Soundproof box for engine-driven work equipment

Abstract

To improve attachability and waterproofness of a component attachment plate which covers a base in an exhaust chamber.SOLUTION: Lengths l of a first side 40a and a second side 40b, disposed in a width direction of a base 10, of sides 40a to 40d of a component attachment plate 40, which closes an upper opening of the base 10 at a formation position of an exhaust chamber 30b and has a rectangular shape in a plan view, are formed longer than a distance Win between inner surfaces of two side walls 12 forming a longitudinal direction of the base 10. The component attachment plate 40 is attached to the base 10 in a state that a bottom surface of the component attachment plate 40 is placed on upper end edges of the side walls 13a, 13a as seen in the longitudinal direction of the base 10 and an upper end edge of one side wall 13b as seen in the width direction.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a soundproof box for engine-driven working machines such as compressors and generators, and more specifically, to a soundproof box for engine-driven working machines that has a distinctive structure in the base on which the component equipment is placed. [Background technology]

[0002] Engine-driven work machines such as compressors and generators are usually constructed as packaged soundproof work machines, with the engine, work machine body, and other components housed in a soundproof box to prevent noise from escaping outside the machine during operation and to make transportation and installation easier.

[0003] An example of the construction of a soundproof box 1 for such a soundproof working machine is shown in Figs.

[0004] The soundproof box 1 shown in Figures 7 to 9 is composed of a base 10 that is rectangular in plan view on which components of an engine-driven work machine, such as an engine 50 and a work machine body (generator body in the illustrated example) 70, are placed, and a soundproof case 30 that covers the base 10 with the components placed on it.

[0005] Of these, the base 10 is formed, for example, by welding or otherwise connecting four channel materials 11 with a U-shaped cross section so as to form a rectangular frame when viewed in a plane, and the web portions of the channel materials 11 form the side walls 13 of the base 10, while a flange 11a of the channel materials 11 protruding outward from the upper edge of the base 10 forms a bracket 21 for placing and fixing the lower edge of the soundproof case 30.

[0006] On the other hand, the aforementioned soundproof case 30 is a box-shaped case consisting of a front panel 31, a rear panel 32, a side panel 33, and a top panel 34, and in the example shown in Figure 7, it is provided with a window 35 created by opening a part of the side panel 33, and a door 36 for opening and closing this window 35, so that maintenance, inspection, etc. of the equipment housed inside can be performed.

[0007] In such a soundproof box 1 for an engine-driven work machine, it has also been proposed that the aforementioned base 10 be given the function of an oil barrier to prevent fuel, lubricating oil, etc. leaking from the contained equipment such as the engine 50 or the work machine main body 70 from leaking outside the machine.

[0008] As an example, in the soundproof box described in Patent Document 1 below, a box-shaped oil storage tank 17 with an upward opening is housed within the aforementioned base 10 (see Figure 8), and leaked oil can be stored within this oil storage tank 17, giving the base 10 the function of an oil barrier.

[0009] In this way, in a soundproof box 1 in which the base 10 functions as an oil barrier, if rainwater accumulates in the oil storage tank 17, the accumulated rainwater will mix with the leaked oil in the oil storage tank 17 and become contaminated, making it impossible to treat as wastewater, which will result in disposal costs being incurred to dispose of the accumulated rainwater.

[0010] Furthermore, if rainwater accumulates in the oil storage tank 17, in the event of a leak of fuel, lubricating oil, etc., the oil storage tank 17 will not have the capacity to accommodate the leaked oil, and the leaked oil may overflow from the oil storage tank 17 and pollute the surrounding environment.

[0011] Therefore, in the case of a soundproof box 1 in which an oil storage tank 17 is provided as described above and the base 10 functions as an oil barrier, it is necessary to adopt a structure that prevents rainwater from entering the oil storage tank 17.

[0012] Here, the soundproof box 1 of the engine-driven work machine has a configuration in which the space inside the soundproof cover 30 is divided into two chambers, at the front and rear of the soundproof box 1 in the longitudinal direction, by a vertically erected partition wall 37, as shown in Figure 8, and one of these chambers is the engine chamber 30a which houses the engine 50 and the work machine main body (generator main body) 70, while the other chamber is the exhaust chamber 30b which opens to the outside of the machine through an exhaust port 38 (see Figure 7) provided in the top panel 34.

[0013] The engine compartment 30a and the exhaust chamber 30b are connected through a communication port (not shown) provided in the central part of the partition wall 37, and a heat exchanger 51 consisting of a radiator for the engine 50 or, if the engine is equipped with a turbocharger, an intercooler for the turbocharger, etc. is arranged facing this communication port, and a cooling fan 53 is provided to introduce cooling air into the heat exchanger 51, and this cooling fan 53 generates cooling air flowing from the engine compartment 30a to the exhaust chamber 30b, so that the cooling air after heat exchange is introduced into the exhaust chamber 30b and can be discharged outside the aircraft through the exhaust port 38 provided in the top panel 34 of the exhaust chamber 30b.

[0014] Due to the configuration of this type of packaged engine-driven working machine, when this engine-driven working machine is used outdoors, rainwater will enter the exhaust chamber 30b through the exhaust port 38 provided in the top panel 34.

[0015] Therefore, in the soundproof box 1 in which the base 10 functions as an oil barrier as described above, the opening on the top surface of the base 10 at the position where the exhaust chamber 30b is formed is blocked by a component mounting plate 140 to prevent rainwater that has entered the exhaust chamber 30b through the exhaust port 38 from falling into the oil storage tank 17, and the component mounting plate 140 is configured to allow components such as the partition wall 37 and the heat exchanger 51 of the engine 50 to be placed on top of the component mounting plate 140.

[0016] Such a component mounting plate 140 has a rectangular shape in plan view defined by two sides (first side 140a and second side 140b) arranged in the width direction of the base 10 and two sides (third side 140c and fourth side 140d) arranged in the longitudinal direction of the base 10, as shown in FIG. 9(B). In the conventional soundproof box 1, the distance W between the inner surfaces of the side walls 13a in the longitudinal direction of the base 10 is in In contrast, the length l of the two sides (first side 140a, second side 140b) of the component mounting plate 140 arranged in the width direction of the base 10 is made slightly shorter so that the component mounting plate 140 can be fitted into the side walls 13 (13a, 13b) of the base 10.

[0017] The component mounting plate 140 configured in this manner has an upward flange 141 on its first side 140a and a downward flange 145 on its second side 140b, with the downward flange 145 being formed to be the same length as the second side 140b, while the upward flange 141 is formed to be slightly longer than the first side 140a, and is configured so that ends 141a, 141b of the upward flange 141 protrude beyond both ends of the first side 140a.

[0018] Then, the aforementioned first edge 140a is positioned at the center of the base 10, and ends 141a, 141b of the upward flange 141 protruding from both ends of the first edge 140a are engaged with the upper edges of the longitudinal side walls 13a, 13a of the base 10, and the downward flange 145 is brought into contact with the inner surface of the widthwise side wall 13b of the base 10. With this in mind, the component mounting plate 140 is attached to the base by welding or other method so that the upper surface of the component mounting plate 140 is at the same height as the upper surface of the bracket 21 provided at the upper end of the side wall 13 of the base 10. [Prior art documents] [Patent documents]

[0019] [Patent Document 1] JP 2018-131928 A Summary of the Invention [Problem to be solved by the invention]

[0020] In the conventional part mounting plate 140 described above, the ends 141a, 141b of the upward flange 141 are engaged with the upper edges of the longitudinal side walls 13a, 13a of the base 10, but the length l of the first side 140a and the second side is longer than the distance W between the inner surfaces of the longitudinal side walls 13a, 13a of the base 10. in Therefore, before the component mounting plate 140 is fixed to the base 10 by welding or the like, the component mounting plate 140 will fall into the base 10 if not supported, as shown in FIG. 10.

[0021] Therefore, when attaching the part mounting plate 140 to the base 10, it was necessary to align the upper surface of the part mounting plate 140 so that it was at the same height as the upper surface of the bracket 21 provided on the upper edge of the side wall 13 of the base 10, and then temporarily fix the part mounting plate 140 in place using a jig or the like, and then perform welding or the like in this state.

[0022] As a result, the mounting work of the component mounting plate 140 is complicated, and misalignment is likely to occur during mounting.

[0023] Furthermore, when the part mounting plate 140 is attached by partial welding, rainwater that falls onto the part mounting plate 140 through the exhaust port 38 can fall into the oil storage tank 17 through the gaps δ [see Figure 9 (B)] that occur between the second edge 140b, the third edge 140c, and the fourth edge 140d of the part mounting plate 140 and the inner surface of the side wall 13 (13a, 13b) of the base 10.

[0024] Therefore, in order to prevent rainwater that falls on the part mounting plate 140 from falling into the oil storage tank 17, it is necessary to fill this gap δ by filling it with a sealing material, etc., and the installation work of the part mounting plate 140 cannot be completed by welding work alone, so not only does it increase the number of work steps, but it also takes time for the filled sealing material to dry and harden, which makes the work longer.

[0025] Furthermore, in this configuration, if the gap δ is not completely filled due to insufficient filling of the sealing material, there is still a risk that rainwater that falls onto the part mounting plate 140 will enter the oil storage tank 17. Also, even if the sealing material is properly filled at the time of shipment, if the sealing material peels off or floats over time, rainwater that falls onto the part mounting plate 140 will enter the oil storage tank 17 through this area.

[0026] Therefore, the present invention has been made to eliminate the drawbacks of the above-mentioned conventional technology, and aims to provide a soundproof box for engine-driven work machines which has a relatively simple structure, yet allows for easy installation of the above-mentioned part mounting plate, and is designed to prevent rainwater falling onto the part mounting plate from entering the oil tank, even if no sealing material is filled in. [Means for solving the problem]

[0027] The means for solving the problems are described below together with the reference numerals used in the description of the embodiment of the invention. The reference numerals are used to clarify the correspondence between the description of the claims and the description of the embodiment of the invention, and needless to say, are not used to restrict the interpretation of the technical scope of the present invention.

[0028] Furthermore, in this specification, terms such as "first" and "second" are used only to distinguish components or elements, and these terms do not have an ordinal meaning that specifies rank, hierarchy, etc.

[0029] In order to achieve the above object, the soundproof box 1 of the engine-driven working machine of the present invention is: A soundproof box 1 for an engine-driven working machine is provided with a base 10 that is open at the top and has a rectangular shape in plan view and functions as an oil barrier, and on which an engine 50 and a working machine body 70 driven by the engine 50 are mounted, and a soundproof case 30 that covers the base 10, the space inside the soundproof case 30 being divided into two chambers by a vertically erected partition wall 37, one of which is an engine chamber 30a in which the engine 50 and working machine body 70 are housed, and the other chamber is an exhaust chamber 30b that opens to the outside of the machine via an exhaust port 38. A part mounting plate 40 having a rectangular shape in a plan view is provided to close the upper opening of the base 10 at the position where the exhaust chamber 30b is formed, Among the sides 40a to 40d of the component mounting plate 40, the length l of the first side 40a and the second side 40b arranged in the width direction of the base 10 is formed to be longer than the interval Win between the inner surfaces of the two side walls 13 forming the longitudinal direction of the base 10, The part mounting plate 40 is attached to the base 10 with the bottom surface of the part mounting plate 40 placed on the upper end edges of the side walls 13a, 13a in the longitudinal direction of the base 10 and on the upper end edge of one side wall 13b in the width direction. At the same time, A plate-shaped bracket 21 is provided on the base 10 from the outer upper end surface of each of the longitudinal side walls 13a, 13a of the base 10, protruding horizontally and supporting the lower end edge of the soundproof case 30. A water stop plate 22 is provided protruding upward from the inside end of each bracket 21, except for the mounting position of the part mounting plate 40, At least two longitudinal sides of the base 10 are formed by angle members 12, 12 having an L-shaped cross section, and the base 10 is assembled so that one piece 12a of each angle member 12, 12 protrudes vertically and the other piece 12b protrudes horizontally from the lower end of the piece 12a. The bracket 21 is attached at a position lower than the upper end edge of the piece 12a of the angle member 12. The portion of the piece 12a of the angle bar 12 that is located above the mounting position of the bracket 21 serves as the water stopper 22, and the other portion serves as the longitudinal side wall 13a of the base 10. This is characterized by the above (Claim 1).

[0030] before An upward flange 41 may be provided on the first side 40a of the component mounting plate 40, and the component mounting plate 40 may be attached so that the first side 40a is positioned toward the center of the base 10, and the upward flange 41 may connect the ends 22a, 22a of each of the water stop plates 22, 22 (Claim 2).

[0033] The bracket 21 is provided over the entire length of the upper end of the longitudinal side wall 13a of the base 10, The component mounting plate 40 may be placed on the bracket 21 provided on the base 10 (see claim 3 (See Figure 1).

[0034] In this way, in a configuration in which the component mounting plate 40 is placed on the bracket 21, positioning through holes 61, 62 may be provided at corresponding positions on both the bracket 21 and the component mounting plate 40 in the overlapping portion between the bracket 21 and the component mounting plate 40 (see claims 20 and 21). 4 (See Figure 1).

[0035] The bracket 21 may be provided on the upper end of the longitudinal side wall 13a of the base 10 excluding the mounting position of the component mounting plate 40. In this case, The mounting position of the component mounting plate 40 of The above The side walls 13 (13a, 13b) of the base 10 are formed slightly lower than other parts, for example, by the thickness of the component mounting plate 40. When mounting the component mounting plate 40 on the base 10, the first side 40a of the component mounting plate 40 may be abutted against a formed end 21a, which is an end of the bracket 21 on the component mounting plate 40 side, and the third side 40c and the fourth side 40d of the component mounting plate 40, which are arranged in the longitudinal direction of the base 10, may be formed in a shape such that they are arranged on an extension of the edge of the bracket 21 (see claim 5,6 (See Figure 4).

[0036] In this case, the upward flange 41 is provided so as to protrude toward the center of the base 10 from the first side 40a of the component mounting plate 40, for example by the dimension γ of the bend R, and is formed longer than the interval Wout between the outer surfaces of the longitudinal side walls 13a, 13a of the base 10 [see FIG. 1(B)], The forming end 21a of each of the brackets 21 may be provided with a notch 23 that fits with the end 41a of the upward flange 41 (see claims 20 and 21). 7 (See Figure 5).

[0037] Furthermore, the bracket 21 is provided over the entire length of the upper end of the longitudinal side wall 13a of the base 10, Among the sides 40a to 40d of the component mounting plate 40, a third side 40c and a fourth side 40d arranged in the longitudinal direction of the base 10 are each further provided with an upward flange 42, At the mounting position of the part mounting plate 40, a notch 24 is provided with a predetermined width on one side of the side wall 13a of each of the brackets 21, and the side wall 13 (13a, 13b) of the base 10 at that position is formed slightly lower (for example, by the thickness of the part mounting plate 40) than other portions, The lower end of the upward flange 42 provided on the third side 40c and the fourth side 40d of the component mounting plate 40 may be fitted into the notch 24 (see claim 8 (See Figure 6). Effect of the Invention

[0038] With the configuration of the present invention as described above, the soundproof box 1 for the engine-driven working machine of the present invention can provide the following remarkable effects.

[0039] The length l of the first side 40a and the second side 40b of the component mounting plate 40 arranged in the width direction of the base 10 is defined as the distance W between the inner surfaces of the two side walls 13a forming the longitudinal direction of the base 10. in The component mounting plate 40 is formed to be longer than the upper end edges of the two longitudinal side walls 13a, 13a of the base 10 and the upper end edge of one of the widthwise side walls 13b, and then the component mounting plate 40 is attached to the base 10 with its bottom surface placed on the upper end edges of the two longitudinal side walls 13a, 13a of the base 10 and the upper end edge of one of the widthwise side walls 13b.This prevents the component mounting plate 40 from falling into the base 10 even without being fixed with a jig or the like, making it easy to install the component mounting plate 40.

[0040] Furthermore, by mounting the part mounting plate 40 in this manner with its bottom surface placed on the upper edge of the side wall 13 (13a, 13b) of the base, the opening of the base 10 located within the exhaust chamber 30b is completely covered by the part mounting plate 40, making it difficult for rainwater that falls onto the part mounting plate 40 to enter the oil storage tank 17 even when filling with sealing material, etc. is omitted.

[0041] Furthermore, in a configuration provided with positioning through holes 61, 62 and notches 23, 24 for positioning the component mounting plate 40 at a predetermined position on the base 10, the component mounting plate 40 can be accurately and easily positioned at the mounting position on the base 10, further improving the ease of installation when mounting the component mounting plate 40. [Brief description of the drawings]

[0042] [Figure 1] 1A and 1B are perspective views (Example 1) of the main parts of the base for mounting the part mounting plate, in which (A) shows the state where the part mounting plate is removed, and (B) shows the state where the part mounting plate is attached. [Diagram 2] FIG. 13 is an exploded perspective view of a main part showing a configuration example of the base (configuration example using channel material). [Diagram 3] FIG. 13 is an exploded perspective view of a main part showing an example of a base configuration (example of a configuration using angle bars). [Figure 4] 11A and 11B are perspective views (Example 2) of the main parts of the base for mounting the part mounting plate, in which (A) shows the state where the part mounting plate is removed, and (B) shows the state where the part mounting plate is attached. [Diagram 5] An enlarged view of the portion indicated by the V arrow in FIG. 4(A). [Figure 6] 11A and 11B are perspective views (Example 3) of the main part of the base for mounting the part mounting plate, in which (A) shows the state where the part mounting plate is removed, and (B) shows the state where the part mounting plate is attached. [Figure 7] FIG. 2 is a perspective view of a soundproof box for an engine-driven working machine. [Figure 8] FIG. 2 is a perspective view of the inside of a soundproof box for an engine-driven work machine that houses component equipment. [Figure 9] 1A is a perspective view of the essential parts of the base for mounting the part mounting plate (conventional), with the part mounting plate removed, and (B) is a perspective view of the essential parts of the base for mounting the part mounting plate (conventional), with the part mounting plate removed, and (B) with the part mounting plate attached. [Figure 10] FIG. 1 is an explanatory diagram of problems with the conventional parts mounting plate. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0043] The soundproof box 1 for an engine-driven working machine according to the present invention will be described below with reference to the accompanying drawings.

[0044] The basic configuration of the soundproof box 1 of the engine-driven working machine of the present invention is similar to the structure of the conventional soundproof box 1 described with reference to Figures 7 and 8, and includes a base 10 configured as a rectangular frame in a plan view on which the components of the engine-driven working machine are placed, and a soundproof case 30 covering the upper part of the base 10 on which the components are placed.

[0045] This base 10 is given the function of an oil barrier through a known configuration, which is similar to the configuration of the soundproof box 1 described as the prior art.The configuration for giving this function as an oil barrier is not limited to this configuration, but as an example, it is possible to adopt a configuration that houses a box-shaped oil storage tank 17 that opens upwards, as shown in Figure 8.

[0046] In addition, in order to give the base 10 the function of an oil barrier, various known configurations can be adopted, such as the configuration in which the oil storage tank 17 is housed within the base 10 as described above, a configuration in which the base 10 is placed on top of a box-shaped oil storage tank 17 that opens upward, and a configuration in which the bottom of the base 10 is covered with a bottom plate so that the base 10 itself functions as an oil storage tank.

[0047] In addition, the inside of the soundproof case 30 is divided into two chambers, an engine chamber 30a and an exhaust chamber 30b, by a vertically erected partition wall 37, and the opening on the top surface of the base 10 at the position of the exhaust chamber 30b is blocked by a component mounting plate, which are also similar to the configuration of the soundproof box 1 described as the prior art, and therefore a description of the basic structure of the soundproof box 1 that is common to the prior art will be omitted.

[0048] Figure 1 shows the structure of the attachment portion of a component mounting plate 40 to a base 10 of such a soundproof box 1. As shown in Figure 1(B), the base 10 is provided with plate-shaped brackets 21, 21 which protrude horizontally from the outer upper surfaces of the side walls 13a, 13a which form the longitudinal direction of the base 10, and is configured so that the lower edge of a soundproof case 30 can be placed on these brackets 21, 21.

[0049] In addition, water stops 22, 22 are provided on the upper part of the base 10, except for the mounting position of the component mounting plate 40 described later, which protrude upward from the inside end of the brackets 21, 21. These water stops 22, 22 prevent rainwater that has seeped in through the gap Δ (see Figures 7 and 8) between the upper surface of the bracket 21 and the lower edge of the soundproof case 30 from further infiltrating into the inside of the aircraft.

[0050] A base 10 equipped with such a bracket 21 and water stop plate 22 can be formed by forming at least two longitudinal sides of the base 10 from a channel material 11 having a U-shaped cross section, as shown in Figure 2 as an example.

[0051] In the example shown in Figure 2, the channel material 11 is assembled to the base 10 with the flanges 11a, 11b arranged above and below, so that the web 11c portion of the channel material 11 forms the longitudinal side wall 13a of the base 10.

[0052] The flange 11a of the channel material 11 arranged on the upper side is formed into a bracket 21 on which the lower edge of the soundproof case 30 described above is placed, and the water stop plate 22 described above, which protrudes upward from the aircraft interior end of the bracket 21, except for the mounting position of the component mounting plate 40 described below, is formed by attaching a metal strip to the upper surface of the bracket 21 and the upper end of the side wall 13a described above by a method such as welding.

[0053] In addition, the symbol 26 in Figure 2 is a reinforcing rib, and the side edge of this rib 26 is attached to the side wall 13a of the base by a method such as welding, and the upper end of the rib 26 is attached to the bottom surface of the bracket 21 and the lower end is attached to the upper surface of the flange 11b by a method such as welding, thereby reinforcing the base 10.

[0054] In the structure of the base 10 described above with reference to Figure 2, the two longitudinal sides of the base 10 are formed from a channel material 11, and the web 11c and flange 11a of this channel material 11 form the longitudinal side wall 13a and bracket 21 of the base 10, thereby forming a configuration in which the longitudinal side wall 13a and bracket 21 of the base 10 are integrally formed, and a water stop plate 22 can be attached later.

[0055] Conversely, the water stop 22 may be integrally formed with the longitudinal side wall 13a of the base 10, and the bracket 21 may be attached later.

[0056] In this case, as an example, as shown in Figure 3, at least two longitudinal sides of the base 10 are formed by angle irons 12 having an L-shaped cross section, and the base 10 is assembled so that one piece 12a of each angle iron 12 protrudes vertically and the other piece 12b protrudes horizontally from the lower end position of the piece 12a.

[0057] Then, a metal plate protruding horizontally from the upper edge of the piece 12a of the angle iron 12 is welded or otherwise attached to a predetermined position lower than that position to form the bracket 21 mentioned above, and the portion of the piece 12a of the angle iron 12 that is located above the attachment position of the bracket 21 (above the top surface of the bracket 21) forms the water stop plate 22 mentioned above, and the remaining portion forms the longitudinal side wall 13a of the base 10.

[0058] In the configuration shown in Figure 3, as with the base 10 described in Figure 2, no water stop plate 22 is provided on the upper part of the base 10 at the mounting position of the component mounting plate 40, and the height of one piece 12a of the angle iron 12 at the mounting position of the component mounting plate 40 is formed in advance lower than the other parts by the height of the water stop plate 22. 3 denotes a reinforcing rib, which is the same as the configuration of the base 10 described with reference to FIG.

[0059] The above-mentioned component mounting plate 40, which covers the upper surface of the base 10 at the position where the exhaust chamber 30b is formed, has a length l of two sides (first side 40a and second side 40b) arranged in the width direction of the base 10 among the sides 40a to 40d of the component mounting plate 40, which is equal to or larger than the distance W between the inner surfaces of the side walls 13a, 13a forming the longitudinal direction of the base 10. in and is configured so that, when placed on the upper surface of the base 10, the bottom surface of the component mounting plate 40 can be placed on the upper edges of the two side walls 13a, 13a that form the longitudinal direction of the base 10 and on the upper edge of one of the side walls 13b that form the width direction.

[0060] In the embodiment (embodiment 1) shown in FIG. 1, the above-mentioned bracket 21 is provided over the entire length of the upper end of the side walls 13a, 13a in the longitudinal direction of the base 10, and the length l of the first side 40a and the second side 40b of the part mounting plate 40 is set to the interval W between the edges of the brackets 22, 22 provided at the upper ends of the side walls 13a, 13a in the longitudinal direction of the base 10. br was formed to the same length.

[0061] This allows the component mounting plate 40 to be placed on the base 10 in a stacked state on the brackets 21 provided on the upper ends of the longitudinal side walls 13a, 13a of the base 10.

[0062] Of the sides 40a to 40d of this part mounting plate 40, the first side 40a, which is located toward the center of the base 10, is provided with an upward flange 41, and when the part mounting plate 40 is attached to the base 10, this upward flange 41 connects the ends 22a, 22a of the water stop plates 22, 22 provided on the longitudinal side walls 13a, 13a of the base 10, so that rainwater that falls onto the part mounting plate 40 through the air exhaust port 38 cannot fall over this upward flange 41 into the oil storage tank 17 provided in the base 10.

[0063] In the configuration shown in Figure 1, no bracket 21 is provided at the upper end of the widthwise side wall 13b of the base 10, but a bracket 21 similar to that at the upper end of the longitudinal side wall 13a may be provided at the upper end of the widthwise side wall 13b of the base 10, and the bottom surface of the component mounting plate 40 at a predetermined width from the second edge 40b of the component mounting plate 40 may be placed on this bracket.

[0064] In addition, reference numerals 61 and 62 in FIG. 1(A) are through holes for positioning, and the through hole 62 provided in the bracket 21 of the base 10 and the through hole 61 provided in the component mounting plate 40 are provided at corresponding positions.

[0065] In this way, by configuring the bottom surface of the component mounting plate 40 so that it can be placed on the upper edge of the side wall 13 (13a, 13b) of the base 10 or on the bracket 21, the component mounting plate 40 can be held in the mounting position on the base 10 without temporary fastening with a jig, even before it is attached to the base 10 by welding or the like, making it easy to install the component mounting plate 40.

[0066] In particular, in a configuration having the above-mentioned positioning through holes 61, 62, by aligning the through holes 61, 62, the component mounting plate 40 can be easily positioned at the exact mounting position on the base 10, thereby further improving the ease of installation of the component mounting plate 40.

[0067] Furthermore, by attaching the part mounting plate 40 to the base 10 in the manner described above, the part mounting plate 40 protrudes outward from the upper edges of the side walls 13 (13a, 13b) of the base 10 like a eave, so that rainwater that falls on the part mounting plate 40 is guided to a position away from the upper edges of the side walls 13 (13a, 13b) of the base 10, as shown by the arrow in Figure 1 (B), and is discharged outside the machine.

[0068] As a result, the structure is such that rainwater that falls onto the component mounting plate 40 is less likely to enter the oil storage tank 17 provided within the base 10.

[0069] The mounting structure of the component mounting plate 40 described above with reference to Figure 1 has been described as including a bracket 21 extending over the entire length of the upper ends of the longitudinal side walls 13a, 13a of the base 10, and the component mounting plate 40 is stacked and placed on top of this bracket 21.

[0070] In contrast to this, in the mounting portion of the component mounting plate 40 of the embodiment (embodiment 2) shown in Figure 4, the above-mentioned bracket 21 is not provided on the base 10 at the mounting position of the component mounting plate 40, and the height of the side wall 13 (13a, 13b) of this portion is formed slightly lower than other portions, for example, by the thickness of the component mounting plate 40.

[0071] The length l of the first side 40a and the second side 40b of the component mounting plate 40 is set to the distance W between the edges of the brackets 21, 21 provided on the upper edges of the side walls 13a, 13a in the longitudinal direction of the base 10. br[See Figure 1 (B)], and of the respective sides 40a to 40d of the component mounting plate 40, the first side 40a located toward the center of the base 10 is abutted against the formed end 21a, which is the end portion of the bracket 21 on the component mounting plate 40 side, and placed on the base 10, so that the upper surface of the component mounting plate 40 and the bracket 21 are at the same height, and the third side 40c and fourth side 40d of the component mounting plate 40 located in the longitudinal direction of the base 10 are positioned on the extension of the edge of the bracket 21.

[0072] In this configuration, at the mounting position of the component mounting plate 40, the lower edge of the soundproof cover 30 is placed on the part of the component mounting plate 40 that protrudes outside the machine from the upper outer surface of the side wall 13 (13a, 13b) of the base 10.

[0073] In this manner, in the configuration in which the first side 40a of the component mounting plate 40 arranged at the center of the base 10 is butted against the forming end 21a of the bracket 21 to mount the component mounting plate 40 to the base, as shown in FIG. 5, the above-mentioned upward flange 41 is arranged so as to be spaced apart from the outer surfaces of the side walls 13a, 13a in the longitudinal direction of the base 10 by a distance W out 1(B)!] and is provided so as to protrude slightly toward the center of the base 10 from the first side 40a of the component mounting plate 40, for example by the dimension γ of the bend R.

[0074] Furthermore, notches 23 that fit into each of the ends 41a of the upward flange 41 are provided at the corners of the formed end 21a of the bracket 21 on the side wall 13a side, thereby enabling the component mounting plate 40 to be positioned at an accurate position on the base 10.

[0075] As a positioning structure for the component mounting plate 40, instead of or in addition to the above configuration, a positioning notch or protrusion may be provided on the forming end 21a of the bracket 21, and a protrusion or notch that fits into the notch or protrusion may be provided on the first edge 40a of the component mounting plate 40.

[0076] In the configuration described above with reference to Figure 4, no bracket 21 is provided at the mounting position of the component mounting plate 40, and a notch 23 is provided at the corner of the forming end 21a of the bracket 21 on the longitudinal side wall 13a side of the base 10, into which the end 41b of the upward flange 41 provided on the component mounting plate 40 fits, allowing positioning.

[0077] In contrast, in the embodiment (embodiment 3) shown in Figure 6, a configuration is adopted in which brackets 21 are provided along the entire length of the two longitudinal side walls 13a of the base 10, and at the mounting position of the component mounting plate 40, a notch 24 of a predetermined width is provided on one side of each bracket 21 facing the side wall 13a, and the height of the side walls 13 (13a, 13b) of the base 10 at the mounting position of the component mounting plate 40 is made slightly lower than other parts, for example by the thickness of the component mounting plate 40.

[0078] Furthermore, the component mounting plate 40 not only has an upward flange 41 on the first side 40a, but also has upward flanges 42 on the third side 40c and fourth side 40d arranged in the longitudinal direction of the base 10, thereby connecting the three flanges 41, 42.

[0079] The component mounting plate 40 configured in this manner is attached to the upper surface of the base 10 so that the lower ends of the upward flanges 42 provided on the third side 40c and the fourth side 40d are fitted into the aforementioned notches 24.

[0080] With this configuration, the component mounting plate 40 can be accurately positioned at the desired mounting position simply by placing it at a predetermined position on the base 10.

[0081] Furthermore, due to the configuration of the part mounting plate 40 in this manner, rainwater that falls onto the part mounting plate 40 is discharged from the second side 40b where the upward flanges 41, 42 are not provided, as shown by the arrows in Figure 6 (B), and is therefore unable to enter the oil storage tank 17 provided within the base 10 through the gap between the lower ends of the upward flanges 42, 43 provided on the third side 40c and fourth side 40d of the part mounting plate 40 and the bracket 21 at the cutout 24. [Explanation of symbols]

[0082] 1 Soundproof box 10 Foundations 11 Channel material 11a, 11b Flange (of channel material) 11c Web (channel material) 12 Angle iron 12a Piece (of angle iron) 12b Other piece (angle bar) 13 Side wall (of base) 13a Longitudinal side wall 13b Width direction side wall 17 Oil storage tank 21 Bracket 21a Formed end (of bracket) 22 Waterstop 22a End (of waterstop) 23,24 Notch 26 Ribs 30 Soundproof Case 30a Engine room 30b Ventilation room 31 Front Panel 32 Rear panel 33 Side Panel 34 Top Panel 35 Windows 36 Doors 37 Partition Wall 38 Ventilation outlet 40 Parts mounting plate 40a First side (of the component mounting plate) 40b Second side (of the component mounting plate) 40c Third side (of component mounting plate) 40d Fourth side (of component mounting plate) 41 Upward flange (provided on the first side) 41a, 41b Ends (of the upward flange 41) 42 Upward flange (provided on the third and fourth sides) 50 Engine 51 Heat exchanger 53 Cooling fan 61,62 Through holes 70 Work machine body (generator body) 140 Parts mounting plate 140a First side (of component mounting plate) 140b Second side (of the component mounting plate) 140c Third side (of component mounting plate) 140d Fourth side (of component mounting plate) 141 Upward flange (provided on the first side) 141a, 141b Ends (of upward flanges) 145 Downward flange (on second side) l Length of the first and second sides of the component mounting plate W in Distance between the inner surfaces of the longitudinal side walls of the base W out Distance between the outer surfaces of the longitudinal side walls of the base W br The distance between the edges of the brackets on the upper edges of the longitudinal side walls of the base γ Bending R dimension

Claims

1. A soundproof box for an engine-driven working machine, comprising a base that is open at the top and has a rectangular shape in plan view and functions as an oil barrier, on which an engine and a working machine body driven by the engine are mounted, and a soundproof case that covers the base, the space inside the soundproof case being divided into two chambers by a vertically erected partition wall, one of which is an engine chamber in which the engine and working machine body are housed, and the other chamber is an exhaust chamber that opens to the outside of the machine through an exhaust port, a part mounting plate having a rectangular shape in a plan view is provided to close an upper opening of the base at a position where the exhaust chamber is formed; Among the sides of the component mounting plate, the lengths of a first side and a second side arranged in a width direction of the base are formed to be longer than a distance between inner surfaces of two side walls forming a longitudinal direction of the base, The component mounting plate is attached to the base in a state in which the bottom surface of the component mounting plate is placed on the upper end edges of the side walls in the longitudinal direction of the base and on the upper end edge of one side wall in the width direction of the base, and A plate-shaped bracket is provided on the base from the outer surface of the upper end of each of the longitudinal side walls of the base, protruding horizontally and supporting the lower end edge of the soundproof case, A water stop plate is provided protruding upward from the inner end of each bracket, except for the mounting position of the part mounting plate, At least two longitudinal sides of the base are formed from angle members having an L-shaped cross section, and the base is assembled so that one end of each angle member protrudes vertically and the other end protrudes horizontally from the lower end of the one end. The bracket is attached at a position lower than the upper end edge of the piece of the angle iron. A soundproof box for an engine-driven working machine, characterized in that the portion of the piece of angle iron that is located above the mounting position of the bracket serves as the water stop plate, and the other portion serves as the longitudinal side wall of the base.

2. A soundproofing box for an engine-driven working machine as described in claim 1, characterized in that an upward flange is provided on the first edge of the part mounting plate, the part mounting plate is attached so that the first edge is positioned toward the center of the base, and the upward flange connects the ends of each of the water stop plates.

3. The bracket is provided over the entire length of the upper end of the longitudinal side wall of the base, 3. A soundproof box for an engine-driven working machine according to claim 1, wherein said part mounting plate is placed on said bracket provided on said base.

4. 4. A soundproof box for an engine-driven working machine according to claim 3, wherein positioning through holes are provided at corresponding positions on both said bracket and said part mounting plate in the overlapping portion between said bracket and said part mounting plate.

5. The bracket is provided on an upper end of a side wall in the longitudinal direction of the base except for a mounting position of the component mounting plate, and the side wall of the base at the mounting position of the component mounting plate is formed slightly lower than other portions, 2. The soundproof box for an engine-driven working machine according to claim 1, wherein the part mounting plate is formed in such a shape that, when attached to the base, the first side of the part mounting plate is abutted against a formed end which is the end of the bracket on the part mounting plate side, and the third and fourth sides of the part mounting plate, which are arranged in the longitudinal direction of the base, are arranged on extensions of the end edges of the bracket.

6. The bracket is provided on an upper end of the longitudinal side wall of the base excluding the mounting position of the part mounting plate, and the side wall of the base at the mounting position of the part mounting plate is formed slightly lower than other parts, 3. A soundproof box for an engine-driven working machine as claimed in claim 2, characterized in that, when attached to the base, the first side of the part mounting plate is abutted against a formed end which is the end of the bracket on the part mounting plate side, and the third and fourth sides of the part mounting plate, which are arranged in the longitudinal direction of the base, are arranged on extensions of the end edges of the bracket, and the part mounting plate is formed in a shape such that

7. the upward flange is provided so as to protrude toward the center of the base from the first side of the component mounting plate, and is formed to be longer than the distance between the outer surfaces of the side walls of the base in the longitudinal direction; 7. A soundproof box for an engine-driven working machine according to claim 6, wherein said formed end of each of said brackets is provided with a notch for mating with an end of said upwardly facing flange.

8. The bracket is provided over the entire length of the upper end of the longitudinal side wall of the base, Among the sides of the component mounting plate, a third side and a fourth side arranged in the longitudinal direction of the base are further provided with upward flanges, At the mounting position of the component mounting plate, a notch is provided in one side of the side wall of each of the brackets with a predetermined width, and the side wall of the base at that position is formed slightly lower than other portions, 3. A soundproof box for an engine-driven working machine according to claim 1, wherein lower ends of said upward flanges provided on said third side and said fourth side of said part mounting plate are fitted into said notches.

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