JP2007197965A - Working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a working machine capable of easily being raised and fallen from and on the upper surface of a rotating body and preventing damage to a side cover resulting from lifting and lowering. <P>SOLUTION: In a hydraulic shovel equipped with the rotating body 2 having an engine room defined by a building cover 7 between a driver's cabin 5 and a counterweight 6 and a rising and falling device provided so as to be covered by a side cover 7a forming the building cover 7 and used for climbing on the upper surface of the rotating body 2, the rising and falling device is provided at a building frame 12 holding the building cover 7 separated from the side cover 7a, and when a rise and fall from and to the upper surface of the rotating body 2 are applied, it is formed of a ladder 11 placed so as to make it possible to be opposed to the side of the rotating body 2, and when the maintenance/inspection work of equipment placed in of the building cover 7 is carried out from the side face of the rotating body 2, the ladder 11 is so constituted that it is equipped with an evacuation means, for example, a hinge 13 for evacuating a position which does not become obstructive to the work. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a working machine such as a hydraulic excavator or a crane having a swivel body, and in particular, a work machine provided with an elevating device provided so as to be covered by a side cover that forms a building cover and ascending to the upper surface of the swivel body. About.

  There exists a thing shown by patent document 1 as this type of prior art. In this Patent Document 1, an elevating device, that is, a step is provided inside a side surface cover that forms a building cover, and the side surface cover is opened at a right angle to the side surface of the revolving body when working on the upper surface of the revolving body. The worker is locked in the state, and the operator goes up to the upper surface part by stepping on the step provided inside the side surface cover. When the operation on the upper surface is not performed, the side surface cover is kept closed so as to face the side surface of the revolving structure.

The conventional technology configured as described above ensures aesthetics because the step for ascending the upper surface of the revolving unit is covered by the side surface cover when maintenance / inspection work on the upper surface of the revolving unit is not performed. Can do. Further, when maintenance / inspection work is performed on the upper surface of the revolving structure, the worker ascends to the upper surface of the revolving structure through steps provided inside the side surface cover, and performs desired maintenance / inspection work. be able to.
JP 2003-213725 A

  In the above-described prior art, when performing work on the upper surface of the revolving structure, the operator puts his feet on the step with the side cover open so as to be perpendicular to the side surface of the revolving structure. Because it is designed to rise to the upper surface of the body, it is necessary for the operator to twist his / her body when moving from the step to the upper surface of the swivel body and vice versa. There is a tendency to make it difficult to move up and down. For this reason, there exists a possibility that the workability | operativity of the operation | work in the upper surface part of a turning body may fall.

  Further, since the entire load applied by the operator is applied to the side surface cover when ascending to the upper surface portion of the revolving structure, there is a risk that the side surface cover may be damaged. In order to prevent such damage to the side surface cover, It is necessary to reinforce the part cover with a strength member. This tends to increase the production cost of the side cover.

  The present invention has been made from the above-described state of the art, and an object of the present invention is to provide a working machine that can be easily lifted and lowered with respect to the upper surface of the swivel body and that can prevent damage to the side surface cover accompanying the lifting. It is to provide.

  In order to achieve this object, the present invention provides an engine room having a cab at the front, a counterweight at the rear, and a building cover defined between the cab and the counterweight. In a working machine provided with a revolving body having a side cover that forms the building cover and provided with a lifting device for ascending to the upper surface of the revolving body, the lifting device holds the building cover. The building frame is mounted separately from the side cover, and includes a ladder that is disposed so as to face the side surface of the revolving body when the revolving body is raised and lowered relative to the upper surface portion.

  Since the present invention configured as described above includes a ladder disposed so as to be able to face the side surface of the revolving structure, the ladder is disposed so as to face the side surface of the revolving structure when raising and lowering the upper surface portion of the revolving structure, In this state, by climbing the ladder, it is possible to transfer from the ladder to the upper surface of the revolving body without twisting the body. Similarly, when descending the ladder from the upper surface of the revolving structure, it is possible to descend without twisting the body. That is, it can be easily moved up and down with respect to the upper surface portion of the revolving structure via the ladder disposed opposite to the side surface of the revolving structure. Further, since the ladder is attached to the building frame that holds the building cover separately from the side cover, the load by the operator is not applied to the side cover when the ladder is lifted or lowered. That is, it is possible to prevent the side cover from being damaged due to the raising and lowering of the upper surface of the revolving structure.

  Further, the present invention provides the above-described invention, wherein the ladder is retracted to a position that does not interfere with the work when the ladder is maintained and inspected from the side of the revolving structure. It is characterized by having.

  The present invention configured as described above can perform the work in a state in which the ladder is retracted by the retracting means at the time of maintaining / inspecting the equipment arranged inside the building cover from the side surface side of the revolving structure.

  According to the present invention, in the above invention, the retracting means comprises holding means for holding the ladder so as to be rotatable in the horizontal direction.

  The present invention configured as described above easily turns the ladder in the horizontal direction from the state of being opposed to the side surface of the revolving unit so as not to obstruct maintenance / inspection work from the side surface side of the revolving unit. The ladder can be retracted.

  Further, the present invention is characterized in that, in the above invention, a handrail is provided on the upper surface portion of the swivel body located immediately above the ladder in a state of being opposed to the side surface of the swivel body.

  The present invention configured as described above allows an operator to easily get on and off by gripping a handrail when transferring from the ladder to the upper surface of the revolving structure or when getting on the ladder from the upper surface of the revolving structure. Can do.

  Further, in the present invention, in the above invention, a traveling body is provided below the revolving body, and the traveling frame of the traveling body is positioned directly below the ladder in a state of being opposed to the side surface of the revolving body. It is characterized by having a step that allows an operator to set foot.

  According to the present invention configured as described above, when the operator moves up and down with respect to the upper surface portion of the revolving structure, he / she only needs to step on the step of the traveling frame from the ground and ascend to the ladder, and vice versa. Just step down and step down to the ground.

  In the present invention, the lifting device for ascending to the upper surface portion of the swivel body is attached to the building frame holding the building cover separately from the side cover, and on the side surface of the swivel body when raising and lowering the upper surface portion of the swivel body Because it is composed of ladders arranged so as to be able to face each other, it can be lifted and lowered easily without twisting the upper surface of the revolving structure, and the efficiency of maintenance and inspection work on the upper surface of the revolving structure is higher than before. Can be improved. In addition, the load on the side cover is not applied to the side cover in accordance with the lifting and lowering operation, and the side cover can be prevented from being damaged, so that the durability of the side cover is improved and the production cost of the side cover is reduced. Can be realized.

  Hereinafter, the best mode for carrying out a working machine according to the present invention will be described with reference to the drawings.

  FIG. 1 is a side view showing an embodiment of a working machine according to the present invention, FIG. 2 is an enlarged view showing a main part of FIG. 1, and FIG. 3 is a side cover that forms a building cover from the state shown in FIG. It is a figure which shows the state excepted.

  As shown in FIG. 1, the working machine according to the present embodiment is, for example, a medium-sized or small hydraulic excavator, and includes a traveling body 1, a revolving body 2 disposed on the traveling body 1, and the revolving body 2. And a front work machine 3 mounted so as to be rotatable in the vertical direction. The swivel body 2 is not provided with a side step on which an operator or a maintenance / inspection worker can walk.

  The swivel body 2 includes a cab 5 at the front part on the swivel frame 4 and a counter weight 6 that ensures a weight balance at the rear part. An engine room defined by a building cover 7 is provided between the cab 5 and the counterweight 6.

  The front work machine 3 includes a boom 8 attached to the revolving structure 2, an arm 9 connected to the boom 8, and a bucket 10 connected to the arm 9.

  As shown in FIGS. 2 and 3, in this embodiment, in particular, the lifting device for ascending to the upper surface of the revolving structure 2 includes a side cover 7 a that forms the building cover 7 on the building frame 12 that holds the building cover 7. Is attached to a separate body, and is configured to include a ladder 11 that is disposed so as to be opposed to the side surface of the revolving body 2 when the revolving body 2 is raised and lowered with respect to the upper surface portion. A side cover 7a is rotatably attached to another building frame 14 shown in FIG.

  Further, in the present embodiment, the ladder 11 does not interfere with the work when the equipment provided in the engine room defined in the building cover 7 is maintained and inspected from the side of the revolving structure 2. A retracting means for retracting to a position is provided. The retracting means comprises holding means for holding the ladder 11 so as to be rotatable in the horizontal direction, for example, a hinge 13 for attaching the ladder 11 to the building frame 12.

  As shown in FIGS. 2 and 3, when the ladder 11 is arranged so as to face the side surface of the revolving structure 2, the step 1 c provided on the traveling frame 1 a described above is positioned directly below the ladder 11. Step 1c is arranged.

  Further, a handrail 15 is provided on the upper surface portion of the revolving structure 2 located immediately above the ladder 11 in a state of being opposed to the side surface of the revolving structure 2.

  4-6 is a figure which shows the state at the time of the operation | work of the ladder part which forms the principal part of this embodiment, The figure (a) of FIG. 4 rides on the upper surface part of a turning body, and is arrange | positioned inside a building cover. FIG. 4B is a diagram showing a state at the time of work for maintaining / inspecting a device arranged inside the building cover from the side surface side. 5A is a view seen from the A1 direction of FIG. 4A, FIG. 5B is a view seen from the B1 direction of FIG. 4, and FIG. 6A is a view. 5 (a) is a view seen from the direction A2, and FIG. 6 (b) is a view seen from the direction B2 in FIG.

  In the present embodiment configured as described above, when the building cover 7 on the upper surface portion of the revolving structure 2 is opened to perform maintenance / inspection of the equipment in the engine compartment, FIG. As shown, the side cover 7 a is opened, and the side cover 7 a is locked and held on the revolving frame 4 by the stopper 16. Further, as shown in FIG. 4A and FIG. 5A, the ladder 11 is disposed so as to face the side surface of the swivel body 2. In this state, it is possible to step on the step 1c provided on the traveling frame 1a shown in FIG. 1 and ascend to the ladder 11, and further to grasp the handrail 15 and ascend to the upper surface of the revolving unit 2. The worker who has risen to the upper surface portion can open the building cover 7 on the upper surface portion as described above and perform desired maintenance / inspection work.

  Further, when performing maintenance / inspection of equipment in the engine compartment from the side surface side of the revolving structure 2, the side cover 7a is opened as shown in FIG. ) As shown in FIG. 5 and FIG. 5B, the ladder 11 is rotated in the horizontal direction, and the ladder 11 is retracted. In this state, for example, a desired maintenance / inspection operation can be performed by stepping on step 1c of the traveling frame 1a.

  At the time of excavation work where the above-described maintenance / inspection work is not performed, the side cover 7a is kept closed as shown in FIG. Thereby, the ladder 11 is covered with the side cover 7a, and the appearance can be ensured.

  According to the present embodiment, since the ladder 11 is disposed so as to be able to face the side surface of the revolving structure 2, the ladder 11 is arranged so as to face the side surface of the revolving structure 2 when raising and lowering the upper surface portion of the revolving structure 2. By placing and climbing the ladder 11 in this state, it is possible to transfer from the ladder 11 to the upper surface of the revolving structure 2 without twisting the body. Similarly, when descending on the ladder 11 from the upper surface of the revolving structure 2, it is possible to descend without twisting the body. That is, it is possible to easily move up and down with respect to the upper surface portion of the revolving body 2 via the ladder 11 disposed opposite to the side surface of the revolving body 2, and the efficiency of maintenance and inspection work on the upper surface portion of the revolving body 2 can be improved.

  Further, since the ladder 11 is attached to the building frame 12 holding the building cover 7 separately from the side cover 7a, a load applied by the operator is applied to the side cover 7a when moving up and down through the ladder 11. There is nothing. That is, it is possible to prevent the side cover 7a from being damaged due to raising and lowering of the upper surface portion of the revolving unit 2, and it is possible to improve the durability of the side cover 7a and reduce the manufacturing cost of the side cover 7a.

  Further, since the retracting means for retracting the ladder 11, that is, the hinge 13, is provided, the ladder 11 can be retracted to a position that does not interfere with the work when performing maintenance and inspection from the side of the revolving structure 2. . That is, the ladder 11 can be easily retracted by rotating the ladder 11 in the horizontal direction from the state of being opposed to the side surface of the revolving structure 2 via the hinge 13. Thereby, the efficiency of the maintenance / inspection work from the side of the revolving unit 2 can be improved.

  Moreover, since the handrail 15 is provided in the upper surface part of the revolving structure 2 located directly on the ladder 11 in a state of being opposed to the side surface of the revolving structure 2, when transferring from the ladder 11 to the upper surface part of the revolving structure 2 In addition, when the operator descends the ladder 11 from the upper surface portion of the revolving structure 2, the operator can easily get on and off by holding the handrail 15, thereby ensuring excellent safety.

  Further, since the traveling frame 1a is provided with step 1c, when the operator ascends and descends with respect to the upper surface portion of the revolving structure 2, if the operator steps on the step 1c of the traveling frame 1a from the ground and rises to the ladder 11 On the contrary, it is only necessary to descend from the ladder 11 to the step 1c of the traveling frame 1a, and further descend from the step 1c to the ground.

  In the embodiment described above, the retracting means is configured by the hinge 13, but the present invention is not limited to configuring the retracting means in this way. For example, the retracting means may be configured by means for sliding the ladder 11 in the horizontal direction.

1 is a side view showing an embodiment of a work machine according to the present invention. It is a figure which expands and shows the principal part of FIG. It is a figure which shows the state which remove | excluded the side cover which forms a building cover from the state shown in FIG. It is a figure which shows the state at the time of the operation | work of the ladder part which forms the principal part of this embodiment, (a) A figure is the time of the operation | work which carries out the maintenance and inspection of the equipment arrange | positioned on the upper surface part of a revolving structure inside a building cover. (B) is a figure which shows the state at the time of the operation | work which maintains and inspects the apparatus arrange | positioned inside a building cover from the side surface side of a turning body. It is a figure which shows the state at the time of the operation | work of the ladder part which forms the principal part of this embodiment, (a) A figure seen from the A1 direction of the (a) figure of FIG. 4, (b) A figure is B1 of FIG. It is the figure seen from the direction. It is a figure which shows the state at the time of the operation | work of the ladder part which forms the principal part of this embodiment, (a) A figure seen from the A2 direction of the (a) figure of FIG. 5, (b) A figure is B2 of FIG. It is the figure seen from the direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling body 1a Traveling frame 1c Step 2 Revolving body 5 Driver's cab 6 Counterweight 7 Building cover 7a Side cover 11 Ladder (lifting device)
12 Building frame 13 Hinge (holding means) [Retracting means]
15 Handrail 16 Stopper

Claims (5)

A swivel body having a cab at the front, a counterweight at the rear, an engine room defined by a building cover between the cab and the counterweight, and a side surface forming the building cover In a work machine provided with a cover so as to be covered, and provided with an elevating device for ascending to the upper surface of the swivel body,
The lifting device is
The building frame that holds the building cover is attached to a separate body from the side cover, and includes a ladder that is disposed so as to face the side surface of the revolving body when the revolving body is raised and lowered relative to the upper surface portion. Work machine. In the invention of claim 1,
An operation characterized by comprising a retracting means for retracting the ladder to a position that does not interfere with the work when maintaining and inspecting the equipment deployed inside the building cover from the side of the revolving structure. machine. In the invention of claim 2,
A working machine characterized in that the retracting means comprises holding means for holding the ladder so as to be rotatable in a horizontal direction. In the invention of claim 1,
A work machine, wherein a handrail is provided on the upper surface portion of the revolving structure that is positioned immediately above the ladder in a state of being opposed to the side surface of the revolving structure. In the invention according to any one of claims 1 to 4,
While having a traveling body below the revolving structure,
A working machine comprising a step on which a worker can put a foot on a traveling frame of the traveling body so as to be positioned immediately below a ladder in a state of being opposed to the side surface of the revolving body.

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