JP6055303B2 - Soundproof box for engine-driven work equipment - Google Patents

Description

  The present invention relates to a soundproof box for an engine-driven work machine, and more specifically, an engine that is a component of the engine-driven work machine, a work machine body such as a compressor or a generator driven by the engine, and other components. The present invention relates to a soundproof box for an engine-driven work machine having a feature in the structure of an intake port portion that is an intake port for cooling air to the inside of the soundproof box.

  In an engine-driven work machine equipped with an engine and a work machine body driven by the engine, such as a compressor body or a generator body, a soundproof box, such as a steel plate box, is attached to the inner wall with a sound absorbing material or the like. It is a common practice to accommodate so-called “soundproof working machines” by accommodating the components.

  In such a soundproof type work machine, a cooling fan is housed in the soundproof box in order to cool components such as the engine and work machine main body housed in the soundproof box, and an intake port is provided on the wall of the soundproof box. When the cooling fan is rotated to generate a flow of cooling air in the soundproof box, the outside air is sucked into the soundproof box through the intake port and the inside of the soundproof box is cooled. The cooled air can be discharged out of the soundproof box through the exhaust port.

  In such a soundproof box of an engine-driven work machine, rainwater, dust, etc. are prevented from being sucked into the above-mentioned intake port together with outside air, and noise generated by the engine etc. leaks directly out of the soundproof box. In order to prevent this, and to reinforce the wall surface whose rigidity has been reduced by providing the air intake, a guide body 120 facing the air intake is attached inside the soundproof box, so that the guide 120 and the soundproof box are attached. The guide body 120 serves as a baffle plate while securing the suction flow path 125 communicating with the suction port 160 between the wall surface 150 and the wall, so that suction of rainwater and dust and direct leakage of noise are prevented. At the same time, it is also proposed to reinforce the wall surface 150 in the portion where the air inlet 160 is formed by attaching the guide body 120.

  As shown in FIG. 8, the guide body 120 has a guide plate 121 facing the side surface 150 where the air inlet 160 is formed inside the soundproof box, and the air inlet 160 side from the bottom of the guide plate 121. And a side plate 123 projecting from both sides of the guide plate 121 in the width direction, and the bottom plate 122 of the guide body 120 is connected to the wall surface of the soundproof box at the lower edge of the intake port 160. 150, the side plate 123 is fixed to the wall 150 of the soundproof box at both edges in the width direction of the air intake 160, and the air intake 160 is covered inside the soundproof box by the guide body 120. It has been proposed to form an air intake passage 125 between the wall surfaces 150 of the sound box to deflect the air flow introduced through the intake port 160 upward.

  In the configuration in which the guide body 120 is attached to the inside of the formation position of the intake port 160, as shown in FIG. 9, the structure of the intake portion formed on the open / close door of a large engine-driven work machine is further provided. , A plurality of at least two-stage air intakes 160, 160 are provided on the wall surface 150 of the opening / closing door of the soundproof box, and the air intakes 160, 160 inside the soundproof box are described with reference to FIG. It has also been proposed that the guide bodies 120 and 120 having the same structure are fixed and the guide bodies 120 and 120 function as a reinforcing frame for reinforcing a large opening / closing door made of a single plate (Patent Document 1).

JP-A-9-203326

  When trying to improve the cooling efficiency of equipment housed in a soundproof work machine, the countermeasure is to increase the amount of intake air introduced into the soundproof box. In order to obtain the above, generally, the opening area of the intake port and the flow passage area of the suction flow passage are increased.

  However, if the opening area of the air inlet is increased in this way, the rigidity of the wall surface provided with the air inlet will be reduced, especially for the open / close door that opens and closes the inspection window formed on the side of the soundproof box. When the air inlet is formed, if the door is deformed or distorted due to a decrease in rigidity due to the air inlet, the door itself is hindered.

  On the other hand, as introduced as Patent Document 1, it has been proposed to maintain the strength by forming the intake ports in two upper and lower stages and attaching and reinforcing the above-described guide bodies respectively.

  In the above configuration, the intake port is divided into two stages, upper and lower, to secure the opening area of the entire intake port while maintaining the rigidity by reducing the opening area of each individual intake port. Even if such a structure is adopted, it is still possible to increase the opening area of each intake port divided into two upper and lower stages to improve the cooling efficiency. It cannot be avoided that the rigidity of the door is lowered.

  Therefore, the present invention has been made to eliminate the above-mentioned drawbacks of the prior art, and by devising the structure of the intake port provided in the soundproof box of the engine-driven work machine, the present invention can be applied to a large intake port, particularly an open / close door. On the other hand, even when a large intake port is formed to increase the intake air volume, the required strength can be maintained, so that the cooling efficiency and the soundproof wall of the soundproof box are increased as the intake air volume increases. It is an object of the present invention to provide a soundproof box for an engine-driven work machine that can achieve both maintenance of rigidity.

  Hereinafter, means for solving the problem will be described together with reference numerals used in the embodiment for carrying out the invention. This code is used to clarify the correspondence between the description of the scope of claims and the description of the mode for carrying out the invention. Needless to say, this code is limited to the interpretation of the technical scope of the present invention. Not used.

In order to achieve the above object, the soundproof box 10 of the engine-driven work machine 1 according to the present invention accommodates the components of the engine-driven work machine 1 and includes an inlet 16 for introducing cooling air into the internal space. , And a side wall (in the embodiment shown in FIG. 1 to FIG. 3 in the longitudinal direction of the soundproof box 10) provided with an exhaust port 17 for discharging the cooling air after being used for cooling to the outside of the machine. sidewall 13c, the inner surface of the door 15, 15) constituting a part of the 13d, the intake air flow of the air introduced through the inlet port 16 I covering the inlet port 16 to deflect upwardly A soundproof box of an engine-driven working machine to which a guide body 20 forming the flow path 25 is attached,
The guide body 20 is
A counter plate 211 disposed opposite to the inner wall of the soundproof box and having an upper side extending beyond the upper edge of the air inlet, and a lower side of the lower edge of the air inlet 16 protruding from the lower side of the counter plate 211 The bottom plate 212 fixed to the inner wall of the soundproof box 10 and the side plate 213 that protrudes from the sides of the opposing plate 211 and is fixed to the inner wall of the soundproof box 10 outside the both side edges in the longitudinal direction of the intake port 16. , 213, a guide body main body 21 facing the entire surface of the intake port 16, and
The guide body main body 21 is interposed between the opposing plate 211 and the intake port 16, and has an upper side extending beyond the upper edge of the intake port 16 and a side side of the guide body main body 21. One of the intake ports 16 includes an intermediate facing plate 221 fixed to the side plate 213 and an intermediate bottom plate 222 projecting from the lower side of the intermediate facing plate 221 toward the lower edge and the upper edge of the intake port 16. An intermediate guide 22 facing the section;
The intake air passage formed between the counter plate 211 and the intermediate counter plate 221 by connecting the counter plate 211 of the guide body 21 and the intermediate counter plate 221 of the intermediate guide 22. 25. A connecting body (23 or 23 ′) that divides 25 into at least two in the longitudinal direction of the intake port 16 is provided (claim 1).

  In the soundproof box 10 of the engine-driven work machine 1 having the above-described configuration, the guide body 20 may include a plurality of the intermediate guide bodies 22 and 22 '(see claim 2 and FIG. 5).

Furthermore, in the soundproof box 10 of the engine-driven work machine 1 having the above-described configuration, the opposed plate 211 of the guide body 21 is provided with a notch 27 opened on the upper side of the opposed plate 211,
The connecting body 23 'is provided with two side walls 232 and 232 having a height direction as a length direction, and a bottom wall 233 having both longitudinal ends connected between the lower sides of the two side walls 232 and 232. ,
One end in the width direction of the two side walls 232 and 232 and the bottom wall 233 is connected to the counter plate 211 at the peripheral edge of the notch 27 and the other end is connected to the intermediate counter plate 221 of the intermediate guide 22. It is good also as a structure connected to (refer Claim 3, FIG. 6).

  In this case, it is preferable that the bottom wall 233 of the connecting body 23 ′ has a shape in which an intermediate position in the longitudinal direction such as a U-shape or a V-shape bulges or protrudes downward. FIG. 7B and FIG. 7C].

  According to the configuration of the present invention described above, in the soundproof box 10 of the engine-driven work machine 1 of the present invention, the guide body 20 having the above-described structure itself has a high rigidity, and such a high rigidity. By attaching the guide body 20, even when the intake port 16 having a relatively large area is provided, the strength of the wall surface provided with the intake port 16 can be maintained. Even when the doors 15 and 15 for opening and closing the inspection windows provided on the side surfaces of the doors 15 and 15 are formed, it is possible to suitably prevent the opening and closing doors 15 and 15 from being distorted or deformed.

  In the configuration in which the above-described guide body 20 is provided with a plurality of intermediate guide bodies 22 and 22 ', the rigidity of the guide body 20 can be further increased by the intermediate guide bodies 22 and 22' serving as a reinforcement. The strength of the wall surface of the soundproof box 10 can be further increased by attaching the guide body 20 to the inner wall of the soundproof box 10 at the position where the intake port 16 is formed.

  The aforementioned opposing plate 211 of the guide body 21 is provided with a notch 27 opened at the upper side of the opposing plate 211, and the side wall 232 connected to the opposing plate 211 at the peripheral edge of the notch 27 on the connecting body 23 ′. , 232 and the bottom wall 233, the recess 26 surrounded by the side walls 232, 232 and the bottom wall 233 of the coupling body 23 ′ can be formed in the cutout 27. By forming this recess 26, the engine 30, etc. By avoiding interference with parts of the storage device (for example, the turbocharger 32 and the intake pipe 33), a relatively large intake passage 25 is secured in the guide body 20, and the storage device such as the engine 30 is secured. Interference could be avoided.

  In addition, by forming the bottom wall 233 of the connecting body 23 'into a shape in which an intermediate position in the longitudinal direction bulges or protrudes downward, such as a U-shape or a V-shape, the guide body 20 The resistance given by the connecting body 23 ′ to the cooling air flowing through the formed flow path 25 can be reduced, and the cooling air can be smoothly introduced.

The side view of an engine drive type working machine. II-II sectional view taken on the line of FIG. III-III sectional view taken on the line of FIG. The perspective view of the guide body seen from the inside of a soundproof box. The perspective view of the guide body provided with the some intermediate | middle guide body seen from the inner side of the soundproof box. It is the perspective view of the guide body provided with the recessed part seen from the inner side of a soundproof box, (A) is a completion figure, (B) is the exploded view of the state which removed the connection body 23 '. It is a perspective view which shows the modification of a coupling body, (A) is what omitted the back plate, (B) is equipped with a U-shaped bottom plate, (C) is equipped with a V-shaped bottom plate . Explanatory drawing of the air inlet part of the soundproof box of the conventional engine drive type work machine. Explanatory drawing of the inlet (multistage structure) part in the soundproof box of the engine drive type working machine of patent document 1. FIG.

  Next, embodiments of the present invention will be described with reference to the accompanying drawings.

  As shown in FIGS. 1 to 3, the soundproof box 10 of the engine-driven work machine 1 includes a frame 11 that forms a bottom surface of the soundproof box 10 and is formed in a substantially rectangular shape in plan view, and on each side of the frame 11. The bonnet 12 is composed of four side walls 13a to 13d erected on the top and the top plate 14 covering the upper portions of the side walls 13a to 13d. By covering the housing equipment such as the machine main body 40 from above with the bonnet 12, the operation sound of the engine 30 and the work machine main body 40 can be reduced by the soundproof box 10, and the housing equipment is directly exposed to wind and rain. Is prevented.

  In the illustrated engine-driven work machine 1, the interior space of the soundproof box 10 constituted by the frame 11 and the bonnet 12 is partitioned into two chambers by a partition plate 18 as shown in FIG. One space in the soundproof box 10 partitioned by 18 is a space for housing the engine 30 and the work machine main body 40 connected to the output shaft of the engine 30, and in the illustrated embodiment, the compressor main body (hereinafter referred to as “the compressor main body”). The other space is a radiator 34 and an oil cooler 35, and when the engine is equipped with a supercharger such as a turbocharger 32 or a supercharger, an intercooler 36 or the like is used to drive the engine. It is formed as a space (hereinafter referred to as “cooling chamber 10 b”) for accommodating a heat exchanger provided in the mold work machine 1.

  The partition plate 18 is provided with an opening (not shown) in the center thereof, and the engine chamber 10a and the cooling chamber 10b communicate with each other through the opening and are provided in the engine 30. A cooling fan 31 is arranged in the engine chamber 10a so as to generate a flow of cooling air toward the opening of the partition plate 18.

  Therefore, when the cooling fan 31 is rotated by starting the engine 30, a cooling air flow from the engine chamber 10 a toward the cooling chamber 10 b is generated through the opening provided in the partition plate 18, and faces the opening provided in the partition plate 18. Thus, the cooling air can be introduced into a heat exchanger such as the radiator 34, the oil cooler 35, and the intercooler 36 disposed in the cooling chamber 10b.

  In the illustrated embodiment, the cooling fan 31 is attached to one end of the output shaft of the engine 30 so as to rotate as the engine 30 rotates. However, the cooling fan 31 rotates with the engine 30. Alternatively, a motor for the cooling fan 31 may be provided and rotated by this.

  In order to introduce cooling air into the soundproof box 10 by the rotation of the cooling fan 31 and to discharge the cooling air after cooling the inside of the soundproof box 10 to the outside of the soundproof box 10, The above-described bonnet 12 includes an intake port 16 for introducing cooling air into the soundproof box 10 and an exhaust port 17 for discharging the cooling air after being used for heat exchange to the outside of the soundproof box 10. Is provided.

  In the intake port 16 and the exhaust port 17, the cooling air introduced into the soundproof box 10 from the intake port 16 is accommodated in the engine 30 and work implement main body 40 accommodated in the engine chamber 10 a and the cooling chamber 10 b. After cooling the heat exchanger such as the radiator 34, the oil cooler 35, the intercooler 36, etc., the above-described intake port 16 is connected to the engine chamber 10a portion so that the air can be exhausted to the outside through the above-described exhaust port 17. While forming in the bonnet 12, the exhaust port 17 is formed in the bonnet 12 of the cooling chamber 10b part.

  In the present embodiment, as shown in FIG. 2, all or a part of the side wall 13c, 13d that forms the longitudinal direction of the soundproof box 10 corresponding to the engine compartment 10a (part in the example of FIG. 2). Is constituted by the doors 15 and 15, and the side walls 13 c and 13 d in the longitudinal direction of the soundproof box 10 can be opened by the doors 15 and 15, thereby facilitating maintenance and inspection work of the equipment accommodated in the soundproof box 10. The opening and closing doors 15 and 15 are provided with the above-described intake port 16.

  In addition, an exhaust port 17 is formed in the top plate 14 of the cooling chamber 10b described above so that the cooling air after being used for cooling in the soundproof box 10 can be exhausted outside the soundproof box 10.

  In the present embodiment, the above-described open / close doors 15 and 15 are connected at one end to the edge of the top plate 14 by hinges (not shown), and the hinged one side is perpendicular to the rotation center. Opening and closing operations are possible by rotating in the direction.

  In the present embodiment, the opening / closing doors 15 and 15 are formed in a relatively large size and the above-described intake port 16 is provided in this portion, so that the intake port 16 is arranged in the longitudinal direction of the soundproof box 10 as shown in FIGS. As a result, as shown by a broken arrow in FIG. 2, any part in the longitudinal direction of the engine 30 can be provided via the intake port 16. The engine 30 can be suitably cooled by introducing the introduced relatively cool outside air.

  In this way, by forming the intake port 16 having a large opening area on the side walls 13c and 13d, the amount of intake cooling air can be increased, and thus the cooling efficiency can be improved, but the formed intake port 16 should be made larger. As a result, the rigidity of the side walls 13c, 13d (open / close doors 15, 15 in the embodiment) decreases.

  Therefore, in order to compensate for the strength of the side walls 13c and 13d (opening and closing doors 15 and 15) whose rigidity has been reduced due to the formation of the air intake port 16, the soundproof box 10 of the present invention has the intake port 16 inside the soundproof box 10. By attaching the guide body 20 to the formation position, the side walls 13c and 13d (opening and closing doors 15 and 15) are reinforced.

  In the description of the present embodiment, a configuration in which a part of the side walls 13c and 13d is configured by the open / close doors 15 and 15 and the intake port 16 is formed in the open / close door 15 and the guide body 20 is attached will be described. However, the intake port 16 and the guide body 20 are not necessarily provided in the open / close door 15.

  As shown in FIGS. 4 to 6, the guide body 20 includes a guide body main body 21 that is attached to the inner surface of the opening / closing door 15 so as to cover the intake port 16, and a space between the guide body main body 21 and the inner surfaces of the opening / closing door 15. And an intermediate guide body 22 interposed between the guide body main body 21 and the intermediate guide body 22 (23 or 23 ').

  The aforementioned guide body main body 21, intermediate guide body 22, and connecting body (23 or 23 ') are all formed by bending a metal plate or the like into a predetermined shape. When mounted on the inner surface of the open / close door 15, the counter plate 211 is disposed opposite to the inner surface of the open / close door 15 so as to face the intake port 16 and the upper side is disposed above the upper edge of the intake port 16. The bottom plate 212 that protrudes from the lower side of the opposing plate 211 and is fixed to the inner surface of the door 15 below the lower side of the intake port 16 and the longitudinal direction of the intake port 16 that protrudes from the side of the opposing plate. Side plates 213 that are fixed to the inner surface of the open / close door 15 on the outer side of both side edges.

  The intermediate guide body 22 is interposed between the opposing plate 211 of the guide body main body 21 and the air intake port 16 so as to face a part of the air intake port 16, and the upper edge of the air intake port 16 is formed. An intermediate counter plate 221 whose upper side extends and the side is fixed to the side wall 213 of the guide body 21, and between the lower edge and the upper edge of the intake port 16 from the lower side of the intermediate counter plate 221 And an intermediate bottom plate 222 protruding toward the bottom.

  Furthermore, in the embodiment shown in FIG. 4, the connecting body 23 described above has a flange 234 formed by bending two sides of a metal rectangular plate with a predetermined width, and has a U-shaped cross section in the width direction. It arrange | positions between the opposing board 211 of the guide body main body 21, and the intermediate | middle opposing board 221 of the intermediate guide body 22, and connects both.

  In the illustrated embodiment, a flange serving as a fixing margin is formed by bending a side of the intermediate facing plate 221 and a side of the intermediate bottom plate 222 of the intermediate guide 22 with a predetermined width. The side plate 213 of the guide body 21 is fixed with the tapping screw 28, and the flange 234, the opposing plate 211 and the intermediate opposing plate 221 provided on the connecting body 23 are similarly used with a tapping screw (not shown) or the like. In addition to fixing each member, a flange serving as a fixing margin is similarly provided at a joint portion between the side plate 213 of the guide body 21 and the inner surface of the open / close door 15 of the bottom plate 212, and a screw hole ( (Not shown) and a stud bolt 29a fixed to the inner surface of the door 15 is inserted into the screw hole, and a nut 29b is screwed onto the tip of the stud bolt 29a. , Attach the guide member 20 against the inner surface of the door 15.

  The fixing between the components of the guide body 20 and the fixing of the guide body 20 to the inner surface of the open / close door 15 may be performed by a method such as welding instead of the above-described tapping screw or mounting with a bolt and a nut. It is also possible to use a combination of fixing with a tapping screw or bolt and nut and welding.

  As described above, the guide body 20 including the guide body main body 21 and the intermediate guide body 22 and connecting the guide body main body 21 and the intermediate guide body 22 by the connecting body 23 has high rigidity in itself. As a result, the guide body 20 is attached to the inner surface of the open / close door 15 at the position where the intake port 16 is formed, so that the rigidity of the open / close door 15 can be achieved even when the open / close door 15 has a relatively large area of the intake port 16. Can be prevented from decreasing.

  In the example shown in FIG. 4, by connecting the counter plate 211 and the intermediate counter plate 221 with one connector 23, the flow path 25 between the counter plate 211 and the intermediate counter plate 221 is set to 2 in the longitudinal direction. Although an example of a divided configuration is shown, although not shown in the drawing, a further improvement in strength can be achieved by providing a plurality of the above-described connecting bodies 23 and connecting the counter plate 211 and the intermediate counter plate 221 at a plurality of locations. It may be designed.

  As described above, in the embodiment described with reference to FIG. 4, the guide body 20 including the single intermediate guide body 22 has been described. However, the guide body 20 includes a plurality of intermediate guide bodies 22 as illustrated in FIG. 5. , 22 'may be provided.

  In the example shown in FIG. 5, the example in which the two intermediate guide bodies 22 and 22 ′ are provided is shown. However, in the large guide body 20, two or more intermediate guide bodies may be provided.

  In the example shown in FIG. 5, the connecting body 23 is provided only between the counter plate 211 of the guide body main body 21 and the intermediate counter plate 221 adjacent to the counter plate 211. A connection body (not shown) that connects the plate 221 'may be provided to further improve the rigidity.

  In the guide body 20 shown in FIG. 5 as well, as described with reference to FIG. 4, a plurality of connecting bodies 23 are provided, and the interval between the opposing plate 211 and the intermediate opposing plate 221 is 3 in the longitudinal direction. It may be divided into more than the number of divisions. Also, when a connecting body (not shown) is provided between the intermediate facing plate 221 and the intermediate facing plate 221 ′, a plurality of connecting bodies may be provided.

  In the guide body 20 described with reference to FIGS. 4 and 5, the connecting body 23 is simply provided as a member for connecting the counter plate 211 and the intermediate counter plate 221, but the embodiment shown in FIG. In this case, not only a function as a reinforcing material for connecting the counter plate 211 and the intermediate counter plate 221 to the connecting body 23 ′ but also a recess 26 for avoiding interference with the accommodation device is formed on the guide body 20. It has a function as a member for doing this.

  In order to form such a recess 26, in the embodiment shown in FIGS. 6A and 6B, the counter plate 211 of the guide body 21 is opened to the counter plate 211 at the upper side of the counter plate 211. In addition, a cutout 27, an upward U-shaped cutout is provided in the illustrated example, and the connecting body 23 'is formed between two side walls 232 and 232 having a height direction as a length direction and a lower side of the side walls 232 and 232 Are provided with a bottom wall 233 (see FIG. 6B).

  Then, when one end in the width direction of the side walls 232 and 232 and the bottom wall 233 of the connecting body 23 ′ is connected to the counter plate 211 at the peripheral edge of the notch 27 provided in the counter plate 211, the other end in the width direction is intermediate. A concave portion 26 is formed in a portion connected to the opposing plate 221 and surrounded by the side walls 232 and 232 and the bottom wall 233 in the notch 27.

  In the embodiment shown in FIGS. 6A and 6B, the side wall 232 is projected from both ends in the width direction of the back plate 231 disposed in contact with the intermediate opposing plate 221. The bottom wall 233 protrudes from the bottom of the back plate 231 and is fixed to the intermediate counter plate 221 with the tapping screw 28 in a state where the back plate 231 is in contact with the intermediate counter plate 221. However, instead of this configuration, for example, as shown in FIG. 7A, instead of the back plate 231, a flange 235 is provided on one side in the width direction of the side wall 232 and the bottom wall 233, and this portion is attached to the tapping screw. It is good also as what fixes to the intermediate | middle opposing board 221 using 28 grade | etc.,.

  As shown in FIGS. 2 and 3, when a turbocharger 32 or the like is provided in the engine 30 of the engine-driven work machine 1, the supercharger or the intake air compressed by the supercharger is intercooled. A pipe (intake pipe 33) for introducing the intake air cooled by the intercooler 36 into the intake port of the engine 30 protrudes from the main body portion of the engine 30 toward the inner surface side of the side wall 13 d of the soundproof box 10. May be established.

  Therefore, if the distance d (refer FIG. 3) between the opposing board 211 of the guide body 20 and the inner surface of the opening-and-closing door 15 is taken large, the opposing board 211 will interfere with these apparatuses.

  In this case, the distance d between the opposing plate 211 and the inner surface of the open / close door 15 is shortened as a whole to avoid interference, or to prevent the interference from occurring, the guide body 20 is set to the length of the soundproof box 10. It is conceivable to install the apparatus such as the intake pipe 33 between the divided guide body and the guide body, but in this case, the flow of the intake air formed in the guide body 20 may be considered. The passage 25 is narrowed, and the intake efficiency, and hence the cooling efficiency is deteriorated.

  On the other hand, in the case where the concave portion 26 is provided only in a part of the guide body 20 as described above, the accommodation device is not reduced without significantly reducing the flow area of the flow path 25 formed in the guide body 20. It is possible to avoid interference with the.

  Further, by configuring the connecting body 23 'to have the above-described structure, when the guide body 20 is assembled, the opposing plate 211 of the guide body main body 21 is disposed horizontally, and the notch 27 formed in the opposing plate 211 is formed. The guide body main body 21 and the intermediate guide body are attached by attaching the connecting body 23 ′ in alignment with the position, and attaching the intermediate guide body 22 so that the intermediate counter plate 221 contacts the connecting body 23 ′. Positioning with 22 is easy, and it is not necessary to separately prepare a jig or the like for regulating the distance between the two during assembly.

  In the embodiment described with reference to FIGS. 6 (A), 6 (B) and 7 (A), a configuration example in which the bottom wall 233 of the connecting body 23 ′ is arranged in the horizontal direction is shown. However, preferably, as shown in FIG. 7B, the bottom wall 233 is curved in a U shape so as to bulge downward, or as shown in FIG. The bottom wall 233 has a shape in which the middle position in the longitudinal direction bulges or protrudes downward, such as being formed in a V shape having the center in the longitudinal direction as a vertex.

  In this case, the shape of the notch 27 formed in the counter plate 211 of the guide body 21 is also formed in a shape corresponding to this.

  With this configuration, even when the connecting body 23 ′ shown in FIGS. 7B and 7C, which is larger than the connecting body 23 shown in FIG. The resistance given to the intake air flowing in the formed flow path 25 can be reduced.

  Even in a configuration in which a recess 26 for avoiding interference with the accommodation device is provided in a part of the guide body 20, a highly rigid guide body 20 can be obtained. Even if the opening / closing door 15 is formed with a relatively large intake port 16, deformation and distortion can be suitably prevented.

  In the above description, the operation of the soundproof box 10 of the present invention has been described focusing on the reinforcement of the opening / closing door 15, but the guide body 20 having the above-described configuration is used as the inner surface of the soundproof box 10 at the position where the intake port 16 is formed. As in the case of the guide body described as the prior art, it is possible to block the intrusion of rainwater and dust into the soundproof box 10, and the noise generated in the engine and work implement main body can be directly removed from the machine via the intake port. Needless to say, leakage can be prevented.

DESCRIPTION OF SYMBOLS 1 Engine drive type work machine 10 Soundproof box 10a Engine room 10b Cooling room 11 Frame 12 Bonnet 13 (13a-13d) Side wall 14 Top plate 15 Opening / closing door 16 Intake port 17 Exhaust port 18 Partition plate 20 Guide body 21 Guide body main body 211 Opposite Plate 212 Bottom plate 213 Side plate 22, 22 ′ Intermediate guide 221 Intermediate counter plate 222 Intermediate bottom plate 23, 23 ′ Connection body 231 Back plate 232 Side wall 233 Bottom wall 234, 235 Flange 25 Flow path (for intake air)
26 Recess 27 Notch 28 Tapping screw 29a Stud bolt 29b Nut 30 Engine 31 Cooling fan 32 Turbocharger (turbocharger)
33 Intake pipe 34 Radiator 35 Oil cooler 36 Intercooler 40 Work machine main body (compressor main body)
120 Guide body 121 Guide plate 122 Bottom plate 123 Side plate 125 Suction flow path 150 Wall surface (of soundproof box)
160 Inlet

Claims (4)

An intake port for housing the components of the engine-driven work machine and introducing cooling air into the internal space; and an exhaust port for discharging the cooling air after being used for cooling to the outside of the machine. engine driving but the inner surface of the formed side wall, fitted with a guide member for forming a flow path of intake air deflected toward the flow of air introduced through the inlet port I covering the air inlet upwardly A soundproof box of a type work machine,
The guide body is
A counter plate which is disposed opposite to the inner wall of the soundproof box and has an upper side extending beyond the upper edge of the air intake port, and protrudes from the lower side of the counter plate and below the lower edge of the air intake port. A guide body facing the entire surface of the air intake port, comprising a bottom plate fixed to the inner wall and a side plate protruding from the side of the opposing plate and fixed to the inner wall of the soundproof box outside the side edge of the air intake port The body,
The guide body is interposed between the opposing plate and the intake port, the upper side extends beyond the upper edge of the intake port, and the side is fixed to the side plate of the guide body. An intermediate guide plate facing a part of the intake port, comprising an intermediate counter plate, and an intermediate bottom plate protruding from the lower side of the intermediate counter plate toward the lower and upper edges of the intake port;
The counter plate of the guide body main body and the intermediate counter plate of the intermediate guide member are connected to each other, and the intake air flow path formed between the counter plate and the intermediate counter plate is formed in the longitudinal direction of the intake port. A soundproof box for an engine-driven work machine, comprising a connecting body that is divided into at least two in a direction.   The soundproof box for an engine-driven work machine according to claim 1, wherein the guide body includes a plurality of intermediate guide bodies. The opposing plate of the guide body is provided with a notch opened at the upper side of the opposing plate,
The connecting body is provided with two side walls whose length direction is the height direction, and a bottom wall having both longitudinal ends connected between the lower sides of the two side walls,
One end in the width direction of the two side walls and the bottom wall is connected to the counter plate at the peripheral edge of the notch, and the other end is connected to the intermediate counter plate of the intermediate guide body. A soundproof box for an engine-driven work machine according to claim 1 or 2.   4. A soundproof box for an engine-driven work machine according to claim 3, wherein the bottom wall of the coupling body has a shape in which an intermediate position in the longitudinal direction bulges or protrudes downward.

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