JP2007154477A - Split front guard - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique of facilitating mounting work of a front guard on a work machine, to thereby alleviate a burden on the operator. <P>SOLUTION: The front guard 1 is arranged on a front surface of a driver seat of the work machine, which is obtained by installing a net body 3 in a front surface of a mounting frame body 10. Herein an upper portion 11 of the mounting frame body 10, which is secured to a ceiling portion 2, is separated from a remaining portion 12 in an attachable manner. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a front guard disposed on a driver seat front surface of a work machine.

  A front guard for protecting the operator from gravel and stones scattered during work is provided on the front surface of the driver's seat of the work machine. Many of the front guards are composed of a frame that constitutes a mounting frame and a net body (some of which has a frame in itself) attached to the frame (for example, Patent Document 1). Such a front guard is a component as a so-called attachment option, and is a constituent member attached later according to a user's request. There are various forms of the front guard, but in the case of a working machine in which the roof of the driver's seat ceiling plate projects forward, there is a configuration in which the upper part of the frame is fixed to the projection of the ceiling plate.

For example, such a configuration is arranged on the front surface of the canopy, and a conventional example thereof is shown in FIG. The front guard having such a configuration is attached as follows. First, the frame 50 and the net body 51 are assembled before attachment. In this case, if the net body 51 is assembled after the frame 50 is attached to the front surface, the crane lifting work becomes two steps, and the work becomes complicated and the time is extended. Therefore, the sub-assembly is suspended by a crane, moved to the front surface of the driver's seat, bolted with the upper end of the frame 50 in contact with the overhang of the ceiling plate 2, and the lower end of the frame 50 is bolted to the member of the floor 4 Tighten and attach.
JP 2003-328396 A (FIGS. 1 and 2)

  In the mounting step, when the sub assembly is suspended by a crane and the upper end of the frame 50 is brought into contact with the mounting portion of the ceiling plate 2, the flange 20 of the ceiling plate 2 is slightly inclined downward. The sub assembly cannot be moved close to the front because it gets in the way, and it has been necessary to lower it once and lift it up after avoiding the heel 20. In addition, when lowering the sub assembly, the boom mounting bracket 6 of the front structure is arranged in the lower front part of the front of the driver's seat of the work machine, so it is necessary to do so while avoiding the bracket. The work was complicated.

  Furthermore, along with the movements of these cranes, the detailed movements of the suspended sub-assembly (changing the angle, aligning, etc.) are carried out by pushing and pulling by hand. However, since the sub-assembly is a heavy structure, it cannot be performed by a single operator.

  The present invention has been devised in view of the above-described problems of the prior art, and aims to provide a technique that facilitates the mounting work of the front guard and can reduce the burden on the operator.

  For this reason, the split type front guard according to the present invention is a front guard disposed on the front surface of the driver's seat of the work machine, and the front guard in which the net body is assembled to the front surface of the mounting frame body. The upper side fixed to the ceiling part of the body is divided so as to be attachable to the remaining part.

  In attaching the front guard according to the present invention, first, the upper side of the attachment frame is attached to the ceiling. Next, the sub assembly in which the net is assembled to the remaining mounting frame is lifted by a crane and moved to the front surface of the driver's seat. At this time, the attachment of the sub-assembly to the front surface is the work of attaching the remaining frame to the upper frame, so that the sub-assembly can be moved horizontally without raising and lowering the sub-assembly. it can. Therefore, the operator only needs to push and pull the frame body of the sub-assembly that has been reduced in weight by dividing the upper side, align the frame bodies, and bring them into contact with each other to fix them. . These operations can be performed by one operator other than the operator who operates the crane.

  According to the present invention, when the front guard is attached, the up-and-down avoiding operation is performed by the crane while being concerned about the interference (such as the ceiling plate ridge 20 and the boom support bracket of the front structure) as in the prior art. Since there is no longer any manual work associated with it, the work can be done very easily.

  Specific embodiments of the invention according to the present application will be described with reference to the drawings. FIG. 1 shows a state in which the front guard of this embodiment is attached, where (a) is a side view and (b) is a back view (viewed from the driver's seat side). FIG. 2 is an upper divided portion which is the upper side of the frame body, and FIG. 3 is an explanatory view of the sub-assembly body.

  The front guard 1 of the present embodiment is an embodiment applied to a hydraulic excavator provided with a canopy-type driver's seat. The tip of the mounting frame body 10 is brought into contact with and fixed to the stepped portion. Although not shown, a boom support bracket (corresponding to 6 in FIG. 4) of the front structure is disposed in the lower front part of the driver's seat.

  The front guard 1 of the present embodiment includes a mounting frame body 10 fixed to the stepped portion and the floor 4 of the canopy ceiling plate 2, and a net body 3 assembled to the frame body 10. 3 includes a frame 30 having large windows on the upper and lower sides, and a metal net 31 attached to the frame 30.

  The feature of the front guard 1 of the present embodiment is that the frame body 10 is divided. That is, it is divided into an upper divided portion 11 shown in FIG. 2 and a remaining portion 12 shown in FIG. 3 (however, the illustration shows a state in which the net body 3 is assembled). It has a rectangular shape corresponding to the periphery.

  As shown in FIG. 2, the upper divided portion 11 is obtained by dividing the pipe 13 that forms both side portions of the frame body 10, which is a complete body, on the upper side. The pipes 13 on both sides are connected by an upper plate 14 to which the upper ends are fixed. The upper plate 14 is bent so as to engage with the step portion of the ceiling plate 2. Bolt holes 14b are formed in the engagement end surface 14a. A steel bar 15 fitted to the upper end of the pipe 13 on the remaining portion 12 side is fixed to the lower ends of both pipes 13. The steel bar 15 is provided with three bolt holes 15a in the vertical direction.

  As shown in FIG. 3, the remaining portion 12 is a remaining portion of the frame body 10 which is a completed body, which is divided from the upper divided portion 11. The pipes 13 on both sides are composed of a lower plate 17 and an intermediate plate 18 (both of which are shown in FIG. 1B) connecting the pipes 13. The upper ends of both pipes 13 are partly cut off so that the steel bar 15 can be freely fitted, and a bolt hole 13a corresponding to the bolt hole 15a of the steel bar 15 is formed in the fitting part. . The mesh body 3 is assembled to the front surface of the remaining portion 12 by bolting, and this becomes a sub-assembled body shown in FIG. In the figure, a handle 7 is fixed to the left pipe.

  Next, the operation for attaching the front guard 1 to the driver's seat will be described. First, the operator manually engages the engagement end surface 14a of the upper plate 14 of the upper divided portion 11 with the stepped portion at the front end of the ceiling plate 2 and tightens the bolt (location of the bolt hole 14b). Next, the sub assembly in which the net body 3 is assembled to the remaining portion 12 in advance is lifted by a crane and moved to the front surface of the driver's seat. The remaining portion 12 may be moved to the front of the driver's seat and moved horizontally from there. After approaching the front surface to some extent, the operator pushes and pulls the remaining portion 12, and moves the remaining portion 12 to the front surface while fitting the end notch of the side pipe 13 of the remaining portion 12 to the steel bar 15 of the upper divided portion 11. . After the lower plate 17 of the remaining portion 12 is brought into contact with the floor 4 and the position is fixed, the fitted steel bar 15 and the pipe 13 are bolted (where the bolt holes 13a and 15a overlap). As described above, according to the present embodiment, one worker other than the operator who operates the crane can be performed by one person.

  Of course, the present invention is not limited to the above-described embodiments, and means, methods, forms, etc. for fixing each member are changed, and the shape, size, material, etc. of each component member are changed. Even if the configuration of the work machine to be changed or applied is different, as long as the configuration of the present invention is satisfied, they are examples of the present invention.

  The present invention is a technique that can be used in a driver's seat of a work machine.

The state where the front guard of this embodiment is attached is shown, (a) is a side view, (b) is a back view (view from the driver's seat). It is explanatory drawing of the upper part division | segmentation part of the frame body of this example, (a) is a side view, (b) is a front view. It is explanatory drawing of the remainder of the frame body of this embodiment, (a) is a front view, (b) is a side view. The conventional front guard is shown, (a) is a side view, (b) is a front view.

Explanation of symbols

1 Front guard
2 Ceiling board
3 mesh
4 floors
10 Mounting frame
11 Upper division
12 balance

Claims (1)

  A front guard disposed on a front surface of a driver's seat of a work machine, wherein a net body is assembled to a front surface of a mounting frame body. Divided front guard, which is separated from the rest for easy mounting.

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