JP2542527Y2 - Work machine soundproof duct structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof duct structure for suppressing external leakage of engine sound in working machines such as cranes and hydraulic excavators.

[0002]

2. Description of the Related Art In a working machine such as a crane, it is necessary to release exhaust heat from a radiator to the outside while suppressing external leakage of engine noise.

Therefore, conventionally, a part of a side wall (engine hood) of an engine room has a porous wall structure made of a punching metal or the like.

[0004]

However, in such a conventional structure, if the total area of the holes is increased, the soundproofing performance is reduced, and if the total area is reduced, the heat dissipation is deteriorated.

Accordingly, the present invention is to provide a soundproof duct structure of a working machine capable of improving both heat dissipation and soundproofing performance.

[0006]

According to the present invention, an opening is provided in a side wall of an engine room, and a soundproof duct is provided in the opening. Each of the soundproof ducts has a soundproof layer provided on an inner surface thereof. The soundproof duct is formed by opening both sides of the side plate and the front plate so that the left and right sides are rotatable around the vertical axis and the front plate is rotatable at the lower end around the horizontal axis. A connecting means configured to be displaceable between a folded state covering the airbag and an expanded state forming an air passage opening upward in front of the opening, and connecting the both side plates and the front panel in the expanded state of the soundproof duct; and And a folding and holding means for holding the soundproof duct in the expanded state, and a folding and holding means for holding the duct in the folded state.

[0007]

According to the above configuration, the soundproof duct can improve the soundproof performance while ensuring a sufficient heat-dissipating action.

In addition, because of the folding and unfolding structure, the soundproof duct is folded when transporting the machine (for transporting a trailer in the case of a crawler type, and for traveling on a general road in the case of a wheel type), thereby reducing the size of the machine. The full width can be kept within regulations.

[0009]

FIG. 6 shows a crawler crane employing the soundproof duct structure of this embodiment.

Reference numeral 1 denotes a lower traveling body (crawler) of the crane main body, and 2 denotes an upper revolving superstructure. An engine room 3 in which an engine E (shown in FIGS. 2 and 4) is accommodated is provided at the rear of the upper revolving superstructure 2. Have been. B is a boom.

The soundproof duct structure of the engine room 3 is shown in FIG.
This will be described with reference to FIG.

An opening 4 is provided in one side wall (the right side wall when viewed from the front of the crane) forming the engine room 3.
A soundproof duct 5 is provided in the opening 4. In addition,
The opening 4 is formed in a recessed shape by bending its peripheral portion inward.

The soundproof duct 5 is composed of a pair of side plates 6 and 6 located on the left and right as viewed from the side of the crane, and a front plate 7 located on the front. Glass wool is provided on the inner surfaces of both side plates 6 and 6 and the front plate 7. A soundproof material 8 (soundproof layer) is provided.

Each of the side plates 6, 6 is pivotally mounted on one side at an opening edge by a hinge member 9 (shown in FIGS. 2 and 5) so as to be rotatable about a longitudinal axis, so that a double door type is provided. In other words, it can be moved between a position protruding substantially in front of the opening 4 at a right angle as shown in FIG. 3 and a position fitting into the opening 4 as shown in FIGS. It has become.

On the other hand, the front plate 7 has its lower end pivotally attached to the edge of the opening by a hinge member 10 so as to be rotatable around a horizontal axis. It is possible to move between a position that fits inside the opening 4 in an upright posture overlapping the outside of 6,6.

In this manner, the soundproof duct 5 is unfolded as shown in FIGS. 1 to 3 and FIG. 6 so as to protrude in front of the opening 4, and as shown in FIGS. It is configured to be displaceable between a folded state.

Therefore, during operation of the crane, the duct 5 is expanded to form an air passage S which opens upward in front of the opening 4, and as shown by arrows in FIG. The engine noise can be absorbed by the soundproofing material 8 while being emitted to the outside via the passage S.

When the crane is transported, the soundproof duct 5 is folded so that the projecting dimension of the duct 5 can be reduced to zero and the overall width of the machine can be kept within legal regulations.

The front plate 7 is configured such that the upper plate 7a and the lower plate 7b are connected to each other by a hinge member (not shown) so that the front plate 7 can be bent and stretched. The front plate 7 is bent in a square shape when the duct is expanded, and is linear when the duct is folded. ing.

In this way, when the duct is unfolded, the protrusion of the duct 5 can be reduced while the air passage S is increased by the front plate 7.

A stopper 7c is formed at the lower end of the upper plate 7a so as to extend downward. This stopper 7c prevents the upper plate 7a and the lower plate 7b from being bent in the opposite direction beyond a straight line when the duct is folded. Angle is regulated. Further, the gap between the upper plate 7a and the lower plate 7b is hidden by the stopper 7c.

Flanges 7d are formed on the front plate 7 at both left and right ends of an upper plate 7a and a lower plate 7b.
The flange 7d of the upper plate is connected to the front ends of both side plates 6 and 6 with the thumb screw 11 in the duct expanded state.

On the other hand, a pair of right and left bending / extending links 12, 12 is provided between the inner surface of the center portion of the upper plate 7a of the front plate 7 and the upper edge of the opening 4. 7, that is, the soundproof duct 5 is maintained in the deployed state.

In addition, one coil spring 13 is provided between the opening edge portion and the bending fulcrum portion of the link 12, 12 inside the link 12, and a pair is provided between the opening edge portion and the front plate 7 outside. Coil springs 14, 14
Are provided so that the weight of the soundproof duct 5 is supported, so that the duct 5 can be easily folded and unfolded with a small force.

As shown in FIGS. 1 and 3, the left and right ends of the upper plate 7a are manually slid left and right.
5 and 15 are provided.
The duct 5 can be held in a folded state by inserting the ducts 5 and 15 into latch holes (not shown) provided on both right and left edges of the opening 4.

Other Embodiments (a) The means for connecting the side plates 6, 6 and the front plate 7 in the unfolded state of the soundproof duct 5 is not limited to the thumb screw 11 of the above-described embodiment. Various means can be selected, such as a means to be used and a means for locking a latch provided on one side to a hanging shaft provided on the other side.

(B) As means for holding the duct 5 in a folded state, an automatic latch structure used for closing and holding a door, instead of the manual latch structure of the above embodiment,
Screwing means or the like can be used.

[0028]

As described above, according to the present invention, an opening is provided in the side wall of the engine room, and a soundproof duct having a soundproof layer is provided in the opening. The soundproofing performance can be improved while the operation is ensured.

Moreover, since the duct is configured to be foldable and expandable, the soundproof duct is folded during transportation of the machine, so that the entire width of the machine can be kept within the legal regulations.

[Brief description of the drawings]

FIG. 1 is a front view of a soundproof duct in a deployed state according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a perspective view of the duct in a deployed and extended state.

FIG. 4 is a diagram corresponding to FIG. 2 in a folded state of the duct.

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is an overall side view of the crane including the structure of the embodiment.

[Explanation of symbols]

 Reference Signs List 3 engine room 4 opening 5 soundproof duct 6,6 pair of side plates 7 front plate 8 soundproofing material (soundproof layer) 9 hinge member for pivotally connecting both side plates 10 hinge for pivotally connecting front plate rotatably Member S Air passage of soundproof duct 11 Thumbscrew as connecting means 12 Link as deployment and holding means 15 Latch as folding and holding means

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display F02B 77/13 F02B 77/13 A

Claims (1)

(57) [Scope of request for utility model registration] An opening is provided in a side wall of an engine room, and a soundproof duct is provided in the opening. The soundproof duct includes a pair of side plates and a front plate each having a soundproof layer provided on an inner surface thereof. The left and right sides of the two side plates are pivotally attached around the vertical axis, and the front plate is pivotally attached at the lower end around the horizontal axis, so that the soundproof duct covers the opening. It is configured to be displaceable between a deployed state forming an air passage opening upward and forward,
And a connecting means for connecting the side plates and the front plate in the unfolded state of the soundproof duct, an unfolding and holding means for holding the soundproof duct in the unfolded state, and folding holding means for holding the duct in the folded state. A soundproof duct structure for a working machine, comprising: