JPH10305736A - Engine exhaust structure for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate necessity for the heat insulating material of asbestos or the like even in a narrow construction site, so that smooth construction can be performed without moving a construction machine, by forming an exhaust structure which can freely change an exhaust direction of an engine mounted in the construction machine. SOLUTION: In this engine exhaust structure for a construction machine, in the construction machine mounting an engine on a lower part running unit in an upper part turn unit, mounting it turnably, to be capable of releasing engine exhaust through a muffler 1 from a side or rear part of the upper part turn unit to the atmosphere, a tail member or elbow-shaped tail pipe is provided, which arranges in parallel an almost V-shaped wind shield plate 3 or a plurality of louvers in an outlet of an exhaust pipe 2 connected to the muffler 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust structure of an engine mounted on a construction machine, and more particularly to an exhaust pipe whose exhaust direction can be freely changed.

[0002]

2. Description of the Related Art Conventionally, in construction work in a narrow place such as an urban construction work, the exhaust gas of a high-temperature engine is directly discharged from the muffler to the atmosphere via an exhaust pipe, so that a combustible material is located nearby. If there is a fire, there is a danger of fire.To prevent this, it is necessary to interpose insulating material such as asbestos, or to change the direction of construction machinery.In the former case, it is necessary for the actual work of asbestos. It is necessary to prepare something that does not exist, while in the case of the latter, it is sufficient to have a space where the direction of the construction machine can be changed, but in a narrow construction site there is no space, so even if there is space, change the direction each time It is difficult because the work efficiency is reduced.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and has as its object to eliminate the need for heat insulating material such as asbestos even in a narrow construction site and to smoothly move construction machines without moving the same. The purpose is to make possible the construction.

[0004]

In order to achieve the above object, the present invention has the following arrangement. That is, in the engine exhaust structure of the construction machine according to the first aspect, the upper revolving structure on which the engine is mounted is mounted on the lower traveling body so as to be capable of revolving, and the engine exhaust is passed through the muffler to the side of the upper revolving structure or In a construction machine capable of being released into the atmosphere from the rear, a substantially V-shaped windbreak plate is provided at an outlet of an exhaust pipe connected to a muffler.

[0005] Further, the invention according to claim 2 is based on claim 1.
In the engine exhaust structure described in (1), the windbreak plate is mounted rotatably in the circumferential direction of the exhaust pipe, and the V-shaped angle of the windbreak plate is adjustable by adjusting means.

According to a third aspect of the present invention, there is provided an engine exhaust structure for a construction machine in which an upper revolving structure on which an engine is mounted is mounted on a lower traveling structure so as to be revolvable, and the engine exhaust is provided on a side of the upper revolving structure via a muffler. In a construction machine capable of being discharged into the atmosphere from a part or a rear part, a tail member in which a plurality of louvers are arranged in parallel is provided at an outlet of an exhaust pipe connected to a muffler.

[0007] The invention described in claim 4 is the invention according to claim 3.
Wherein the plurality of louvers are each adjustable by louver angle adjusting means.

Further, according to a fifth aspect of the present invention, in the engine exhaust structure according to the third or fourth aspect, a tail member in which the plurality of louvers are arranged in parallel is rotated in a circumferential direction of an exhaust pipe. It is characterized by being mounted as possible.

According to a sixth aspect of the present invention, there is provided an engine exhaust structure for a construction machine, wherein an upper revolving structure on which an engine is mounted is rotatably mounted on a lower traveling structure, and the engine exhaust is provided on a side of the upper revolving structure via a muffler. In a construction machine capable of being released into the atmosphere from a part or a rear part, an elbow-shaped tail pipe is detachably mounted via a flange at an outlet of an exhaust pipe connected to a muffler.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a plan sectional view of an exhaust pipe to which a wind-off plate according to the present invention is attached. FIG. 2 shows a side sectional view of the exhaust pipe. FIG. 3 is a sectional view of a tail member to which a fixed louver according to the present invention is attached. FIG. 4 is a sectional view of a tail member to which the rotary louver according to the present invention is attached. FIG. 5 shows a tail pipe mounting diagram according to the present invention.

1 and 2, reference numeral 2 denotes an exhaust pipe connected to the muffler 1. At the outlet of the exhaust pipe 2, a bracket 4 for fixing a windbreak plate 3 is provided in contact with the exhaust pipe 2.
A tap hole is formed at the center of the bracket 4, and a bolt hole is formed at the center of the windbreak plate 3. The V-shaped angle of the windbreak plate 3 is adjusted by inserting a long hole into which the windbreak plate 3 can be inserted on both short sides of the adapter 5 in which a steel plate is wound around an inequilateral prism. A cutout hole into which the wind-off plate 3 can be inserted is provided in each side, and a bolt hole is formed in the center of the other long side of the adapter 5. Then, insert both ends of the wind cutting plate 3 into the notch hole and the long hole of the adapter 5,
The substantially V-shaped bottom of the wind-breaking plate 3 is brought into contact with the bracket 4,
The butterfly bolt 6 is inserted from the bolt hole side of the adapter 5 and screwed into the tap hole of the bracket 4.

Next, another embodiment will be described with reference to FIG. 3. Reference numeral 2 denotes an exhaust pipe connected to the muffler 1, and an outlet of the exhaust pipe 2 has a pipe 7 slightly larger in diameter than the exhaust pipe 2.
a plurality of louvers 7b are provided in parallel with each other, and at least one tail member 7 is provided on the outer periphery of the tail member 7 so as to be inclined with respect to the axial direction of the pipe 7a, that is, the flow direction of the exhaust gas. Seat 7c with a tapped hole
The tail member 7 is fixed to the exhaust pipe 1 by bolts 8.

FIG. 4 shows that the louver 7b of the tail member 7 in FIG. 3 can be adjusted by louver angle adjusting means. Specifically, a small-diameter round bar 7d is parallel to a pipe 7a provided at the outlet of the exhaust pipe 2. And a louver 7b is fixed to a hollow member 7e rotatably fitted to the round steel 7d, and a projecting member 7f having a notch is fixed to a position facing the louver 7b across the hollow member 7d, A louver angle adjusting bar 7h to which a stopper 7g is fixed in a skewered manner is penetrated through a cutout portion of the protruding member 7f. ing.

FIG. 5 shows an elbow-shaped tail pipe 9 having a flange 8a fixed to the outlet of the exhaust pipe 2 connected to the muffler 1 and another flange 8b fixed to the flange 8a. It is fixed.

Next, the operation of the present invention will be described. First, FIG.
And when the wind-off plate 3 shown in FIG.
By moving the adapter 5 back and forth, and adjusting the V-shaped angle of the windbreak plate 3, the flow direction of the exhaust gas can be changed.

Next, when a tail member 7 to which the louver 7b shown in FIG. 3 is fixed is provided, the direction of the louver 7b can be freely changed by rotating the tail member 7 in the circumferential direction of the exhaust pipe 2. The flow direction of the exhaust gas can be changed.

In the case where the louver 7b of the tail member 7 shown in FIG. 4 can be adjusted by the louver angle adjusting means, when the louver angle adjusting bar 7h is slid, the stopper 7g fixed to the louver angle adjusting bar 7h is used. The inclination angle of the louver 7b can be changed.

When the tail pipe 9 is provided through the flanges 8a and 8b shown in FIG.
The direction of the outlet of the tail pipe 9 can be changed vertically and horizontally by changing the angle of attachment to a.

[0019]

According to the present invention, the flow direction of the exhaust gas can be freely changed by the structure described in detail in the embodiment shown in FIGS. 1 to 5, so that a heat insulating material such as asbestos is unnecessary even in a narrow construction site. In addition, a very remarkable effect is achieved, such as enabling smooth construction without moving the construction machine.

[Brief description of the drawings]

FIG. 1 is a plan cross-sectional view of an exhaust pipe to which a windbreak plate according to the present invention is attached.

FIG. 2 shows a side sectional view of the exhaust pipe.

FIG. 3 shows a sectional view of a tail member to which a fixed louver according to the present invention is attached.

FIG. 4 is a sectional view of a tail member to which a rotary louver according to the present invention is attached.

FIG. 5 shows a tailpipe mounting diagram according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Muffler 2 Exhaust pipe 3 Wind cutting board 4 Bracket 5 Adapter 7 Tail member 7b Louver 7h Louver angle adjustment bar 9 Tail pipe

Claims (6)

[Claims] A construction machine in which an upper revolving structure having an engine mounted on a lower traveling structure is rotatably mounted, and engine exhaust can be discharged into the atmosphere from a side or a rear portion of the upper revolving structure via a muffler. 3. An engine exhaust structure for a construction machine according to claim 1, wherein a substantially V-shaped wind-dissipating plate is provided at an outlet of an exhaust pipe connected to the muffler. 2. The air blower according to claim 1, wherein the winder is mounted so as to be rotatable in the circumferential direction of the exhaust pipe, and the V-shaped angle of the winder is adjustable by an adjusting means. Engine exhaust structure of construction machinery. 3. A construction machine capable of revolvingly mounting an upper revolving structure having an engine mounted on a lower traveling structure, and discharging engine exhaust into the atmosphere from a side or a rear portion of the upper revolving structure via a muffler. 3. The engine exhaust structure of a construction machine according to claim 1, wherein a tail member having a plurality of louvers arranged in parallel is provided at an outlet of an exhaust pipe connected to the muffler. 4. The engine exhaust structure for a construction machine according to claim 3, wherein each of the plurality of louvers can be adjusted by louver angle adjusting means. 5. The louver according to claim 3, wherein a tail member disposed in parallel with the louver is mounted to be rotatable in a circumferential direction of the exhaust pipe. Construction machinery engine exhaust structure. 6. A construction machine capable of swingably mounting an upper revolving structure on which an engine is mounted on a lower traveling structure, and discharging engine exhaust into the atmosphere from a side portion or a rear portion of the upper revolving structure via a muffler. 2. An engine exhaust structure for a construction machine according to claim 1, wherein an elbow-shaped tail pipe is detachably attached to an outlet of an exhaust pipe connected to the muffler via a flange.