JP2538023Y2 - Soundproof shroud for rough terrain cranes - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a soundproof shroud. It is about shrouds.

[0002]

2. Description of the Related Art In recent years, environmental noise regulations for working machines that perform various types of construction work in residential areas have become increasingly strict. For example, in rough terrain cranes (hereinafter called cranes), sound absorbing materials have been conventionally attached to the inside of the hood to provide some soundproofing measures. Increasingly, hoods are fitted with soundproof shrouds as described below.

FIG. 3 is an explanatory view of a mounting state on a hood,
As shown in FIG. 4 which is a perspective view of the shroud, an extremely general soundproof shroud S has a Γ shape when the hood B at the rear of the traveling body (not shown) of the crane is viewed from the side. And an air inlet I that opens in front of the crane on the upper surface of the bonnet B, and from the air inlet I toward the radiator R provided inside the bonnet B at the joint with the rear of the bonnet B. An air outlet O for discharging the sucked air is provided.

Although not shown, a well-known sound absorbing material is attached to the inner peripheral wall of the soundproof shroud S, and the soundproof shroud S is fixed to the bonnet B by mechanical means such as bolts. It is configured to be.

[0005] Therefore, the sucked air flow is the radiator R
The noise and the like generated when passing between the fins are sound-insulated and absorbed by the soundproof shroud S, so that the surrounding noise is reduced as compared with the crane without the soundproof shroud S.

[0006]

However, since the soundproof shroud having the above-mentioned structure is of a fixed type, the crane must travel with the shroud mounted, so that the following problems to be solved arise. That is, when the crane travels, the engine often rotates at full speed, so that the heat balance of the engine must be considered.

Since it is not necessary to rotate the engine at such a high speed during crane work, there is sufficient room for the heat balance of the engine. Therefore, if the soundproof performance of the soundproof shroud is set in accordance with the work, the noise can be considerably reduced. Can be expected, but taking into account when driving,
Since the sound-absorbing material has heat insulation performance, there is a limit to noise reduction during work, and it is difficult to cope with further noise reduction.

Of course, if a large-capacity radiator is mounted,
Although the soundproofing performance of the soundproof shroud can be improved, it is not preferable due to the manufacturing cost of the crane, and it is unexpectedly troublesome to make the soundproof shroud detachable. There is doubt whether it will be attached or detached.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a soundproof shroud for a crane which can be easily moved from a predetermined position when the crane travels and has a better soundproof performance.

[0010]

SUMMARY OF THE INVENTION The present invention focuses on the fact that the soundproof shroud can be utilized during work if the bellows type is used, and that the soundproof shroud can be easily moved from the mounting part and stored when the crane travels. Thus, the above problem has been solved.

Therefore, the configuration of the soundproof shroud for a crane according to the present invention is attached to the bonnet of the crane,
In a soundproof shroud for a crane having an air suction port and an air discharge port for discharging air sucked from the air suction port toward a radiator provided in the bonnet, the bonnet has a rear portion from a lower portion to an upper portion. A continuous guide rail is provided at each of both ends in the width direction, and both ends are slidably supported by the two guide rails at both ends by bending both ends in the same direction, and straddling the plurality of bone members. The soundproof sheet is attached.

[0012]

According to the soundproof shroud for a crane according to the present invention, a plurality of bone members are moved to the upper part of the bonnet along the guide rail, and when they are brought close to each other, they are stretched across the plurality of bone members. The worn soundproof sheet is folded between the bone members and the soundproof shroud can be held at the upper part of the hood in a reduced state, so that even when a thicker sound absorbing material is used, the crane travels. Does not adversely affect the heat balance of the engine.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a soundproof shroud for a crane according to the present invention will now be described with reference to FIG. 1a showing an attached state thereof, FIG. 1b showing a folded state thereof, and FIG. With reference to FIG. 2A and a cross-sectional view taken along the line AA of FIG.

Reference numeral B shown in FIG. 1 denotes a hood provided behind a traveling vehicle body (not shown) of the crane, and a soundproof shroud S having the structure described below is attached to the rear of the hood B. .

The structure of the soundproof shroud S will be described below. A guide rail 1 extending from the lower rear portion of the bonnet B to the upper surface portion is provided near both ends in the width direction of the bonnet B.
Are provided in parallel. The cross-sectional structure of the guide rail 1 is made of a C-type lightweight steel, as can be clearly understood from FIG.

The sliding member 2b of the bone member 2 having both ends bent in the same direction and flange-shaped sliding members 2b fixed to the ends of the bent portions 2a at both ends is used as a guide rail. 1, the plurality of bone members 2 are slidably provided inside the guide rail 1.
Are supported so that they can reciprocate in the longitudinal direction.

The sliding surface of the sliding member 2b may be coated with, for example, a tetrafluoroethylene resin or the like, or provided with a resin plate or the like to reduce the sliding resistance of the sliding member 2b. preferable.

Then, straddling the plurality of bone members 2,
The soundproof sheet 3 is adhered to the inner side. That is, the soundproof sheet 3 has a plurality of annularly sewn attachment rings 3c sewn on its surface. Therefore, the soundproof sheet 3 is formed by loosely inserting the respective bone members 2 into these attachment rings 3c. Will be supported.

The cross-sectional structure of the above soundproof sheet 3 includes a sound insulation sheet 3a described later on the side of the bone member 2 and a sound absorption sheet 3b made of a well-known sound absorbing material sewn together with the sheet. The sound insulating sheet 3a is formed in a three-layer structure in which a lead fiber nonwoven fabric is interposed between two vinyl sheets, and is foldable.

Therefore, when the soundproof shroud S having the above structure is mounted on the bonnet B, the portion of the upper surface of the bonnet B which opens forward is the air inlet I, and the guide rail 1 at the rear of the bonnet B is provided.
The space between the guide rail 1 and the guide rail 1 is an air outlet.

When running the crane, the sliding member 2b is slid to move the bone member 2 to the guide rail 1
The soundproof shroud S is fixed to the upper surface of the bonnet B by moving the bone members 2 closer to each other and reducing the soundproof sheet 3 while folding the soundproof sheet 3 along the upper surface of the bonnet B.

The soundproof shroud S is fixed near both ends of the bone member 2 on the side of the air inlet I of the soundproof shroud S and near both ends of the bone member 2 on the side opposite to the air inlet I, respectively. The locking device 4 presses both inner side surfaces of the guide rail 1 by widening the distance between the stop members (not shown) with screws, and releases the pressure by narrowing the distance between the stop members. It becomes something.

As described above, when the crane is running, the soundproof shroud S can be removed from the soundproof shroud S by simply moving the soundproof shroud S to the upper surface of the bonnet B and fixing it with the lock device 4. On the other hand, it is possible to set a soundproofing function in accordance with the engine rotation at the time of work at a relatively low speed, and it is possible to further reduce environmental noise at the time of work as compared with the conventional soundproof shroud.

[0024]

As described in detail above, according to the soundproof shroud for a crane according to the present invention, a plurality of bone members are moved to the upper part of the bonnet along a guide rail attached to the bonnet, and the space between them is moved. When approached, the soundproof sheet stretched across the plurality of bone members is folded between the bone members, and it is extremely easy to hold the soundproof shroud on the upper part of the hood in a reduced state. it can.

For this reason, even if the sound absorbing performance is further improved by using a thicker sound absorbing material than in the past, there is no danger of overheating of the engine during traveling of the crane. A great effect can be expected.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a state in which a soundproof shroud is attached to a bonnet according to an embodiment of the present invention, and FIG.

2A is a partial sectional view of FIG. 1A, and FIG. 2B is a sectional view taken along line AA of FIG.

FIG. 3 is an explanatory view of a state in which a conventional soundproof shroud is mounted on a bonnet.

FIG. 4 is a perspective view of a conventional soundproof shroud.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Guide rail, 1a ... Opening of a guide rail, 2 ... Bone member, 2a ... Sliding member, 3 ... Soundproof sheet, 3a ... Sound insulating sheet, 3b ... Sound absorbing sheet, 3c ... Mounting ring, 4 ... Locking device, B
... Bonnet, I ... Air inlet, O ... Air outlet, R ...
Lajeta, S ... Soundproof shroud.

Claims (1)

(57) [Scope of request for utility model registration] 1. A rough terrain crane for a rough terrain crane which is attached to a hood of the rough terrain crane and has an air suction port and an air discharge port for discharging air sucked from the air suction port toward a radiator provided in the bonnet. In the soundproof shroud, the bonnet is provided at each of both ends in the width direction with a guide rail extending from the lower part of the rear part to the upper part, and both ends of a plurality of bone members formed by bending both ends in the same direction by both guide rails. A soundproof shroud for rough terrain cranes, wherein the soundproof sheet is slidably supported and a soundproof sheet is stretched over the plurality of bone members.