Work machine

Abstract

Provided is a work machine with which it is possible to sufficiently grasp the situation around a machine body from an image that is captured by a camera.　A work machine (1) comprises a machine body (2), a work device (4) that is attached to the machine body (2), and cameras (70, 80) that are capable of capturing images of the outer lower portion of the machine body (2). The cameras (70, 80) are arranged at first positions where light incident portions (70a, 80a) for taking in at least light from the outside protrude outward from the outer edge of the machine body (2) in top view.

Description

Work machine

[0001] The present invention relates to a work machine such as a backhoe.

[0002] Conventionally, a work machine disclosed in Patent Document 1 below is known. The work machine disclosed in Patent Document 1 includes a machine body, a work device attached to the machine body, and a camera capable of photographing the lower outside of the machine body.

[0003] Japanese Patent Publication "JP-A-2021-4491"

[0004] In the case of the above-described work machine, the camera is disposed on the upper part of the machine body facing downward outside, and is located at a position that does not protrude outside the outer edge of the machine body. Therefore, since a part of the machine body is reflected in the photographed image of the camera, it may not be possible to sufficiently grasp the situation around the machine body (particularly, near the lower part of the machine body) from the photographed image.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide a work machine capable of sufficiently grasping the situation around the machine body from a photographed image of a camera.

[0006] A work machine according to an embodiment of the present invention includes a machine body, a work device attached to the machine body, and a camera capable of photographing the lower outside of the machine body, and the camera is disposed at a first position where at least a light incident portion for taking in light from the outside protrudes outside the outer edge of the machine body in a top view.

[0007] According to the work machine of the present invention, since the camera is disposed at a position where at least the light incident portion for taking in light from the outside protrudes outside the outer edge of the machine body in a top view, it is difficult for the machine body to be reflected in the photographed image of the camera, and it is possible to sufficiently grasp the situation around the machine body from the photographed image of the camera.

[0008] This is a right side view of the work machine. This is a front view of the work machine. This is a top view of the work machine. This figure shows the bonnet (door) in the open position. This is a perspective view of the bonnet (door). This is a perspective view showing the locking mechanism, lock mechanism, and guide mechanism. This is a longitudinal cross-sectional view of the bonnet (door) in the closed position. This is a perspective view of the outer wall seen from the inner side. This is an enlarged longitudinal cross-sectional view of the bonnet (door) in the open position. This is a perspective view of the inner wall seen from the outer side. This is an enlarged longitudinal cross-sectional view of the bonnet (door) in the closed position. This figure shows the camera case and camera attached to the work machine. This figure shows the inside of the camera case in Figure 12. This is a front view showing a part of the machine with a camera attached to the second bonnet. This is a top view showing a part of the machine with a camera attached to the second bonnet and a part of the travel device. This is a front view showing an example of the shooting range of the camera attached to the second bonnet. This is a top view showing the camera attached to the second bonnet moving from the first position to the second position (forward position). This is a top view showing the camera attached to the second bonnet moving from the first position to the second position (rear position). This is a right side view showing another embodiment (second embodiment) of the work machine. This is a top view showing another embodiment (second embodiment) of the work machine. This is a side view showing part of the machine body, etc., with a camera attached to the cover above the weight. This is a top view showing part of the machine body and part of the traveling device, with a camera attached to the cover above the weight. This is a side view showing an example of the shooting range of the camera attached to the cover above the weight. This is a top view showing the camera attached to the cover above the weight moving from a first position to a second position (left position). This is a top view showing the camera attached to the cover above the weight moving from a first position to a second position (right position). This is a perspective view showing the camera, bracket, support, etc. This is a top view showing the configuration and operation of the support, including a rotation support mechanism and a holding mechanism. This is a cross-sectional view showing the configuration and operation of the support, including a rotation support mechanism and a holding mechanism. This is a top view showing the configuration and operation of the support, including a rotation support mechanism and a holding mechanism. This is a cross-sectional view showing the configuration and operation of the support, including a rotation support mechanism and a holding mechanism. This is a diagram showing a modified example of a closing maintenance mechanism that maintains the closed state of the bonnet door. This is an enlarged view of a modified example of a closing maintenance mechanism.This is a partial cross-sectional plan view showing the door in a closed state maintained by the closing mechanism. This is a partial cross-sectional plan view showing the door in a released state due to the closing mechanism.

[0009] Hereinafter, preferred embodiments of the present invention will be described with appropriate reference to the drawings. In this embodiment, a backhoe, which is a slewing work machine, is exemplified as the work machine 1. However, the work machine 1 is not limited to a backhoe.

[0010] Figure 1 is a right side view of the work machine 1. Figure 2 is a front view of the work machine 1. Figure 3 is a top view of the work machine 1. As shown in Figures 1 to 3, the work machine 1 comprises a machine body (turntable) 2, a traveling device 3, and a work device 4. Note that in Figure 2, a part of the work device 4 is omitted, and in Figure 3, the work device 4 is omitted.

[0011] The machine body 2 is equipped with a driver's seat 7 in which the operator (driver) sits, and a cabin 8 which is a driver's seat protector that protects the driver's seat 7. However, the work machine 1 may have a canopy instead of a cabin 8 as a driver's seat protector.

[0012] In the following, the direction towards the front of the operator seated in the operator's seat 7 of the work machine 1 (arrow A1 direction) will be described as the front, and the direction towards the rear of the operator (arrow A2 direction) will be described as the rear. The direction towards the left of the operator (arrow B1 direction) will be described as the left, and the direction towards the right of the operator (arrow B2 direction) will be described as the right. The horizontal direction (left-right direction), which is perpendicular to the front-rear direction K1, will be described as the machine width direction K2. The direction from the center of the machine body 2 toward the right or left will be described as the machine outward direction, and the direction opposite to the machine outward direction will be described as the machine inward direction. In other words, the machine outward direction is the machine width direction and is the direction away from the center of the machine width direction, and the machine inward direction is the machine width direction and is the direction approaching the center of the machine width direction.

[0013] The running gear 3 is a crawler-type running gear that supports the machine body 2 so that it can move. The running gear 3 has a left running gear 3L that supports the lower left part of the machine body 2 and a right running gear 3R that supports the lower right part of the machine body 2. In this embodiment, a crawler-type running gear 3 is used, but the running gear 3 is not limited to this, and a wheel-type running gear or the like may also be used. A dozer device 9 is mounted on the front of the running gear 3.

[0014] As shown in Figure 1, the aircraft body 2 is supported on the running gear 3 via a slewing bearing 10 so as to be able to rotatably around a slewing axis X1, which is an axis extending in the vertical direction. As shown in Figures 1 to 3, the cabin 8 is mounted to the left of the center of the aircraft body 2 in the left-right direction (aircraft width direction) and in front of the center of the aircraft body 2 in the front-rear direction.

[0015] The front of the machine body 2 is provided with a support bracket 14 and a swing bracket 15 that support the work device 4. The support bracket 14 is provided so as to protrude forward from the machine body 2. The swing bracket 15 is attached to the front of the support bracket 14 so as to be able to swing around a vertical axis (an axis that extends in the vertical direction).

[0016] The working device 4 is mounted on the front of the machine body 2. The working device 4 has a boom 16, an arm 17, and a bucket 18. The base of the boom 16 is pivotally attached to the upper part of the swing bracket 15 so as to be rotatable around a horizontal axis (an axis extending in the machine body width direction K2). The arm 17 is pivotally attached to the tip side of the boom 16 so as to be rotatable around the horizontal axis. The bucket 18 is provided on the tip side of the arm 17 so as to be able to perform scooping and dumping operations.

[0017] The work device 4 can be fitted with other work tools (hydraulic attachments) that can be driven by a hydraulic actuator, either in place of or in addition to the bucket 18. Examples of other work tools include hydraulic breakers, hydraulic crushers, angle brooms, earth augers, pallet forks, sweepers, mowers, snow blowers, and the like.

[0018] The swing bracket 15 is made swingable by the extension and retraction of the swing cylinder C1. The boom 16 is made swingable by the extension and retraction of the boom cylinder C2. The arm 17 is made swingable by the extension and retraction of the arm cylinder C3. The bucket 18 is made capable of scooping and dumping operations by the extension and retraction of the bucket cylinder C4. The swing cylinder C1, boom cylinder C2, arm cylinder C3, and bucket cylinder C4 are composed of hydraulic cylinders (hydraulic actuators).

[0019] As shown in Figures 1 and 3, the aircraft body 2 includes a weight 12 that constitutes the rear of the aircraft body 2. The weight 12 is a counterweight for adjusting the front-to-rear weight balance with the work device 4 provided at the front of the aircraft body 2. Above the weight 12, a cover 13 is provided that constitutes the upper rear surface of the aircraft body 2. The cover 13 is located behind the cabin 8.

[0020] As shown in Figure 3, the prime mover 20 is mounted on the right side of the aircraft body 2. The prime mover 20 is located in a prime mover chamber 21 provided on the right side of the aircraft body 2. The prime mover 20 is a diesel engine. The prime mover 20 may also be a gasoline engine or an electric motor, or it may be a hybrid type having both an engine and an electric motor.

[0021] The work machine 1 is equipped with a bonnet 25 that covers the prime mover 20. The bonnet 25 covers the perimeter of the prime mover chamber 21 in which the prime mover 20 is located. The bonnet 25 includes a first bonnet 26, a second bonnet 27, and a third bonnet 28. The first bonnet 26 covers the side (right side) of the prime mover chamber 21. The second bonnet 27 covers the top of the prime mover chamber 21. The third bonnet 28 is located in front of the second bonnet 27 and covers the top and front of the prime mover chamber 21. An opening 29 is provided at the front of the first bonnet 26 for taking in outside air into the prime mover chamber 21.

[0022] The first bonnet 26 constitutes the outer surface (right side) of the aircraft body 2. As shown by arrow G1 in Figure 3, the first bonnet 26 is openable and closable. Specifically, the first bonnet 26 has a door 26a (see Figure 1), and the door 26a is openable and closable. In other words, a part of the first bonnet 26 (door 26a) is openable and closable.

[0023] Figure 4 shows the door 26a in the open position. The door 26a can be opened outward (to the right) from the main body 26b of the first bonnet 26, with its rear as the pivot point. By opening the door 26a, it is possible to access the engine compartment 21. However, the entire first bonnet 26 may be openable and closable.

[0024] As shown in Figures 4 and 5, a hinge member 24 is attached to the door 26a. The hinge member 24 is attached to the rear of the door 26a. The hinge member 24 has a cylindrical portion 24a that extends in the vertical direction. A support shaft (not shown) attached to the main body 26b is inserted into the cylindrical portion 24a. As a result, the door 26a of the bonnet 26 can be opened and closed relative to the main body 26b, with the support shaft as the pivot point.

[0025] As shown in Figures 4 to 6, the door 26a and the main body 26b are provided with a locking mechanism 30, a locking mechanism 33, and a guide mechanism 36. The locking mechanism 30 is a mechanism that locks the door 26a to the main body 26b when the door 26a is closed. The locking mechanism 30 has a locking member 31 provided on the door 26a and a locked member 32 provided on the main body 26b. The locking member 31 has a locking claw 31a and is rotatable about a horizontal axis 31b as a pivot point. When the locking member 31 rotates and the locking claw 31a descends, the locking claw 31a is locked to the locked member 32. When the locking member 31 rotates and the locking claw 31a rises, the locking of the locking claw 31a to the locked member 32 is released.

[0026] The locking mechanism 33 is a mechanism for maintaining the state in which the locking claw 31a is locked to the locked member 32. The locking mechanism 33 has a locking piece 34 provided on the door 26a and a second locked member 35 provided on the main body 26b. The locking piece 34 is rotatable in the vertical direction by turning a key inserted into the keyhole 33a. By rotating the locking piece 34, it is possible to change between a locked state in which it is locked to the second locked member 35 and an unlocked state in which the locking is released.

[0027] The guide mechanism 36 is a mechanism that guides the movement of the door 26a when it is opened and closed. The guide mechanism 36 has a guided member 37 provided on the door 26a and a guide member 38 provided on the main body 26b. The guided member 37 has a bifurcated upper portion 37a and a lower portion 37b. The guide member 38 has a rod that extends horizontally. When the door 26a is closed, the guide member 38 is inserted between the upper portion 37a and the lower portion 37b of the guided member 37. When the door 26a is opened, the guide member 38 detaches from between the upper portion 37a and the lower portion 37b of the guided member 37.

[0028] Hereinafter, the "door 26a," which is part of the first bonnet 26, will be referred to as "bonnet 26a." As shown in Figures 4, 5, and 7, the bonnet 26a has an outer wall 40 and an inner wall 50. The outer wall 40 constitutes the outer surface of the aircraft body 2. The inner wall 50 is provided inside the outer wall 40. The inner wall 50 is located on the side of the prime mover 20 (the inner side of the aircraft body). The outer wall 40 is located on the opposite side of the prime mover 20 (the outer side of the aircraft body) and constitutes the side of the aircraft body 2.

[0029] As shown in Figure 8, the outer wall 40 is provided with a hinge member 24, a locking member 31, a locking piece 34, and a guided member 37. The hinge member 24, locking member 31, locking piece 34, and guided member 37 are located on the outside of the inner wall 50. In other words, the hinge member 24, locking member 31, locking piece 34, and guided member 37 are located in positions that do not overlap with the inner wall 50. The hinge member 24 is located behind the inner wall 50. The locking member 31, locking piece 34, and guided member 37 are located in front of the inner wall 50.

[0030] As shown in Figures 7 and 9, the outer wall 40 and the inner wall 50 are spaced apart in the width direction K2 of the machine body. As a result, a space S1 is formed between the outer wall 40 and the inner wall 50. A biasing member 60 is interposed between the outer wall 40 and the inner wall 50 to apply a force to the inner wall 50 in a direction away from the outer wall 40 (inward within the machine body). In this embodiment, the biasing member 60 is a coil spring. However, the biasing member 60 is not limited to a coil spring as long as it is expandable and contractible (elastically deformable). The inner wall 50 is configured to move closer to and away from the outer wall 40 as the biasing member 60 expands and contracts.

[0031] As shown in Figures 5, 7, and 8, the biasing members 60 are arranged at multiple locations near the outer edge of the bonnet 26a (specifically, the outer wall 40). In this embodiment, the biasing members 60 are arranged at four locations near the four corners of the roughly rectangular bonnet 26a. In other words, there are four biasing members 60. However, the number of biasing members 60 can be changed according to the size and shape of the bonnet 26a, and is not limited to four; there may be five or more, or three or fewer.

[0032] A cylindrical body 41 is attached to the outer wall 40. The cylindrical body 41 is formed in a cylindrical shape. The cylindrical body 41 protrudes from the inner surface 40a of the outer wall 40 toward the inner wall 50. The cylindrical body 41, together with the pin 42 described later, restricts the range of movement (stroke range) of the rod 51, which will be described later.

[0033] The cylindrical bodies 41 are positioned near the biasing members 60. The number of cylindrical bodies 41 corresponds to the number of biasing members 60. In this embodiment, since there are four biasing members 60, there are also four cylindrical bodies 41.

[0034] As shown in Figure 9, the biasing member 60, a coil spring 60, is interposed between the cylindrical body 41 and the inner wall 50. One end of the coil spring 60 abuts against the end face of the cylindrical body 41 on the inner wall 50 side. The other end of the coil spring 60 abuts against the outer surface 50a of the inner wall 50.

[0035] The cylindrical body has an elongated hole 41a that extends in the width direction K2 of the machine body. The elongated hole 41a is formed in two opposing locations (upper and lower) of the cylindrical body 41. A pin 42 is inserted into the elongated hole 41a. The pin 42 passes through the elongated hole 41a and the rod 51 in the vertical direction.

[0036] As shown in Figure 10, a rod 51 is attached to the inner wall 50. The rod 51 has a through hole 51a through which a pin 42 passes. The rod 51 protrudes from the outer surface 50a of the inner wall 50 toward the outer wall 40. The rod 51 is movable along the inner surface of the cylindrical body 41. As shown in Figures 7 and 9, the rod 51 is inserted into a coil spring 60, which is a biasing member 60. When the inner wall 50 moves closer to or further away from the outer wall 40, the rod 51 moves together with the inner wall 50. The coil spring 60 expands and contracts in accordance with the movement of the rod 51. The number of rods 51 corresponds to the number of biasing members 60. In this embodiment, since there are four biasing members 60, there are also four rods 51.

[0037] As shown in Figures 4, 5, 7, 9, and 10, a sealing member 61 is attached around the inner wall 50. In this embodiment, the sealing member 61 is a trim (trim seal) 61. The trim 61 is attached so as to surround the outer circumference of the inner wall 50. The trim 61 is made of an elastically deformable material such as rubber. As shown in Figure 9, the trim 61 has a mounting portion 61a attached around the inner wall 50 and a cylindrical portion 61b formed integrally with the mounting portion 61a. The cylindrical portion 61b is located on the inside of the inner wall 50 (opposite the outer wall 40 side).

[0038] The trim 61 is positioned between the aircraft body 2 and the bonnet 26a. More specifically, the trim 61 is positioned between the surrounding wall 2b of the aircraft body 2 (see Figure 4), which will be described later, and the bonnet 26a. The trim 61 is positioned so that it is sandwiched between the inner wall 50 and the aircraft body 2 (more specifically, the surrounding wall 2b) when the bonnet 26a is closed.

[0039] In this embodiment, the trim 61 is attached to the inner wall 50 and deforms in close contact with the inner wall 50 and the surrounding wall 2b when the bonnet 26a is closed. However, the trim 61 may also be attached to the surrounding wall 2b and deform in close contact with the inner wall 50 and the surrounding wall 2b when the bonnet 26a is closed.

[0040] As shown in Figures 7 and 9, the bonnet 26a is provided with a support mechanism 62 between the outer wall 40 and the inner wall 50 that supports the inner wall 50 relative to the outer wall 40. The support mechanism 62 has a support cylinder 63 attached to the outer wall 40 and an insertion member 64 attached to the inner wall 50 and inserted into the support cylinder 63. The insertion member 64 is movable along the inner surface of the support cylinder 63, and the insertion member 64 and the support cylinder 63 function as guide members that restrict the direction of movement of the inner wall 50 relative to the outer wall 40 (the direction of approach to and separation of the inner wall 50 relative to the outer wall 40). The cylindrical body 41 and rod 51 described above may also function as guide members that restrict the direction of movement of the inner wall 50 relative to the outer wall 40, in which case the support mechanism 62 may be omitted.

[0041] As shown in Figure 8, the support cylinders 63 are positioned near the cylindrical body 41 and the biasing members 60. The support cylinders 63 protrude from the inner surface 40a of the outer wall 40 toward the inner wall 50. The number of support cylinders 63 corresponds to the number of biasing members 60. In this embodiment, since there are four biasing members 60, there are also four support cylinders 63.

[0042] As shown in Figure 10, the insertion members 64 are positioned near the rod 51. The insertion members 64 protrude from the outer surface 50a of the inner wall 50 toward the outer wall 40. The number of insertion members 64 corresponds to the number of support cylinders 63. In this embodiment, since there are four support cylinders 63, there are also four insertion members 64.

[0043] As shown in Figures 7 and 9, the inner wall 50 is supported by the outer wall 40 when the support cylinder 63 is inserted into the insertion member 64. This prevents the inner wall 50 from falling. However, the configuration of the support mechanism 62 is not limited to the illustrated configuration, as it is a mechanism that can support the inner wall 50 so that it can move closer to and further away from the outer wall 40.

[0044] As shown in FIG. 4, the aircraft body 2 has an opening 2a covered when the bonnet 26a is closed, and a peripheral wall 2b provided around the opening 2a. One surface (outer surface) of the peripheral wall 2b faces the outside of the aircraft body, and the other surface (inner surface) faces the inside of the aircraft body. The opening 2a communicates with the inside of the prime mover chamber 21. Therefore, when the bonnet 26a is opened, access can be made to the inside of the prime mover chamber 21 through the opening 2a.

[0045] FIG. 9 shows the state in which the bonnet 26a is opened, and FIG. 11 shows the state in which the bonnet 26a is closed. As shown in FIG. 9, in the state where the bonnet 26a is opened, the trim 61 attached to the inner wall 50 is separated from the peripheral wall 2b (not shown in FIG. 9) provided on the aircraft body 2. In this state, no force is applied to deform the trim 61. Therefore, the trim 61 is not deformed. Specifically, the cylindrical portion 61b of the trim 61 maintains its original shape (cylindrical shape) without being crushed.

[0046] In the state where the bonnet 26a is opened, the biasing member (coil spring) 60 applies a force F1 in a direction away from the outer wall 40 with respect to the inner wall 50. Due to this force F1, the distance D1 between the inner surface 40a of the outer wall 40 and the outer surface 50a of the inner wall 50 is the maximum distance. Only the vicinity of the tip (the end on the outer wall 40 side) of the rod 5 is inserted into the cylindrical body 41. The pin 42 is located at the end on the inner wall 50 side of the long hole 41a. The pin 42 functions as a stroke restricting member that restricts the movement range of the rod 51 with respect to the cylindrical body 41, and prevents the rod 51 from coming out of the cylindrical body 41 due to the action of the force F1.

[0047] As shown in FIG. 11, when the bonnet 26a is closed, the trim 61 deforms in close contact with the peripheral wall 2b. Specifically, the cylindrical portion 61b of the trim 61 is flattened and crushed in close contact with the peripheral wall 2b. Thereby, the sealing property (airtightness) between the bonnet 26a and the peripheral wall 2b is ensured. In this state, the locking claw 31a (see FIG. 6) is locked to the locked member 32 (see FIG. 8).

[0048] When the bonnet 26a is changed from the open state (see FIG. 9) to the closed state (see FIG. 11), the rod 51 moves along the cylinder 41 toward the outer wall 40 side and is deeply inserted into the cylinder 41. Along with the movement of the rod 51, the pin 42 moves toward the end on the outer wall 40 side of the long hole 41a. The biasing member (coil spring) 60 shortens as the rod 51 moves. The insertion member 64 moves along the support cylinder 63 toward the outer wall 40 side and is deeply inserted into the support cylinder 63. As a result, the distance D1 between the inner surface 40a of the outer wall 40 and the outer surface 50a of the inner wall 50 decreases. That is, the inner wall 50 approaches the outer wall 40.

[0049] When the bonnet 26a is closed, the biasing member 60 applies a pressing force that uniformly presses the trim 61 against the peripheral wall 2b via the inner wall 50. Specifically, when the bonnet 26a is changed from the open state to the closed state, when the trim 61 abuts against the peripheral wall 2b, the biasing member 60 corresponding to the abutted portion receives a reaction force from the peripheral wall 2b and is compressed. As a result, the inner wall 50 moves relative to the outer wall 40, and the force F2 with which the biasing member 60 attempts to extend is uniformly transmitted over the entire circumference of the trim 61 via the inner wall 50, and a pressing force that absorbs the dimensional error of the parts of the bonnet 26a and the body 2 and deforms the trim 61 acts uniformly on the entire trim 61.

[0050] Thus, when the bonnet 26a is closed, since the pressing force that deforms the trim 61 by the biasing member 60 is uniformly applied to the entire circumference of the trim 61, when the operator closes the bonnet 26a, the force required to deform the trim 61 can be small and can be uniformly applied to the entire trim 61. Therefore, the force required when the operator closes the bonnet 26a can be reduced, and the sealing performance can be improved.

[0051] Because the bonnet 26a that opens and closes the engine compartment 21 has a large surface area, the trim 61 fitted around the bonnet 26a is also large. As a result, the amount of deformation required for the trim 61 to close the bonnet 26a is larger, and the elastic rebound force of the trim 61 that occurs as a result of the deformation is larger. Consequently, the force required to deform the trim 61 by the amount required when closing the bonnet is larger, and the force required to close the bonnet 26a is larger. As a result, if the force of the operator closing the bonnet 26a is weak, there is a risk that the bonnet 26a may not be able to be closed properly.

[0052] However, in the case of the work machine 1 of this embodiment, as described above, when the operator closes the bonnet 26a, the force required to deform the trim 61 is small, thus reducing the force required to close the bonnet 26a. As a result, even if the operator's force to close the bonnet 26a is insufficient, the bonnet 26a can be reliably closed. In addition, because the force required to open and close the bonnet 26a is stabilized by the action of the biasing member 60, excessive force is prevented from being applied when opening and closing the bonnet 26a, thus preventing damage to the bonnet 26a.

[0053] Furthermore, when the bonnet 26a is closed, the force acting on the trim 61 from the biasing member 60 is constant, making it possible to stably press the trim 61 against the surrounding wall 2b and ensuring high sealing performance. Also, when the bonnet 26a is closed, a pressing force is applied to the trim 61 from the biasing member 60, which suppresses the force that causes the trim 61 to try to return to its original state from its deformed state. As a result, the force required to lock the locking claw 31a against the locked member 32 is small, which prevents the locking mechanism 30 from becoming more complex or larger.

[0054] The bonnet having an outer wall 40, an inner wall 50, and a biasing member 60 described in the above embodiment is the bonnet 26a that constitutes the side of the machine body 2, but it may also be a bonnet that constitutes another surface of the machine body 2 (for example, the rear surface or the top surface). For example, in the case of a work machine 1 in which the prime mover 20 is located at the rear of the machine body 2, the bonnet that constitutes the rear surface or the rear top surface of the machine body 2 can be a bonnet having an outer wall 40, an inner wall 50, and a biasing member 60 (a bonnet having the same configuration as bonnet 26a).

[0055] In the above embodiment, a rod 51 inserted into a coil spring 60 is attached to the inner wall 50, and a cylindrical body 41 protruding toward the inner wall 50 is attached to the outer wall 40. However, the rod 51 inserted into the coil spring 60 may be attached to the outer wall 40, and the cylindrical body 41 protruding toward the outer wall 40 may be attached to the inner wall 50.

[0056] As shown in Figures 1 to 3, the work machine 1 is equipped with a camera 70. The camera 70 is capable of photographing the lower outside of the machine body 2. Specifically, the camera 70 is capable of photographing the lower right side of the machine body 2. The camera 70 is mounted on the second bonnet 27. More specifically, the camera 70 is mounted near the right edge of the upper surface of the second bonnet 27.

[0057] As shown in Figures 12 and 13, the camera 70 is housed in a camera case 71. The camera case 71 has an opening 71a. The light-receiving part 70a of the camera 70 is positioned facing the opening 71a. The light-receiving part 70a is the part that takes in light from the outside. More specifically, the light-receiving part 70a is the part that takes in light (light that generates an image) into the camera 70 when taking a picture, and specifically includes a lens (a light-gathering lens). The camera 70 can take a picture by taking in light that has passed through the opening 71a into the interior through the light-receiving part 70a. The light-receiving part 70a is positioned facing outward and downward. Specifically, the light-receiving part 70a is positioned facing downward and to the right.

[0058] As shown in Figure 13, the camera 70 is attached to the bracket 72. The bracket 72 is attached to a mounting base 27a provided on the second bonnet 27. The mounting base 27a protrudes upward in a columnar shape from the upper surface of the second bonnet 27. The bracket 72 is attached to the upper part of the mounting base 27a.

[0059] As shown in Figure 13, the bracket 72 has a pair of mounting plates 72a, 72a that are spaced apart. The camera 70 is positioned between the pair of mounting plates 72a, 72a. A support shaft 72b extending horizontally is attached to the mounting plate 72a. The support shaft 72b extends in the front-rear direction, straddling the pair of mounting plates 72a, 72a. The camera 70 is supported by the support shaft 72b and is rotatable around the axis of the support shaft 72b. This allows the camera 70 to adjust the orientation of the light-receiving section 70a as needed.

[0060] As shown in Figure 13, the work machine 1 is equipped with a support 73 that supports the bracket 72 on the machine body 2. The support 73 supports the bracket 72 on the mounting base 27a. The support 73 has a rotation support mechanism 85 that supports the bracket 72 so that it can rotate around its vertical axis, and a holding mechanism 86 that can hold the bracket 72 in a state where the camera 70 is in a first position and a second position. The configurations of the rotation support mechanism 85 and the holding mechanism 86 will be described in detail later.

[0061] Figures 1 to 3 show the camera 70 in its first position. Figure 14 is a magnified view of part of Figure 2, and Figure 15 is a magnified view of part of Figure 3. When the camera 70 is in its first position, in a top view, at least the light-receiving portion 70a protrudes outward from the outer edge of the aircraft body 2 (see Figure 15). In addition, the light-receiving portion 70a is positioned facing outward and downward from the aircraft body (see Figure 14). As a result, the camera 70 can photograph the area below and outside the aircraft body 2.

[0062] Specifically, when the camera 70 is positioned in the first position, the light-receiving portion 70a protrudes outward (to the right) from the outer edge (right edge) of the first bonnet 26, which is a side bonnet that forms the side of the aircraft body 2. In addition, the light-receiving portion 70a is positioned facing downward to the right. As a result, the camera 70 is able to photograph the lower right side of the first bonnet 26.

[0063] Figure 16 shows an example of the shooting range R1 of a camera 70 positioned in a first location. By positioning the camera 70 in a first location where the light-receiving part 70a protrudes to the right of the right edge of the first bonnet 26, it is possible to prevent the first bonnet 26 from entering the shooting range R1 of the camera 70. Therefore, the camera 70 can photograph the area immediately to the lower right of the first bonnet 26. This prevents the creation of a blind spot immediately to the right of the first bonnet 26 that is not included in the shooting range R1.

[0064] As shown in Figure 16, when the camera 70 is in the first position, the shooting range R1 includes at least a portion of the running gear (right running gear 3R). More specifically, when the camera 70 is in the first position, the shooting range R1 includes a portion of the crawler of the crawler-type running gear (at least a portion of the track). This allows the operator to intuitively and quickly grasp the position of the work machine 1 in the width direction of the machine body from the image captured by the camera 70 (an image showing a portion of the crawler). Therefore, for example, it becomes possible to easily and accurately perform actions such as moving the machine body 2 to the side.

[0065] As shown in Figures 17 and 18, the camera 70 is capable of rotating around an axis Z1 that extends in the vertical direction. By rotating around the axis Z1 that extends in the vertical direction, the camera 70 can move between a first position and a second position. The camera 70 rotates together with the camera case 71.

[0066] In Figures 17 and 18, the camera 70 and camera case 71 in the first position are shown by dashed lines (two-dotted lines), and the camera 70 and camera case 71 in the second position are shown by solid lines. The first position is the position shown in Figures 1 to 3. The second position is the position in which the camera 70 (specifically, the light-receiving part 70a) does not protrude outward from the outer edge of the aircraft body 2 when viewed from above. In this embodiment, the second position is the position rotated 90° around the vertical axis Z1 relative to the first position.

[0067] The second position includes one position (see Figure 17), which is a position rotated in one direction from the first position, and another position (see Figure 18), which is a position rotated in the opposite direction from the first position. In the embodiments shown in Figures 17 and 18, one position is the forward position, which is a position rotated forward from the first position. The other position is the rear position, which is a position rotated backward from the first position.

[0068] As shown in Figures 17 and 18, when the camera 70 is in the second position (indicated by the solid line), the entire camera 70 and camera case 71 are positioned to overlap with the aircraft body 2 (specifically, the second bonnet 27) in a top view. Therefore, when the camera 70 is in the second position, the camera 70 and camera case 71 are positioned so that they do not protrude outward from the outer edge of the aircraft body 2 in a top view.

[0069] Figures 19 and 20 show another embodiment (second embodiment) of the work machine 1. The work machine 1 of the second embodiment is equipped with a camera 80 located at the rear of the machine body 2. Although the work machine 1 of the second embodiment is equipped with cameras 70 and 80, it may be equipped with only camera 80.

[0070] The camera 80 is mounted on a cover 13 positioned above the weight 12. The cover 13 is located behind the cabin 8 and forms the upper rear surface of the aircraft 2. The camera 80 is housed in a camera case 81. The configuration of the camera 80 and camera case 81 is the same as that of the camera 70 and camera case 71.

[0071] The light-receiving part of the camera 80 is positioned facing an opening in the camera case 81, and is positioned facing outward and downward (specifically, rearward and downward) from the aircraft. Like the camera 70, the camera 80 is mounted on a bracket and supported by a support. The configuration of the bracket and support is as described above. The bracket is attached to a mounting base 13a (see Figure 21) provided on the cover 13. The mounting base 13a protrudes upward in a columnar shape from the upper surface of the cover 13.

[0072] Figures 19 and 20 show the camera 70 in its first position. Figure 21 is a magnified view of part of Figure 19, and Figure 22 is a magnified view of part of Figure 20. When the camera 80 is in the first position, at least the light-receiving portion 80a protrudes from the outer edge of the weight 12 in a top view (see Figure 22). More specifically, in a top view, the light-receiving portion 80a protrudes behind the rear edge of the weight 12. Also, the light-receiving portion 80a is positioned facing downward and rearward (see Figure 21). As a result, the camera 80 can photograph the area below and outside the weight 12 (more specifically, below near the rear).

[0073] Figure 23 shows an example of the shooting range R2 of a camera 80 positioned in a first location. By positioning the camera 80 in a first location where the light-receiving part 80a protrudes behind the rear edge of the weight 12, it is possible to prevent the weight 12 from entering the shooting range R2 of the camera 80. Therefore, the camera 80 can photograph the area immediately behind and below the weight 12. This prevents the creation of a blind spot immediately behind the weight 12 that is not included in the shooting range R2.

[0074] As shown in Figures 24 and 25, the camera 80 is capable of rotating around an axis Z2 that extends downward. By rotating around the axis Z2 that extends vertically, the camera 80 can move between a first position and a second position. The camera 80 rotates together with the camera case 81.

[0075] In Figures 24 and 25, the camera 80 and camera case 81 in the first position are shown by dashed lines (two-dot dashed lines), and the camera 80 and camera case 81 in the second position are shown by solid lines. The first position is the position shown in Figures 19 and 20. The second position is the position in which the camera 80 does not protrude outward from the outer edge of the aircraft body 2 when viewed from above. In this embodiment, the second position is the position rotated 90° around the vertical axis Z2 relative to the first position.

[0076] The second position includes one position (see Figure 24), which is a position obtained by rotating in one direction from the first position, and another position (see Figure 25), which is a position obtained by rotating in the opposite direction from the first position. In the embodiments shown in Figures 24 and 25, one position is the left position, which is a position obtained by rotating to the left from the first position. The other position is the right position, which is a position obtained by rotating to the right from the first position.

[0077] As shown in Figures 24 and 25, when the camera 80 is in the second position, the entire camera 80 and camera case 81 are positioned to overlap with the aircraft body 2 (specifically, the cover 13) when viewed from above. Therefore, when the camera 80 is in the second position, the camera 80 and camera case 81 are positioned so that they do not protrude outward from the outer edge of the aircraft body 2 when viewed from above.

[0078] The work machine 1 equipped with the above-described cameras 70 and 80 can photograph the area below the outer edge of the machine body 2 by positioning the cameras 70 and 80 in a first position. As shown in Figures 3 and 20, a display device 90 capable of displaying images captured by the cameras 70 and 80 is provided near the driver's seat 7 (to the right and front). The operator seated in the driver's seat 7 can check the condition below the outer edge of the machine body 2 by viewing the images captured by the cameras 70 and 80 displayed on the screen of the display device 90.

[0079] By positioning the cameras 70 and 80 in a second position, the work machine 1 can prevent objects from colliding with the cameras 70 and 80 when the work machine 1 is moving or operating. Furthermore, when storing the work machine 1, the work machine 1 can be made more compact by moving the cameras 70 and 80 to the second position, thus preventing an increase in the space required for storage of the work machine 1 due to the installation of the cameras 70 and 80.

[0080] When the machine 1 is rotated with cameras 70 and 80 in the first position, there is a risk that an object may strike the camera cases 71 and 81. If the camera cases 71 and 81 strike an object, the cameras 70 and 80 will indirectly strike the object through the camera cases 71 and 81 and will receive an external force from the object. Thus, when the cameras 70 and 80 are struck by an object and receive an external force due to the rotation of the machine 2 while in the first position, the cameras 70 and 80 can move to the second position.

[0081] For example, when camera 70 is in the first position and receives an external force from the rear, it can move to the forward position (second position) as shown by arrow E1 in Figure 17. When camera 70 is in the first position and receives an external force from the front, it can move to the rear position (second position) as shown by arrow E2 in Figure 18. When camera 80 is in the first position and receives an external force from the right, it can move to the left position (second position) as shown by arrow E3 in Figure 24. When camera 80 is in the first position and receives an external force from the left, it can move to the right position (second position) as shown by arrow E4 in Figure 25.

[0082] In this way, by moving from the first position to the second position when the cameras 70 and 80 are subjected to an external force, it is possible to reduce the damage that the cameras 70 and 80 suffer when subjected to an external force, and to prevent damage to the cameras 70 and 80. In addition, it is possible to prevent the cameras 70 and 80 from hindering the turning of the aircraft 2.

[0083] The configurations of the rotation support mechanism 85 and the holding mechanism 86 will be described below.

[0084] In this embodiment, the rotation support mechanism 85 is composed of a swivel hinge 85. As shown in Figure 26, the swivel hinge 85 has a fixed plate 85a fixed to the upper surface of the mounting base 27a (or mounting base 13a) and a movable plate 85b that can rotate around an axis in the vertical direction relative to the fixed plate 85a. The movable plate 85b is positioned above the fixed plate 85a. Mounting plates 72a, 72a of the bracket 72 are fixed to the upper part of the movable plate 85b.

[0085] Bracket 72 is a bracket to which camera 70 or camera 80 is attached. When camera 70 is attached to bracket 72, bracket 72 is supported on mounting base 27a by support body 73. When camera 80 is attached to bracket 72, bracket 72 is supported on mounting base 13a by support body 73.

[0086] When the movable plate 85b rotates around its vertical axis relative to the fixed plate 85a, the bracket 72 and the cameras 70 and 80 also rotate around their vertical axes relative to the fixed plate 85a. As a result, the cameras 70 and 80 are rotatable around their vertical axes relative to the aircraft body 2. The camera cases 71 and 81 are fixed to the bracket 72, the movable plate 85b, or the cameras 70 and 80, and are rotatable together with the cameras 70 and 80 around their vertical axes relative to the aircraft body 2.

[0087] The support 73 has a holding mechanism 86 that can hold the bracket 72 in a state where the cameras 70 and 80 are in a first position and a second position. Figures 27 and 28 are explanatory diagrams showing the configuration and operation (function) of the support 73, including the rotation support mechanism 85 and the holding mechanism 86. Figures 27 and 28 schematically show the configuration of the support 73. Figure 28(a) shows the A-A cross section of Figure 27(a). Figure 28(b) shows the B-B cross section of Figure 27(b). Figure 28(c) shows the C-C cross section of Figure 27(c).

[0088] In this embodiment, the holding mechanism 86 is composed of a detent mechanism 86. The detent mechanism 86 has a recess 86a formed on the upper surface of the fixed plate 85a of the swivel hinge 85, an elastic body 86b extending downward from the lower surface of the movable plate 85b of the swivel hinge 85, and a sphere 86c provided at the lower end of the elastic body 86b.

[0089] The recess 86a is spherically concave. Multiple recesses 86a are provided at equal angular intervals around the center 85c of the fixing plate 85a. In the illustrated example, four recesses 86a are provided at 90° intervals around the center 85c of the fixing plate 85a. The diameter of the sphere 86c is larger than the diameter of the recess 86a. A portion of the lower part of the sphere 86c can fit into the recess 86a. The elastic body 86b is made of a spring that can expand and contract in the vertical direction. The elastic body 86b biases the sphere 86c downward.

[0090] Next, the operation (function) of the holding mechanism (detent mechanism) 86 will be explained. Figures 27 and 28(a) show the state in which the cameras 70 and 80 are in the first position. In this state, the lower part of the sphere 86c is fitted into the recess 86a. As a result, the position of the movable plate 85b relative to the fixed plate 85a is fixed. This holds the cameras 70 and 80, which are attached to the bracket 72 fixed to the movable plate 85b, in the first position.

[0091] In the state shown in Figure 27(a), when an external force in the direction of arrow J1 is applied to the camera case 71, the external force is transmitted to the bracket 72, and a force is applied to the movable plate 85b that attempts to rotate it in the direction of arrow J2. As a result, the elastic body 86b shortens and the sphere 86c detaches from the recess 86a (see Figure 28(b)), and the movable plate 85b rotates in the direction of arrow J2 (see Figure 27(b)). When the movable plate 85b rotates 90° around the center 85c of the fixed plate 85a, the sphere 86c fits into another recess 86a adjacent to the recess 86a in the rotation direction J2 in the state shown in (a) (see Figures 27 and 28(c)). This stops the rotation of the movable plate 85b relative to the fixed plate 85a. As a result, the cameras 70 and 80 attached to the bracket 72 fixed to the movable plate 85b are held in the second position (see Figure 27(c)).

[0092] Figures 29 and 30 show the case where an external force is applied to the bracket 72 in the opposite direction to the examples shown in Figures 27 and 28. Figure 30(a) shows the A-A cross section of Figure 29(a). Figure 30(b) shows the B-B cross section of Figure 29(b). Figure 30(c) shows the C-C cross section of Figure 29(c).

[0093] In the state shown in Figure 29(a), when an external force is applied to the camera case 71 in the direction of arrow J3, the external force is transmitted to the bracket 72, and a force is applied to the movable plate 85b that attempts to rotate it in the direction of arrow J4. As a result, the elastic body 86b shortens and the sphere 86c detaches from the recess 86a (see Figure 30(b)), and the movable plate 85b rotates in the direction of arrow J4 (see Figure 29(b)). When the movable plate 85b rotates 90° around the center 85c of the fixed plate 85a, the sphere 86c fits into another recess 86a adjacent to the recess 86a in the rotation direction J4 in the state shown in (a) (see Figures 29 and 30(c)). This stops the rotation of the movable plate 85b relative to the fixed plate 85a. As a result, the cameras 70 and 80 attached to the bracket 72 fixed to the movable plate 85b are held in the second position (see Figure 30(c)).

[0094] As described above, the holding mechanism 86 can hold the bracket 72 in both the first and second positions of the cameras 70 and 80. This prevents the cameras 70 and 80 from moving while shooting in the first position. It also prevents the cameras 70 and 80, which have moved to the second position, from returning to the first position when they should not.

[0095] In the embodiment described above, the holding mechanism 86 can hold the bracket 72 at three locations at 90° intervals around the vertical axis. However, this can be modified to allow holding at four or more locations or two locations at intervals different from 90° (for example, 30°, 45°, 60°, 120°, etc.). This can be changed by adjusting the number and position of the recesses 86a, elastic bodies 86b, and spheres 86c of the holding mechanism 86. This allows the position and number of positions where the camera 70 is held by the holding mechanism 86 to be changed. For example, the first position can be set to two or more locations, or the second position can be set to three or more locations.

[0096] Next, a modified example of the work machine 1 according to the above embodiment will be described. Figures 31 to 34 show a modified example of a mechanism that prevents the door 26a of the bonnet 26 from being opened relative to the main body 26b when the door 26a is closed, in other words, a mechanism that maintains the closed state of the door 26a (hereinafter referred to as the "closed-maintain mechanism"). The closed-maintain mechanism shown in Figures 31 to 34 differs from the closed-maintain mechanism (locking mechanism 30, etc.) shown in Figures 4 to 6. The differences between the closed-maintain mechanism 100 shown in Figures 31 to 34 and the mechanism shown in Figures 4 to 6 will be explained below.

[0097] Note that in Figure 31, some of the components shown in Figures 4 to 6 (hinge member 24, inner wall 50, biasing member 60, etc.) are omitted. Also, in Figure 32, the covering portion 140 shown in Figure 31 (the portion that covers the operating member 102, which will be described later, from the inside) is shown by dashed lines.

[0098] The closing maintenance mechanism 100 includes a movable body 101 provided on the door 26a and a fixing member 121 provided on the main body 26b. The fixing member 121 includes a first fixing member 122 and a second fixing member 123 attached to the first fixing member 122. The first fixing member 122 is plate-shaped and fixed to the main body 26b (see Figure 4). The second fixing member 123 is a rod-shaped member formed in a horizontal U-shape. The second fixing member 123 extends inward (to the left) and rearward from the first fixing member 122.

[0099] The movable body 101 includes an operating member 102, a first movable member 103, and a second movable member 104. A portion of the operating member 102 is exposed on the front side of the door 26a and is operated by an operator who opens and closes the door 26a. The operating member 102 is rotatable around a vertical axis 105 that extends in the vertical direction by the operator's operation.

[0100] The first movable member 103 is a substantially L-shaped member in plan view. One end of the first movable member 103 is connected to the back surface of the operating member 102. The second movable member 104 has a first portion 104a that extends in the front-rear direction when the door 26a is closed, and a second portion 104b that extends in the left-right direction when the door 26a is closed. The rear end of the first portion 104a is pivotally supported by the other end of the first movable member 103 via a pivot shaft 106 that extends in the vertical direction. The second portion 104b bends from the front end of the first portion 104a and extends outward (to the right) of the machine.

[0101] The closing and maintaining mechanism 100 includes a guide member 107 that guides the movement of the second movable member 104. The guide member 107 is formed to sandwich the first portion 104a of the second movable member 104 from both sides. As a result, the second movable member 104 is prevented from moving in the left-right direction and is able to move in the front-back direction guided by the guide member 107.

[0102] As shown in Figure 33, when the operating member 102 rotates inward (see arrow L1) around the vertical axis 105, the first movable member 103 rotates together with the operating member 102, and as a result of this rotation, the second movable member 104 is guided by the guide member 107 and moves forward (see arrow L2). At the position where it has moved forward, the second movable member 104 comes into contact with the second fixed member 123 from the rear. As a result, the door 26a becomes unable to be opened, and the closed state of the door 26a is maintained.

[0103] As shown in Figure 34, when the operating member 102 rotates outward around the vertical axis 105 (see arrow L3), the first movable member 103 rotates together with the operating member 102, and as a result of this rotation, the second movable member 104 is guided by the guide member 107 and moves backward (see arrow L4). At the position where it has moved backward, the second movable member 104 separates from the second fixed member 123. As a result, the door 26a becomes openable. In this way, by rotating the operating member 102, the door 26a changes from an openable state to an openable state.

[0104] The closed-maintaining mechanism 100 has a locking mechanism 130 that prevents the rotation of the operating member 102. The locking mechanism 130 has a locking piece 131 attached to the door 26a. The locking piece 131 can be rotated vertically by turning a key inserted into the keyhole 33a (see Figure 6) (see arrow L4 and the solid and dashed lines on the locking piece 131 in Figure 32).

[0105] The operating member 102 has an elongated hole 102a into which a locking piece 131 can be inserted. The locking piece 131 can be rotated to switch between a state in which it is inserted into the elongated hole 102a (see dashed line 131 in Figure 32) and a state in which it is detached from the elongated hole 102a (see solid line 131 in Figure 32). When the locking piece 131 is inserted into the elongated hole 102a, the operating member 102 cannot be rotated. When the locking piece 131 is detached from the elongated hole 102a, the operating member 102 can be rotated.

[0106] A preferred embodiment of the present invention provides a work machine 1 as described in the following items.

[0107] (Item A1) A work machine 1 comprising a machine body 2, an openable and closable bonnet 26a forming the outer surface of the machine body 2, and a sealing member (trim 61) disposed between the machine body 2 and the bonnet 26a, wherein the bonnet 26a has an outer wall 40 and an inner wall 50 provided inside the outer wall 40, the sealing member is disposed so as to be sandwiched between the inner wall 50 and the machine body 2 when the bonnet 26a is closed, the inner wall 50 is configured to move toward and away from the outer wall 40, and a biasing member 60 is interposed between the outer wall 40 and the inner wall 50 to apply a force to the inner wall 50 in a direction away from the outer wall 40.

[0108] With this work machine 1, a biasing member 60 interposed between the outer wall 40 and the inner wall 50 applies a force to the inner wall 50 in a direction away from the outer wall 40. Therefore, when a sealing member (such as a trim 61) is interposed between the bonnet 26a and the machine body 2, the inner wall moves relative to the outer wall when closing the bonnet, absorbing dimensional errors in the parts and allowing the entire sealing member to be pressed with a uniform pressure with a small operating force. This reduces the force required to close the bonnet and improves the sealing performance.

[0109] (Item A2) The machine body 2 has an opening 2a that is covered when the bonnet 26a is closed, and a surrounding wall 2b provided around the opening 2a, the sealing member is attached to the inner wall or the surrounding wall and deforms in close contact with the inner wall 50 and the surrounding wall 2b when the bonnet 26a is closed, and the biasing member 60 applies a pressing force that presses the sealing member against the surrounding wall 2b via the inner wall 50 when the bonnet 26a is closed, the work machine 1 according to Item A1.

[0110] According to this work machine 1, when the bonnet 26a is closed, the biasing member 60 applies a pressing force that presses the sealing member against the surrounding wall 2b via the inner wall 50. This reduces the force required to close the bonnet 26a and improves the sealing performance.

[0111] (Item A3) The biasing member 60 is arranged at multiple locations near the outer edge of the bonnet 26a, as described in Item A1 or A2.

[0112] With this work machine 1, multiple biasing members 60 can apply a force to the inner wall 50 in a direction away from the outer wall 40 in a substantially uniform manner.

[0113] (Item A4) The work machine 1 according to any one of items A1 to A3, wherein a support mechanism 62 is provided between the outer wall 40 and the inner wall 50 to support the inner wall 50 with respect to the outer wall 40.

[0114] With this work machine 1, the inner wall 50 can be supported by the support mechanism 62, thereby preventing the inner wall 50 from falling onto the outer wall 40.

[0115] (Item A5) The work machine 1 according to any one of items A1 to A4, wherein the biasing member 60 is a coil spring 60, and a rod 51 inserted into the coil spring 60 is attached to one of the inner wall 50 and the outer wall 40.

[0116] With this work machine 1, the coil spring 60 can be extended and retracted along the rod 51, making it possible to prevent the coil spring 60 from bending.

[0117] (Item A6) The work machine 1 described in Item A5, wherein a cylindrical body 41 protruding toward the one side is attached to the other of the inner wall 50 and the outer wall 40, the rod 51 is movable along the inner surface of the cylindrical body 41, and the coil spring 60 expands and contracts in accordance with the movement of the rod 51.

[0118] With this work machine 1, the coil spring 60 expands and contracts in accordance with the movement of the rod 51, making it possible to set the direction of expansion and contraction of the coil spring 60 to a constant direction.

[0119] (Item A7) The work machine 1 according to Item A6, further comprising a stroke restricting member (pin 42) that restricts the range of movement of the rod 51 relative to the cylindrical body 41 and prevents the rod 51 from coming out of the cylindrical body 41.

[0120] This work machine 1 prevents the rod 51 from coming out of the cylindrical body 41, thereby preventing the inner wall 50 from falling off the outer wall 40.

[0121] (Item A8) A work machine 1 according to any one of items A1 to A7, comprising a prime mover 20 mounted on the machine body 2, wherein the bonnet 26a covers the side of the prime mover chamber 21 in which the prime mover 20 is located, the inner wall 50 is located on the side of the prime mover 20, and the outer wall 40 is located on the opposite side from the side of the prime mover 20 to form the side of the machine body 2.

[0122] This work device 1 reduces the force required to close the bonnet 26a that covers the side of the engine compartment 21.

[0123] (Item A9) The work machine 1 according to Item A4, wherein the support mechanism 62 comprises support cylinders 63, 41 attached to one of the inner wall 50 and the outer wall 40 and extending toward the other side of the inner wall 50 and the outer wall 40, and insertion members 64, 51 attached to the other side of the inner wall 50 and the outer wall 40 and inserted into the support cylinders 63, 41, and the insertion members 64, 51 move along the inner surface of the support cylinders 63, 41 to restrict the direction of approach to and away from the outer wall 40.

[0124] With this work machine 1, the insertion members 64 and 51 move along the inner surfaces of the support cylinders 63 and 41, making it possible to set the direction of the inner wall 50's approach to and separation from the outer wall 40 to a constant direction.

[0125] (Item B1) A work machine 1 comprising a work device 4 attached to the machine body 2 and cameras 70, 80 capable of photographing the lower outside of the machine body 2, wherein the cameras 70, 80 are positioned in a first position in which, in a top view, at least the light-receiving portions 70a, 80a that take in light from the outside protrude outward from the outer edge of the machine body 2.

[0126] With this work machine 1, the light-receiving parts 70a and 80a of the cameras 70 and 80, which take in at least external light when viewed from above, are positioned to protrude outward from the outer edge of the machine body 2. As a result, the machine body 2 is less likely to be reflected in the images captured by the cameras 70 and 80, and the surrounding situation of the machine body 2 can be sufficiently grasped from the images captured by the cameras 70 and 80.

[0127] (Item B2) The work machine 1 according to Item B1, wherein the cameras 70 and 80 are movable between the first position and the second position in which the light-receiving portions 70a and 80a do not protrude from the outer edge of the machine body 2 when viewed from above.

[0128] With this work machine 1, by moving the cameras 70 and 80 to a second position, it is possible to prevent objects from colliding with the cameras 70 and 80 when the work machine 1 is being moved or in operation. Furthermore, when storing the work machine 1, moving the cameras 70 and 80 to the second position allows the work machine 1 to be made more compact.

[0129] (Item B3) The work machine 1 according to item B1 or B2, comprising a traveling device 3 that supports the machine body 2 so as to be able to move, wherein when the camera 70 is in the first position, at least a part of the traveling device 3 is included in the shooting range.

[0130] With this work machine 1, when the cameras 70 and 80 are in the first position, it is possible to photograph at least a part of the traveling device 3. Therefore, by looking at the positional relationship between the photographed object and the traveling device 3, it becomes easy to determine the position of the object and the position of the work machine 1.

[0131] (Item B4) The work machine 1 according to Item B3, wherein the traveling device 3 is a crawler-type traveling device, and when the cameras 70 and 80 are in the first position, their shooting range includes at least a portion of the tracks of the crawler-type traveling device.

[0132] With this work machine 1, by observing the positional relationship between the object captured by cameras 70 and 80 and the tracks of the crawler-type running gear, it becomes easy to understand the relationship between the position of the object and the position of the work machine 1 in the width direction. Therefore, it becomes possible to easily move the machine body 2 sideways using the crawler-type running gear.

[0133] (Item B5) The machine 2 includes a side bonnet (first bonnet 26) that constitutes the side of the machine 2, and the camera 70, when in the first position, has at least a light-receiving portion 70a that protrudes outward from the outer edge of the side bonnet when viewed from above, as described in any of Items B1 to B4.

[0134] With this work machine 1, when the camera 70 is in the first position, it is possible to reduce or eliminate the reflection of the side bonnet (first bonnet 26) in the captured image. As a result, blind spots are less likely to occur in the shooting range of the camera 70, and it becomes easier for the operator to grasp the position of the side of the work machine 1 when looking at the captured image.

[0135] (Item B6) The machine 2 includes a weight 12 that constitutes the rear of the machine 2, and the camera 80, when in the first position, protrudes outward from the outer edge of the weight 12 in a top view, as described in any of Items B1 to B5.

[0136] This work device 1 makes it possible to reduce or eliminate the appearance of the weight 12 in the captured image when the camera 80 is in the first position. As a result, blind spots are less likely to occur in the shooting range of the camera 80, and it becomes easier for the operator to grasp the position of the rear of the work device 1 when looking at the captured image.

[0137] (Item B7) The work machine 1 according to Item B2, wherein the cameras 70 and 80 are movable between the first position and the second position by rotating around an axis that extends in the vertical direction.

[0138] This work machine 1 makes it possible to reduce the space required when cameras 70 and 80 move between the first position and the second position.

[0139] (Item B8) The work machine 1 according to Item B7, wherein the second position includes one position which is a position rotated in one direction from the first position, and the other position which is a position rotated in the opposite direction from the first position.

[0140] With this work machine 1, the cameras 70 and 80 can be rotated in two directions from the first position, thereby increasing the degree of freedom of rotation of the camera 70.

[0141] (Item B9) The work machine 1 according to Item B2 or B7, wherein the cameras 70 and 80 are in the first position and are movable to the second position when they come into contact with an object and receive an external force.

[0142] This work machine 1 makes it possible to reduce the damage to the camera 70 when it is subjected to an external force by an object, thereby preventing damage to the camera 70.

[0143] (Item B10) The work machine 1 according to item B2 or B7, wherein the machine body 2 is rotatable around an axis extending in the vertical direction, and the cameras 70 and 80, when in the first position, are moved to the second position when they strike an object and receive an external force due to the rotation of the machine body 2.

[0144] With this work machine 1, damage to the camera 70 can be prevented if the camera 70 is subjected to an external force when the machine body 2 is rotated and hits an object.

[0145] (Item B11) The work machine 1 according to any one of items B2, B7, or B9, comprising a bracket 72 to which the cameras 70 and 80 are attached, and a support body 73 that supports the bracket 72 on the machine body 2, wherein the support body 73 has a rotation support mechanism 85 that supports the bracket 72 so that it can rotate around an axis in the vertical direction, and a holding mechanism 86 that can hold the bracket 72 in a state in which the cameras 70 and 80 are in the first position and in the second position.

[0146] With this work machine 1, the rotating support mechanism 85 allows the cameras 70 and 80 to be rotated around their vertical axes, and the holding mechanism 86 allows the cameras 70 and 80 to be held in the first and second positions. Therefore, it is possible to reliably move the cameras 70 and 80, and it is possible to prevent the cameras 70 and 80 from moving between the first and second positions when there is no need to move them.

[0147] A preferred embodiment of the present invention is that the work machine described in items A1 to A9 may have the configuration of the work machine described in any of items B1 to B11.

[0148] While embodiments of the present invention have been described above, the embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of the present invention is indicated by the claims rather than the foregoing description, and all modifications within the meaning and scope of equivalents of the claims are intended to be included.

[0149] 1. Work machine 2. Machine body 3. Traveling device 4. Work device 12. Weight 26. Side bonnet (first bonnet) 40. Outer wall 50. Inner wall 60. Biasing member (coil spring) 61. Trim (sealing member) 70. Camera 70a. Light receiving part 72. Bracket 73. Support 80. Camera 80a. Light receiving part 85. Rotation support mechanism 86. Holding mechanism

Claims

1. A work device comprising: a machine body; a work device attached to the machine body; and a camera capable of photographing the lower outside of the machine body, wherein the camera is positioned at a first position such that, in a top view, at least the light-receiving portion that takes in light from the outside protrudes outward from the outer edge of the machine body.

2. The work machine according to claim 1, wherein the camera is movable between a first position and a second position in which, when viewed from above, the light-receiving portion does not protrude outward from the outer edge of the machine body.

3. The work machine according to claim 1 or 2, comprising a traveling device that supports the machine so as to be able to move, wherein when the camera is in the first position, at least a part of the traveling device is included in the shooting range.

4. The work machine according to claim 3, wherein the traveling device is a crawler-type traveling device, and when the camera is in the first position, the shooting range includes at least a portion of the tracks of the crawler-type traveling device.

5. The work machine according to claim 1 or 2, wherein the machine body includes a side bonnet that constitutes the side of the machine body, and when the camera is in the first position, at least the light-receiving portion protrudes outward from the outer edge of the side bonnet when viewed from above.

6. The work machine according to claim 1 or 2, wherein the machine body includes a weight that constitutes the rear part of the machine body, and the camera, when in the first position, protrudes outward from the outer edge of the weight in a top view.

7. The work machine according to claim 2, wherein the camera is movable between the first position and the second position by rotating around an axis extending in the vertical direction.

8. The work machine according to claim 7, wherein the second position includes one position which is a position rotated in one direction from the first position, and the other position which is a position rotated in the opposite direction from the first position.

9. The work machine according to claim 2, wherein the camera is movable to the second position when it strikes an object and receives an external force while in the first position.

10. The work machine according to claim 2, wherein the machine body is rotatable about an axis extending in the vertical direction, and the camera is movable to the second position when it strikes an object and receives an external force due to the rotation of the machine body while in the first position.

11. The work machine according to claim 2, comprising: a bracket to which the camera is attached; and a support body for supporting the bracket on the machine body, wherein the support body has a rotation support mechanism for supporting the bracket so as to be rotatable about an axis in the vertical direction; and a holding mechanism capable of holding the bracket in a state in which the camera is in a first position and in a second position.

12. The work machine according to any one of claims 1 to 11, comprising a sealing member disposed between the machine body and the side bonnet, wherein the side bonnet has an outer wall and an inner wall provided inside the outer wall, the sealing member is disposed to be sandwiched between the inner wall and the machine body when the side bonnet is closed, the inner wall is configured to move toward and away from the outer wall, and a biasing member is interposed between the outer wall and the inner wall to apply a force to the inner wall in a direction away from the outer wall.

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