JP2003090224A - Sound-proof generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a generator with a cooling air intake in a side plate of a generator easing for cooling an engine and the generator, offering compact construction for reducing noises. SOLUTION: The generator 1 having the cooling air intake provided in the side plate of the generator casing for cooling the engine 111 and the generator 112 comprises a perpendicularly bent exhaust duct formed in combination of space between a fan 121 and a body side plate and space between a partitioning plate 118 and a ceiling plate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for reducing noise generated by a power generator. More specifically, the present invention relates to a noise reduction structure in a package type power generator.

[0002]

2. Description of the Related Art A soundproof type generator is used for supplying electric power at a construction site or the like. The soundproof type generator is transported to the site and generates electricity. Conventionally,
As a soundproof technology for a soundproof type generator, Japanese Patent Application Laid-Open No. 2000-282
The one shown in Japanese Patent No. 885 is known. In this structure, a shielding plate or the like having a sound absorbing material is arranged in the structure on the exhaust side.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the technique disclosed in Japanese Patent No. 885, it is difficult to make the entire length of the soundproof type generator compact, and in order to improve the soundproof effect on the exhaust side, the power generator becomes large. As described above, the soundproof type generator is transported to the site and placed at the site. For this reason, when the total length is large, it is easy to carry and install.
Efficiency may be reduced.

[0004]

In order to solve the above problems, the present invention employs the following means. According to a first aspect of the present invention, in the power generator, the side plate of the power generator housing is provided with a cooling air intake for cooling the engine, the generator and the like, and an exhaust duct is provided above the engine.

According to a second aspect of the present invention, there is provided a power generator having a cooling air intake for cooling an engine, a generator and the like provided on a side plate of a power generator housing, wherein an exhaust duct is provided on a fan installation side of the engine. Provided.

According to a third aspect of the present invention, there is provided a power generator having a side plate of a casing of the power generator provided with a cooling air intake for cooling an engine, a generator and the like, wherein an exhaust opening of an exhaust duct is provided by a radiator. It was installed on the engine side.

According to a fourth aspect of the present invention, there is provided a power generator having a cooling air intake for cooling an engine, a generator, etc. provided on a side plate of a power generator casing, wherein a radiator maintenance window is provided above the exhaust duct. A cover is provided on the maintenance window.

According to a fifth aspect of the present invention, there is provided a power generator having side walls of a power generator casing provided with cooling air intakes for cooling the engine, the generator and the like, wherein the ceiling plate of the soundproof case and the upper surface of the engine. A partition plate inclined downward is provided between the partition plates, and the partition plate is provided with one or more bends.

According to a sixth aspect of the present invention, there is provided a power generator in which a side plate of a power generator casing is provided with a cooling air intake for cooling an engine, a generator and the like, and a drain port is provided at a rear end of the partition plate. It is provided.

According to a seventh aspect of the present invention, there is provided a power generator having a cooling air intake port for cooling an engine, a generator and the like provided on a side plate of a power generator casing, wherein a rainwater guide passage is provided vertically from the drain port. The rainwater guide passage is provided at its lower end and connected to the lower frame, and the rainwater guide passage communicates with the outside of the power generator.

According to an eighth aspect of the present invention, there is provided a power generator having a side plate of a power generator casing provided with a cooling air intake for cooling an engine, a generator and the like, wherein a weir is provided at a rear portion of the drainage port. is there.

According to a ninth aspect of the present invention, there is provided a power generator having a side plate of a power generator casing provided with cooling air intakes for cooling an engine, a generator and the like, the rainwater guide passage being in contact with a bottom plate of the muffler chamber. A rainwater guide hole is bored in the contact portion, and the muffler chamber bottom plate is inclined downward toward the rainwater guide hole.

According to a tenth aspect of the present invention, in a soundproof power generator in which a sound absorbing material is arranged inside the power generator housing, a folded portion having a "U" shape in cross section is provided at an end portion of a plate to which the sound absorbing material is attached. The sound absorbing material is fixed by arranging a mounting bracket having.

According to an eleventh aspect of the present invention, there is provided a power generator having side walls of a power generator casing provided with cooling air intakes for cooling the engine, the generator and the like, wherein the ceiling plate of the soundproof case and the upper surface of the engine. In a soundproof type power generator having a partition plate provided between the partition plate and the ceiling slab to serve as an exhaust duct, an intermediate column is provided in a middle portion of the wall surface in the exhaust duct in the left-right direction.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. 1 is a perspective view of the power generator 1, FIG. 2 is a side view showing the internal structure of the power generator 1, FIG. 3 is a rear view of the same, FIG. 4 is a front view of the structure of the opening / closing door 5, and FIG. 6 is a cutaway view of the part, FIG. 6 is a view showing the assembly structure of the opening / closing door 5, FIG. 7 is a view of the upper partition wall 18 as seen from above, FIG. 8 is a side view of the same, and FIG. 9 is a front view of the same.

First, the overall structure of the power generator will be described with reference to FIGS. 1 to 3. A frame 10 is arranged in the lower part of the power generator 1, and the constituent elements of the power generator 1 are arranged on the lower frame 10. A soundproof cover is provided on the lower frame 10 to improve the soundproof effect. In the power generation device 1,
The lower frame 10 and the soundproof cover constitute a casing of the power generation device 1. The power generator 1 is provided with a control panel 2 and a power outlet 3 on the side surface on the short side, and opening / closing doors 4 and 5 on the side surface on the long side. The control panel 2 controls the power generation device 1 and displays the operating state. The electric power generated by the power generation device 1 is taken out by connecting a wire to the power supply outlet 3.

The open / close doors 4 and 5 are constructed to open symmetrically from the center to the left and right sides. As a result, the amount of opening on the side surface of the power generation device 1 can be increased, and maintainability can be improved. Further, intake ports 6, 7 and 7b and a fuel display window 8 are provided on the side surface on the long side of the power generator 1. On the upper part of the power generation device 1, a locking portion 9 for hanging the power generation device 1 is provided. Locking part 9
A reinforcing member 61 is arranged in the vertical direction. The reinforcing member 61 is connected to the lower frame 10 from the upper portion of the power generator 1.

An engine 11, a generator 12, a fuel tank 13 and a battery 14 are arranged in the power generator 1. A generator 12 is connected to the engine 11,
The generator 12 is driven by the output shaft of the engine 11. A battery 14 is arranged beside the generator 12, and a fuel tank 13 is arranged above the generator 12. In FIG. 2, a partition wall 32 that partitions the generator 12 and the fuel tank 13 is arranged horizontally. A shielding plate 25 is provided on the left side of the fuel tank 13,
The engine 11 transmitted to the control box 26 side
It is configured to reduce noise. The partition wall 32 also serves as a support for the fuel tank 13. On the right side of the engine 11, a fan 21, a radiator 17, and a muffler 2
2.23 is provided. A guide 24 is arranged above the muffler 22. The guide 24 guides the cooling air generated by the fan 21 to the exhaust port 30, and is arranged at the upper corner of the power generator 1. The guide 24 is shown in FIG.
As shown in FIG. 5, the T-shaped structure is provided, and is arranged from the front side to the back side of the paper. Also, the guide 24
A sound absorbing material is attached to the to improve the sound deadening effect. The air exhaust port 30 is provided substantially in the center of the upper surface of the power generation device 1. Therefore, in the power generation device 1, the air can be discharged from the position farthest from the outer peripheral portion, and the influence on the surroundings can be reduced.

An air cleaner 16 is arranged above the engine 11, and the upper partition wall 1 is arranged above the air cleaner 16.
8 are provided. The upper partition wall 18 is arranged between the engine 11 and the exhaust port 30. This allows
Noise generated by the engine 11 does not directly go out of the power generation device 1 through the exhaust port 30. Air Cleaner 1
6 is attached to the stay 35 shown in FIG.
An intake chamber 15 is arranged on the lower surface of the upper partition wall 18, and air is introduced into the intake chamber 15 via an intake pipe 34. The intake chamber 15 is connected to the air cleaner 16, and air is supplied to the air cleaner 16 via the intake chamber 15. The air introduced into the air cleaner 16 is supplied to the engine 11. In the power generation device 1, the engine 11
The generator 12 is attached to the lower frame 10 via a vibration isolator. Engine 1 on frame 10
1 and the generator 12 are provided with a pedestal, and the engine 1 is mounted on the pedestal through the vibration-proof materials 27 and 28.
1 and a generator 12 are arranged. Therefore, the vibration transmitted to the cover of the power generation device 1 is reduced and the noise is suppressed.

An intake port and an exhaust port are provided in the upper part of the engine 11, and a central portion of the engine 11 is composed of a cylinder block and a crankcase of the engine 11. The cylinder block accommodates a piston inside and has a cooling water path inside. The crankcase supports the crankshaft. Therefore, the rigidity of the cylinder block and the crankcase is high. Therefore, in the vicinity of the engine 11, the engine noise is relatively small on the side of the cylinder block in the center of the engine. An oil pan 29 is provided below the engine 11. Oil pan 29
A drain 33 is connected to the drain 33 and allows the engine oil to be discharged from the outside of the lower frame 10.

Next, the structure of the opening / closing door 5 will be described with reference to FIGS. The opening / closing door 5 is configured to be openable / closable on the side surface of the power generator 1. As shown in FIG. 4, an opening 7 is provided on the front surface of the opening / closing door 5, and air is introduced into the power generation device 1 through the opening 7. A hinge 41 is attached to the side end of the opening / closing door 5.
41 is fixed and is configured to be openable and closable around the hinges 41. Further, a grip portion 44 is provided on the side opposite to the side where the hinge 41 is provided,
The opening / closing door 5 is opened / closed by the grip portion 44. The opening / closing door 5 is mainly composed of a front surface portion 42 and an intake duct 43. The front surface portion 42 constitutes the front surface of the opening / closing door 5, and is located on the outer surface of the power generator 1. The intake port 7 is provided in the lower portion of the front surface portion 42 on the hinge 41 side as described above. The intake duct 43 is attached to the rear surface of the front portion 42.

The intake duct 43 is fixed to the front surface portion 42 by a fastener such as a bolt. Intake duct 43
The rear surface (the surface located inside the power generation device) is configured to be flat and has a configuration in which there is little overhang into the power generation device. A plate 49 is configured in the intake duct 43, and the plate 49 of the intake duct 43 and the front surface portion 42 are fixedly mounted by a fastener. The intake duct 43 is detachable from the front surface portion 42. The intake duct 43 is provided with an outside air outlet 45, and the air introduced from the intake port 7 of the front face portion 42 is introduced into the power generator 1 from the outside air outlet 45.

Sound absorbing materials 46, 47 and 48 are arranged between the front surface portion 42 and the intake duct 43. The sound absorbing material 46 is arranged on the back surface of the front surface portion 42. In the sound absorbing material 46, the portion corresponding to the intake port 7 is cut out, and the sound absorbing material 46 does not hinder the introduction of air from the intake port 7. Further, the sound absorbing material 46 has a configuration in which a portion corresponding to a bolt mounting portion for attaching the intake duct 43 to the front surface portion 42 is cut out so that the intake duct 43 can be reliably attached to the front surface portion 42. . The sound absorbing material 47 is disposed on the inner upper surface and the inner side surface of the intake duct 43, and the adsorbent 48 is disposed on the inner front surface of the intake duct 43. Adsorbent 48
The outside air outlet 45 side portion has a configuration in which a portion overlapping the outside air outlet 45 is cut out.

The intake duct 43 is fixed to the rear surface of the front surface portion 42 and is integrally formed with the opening / closing door 5. As a result, the degree of freedom of the arrangement position of the intake port 7 and the arrangement position of the outside air outlet 45 can be improved, and the intake port 7 and the outside air outlet 45 can be easily provided at a position where noise is low in the power generator. The noise-reducing position in the power generation device 1 can be reduced by arranging it in a position where engine noise is low, a position where generator noise is low, a cooling wind noise of the generator is low, or the like. . Further, since the intake duct 43 is fixedly installed on the opening / closing door 5, the rigidity of the opening / closing door 5 is improved, and noise from the side portion of the power generation device 1 can be reduced. Further, since the rear surface of the intake duct 43 is flat, it is possible to reduce the number of parts of the sound absorbing material to be attached to the inside of the intake duct 43 and the number of attaching steps. Furthermore, the length of the intake path in the intake duct 43 can be increased, and the sound absorbing effect can be improved. The opening / closing door 5 serves as a double partition wall to enhance the sound insulation effect. In the opening / closing door 4 as well, noise can be reduced by similarly introducing the intake port 7b into the housing of the power generation device 1 via the duct provided on the inner surface of the opening / closing door 4.

Next, referring to FIG. 7 to FIG. 9, the upper partition wall 1
The configuration of No. 8 will be described. The upper partition 18 is the power generator 1
It is arranged in the upper part of the engine 11 from one side surface to the opposite side. The upper partition 18 is connected to the radiator mounting portion 65 and the reinforcing member 61. That is, the space between the ceiling plate that constitutes the upper part of the soundproof cover of the power generator 1 and the upper partition wall 18 serves as an air exhaust duct. Thereby, an exhaust path using the inner surface of the soundproof cover can be configured in the power generator 1, and the power generator 1
It is possible to reduce noise while making the compact.
Furthermore, the engine room and the exhaust path on the downstream side of the radiator 17 can be reliably separated, and the cooling effect can be improved. The intake chamber 15 is connected to the lower surface of the upper partition wall 18, and the guide 51 is disposed on the upper surface. The guide portion of the guide 51 extends toward the exhaust port 30, and the guide 51 is arranged in a direction perpendicular to the exhaust path. The guide 51 serves as a baffle plate against the noise passing over the upper partition wall 18, and when the sound wave of the noise hits the guide 51,
The sound waves are dispersed and the sound deadening effect is improved. Furthermore, a sound absorbing material is attached to the exhaust path side (exhaust path side) of the guide 51, whereby a further sound deadening effect can be obtained. Further, the guide 51 may be arranged horizontally as well as in the oblique direction with respect to the exhaust path as described above.

The intake chamber 15 has a lower pipe 54 and side pipes 53 for communicating the inside and outside of the intake chamber 15.
Is provided. A plurality of partition plates 52, 52 ... Are arranged in the intake chamber 15. A lower pipe 54 is arranged on the bottom surface of the intake chamber 15. The intake pipe 34 is connected to the lower pipe 54, and the air in the power generator 1 is introduced into the intake chamber 15 via the intake pipe 34 and the lower pipe 54. A side pipe 53 is arranged on the side surface of the intake chamber 15. Side pipe 5
An air cleaner 16 is connected to 3. The lower pipe 54 and the side pipe 53 are connected to the intake chamber 1
It has a configuration in which a certain amount is projected into the inside of 5. By adjusting the amount of protrusion into the intake chamber 15, the frequency characteristic of the intake chamber 15 can be adjusted, and the sound deadening effect can be improved.

The partition plate 52 arranged in the intake chamber 15 is arranged so as to block a straight line path connecting the outlet side of the lower pipe 54 and the side pipe 53. The partition plate 52 is connected to one inner surface of the intake chamber 15,
The structure is such that the inner surfaces are alternately connected to each other. As a result, the intake path in the intake chamber 15 can be lengthened, a maze can be formed, and the sound absorbing effect can be improved.

The radiator 17 is connected at its upper portion to the radiator mounting portion 65 and is connected at its lower portion to the radiator mounting portion 62. And the radiator mounting portion 62
A guide plate 63 is fixed to the upper part of the. Guide plate 6
Reference numeral 3 is configured in a V shape when viewed from the side, and directs exhaust air discharged through the radiator upward. The exhaust air directed upward by the guide plate 63 is directed toward the upper partition wall 18 by the guides 24 arranged at the corners of the housing of the power generator 1. The exhausted air that has passed over the upper partition wall 18 is directed to the exhausted air outlet 30 by the guide plate 64 arranged near the locking portion 9. The guide plate 64 is arranged downstream of the exhaust air in the upper partition wall 18, and is arranged obliquely with respect to the upper partition wall 18. As a result, the muffling effect can be improved while reducing the exhaust air resistance. A seal member such as a weather strip is attached to the upper end of the guide plate 64.
The noise of the engine 11 is prevented from leaking from between the soundproof cover and the soundproof cover, and rainwater and dust are prevented from entering.

In the present embodiment, because of the above-mentioned structure, the cooling air generated from the fan 21 is generated by the radiator 17
Through the guide plate 63 to the upper side, and the muffler 2
After passing through the muffler chamber in which 2, 2, etc. are arranged, the guide 24 arranged at the corner portion of the casing of the power generator 1 directs the upper partition wall 18 side, passes through the upper partition wall 18, and passes through the exhaust port. More discharged. In this way, by vertically bending the exhaust duct by combining the muffler chamber, the upper partition wall and the ceiling plate, the exhaust path can be wide and long, and the power generator itself can be made compact. It is composed.

Next, another embodiment of the present invention will be described with reference to the drawings. 10 is a side view showing the internal configuration of the power generation device 101 of the second embodiment, FIG. 11 is a plan view of the same, and FIG. 12 is a rear view of the same.

A power generation device 101 will be described with reference to FIGS. 10 to 12.
The internal configuration of will be described. Also in the power generation device 101 in another embodiment, the lower frame 200 configured by a member having a C-shaped cross section is disposed in the lower portion. The lower frame 200 is arranged outside the lower frame 110. An engine 111, a generator 112, a fuel tank 113, and a battery 114 are arranged inside the power generator 101. A generator 112 is connected to the engine 111, and the output shaft of the engine 111 drives the generator 112. The engine 111 is arranged substantially in the center of the housing, and the generator 11 is provided on one side.
2 is provided, a fuel tank 113 is provided on the other side, and a battery 114 is provided above the generator 112.

In FIG. 10, a vertical partition wall 131 is provided on the side surface of the casing of the generator 112, and the intake port 10 is located further on the side surface of the casing than the partition wall 131.
8 are provided. The partition wall 131 reduces heat and noise transmitted to the control box 102.

A fan 121, a radiator 117, and a muffler 122.1 are arranged on the fuel tank 113 side of the engine 111.
23 are provided. A guide 124 is arranged above the muffler 122. Guide 124 is fan 121
The cooling air generated by the above is guided to the exhaust port 130 side, and is disposed at the upper corner of the power generation device 101. As shown in FIG. 11, the exhaust port 130 is provided in the approximate center of the upper surface of the power generation device 101. Therefore, the power generation device 101
In the above, the air can be exhausted from a position distant from the outer peripheral portion, and the influence on the surroundings can be reduced. Further, on the upper surface of the power generator 101, a locking portion 109 is provided adjacent to the air outlet 130 for hanging the power generator 101 in the direction opposite to the muffler chamber direction.

An air cleaner 116 is provided above the generator 112.
Is provided, and the intake chamber 115 is provided slightly above the air cleaner 116. The intake chamber 115 is fixed to the back surface of the ceiling of the housing. Intake chamber 134.1 in intake chamber 115
20 are connected. Air is introduced into the intake chamber 115 via the intake pipe 134. The air through the intake chamber 115 is introduced into the air cleaner 116 through the intake pipe 120. And Air Cleaner 116
The air introduced into the engine is supplied to the engine 111. In the power generator 101, the engine 111 and the generator 112 are attached to the lower frame 110 via a vibration isolator. The lower frame 110 is provided with a pedestal for mounting the engine 111 and the power generator 112, and the engine 111 and the power generator 112 are arranged on this pedestal via vibration damping materials 127 and 128.
Therefore, the vibration transmitted to the lower frame 110 is reduced, and the noise generated from the cover of the power generation device 101 is suppressed.

Two pipes arranged vertically are connected to the bottom surface of the intake chamber 115. This pipe connects the intake chamber 115 and the intake pipes 134 and 120. The pipe fixed to the bottom surface of the intake chamber 115 is configured to project into the intake chamber 115 by a certain amount. By adjusting the amount of protrusion into the intake chamber 115, the frequency characteristic of the intake chamber 115 can be adjusted, and the silencing effect can be improved. The pipes arranged in the intake chamber 115 are the intake chamber 115 and the intake pipe 1.
Any device that connects 34 and 120 may be used, and the power generation device 1
Depending on the internal configuration of 01, it may be arranged horizontally, and is not particularly limited.

Next, the arrangement of the muffler will be described. The series of mufflers 122 and 123 is formed in an elliptic cylinder shape, and the ellipsoidal surface is oriented toward the long side of the power generation device 1 and the radiator side is arranged slightly downward. A series of mufflers 122 and 123 are arranged vertically in the housing. Muffler 122 above muffler 123
Is provided. An exhaust pipe 171 is connected to the exhaust manifold of the engine 111, and the exhaust pipe 171 is connected to the muffler 122. The muffler 122 and the muffler 123 are connected by a pipe 185, and the muffler 123
A pipe 184 for discharging exhaust gas to the outside of the housing is connected to the. The exhaust gas of the engine 111 is introduced into the muffler 122 through the pipe 171, and is supplied to the muffler 123 through the pipe 185. And muffler 123
Exhaust gas through the pipe is discharged from the pipe 184.

In the power generator 101 having the above structure, the cooling air generated by the fan 121 is generated by the radiator 11
7 and passing through radiator 117, muffler chamber 141
to go into. The bottom plate 142 of the muffler chamber is provided with a step portion 142a folded in a V shape in side view, and the cooling air is guided upward by being guided by the bottom plate 142 bent in a V shape. Then, the exhaust air is discharged from the T located above the muffler chamber 141.
The character-shaped guide plate 124 guides the space between the upper partition 118 and the ceiling plate, and the air is discharged from the air outlet 130 to the outside of the housing.
In this way, by combining the muffler chamber, the upper partition wall and the ceiling plate, and forming a vertically bent air exhaust duct,
The exhaust path can be wide and long, and the power generator itself is compact.

As shown in FIGS. 10 to 12, partition plates 70, 70 are arranged on the upper partition wall 118 along the exhaust path. The partition plates 70, 70 are configured to be parallel to each other, and are erected on the upper partition wall 118. The plurality of partition plates 70 direct exhaust air from the corner portion of the power generation device 101 to the exhaust air outlet 130 and muffle the sound. A sound absorbing material is attached to the partition plate 70 to reduce noise transmitted through the exhaust path. The partition plate 70 is arranged in the direction along the exhaust path (parallel to the exhaust air), but it may be arranged obliquely with respect to the exhaust air. By increasing the projected area with respect to the direction in which the exhaust air flows, leakage of engine noise can be reduced, and by disposing along the exhaust air direction, exhaust resistance can be reduced. That is, the partition plate 70 disposed on the upper partition 118 can adjust the exhaust efficiency of cooling air and the reduction of noise. Also, while suppressing the exhaust resistance,
It is also possible to improve the sound deadening effect.

A radiator maintenance window 135 is provided above the radiator 117 to facilitate the maintenance of the radiator. A cover is attached to the maintenance window. Normally, if the window is closed with the cover, noise does not leak from the window to the outside of the power generator.

Next, the structure of the upper partition 118 of the power generator 101 will be described in detail below. The upper partition wall 118 is disposed between the engine 111 and the exhaust port 130. As a result, the noise generated by the engine 111 does not directly go out of the power generation device 101 through the exhaust port 30. The upper partition 118 is provided with the engaging portion 109 and the discharge port 1.
The power generation device 101 is provided so as to be inclined downward from the position between 30 and 30 toward the right side of the drawing. The upper partition 118 is bent once in the middle and then again, and the final bent surface is a horizontal surface. In this way, the upper partition wall 118 is configured to be bent in order to reduce the exhaust air resistance. It should be noted that the exhaust air resistance can be reduced by providing at least one stepped portion, and the invention is not limited to providing two stepped portions as shown in the embodiment.

A drainage port 137a is formed at four corners in the front, rear, left and right of the horizontal plane, and a rainwater guide passage 137 is provided in the lower part of the drainage port 137a in the vertical direction, and a lower end portion of the rainwater guide passage 137 is provided. The drain outlet 137b of the device is connected to the outside of the machine body. The lower end of the rainwater guide passage 137 is connected to the upper portion of the lower frame 200, and a drain outlet 137b is formed on the upper portion of the lower frame 200. The four cylindrical rainwater guide passages 137 provided in the vertical direction serve as a reinforcing member that supports the power generation device 101. Therefore, it is not necessary to separately provide a member such as the reinforcing member 61 shown in the previous embodiment.

With such a structure, rainwater can be absorbed by the upper partition wall 11
The water flows along the inclination of 8 onto the horizontal plane, flows into the rainwater guide passage 137 through the drainage ports 137a provided at the four corners of the horizontal plane, and is discharged from the body through the drainage outlet 137b at the lower end of the rainwater guide passage. It should be noted that in order to prevent rainwater or the like that has fallen along the upper partition wall 118 from passing through the rainwater guide passage 137 and being applied to the radiator 117 or the like located immediately behind the rainwater guide passage 137, the rear surface upper end portion of the rainwater guide passage 137 on the radiator 117 side is prevented. A weir 125 is provided in the.

Muffler chamber bottom plate 14 of rainwater guide passage 137
A guide hole 137c is formed in a portion where 2 abuts. Water passes over the weir 125 and rear muffler chamber 141
Even if it has entered, it can flow into the rainwater guide passage 137. Since the muffler chamber bottom plate 142 is inclined downward in the guide hole direction, the water flowing into the muffler chamber flows along the bottom plate 142 inclined in the guide 137c hole direction. Then, it is once received by the step 142a provided on the bottom plate 142 and flows into the rainwater guide passage 137 through the guide hole 137c.

Next, a method of fixing the sound absorbing material arranged in the housing will be described with reference to FIGS. 13 to 16. As shown in FIG. 15, the conventional guide 124 has a screw 1
The sound absorbing material 136 was screwed to the housing at 43, and the sound absorbing material 136 was attached by an adhesive or the like. Although this method is easy to work, there is a possibility that peeling may occur particularly in a portion where the weight of the sound absorbing material is applied to the adhesive surface due to the time-dependent deterioration of the adhesive due to the impact during transportation and the severe use environment. Therefore, according to the present invention, as shown in FIG. 16, at the upper and lower ends, the left and right ends, or the four-sided end portions of the guide 124 formed of a plate body such as a steel plate,
The folded-back portion 124a is formed by bending it in a U-shape when viewed in cross section. The folded-back portion 124 a is formed by the sound absorbing material 13.
In order to hook the end of 6, the guide 124
Is made longer than the length of the sound absorbing material 136 by thickness t or more on both sides, is bent at the end of the sound absorbing material 136, and is further bent at the position of the thickness t from the bent position, The U-shaped folded portion 124a is provided.

With this structure, the sound absorbing material 1
By fixing 36 with an adhesive and locking it at the folded-back portion 124a, the reliability against peeling is improved as compared with the case where the adhesive is applied only with the adhesive. There is a method of fixing a sound absorbing material by providing a fixing rib in the middle as in the past, or fixing with a pin, but in the case of a fixing rib, the area of the rib covering the surface of the sound absorbing material becomes large, so the sound absorbing material in the central part is absorbed. The area becomes smaller and the soundproofing effect decreases. Further, when fixing with a pin, the sound absorbing material around the dish portion of the pin is compressed, and the soundproof effect of this portion is reduced. When the sound absorbing material is fixedly mounted by the mounting bracket having the folded-back portion, the portion of the returning portion that covers the sound absorbing material is limited to the end portion of the sound absorbing material, and the soundproof effect is not deteriorated.

Further, as shown in FIG. 14, the case where the sound absorbing material 138 to be attached to the side surface of the housing is fixed by the metal fitting 139 having the folded portion will be described with reference to FIGS. 17 to 19. First, the second embodiment in FIG. 17 will be described. The mounting bracket 139 is formed by bending a plate into a crank shape in a sectional view, and fixes the fixing portion 139b to the flat housing and the sound absorbing material 13.
8 has a holding portion 139c, and the holding portion 139c is not caught by the sound absorbing material 138, and the sound absorbing material 138 is not peeled off due to deterioration of the adhesive material.
a.139a ... are provided. The hook portion 139a uses burrs, and when a hole is formed by using a punch, a drill, or the like, burrs are generated. However, the burrs are removed because they usually cause injury or damage to the product. In the present embodiment, conversely, burrs are effectively used, and the gap between the punch and the die during punching is made as large as possible so that large burrs are generated. By opening a large number of these holes, the catch 1
The number of 39a, 139a, ... Is increased, and the sound absorbing material 1 is surely provided.
38 can be hooked and fixed. Further, since the exposed portion of the sound absorbing material 38 is also increased, the sound absorbing effect is also improved.

Mounting bracket 157 of the third embodiment shown in FIG.
Is a fixed part 1 to the housing by bending the steel plate in a U shape.
57a and a pressing portion 157b for the sound absorbing material 38, and a catching portion 157c is formed on the pressing portion 157b.
The catch 157c is formed by forming a notch 157d by processing a circular punch or the like on the end side of the pressing portion 157b, and processing the adjacent notches 157d and 157d so as to overlap each other, thereby forming a pointed portion between the notches 157d and 157d. Is formed, and the pointed portion is bent when pressed during the shearing process to form a catch 157c. The sound absorbing material 138 is locked without displacement by providing a large number of the catching portions 157c, and the sound absorbing effect can be improved by exposing the sound absorbing material in the notch 157d. Mounting bracket 158 of the fourth embodiment shown in FIG.
Is made by bending a steel plate into a hat shape in cross section, and fixing portions 158a to the housing and pressing portions 158b and 158b of the sound absorbing material 138.
And a catching portion 158c is formed on the pressing portion 158b. The catch 158c has a triangular shape or a quadrangular shape while the punch has a circular shape, and a pointed part is formed to form the catch 158c. In this case, the sound absorbing material 138 can be pressed and attached to both sides of the attachment fitting 158. The cross-sectional shape of the mounting brackets 139, 157, and 158 is U-shaped, or may be a shape having a bent portion on one side or both sides, and is limited as long as it has a folded portion. is not. Further, the shape of the punch is not limited as long as it can cut and form a circular shape or a combination of square shapes to form a pointed portion.

With such a structure, the sound absorbing material is pressed and hooked by the mounting metal fittings, so that the sound absorbing material is securely fixed to the inside of the housing by being used together with the adhesive material, and the exhaust efficiency and the soundproofing are achieved. As a result, the reliability required for a portable soundproof type power generator that is often used on the go is improved.

Next, with reference to FIG. 10, FIG. 16 and FIG. 17, an explanation will be given of the intermediate support column in the soundproof type power generator having the structure in which the exhaust duct is provided between the partition plate and the ceiling slab.

As shown in FIG. 10, the exhaust duct at the upper part of the casing from the guide 124 to the exhaust port 130 can have a wide and long exhaust passage, so that the sound energy can be reduced while suppressing the exhaust resistance. And noise can be efficiently reduced. On the other hand, having a large space without a structure in the upper part of the housing has a problem that the strength when an external force is applied to the upper part of the housing is lower than other parts. In particular, soundproof power generators are often transported and used, and when stored, there are cases where they are stored in two or three stacks, so if the strength of the top of the housing is low, the top of the housing will deform. There is a possibility that it may not be able to be stored in a piled state, that the exhaust path of the exhaust duct section becomes narrow, the efficiency of exhaust air may be reduced, and that the sound absorbing material may be separated.

Therefore, as shown in FIG.
Ceiling plate that constitutes the upper part of the soundproof cover and the upper partition wall 118
The space between and is used as an exhaust duct, and at least one or more intermediate columns 140 are provided upright in the middle of the exhaust duct. The intermediate strut 140 is erected along the side wall so as not to resist the exhaust air. In this embodiment, the engine 1
A stay 166 for partitioning the radiator is provided on the inner wall of the housing accommodating
Is fixed by screws, and the radiator partition stay 166 has its upper and lower portions connected to the radiator mounting portion to increase its strength. An intermediate strut 140 is provided on an upper extension of the radiator partition stay 166. In this way, the strength of the upper part of the housing is improved.

Further, since the sound absorbing material is also attached to the inner wall of the exhaust duct, the intermediate support 140 uses the sound absorbing material fixing metal fitting having the folded portion shown in FIGS. 17 to 19 as the intermediate support. be able to. In this case, it becomes a structure that doubles as a reinforcement for the exhaust duct and a mounting bracket for the sound absorbing material,
The number of parts can be reduced.

According to the present invention, as described in claim 1, a side wall of a power generator casing is provided with a cooling air intake for cooling an engine, a generator and the like, and an exhaust duct is provided above the engine. Therefore, the exhaust passage can be configured to be wide and long,
The energy of sound can be reduced while suppressing the resistance of exhaust air to a low level, and noise can be effectively reduced.

According to a second aspect of the present invention, there is provided a power generation device in which a cooling air intake for cooling an engine, a generator, etc. is provided on a side plate of a power generation device housing, and an exhaust duct is provided on a side where an engine fan is arranged. Since it is provided, the exhaust air passage can be wide and long, and the energy of the sound can be reduced while suppressing the resistance of the exhaust air to a low level, and the noise can be effectively reduced.

According to a third aspect of the present invention, there is provided a power generator having a side plate of a casing of the power generator provided with a cooling air intake for cooling an engine, a generator and the like. Since it is provided on the engine side, the exhaust air passage can be configured to be wide and long, and the sound energy can be reduced while suppressing the exhaust air resistance, and noise can be effectively reduced.

According to a fourth aspect of the present invention, there is provided a power generator having a cooling air intake port for cooling an engine, a generator and the like provided on a side plate of a power generator casing, wherein a radiator maintenance window is provided above the exhaust duct. Since the cover is provided on the maintenance window, the cover can be opened for easy work during maintenance of the radiator, and sound can be prevented from leaking to the outside by closing the cover except during maintenance.

According to a fifth aspect of the present invention, there is provided a power generator having side walls of a power generator casing provided with cooling air intakes for cooling the engine, the generator and the like, the ceiling plate of the soundproof case and the upper surface of the engine. Since a partition plate that slopes downward is provided between them, rainwater that has entered from the exhaust port can smoothly flow on the partition plate, and since the partition plate is provided with one or more bends, it has less wind exhaust resistance. can do.

According to a sixth aspect of the present invention, there is provided a power generator having a side plate of a power generator casing provided with a cooling air intake for cooling an engine, a generator and the like, wherein a drain port is provided at a rear end of the partition plate. Since it is provided, the water on the partition plate can flow into the drain port. Therefore, water does not collect on the partition plate, and corrosion of the iron plate can be prevented. In addition, since the drainage ports are provided at the four corners, even if the power generation device is installed at an inclination, the drainage can be reliably performed by any of the drainage ports.

According to a seventh aspect of the present invention, there is provided a power generator having a side plate of a power generator casing provided with a cooling air intake for cooling an engine, a generator and the like, wherein a rainwater guide passage is provided vertically from the drain port. Provided, the lower end of the rainwater guide passage is connected to the lower frame, and since the rainwater guide passage communicates with the outside of the power generator, the water on the partition plate that has flowed into the drainage port flows through the rainwater guide passage, so the other parts etc. You can prevent it.

According to the eighth aspect of the present invention, there is provided a cooling air intake for cooling the engine, the generator and the like on the side plate of the power generator casing, and the weir is provided at the rear of the drainage port. It is possible to prevent the water flowing on the partition plate from overcoming the drainage port and splashing on the radiator located immediately behind the drainage port.

According to a ninth aspect of the present invention, there is provided a power generator having a side plate of a casing of the power generator provided with a cooling air intake for cooling an engine, a generator and the like, which is in contact with the bottom plate of the muffler chamber of the rainwater guide passage. Since a rainwater guide hole is bored in the contacting portion and the muffler chamber bottom plate is inclined downward toward the rainwater guide hole direction, even when rainwater or the like gets over the weir and enters the rear muffler chamber, It can flow on the bottom plate of the muffler chamber that is inclined toward the rainwater guide passage, and can flow into the rainwater guide passage from a guide hole formed in the rainwater guide passage.

According to a tenth aspect of the present invention, in a soundproof power generator in which a sound absorbing material is arranged inside a power generator housing, a folded-back portion having a U-shaped cross section is provided at an end of a plate body to which the sound absorbing material is attached. Since the sound absorbing material is fixed by arranging the mounting metal fittings with, the sound absorbing material is stretched on the plate of the inner wall of the housing, and even if the adhesive part is peeled off after a long period of time after installation, the sound absorbing material can be received by the folded part. As a result, peeling can be prevented and sagging can be prevented, so durability can be improved and maintenance intervals can be extended. Further, since it is simply bent and manufactured, it is easy to process, there is no step of assembling the fixture, and it can be manufactured at low cost.

According to an eleventh aspect of the present invention, there is provided a power generator having a side plate of a casing of the power generator provided with a cooling air intake for cooling the engine, the generator and the like, wherein the ceiling plate of the soundproof case and the upper surface of the engine. In a soundproof power generating device having a partition plate provided between the partition plate and the ceiling slab to serve as an exhaust duct, an intermediate column is provided in a middle portion of the wall surface in the exhaust duct in the left-right direction. The strength of the upper part has improved, and it is possible to stack multiple generators at the time of shipping or storing,
It can also suppress vibration and contribute to noise reduction.

[Brief description of drawings]

FIG. 1 is a perspective view of a power generator 1.

FIG. 2 is a side view showing the internal configuration of the power generator 1.

FIG. 3 is a rear view of the same.

FIG. 4 is a front view showing the configuration of an opening / closing door 5.

FIG. 5 is a partially cutaway side view of the same.

FIG. 6 is a diagram showing an assembly configuration of an opening / closing door 5.

FIG. 7 is a view of the upper partition wall 18 as viewed from above.

FIG. 8 is a side view of the same.

FIG. 9 is a front view of the same.

FIG. 10 is a side view showing the internal configuration of the power generation device 101 according to the second embodiment.

FIG. 11 is a plan view of the same.

FIG. 12 is a rear view of the same.

FIG. 13 is a side view of the power generation device 101.

FIG. 14 is a rear view of the same.

FIG. 15 is a guide 124 in which a sound absorbing material is attached by an adhesive.
FIG.

FIG. 16 is a side sectional view of a guide 124 in which a sound absorbing material is fixedly mounted by a return portion 120.

FIG. 17 is a diagram showing a second embodiment of a fixing metal member for fixing the sound absorbing material to the side surface of the housing.

FIG. 18 is a view showing a third embodiment of a fixing metal member for fixing the sound absorbing material to the side surface of the housing.

FIG. 19 is a view showing a fourth embodiment of a fixing fitting for fixing the sound absorbing material to the side surface of the housing.

[Explanation of symbols]

1 generator 5 open / close door 11 engine 12 generator 15 Intake chamber 17 Radiator 18 Upper partition 21 fans 24 guides 30 air outlet 61 Reinforcement member 64 guide plate 101 power generator 111 engine 112 generator 115 Intake chamber 117 Radiator 118 Upper partition 120 Return part 121 fans 124 Guide 125 weir 130 Exhaust port 135 radiator maintenance window 136 ・ 138 Sound absorbing material 140 Middle support 141 muffler room 142 Bottom plate 146/147/148 sound absorbing material

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F02B 77/13 F02B 77/13 MQ

Claims (11)

[Claims] 1. A sound-generating power generation system, comprising a side plate of a power generation device casing provided with a cooling air intake for cooling an engine, a generator, etc., characterized in that an exhaust duct is provided above the engine. apparatus. 2. A power generator having a cooling air intake for cooling an engine, a generator and the like on a side plate of a power generator casing, wherein an exhaust duct is provided on a side of a fan of the engine. The soundproof power generator according to claim 1. 3. A power generator having a side plate of a casing of a power generator provided with a cooling air intake for cooling an engine, a generator, etc., wherein an exhaust opening of an exhaust duct is provided closer to the engine than a radiator. The soundproof power generator according to claim 1 or 2, characterized in that. 4. A power generator having a cooling air intake for cooling an engine, a generator and the like on a side plate of a generator casing, wherein a radiator maintenance window is provided above the exhaust duct and the maintenance window is covered. The soundproof power generation device according to claim 1, further comprising: 5. A power generator having a side plate of a power generator casing provided with a cooling air intake for cooling an engine, a generator, etc., which is inclined downward between a ceiling plate of a soundproof case and an upper surface of the engine. A soundproof power generating device comprising a partition plate, and the partition plate having one or more bends. 6. A power generator in which a side plate of a power generator housing is provided with a cooling air intake for cooling an engine, a generator, etc., characterized in that a drain port is provided at a rear end portion of the partition plate. The soundproof power generator according to claim 5. 7. A power generator having a side wall of a power generator casing provided with a cooling air intake for cooling an engine, a generator, etc., wherein a rainwater guide passage is provided vertically from the drain outlet, and a rainwater guide passage lower end is provided. Is connected to a lower frame, and the rainwater guide passage communicates with the outside of the power generation device. 8. A power generator having a side plate of a power generator casing provided with a cooling air intake for cooling an engine, a generator and the like, wherein a weir is provided at a rear portion of the drainage port. Alternatively, the soundproof power generator according to claim 7. 9. A power generator having a side plate of a power generator casing provided with a cooling air intake for cooling an engine, a generator, etc., wherein a rainwater guide hole is provided in a portion of the rainwater guide passage abutting the bottom plate of the muffler chamber. 9. The soundproof power generating apparatus according to claim 7, wherein the muffler chamber bottom plate is inclined downward toward the rainwater guide hole direction. 10. A soundproof power generating device in which a sound absorbing material is disposed inside a power generating device housing, wherein a mounting bracket having a folded portion having a U-shaped cross section is arranged at an end of a plate to which the sound absorbing material is mounted. A soundproof power generating device characterized by fixing a sound absorbing material. 11. A power generator in which a side plate of a power generator casing is provided with a cooling air intake for cooling an engine, a generator, etc., wherein a partition plate is provided between a ceiling plate of a soundproof case and an upper surface of the engine. 2. A soundproof power generating apparatus having an exhaust duct between the partition plate and the ceiling slab, wherein an intermediate column is provided at a middle portion of a wall surface in the exhaust duct in the left-right direction. The soundproof power generator according to claim 2.