Camera protection device

Abstract

To provide a camera protection device capable of preventing damage to a camera due to a collision between the camera and an object.SOLUTION: A camera protection device 60 is provided with a protection part 61 installed in a rear space 50 of a driver seat formed in an operation room 32 of a work machine 100 and arranged on at least a part of surroundings of a camera 54. This allows the camera 54 to be prevented from colliding with an object by the protection part 61, resulting that damage to the camera 54 due to a collision between the camera 54 and the object is prevented.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to a camera protection device provided on a work machine. [Background technology]

[0002] A camera for remote control, for example, may be installed inside the control cabin of a work machine. For example, Patent Document 1 discloses a structure in which a tower member for installing a camera is installed in a space formed behind the control seat, and the camera is installed on the tower member so that the camera lens is at eye level when the operator is seated in the control seat. Also, Patent Document 2 discloses a structure in which a housing for accommodating electronic devices is arranged in the space behind the seat between the seat (driver's seat) and the rear structure, and an imaging device (camera) for capturing images of the area in front of the control cabin is arranged above the housing. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-49468 [Patent Document 2] Japanese Patent Publication No. 2023-83071 Summary of the Invention [Problem to be solved by the invention]

[0004] However, cameras are vulnerable to external forces, and if the camera comes into contact with an object when the camera is being swiveled, or if an object moving toward the camera collides with the camera, the camera may be damaged.

[0005] The present disclosure has been made to solve the above-mentioned problems, and its purpose is to provide a camera protection device that can prevent damage to a camera due to a collision between the camera and an object. [Means for solving the problem]

[0006] A camera protection device according to a first aspect is installed in a space formed in an operator's compartment of a work machine, and includes a protection section that is arranged around at least a portion of the periphery of the camera.

[0007] According to the first aspect, the camera protection device includes a protection part disposed around at least a part of the periphery of the camera, and therefore the protection part prevents the camera from colliding with an object, thereby preventing damage to the camera due to the collision between the camera and an object.

[0008] In a second aspect, it is desirable that the camera protection device according to the first aspect further includes the following feature. That is, in the camera protection device according to the second aspect, the space is formed between the rear end of the driver's seat and the rear wall of the control room. According to this second aspect, even if luggage is placed behind the driver's seat, for example, the protection part can prevent the luggage from interfering with the camera.

[0009] A third aspect is preferably the camera protection device according to the first or second aspect, further comprising the following feature: In the camera protection device according to the third aspect, the height of the upper end of the protection part is located lower than the upper end of the window frame of the window formed in the rear wall of the operation room. According to this third aspect, rear visibility can be ensured, and an escape route through the window can also be easily secured.

[0010] A fourth aspect is the camera protection device according to any one of the first to third aspects, and preferably further includes the following feature. That is, in the camera protection device according to the fourth aspect, the camera is supported by a pan head that can change the orientation of the camera, and the protection unit is disposed outside the range of motion of the camera and the pan head. According to this fourth aspect, it is possible to prevent the protection unit from interfering with the camera and the pan head.

[0011] A fifth aspect is the camera protection device according to any one of the first to fourth aspects, and preferably further includes the following feature: In other words, in the camera protection device according to the fifth aspect, the protection part is disposed at a position that is not within the field of view of the camera. According to this fifth aspect, it is possible to prevent the protection part from appearing in the video captured by the camera.

[0012] A sixth aspect is preferably the camera protection device according to any one of the first to fifth aspects, further comprising the following feature: In other words, in the camera protection device according to the sixth aspect, the protection portion includes portions that are arranged along the left and right sides of the camera. According to this sixth aspect, the protection portion can prevent an object moving toward the camera from the left or right of the camera from colliding with the camera.

[0013] According to a seventh aspect, in the camera protection device according to any one of the first to sixth aspects, it is desirable that the camera protection device further comprises the following feature: That is, in the camera protection device according to the seventh aspect, the protection part includes a part that is arranged along the rear part of the camera. According to this seventh aspect, the protection part can prevent an object moving toward the camera from behind the camera from colliding with the camera.

[0014] According to an eighth aspect, in the camera protection device according to any one of the first to seventh aspects, it is desirable that the camera protection device further comprises the following feature: That is, in the camera protection device according to the eighth aspect, the protection section includes a portion that is disposed forward of the camera. According to this eighth aspect, the protection section can prevent an object moving from in front of the camera toward the camera from colliding with the camera.

[0015] A ninth aspect is preferably the camera protection device according to the eighth aspect, further comprising the following feature: In other words, in the camera protection device according to the ninth aspect, the space is formed between the rear end of a driver's seat having a headrest with a movable range that allows it to move back and forth and the rear wall of the control room, and the portion is disposed at a position corresponding to the rear end of the movable range of the headrest. According to this ninth aspect, the protective part can prevent the headrest from colliding with the camera when the operator moves the driver's seat rearward.

[0016] A tenth aspect preferably further comprises the following feature in the camera protection device according to any one of the first to ninth aspects. That is, in the camera protection device according to the tenth aspect, the protection unit comprises at least one of a first member arranged along the left side, right side, and rear side of the camera and a third member arranged forward of the camera, and a second member arranged at least either above or below the camera. According to this tenth aspect, when the first member is provided, the first member can prevent an object moving toward the camera from the left or right direction or from behind the camera from colliding with the camera. Furthermore, when the third member is provided, the third member can prevent an object moving toward the camera from in front of the camera from colliding with the camera. Furthermore, the second member can prevent an object moving toward the camera from above or below the camera from colliding with the camera. [Effects of the Invention]

[0017] According to the present disclosure, a camera protection device is provided that can prevent damage to a camera due to a collision between the camera and an object. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is a left side view showing a work machine according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a perspective view of the cab as seen from the left front. [Figure 3]FIG. 2 is a left side view showing the internal structure of the cab, as viewed from the left side in the left-right direction of the work machine. [Figure 4] FIG. 2 is a front view of the interior of the cab as seen from the front side in the traveling direction of the work machine. [Figure 5] FIG. 2 is a top view of the interior of the cab as seen from vertically above the work machine. [Figure 6] FIG. 2 is a perspective view of the camera and the camera protection device as seen from the left front. [Figure 7] FIG. 2 is a left side view of the camera and the camera protection device as seen from the left. [Figure 8] FIG. 2 is a perspective view of the camera and the camera protection device as seen from the front right. [Figure 9] FIG. 2 is a perspective view of the camera and the camera protection device as seen from the right rear. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. FIG. 1 is a left side view of a work machine 100 according to an embodiment of the present disclosure. The work machine 100 includes a lower traveling body 1 including a traveling device, an upper rotating body 2 supported on the lower traveling body 1 so as to be rotatable relative to the lower traveling body 1 about a vertically extending rotation axis Z, and a work implement 3 mounted on the upper rotating body 2 and operated by an operator or remotely. The work implement 3 includes, for example, a boom, an arm, and a bucket. The work machine 100 according to this embodiment is a hydraulic excavator, but the work machine in the present disclosure is not limited to hydraulic excavators and may be other work machines such as a crane or a bulldozer. The travelling device may be, for example, a crawler-type travelling device or a travelling device having tires.

[0020] The upper rotating body 2 includes a rotating frame 2a, a cab 11 supported by the rotating frame 2a, and a machinery room 12 located at the rear of the upper rotating body 2. The machinery room 12 houses an engine, a hydraulic circuit device, etc., and a counterweight is provided at the rear of the machinery room 12.

[0021] The cab 11 is mounted at the front of the revolving frame 2a on the left side in the left-right direction of the revolving frame 2a, and constitutes an operation room 32 equipped with an operation device consisting of levers, pedals, etc. for operating the work machine 100. In other words, in response to operations performed by an operator inside the cab 11 via the operation device, the work machine 100 performs operations such as traveling of the lower traveling body 1, rotation of the upper revolving body 2, and work operation of the work device 3.

[0022] The work machine 100 is configured to be remotely operable, and an antenna 20 is attached to the roof of the cab 11. The antenna 20 is a device for receiving operation signals output from a remote control device 200 when an operator remotely operates the work machine 100 using the remote control device 200, which is located at a distance from the work machine 100. The work machine 100 can operate in response to operations given to the remote control device 200.

[0023] Fig. 2 is a perspective view of the cab 11 as seen from the left front. Fig. 3 is a diagram showing the internal structure of the cab 11, and is a left side view of the interior of the cab 11 as seen from the left side in the left-right direction of the upper rotating body 2. Fig. 4 is a front view of the interior of the cab 11 as seen from the front side in the fore-and-aft direction of the upper rotating body 2. Fig. 5 is a top view of the interior of the cab 11 as seen from vertically above. Note that in Fig. 4, the operator's seat 34, which will be described later, has been removed.

[0024] The cab 11 includes a front wall 22 located in front of the upper rotating body 2 in the fore-and-aft direction, a rear wall 24 located in the rear of the upper rotating body 2 in the fore-and-aft direction, an upper wall 26 located vertically above the upper rotating body 2, a left wall 28 located on the left side of the upper rotating body 2 in the left-and-right direction, and a right wall 30 located on the right side of the upper rotating body 2 in the left-and-right direction. The cab 11 is formed in a box shape surrounded by the front wall 22, the rear wall 24, the upper wall 26, the left wall 28, and the right wall 30. As a result, an operator compartment 32 is formed inside the cab 11.

[0025] As shown in Fig. 4, a window 25 is provided on the rear wall 24. The window 25 not only ensures rearward visibility, but also serves as an emergency exit for the operator to escape from the control room 32 in the event that the work machine 100 tips over and blocks the entrance to the control room 32.

[0026] A driver's seat 34 is provided in the operation room 32. The driver's seat 34 is disposed approximately in the center in the left-right direction and in the center in the front-rear direction of the cab 11. The driver's seat 34 is used by an operator to sit in and operate the work machine 100.

[0027] The driver's seat 34 includes a seat portion 36, a backrest 38, a headrest 40, and a pair of armrests 42 disposed on both the left and right sides of the seat portion 36. The driver's seat 34 is configured to be movable in the fore-and-aft direction of the cab 11 by means of slide rails 44. Specifically, the headrest 40 of the driver's seat 34 can be moved rearward by means of the slide rails 44 to the position shown by the dashed line in FIG. 7. The position of the headrest 40 shown by the dashed line in FIG. 7 corresponds to the rear end of the rear range of movement of the driver's seat 34 in the fore-and-aft direction. The backrest 38 is configured to be rotatable forward and rearward from an upright position relative to the seat portion 36 within a predetermined range, centered on the lower end of the backrest 38 connected to the seat portion 36.

[0028] The headrest 40 is configured to be detachable from the upper end of the backrest 38. The headrest 40 is also configured to be rotatable, for example, around the connection part with the backrest 38. For example, when remotely operating the work machine 100, the headrest 40 can be removed from the backrest 38 or pushed forward to ensure a good forward field of view for a camera 54 (described below) installed behind the headrest 40.

[0029] An operating lever 46 is provided on each of the pair of left and right armrests 42 on the front side. Various operations of the work machine 100, such as rotating the upper rotating body 2, and operating the boom, arm, and bucket of the work implement 3, are performed using the operating levers 46. In addition, a pair of left and right travel levers 48 corresponding to, for example, the left and right crawlers are disposed in front of the driver's seat 34. When the operator gets on the work machine 100, he or she operates the operating levers and the like corresponding to these operating devices to steer the work machine 100.

[0030] In the control room 32, a space 50 behind the driver's seat is formed between the rear end of the driver's seat 34 and the rear wall 24. Various structures are arranged in the space 50 behind the driver's seat. For example, a housing 52 is arranged behind the backrest 38. The housing 52 houses, for example, electronic components. The housing 52 is formed in a rectangular parallelepiped shape, and its longitudinal direction is arranged along the left-right direction of the upper rotating body 2. Furthermore, a portion located at the front and upper part of the housing 52 is inclined rearward as it goes upward so that the backrest 38 can be rotated rearward within a predetermined range. The space 50 behind the driver's seat is an example of the "space" of the present invention.

[0031] A camera 54 that captures images of the area in front of the operator's cab 32 is installed on a top plate 52a located at the top of the housing 52. The images captured by the camera 54 are transmitted to the remote control device 200 via a communication device (not shown). The operator remotely controls the work machine 100 while viewing the images received and displayed by the remote control device 200. The camera 54 is supported on a pan head 55 that allows the orientation of the camera 54 to be changed. To make it easier for the operator to view the area in front, the height of the lens 54a of the camera 54 is adjusted so that it is approximately the same height as the eyes of the operator seated in the driver's seat 34 when the camera 54 is facing forward. The lens 54a of the camera 54 is also located at the same position as the headrest 40 in the left-right direction of the cab 11. A camera protection device 60 (described later) is installed around the camera 54 to protect the camera 54.

[0032] Fig. 6 is a perspective view of the camera 54 and the camera protection device 60 as seen from the left front. Fig. 7 is a left side view of the camera 54 and the camera protection device 60 as seen from the left. Fig. 8 is a perspective view of the camera 54 and the camera protection device 60 as seen from the right front. Fig. 9 is a perspective view of the camera 54 and the camera protection device 60 as seen from the right rear. In the following description, the front-to-rear direction corresponds to the front-to-rear direction of the upper rotating body 2, and the left-to-right direction corresponds to the left-to-right direction of the upper rotating body 2.

[0033] The camera 54 includes a cylindrical portion 54b with a lens 54a attached to the front, and a main body portion 54c connected to the rear of the cylindrical portion 54b. Wiring 56 extends from the rear of the main body portion 54c for power supply and transmission of image data. The wiring 56 is connected to, for example, electronic components housed in the housing 52.

[0034] The camera platform 55 supports the camera 54 so that it can swing up and down and left and right. The camera platform 55 includes a first member 55a that supports the camera 54 so that it can swing up and down, a first box member 55b that houses a rotary motor (not shown) and other components that rotate the first member 55a, a second member 55c that supports the camera 54 so that it can swing left and right, and a second box member 55d that houses a rotary motor (not shown) and other components that rotate the second member 55c.

[0035] The first member 55a is a member on which the camera 54 is installed. The first member 55a is formed, for example, in a U-shape when viewed in the front-to-rear direction of the upper rotating body 2. The first box member 55b is disposed, for example, on the left side of the camera 54. The first member 55a is configured to be rotatable about a center line C1 shown in FIG. 8 by a rotary motor housed in the first box member 55b. The camera 54 is swung up and down in conjunction with the rotation of the first member 55a.

[0036] The second member 55c is formed, for example, in a U-shape when viewed in the front-to-rear direction of the upper rotating body 2. The second member 55c is arranged to support both left and right ends of the first member 55a. For example, the first member 55a and the second member 55c have a nested structure in which the first member 55a is arranged inside the second member 55c. The second box member 55d is arranged vertically below the second member 55c. The second member 55c is configured to be rotatable about a center line C2 parallel to the vertical direction shown in FIG. 8 by a rotary motor housed in the second box member 55d. The camera 54 swings left and right in response to the rotation of the second member 55c. The rotary motor housed in the first box member 55b and the rotary motor housed in the second box member 55d are both driven based on an operation signal output from the remote control device 200.

[0037] [Camera protection device structure] A camera protection device 60 is installed around the camera 54 to protect the camera 54. The camera protection device 60 includes a protection portion 61 that is arranged around the camera 54.

[0038] The protective portion 61 includes portions disposed along the left and right sides of the camera 54. The protective portion 61 also includes a portion disposed along the rear of the camera 54. The protective portion 61 also includes a portion disposed vertically above the camera 54. The protective portion 61 also includes a portion disposed forward of the camera 54. Here, in the protective portion 61, the portions disposed along the left and right sides of the camera 54 and the portion disposed along the rear of the camera 54 may be integrally formed. In this case, the protective portion 61 includes a first protective member 62 disposed along the left, right, and rear sides of the camera 54, a second protective member 64 disposed vertically above the camera 54, and a third protective member 66 disposed forward of the camera 54. The first protective member 62 is an example of a “first member” in the present invention, the second protective member 64 is an example of a “second member” in the present invention, and the third protective member 66 is an example of a “third member” in the present invention.

[0039] The first protective member 62 may be formed in a substantially U-shape when viewed vertically from above so as to surround the left and right sides and rear of the camera 54. Specifically, the first protective member 62 includes a left partition plate 62a disposed on the left side of the camera 54, a right partition plate 62b disposed on the right side of the camera 54, and a rear partition plate 62c disposed on the rear side of the camera 54. The left partition plate 62a, the right partition plate 62b, and the rear partition plate 62c are all disposed a predetermined distance away from the camera 54.

[0040] The left partition plate 62a has a curved shape. Specifically, the left partition plate 62a includes a first left partition plate 70a that is disposed on the front side in the front-to-rear direction and is parallel or approximately parallel to the front-to-rear direction of the upper rotating body 2, and a second left partition plate 72a that is connected to the rear end of the first left partition plate 70a and inclines toward the right as it extends rearward.

[0041] The right-side partition plate 62b has a curved shape. Specifically, the right-side partition plate 62b includes a first right-side partition plate 70b that is disposed on the front side in the front-to-rear direction and is parallel or approximately parallel to the front-to-rear direction of the upper rotating body 2, and a second right-side partition plate 72b that is connected to the rear end of the first right-side partition plate 70b and inclined toward the left as it extends rearward.

[0042] The rear partition plate 62c is disposed parallel to the left-right direction of the upper rotating body 2. The left end of the rear partition plate 62c is connected to the rear end of the second left partition plate 72a of the left partition plate 62a. The right end of the rear partition plate 62c is connected to the rear end of the second right partition plate 72b of the right partition plate 62b. A notch 74 is formed in the lower center in the left-right direction of the rear partition plate 62c to pass the wiring 56 extending from the camera 54 to the outside of the first protective member 62.

[0043] As shown in FIG. 4 , the height of the upper end 62d of the first protective member 62 is lower than the upper end 25a of the window frame of the window 25 formed in the rear wall 24. The position of the upper end 62d of the first protective member 62 is preferably a position that ensures rearward visibility and / or a position that prevents the first protective member 62 from obstructing the operator's escape through the window 25 in the rear wall 24. For example, the position of the upper end 62d of the first protective member 62 is preferably lower than half the vertical position of the window frame. The first protective member 62 is also positioned outside the range of motion of the camera 54 and the camera platform 55 when the camera 54 oscillates. In other words, the distance between the camera 54 and the first protective member 62 is adjusted so that the camera 54 and the camera platform 55 do not interfere with the first protective member 62 when the camera 54 oscillates.

[0044] 9, the first protective member 62 is adjusted to a position that does not enter the field of view of the camera 54. Specifically, the positions of the front end portions of the first left-side partition plate 70a and the first right-side partition plate 70b of the first protective member 62 are adjusted to positions that do not enter the field of view of the camera 54.

[0045] The second protective member 64 is disposed vertically above the camera 54 so as to cover the lens 54a and the cylindrical portion 54b of the camera 54. The second protective member 64 may be formed, for example, with a flat portion 64a that is parallel or approximately parallel to the horizontal plane, and a pair of side portions 64b that extend downward from both left and right ends of the flat portion 64a. The rear end of the flat portion 64a of the second protective member 64 is fixed to the main body portion 54c of the camera 54.

[0046] 4, the height of the flat portion 64a (upper end) of the second protective member 64 is located below the upper end 25a of the window frame of the window 25 formed in the rear wall 24. The position of the upper end of the second protective member 64 is preferably a position that ensures rearward visibility and / or a position that prevents the second protective member 64 from obstructing the operator's escape when the operator tries to escape through the window 25 in the rear wall 24. For example, the position of the upper end of the second protective member 64 is preferably below half the vertical position of the window frame. The position of the front end of the second protective member 64 in the fore-and-aft direction is adjusted to a position that does not fall within the field of view of the camera 54, as shown in FIG.

[0047] The third protective member 66 is disposed in front of the camera 54 and between the headrest 40 and the camera 54. The third protective member 66 may be formed in a trapezoidal shape as shown in Fig. 6 when viewed from the front. The third protective member 66 is disposed behind the headrest 40 and in a position overlapping with the headrest 40 when viewed from the front. In other words, the third protective member 66 is disposed at the same height as the headrest 40 in the up-down direction and in the same position as the headrest 40 in the left-right direction.

[0048] 4, the height of the upper end of the third protective member 66 is positioned lower than the upper end 25a of the window frame of the window 25 formed in the rear wall 24. The third protective member 66 is also positioned outside the range of movement of the camera 54 and the camera platform 55 when the camera 54 is swiveled. Furthermore, the height of the upper end of the third protective member 66 is adjusted to a position that does not enter the field of view of the camera 54, as shown in FIG.

[0049] [Camera protection device function] The function of the camera protection device 60 configured as described above will be described below. The camera 54 is installed on top of the housing 52, which is located in the space 50 behind the driver's seat between the rear end of the driver's seat 34 and the rear wall 24. When the operator is in the cab 11 to operate the work machine 100, it is conceivable that the operator will place luggage on top of the housing 52 near the camera 54. In this case, there is a risk that the luggage will move and come into contact with the camera 54 or the camera platform 55 while the work machine 100 is being operated, damaging the camera 54 or the camera platform 55. In response to this, the first protection member 62 is arranged to surround the left and right sides and the rear of the camera 54. Therefore, even if the luggage moves toward the camera 54, the luggage will come into contact with the first protection member 62, preventing the luggage from coming into contact with the camera 54 and the camera platform 55.

[0050] Furthermore, when the work machine 100 is remotely operated using the remote control device 200, the pan head 55 operates, changing the positions of the camera 54 and the pan head 55. In contrast, the first protective member 62 is positioned outside the range of motion of the camera 54 and the pan head 55, and therefore the camera 54 and the pan head 55 are prevented from interfering with the first protective member 62.

[0051] Furthermore, the height of the upper end 62d of the first protective member 62 is positioned lower than the upper end 25a of the window frame of the window 25 in the rear wall 24, so rear visibility is ensured. Furthermore, when operating the actual machine, if the work machine 100 tips over so that the entrance to the operation room 32 is blocked and the operator escapes through the window 25 in the rear wall 24, the first protective member 62 will no longer hinder the operator's escape, making it easier to ensure an escape route for the operator. Furthermore, when operating remotely, the first protective member 62 is adjusted to a position that is not within the field of view of the camera 54, so that a part (front end) of the first protective member 62 is prevented from appearing in the image captured by the camera 54, and the first protective member 62 is prevented from obstructing the image captured by the camera 54.

[0052] Furthermore, because the second protective member 64 is disposed vertically above the camera 54, even if an object falls from above the camera 54, the object will collide with the second protective member 64, preventing the object from colliding with the camera 54 and the camera platform 55. Furthermore, because the height of the upper end of the second protective member 64 is located lower than the upper end 25a of the window frame of the window 25 in the rear wall 24, rear visibility is ensured and an escape route for the operator to escape through the window 25 is easily secured. Furthermore, because the front end of the second protective member 64 is adjusted to a position that is not within the field of view of the camera 54, it is possible to prevent a part of the second protective member 64 (the front end) from appearing in the image captured by the camera 54 and the second protective member 64 from interfering with the image captured by the camera 54.

[0053] 7 , the driver's seat 34 can be slid rearward to the position indicated by the dashed line. When the driver's seat 34 is slid rearward, the backrest 38 is rotated rearward, or the headrest 40 is rotated, there is a risk that the headrest 40 will collide with the camera 54 and the camera platform 55. In contrast, the third protective member 66 is positioned forward of the camera 54. Therefore, even when the operator moves the driver's seat 34 rearward, rotates the backrest 38, or rotates the headrest 40, the headrest 40 will collide with the third protective member 66. This prevents the headrest 40 from colliding with the camera 54 and the camera platform 55. Furthermore, the third protective member 66 is positioned outside the range of movement of the camera 54 and the camera platform 55 when the camera 54 is swiveled, preventing the camera 54 and the camera platform 55 from interfering with the third protective member 66. In addition, the height of the upper end of the third protective member 66 is positioned lower than the upper end 25a of the window frame of the window 25, ensuring rear visibility and making it easier to ensure an escape route when the operator escapes through the window 25. Furthermore, the height of the upper end of the third protective member 66 is adjusted to a position that is not within the field of view of the camera 54, preventing a part (upper end) of the third protective member 66 from appearing in the image captured by the camera 54 and interfering with the image captured by the camera 54.

[0054] [Variations] In the above embodiment, the camera protection device 60 is configured to include the first protective member 62, the second protective member 64, and the third protective member 66, but the present disclosure is not necessarily limited to an embodiment that includes all of these. For example, the camera protection device 60 may include only the first protective member 62, or only the third protective member 66. In short, it is sufficient for the camera protection device 60 to include at least one of the first protective member 62, the second protective member 64, and the third protective member 66.

[0055] Furthermore, in the above embodiment, the first protective member 62 is disposed so as to tightly surround the left and right sides and the rear of the camera 54. However, this does not necessarily mean that the first protective member 62 does not have to surround the camera 54 without any gaps. That is, in the first protective member 62, gaps may be formed between the left partition plate 62a and the rear partition plate 62c, and between the right partition plate 62b and the rear partition plate 62c. In other words, the left partition plate 62a, the right partition plate 62b, and the rear partition plate 62c may be formed as separate members. In this case, the first protective member 62 may be formed only with the left partition plate 62a arranged along the left side of the camera 54 and the right partition plate 62b arranged along the right side of the camera 54, or may be formed only with the rear partition plate 62c arranged along the rear of the camera 54.

[0056] In the above embodiment, the first protective member 62, the second protective member 64, and the third protective member 66 are each formed as separate members, but they may be connected to each other to form an integrated structure. For example, the first protective member 62 and the second protective member 64 may be formed as an integrated structure by arranging the second protective member 64 so as to cover the top of the first protective member 62.

[0057] Furthermore, in the above embodiment, the second protective member 64 is disposed vertically above the camera 54, but it may also include a portion disposed vertically below the camera 54. Alternatively, the second protective member 64 may be formed only from a portion disposed vertically below the camera 54. In short, the second protective member 64 may be any member that prevents an object from colliding with the camera 54 from the vertical direction.

[0058] In addition, in the above embodiment, the third protective member 66 is formed in a trapezoidal shape when viewed from the front, but the shape of the third protective member 66 is not limited to a trapezoidal shape. The shape of the third protective member 66 may be, for example, a rectangular shape or a triangular shape. In short, the shape of the second protective member 64 can be freely changed as long as it can collide with the headrest 40 when the driver's seat 34 moves rearward.

[0059] Furthermore, in the above embodiment, the first box member 55b of the camera head 55 is disposed on the left side of the camera 54, but the first box member 55b may be disposed on the right side of the camera 54. Furthermore, the structure of the camera head 55 is not limited to that of the above embodiment. In short, the structure of the camera head 55 may be freely changed as long as it is configured to support the camera 54 so that it can swing up and down and left and right. [Explanation of symbols]

[0060] 24: Back wall 25: Window 25a: Upper end of window frame 32: Control room 50: Space behind the driver's seat (space) 54: Camera 55: Pan head 60: Camera protection device 62: First protective member (first member) 64: Second protective member (second member) 66: Third protective member (third member) 100:Work machinery

Claims

1. A camera protection device for protecting a camera installed in a space formed in an operator's compartment of a work machine, A camera protection device comprising a protection portion disposed around at least a portion of the periphery of the camera.

2. The camera protection device according to claim 1 , wherein the space is formed between a rear end of a driver's seat and a rear wall of the control room.

3. 2. The camera protection device according to claim 1, wherein the height of an upper end of the protection part is located lower than an upper end of a window frame of a window formed in a rear wall of the operation room.

4. The camera is supported on a pan head that allows the orientation of the camera to be changed, The camera protection device according to claim 1 , wherein the protection section is disposed outside the movable range of the camera and the camera platform.

5. The camera protection device according to claim 1 , wherein the protection part is disposed at a position that is not within the field of view of the camera. Camera protection device.

6. The camera protection device of claim 1 , wherein the protection portion includes portions disposed along left and right sides of the camera.

7. The camera protection device of claim 6 , wherein the protection portion includes a portion disposed along a rear portion of the camera.

8. The camera protection device according to claim 1 , wherein the protection portion includes a portion disposed forward of the camera.

9. The space is formed between a rear end of a driver's seat having a headrest with a movable range that can be moved back and forth and a rear wall of the operation room, The camera protection device according to claim 8 , wherein the portion is disposed at a position corresponding to a rear end of the range of motion of the headrest.

10. The protective part is At least one of a first member disposed along a left side, a right side, and a rear side of the camera and a third member disposed forward of the camera; The camera protection device according to any one of claims 1 to 9, further comprising: a second member disposed above and / or below the camera.

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