JP3018226B2 - Open / close door of large engine working machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door for a large engine working machine in which a large-capacity generator or the like having a large engine is arranged.

[0002]

2. Description of the Related Art Engine working machines (engine generators, engine welding machines, engine compressors, engine pumps, etc.) driven by engines used in outdoor construction work sites are used in cities with densely populated houses and at night. When used, due to the problem of noise in each city, the restrictions on use are stricter due to various regulations, so the soundproof box itself tends to be larger because it covers the entire engine working device and provides soundproofing measures . In addition, since these working machines are used outdoors and are left undisturbed, a large number of cooling air intake holes are provided on the walls of these soundproof boxes (casings) surrounding the engine and the like. It was necessary to take measures against rainwater entering through the suction hole. In such an outdoor engine working machine, inspection of the internal engine, especially inspection of the engine engine oil, cooling water, fan belt, etc. is mandatory before starting, so it is surrounded by soundproof walls. A soundproof box (casing) is usually provided with an opening / closing door.

For example, as a countermeasure against rainwater, the air passage from the intake port of the casing is bypassed to blow out from the inner surface of the opening / closing door to the inside.
A device described in Japanese Patent Laid-Open Publication No. 5 (1999) -2005 is proposed. Further, Japanese Unexamined Utility Model Publication No. 63-8821 discloses a cooling air inlet disposed at an upper part, a rear part and a bottom part of a side wall of a soundproof wall surrounding an engine of an internal mechanism, and the cooling air inlet is elongated. Several slit-shaped long holes are drilled, and an eave portion inclined downward is provided on the outside, and the inside of the cooling air inlet is the same width as the width of the inlet, and the upper opening is introduced. A structure in which a guide duct is formed by welding is disclosed. Further, Japanese Patent Publication No. Hei 5-67767 discloses that an intake port is formed below a rear end wall of a soundproof casing of an engine working machine, and a guide plate for intake guide is fixed inside the casing so that intake air is directed upward. A structure is disclosed in which the cooling air is guided in a meandering manner so as to guide the cooling air downward.

[0004]

In a conventional engine working machine, when a large-capacity engine engine or working machine is used, the soundproof box covering the entire working machine becomes large for soundproofing. There has been a problem that the cooling efficiency is reduced or rainwater countermeasures and the like are not sufficiently performed due to the number of installation locations of the ventilation holes and the size of the ventilation holes on the wall surface of the entire soundproof box. Furthermore, the opening and closing doors of large engine working machines also become large, and the strength of a single plate made of steel plate etc. is weak, and the doors are pierced. It was troublesome and costly.

[0005] The soundproof wall / opening / closing door disclosed in Japanese Utility Model Publication No. 49-12495 is provided with a cooling air blowing surface which is formed by meandering air taken in from an intake port for the purpose of soundproofing and sucking inward. This intake port and ventilation surface are provided inside, which not only has excellent soundproofing effect, but also prevents rainwater from entering the internal engine, but because the holes are small, the ventilation volume is small and the cooling efficiency is poor, The structure of the door is extremely complicated, and has the disadvantage that the entire door is heavy. Also,
The cold air inlet of Japanese Utility Model Publication No. 63-8821 is not installed on the opening and closing door, and the number of the cold air inlet is small. Moreover, since the slit opening is small, the amount of air flow by the intake air is small, and the cooling efficiency of the engine and the like is low. Furthermore, it is Japanese Patent Publication 5-677
The cooling air inlet described in Japanese Patent Publication No. 67 is formed only on the lower side of the rear wall of the soundproof casing, and one guide plate is fixed, and only cool air is passed from below. It was not suitable for cooling large engines suitable for many applications. In a large-sized soundproof work machine, an opening / closing door for internal inspection also becomes large, and it is necessary to provide reinforcing materials in a vertical direction and a horizontal direction in order to reinforce the opening / closing door formed of a steel plate. An object of the present invention is to provide a cooling measure for an opening / closing door on an outer wall equipped with a large-capacity engine capable of performing many operations such as welding work and compression work at the same time. An object of the present invention is to provide an opening / closing door for a large engine working machine provided with a reinforcing member for the opening / closing door.

[0006]

Therefore, in order to achieve the above object, an opening / closing door of a large engine working machine is constituted by the following means. A built-in component such as a large engine and a generator having a blower fan on a rotating shaft is provided, and the outside thereof is surrounded by a casing made of a soundproof wall, and an air suction hole for cooling is provided on the outer wall surface. In the large engine working machine that cools the internal mechanism by the operation of the above, at least the upper and lower ventilation holes having a plurality of air suction holes in the wall surface of the opening and closing door pivotally supported by the casing for checking the cooling oil of the engine oil and the like. A two-stage portion is provided, and an intake guide plate having an open top is fixedly provided for each of the vents inside the vent, and a plurality of reinforcing frames are provided as reinforcement frames for reinforcing the large opening / closing door formed of a single plate. The intake guide plate of the ventilation port is fixedly formed.

The ventilation opening of the door is formed in at least two steps, and the air intake hole of the ventilation hole is punched out of a steel plate of the door by a punch or the like. The above object can be achieved by reinforcing the strength of the door with the intake guide plate. In addition, the above-mentioned object is achieved by a structure in which outlets are provided on both sides of the intake guide plate and cooling air is directly blown to the heating engine, thereby increasing the cooling efficiency of the inside surrounded by the outer wall of the casing. it can. Further, since the opening / closing door of the present invention is large, the bottom surface of the intake guide plate of the ventilation hole formed in the upper and lower two stages is inclined lower toward the opening / closing door side, and the lower end of the inclination is several times lower than the lower edge of the ventilation opening. A step is provided so as to be a millimeter higher position, and the intake guide plate is fixed to the wall surface of the opening / closing door, and rainwater or the like that has entered from the air intake hole drips down along the intake guide plate surface and the lower end of the ventilation hole This can be achieved by a configuration in which the liquid flows out of the wall surface of the door.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The opening / closing door of a large engine working machine according to the present invention is formed from a single large steel plate, does not require vertical and horizontal reinforcing members on the back surface, and uses a simple method for air intake. The holes are formed by a number of punch holes.
Since the intake guide plate is formed as a reinforcing frame inside the vent, even if two or more vents are provided, the strength of the large-sized opening / closing door is maintained and the durability is excellent without bending or the like. Things. Moreover, the opening and closing door has a simple structure, and each intake outlet is open upward, so that cool air is blown out to the upper side, and the heated air in the large work machine is forced to flow downward. Excellent cooling efficiency due to convection effect. In addition, the intake guide plate fixed inside the opening and closing door has outlets not only above but also on both sides, so that the surface of the heating engine such as the engine can be cooled easily. It has excellent cooling efficiency for the engine and further strengthens the strength of the door. Further, the size of the opening / closing door is large, and the inflow of rainwater from the outside is increased by forming many vents. However, since the bottom surface of the intake guide plate is formed low on the outside, rainwater and the like easily flow out to the outside. So not only soundproofing measures,
Intrusion of rainwater from outside can be prevented.

An embodiment according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view of an embodiment showing the internal structure of a large engine working machine and an opening / closing door according to the present invention.
FIG. 2 is an enlarged sectional view of a vent of an opening / closing door used in the large engine working machine of the present invention. FIG. 3 is a perspective view of the large engine working machine of the present invention. FIG. 4 is the same schematic view as FIG. 1 in which an opening / closing door according to another embodiment of the present invention is provided.
FIG. 5 is an internal view of an essential part of the opening and closing door of the embodiment of FIG. FIG.
FIG. 3 is an enlarged sectional view of a vent of the opening and closing door of the present invention.

A door for a large engine working machine according to the present invention will be described. An engine 1 provided with an air filter 1a and the like is mounted, a generator 2 and the like for work are arranged, a blower fan 5 is fixed to a drive shaft 6 on a front surface of the engine 1, and a radiator 7 is provided on the blower side. Have been. These internal engines are surrounded by a soundproof casing 9 made of a wall material formed of a double structure, and an exhaust duct chamber 10 is arranged in a direction in which the radiator 7 of the casing 9 blows out. There is a window 10a. On both sides of the casing 9, large openable doors 11, 11... Made of a single steel plate are pivotally supported by hinges or the like. Each large openable door 11 has two vent holes 12, 11. 12 are drilled in two steps. The vent 12 is a large opening / closing door 1
A large number of air suction holes 13 are drilled in a predetermined size in one steel plate itself. For example, a 2.5 × 5 cm square hole is formed by punching according to the rules.

An intake guide plate 14 for guiding the intake air from the air intake hole 13 is disposed at an interval inside the ventilation opening 12 of the large-sized opening / closing door 11, and the intake guide plate 14 is opened only at the upper part. Is welded and fixed to the inner surface of the large opening / closing door 11. In particular, the bottom plate 14a provided at the lower end is inclined toward the large opening / closing door 11 side, and is extended to a position substantially equal in width to the ventilation opening 12 to a position higher than the lower end edge of the ventilation opening 12 of the large opening / closing door 11. The door 11 is fixed inside the ventilation port 12 by welding or the like, and a step is provided. The contact position of the bottom plate 14a with the inner surface of the large opening / closing door 11 is fixed at a position slightly higher than the lower end position of the ventilation port 12, for example, a step S of about 5 mm. The air vents 12 are provided at two levels above and below the large opening / closing door 11.

The operation of the large engine working machine according to the present invention will be described. The large door 11 is opened to change the oil of the engine 1 and to check the internal devices. The large door 11 is closed, and the operation switch is operated to start the engine 1.
With the start of the engine 1, the drive shaft 6 rotates and the blower fan 5 rotates to blow cooling air to the radiator 7 and exhaust the cooling air from the exhaust duct window 10 a to the outside of the casing 9. In this manner, the large opening / closing door 11 is configured as a guide plate for taking in cooling air which also serves as reinforcement. The flow of the air causes the air opening holes 13 of the large opening / closing doors 11, 11,.・ ・ Cooling air is taken in from. This cooling air is blown upward from the upper open portion along the inner surface of the intake guide plate 14, and is forcibly exhausted from the exhaust duct chamber 10 and the exhaust duct window 10a by the blower fan 5 while cooling each heat generating engine. An appropriate partition plate may be provided in the soundproof casing 9 to restrict the air passage. Since the fixing position of the vent 12 and the bottom plate 14a of the intake guide plate 14 is provided with a step S, rainwater or the like entering from the air intake hole 13 of the vent 12 falls along the inner surface of the intake guide plate 14. Since the water flows out from the air suction hole 13 at the lower end, it is possible to prevent rainwater from entering the inside.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A large-sized opening / closing door 11 according to another embodiment of the present invention is provided with a plurality of outlets 14b, 14b projecting from both sides of an intake guide plate 14, as shown in FIGS.
With such a structure, the suctioned cooling air is supplied to the upper open portion of the intake guide plate 14 and the outlet 14b from the side,
14b, the outlets 14b, 14b
Is provided so as to blow the heat generating portion of the internal engine, and the cooling air is blown directly to the heat generating portion, so that the cooling effect is excellent. Since the outlets 14b, 14b are extended and welded to both sides of the intake guide plate 14, the reinforcing effect on both sides of the large-sized opening and closing door 11 is excellent, and the reinforcing member of the steel plate of the large-sized large opening and closing door 11 is provided. ing.

[0014]

The opening and closing door of the large engine working machine according to the present invention is characterized in that the vertical and horizontal reinforcing members of a single steel plate are not fixed and the ventilation holes are formed in the steel plate by punching. It is formed by a simple structure, and the manufacturing process is improved. In addition, the cooling effect and the reinforcement of the large-sized door are excellent due to the intake guide plate fixed inside the plurality of ventilation holes for cooling and intake of the internal engine of the large-sized door.
In addition, since this intake guide plate is fixed and air outlets are also provided on the side, the vertical and horizontal reinforcement of the large opening and closing door is sufficiently performed, and the tip of this branch outlet is used as a heat generating part. It has excellent cooling effect because it is configured to face. At the time of operation of the engine, in the embodiment, the air is taken in from the four vents, so that the cool air required for cooling the internal large engine can be sufficiently taken in by the plural vents.

[Brief description of the drawings]

FIG. 1 is a schematic view of an embodiment showing an internal structure of a large engine working machine of the present invention and an opening / closing door attached thereto.

FIG. 2 is an enlarged sectional view of a vent of an opening / closing door used in the working machine of the present invention.

FIG. 3 is a perspective view of the large engine working machine of the present invention.

FIG. 4 is a schematic view illustrating a door provided with another embodiment of the present invention.

FIG. 5 is an internal view of a main part of the opening / closing door of the embodiment in FIG. 4;

FIG. 6 is a partially enlarged sectional view of a vent of the opening / closing door of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Engine 2 ... Generator 3 ... Rectifier 5 ... Blower fan 6 ... Drive shaft 7 ... Radiator 9 ... Casing 10 ... Exhaust duct room 11 ... Large open / close door 12 ... Vent 13 ... Air intake hole 14 ... Intake guide plate

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI F16M 1/00 F16M 1/00 G

Claims (5)

(57) [Claims] An internal component such as a large engine and a generator having a blower fan on a rotating shaft is provided, and the outside thereof is surrounded by a casing made of a soundproof wall, and a cooling air intake hole is provided on the outer wall surface. A large engine working machine for cooling an internal mechanism by the operation of the blower fan, wherein a plurality of air suction holes are provided on a wall surface of an inspection opening / closing door pivotally supported by the casing, such as engine cooling oil cooling water. A reinforcing frame for reinforcing the large opening / closing door made of a single plate by providing at least two stages of upper and lower openings, and an intake guide plate having an open top fixed to each of the ventilation holes inside the ventilation holes. An opening / closing door for a large engine working machine, wherein a plurality of intake guide plates of ventilation holes are fixedly formed. 2. The door for a large engine working machine according to claim 1, wherein an air intake hole of an air vent is punched out of a steel plate of the door by a punch or the like. 3. A plurality of intake guide ducts are arranged on both sides of the intake guide plate without opening only the intake guide plate provided inside the ventilation port, thereby reinforcing the door. 3. The opening / closing door for a large engine working machine according to claim 1, wherein the cooling operation of the internal engine is performed and the cooling efficiency of the internal engine is increased. 4. A front end portion of each of said ducts is disposed close to said heat generating portion such that cooling air is forcibly blown to a heat generating portion of an engine, a generator or the like. Item 4. An opening / closing door for a large engine working machine according to item 1, 2 or 3. 5. A bottom surface of the intake guide plate is inclined toward the opening / closing door, and the intake guide plate is fixed to an inner wall surface of the opening / closing door so that a step is formed between a lower end of the inclined surface and a lower end edge of the ventilation port. The rainwater or the like that has entered through the air suction hole flows down along the intake guide plate surface and flows out of the wall surface of the door through the lower end of the ventilation hole. An open / close door for a large engine working machine according to 2, 3 or 4.