, in the present invention, each garter 3, 4 has a corresponding stanchion 6, 7, 9, 1.
It is necessary to be able to rotate about 90 degrees or more around the vertical axis with respect to 0.

There are two methods for moving from the state shown in FIG. 1A to the state shown in FIG. One method is to attach the ends of each gutter 3, 4 to the corresponding columns 6, 7, 9,
In this method, the tracks 1 and 2 are moved from the position shown in FIG. 1A to the position shown in FIG. 6 by moving the positions of the tracks 1 and 2 while being supported by 10. In the other method, one end of each garter 3, 4 is once detached from the corresponding stanchion 9, 10 and then the track 2 is removed as shown in FIG.
Move from the position shown in (A) to the position shown in FIG. 6, and then move each garter 3, 4 about 90 around the corresponding stanchions 6, 7.
This is a method in which the ends of the garters 3 and 4 are again supported by the corresponding columns 9 and 10 after being rotated once. Similarly, FIG.
There are two methods described above when changing from the state shown in FIG. 1 to the state shown in FIG.

The columns 6 and 7 are arranged obliquely to the traveling direction of the track 1, and the columns 9 and 10 are arranged obliquely to the traveling direction of the track 2.
This is to prevent the garters 3 and 4 from interfering with each other when the state shown in FIG.
When the truck 1 advances in the state shown in FIG. 6, the stop member 36 of the garter 3 comes into contact with the plate 32 of the garter suspension unit 28, and thus the truck 2 is pulled by the truck 1. Of course, in this case, the rear part of the track 1 and the front part of the track 2 may be connected to a wire, and the track 2 may be pulled by this wire.

FIG. 7 shows another embodiment. In this embodiment, the same components as those in the embodiment shown in FIG. 1A are designated by the same reference numerals. In this embodiment, turntables 50 and 51 are rotatably mounted on the loading platforms 1b and 2b of the trucks 1 and 2, respectively. The columns 6 and 7 are on the turntable 50, and the columns 9 and 10 are the turntable 51.
Each is supported above. In this case, it is not necessary that the rotary heads 6b, 9b of the columns 6, 7, 9, 10 be rotatable with respect to the corresponding main body portions 6a, 9a. In this embodiment, when the trucks 1 and 2 are aligned in the traveling direction in order to move the crane composed of the garters 3 and 4 over a long distance, as shown in FIG.
0,51 is rotated about 90 degrees.

[0019]

(Effect of the Invention) A mobile crane capable of transporting loads over a considerable distance in the horizontal direction and easily movable is provided.

[Brief description of the drawings]

FIG. 1 is an overall view of a mobile crane according to the present invention, (A) is a plan view and (B) is a side view.

FIG. 2 is a view showing one of the columns, (A) is (B)
FIG. 3 is a cross-sectional view taken along line AA of the side view shown in FIG.

FIG. 3 is a side view showing the other column.

4A is an enlarged view of a part of FIG. 3, in which FIG. 4A is a plan sectional view, and FIG. 4B is a sectional view taken along line BB in FIG.

FIG. 5 is a side view of the trolley.

FIG. 6 is a plan view of the mobile crane showing a moving state.

FIG. 7 is a plan view of a mobile crane showing another embodiment.

FIG. 8 is a plan view of the mobile crane showing a moving state.

[Explanation of symbols]

 1, 2 ... Trucks 3, 4 ... Garters 6, 7, 9, 10 ... Struts 11, 12 ... Trolley

Claims (1)

[Claims] 1. On a moving vehicle that can travel independently on both ends of a trolley traveling garter, there is approximately 9 around a vertical axis.
A mobile crane supported so that it can rotate 0 degrees or more.