JP2010031550A - Mud raising work machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mud raising work machine having a handrail, facilitating elevation of an operator onto a crawler. <P>SOLUTION: The crawler 3 is wrapped round each of right and left floats 2 to constitute a lower traveling body 1. An upper revolving superstructure 16 is installed on the lower traveling body 1 through a revolving apparatus 15. A working arm 21 is mounted to the upper revolving superstructure 16, and a working tool 22 is fitted to the tip of the working arm 21. The handrail 24 is fitted to a position outside of the revolving range of the upper revolving superstructure 16 on the outside surface of the float 2. The handrail 24 is installed with the upper part extended upward from the base of the upper revolving superstructure 16. The handrail 24 has a step 27 in a portion located on the side surface of the float 2. When an operator or the like elevates on the crawler 3, he can easily elevate with the handrail 24 held in his hands without largely bending his body. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a mud working machine used when excavation and ground improvement work is performed on a wet ground, and more particularly to a handrail for raising and lowering an operator attached to the float.

  A mud working machine that performs operations such as excavation and soil improvement in a wetland is configured by wrapping a crawler belt around a box-shaped float as disclosed in Patent Document 1. In such a mud work machine, the operator and maintenance staff move up and down to the cab or building on the upper swing body, so a step (stair) is attached to the side of the float by welding, and the operator holds it by hand. A handrail is attached to the side of the float by welding. In order to avoid interference with the upper swing body, the conventional hand rail has a short structure in which the upper end of the hand rail protrudes slightly upward from the crawler belt on the float and is lower than the bottom surface of the upper swing body.

JP 2003-137147 A

  As described above, the handrail of the conventional mud work machine has a short structure such that the upper end protrudes slightly upward from the crawler belt on the float. For this reason, when an operator or the like climbs a crawler belt on the float or gets off the crawler belt, the operator or the like is forced to take a posture of lowering the body, and is difficult to move up and down. There is a problem.

  In addition, since the handrail is welded to the mounting seat provided on the float, when performing maintenance, inspection and repair by inverting the float, the handrail is fused from the mounting seat to prevent damage to the handrail. There is also a problem that it is troublesome because the handrail needs to be welded again after completion of the maintenance inspection and repair.

  In view of the above problems, an object of the present invention is to provide a mud working machine having a handrail that makes it easy for an operator to move up and down on a crawler belt. It is another object of the present invention to provide a mud work machine having a handrail that is advantageous in terms of maintenance and inspection such as float and disassembly and transportability.

The mud work machine according to claim 1 is a lower traveling body in which crawler belts are respectively attached to the left and right floats;
An upper swing body installed on the lower traveling body via a swing device;
A working arm attached to the upper swing body;
In a mud working machine having a working tool attached to the tip of the working arm,
A hand rail having a step at a position located on the side surface of the float, the upper part being attached to a position outside the turning range of the upper turning body on the side surface of the float and extending upward from the bottom surface of the upper turning body It is provided with.

The mud working machine according to claim 2 is the mud working machine according to claim 1,
The handrail is detachably attached to a side surface of the float.

The mud working machine according to claim 3 is the mud working machine according to claim 1 or 2,
A mounting seat having a screw hole for bolting a handrail is fixed on a beam welded to a side surface of the float, and a rib supporting the mounting seat is attached to the beam at a lower portion of the mounting seat. And

  According to the first aspect of the present invention, the position of the handrail is set at a position that does not interfere with the upper swing body on the side surface of the float, and the tall hand rail that extends upward from the lower surface of the upper swing body is provided. When the operator or maintenance staff moves up and down on the crawler belt, it is not necessary to take a posture in which the body is greatly bent when the handrail is held by the operator or the like, so that lifting and lowering is facilitated and safety is improved. In addition, since the handrail is provided with a step, the handrail and the step can be manufactured as a single part, and the work of attaching the step to the float is not required. Becomes easy.

  According to the invention of claim 2, since the handrail is detachably attached to the side surface of the float by the bolt, maintenance and inspection of the float and the crawler track are facilitated. In other words, in the past, the float could be turned upside down, and the handrail could be easily attached / detached by attaching / detaching the bolts when performing maintenance / inspection / repair on the bottom side of the float or the crawler track on the bottom side. It becomes easy.

  In addition, in order to give the float buoyancy, the float is also large, and it is often necessary to transport the float separately from the upper revolving structure. This improves the decomposition and transportability. In addition, repair and replacement when the handrail is damaged is facilitated.

  According to the invention of claim 3, since the mounting seat of the handrail is supported by the beam on the side surface of the float via the rib, the mounting seat is prevented from being deformed by the weight of the operator and changing the direction of the handrail. be able to.

  FIG. 1 is a side view showing an embodiment of a mud working machine according to the present invention, FIG. 2 is a front view, and FIG. 3 is a plan view thereof. Reference numeral 1 denotes a lower traveling body. The lower traveling body 1 is configured by a crawler belt 3 wound around a float 2 having a hollow box shape. The lower traveling body 1 has a height of about 1.8 m, for example. As shown in FIG. 4, the crawler belt 3 includes a roller chain 6 formed by connecting a set of two links 4 by a roller shaft 5, and a square shape welded to the links 4 of the left and right roller chains 6. It consists of a hollow pipe 7. A driving sprocket 8 and a driven sprocket 9 that mesh with the roller chain 5 are provided at the rear and front of each float 2. Reference numeral 10 denotes a travel motor that is a hydraulic motor provided on the opposite surface side of the left and right floats 2, and 11 is a speed reducer that decelerates the rotation of the output shaft of the travel motor 10 and transmits it to the drive sprocket 8.

  The left and right floats 2 and 2 are connected to each other by front and rear support beams 12 and 12. These support beams 12 and 12 are attached by being penetrated to an attachment pipe provided so as to penetrate the float 2, and are prevented from coming off by a retaining pin 13. The center frame 14 is fixed on the support beams 12 and 12, and the turning device 15 is installed on the center frame 14.

  A hydraulic power unit 17, an operator cab 18, and the like are mounted on the upper swing body 16 installed on the swing device 15. The upper swing body 16 includes a boom 19 attached to the upper swing body 16 by a boom cylinder 19a so as to be raised and lowered, and an arm 20 attached to the tip of the boom 19 so as to be rotatable by an arm cylinder 20a. 21 is installed. A bucket 22 is attached to the tip of the working arm 21 so as to be rotatable by a bucket cylinder 22a. Other multi-joint arms or telescopic arms with different numbers of joints may be used as the working arm 21, and other things such as an improved material injection stirrer may be used instead of the bucket 22 as the working tool. .

  A handrail 24 is attached to the outer surface of the float 2. As shown in FIG. 3, the handrail 24 is attached to a location located outside the turning range 25 of the upper turning body 16. As shown in FIGS. 1 and 2, the upper portion of the handrail 24 extends higher than the bottom surface 16 a of the upper swing body 16.

  5A and 5B are a side view and a front view of the handrail 24, respectively. The handrail 24 includes left and right struts 26, 26 made by bending a pipe, and a step (step) 27 welded between the struts 26, 26. The upper portion of the support column 26 is bent in an inverted U shape, and a reinforcing member 26b for preventing the expansion is welded to the bent portion 26a. A plate-like upper mounting portion 28 is welded to the lower end of the bent portion 26a on the float 2 side. A plate-like lower mounting portion 29 is also welded to the lower end portion of the column 26.

  A beam 30 that supports the sprockets 8 and 9 and reinforces the float 2 is welded to the side surface of the float 2. An upper mounting seat 31 (which may be bolted) is fixed on the beam 30 by welding, and the upper mounting portion 28 is detachably mounted on the upper mounting seat 31 with a bolt 32. Further, the lower mounting seat 33 is fixed to the lower portion of the side surface of the float 2 by welding (or may be bolted), and the lower mounting portion 29 is detachably attached to the lower mounting seat 33 by the bolt 34. In a state where the handrail 24 is attached to the float 2, the step 27 is located on the side surface of the float 2.

  FIGS. 6A and 6B are a side view and a front view, respectively, showing a mounting structure of the upper mounting portion 28 of the handrail 25 to the float 2. As shown in FIG. 6A, the upper mounting seat 31 is mounted on the U-shaped beam 30 so that a part thereof protrudes outward from the outer edge of the beam 30. A vertical plate-like rib 35 is welded to the lower surface of the protruding portion from the beam 30 of the upper mounting seat 31. The rib 35 is fitted and brought into contact with the beam 30, and the upper mounting seat 31 is supported on the beam 30 by the rib 35. This rib 35 may be welded to the beam 30.

  The upper mounting seat 31 has a screw hole 36, the upper mounting portion 27 of the handrail 24 is overlapped with the upper mounting seat 31, a bolt 32 is inserted into a bolt insertion hole 37 provided in the upper mounting portion 27, and the upper mounting seat 31. The upper mounting portion 28 is detachably fixed to the upper mounting seat 31 by being screwed into the screw hole 36.

  7A and 7B show an example in which the beam 30A has a hollow prismatic shape. In this case, the rib 35 is brought into contact with the outer surface of the beam 30A (it may be welded). Is supported by the upper mounting seat 31.

  In this mud work machine, the position of the handrail 24 is set at a position that does not interfere with the upper swing body 16 on the side surface of the float 2, and the tall handrail 24 extended upward from the bottom surface of the upper swing body 16. Thus, when the operator or maintenance staff moves up and down on the crawler belt 3, it is possible to move up and down with the body stretched, which makes it easy to move up and down and improves safety. In addition, since the handrail 24 is provided with the step 27, the handrail 24 and the step 27 can be manufactured as one component, and the work of attaching the step 27 to the float 2 is not required, so that the lifting device can be easily manufactured and assembled. Become.

  In the present embodiment, since the handrail 24 is detachably attached to the side surface of the float 2 with the bolts 32 and 34, when the float 2 is reversed and the float 2 and the crawler belt 3 are inspected and repaired, The handrail 24 can be easily removed by removing the bolts 32 and 34. For this reason, the maintenance inspection and repair of the float 2 and the crawler belt 3 are facilitated.

  Further, when the float 2 is transported separately from the upper revolving structure 16 together with the crawler belt 3, the handrail 24 can be removed and transported, and the disassembly and transportability is improved. Further, repair and replacement when the handrail 24 is damaged are facilitated.

  Further, since the mounting seat 31 of the handrail 24 is supported by the beams 30 and 30A on the side surface of the float 2 via the ribs 35, the mounting seat 31 is deformed by the weight of the operator or the like and the orientation of the handrail 24 changes. This can be prevented.

It is a side view showing one embodiment of a mud working machine of the present invention. It is a front view which abbreviate | omits and shows the front of the mud working machine of FIG. It is a top view which abbreviate | omits the front of the mud working machine of FIG. It is a partial side view of the crawler belt of this Embodiment. (A) is the side view of the handrail of this Embodiment, (B) is the front view. (A) is the side view of the attachment part of the handrail of this Embodiment, (B) is the front view. (A) is a side view which shows the other example of the attachment part of the handrail of this invention, (B) is the front view.

Explanation of symbols

1: Lower traveling body, 2: Float, 3: Track, 4: Link, 5: Roller shaft, 6: Roller chain, 7: Pipe, 8: Drive sprocket, 9: Driven sprocket, 10: Traveling motor, 11: Deceleration Device: 12: Support beam, 13: Retaining pin, 14: Center frame, 15: Rotating device, 16: Upper rotating body, 16a: Bottom surface, 17: Hydraulic power unit, 18: Cab, 19: Boom, 19a: Boom Cylinder, 20: Arm, 20a: Arm cylinder, 21: Working arm, 22: Bucket, 22a: Bucket cylinder, 24: Hand rail, 25: Turning range, 26: Support column, 26a: Curved part, 26b: Reinforcement material 27: Step, 28: Upper mounting portion, 29: Lower mounting portion, 30, 30A: Beam, 31: Upper mounting seat, 32, 34: Bolt, 3: lower mounting seat, 35: rib, 36: screw hole 37: bolt insertion hole

Claims (3)

Undercarriage with crawler belts on left and right floats,
An upper swing body installed on the lower traveling body via a swing device;
A working arm attached to the upper swing body;
In a mud working machine having a working tool attached to the tip of the working arm,
A hand rail having a step at a position located on the side surface of the float, the upper part being attached to a position outside the turning range of the upper turning body on the side surface of the float and extending upward from the bottom surface of the upper turning body A mud work machine characterized by comprising In the mud work machine according to claim 1,
A mud work machine, wherein the handrail is detachably attached to a side surface of the float. In the mud work machine according to claim 1 or 2,
A mounting seat having a screw hole for bolting a handrail is fixed on a beam welded to a side surface of the float, and a rib supporting the mounting seat is attached to the beam at a lower portion of the mounting seat. Mud work machine.

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