Electronic device support structure and construction machine equipped with the electronic device support structure

Abstract

To provide an electronic device support structure which secures heat discharge property of an electronic device mounted on a construction machine, and a construction machine having the electronic device support structure.SOLUTION: An electronic device support structure includes a housing 21 which is arranged so as to have a space between a lower structure and the housing at the rear part of a sheet provided on a cockpit 2 of a construction machine and stores an electronic device, wherein in the housing 21, one or more side wall parts 29 of the housing 21, and a lower wall part 22 of the housing 21 each has any one selected from each of a vent hole 43 and a fan 42.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an electronic device support structure that supports an electronic device on a construction machine, and to a construction machine equipped with the electronic device support structure. Regarding. [Background technology]

[0002] In recent years, as shown in Patent Document 1, an invention has been made relating to a remote control device for remotely controlling vehicles such as construction machinery. In such remote control, an operator remotely controls the construction machinery while viewing images of the surroundings of the construction machinery transmitted from the construction machinery. Data such as images of the surroundings of the construction machinery, operation status data of the construction machinery, and operation signals from the remote control device are transmitted and received wirelessly between the remotely controlled construction machinery and the remote control device operated by the operator, thereby remotely controlling the construction machinery.

[0003] Remotely operated construction machinery is fitted with an electronic device for remote control communication. In the construction machinery shown in Patent Document 2, the electronic device is retrofitted behind the operator's seat so as not to interfere with the operator's operation, taking into consideration that an operator will still be on board and operate the construction machinery even after the electronic device is installed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-150931 [Patent Document 2] Japanese Patent Publication No. 2020-084651 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the space between the seat in the driver's cab and the wall behind the seat is very limited, making it difficult to install electronic devices while ensuring that they can dissipate heat generated by the devices during operation.

[0006] The present invention has been made to solve the above-mentioned problems, and aims to provide an electronic device support structure that ensures heat dissipation for electronic devices installed in construction machinery, and a construction machinery equipped with such an electronic device support structure. [Means for solving the problem]

[0007] The electronic device support structure of the present invention is arranged behind a seat provided in the operator's cabin of a construction machine so as to have a space between it and the lower structure, and comprises a housing that houses electronic devices, and one or more side wall portions and a bottom wall portion of the housing each have one selected from an air vent and a fan.

[0008] In the electronic device support structure of the present invention, a housing for accommodating an electronic device is arranged so as to have a space between it and a lower structure, and one or more side walls and a lower wall of the housing each have either a vent or a fan. Because of this space between the lower wall and the lower structure, air passing through the vent or fan in the lower wall is not obstructed by the lower structure facing the lower wall, allowing efficient ventilation between the inside and outside of the housing with little fluid resistance. Therefore, the electronic device support structure of the present invention can ensure the dissipation of heat generated by the electronic device.

[0009] The electronic device support structure of the present invention comprises a housing arranged behind a seat provided in the operator's cabin of a construction machine, within which a first group of electronic devices and a second group of electronic devices are arranged with a horizontal gap between them, and either an air vent or a fan is provided at the portion of one of the walls of the housing facing the gap, and either the air vent or the fan is provided on the first wall of the housing adjacent to the first group of electronic devices, and on the second wall of the housing adjacent to the second group of electronic devices.

[0010] In the electronic device support structure of the present invention, the first electronic device group and the second electronic device group are arranged with a horizontal gap between them, and either a vent or a fan is provided in a portion of one of the walls of the housing facing the gap. Therefore, the electronic device support structure of the present invention allows efficient ventilation between the inside and outside of the housing with little fluid resistance. Therefore, the electronic device support structure of the present invention can ensure the dissipation of heat generated by the electronic devices.

[0011] Within the housing of the electronic device support structure of the present invention, a first group of electronic devices and a second group of electronic devices are arranged with a horizontal gap between them, and either an air vent or a fan is provided at the portion of one of the wall portions of the housing facing the gap, and either the other is provided on the first wall portion of the housing adjacent to the first group of electronic devices and on the second wall portion of the housing adjacent to the second group of electronic devices.

[0012] In the electronic device support structure of the present invention, the first electronic device group and the second electronic device group are arranged with a horizontal gap between them, and either a vent or a fan is provided in a portion of one of the walls of the housing facing the gap, thereby enabling efficient ventilation between the inside and outside of the housing with little fluid resistance.

[0013] The vents of the electronic device support structure of the present invention are provided in the left and right wall portions, respectively, and one fan is provided in the central region of the wall portion including the portion facing the gap.

[0014] In the electronic device support structure of the present invention, the fan and the vent are respectively provided on different wall portions with their surfaces angled relative to each other. This reduces the possibility that high-temperature air discharged from either the fan or the vent will be re-inhaled from the other, reducing the cooling efficiency. Therefore, the electronic device support structure of the present invention can efficiently cool electronic devices.

[0015] The housing of the electronic device support structure of the present invention has an airflow adjusting member that defines a path for air to flow inside the housing and guides the air to the ventilation opening.

[0016] The housing of the electronic device support structure of the present invention has an airflow adjusting member, which allows air to flow efficiently within the housing, thereby enabling the electronic device support structure of the present invention to efficiently cool the electronic device.

[0017] The housing of the electronic device support structure of the present invention has an openable / closable opening / closable portion on the front wall.

[0018] The opening / closing portion of the front wall of the housing in the electronic device support structure of the present invention can be opened and closed while the housing is attached. This allows maintenance workers to view the inside of the housing and check the status of the electronic device without removing the housing from the construction machine. Therefore, the electronic device support structure of the present invention makes it easy to perform maintenance on electronic devices.

[0019] The housing of the electronic device support structure of the present invention has a step on the top or bottom surface of the housing.

[0020] The housing of the electronic device support structure of the present invention has a step on the top or bottom surface of the housing. Therefore, the housing has portions with different outer and inner dimensions. Therefore, a large electronic device can be housed in a portion with a larger inner dimension within the housing. Furthermore, by providing a portion with a smaller outer dimension, the space occupied by the housing can be minimized even while having a portion with a larger inner dimension.

[0021] The housing of the electronic device support structure of the present invention includes a mounting portion therein on which an electronic device is mounted.

[0022] The housing of the electronic device support structure of the present invention includes a mounting section within the housing, which allows multiple electronic devices of different sizes to be fixed at appropriate intervals within the space within the housing, ensuring an efficient airflow path within the housing.

[0023] The construction machine of the present invention is a construction machine equipped with the electronic device support structure described above, and the electronic device is a remote-controlled electronic device.

[0024] When a remote control electronic device is attached to the construction machine of the present invention, the electronic device support structure described above allows the remote control electronic device to be attached while ensuring heat dissipation. [Brief explanation of the drawings]

[0025] [Figure 1] FIG. 2 is a perspective view of a cockpit according to the embodiment. [Figure 2] FIG. 2 is a left side view of the cockpit of FIG. 1. [Figure 3] FIG. 2 is a top view of the cockpit of FIG. 1. [Figure 4] 1 is a front view of an electronic device housing module according to an embodiment of the present invention; [Figure 5] 5 is a perspective view of a housing of the electronic device housing module of FIG. 4. FIG. [Figure 6] 5 is a perspective view of a fixing element included in the electronic device housing module of FIG. 4. FIG. [Figure 7] 5 is a partial enlarged view of part A showing the airflow adjustment member of FIG. 4. FIG. [Figure 8] 5 is a front view showing a state in which the front wall of the housing of FIG. 4 is omitted. DETAILED DESCRIPTION OF THE INVENTION

[0026] With reference to the drawings, an embodiment of an electronic device support structure and a construction machine equipped with the electronic device support structure according to the present invention will be described. The construction machine is equipped with an electronic device for remote operation, and can be remotely operated by an operator without a person on board the actual machine. The construction machine is configured to be able to communicate with a remote operation support server and a remote operation device via a network. Note that the remote operation support server and the remote operation device operated by the operator, including their configurations, are not shown in the drawings.

[0027] The remote operation support server is connected between the construction machine and the remote operation device, and is a device that performs arithmetic processing for remotely operating the construction machine. The remote operation support server is equipped with an arithmetic processing unit and a storage device including a database. The arithmetic processing unit reads the necessary data and software from the storage device, and performs arithmetic processing on the data in accordance with the software.

[0028] A remote control device is a device that an operator rides on to remotely control a construction machine. The remote control device is equipped with a remote control device, a remote input interface, and a remote output interface. The remote control device is equipped with an arithmetic processing unit and a memory device, and performs arithmetic processing related to operation inputs to the remote control device and signal outputs including images from the construction machine. The remote input interface is equipped with a remote control mechanism that is operated by the operator. The remote output interface is equipped with a remote image output device and a remote audio output device that are recognized by the operator, as well as remote wireless communication equipment that transmits and receives data. The operator remotely controls the construction machine by operating various levers provided on the remote control mechanism while recognizing images and sounds around the construction machine output from the remote control device.

[0029] A cab 1 of a construction machine will be described with reference to Figures 1 to 3. While the entire construction machine is not shown, the present invention can be applied to any type of construction machine as long as it has a cab with a seat-rear space behind the seat. Examples of construction machines include crawler excavators. The present invention can also be applied to various types of construction machines, such as cranes, hydraulic breakers, nibblers, and demolition machines. The construction machine includes a crawler-type undercarriage and an upper rotating body rotatably mounted on the undercarriage. A working mechanism including a boom, arm, and bucket is provided at the front center of the upper rotating body. The cab 1 is also provided at the front left side of the upper rotating body. The construction machine is equipped with electronic devices for remote control, allowing a driver to board and operate the machine remotely. In the following description, the front-rear, left-right, and up-down directions of each component and member refer to the same directions as those of the operator's cabin 2.

[0030] Fig. 1 is a perspective view showing a cockpit 2 with the left side of the cab 1 omitted. Fig. 2 is a left side view of the cockpit 2 in Fig. 1. Fig. 3 is a top view of the cockpit 2 in Fig. 1 with the roof omitted.

[0031] The cab 1 is disposed on the frame of the upper rotating body. The cab 1 is formed into a box shape as a whole by combining multiple plate-like members. The cab 1 has a floor 3, a front section 4 of the cockpit, a rear section 5 of the cockpit, a left section 6 of the cockpit, a right section 7 of the cockpit, and a roof 8. A door (not shown) is provided in the left section 6 of the cockpit to allow the operator to get on and off the construction machine. In FIG. 1 , the left section 6 of the cockpit of the cab 1 is omitted to make it easier to understand the interior of the cockpit 2. In addition, one or more windows 9 are provided in each of the front section 4 of the cockpit, the rear section 5 of the cockpit, the left section 6 of the cockpit, and the right section 7 of the cockpit. The window 9 provided in the rear section 5 of the cockpit not only allows the operator to see behind the cockpit 2 but also serves as an emergency escape exit for the operator to escape from the cockpit 2 in the event of an emergency, such as if the construction machine overturns.

[0032] The cab 1 is provided with a seat 11, which is located approximately in the center of the cab 1 in the left-right direction and slightly rearward in the front-to-rear direction. The seat 11 is used by an operator to operate a construction machine configured to be remotely controlled. The seat 11 has a seat portion 12, a backrest portion 13, and armrests 14, 14 provided on the left and right sides of the seat portion 12. The backrest portion 13 can be angle-adjusted within a predetermined range, both forward and backward from an upright position, with the backrest portion 13 being centered on the lower end portion of the backrest portion 13 connected to the seat portion 12. For example, the backrest portion 13 can be tilted backward from an upright position to allow the operator to assume a position that is comfortable for driving. The backrest portion 13 can also be tilted forward from an upright position to facilitate maintenance on and removal of equipment or structures behind the seat 11.

[0033] Operating levers 15, 15 are provided in front of the left and right armrests 14, 14, respectively. The operating levers 15, 15 are used to perform various operations on the construction machine, such as rotating the upper rotating body, operating the boom, operating the arm, operating the bucket, etc. In addition, travel levers 16 corresponding to the left and right crawlers are provided in front of the seat 11. When riding on the vehicle, the operator operates these control devices to operate the construction machinery.

[0034] A behind-seat space 17 is formed between the seat 11 and a rear structure disposed behind the seat 11. The rear structure disposed behind the seat 11 is, for example, the rear section 5 of the operator's cabin, which constitutes the interior and exterior walls of the cab 1. Alternatively, depending on the construction machine, if a wall-like structure is disposed behind the seat 11 in addition to the rear section 5 of the operator's cabin, that structure may also be the rear structure. The rear structure may form the behind-seat space 17 between the seat 11 and above a lower structure, which will be described later. An electronic device housing module 20, which houses electronic devices for remotely operating the construction machine, is provided in the behind-seat space 17.

[0035] In the space 17 behind the seats, a structure 19 is disposed on the floor 3. Furthermore, a fuse box 18 is disposed on the structure 19. The lower structures include the fuse box 18, the structure 19, the floor 3, etc. The lower structures are structures located below a housing 21 installed in the space 17 behind the seats, and are objects on which the housing 21 is supported with a space above them. The housing 21 is supported so that its upper surface is at the same height as or lower than the lower end of the window 9.

[0036] The electronic device accommodating module 20 will be described with reference to Figs. 4 to 6. Fig. 4 is a front view of the electronic device accommodating module 20. Fig. 5 is a perspective view of the housing 21 of the electronic device accommodating module 20. Note that Fig. 5 does not show the top and front of the housing 21 or the housed electronic devices. Fig. 6 is a perspective view of a fixing element 50 of the electronic device accommodating module 20.

[0037] The electronic device storage module 20 includes a housing 21 that stores electronic devices and a fixing element 50 for supporting the housing 21 in the seat rear space 17 between the seat 11 and the rear structure, with a space between the housing 21 and the lower structure present below.

[0038] The housing 21 is a box-shaped member made of multiple plate-like members, and is provided to prevent dust and the like from entering the inside of the housing 21 by separating the inside and outside of the housing 21 with these plate-like members. The housing 21 is formed into a substantially rectangular parallelepiped shape by a lower wall portion 22, an upper wall portion 23, and multiple side wall portions 29, and the side wall portions 29 have a first wall portion, a second wall portion, a third wall portion, and a fourth wall portion. The housing 21 is disposed in the seat rear space 17, with the longitudinal direction of the housing 21 aligned with the left-right direction of the cockpit 2. Fixing elements 50 are connected to the lower and rear sides of the housing 21. Furthermore, an imaging device 10 for capturing images of the area in front of the cockpit 2 is disposed on the upper side of the housing 21.

[0039] The housing 21 has a lower wall portion 22 that defines the lower side of the housing 21, an upper front wall portion 28 that defines the upper and front sides, a rear wall portion 24 that defines the rear side, a left wall portion 25 that defines the left side, and a right wall portion 26 that defines the right side. The first to fourth wall portions described above correspond to any of the front, rear, left, and right side walls 29. For example, the first wall portion may be the left wall portion 25, the second wall portion may be the right wall portion 26, the third wall portion may be the front wall portion 27 of the upper front wall portion 28, and the fourth wall portion may be the rear wall portion 24. Alternatively, the first wall portion may be the left wall portion 25, the second wall portion may be the front wall portion 27, the third wall portion may be the right wall portion 26, and the fourth wall portion may be the rear wall portion 24. Alternatively, the first wall may be the left wall 25, the second wall may be the rear wall 24, the third wall may be the right wall 26, and the fourth wall may be the front wall 27.

[0040] The lower wall portion 22 will be described with reference to FIGS. 4 and 5. Upper ends of fixing elements 50 are fixed to the left and right ends of the lower surface of the lower wall portion 22, respectively. A step portion 31 is provided on the left side of a central region between the left and right ends of the lower wall portion 22. The lower wall portion 22 has an upper plate portion 32 on the right side and a lower plate portion 33 on the left side, with the step portion 31 as a boundary. The upper plate portion 32 and the lower plate portion 33 are each plate-shaped members. The upper and lower surfaces of the upper plate portion 32 and the lower plate portion 33 are parallel to each other, and the upper plate portion 32 is provided at a higher position than the lower plate portion 33. Due to the above structure, the lower surface (outside of the housing 21) and the upper surface (inside of the housing 21) of the lower wall portion 22 each have a step.

[0041] Because the upper plate portion 32 of the lower wall portion 22 is formed higher than the lower plate portion 33, a space equivalent to the raised volume of the lower wall portion 22 of the housing 21 is provided in the portion where the lower wall portion 22 is raised by the upper plate portion 32 of the housing 21, compared to when the lower wall portion 22 is formed only by the lower plate portion 33. A fuse box 18 of a construction machine is provided below the housing 21. As is well known, inspection and replacement of fuses are performed as maintenance work. The electronic device support structure of the present invention can be structured to allow a maintenance worker to easily reach under the housing 21. Therefore, the electronic device support structure of the present invention can ensure high maintainability.

[0042] Because the lower plate portion 33 of the lower wall portion 22 is formed lower than the upper plate portion 32, the height of a portion of the upper surface of the lower wall portion 22 on the interior side of the housing 21 can be formed lower than the upper plate portion 32, thereby increasing the internal space of the housing 21. Furthermore, because the vertical dimension of the interior of the housing 21 can be increased, the degree of freedom in layout of electronic devices in the vertically wide portion of the internal space of the housing 21 can be increased. For example, it is possible to ensure the storage dimensions for a PC with a relatively large height, and it is also possible to easily attach and detach the PC as needed. Furthermore, it is possible to more easily maintain electronic devices placed inside the housing 21. Therefore, the electronic device support structure of the present invention can increase the degree of freedom in layout of electronic devices in the internal space of the housing 21, ensuring high maintainability.

[0043] The lower wall 22 is provided with a fan 42 that blows air in a central region between the left and right ends of the lower wall 22 and at the left end of the upper plate 32. The fan 42 draws air from the space below the upper plate 32, which is outside the housing 21, into the interior of the housing 21. A filter is provided on the fan 42. Note that the rotation direction of the motor of the fan 42 can also be changed to exhaust air from inside the housing 21 to the space below the upper plate 32, which is outside the housing 21.

[0044] The upper front wall portion 28 will be described with reference to Figures 1 and 4. The upper front wall portion 28 has an upper wall portion 23 and a front wall portion 27. The upper wall portion 23 and the front wall portion 27 are members that define the upper portion (top surface) and the front portion (front surface) of the housing 21, respectively. The upper wall portion 23 and the front wall portion 27 can be formed separately, but in this embodiment, the ends of the upper wall portion 23 and the front wall portion 27 are connected to each other and integrally formed as the upper front wall portion 28. An imaging device 10 is installed on the upper front wall portion 28. The imaging device 10 captures images of the area in front of the cockpit 2 from within the cockpit 2. Images captured by the imaging device 10 are transmitted to a remote control device. An operator remotely controls the construction machine while viewing images received and displayed by the remote control device. Therefore, to make it easier for the operator to see ahead, the imaging device 10 is installed on top of and in the center of the upper wall portion 23 so that the height of the lens of the imaging device 10 is approximately the same as the eye height of the seated operator.

[0045] The front wall 27 has a first front wall 35 provided in the upper half and a second front wall 36 provided in the lower half. The first front wall 35 and the second front wall 36 have the same left-right dimensions and are formed of rectangular plate-like members with long sides that are approximately equal to the left-right dimensions of the housing 21. The first front wall 35 and the second front wall 36 are attached to the housing 21 with the front long side of the upper wall 23 connected to the upper long side of the first front wall 35, with their outer surfaces at a predetermined angle to each other.

[0046] The integrally formed upper front wall portion 28 is fixed to the left wall portion 25 and the right wall portion 26 by fastening holes and bolts (not shown) that are provided in multiple locations on the left and right ends of the upper front wall portion 28. The upper front wall portion 28 can be removed from the housing 21 by loosening the bolts. Because the upper front wall portion 28, which closes the top and front sides of the housing 21, is integrally formed, the top and front sides of the housing 21 can be opened at the same time by removing only the upper front wall portion 28, which is a single member. This makes it easy to view the inside of the housing 21 and perform maintenance.

[0047] The upper front wall 28 is attached to the housing 21 with the outer surface of the second front wall 36 facing slightly upward from the vertical. The predetermined angle between the upper wall 23 and the first front wall 35 is in the range of 100° to 140°, e.g., 120°. The predetermined angle between the first front wall 35 and the second front wall 36 is in the range of 130° to 170°, e.g., 150°. These predetermined angles are determined appropriately depending on the shape and size of the backrest 13 of the seat 11, the shape and size of the space behind the seat 17, and the like. Because the first front wall 35 is formed as an inclined surface at an angle with respect to the vertical, when the backrest 13 of the seat 11 is reclined backward, the angle at which the backrest 13 can be reclined without interfering with the housing 21 can be increased compared to when the first front wall 35 is not formed as an inclined surface. Therefore, the operator riding on the construction machine can adjust the angle of the backrest 13 to an optimum operating position.

[0048] An opening / closing section 37 is provided on the first front wall 35. The opening / closing section 37 is a member that easily opens a portion of the first front wall 35. The opening / closing section 37 has a hinge 38 and an opening / closing plate 39 that is held open and closed by the hinge 38. The hinge 38 is fixed to a portion of the first front wall 35 adjacent to the left side of the inspection hatch 41, in which the inspection hatch 41 is provided. By opening the opening / closing plate 39, a maintenance worker can easily see lamps and the like that indicate the signal transmission / reception status of electronic devices located near the inspection hatch 41 inside the housing 21. Therefore, the provision of the opening / closing section 37 makes it easier to perform maintenance work on the housing 21.

[0049] The left wall portion 25 and the right wall portion 26 will now be described with reference to FIGS. 4 and 5. The left wall portion 25 and the right wall portion 26, which are located on the left and right sides of the housing 21, respectively, are formed symmetrically with respect to the center of the housing 21 in the left-right direction. They are fixed to the left end portion or right end portion of the lower wall portion 22, the upper front wall portion 28, and the rear wall portion 24 by fixing members (not shown). The left wall portion 25 and the right wall portion 26 each have an opening for a vent 43 in the lower end region and the central region in the front-rear direction of the left wall portion 25 and the right wall portion 26. The opening of the vent 43 is a rectangular hole that is elongated in the front-rear direction, and its length in the front-rear direction is formed to be approximately one-third of the length of the left wall portion 25 and the right wall portion 26.

[0050] With reference to FIG. 7, the airflow adjustment members 45 provided on the housing 21 and on the inner surfaces of the left wall portion 25 and the right wall portion 26 will be described. FIG. 7 is a partial enlarged view of portion A in FIG. 4. The ventilation holes 43 are openings and are provided in the left wall portion 25 and the right wall portion 26. The airflow adjustment members 45 are provided on the inner surfaces of the left wall portion 25 and the right wall portion 26 so as to cover the ventilation holes 43. The airflow adjustment members 45 are members that reduce the intrusion of dust, foreign matter, etc. from the outside of the housing 21 into the inside through the ventilation holes 43, and allow air to flow efficiently to the ventilation holes 43. The airflow adjustment members 45 are members with a U-shaped cross section that are formed by bending a plate member. The airflow adjustment member 45 is fixed to the inner surface of the left wall portion 25 and the right wall portion 26, respectively, and the airflow adjustment member 45, which has a U-shaped cross section, and the inner surface of the left wall portion 25 or the right wall portion 26 form an air flow path through which air flows in the vertical direction.

[0051] The inner front-rear dimension of the airflow adjustment member 45 is formed to be equal to or greater than the front-rear dimension of the ventilation opening 43. The inner front-rear dimension of the airflow adjustment member 45 is one to two times the front-rear dimension of the ventilation opening 43, for example, the same dimension. The vertical dimension of the airflow adjustment member 45 is two to four times the vertical dimension of the ventilation opening 43, for example, three times. Therefore, the airflow adjustment member 45 covers the entire ventilation opening 43 on the inner surfaces of the left wall portion 25 and the right wall portion 26.

[0052] The airflow adjustment member 45 has an upper portion 46, an intermediate portion 47, and a lower portion 48, which are integrally formed. The upper portion 46 is a member that is open at the top and communicates with the interior of the housing 21. The intermediate portion 47 is connected to the upper portion 46, does not communicate with the interior of the housing 21, and forms a flow path with the inner surfaces of the left wall portion 25 and the right wall portion 26. The lower portion 48 is a member that is connected to the intermediate portion 47, has an open bottom, and communicates with the interior of the housing 21. The lower portion 48 is provided on the inner surfaces of the left wall portion 25 and the right wall portion 26, respectively, in a side view of the housing 21, at positions that at least partially overlap the ventilation openings 43, and the air flow path inside the lower portion 48 communicates with the outside of the housing 21 via the ventilation openings 43.

[0053] The rear wall 24 will be described with reference to Fig. 5. The rear wall 24 is a member that closes the rear surface of the housing 21. Two remote control controllers 89, 89 are fixed side by side to the rear surface of the rear wall 24, each in contact with the rear wall 24. Note that the controllers 89 may be disposed in a different location, and a housing fixing member, which will be described later, may be fixed directly to the rear wall 24.

[0054] The fixing element 50 will be described with reference to Figures 4 and 6. The fixing element 50 has a housing fixing portion 51 that fixes the housing 21 to the cockpit rear portion 5, which is the rear structure, and holds the housing 21 from the side, and legs 65 that hold the housing 21 from below.

[0055] The housing fixing portion 51 has a first member 52, a second member 53, and a third member 54. The first member 52 is fixed in close contact with the rear surfaces of the controllers 89, 89 fixed to the rear wall portion 24 of the housing 21, and is a member to which the second member 53 and the third member 54, which are fixed to the cockpit rear portion 5, which is the rear structure, are connected. The first member 52 is a rectangular member formed from a plate-like member, and the dimensions of the long and short sides of the first member 52 are approximately the same as the dimensions of the long and short sides of the rear wall portion 24. The first member 52 has four screw holes arranged in a horizontal row adjacent to the upper end and the lower end of the first member 52, and is fixed to the rear wall portion 24 with bolts. The upper end of the first member 52 is folded back at a right angle to the surface of the first member 52, forming a first member horizontal portion 55. The controllers 89, 89 do not need to be disposed in contact with the housing 21, and may be fixed to a location away from the housing 21. In this case, the first member 52 is fixed directly to the rear wall portion 24.

[0056] The second member 53 is a member that connects the first member 52 and the cockpit rear section 5, which is the rear structure, above the first member 52. The left-right dimension of the second member 53 is approximately the same as the left-right dimension of the first member 52. The second member 53 is formed by placing a rectangular plate-shaped member with its longitudinal direction aligned with the left-right direction and bending it along a fold line parallel to the left-right direction. The second member 53 has a second member horizontal section 56, a second member inclined section 57, and a second member vertical section 58, in that order from the housing 21 side toward the cockpit rear section 5 side. The second member horizontal section 56 is attached to the first member horizontal section 55 with their faces in contact with each other, and is fixed with bolts and nuts through multiple bolt holes provided in both. The second member vertical section 58 has multiple bolt holes provided therein and is fixed to the cockpit rear section 5, which is the rear structure, with bolts and nuts. The second member inclined portion 57 connects the second member horizontal portion 56 and the second member vertical portion 58 to each other.

[0057] The third member 54 is a member that connects the first member 52 and the cockpit rear section 5, which is the rear structure, below the first member 52. The third member 54 is a rectangular plate-shaped member arranged with its longitudinal direction aligned with the left-right direction and formed by bending it along a fold line parallel to the left-right direction. The third member 54 has a third member front section 61, a third member intermediate section 62 (not shown), and a third member rear section 63, in that order from the housing 21 side toward the cockpit rear section 5 side. The left-right dimension of the third member front section 61 is approximately the same as the left-right dimension of the first member 52. The third member front section 61 is attached to the lower end of the first member 52 with their faces in contact with each other, and is fixed with bolts and nuts through multiple bolt holes provided in both members. In addition to Figures 4 and 6, Figure 2 also shows the third member front section 61, the third member intermediate section 62, and the third member rear section 63.

[0058] The third member rear surface portion 63 has a plurality of bolt holes formed therein and is fixed to the cockpit rear portion 5, which is a rear structure, with bolts and nuts. The third member intermediate portion 62 connects the third member front surface portion 61 and the third member rear surface portion 63 between them. The left-right dimensions of the third member intermediate portion 62 and the third member rear surface portion 63 are approximately half the left-right dimension of the first member 52, and the width direction dimensions smoothly change at the connection portion between the third member front surface portion 61 and the third member intermediate portion 62, and the third member intermediate portion 62 and the third member rear surface portion 63 are connected together. The third member intermediate portion 62 and the third member rear surface portion 63 are positioned so that the left-right positions of the respective right ends of the third member intermediate portion 62 and the third member rear surface portion 63 are approximately aligned with the left-right position of the right end of the first member 52.

[0059] In the above description, the left-right dimensions of the third member intermediate portion 62 and the third member rear surface portion 63 are formed to be approximately half the left-right dimension of the housing 21 due to the constraints of the size of the fixing portions of the cockpit rear section 5, but this may be changed as appropriate. The left-right dimensions of both may be formed to be larger, for example, the left-right dimensions of both may be formed to be approximately the same as the left-right dimension of the first member 52. In this case, the housing 21, which is a heavy object, can be fixed more securely to the cockpit rear section 5, which is the rear structure, so that the fixed state of the housing 21 can be maintained more securely even if repeated vibrations are applied to the housing 21 during operation of the construction machine.

[0060] 4 and 6, the legs 65 will be described. The legs 65 are members that support the underside of the housing 21 so that there is a space between the housing 21 and the structure below. The legs 65 have a fourth member 72 connected to the underside of the housing 21, a fifth member 73 that connects the fourth member 72 and the housing fixing part 51, a sixth member 74 that is connected to the underside of the fourth member 72, and a seventh member 75 whose upper end is connected to the sixth member 74 and that holds the housing 21 at a predetermined height.

[0061] The fourth member 72 has a fourth member horizontal portion 80, fourth member vertical portions 81 provided at both ends of the fourth member horizontal portion 80, and a fourth member fixing portion 82 provided at each end of the fourth member vertical portion 81 opposite the fourth member horizontal portion 80. The fourth member horizontal portion 80 is a plate-like member with a constant front-to-rear dimension and a left-to-right dimension approximately the same as that of the housing 21. The two fourth member vertical portions 81 have the same size and shape. In a side view parallel to the left-to-right direction, the fourth member vertical portions 81 are approximately L-shaped members intersecting at approximately 45°. The lower ends of each fourth member vertical portion 81 are fixed to both ends of the fourth member horizontal portion 80. A fourth member fixing portion 82 is connected to the upper end of each fourth member vertical portion 81. The fourth member fixing portion 82 extends perpendicular to the fourth member vertical portion 81 and forms a horizontal flat portion. The fourth member fixing portions 82 are provided with fixing members such as bolts, and are connected to the lower surfaces of both left and right end portions of the lower wall portion 22, respectively.

[0062] A space 101 is provided below the housing 21 adjacent to the lower surface of the housing 21. A fourth member 72 is provided below the housing 21 so as to surround the space 101 below the housing 21. The horizontal area of ​​the space 101 is approximately the same as the horizontal area of ​​the lower surface of the housing 21. Because the space 101 is provided below the housing 21, there are no components adjacent to the fan 42 provided on the bottom wall portion 22. This allows the fan 42 to efficiently draw air into the housing 21 or exhaust air from the housing 21 without being obstructed by other components. Also, as shown in FIG. 2 , a fuse box 18 provided on the construction machine is disposed below the housing 21 across the space 101. The space 101 formed below the housing 21 allows workers to easily perform maintenance on the fuse box 18. The space 101 includes a central region of the lower surface of the housing 21 where the fan 42 is located. The horizontal area of ​​space 101 is at least half the horizontal area of ​​the lower surface of housing 21.

[0063] The fifth member 73 is a plate-like member that connects the fourth member 72 and the housing fixing part 51. One end of the fifth member 73 is connected to each of the fourth member vertical parts 81, and the other end is connected to the left and right ends of the third member 54 at the lower end of the housing fixing part 51.

[0064] The sixth member 74 is a member that is fixed to the underside of the fourth member 72 and holds the seventh member 75. The sixth member 74 is a substantially rectangular plate-like member, and both long side ends are bent at right angles. One of the bent ends of the sixth member 74 is connected to the underside of the fourth member 72, and the sixth member 74 is fixed perpendicular to the fourth member 72.

[0065] The seventh member 75 is fixed to the sixth member 74 and holds the housing 21 at a predetermined height. The seventh member 75 is configured by combining two solid longitudinal members each having a circular cross-sectional outer shape. The seventh member 75 has a seventh member upper portion 76, a seventh member middle portion 77, a seventh member lower portion 78, and a connecting portion 79.

[0066] The seventh member 75 is composed of two identical members. The seventh member upper portion 76 and the seventh member lower portion 78 are formed in a substantially linear shape. The seventh member intermediate portion 77 connecting the two is formed in a substantially U-shape in front view. The periphery of the upper end of the seventh member intermediate portion 77 is bent 90° backward from the seventh member lower portion 78 in side view, and then bent upward again so that the upper end of the seventh member intermediate portion 77 faces upward. The two members of the seventh member 75 are combined so that the U-shaped convex portions of the seventh member intermediate portions 77 approach each other, and a connecting portion 79 connects these portions. Each lower end of the seventh member lower portion 78 is provided with a plate-shaped fixing portion, which is fixed to the floor portion 3 with a bolt. The seventh member 75 may be a hollow cylindrical member instead of a solid member. In this case, it is easier to process than a solid member, and it can be made lighter and less expensive.

[0067] The internal structure of the housing 21 will be described with reference to FIGS. 5 and 8. The housing 21 includes a mounting portion 88 and a fixing plate 87 inside the housing 21 so as to efficiently accommodate electronic devices. The mounting portion 88 is a member that supports the electronic devices and includes first support members 85, 85, second support members 86, 86, and third support members 84, 84. The fixing plate 87 is a plate-like member that supports and fixes one end of the mounting portion 88. The fixing plate 87 fixes one end of each of the second support members 86, 86. The fixing plate 87 is a substantially rectangular plate-like member and is attached vertically to the upper portion 32 of the lower wall 22. The fixing plate 87 is provided parallel to the left wall 25 at a position approximately 2 / 3 to 3 / 4 of the way from the left wall 25 along the left-right dimension of the housing 21.

[0068] The first support members 85, 85, the second support members 86, 86, and the third support members 84, 84 are elongated members that support the electronic device within the housing 21. The first support members 85, 85 and the second support members 86, 86 are, for example, elongated angle members with an L-shaped cross section, formed by bending a elongated plate-like member at a right angle along a single fold line parallel to the longitudinal direction. The first support members 85, 85 and the second support members 86, 86 are the same members, each formed to the required length. The third support members 84, 84 are, for example, elongated channel members with a U-shaped or C-shaped cross section, formed by bending both ends of a elongated plate-like member along two fold lines parallel to the longitudinal direction.

[0069] The first support members 85, 85, the second support members 86, 86, and the third support members 84, 84 each have round holes at regular intervals along the entire length of their flat plate portions, which serve as bolt holes for fastening the electronic device. The first support members 85, 85 and the second support members 86, 86 each have an L-shaped cross section, and round holes run along the entire length of the flat plate portions that are positioned horizontally within the housing 21. The third support members 84, 84 form the groove bottom of a channel material with a U-shaped or C-shaped cross section, and round holes run along the entire length of the flat plate portions that are positioned horizontally within the housing 21. Because the first support members 85, 85, the second support members 86, 86, and the third support members 84, 84 each have multiple round holes as fastening bolt holes along almost their entire length, the electronic device can be attached to a selected location and easily. As a result, the electronic device can be positioned to form a flow path that efficiently allows air to flow within the housing 21. The fixing bolt holes may be elongated holes instead of round holes. If the fixing bolt holes are elongated holes, it is easier to fine-tune the mounting position of the electronic device, which allows for greater flexibility in mounting compared to round holes.

[0070] The two first support members 85, 85 are fixed parallel to each other and at the same height between the opposing surfaces of the left wall portion 25 and the right wall portion 26, with one flat portion of each fixed horizontally. The height at which the two first support members 85, 85 are fixed is about 1 / 5 to 1 / 4 of the height from the upper side between the upper portion 32 of the lower wall portion 22 and the upper wall portion 23. The two first support members 85, 85 are fixed so that the rear first support member 85 is fixed in a position that is almost in contact with the rear wall portion 24, and the front first support member 85 is fixed in a position adjacent to the front ends of the left wall portion 25 and the right wall portion 26, so as to maintain as much distance as possible between them.

[0071] The two second support members 86, 86 are fixed parallel to each other and at the same height between the opposing surfaces of the fixed plate 87 and the left wall portion 25, with one flat portion of each fixed in a horizontal position. The height at which the two second support members 86, 86 are fixed is lower than the two first support members 85, 85, and is about 1 / 2 to 1 / 3 of the height between the upper portion 32 of the lower wall portion 22 and the upper wall portion 23. The two second support members 86, 86 are fixed so that the rear second support member 86 is fixed in a position that is almost in contact with the rear wall portion 24, and the front second support member 86 is fixed in a position that is adjacent to the fixed plate 87 and the front end side of the right wall portion 26, so as to maintain as much distance as possible between them.

[0072] The two third support members 84, 84 are fixed parallel to each other in the left-right direction at the front and rear ends of the upper portion 32 of the lower wall portion 22, respectively, across the entire area between the right wall portion 26 and the stepped portion 31. The third support members 84, 84 are fixed with the U-shaped or C-shaped opening portion facing downward and the flat portion with the round hole facing upward. The third support members 84, 84 may be fixed at other positions on the lower wall portion 22, for example, on the lower portion 33, or may be provided in addition to the third support members 84, 84 at the above-mentioned positions.

[0073] The first support members 85, 85, the second support members 86, 86, and the third support members 84, 84 define upper, middle, and lower levels, which are different height positions for mounting electronic devices inside the housing 21. The housing 21 has the upper, middle, and lower levels on the left side (left wall 25 side) of the housing 21, the upper and middle levels excluding the gap 102 directly above the fan 42 in the central part, and the upper and lower levels on the right side (right wall 26 side). The upper, middle, and lower levels can be configured to arrange electronic devices as follows, for example: Small electronic devices are mounted on the upper level; electronic devices are mounted on the middle level while ensuring the gap 102 directly above the fan 42; and relatively large electronic devices are mounted on the lower level. The above arrangement method ensures a gap 102 directly above the fan 42, allows relatively large and heavy electronic devices to be securely fixed on the bottom wall 22, and allows relatively small electronic devices to be fixed to the upper and middle tiers of the housing 21, where they are easy to attach and detach. Furthermore, the above arrangement method ensures gaps between electronic devices on the upper and middle tiers, forming flow paths for air to flow. Note that the number, vertical positions, and front-to-rear fixing positions of the first support members 85, 85, second support members 86, 86, and third support members 84, 84 can be changed as appropriate depending on the type and number of electronic devices to be installed.

[0074] The arrangement of electronic devices within the housing 21 will be described with reference to FIG. 8 . A second electronic device group 99 is disposed inside the right wall 26, with a gap between them. This gap also includes the space defined by the airflow adjustment member 45. The second electronic device group 99 is, for example, switching hubs 90. The switching hubs 90 are disposed between the right wall 26 and the fixing plate 87, with their longitudinal directions aligned in the front-to-rear direction and parallel to each other. The switching hubs 90 are fixed onto a support plate 83, which is attached across two third support members 84, which are attached to the upper portion 32 of the bottom wall 22. The support plate 83 has round holes for bolts for fixing to the two third support members 84 and for fixing the switching hubs 90. The support plate 83 is fixed onto the third support members 84 with fixing members (not shown). The switching hubs 90 are fixed to the support plate 83 with fixing members (not shown). The switching hubs 90 are arranged with their longitudinal direction aligned with the front-rear direction, and their front faces are located on the front wall 27 side of the housing 21. Therefore, when the access plate 39 provided on the front wall 27 is opened, the operation lamps of the switching hubs 90 are visible, making it easy to understand the operating status of the switching hubs 90. The second electronic device group 99 may include a single electronic device rather than multiple electronic devices, and the term "second electronic device group 99" in this specification refers to one or more electronic devices. The electronic devices included in the second electronic device group 99 include electronic devices that do not meet environmental resistance requirements (heat dissipation, dustproofing) on ​​their own.

[0075] A first electronic device group 98 is arranged inside the left wall portion 25 of the housing 21 and on the second support members 86, 86, with a gap between it and the left wall portion 25. The gap also includes the space defined by the airflow adjustment member 45. The first electronic device group 98 is, for example, an encoder 91. The first electronic device group 98 may include a single electronic device rather than multiple electronic devices, and in this specification, the first electronic device group 98 refers to one or more electronic devices. Note that the electronic devices included in the first electronic device group 98 include electronic devices that do not meet environmental resistance requirements (heat dissipation, dustproofing) on ​​their own.

[0076] As another example of the first electronic device group 98, a PC 92 may be mounted within the housing 21. In FIG. 8, the PC 92 mounted within the housing 21 is indicated by a dashed line. The PC 92 may be mounted anywhere within the housing 21, but it is easier to install the PC 92 on the lower portion 33 of the bottom wall 22 on the right side of the housing 21, where the vertical dimension of the housing 21 is large. The PC 92 is disposed adjacent to the left wall 25 on the lower portion 33, spaced apart from the left wall 25, and sandwiched between two second support members 86, 86. When the PC 92 is mounted in this position, the encoder 91 is fixed in a different position from the above. The second electronic device group 99 is an electronic device, such as the encoder 91 or the PC 92, disposed adjacent to the left wall 25.

[0077] A LAN relay 93 is fixed to the upper side of the first support members 85, 85 adjacent to the right wall portion 26, with a gap between them and the right wall portion 26. Furthermore, an audio encoder 95 is fixed to the upper side of the second support members 86, 86 adjacent to the fixing plate 87, with a small gap between them and the fixing plate 87, and a video encoder 96 is fixed to the lower side of the second support members 86, 86. An amplifier 94 is fixed to the lower side of the first support members 85, 85, with a gap between them and the fixing plate 87, approximately in the center of the left-right direction of the housing 21.

[0078] Each electronic device is fixed to first support members 85, 85, second support members 86, 86, or third support members 84, 84 via a plate-like elongated member such as support plate 83 as needed. A connector 97 is disposed on the front side of the lower part 33 of the lower wall 22. Although wiring is omitted in FIG. 8 , the electronic devices inside the housing 21 are electrically connected to the outside of the housing 21 via the connector 97.

[0079] An example of the air flow that cools electronic devices within the housing 21 will be described with reference to FIG. 8. In FIG. 8, the main air flow, i.e., the air flow path, is indicated by arrows. A fan 42 is fixed to the central region of the lower wall 22, in a position near the center of the housing 21 on the upper side 32 of the lower wall 22. Ventilation openings 43 are also provided in the left wall 25 and the right wall 26. The rotation direction of the fan 42 is set so as to draw air into the housing 21 from the space 101 in the lower wall 22. This allows the fan 42 to draw air from the space between the seat 11 and the rear structure, which is relatively dust-resistant. Therefore, the fan 42 can draw air with relatively little dust into the housing 21. The rotation direction of the fan 42 can also be reversed, and the rotation direction of the fan 42 can be set so as to exhaust air from the inside of the housing 21 to the outside.

[0080] The air taken in by the fan 42 passes through the gap 102 directly above the fan 42, and flows upward through gaps in the front, rear, left and right of the video encoder 96, audio encoder 95, and amplifier 94 directly above the fan 42. wall The air flows along the airflow section 27 to the right of the housing 21, and moves upward while passing in front of the switching hubs 90. wall The air flows to the left of the housing 21 along the wall 27, and moves upward while passing the front and rear surfaces of the encoder 91 or PC 92. The air that moves upward cools the LAN relay 93 that it comes into contact with while flowing left or right, and then reaches the left wall 25 or right wall 26 of the housing 21. Thereafter, the air passes through the respective airflow adjustment members 45 and is discharged from the ventilation opening 43.

[0081] That is, air entering the housing 21 through the fan 42 installed on the bottom wall 22 passes through the gap 102, and separates into two airflow paths from the center of the housing 21 in the left-right direction toward the left wall 25 and the right wall 26. The spaces between the airflow adjustment member 45 and the left wall 25 or the right wall 26 form part of the airflow paths. The electronic devices installed in the housing 21 are arranged in the airflow path. The first electronic device group 98 is arranged around the left wall 25 and is arranged in the airflow path from the fan 42 to the left wall 25. The second electronic device group 99 is arranged around the right wall 26 and is arranged in the airflow path from the fan 42 to the right wall 26. This allows electronic devices that generate particularly large amounts of heat to be spaced apart and arranged in separate airflow paths, thereby enabling efficient cooling.

[0082] According to the embodiment described above, efficient ventilation with little fluid resistance can be achieved between the inside and outside of the housing 21 that houses the first electronic device group 98 and the second electronic device group 99. Therefore, by arranging electronic devices that do not satisfy the environmental resistance requirements (heat exhaust, dust resistance) on their own, the electronic devices can be made to satisfy the environmental resistance requirements (heat exhaust, dust resistance).

[0083] The above-described embodiment can be partially replaced with the following modifications.

[0084] In the above description, the housing 21 has a substantially rectangular parallelepiped shape, with its longitudinal direction extending along the left-right direction of the cockpit 2. Alternatively, the housing 21 may have a substantially cubic shape with its longitudinal and left-right dimensions being approximately the same. In the above-described cases where the housing 21 is substantially rectangular parallelepiped and its longitudinal direction is the left-right direction, or the case where the housing 21 is substantially rectangular parallelepiped and its longitudinal direction is the front-to-back direction, or the case where the housing 21 is substantially cubic, the first electronic device group 98 and the second electronic device group 99 may be arranged along the front-to-back direction, in addition to being arranged along the left-to-right direction. Alternatively, the first electronic device group 98 and the second electronic device group 99 may be arranged offset from each other in both the front-to-back and left-to-right directions, i.e., the straight line passing through the first electronic device group 98 and the second electronic device group 99 may be arranged in neither the front-to-back nor left-to-right direction. For example, when viewed from above inside the housing 21, the first electronic device group 98 may be arranged at the front left, and the second electronic device group 99 may be arranged at the rear right. Alternatively, the first electronic device group 98 may be located at the rear left, and the second electronic device group 99 may be located at the front right.

[0085] The housing 21 has been described as having a configuration in which the fan 42 is provided in the bottom wall 22 and the vents 43 are provided in the left and right wall portions 25 and 26. Alternatively, the fan 42 may be provided in one or more of the bottom wall 22, left wall 25, right wall 26, rear wall 24, upper wall 23, and front wall 27. In this case, the fan 42 is provided in a portion of the wall adjacent to the gap 102 formed in the housing 21. This allows for efficient ventilation between the inside and outside of the housing 21. Alternatively, the vents 43 may be provided in one or more of the wall portions in which the fan 42 is not provided, namely the bottom wall 22, left wall 25, right wall 26, rear wall 24, upper wall 23, and front wall 27. The above-described variations in the arrangement of the fan 42 and the vents 43 can be applied to any of the housing shapes described in the previous paragraph. The ventilation opening 43 is preferably arranged in the side wall portion 29 at a portion where at least the first electronic device group 98 and the second electronic device group 99 are adjacent.

[0086] In either case, the fan 42 and the vent 43 may be interchanged. For example, the vent 43 may be provided in the lower wall portion 22, and the fan 42 may be provided in the left wall portion 25 and the right wall portion 26. Alternatively, either the fan 42 or the vent 43 may be provided in the lower wall portion 22, and the other of the fan 42 and the vent 43 may be provided in at least one of the side walls 29. Alternatively, only either the fan 42 or the vent 43 may be provided in the housing 21. In other words, only either the fan 42 or the vent 43 may be provided in one or more of the lower wall portion 22, the left wall portion 25, the right wall portion 26, the front wall portion 27, the rear wall portion 24, and the upper wall portion 23. When only the vent hole 43 is provided in the housing 21, the fan 42 may be provided inside the housing 21, for example, at any location above, in front, on the left side, on the right side, or in the rear of the gap 102, and may be supported by a fixing member (not shown). Even in this case, the fan 42 and the vent hole 43 form an air flow path, and the electronic device is placed in the air flow path.

[0087] The position of the fan 42 or the vent 43 on the lower wall 22 may be other than the central region of the lower wall 22. The position of the fan 42 or the vent 43 on the lower wall 22 may be, for example, an intermediate portion between the central region of the lower wall 22 and the left wall 25 on which the first electronic device group 98 is arranged or the right wall 26 on which the second electronic device group 99 is arranged. Alternatively, the position of the fan 42 or the vent 43 on the lower wall 22 may be near the right wall 26 on the opposite side of the left wall 25 on which the first electronic device group 98 is arranged, or near the left wall 25 on the opposite side of the right wall 26 on which the second electronic device group 99 is arranged. Alternatively, the position may be adjacent to the left wall 25 on which the first electronic device group 98 is arranged or the right wall 26 on which the second electronic device group 99 is arranged. The first electronic device group 98 and the second electronic device group 99 are preferably arranged in the path of the air flow path formed by the fan 42 and the vent 43 .

[0088] In the above embodiment, the housing 21 has a first electronic device group 98 and a second electronic device group 99. This configuration may be such that only one of these is provided, i.e., a single electronic device group is provided. That is, the housing 21 may be provided with only the first electronic device group 98. Alternatively, the housing 21 may be provided with only the second electronic device group 99. In this case, it is not necessary for multiple airflow paths to be formed branching out from the center of the housing 21 to both the left and right, as long as at least one is formed. The single electronic device group provided in the housing 21 is disposed in a single airflow path formed between the fan 42 and the vent 43. For example, the fan 42 may be provided in the bottom wall 22, the vent 43 may be provided in one or more of the side wall 29, and an electronic device group may be provided between the gap 102 directly above the fan 42 and the vent 43 in the side wall 29. Alternatively, a fan 42 may be provided on the lower wall portion 22, an air vent 43 may be provided on the upper wall portion 23, and an electronic device group may be provided adjacent to the upper wall portion 23. In this case, an air flow path is formed in the vertical direction between the fan 42 on the lower wall portion 22 and the air vent 43 on the upper wall portion 23, and the electronic device group is disposed in the path of the vertical air flow path.

[0089] For example, either the fan 42 or the vent 43 may be arranged in the lower wall portion 22, and the other either the fan 42 or the vent 43 may be arranged in either the left wall portion 25 where the first electronic device group 98 is arranged or the right wall portion 26 where the second electronic device group 99 is arranged. Either the fan 42 or the vent 43 may be arranged in one or more of the lower wall portion 22, the left wall portion 25, the right wall portion 26, the rear wall portion 24, the upper wall portion 23, and the front wall portion 27, and the other either the fan 42 or the vent 43 may be arranged in one or more of the lower wall portion 22, the left wall portion 25, the right wall portion 26, the rear wall portion 24, the upper wall portion 23, and the front wall portion 27 where the fan 42 is not arranged. The fan 42 and the vent 43 arranged in this manner form at least one air flow path, and electronic devices arranged in the air flow path are cooled by air. Furthermore, instead of the case where the housing 21 is provided with both the fan 42 and the vent 43 as described above, the housing 21 may be provided with only a plurality of vents 43 .

[0090] In the above embodiment, the upper wall portion 23 and the front wall portion 27 of the housing 21 are integrally formed as the upper front wall portion 28. Instead of the upper front wall portion 28, the upper wall portion 23 and the front wall portion 27 may be formed separately rather than integrally. That is, the housing 21 may be configured to have the upper wall portion 23 that defines the upper side of the housing 21 and is formed independently, and the front wall portion 27 that defines the front side of the housing 21 and has the first front wall portion 35 and the second front wall portion 36 that are connected to each other and are formed integrally. Therefore, in the seat-behind space 17, which is relatively tight in the front-to-rear direction, a maintenance worker can remove the upper wall portion 23 that blocks the upper side of the housing 21 by working only from above. Therefore, in the seat-behind space 17, which is relatively tight in the front-to-rear direction, a maintenance worker can easily view the interior of the housing 21 and perform maintenance.

[0091] In the above embodiment, the first front wall 35 is provided with an opening / closing unit 37 having a hinge 38 and an opening / closing plate 39. Instead of the rotating opening / closing unit 37 having the hinge 38, an opening / closing unit in which the opening / closing plate slides on the surface of the first front wall 35 may be provided. Therefore, in the seat rear space 17, which is relatively short in the front-to-rear direction, a maintenance worker can easily open the opening / closing unit and view the inside of the housing 21 without having to tilt the seat 11 too far forward to rotate the opening / closing plate 39.

[0092] In the above embodiment, the housing 21 is fixed to the cockpit rear section 5 by the housing fixing part 51 on the rear side of the housing 21. Alternatively, the housing 21 may be fixed to the seat 11 by the housing fixing part 51 on the front side of the housing 21. Regarding the method of fixing the front side of the housing 21, the housing 21 may be fixed to the rear surface of the seat 11 via the housing fixing part 51, for example. Alternatively, a fixing device may be added that is attached across between the cockpit left section 6 and the cockpit right section 7 of the cockpit 2, and the housing 21 may be fixed to the fixing device via the housing fixing part 51, or the housing 21 may be fixed directly to the fixing device.

[0093] As described above, the electronic device support structure of the present invention includes a housing 21 that houses an electronic device and is disposed behind the seat 11 with a space between it and the lower structure, and the housing 21 has either a vent or a fan in at least one of the side walls of the housing 21, and either a vent or a fan in the lower wall of the housing 21. Therefore, since the electronic device support structure of the present invention has a space between the lower wall and the lower structure, air passing through the vent or fan in the lower wall is not obstructed by the lower structure facing the lower wall, and air can circulate efficiently between the inside and outside of the housing 21 with little fluid resistance. Therefore, the electronic device support structure of the present invention can ensure the dissipation of heat generated by the electronic device.

[0094] The electronic device support structure of the present invention includes a housing 21 disposed behind a seat provided in a cockpit 2 of a construction machine, in which a first electronic device group 98 and a second electronic device group 99 are disposed with a horizontal gap therebetween, and one of an air vent 43 and a fan 42 is provided at a portion of one of the walls of the housing 21 facing the gap, and the other is provided in the first wall of the housing 21 adjacent to the first electronic device group 98 and in the second wall of the housing 21 adjacent to the second electronic device group 99. Therefore, the electronic device support structure of the present invention allows air to circulate efficiently between the inside and outside of the housing 21 with little fluid resistance. Therefore, the electronic device support structure of the present invention can ensure the dissipation of heat generated by the electronic devices. [Explanation of symbols]

[0095] 2 cockpit, 11 seat, 19 structure (lower structure), 21 housing, 22 lower wall, 29 side wall, 31 step, 42 fan, 43 vent, 45 airflow adjustment member, 37 opening / closing section, 88 placing section, 98 first electronic device group, 99 second electronic device group, 101 space, 102 gap.

Claims

1. The construction machine includes a housing disposed behind a seat provided in a control room of the construction machine, a first electronic device group and a second electronic device group each including an electronic device are arranged in the housing with a gap in the horizontal direction; An electronic device support structure in which either a vent or a fan is provided in a portion of one of the walls of the housing facing the gap, and either the other is provided in each of the first wall of the housing adjacent to the first group of electronic devices and the second wall of the housing adjacent to the second group of electronic devices.

2. A construction machine comprising a housing that is disposed behind a seat provided in a driver's cabin of the construction machine so as to have a space between it and a lower structure, and that houses an electronic device; the housing has one or more side wall portions of the housing and a bottom wall portion of the housing each having one selected from a vent and a fan; a first electronic device group and a second electronic device group are arranged in the housing with a gap therebetween in the horizontal direction of the cockpit, An electronic device support structure in which either a vent or a fan is provided in a portion of one of the walls of the housing facing the gap, and either the other is provided in each of the first wall of the housing adjacent to the first group of electronic devices and the second wall of the housing adjacent to the second group of electronic devices.

3. the vent holes are provided in the first wall portion and the second wall portion, The electronic device support structure according to claim 1 or 2, wherein one fan is provided in a central region of a wall portion including a portion facing the gap.

4. 4. The electronic device support structure according to claim 1, wherein the housing has an airflow adjusting member that defines a path through which air flows within the housing and guides the air to the ventilation opening.

5. 5. The electronic device support structure according to claim 1, wherein the housing has an openable / closable part on a front wall of the housing.

6. 6. The electronic device support structure according to claim 1, wherein the housing has a step on an upper surface or a lower surface of the housing.

7. 7. The electronic device support structure according to claim 1, wherein the housing includes a mounting portion therein on which the electronic device is mounted.

8. A construction machine equipped with the electronic device support structure according to any one of claims 1 to 7, The electronic device is a remote control electronic device for construction machinery.

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