JP2023119478A - Oilproof structure for work machine - Google Patents

Abstract

To provide an oilproof structure for a work machine 1 capable of preventing leaked oil from flowing out from a clearance W1 between a frame casing 11 and an oil retaining dike 14 and also preventing sound leakage while adopting a configuration in which the oil retaining dike 14 is accommodated in the frame casing 11.SOLUTION: In an oilproof structure for a work machine, the work machine 1 comprises a frame 10 serving as a base table and a soundproof box 2 constituted by a soundproof case 2a covering an upper side of the frame 10. The frame 10 is composed of: a frame casing 11 serving as an outer frame of the frame 10; and a bottomed frame type oil retaining dike 14 accommodated in the frame casing 11 and opened upwardly. A communication port 13 communicating a space in the soundproof case 2a with a space in the oil retaining dike 14 is provided on an upper surface of the frame casing 11, and an elastic closing member 20 is disposed in a clearance W1 generated between the frame casing 11 and the oil retaining dike 14.SELECTED DRAWING: Figure 5

Description

The present invention relates to an oil-proof structure of a work machine, and for example, a work machine equipped with an oil-cooled compressor body and a soundproof box that houses components such as an engine and a motor that drive the compressor. Even in the event that oils such as oil or fuel have leaked, work that can prevent the leaked oil from leaking out of the machine by keeping it inside the machine and prevent the noise inside the machine from leaking outside. Regarding the oil-proof structure of the machine.

For work equipment equipped with an engine such as a generator or compressor as a drive source, it is necessary to prevent noise during operation from leaking to the outside, and to protect the components such as the engine, work equipment body, fuel tank, etc. from the weather. There is a so-called "soundproof working machine" in which the components are housed in a soundproof box, for example, a box made of steel plate, so as to prevent the above-mentioned noise.

A soundproof box 61 used in a conventional soundproof work machine 60 includes, for example, a frame 63 functioning as a mount on which components are mounted, and a frame 63 on which the work machine main body and the like are mounted, as shown in FIG. It is composed of a soundproof case 62 covering the top.

The frame 63 is composed of a frame 64 and an oil barrier 65 detachably housed in the frame 64 . The oil dike 65 is generally a frame-type container with a bottom that opens upward. Fuel and lubricating oil are collectively referred to as "oils".) to prevent them from leaking out of the machine and contaminating the surrounding environment.

The frame 64 is an outer frame of the frame 63, and is formed by connecting four channel steels to form a rectangular frame in plan view. End plates and horizontal members are installed on the upper surface so that components such as the main body of the work machine can be placed.

The frame 64 configured as described above has a space formed therein for accommodating the oil barrier 65, and an opening 66 is provided on the bottom surface thereof. It is configured so that the oil barrier 65 can be put in and taken out from inside 64 .

In addition, a communication port 67 is formed on the upper surface of the frame 64 to allow communication between the space in the soundproof case 62 and the space in the oil barrier 65 when the soundproof case 62 is attached. Leakage (leakage) of oils such as fuel and lubricating oil from the engine and work machine main body placed on the frame frame 64 and housed in the soundproof case 62, and from devices such as piping that introduces fuel and lubricating oil to these (leakage) If there is oil, the leaked oils and fats fall through the communication port 67 into the oil barrier 65 accommodated in the frame 64 and are collected.

Here, in the structure in which the oil dike 65 is housed inside the frame 64 as described above, the oil dike 65 is formed inside the frame 64 so that it can be inserted into and removed from the inside of the frame 64. Therefore, if the oil barrier 65 is housed in the frame 64, a gap W1 is formed between the inner surface of the side wall of the frame 64 and the outer surface of the side wall of the oil barrier 65. put away.

Due to the gap W1, for example, as indicated by the arrow line in FIG. There was a risk of leakage to the outside of the machine through the gap W1.

Furthermore, the gap W1 leaks the sound N inside the machine, such as the engine sound, and causes noise.

In order to solve the above problem, Patent Document 1 discloses a frame 73 having a function as a stand for mounting components and a work machine main body, etc., as shown in FIG. The frame 73 is composed of a frame 74 forming an outer frame and an oil barrier 75 accommodated in the frame 74, and the bottom of the frame 74 The oil barrier 75 can be put in and taken out through the opening 76 provided in the frame 74, and the oil (leak oil) leaked from the equipment mounted on the frame 74 through the communication port 77 provided on the upper surface of the frame 74. In the soundproof box 71 configured so that the oil can fall into the oil barrier 75, the upper part of the gap W1 generated between the side wall of the frame 74 and the side wall of the oil barrier 75 is removed from the side wall of the frame 74. It is proposed to cover the opening of the dike 75 with a guide plate 78 protruding downward to guide the leaked oil generated in the soundproof box 71 to the dike 75 and prevent the leaked oil from entering the gap W1. ing.

In addition, as shown in FIG. 17, Patent Document 2 discloses a base which supports an engine and components (not shown) such as a work machine body driven by the engine from below and is surrounded by a plate material. 83 (corresponding to the above-mentioned "framework"), a fuel tank 88 for storing the fuel of the engine, and a soundproof case ( (not shown) and the inner surface of the base 83 with a gap W1 interposed therebetween to receive and store the leaked substance generated in the soundproof case 84 (described above). ), a water receiving gutter 85 is provided over the entire circumference of the outer upper portion of the leakage storage tank 84, and the entire inner surface of the base 83 is provided. A guide plate 86 is provided on the periphery so as to be lowered from the side of the base 83 toward the side of the water receiving gutter 85 so as to guide the rainwater that has flowed down from above into the water receiving gutter 85. An elastic closing member 87 is interposed between the receiving gutter 85 and the guide plate 86 to seal the gap W1, thereby preventing the noise inside the machine from leaking to the outside through the gap W1. It is proposed that the base and the discharged rainwater are prevented from blowing up.

Japanese Patent Application Laid-Open No. 2018-131928 Japanese Patent Application Laid-Open No. 2021-113542

However, in the soundproof box 70 disclosed in Patent Document 1 above, as shown in FIG. There was a problem that sound leakage occurred through

Further, in the engine-driven work machine 80 disclosed in Patent Document 2, a discharge hole (not shown) is provided in the water receiving trough 85 in order to prevent the water receiving trough 85 from becoming full. However, there is a problem that if leaked oil from on-board equipment scatters and enters the water receiving trough 85 instead of the leaked material storage tank 84, the leaked oil flows out of the machine through the discharge hole.

Accordingly, the present invention has been made in order to eliminate the above-mentioned drawbacks of the prior art. To provide an oil-proof structure of a working machine capable of preventing leaked oil from flowing out from a gap between a frame frame and an oil-proof dike while adopting it, and also preventing sound leakage.

Means for solving the problems are described below together with symbols used in the mode for carrying out the invention. This code is for clarifying the correspondence between the description of the claims and the description of the mode for carrying out the invention, and needless to say, it is used restrictively to interpret the technical scope of the present invention. not a thing

In order to achieve the above object, the oil-proof structure of the working machine 1 of the present invention comprises a frame 10 as a base on which components are placed, and a soundproof box 2 composed of a soundproof case 2a covering the frame 10. In the work machine 1 provided,
The frame 10 is composed of a frame 11 as an outer frame of the frame 10 and a bottomed frame type oil barrier 14 that is housed in the frame 11 and opens upward,
An opening 12 is provided in the bottom surface of the frame 11 so that the oil dike 14 can be put in and taken out. A communication port 13 is provided to communicate with the soundproof case 2a so that leaked oil generated in the soundproof case 2a can fall into the oil barrier 14,
The gap W1 is sealed by disposing an elastic closing member 20 in the gap W1 between the frame 11 and the oil barrier 14 (Claim 1: see FIGS. 1 to 5).

In addition, the oil-proof structure of the working machine 1 of the present invention is such that a guide plate 16 protruding from the side wall 111 of the frame 11 downwardly inclined above the opening 142 of the oil-proof dike 14 prevents the upper part of the gap W1 from increasing. with covering
The gap W1 may be sealed by disposing the elastic closing member 20 in the gap W2 between the guide plate 16 and the oil barrier 14, which communicates with the gap W1. 2: see Figures 6-7).

In addition, in the gap W2 communicating with the gap W1, the elastic closing member 20 (urethane 22 in FIG. 8) is arranged between the lower surface of the guide plate 16 and the upper end surface of the side wall 141 of the oil barrier 14. Thus, the gap W1 may be sealed (Claim 3: see FIG. 8).

Further, the oil-proof structure of the working machine 1 of the present invention is a plate-like shielding plate placed on the upper surface of the oil-protective dike 14 and covering at least the range of the communication port 13 of the opening 142 on the upper surface of the oil-protective dike 14. 30 is provided in the shielding plate 30, and a communication hole 31, which is a hole that penetrates the front and back and guides the leaked oil into the oil barrier 14, is provided in the shielding plate 30, and a rising portion 32 is provided along the outer peripheral edge of the shielding plate 30. to form
The gap W1 is sealed by disposing the elastic closing member 20 in the gap W3 between the frame 11 and the raised portion 32 of the shielding plate 30, which communicates with the gap W1. (Claim 4: see FIGS. 9 to 11).

In addition, in the gap W3 communicating with the gap W1, the elastic closure is provided between the lower surface of the upper surface of the frame 11 (the end plate 112 and the horizontal member 113 in FIG. 10) and the upper end surface of the rising portion 32. The gap W1 may be sealed by disposing a member 20 (claim 5: see FIG. 10).

Also, the shield plate 30 may be configured to cover the entire opening 142 on the upper surface of the oil barrier 14 (claim 6: see FIGS. 12 and 13).

It is preferable that the shield plate 30 is made of a noncombustible material and the fuel tank 40 is accommodated in the oil barrier 14 (claim 7).

Moreover, it is preferable that the elastic closing member 20 has liquid tightness (claim 8).

In the oil-proof structure of the present invention described above, the gap W1 formed between the frame 11 and the oil-proof dike 14 can be sealed by using the elastic blocking member 20, thus preventing leakage from the gap W1. Oil leakage and sound leakage could be prevented.

Further, an opening 12 is provided in the bottom surface of the frame 11 so that the oil dike 14 can be put in and taken out, and communicates with the gap W1 formed between the frame 11 and the oil dike 14. By disposing an elastic closing member 20 between the lower surface of the guide plate 16 and the upper end surface of the side wall 141 of the oil barrier 14, the gap W1 generated between the frame 11 and the oil barrier 14 is sealed. With this configuration, when the oil barrier 14 is removed, the elastic blocking member 20 does not come into contact with other members and rub against other members, so damage and deterioration due to rubbing can be prevented.

Similarly, an opening 12 is provided in the bottom surface of the frame 11 so that the oil dike 14 can be put in and taken out, and communicates with the gap W1 formed between the frame 11 and the oil dike 14. By arranging the elastic blocking member 20 between the lower surface of the upper surface of the frame 11 and the upper end surface of the rising portion 32 of the shielding plate 30, the above-described In the configuration in which the gap W1 is sealed, when the oil barrier 14 is removed, the elastic blocking member 20 does not come into contact with other members and rub against other members, so damage and deterioration due to rubbing can be prevented.

The oil-proof structure of the present invention having the shielding plate 30 can reduce the scattering of leaked oil by functioning as a receiver for leaked oil generated inside the soundproof box 2. The leaked oil generated in step 2 hits the fuel tank 40 housed in the oil barrier 14 and bounces, thereby preventing the oil from splashing into the gap W1.

The shielding plate 30 is configured to cover the entire opening 142 on the upper surface of the oil barrier 14, and the frame 11 communicates with the gap W1 formed between the frame 11 and the oil barrier 14. The gap W1 formed between the frame 11 and the oil barrier 14 is sealed by disposing the elastic closing member 20 in the gap W3 formed between the rising portions 32 of the shielding plate 30. In the configuration, the entire upper surface of the oil barrier 14 is blocked by the shield plate 30, and the gap W1 between the frame frame 11 and the oil barrier 14 is sealed along the entire circumference. It was possible to effectively prevent the leaked oil accumulated in the oil barrier 14 from flowing out of the machine during transportation and transportation of the machine.

In addition, in the configuration in which the shielding plate 30 made of a noncombustible material is provided and the fuel tank 40 is accommodated in the oil barrier 14, the nonflammable shielding plate 30 separates the components from the fuel tank to prevent fire. be a countermeasure.

BRIEF DESCRIPTION OF THE DRAWINGS The whole perspective view of the soundproof box provided with the oilproof structure of 1st Embodiment of this invention. The perspective view which removes the soundproof case of the soundproof box of FIG. 1, and shows the whole frame. FIG. 3 is a perspective view of the frame of FIG. 2 disassembled into a frame frame and an oil barrier; BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram of an oil-proof structure according to a first embodiment of the present invention; BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram of an oil-proof structure according to a first embodiment of the present invention; Explanatory drawing of the oil-proof structure of other embodiment of this invention. Explanatory drawing of the oil-proof structure of other embodiment of this invention. Explanatory drawing of the oil-proof structure of other embodiment of this invention. FIG. 2 is a perspective view of a frame 10 having an oil-proof structure according to a second embodiment of the present invention, which is disassembled into a frame 11 and an oil-proof dike 14; Explanatory drawing of the oil-proof structure of 2nd Embodiment of this invention. Explanatory drawing of the oil-proof structure of 2nd Embodiment of this invention. FIG. 11 is a perspective view of a frame 10 having an oil-proof structure according to a third embodiment of the present invention, which is disassembled into a frame 11 and an oil-proof dike 14; Explanatory drawing of the oil-proof structure of 3rd Embodiment of this invention. 4A and 4B are views showing other shapes of the seal rubber 21; FIG. Partial cross-sectional view of a conventional soundproof box. FIG. 2 is a partial cross-sectional view of a conventional soundproof box (Patent Document 1). FIG. 2 is a partial cross-sectional view of a conventional soundproof box (Patent Document 2).

First, a first embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a work machine 1 having a soundproof box 2. The soundproof box 2 is composed of a frame 10 and a soundproof case 2a covering the frame 10. The frame 10 and the soundproof case 2a In the space surrounded by , the main body of the work machine such as the main body of the compressor and the main body of the generator (not shown), the engine that drives the main body of the work machine, the fuel tank that supplies fuel to the engine, and other necessary equipment are accommodated. configured to be able to

The frame 10 is composed of a frame 11 and an oil barrier 14 detachably housed in the frame 11 (see FIGS. 2 and 3).

The frame 11 is an outer frame of the frame 10, and in this embodiment, a frame-like body forming a rectangle in plan view and formed by connecting four channel steels (side walls 111a to 111d), It is composed of an end plate 112 and horizontal members 113 and 114 installed on the upper surface thereof so that components such as an engine and a work machine can be placed thereon (see FIG. 3).

The frame 11 formed as described above has a space formed therein for accommodating an oil barrier 14, which will be described later, and an opening 12 is provided on the bottom surface thereof. The oil breakwater 14 can be put in and taken out.

Further, on the upper surface of the frame 11, a communication port 13 is formed to communicate the space in the soundproof case 2a with the space in the oil barrier 14 when the soundproof case 2a is attached. Oils such as fuel and lubricating oil are leaking from the engine, the main body of the work machine placed on the frame frame 11 and housed in the soundproof case 2a, and the pipes and the like that introduce the fuel and lubricating oil to these. In such a case, the leaked oil (leaking oil) falls through the communication port 13 into the oil barrier 14 accommodated in the frame 11 and is recovered.

As described above, the frame 11 of this embodiment shown in FIG. direction) is covered with an end plate 112, the upper part of the other end (rear end) is covered with a horizontal member 113, and protrudes outward from the upper end of each side wall 111a to 111c. The upper surface of the flanges 117 (117a to 117c) and the upper surfaces of the end plates 112 and the horizontal members 113 constitute the upper surface of the frame 11, and one side of the end plate 112 and the short side of the frame 11 An opening edge of the communication port 13 is formed by one side of each of flanges 117a and 117b at the upper ends of the two side walls 111a and 111b in the hand direction (horizontal direction) and one side of the horizontal member 113. As shown in FIG.

The above-mentioned oil barrier 14 accommodated in the above-mentioned frame 11 is a bottomed frame-shaped container (in the illustrated example, a container with a bottom) formed in a size that can be accommodated in the frame 11. It is configured as a bottom box-shaped container), and is equipped with liquid-tightness so that oils and fats leaked from fuel tanks, engines, work equipment, etc. can be stored inside.

In this embodiment, the oil barrier 14 is formed in a rectangular shape in a plan view that is one size smaller than the above-described frame 11, which is formed in a rectangular shape in a plan view, so that the frame 11 suspended by a crane or the like can be installed. is lowered onto an oil dike 14 disposed at an appropriate position, and the oil dike 14 can be accommodated in the frame 11 through the opening 12 of the frame 11 .

Since the oil dike 14 can be accommodated in the space inside the frame 11, when the oil dike 14 is accommodated in the frame 11, as shown in FIGS. A predetermined gap W1 is formed between the outer surface of the side walls 141a to 141d of the oil barrier 14 and the inner surface of the side walls 111a to 111d of the frame 11. As shown in FIG. It should be noted that, when oils and fats leaked from the equipment accommodated in the soundproof case 2a fall into the frame 10 through the communication port 13, if they are not collected in the oil barrier 14 and flow into the gap W1, Grease leaks out of the machine through this gap W1, contaminating the surroundings of the installation place of the soundproof working machine, and noise leaks out through the gap W1.

The oil-proof structure of the present invention seals the gap W1 with an elastic closing member 20 to prevent sound leakage and oil leakage from the gap W1. A seal rubber 21 is provided as the elastic blocking member 20 at the upper end of each side wall 141a to 141d of the oil barrier 14 (see FIGS. 4 and 5).

The seal rubber 21 is an elongated member having a mounting portion 211 that sandwiches the side wall 141 and a contact portion 212 that protrudes from the mounting portion 211 and has a substantially hollow triangular cross section. The contact of the portion 212 with the frame 11 can seal the gap between the frame 11 and the oil barrier 14 (see FIGS. 4 and 5).

Specifically, the contact portions 212 of the seal rubbers 21 attached to the two side walls 141c and 141d in the longitudinal direction (front-rear direction) of the oil barrier 14 shown in FIG. 112 and the horizontal member 113) (the seal rubber 21 attached to the front side wall 141d contacts the lower surface of the end plate 112, and the seal rubber 21 attached to the rear side wall 141c The seal rubbers 21 attached to the two side walls 141a and 141b in the lateral direction (horizontal direction) of the oil barrier shown in FIG. The portion 212 is in contact with the inner surfaces of the two side walls 111a and 111b in the lateral direction of the frame 11 so as to be pressed against each other. be stopped.

In the oil-proof structure of the present invention, not only the leaked oil generated in the soundproof case 2a but also the rainwater that has entered the soundproof case 2a is collected in the oil-proof dike 14. FIG. Therefore, as in the present embodiment in which seal rubbers 21 are provided on the upper ends of the side walls 141a to 141d of the oil barrier 14, the oil barrier structure of the present invention has the elastic blocking member 20 as the frame 11. It is also suitable to dispose in the gap W1 between the upper edges of the oil barrier 14 .

In addition, in the oil-proof structure of the present invention, as a structure for sealing the gap W1 generated between the frame 11 and the oil-proof dike 14, in addition to the above-described embodiments, for example, FIGS. As shown, the frame 11 and the oil dike 14 are separated from each other by a guide plate 16 projecting from each of the side walls 111a to 111d of the frame 11 over the opening of the oil dike. The seal rubber 21 is attached to the guide plate 16 to cover the gap W1 created between them, and the contact portion 212 of the seal rubber 21 is brought into contact with the upper end portion of the side wall 141 of the oil barrier 14. good.

In the above-described oil-proof structure, the elastic closing member 20 is inserted into the gap W2 formed between the guide plate 16 and the oil-proof dike 14, which communicates with the gap W1 formed between the frame 11 and the oil-proof dike 14. By arranging, the gap W1 generated between the frame 11 and the oil dike 14 is sealed. As another example of this form, as shown in FIG. A seal rubber 21 is attached to the upper end of one side wall 141b of the two side walls 141a and 141b in the lateral direction (horizontal direction) of 14, and a contact portion 212 of the seal rubber 21 is attached to the side wall of the oil barrier 14. The upper end of the other side wall 141a is bent in the horizontal direction and the upper surface of the upper bent portion is adhered to the lower surface of the guide plate 16 (an elastic closing member 22). 20).

In the example of FIG. 8 described above, urethane 22, which may deteriorate due to rubbing and is water-permeable, is used as the elastic closing member 20. By arranging between the lower surface and the upper end surface of the side wall 141 of the oil barrier 14, the urethane 22 does not come into contact with other members when the frame 11 is lifted by a crane or the like to remove the oil barrier 14. Since there is no rubbing, there is no risk of damage or deterioration due to rubbing, and the guide plate 16 prevents leaked oil from entering the gap W1.

Incidentally, in the example shown in FIG. The urethane 22 is arranged between the upper end surfaces, but the two side walls in the short direction (left and right direction) and the two side walls in the longitudinal direction (front and back direction) of the oil barrier 14 have the same configuration. It is good as Moreover, the upper end face of the side wall 141 of the oil barrier 14 is not limited to the bent one as described above, and the urethane 22 is adhered to the upper end face of the side wall 141 of the oil barrier 14. can be

Next, a second embodiment of the invention will be described.

In the following description, the oil-proof structure of this embodiment will be described with a focus on the differences from the above-described first embodiment, and the description of the same parts will be omitted. In addition, the same reference numerals are assigned to portions corresponding to those of the first embodiment.

In this embodiment, the shielding plate 30, which is a rectangular flat plate in plan view, has communication holes 31 penetrating through the front and back at the four corners and has raised portions 32 formed on the four sides of the outer peripheral edge. It is provided so as to cover the upper surface of 14 (see FIG. 9).

The shielding plate 30 functions as a catcher for oils and fats that have leaked from the components inside the soundproof box 2 and prevents the leaked oil from scattering. can be done.

The shielding plate 30 of this embodiment does not cover the entire surface of the top opening of the oil barrier 14, but rather covers at least the communication port 13 of the frame 11 in the opening 142 of the top surface of the oil barrier 14. It covers the range.

In the oil-proof structure of this embodiment, as shown in FIG. urethane 22 (elastic closing member 20) adhered to the lower surface of the upper surface (the end plate 112 and the horizontal member 113) of (the upper end of the front rising portion 32d is the lower surface of the end plate 112 , and the upper end of the rear raised portion 32d abuts on the urethane 22 adhered to the lower surface of the horizontal member 113). As shown, the contact portion 212 of the seal rubber 21 (elastic closing member 20) attached to two raised portions (side wall portions) 32a and 32b in the lateral direction (lateral direction) of the shielding plate 30 is It abuts against the inner surfaces of the two longitudinal side walls 111a and 111b of the frame 11 so as to be pressed.

As described above, in the oil-proof structure of this embodiment, the gap W3 formed between the frame 11 and the raised portion 32, which communicates with the gap W1 formed between the frame 11 and the oil barrier 14, By arranging the elastic blocking member 20, the gap W1 generated between the frame 11 and the oil barrier 14 is sealed.

Therefore, the oil-proof structure of the present embodiment prevents sound leakage and oil leakage from the gap W1 formed between the frame 11 and the oil-proof dike 14. FIG.

In this embodiment, the urethane 22, which may deteriorate due to rubbing and is water-permeable, is used as the elastic closing member 20. (In FIG. 10, the end plate 112 and the horizontal member 113) are arranged between the lower surface and the upper end surface of the raised portion 32 of the shield plate 30, so that the frame frame can be removed by a crane or the like in order to remove the oil barrier 14. 11, the urethane 22 does not contact and rub against other members, so there is no risk of damage or deterioration due to rubbing. ing.

In addition, in the present embodiment, in the two rising portions 32c and 32d in the longitudinal direction (front-rear direction) of the shielding plate 30, urethane 22 is formed between the lower surface of the upper surface portion of the frame 11 and the upper end surface of the rising portion 32. However, the two rising portions 32a and 32b in the lateral direction (horizontal direction) of the shielding plate 30 may also have the same configuration.

In the oil-proof structure of this embodiment, as described above, the shielding plate 30 functioning as a receiver for leaked oil generated in the soundproof box 2 is positioned at least at the communication port of the frame 11 at the top opening of the oil-proof dike 14. 13 so as to cover the range of 13, it is possible to reduce the scattering of leaked oil. It is possible to solve the problem of splashing into the gap W1 by hitting the tank 40 and bouncing.

A third embodiment of the present invention will be described.

In the following description, the oil-proof structure of this embodiment will be described with a focus on the differences from the above-described second embodiment, and the description of the same parts will be omitted. Also, the same reference numerals are assigned to portions corresponding to those of the first and second embodiments.

In this embodiment, as shown in FIGS. 12 and 13, the shielding plate 30 described above is configured to cover the entire opening 142 on the upper surface of the oil barrier 14, and the shielding plate Seal rubbers 21 (elastic closing members 20) are attached to raised portions 32a to 32d on four sides of the outer periphery of 30. As shown in FIG.

In the oil-proof structure of this embodiment, the seal rubbers 21 attached to the raised portions 32a to 32d are in contact with the inner surfaces of the side walls 111a to 111d of the frame 11 so as to be pressed.

In other words, the oil-proof structure of this embodiment is formed between the frame 11 and the raised portion 32 of the shield plate 30, which communicates with the gap W1 formed between the frame 11 and the oil-block 14. By arranging the elastic closing member 20 in the gap W3, the gap W1 generated between the frame 11 and the oil barrier 14 is sealed.

Further, in the oil-proof structure of this embodiment, the shield plate 30 covers the entire opening 142 on the top surface of the oil barrier 14, so the opening 142 on the top surface of the oil barrier 14 is not Since the gap W1 between the frame frame 11 and the oil dike 14 is sealed along the entire circumference, even if the oil dike 14 is full of liquid, , there is no danger that the liquid in the oil dike 14 will overflow and flow out of the machine through the gap W1 between the frame 11 and the oil dike 14 during transportation of the work machine, and therefore, an oil leakage accident will occur. can be effectively prevented.

Further, in this embodiment, the shielding plate 30 is arranged so as to separate the oil barrier 14 in which the fuel tank 40 is housed from the main body of the work machine, the engine, etc. Therefore, the shielding plate 30 is made of metal or If it is made of a noncombustible material such as ceramic, it can also serve as a fire prevention measure.

The elastic closing member 20 used in the present invention uses the seal rubber 21, urethane 22, etc. as described above. The seal rubber 21 is suitable in that it has liquid tightness.

Further, the shape of the seal rubber 21 is not limited to that used in the above-described embodiment, and any shape that can seal the gap can be used without problems. It may be an elongated member in which an abutting portion 212 having a hollow substantially circular cross-sectional shape protrudes from a mounting portion 211 that holds the side wall 141 of the embankment 14 or the upper end portion of the raised portion 32 of the shielding plate. .

1 work machine 2 soundproof box 2a soundproof case 10 frame 11 frame 111 side wall (of frame)
111a, 111b side walls (of the frame) in the lateral direction (horizontal direction)
111c, 111d Longitudinal (back and forth) side walls (of frame)
112 end plate 113, 114 horizontal member 117 (117a to 117c) flange 12 opening 13 communication port 14 oil dike 141 side wall (of oil dike)
141a, 141b Lateral direction (left and right direction) side walls (of oil dikes)
141c, 141d Longitudinal (longitudinal) side walls (of dikes)
142 opening 16 guide plate 20 elastic closing member 21 seal rubber 211 attachment portion 212 contact portion 22 urethane 30 shielding plate 31 communication hole 32 raised portion 32a, 32b raised portion in the lateral direction (lateral direction) 32c, 32d longitudinal direction (Fore-and-aft direction) raised portion 40 fuel tank 60 working machine 61 soundproof box 62 soundproof case
63 Frame 64 Frame frame 65 Oil barrier 66 Opening 67 Communication port 68 Fuel tank 70 Working machine 71 Soundproof box 72 Soundproof case 73 Frame 74 Frame frame 75 Oil barrier 76 Opening 77 Communication port 78 Guide plate 80 Working machine 83 Base 84 Leakage Material storage tank 85 Water receiving gutter 86 Guide plate 87 Elastic closing member 88 Fuel tank
N Noise O Oil leakage W1 Gap (between frame frame and oil dike) W2 (between guide plate and oil dike) Gap W3 (between frame frame and raised part of shield plate)

Claims (8)

In a work machine equipped with a frame that serves as a base on which components are placed and a soundproof box that is made up of a soundproof case that covers the frame,
The frame is composed of a frame that serves as an outer frame of the frame and a bottomed frame-type oil barrier that is housed in the frame and opens upward,
An opening is provided in the bottom surface of the frame so that the oil barrier can be inserted into and removed from the frame, and the upper surface of the frame has a space within the soundproof case and a space within the oil barrier. A communication port is provided to communicate with the soundproof case so that the leaked oil generated in the soundproof case can fall into the oil barrier,
An oil-proof structure for a work machine, wherein an elastic closing member is arranged in a gap between the frame and the oil-proof dike to seal the gap. The upper part of the gap is covered by a guide plate protruding downward from the side wall of the frame over the opening of the oil barrier,
2. The oil protection for a working machine according to claim 1, wherein said gap is sealed by arranging said elastic closing member in a gap between said guide plate and said oil protection dike that communicates with said gap. structure. 3. The gap is sealed by disposing the elastic closing member between the lower surface of the guide plate and the upper end surface of the side wall of the oil barrier in the gap communicating with the gap. 2. The oil-proof structure of the working machine according to 2 above. A flat plate-shaped shielding plate is provided on the upper surface of the oil dike and covers at least the range of the communication port of the opening on the upper surface of the oil dike, and the shielding plate has a hole penetrating from the front and back to prevent oil leakage. into the oil barrier, and a rising portion is formed along the outer peripheral edge of the shield plate,
2. The operation according to claim 1, wherein said gap is sealed by arranging said elastic closing member in the gap between said raised portion of said frame and said shielding plate communicating with said gap. Machine oil-proof structure. In the gap communicating with the gap, the gap is sealed by disposing the elastic closing member between the lower surface of the upper surface portion of the frame and the upper end surface of the rising portion. Item 5. An oil-proof structure for a work machine according to item 4. 6. An oil-proof structure for a working machine according to claim 4, wherein said shielding plate is constructed so as to cover the entire upper opening of said oil-proof dike. 7. An oil-proof structure for a working machine according to claim 4, wherein said shielding plate is made of a noncombustible material, and a fuel tank is accommodated in said oil-proof dike. An oil-proof structure for a working machine according to any one of claims 1 to 7, characterized in that said elastic closing member is liquid-tight.

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