JP2538203Y2 - Construction Machine Swing Frame - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swing frame for a construction machine that supports a working part such as a hydraulic shovel or the like for carrying out construction work, a cab or an engine, and turns horizontally.

[0002]

2. Description of the Related Art As shown in FIG. 10, a conventional hydraulic excavator 1 supports a swing frame 6 via a swivel bearing 4 on an airframe provided with a traveling device 2 composed of a caterpillar. On the swing frame 6, a front 12 composed of an arm and a boom having a bucket 10 at the tip, a cab 14, a hydraulic device 18, an engine 16, and the like disposed at the rear of the cab 14 are arranged to form an upper revolving unit 8 This is mounted on the traveling device 2 so as to be pivotable.

As shown in FIG. 11, the swing frame 6 is constructed by arranging side frames 22 on both sides of a main frame 20 at the center. The main frame 20 is rotatably supported at the center of the body supported by the traveling device 2 via a swivel bearing 4. The main frame 20 directly travels the weight of the front 11 and the engine 12 borne by the main frame 20. The information is transmitted to the device 2. The side frames 22 arranged on both sides of the main frame 20 are equipped with a cab 14, a hydraulic device 18, a fuel tank, a hydraulic oil tank, and the like. And this side frame 22 is the main frame
It is composed of a horizontal member such as a cross beam 24 projecting from both sides from 20 and a skirt plate 26 as a vertical girder connecting these members.

[0004]

In the conventional swing frame 6 as shown in FIG. 11, a main member such as a cross beam 24 and a skirt plate 26 is welded at a welding portion 27 by using a shape steel as shown in FIG. The frame structure is integrally formed by joining, and therefore, the welding portion of the swing frame 6 is formed.
27 is required to be a part with a complicated shape.

By the way, the hydraulic excavator 1 often works in a narrow place such as a hole formed underground or in a mountain where terrain changes a lot. Therefore, the skirt plate 26 which forms the side surface of the side frame 22 collides with a surrounding obstacle at the time of turning, and is easily damaged such as being deformed by the impact. However, as described above, since the welded portion 27 of the swing frame 6 is formed in a complicated structure that has entered,
Repairing the damaged skirt plate 26 is difficult, especially because of the difficulty in dimensional adjustment.
The problems described above are not limited to the hydraulic excavator, but also apply to other construction machines having a traveling device and a turning device.

Another problem is that the work is safe and
In order to perform the operation smoothly, it is often necessary to provide a lighting device, a horn, a catwalk (passageway), or other equipment for ensuring work safety according to the environment at the work site. However, conventional construction machines such as hydraulic shovels have not been provided with a means for easily attaching and detaching these safety devices as necessary.

[0007] The present invention has been obtained by focusing on the problems of the above-mentioned conventional construction machinery, and has a traveling device such as a hydraulic shovel and, if necessary, a bumper, an occupant protection frame, and a lighting device. It is an object of the present invention to provide a swing frame of a construction machine having means for detachably attaching a safety device of the present invention.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the construction of a swing frame of a construction machine according to the present invention is based on a swing frame of a construction machine which is swingably mounted on a traveling device via a swing bearing. At least both sides of the outer peripheral portion of the swing frame are formed of a metal plate, bolt holes having a predetermined pitch and arrangement are provided in the metal plate, and a safety device is mounted using the bolt holes. It is configured as follows.

The structure of the swing frame is generally a flat plate, but the shape is not particularly limited. That is, a main frame that supports members that generate dynamic loads such as a front and an engine that performs work such as excavation, and a side frame that is mounted on both sides thereof and has a cab, a hydraulic device, a fuel tank, a hydraulic oil tank, and the like. Can be used as it is.

In this case, the frame forming the outer peripheral portion of the swing frame refers to a skirt plate forming the outer peripheral surface of the side frame disposed on both sides of the main frame, and cross beams disposed on the front and rear surfaces of the side frame. ing. However, the bolt holes need not be provided in all of these frames, but may be provided in appropriate regions as needed.

The safety device is not limited to a specific device. In other words, the swing frame turns, and the shock absorber that absorbs the impact when colliding with an obstacle, a lighting device, an occupant protection frame, a safety device for a work environment such as a catwalk, and the like, are required at any time for construction work, It can be used as a safety device to be attached to a swing frame.

The specifications of the bolt holes, that is, the hole diameters, screw dimensions, intervals, pitches and numbers, are not fixed depending on the scale of the construction machine, but are determined in accordance with actual conditions. However, in order to maintain the compatibility of the safety equipment, it is preferable to have a regular pattern so as to have a mounting strength to the model of the construction machine and to maintain the compatibility of the safety equipment.

[0013]

[Operation] By providing a plurality of bolt holes for attaching safety devices to the outer frame material,
It can be used by being attached to a swing frame as needed, and acts to improve work efficiency according to the work environment. Moreover, the configuration of the present invention is extremely simple, and the safety device can be easily attached to and detached from the outer surface of the swing frame. Even when the safety device is heavy, a crane or the like can be easily used. Excellent in nature. In addition, by unifying the pitch and number of bolt holes provided on the side of the swing frame,
The safety equipment can be changed and attached according to each work, and the workability is excellent.

[0014]

[Embodiment] Hereinafter, the present invention will be described with reference to the attached drawings.
This will be described more specifically with reference to examples. The swing frame 1 of the present embodiment shown in FIG. 1 employs basically the same structure as the conventional swing frame 1 described with reference to FIG. 11, and the same members are denoted by the same reference numerals and description thereof is omitted. I do.

The skirt plate 26 forming the side surface of the side frame 22 uses a metal flat plate as shown in FIG.
This is integrally attached by welding to a cross beam 24 made of a shape steel projecting from the main frame 20. As shown in FIG. 1, the bolt holes 28 are arranged in two horizontal rows, the both ends in one vertical row, and the middle in two vertical rows so as to substantially divide the entire length of the skirt plate 26.

As shown in FIG. 2, the bolt hole 28 is formed by concentrically welding a nut 32 from an inner side surface of the plate 26 to an opening 30 provided in the skirt plate 26. The reason why the skirt plate 26 of this embodiment is made of a metal flat plate is to facilitate welding connection with the cross beam 24 and to facilitate dimensional adjustment during manufacture and repair. However, the present invention also allows the skirt plate 26 to be formed using a conventional shape steel.

The bolt holes 28 are also formed in the cross beam 24 'disposed on the front surface of the side frame 22.
That is, this cross beam 24 'was formed of a mold steel as shown in FIG. 3, and a bolt hole 28 was formed in the same pitch and pattern as those provided on the skirt plate 26. Next, with reference to FIGS. 4 to 9, a description will be given of a state in which various safety devices are attached using the bolt holes 28.

FIG. 4 shows a state in which a synthetic resin bumper 34, which is one of the safety devices, is attached to the skirt plate 26. The resin bumper 34 has an oval cross section and is formed so as to cover the side surface of the skirt plate 26, and a bolt 36 is screwed into the bolt hole 30 and attached to the plate 26. As understood from FIG. 4, this resin bumper
Since 34 is attached to the side surface of the skirt plate 26 with bolts 36, the attaching operation can be performed while being suspended by a crane (not shown). Therefore, even if the safety equipment is heavy, the attaching and detaching operation is easy. Reference numeral 37 in FIG. 4 denotes a hole through which a turning tool is inserted.

As described above, the skirt plate 26 to which the synthetic resin bumper 34 is attached can be used even when the upper revolving body turns and collides with an obstacle.
34 absorbs the impact and prevents the skirt plate 26 from being damaged or deformed. Moreover, this synthetic resin bumper
If the 34 is damaged, it can be easily removed and re-installed, making it easy to repair.Even if it is severely damaged and needs to be replaced, it is compatible and easy to replace with a new one It is. Also, skirt plate 26
This skirt plate is formed by a flat plate
If 26 is damaged, repairs can be made more easily.

FIG. 5 shows an iron bumper 38 which is one of the safety devices.
Is attached to the skirt plate 26. This iron bumper 38 has an inverted U-shaped cross section, and has a skirt plate similar to the synthetic resin bumper 34 described above.
26 is formed so as to cover the lateral direction, and attached to the plate 26 with bolts 36. This iron bumper 38
As shown in FIG. 5, the turning tool is inserted from below, but a hole 38 shown in FIG. 4 may be provided if necessary.

FIG. 6 shows a catwalk as a safety device.
FIG. 6 shows a state in which 40 is attached to the skirt plate 26. This catwalk 40 forms a frame 46 perpendicular to the upper end of the steel plate 26, provides a passage 48 such as punch metal between the frames 28, and further provides a beam 44 between the steel plate 26 and the frame 46. The steel plate 42 is fixed to the skirt plate 26 with bolts 36. FIG. 7 shows an occupant protection guard (FO) instead of the catwalk 40.
G) shows a state in which 50 is attached to the skirt plate 26.

FIG. 8 shows a state in which a stay 54 made of L-shaped steel to which a light 52 as one of safety devices is fixed is attached to the cross beam 24 '. FIG. 9 shows a state in which a step 56, which is one of safety devices, is attached to the cross beam 24 '. As described above, by unifying the screw specifications, pitches, and the like of the bolt holes, it is possible to arbitrarily attach and detach various types of safety equipment to the swing frame 22 according to the working environment.

[0023]

As described above, since the swing frame of the construction machine of the present invention is configured, it is easy to mount and remove the bumper for protecting the swing frame.
Therefore, damage accidents due to the collision of the swing frame can be prevented, and the bumper can be easily repaired or replaced. Further, various safety devices for improving workability and safety can be attached to the swing frame as needed. Therefore, workability and safety according to the work environment can be easily improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a swing frame according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a cross-sectional view showing a state where a synthetic resin bumper is attached to the swing frame of FIG. 1;

FIG. 5 is a cross-sectional view showing a state where an iron bumper is similarly attached.

FIG. 6 is a cross-sectional view showing a state where a catwalk is similarly attached.

FIG. 7 is a cross-sectional view showing a state where the occupant protection frame is similarly attached.

FIG. 8 is a cross-sectional view showing a state where a light is similarly attached.

FIG. 9 is a cross-sectional view showing a state in which steps are similarly attached.

FIG. 10 is a side view showing the appearance of a conventional hydraulic shovel.

FIG. 11 is a perspective view of a swing frame used in FIG. 10;

12 is a sectional view taken along line CC of FIG. 11;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Hydraulic excavator (construction machine) 2 Traveling device 4 Swing frame 6 Upper revolving structure 12 Front 14 Cab 20 Main frame 22 Side frame 24 Cross beam 24 'Cross beam (outer frame) 26 Skirt plate (outer frame) 28 Bolt hole 34 Resin Bumper (safety equipment) 36 Bolt 38 Iron bumper (safety equipment) 40 Catwalk (safety equipment) 50 Occupant protection frame (safety equipment) 52 Light (safety equipment) 56 steps (safety equipment)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Onishi, etc. 1-3-2 Kitaaoyama, Minato-ku, Tokyo New Caterpillar Mitsubishi Co., Ltd. (72) Inventor Izusa Idori 1-2-3 Kitaaoyama, Minato-ku, Tokyo New Caterpillar Mitsubishi Co., Ltd. (72) Inventor Akitoshi Nishikawa 1-3-2 Kita-Aoyama, Minato-ku, Tokyo New Caterpillar Mitsubishi Co., Ltd. (56) References Fully open 1984-19669 (JP, U) Fully open Showa 64-53258 (JP, U) Actually open Showa 3-12961 (JP, U)

Claims (3)

(57) [Scope of request for utility model registration] 1. A swing frame of a construction machine which is mounted on a traveling device so as to be able to swing via a swing bearing, wherein at least both side surfaces of an outer peripheral portion of the swing frame are formed of a metal plate. A swing frame for a construction machine, wherein a bolt hole having a predetermined pitch and arrangement is provided, and a safety device is mounted using the bolt hole. 2. The swing frame of a construction machine according to claim 1, wherein the safety device is a shock absorber that absorbs an impact when the swing frame turns and collides with an obstacle. 3. The swing frame of a construction machine according to claim 1, wherein the safety device is a device for ensuring work safety such as a lighting device, an occupant protection frame, and a catwalk.