1. Field of the Invention
This invention relates to an engine-driven work machine, which is driven by an engine while performing work, and more particularly relates to an engine-driven work machine such as an electric power generator, a welding machine, and the like, that is attached to a pipe frame in a transportable constitution.
2. Description of the Related Art
This type of engine-driven work machine is often attached to a pipe frame, such as that disclosed in Japanese Patent Laid-Open No. 1997- 217632, in order to make it easier to handle when moving and transporting it around the work place.
Large machines are fitted with sling fittings, which interlock with members for slinging such as hooks and ropes, so that the machines can be lifted by crane. Japanese Utility Model Laid-open No. 1984-015680 and Japanese Utility Model Laid-open No. 1989-062971 illustrate a large engine-driven work machine that has this type of sling fitting.
Small engine-driven work machines are attached to pipe frames, and do not have the sling fittings of the larger machines.
However, when using a small machine outdoors, even though it is desirable that it should be possible to move and transport the small machine by crane and the like, the structure is not suitable for slinging.
This invention has been realized in view of the above points, and aims to provide an engine-driven work machine that is attached to a pipe frame and has a structure suitable for slinging.
In order to achieve these objects, this invention provides the invention described in aspects one to four.
In the first aspect, this invention provides an engine-driven work machine comprising a transportable structure that is attached to a pipe frame, a sling fitting being provided above the pipe frame and rotatably connected thereto.
In the second aspect, the engine-driven work machine of the first aspect comprises a stopper which stops the rotation of the sling fitting in a near-vertical direction.
In the third aspect, the engine-driven work machine of the first aspect comprises a shock-absorber on the side of the sling fitting.
In the fourth aspect, in the engine-driven work machine of the first aspect, the sling fitting has a bent section, which extends at a right-angle to the bottom edge of a center section, and bent sections, which are approximately C-shaped in plan view and are provided near both ends of the sling fitting.
This invention obtains the following effects.
According to the invention of the first aspect, the engine-driven work machine can be handled normally by using a pipe frame, and in addition, by raising the sling fitting, which is usually in a collapsed position, the engine-driven work machine can be lifted by a crane or the like.
According to the invention of the second aspect, the rotation of the sling fitting is stopped in a near-vertical direction, so that the stopper connects with the sling fitting at a predetermined position, enabling the engine-driven work machine to be lifted in a stable state.
According to the invention of the third aspect, the shock-absorber prevents collision with the surface of the work machine main body even when the sling fitting is collapsed.
According to the invention of the fourth aspect, the sling fitting has a bent section for increasing its rigidity, whereby the weight of the sling fitting can be reduced.
Preferred embodiments of the invention will be explained with reference to the accompanying diagrams.
A collapsible sling fitting 20 is provided on the top of the pipe frame 11 at a position corresponding to the center of gravity of the work machine. The sling fitting 20 has a hole for slinging 21a and an elastic shock-absorber 21b that are formed in the center section of an approximately mountain-shaped plate, bent sections for hinges 22 that are formed at each end of the plate, and a bending edge section 23 for strengthening, which extends along the center bottom edge of the plate at a right-angle to the center section 21.
To make the structure lighter, in addition to the hole for slinging 21a, holes are provided in the sling fitting 20 by partially removing the material. Furthermore, to increase the local rigidity of the sling fitting 20, bent sections that are approximately C-shaped in plan view are formed near each end of the sling fitting 20 to increase its bending strength.
The sling fitting 20 is bend-processed so that the center of the hole for slinging 21a and the rotational centers of hinge sections 22a lie approximately in the same perpendicular face. Consequently, when the engine-driven work machine 10 is lifted by a crane or the like, a force acts evenly on the hinge sections 22a, making it possible to lift the center of gravity of the work machine in a balanced state.
The sling fitting 20, which can be rotated around the hinge, is usually collapsed in the position shown by the broken line in
Therefore, usually, (e.g. when the engine-driven work machine is being stored) the collapsed sling fitting 20 protrudes no further than the height of the pipe frame 11. Thus only the engine-driven work machine 10 need be packed away, and it can be packed away above or below other machines.
As shown in
The lubricous washer 22e and the looseness-preventing nut 22g are used in order to firmly secure the sling fitting 20 with the bolt 22c, and hold it firmly in place. The stopper 11b supports the sling fitting 20, and also stops it from colliding with the lid of a fuel tank that is provided below the sling fitting 20.
Embodiment 2
As shown in
As shown in
As shown in
The bent sections 22 at the ends of the sling fitting 20 have hinge sections 22a, which are nearly at right-angles to the side sections 24, and, as shown in
Embodiment 3
Number | Date | Country | Kind |
---|---|---|---|
2004-006746 | Jan 2004 | JP | national |
Number | Name | Date | Kind |
---|---|---|---|
1769134 | Haff | Jul 1930 | A |
3606438 | Feczko | Sep 1971 | A |
5012553 | Hardigg et al. | May 1991 | A |
5845978 | Jung | Dec 1998 | A |
6092768 | Larson et al. | Jul 2000 | A |
6181019 | Frank | Jan 2001 | B1 |
Number | Date | Country |
---|---|---|
59-15680 | Jan 1984 | JP |
1-62971 | Apr 1989 | JP |
09-052690 | Feb 1997 | JP |
09-217632 | Aug 1997 | JP |
Number | Date | Country | |
---|---|---|---|
20050166690 A1 | Aug 2005 | US |