Working machine

Abstract

To provide a working machine capable of preventing deterioration of sealing performance caused by opening / closing of an exterior cover.SOLUTION: According to an aspect of the present disclosure, there is provided an image forming apparatus including a machine body including a frame configured to support a device, and an exterior body configured to cover the device, wherein the exterior body includes a first exterior cover configured to be opened and closed about a first axis extending in a predetermined direction, an exterior member adjacent to the first exterior cover in a closed state, and a first seal member configured to seal between the first exterior cover in the closed state and the exterior member, the first seal member includes a fixed piece portion that is fixed to one of the first exterior cover and the exterior member, and a curved piece portion that is continuous with one end of the fixed piece portion, extends from the one end of the fixed piece portion, is elastically deformable, is curved so as to protrude toward the other of the first exterior cover and the exterior member in a closed state, and is formed so as to be capable of coming into contact with the other of the first exterior cover and the exterior member.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present invention relates to a work machine equipped with an exterior cover that can be opened and closed. [Background technology]

[0002] Conventionally, working machines such as backhoes have been equipped with a bonnet as an exterior cover that encloses and protects equipment such as a motor. The bonnet can be opened and closed around a shaft, and a seal member is disposed between the bonnet in the closed state and the surrounding exterior member.

[0003] For example, Patent Document 1 discloses a configuration in which a seal member having a tubular seal portion is attached to a bonnet, and when the bonnet is closed, the seal portion is pressed against a fixed member on the aircraft body side to form a seal. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-4489 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the seal member having the above-described structure, when the bonnet is opened or closed, depending on the direction in which the bonnet is opened or closed, distortion or pulling action may occur in the seal portion, which may result in damage to the seal member.

[0006] Therefore, the present invention provides a work machine that can prevent a decrease in sealing performance caused by opening and closing an exterior cover. [Means for solving the problem]

[0007] The present invention comprises a body including a frame that supports equipment, and an exterior body that covers the equipment, wherein the exterior body includes a first exterior cover that can be opened and closed around a first axis that extends in a predetermined direction as a rotation center, an exterior member that is adjacent to the first exterior cover in a closed state, and a first sealing member that seals between the first exterior cover and the exterior member in the closed state, and the first sealing member has a fixed piece portion that is fixed to either the first exterior cover or the exterior member, and a curved piece portion that is elastically deformable and has one end that is continuous with one end of the fixed piece portion and the other end that is a free end, and the curved piece portion is curved between the one end and the other end in a convex shape toward the other side of either the first exterior cover or the exterior member in the closed state, and is formed so as to be able to contact the other. [Effects of the Invention]

[0008] According to the present invention, it is possible to prevent a decrease in sealing performance caused by opening and closing the exterior cover. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of a work machine according to one embodiment of the present invention, viewed obliquely from above. [Figure 2] FIG. 2 is a perspective view of the working machine of the embodiment in a partially disassembled state, as viewed obliquely from above. [Figure 3] FIG. 3 is a perspective view of the working machine of the embodiment as seen obliquely from the rear, with the rear exterior cover (bonnet) open. [Figure 4] FIG. 4 is a perspective view of the working machine of the embodiment as seen obliquely from behind, with the first exterior cover (bonnet) open. [Figure 5] FIG. 5 is a perspective view of the working machine of the embodiment as seen obliquely from behind, with the second exterior cover (bonnet) open. [Figure 6] FIG. 6 is a schematic plan view of the base plate of the work machine of the embodiment, and is a schematic plan view for explaining the arrangement of devices. [Figure 7]FIG. 7 is a schematic cross-sectional view illustrating a mounting manner of a seal member (tube-type seal member) of a first exterior part of an exterior body of the work machine of the embodiment. [Figure 8] FIG. 8 is a schematic cross-sectional view for explaining another embodiment of the tube-type sealing member. [Figure 9] Figure 9 is a schematic cross-sectional view for explaining the installation mode of the sealing member (tube-type sealing member) of the second exterior part of the exterior body of the work machine in the same embodiment, and is a schematic cross-sectional view showing the installation mode of the sealing member that seals between the first exterior cover and the second exterior cover. [Figure 10] Figure 10 is a schematic, partially enlarged cross-sectional view for explaining the mounting mode of the sealing members (first sealing member and second sealing member) of the second exterior part of the exterior body of the work machine in the same embodiment, and is a schematic, partially enlarged cross-sectional view showing the mounting mode of the sealing members (first sealing member and second sealing member) that seal between the first exterior cover and the second exterior cover. [Figure 11] Figure 11 is a schematic partially enlarged cross-sectional view for explaining the installation mode of the sealing member (tube-type sealing member) of the second exterior part of the exterior body of the work machine in the same embodiment, and is a schematic partially enlarged cross-sectional view showing the installation mode of the sealing member that seals between the exterior fixing cover and the second exterior cover. [Figure 12] FIG. 12 is a partial cross-sectional view of a second exterior part of the exterior body of the working machine of the same embodiment, showing the second exterior cover in a closed state. [Figure 13] FIG. 13 is a partial cross-sectional view of a second exterior part of the exterior body of the working machine of the same embodiment, with the second exterior cover in an open state. [Figure 14] FIG. 14 is a schematic partially enlarged cross-sectional view illustrating the manner in which the seal member (first seal member) of the second exterior part of the exterior body of the work machine of the embodiment is attached. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, a working machine according to one embodiment of the present invention will be described with reference to the drawings.

[0011] 1 to 5, the work machine 1 comprises a body 2 including a frame 21 that supports devices 60, 61, 62, 63, 64, and 65, a traveling device 3 that supports the body 2 so that it can travel, an exterior body 4 that covers the devices 60, 61, 62, 63, 64, and 65, and a work device 5 that performs a predetermined task. In the following description, the direction in which the traveling device 3 moves straight (the direction in which it moves forward and backward) will be referred to as the fore-and-aft direction, and the direction perpendicular to the fore-and-aft direction will be referred to as the lateral direction.

[0012] The work machine 1 according to this embodiment is a backhoe, and includes a shovel unit 5a (excavation unit) and a dozer unit 5b as work devices 5. The work machine 1 includes a pair of traveling units 3, 3 arranged on both lateral sides of the machine body 2. In this embodiment, a crawler type traveling unit is employed for each of the pair of traveling units 3, 3.

[0013] The machine body 2 includes a traveling base 20 connected to a pair of left and right traveling devices 3, 3, and a swivel base 21 (see FIG. 2) that is arranged above the traveling base 20 via a swivel bearing B and is swivelable on the traveling base 20 around an axis CL that extends in the vertical direction as the center of rotation, the swivel base 21 serving as a frame 21 that supports the equipment 60, 61, 62, 63, 64, 65. The machine body 2 further includes a driver's seat protection device 22 that defines a driver's cab DR (riding space) and is arranged on the swivel base 21.

[0014] As shown in FIG. 6, the swivel base 21 includes a base plate 210 and an equipment connector 211 to which the working implement 5 (shovel implement 5a) is connected, the equipment connector 211 being connected to the front end of the base plate 210 in the fore-and-aft direction.

[0015] A swivel bearing B connected to the traveling base 20 is fixed (connected) to the base plate 210. A driver's seat 22a and a cabin (driver's seat protection device) 22 are arranged in a main area A1 set in the left front part of the base plate 210, equipment such as a prime mover 60, a radiator 61, an oil cooler 62, and a hydraulic pump 65 are arranged in a rear area A2a set on the rear side of the main area A1 in the longitudinal direction, and a hydraulic oil tank 63 and a fuel tank 64 are arranged in a side area A2b set on one lateral side (right side) of the main area A1 and the rear area A2a. Note that the types of equipment arranged in the rear area A2a and the side area A2b and the arrangement positions of each equipment in the rear area A2a and the side area A2b are not limited to these.

[0016] The exterior body 4 covers the devices 60, 61, 62, 63, 64, and 65 on the swivel base 21 (base plate 210) which is a frame from above and laterally, and defines a machine room MR in which the devices 60, 61, 62, 63, 64, and 65 are housed.

[0017] More specifically, in the work machine 1 of this embodiment, the machine room MR includes a first machine room MRa corresponding to a rear area A2a located on the rear side of the driver's seat protection device 22 (driver's cab DR) in the fore-and-aft direction, and a second machine room MRb corresponding to a side area A2b located on one side in the lateral direction of the driver's seat protection device 22 (driver's cab DR). Accordingly, the exterior body 4 of this embodiment includes a first exterior part 40 that defines the first machine room MRa and a second exterior part 41 that defines the second machine room MRb.

[0018] As shown in FIG. 3, the first exterior portion 40 includes a first rear exterior member 401 disposed along the rear wall portion 221 of the driver's seat protection device 22 and having a first portion 401a defining an upper portion of the first machine room MRa and a second portion 401b defining a left side portion of the first machine room MRa; an exterior member (counterweight) 402 defining a lower rear portion of the first machine room MRa; and a rear exterior cover 400 connected to the first rear exterior member 401 so as to be openable and closable about a horizontal axis S1 extending laterally relative to the first rear exterior member 401. The exterior member (counterweight) 402 is disposed across the entire horizontal length of the rear end of the base plate 210, straddling the rear region A2a and the side region A2b. The right end of the first machine room MRa is connected to the second machine room MRb. Note that the first machine room MRa and the second machine room MRb may be separated from each other.

[0019] 3 to 5, rear exterior cover 400 is a so-called bonnet and includes a top portion 400a extending in the front-to-rear direction and a hanging wall portion 400b hanging down from the rear end of top portion 400a. The other lateral end of hanging wall portion 400b is curved forward.

[0020] Accordingly, the rear exterior cover 400 has a front end portion of a top portion 400a, which is the upper end portion of the rear exterior cover 400, connected to a first portion 401a of the first rear exterior member 401 via a hinge 405 having a horizontal axis S1 (support shaft) extending laterally. The second rear exterior member 402 is disposed along the rear end of the base plate 210 in the front-to-rear direction. In the closed state, the lower end portion of the rear exterior cover 400 is disposed so as to overlap the upper end portion of the second rear exterior member 402, and the left end portion is disposed so as to overlap the second portion 401b of the first rear exterior member 401.

[0021] When the rear exterior cover 400 is in a closed state, the outer peripheral edge of the rear exterior cover 400 faces the surrounding exterior members 401, 402 and the abutment member 42 (see Figure 3) provided on the fuselage 2 in the fore-and-aft direction via a sealing member 43 described later.

[0022] In this embodiment, as shown in FIG. 7, the first exterior part 40 has a sealing member (hereinafter referred to as a tubular sealing member) 43 including a tubular (cylindrical) sealing portion 430, and has the tubular sealing member 43 that sandwiches and seals the sealing portion 430 between the rear exterior cover 400 in a closed state and the surrounding exterior parts 401, 402.

[0023] The tube-type sealing member 43 includes a tube (cylindrical) sealing portion 430, an attachment portion 431 for attachment to an object, and a connection portion 432 for connecting the attachment portion 431 and the sealing portion 430, all of which are integrally molded from an elastic material.

[0024] In the tubular seal member 43, the seal portion 430 is configured to be elastically deformable in the radial direction, and this radial elastic deformation (restoring force) allows it to come into close contact with the opposing surface of the other component. The connecting portion 432 is formed as a strip extending radially from the outer periphery of the seal portion 430 and is arranged along the longitudinal direction of the seal portion 430. The mounting portion 431 has a pair of clamping pieces 431a, 431a that sandwich the band-shaped seal mounting piece 403 that is protruding from the component to be mounted, and a connecting portion 431b that connects one end of the pair of clamping pieces 431a, 431a. The connecting portion 432 is connected to the center of the connecting portion 431b, and the seal portion 430, connecting portion 432, and mounting portion 431 are arranged in a row. Note that the connecting position of the connecting portion 432 is not limited to the connecting portion 431b, and it may be, for example, one of the clamping pieces 431a, as shown in FIG. 8.

[0025] 3, the tubular sealing member 43 is attached to one lateral end of the rear exterior cover 400, the lower end of the rear exterior cover 400, and the second portion 401b of the first rear exterior member 401. Accordingly, as shown in FIG. 7, seal attachment pieces 403 for attaching the tubular sealing member 43 are provided so as to protrude forward on the inner surfaces of one lateral end and the lower end of the rear exterior cover 400, and are provided so as to protrude rearward on the rear portion (rear end surface) of the second portion 401b of the first rear exterior member 401.

[0026] As shown in Figures 4 and 5, the exterior body 4 (second exterior part 41) of this embodiment includes at least two exterior members 410, 411, 412, 413 arranged adjacent to each other, and sealing members 43, 45 that seal (close) the opposing parts of the adjacent exterior members 410, 411, 412, 413.

[0027] The exterior member 410 is an exterior cover (hereinafter referred to as the first exterior cover) that can be opened and closed around a first axis S2 extending in a predetermined direction (substantially the up-down direction) as a rotation center, and covers the devices 63, 64 arranged in the side region A2b of the base plate 210 from the side (one (right) side in the lateral direction) (see FIG. 4). The exterior member 411 is an exterior cover (hereinafter referred to as the second exterior cover) that can be opened and closed around a second axis S3 extending in a direction (substantially the front-rear direction) intersecting the first axis S2 as a rotation center, and covers the devices 63, 64 arranged in the side region A2b from above (see FIG. 5). The exterior fixed cover 412 is attached to the machine body 2 in an unopenable manner, and together with the exterior member 410, covers the devices 63, 64 arranged in the side region A2b from the side. The first exterior cover 410 is adjacent to the second exterior cover 411 arranged above it and the exterior fixed cover 412 arranged in front of it. The second exterior cover 411 is disposed so as to straddle both the first exterior cover 410 and the exterior fixed cover 412 .

[0028] In addition, the second exterior part 41 includes a first sealing member 45 that seals between the first exterior cover 410 in the closed state and the exterior member 411 in the closed state, a sealing member 43 that seals between the first exterior cover 410 in the closed state and the exterior fixed cover 412, and a sealing member 43 that seals between the exterior member 411 in the closed state and the exterior fixed cover 412.

[0029] The lower part of the rear end side of the first exterior cover 410 is formed into a shape corresponding to the front end part of the second rear exterior member 402, and when the first exterior cover 410 is in the closed state, it overlaps with the upper end part and one lateral end part of the second rear exterior member 402 (counterweight) in a direction perpendicular to the vertical direction.

[0030] The exterior fixed cover 412 is supported (fixed) at a fixed position by a support frame (not shown) fixed to the base plate 210. In contrast, the first exterior cover 410 is supported so as to be rotatable about a first axis S2. In this embodiment, the front end of the first exterior cover 410 in the front-to-rear direction is connected to a support frame (not shown) that supports the rear end of the exterior fixed cover 412 in the front-to-rear direction via a hinge 420 including the first axis S2 extending in the up-down direction (a predetermined direction). As a result, the first exterior cover 410 opens and closes in a sideways manner, with the front end side in the front-to-rear direction set as the rotation center. In this embodiment, the first exterior cover 410 can be opened and closed while the second exterior cover 411 is kept closed.

[0031] When the first exterior cover 410 is in the closed state, the upper side of the rear end portion in the fore-and-aft direction of the first exterior cover 410 is inside the hanging wall portion 400b of the rear exterior cover 400, and the lower side of the rear end portion in the fore-and-aft direction of the first exterior cover 410 is formed to overlap with the upper end portion of the second rear exterior member 402 (counterweight).

[0032] In this embodiment, the first exterior cover 410 and the exterior fixing cover 412 are formed in a curved shape that bulges (protrudes) on one side in the lateral direction, and their outer surfaces are continuous to form the side surfaces of the second exterior part 41.

[0033] 4 and 9, a tube-type sealing member 43 is attached to the rear end side in the front-rear direction of the first exterior cover 410. As the tube-type sealing member 43, the same one as that used for the first exterior part 40 can be used.

[0034] When the first exterior cover 410 is in the closed state, the upper part in the vertical direction of the tube-type sealing member 43 attached to the first exterior cover 410 is pressed against the abutment surface extending in the vertical direction of the abutment member 42 supported by the base plate 210, thereby sealing the gap between the first exterior cover 410 and the abutment member 42, and the lower part in the vertical direction of the tube-type sealing member 43 is pressed against the upper end of the second rear exterior member 402, thereby sealing the gap between the first exterior cover 410 and the second rear exterior member 402.

[0035] 10, the upper portion of the first exterior cover 410 is bent inward, and the upper end of the first exterior cover extending in the front-to-rear direction forms a protruding piece (hereinafter referred to as a mounting piece) 410a that protrudes toward the inside of 410 (toward the machine room MR). A second seal member 46 made of an elastic material and having a U-shaped cross section is attached to the mounting piece 410a so as to enclose the mounting piece 410a. When the first exterior cover 410 and the second exterior cover 411 are closed, the second seal member 46 abuts against the first seal member 45 provided on the second exterior cover 411, and together with the first seal member 45, seals the gap between the first exterior cover 410 and the second exterior cover 411.

[0036] The upper end of the exterior fixing cover 412 is aligned in the front-to-rear direction and is generally continuous with the upper end of the first exterior cover 410 in the closed state. In this embodiment, as shown in Fig. 11, a seal mounting piece 412a is also provided at the upper end of the exterior fixing cover 412, and a tubular seal member 43 is also attached to this seal mounting piece 412a.

[0037] In this embodiment, as shown in Fig. 4, the exterior body 4 (second exterior portion 41) includes, as an exterior member, a side exterior member 413 that is arranged along a wall portion 222 on one (right) side in the lateral direction of the driver's seat protection device 22 and extends from the wall portion 222 on that side to one side in the lateral direction. The side exterior member 413 is fixed to one wall portion 222 and extends in the front-rear direction. The side exterior member 413 is curved in the front-rear direction so that the center portion in the front-rear direction is at the highest position.

[0038] The second exterior cover 411 is curved in the front-rear and lateral directions, and has a peak (top) at the center in each of the front-rear and lateral directions. As shown, the first exterior cover 410 and the second exterior cover 411 are provided so as to be openable and closable about a second axis S3 extending in a direction perpendicular to the first axis S2 as a rotation center. In this embodiment, the second axis S3 extends in the front-rear direction. That is, the second axis S3 extends in the front-rear direction perpendicular to the up-down direction in which the first axis S2 extends and the lateral direction in which the first exterior cover 410 and the second exterior cover 411 move relative to each other. In this embodiment, the second exterior cover 411 closes an area surrounded by a side exterior member 413 to which a wall portion 222 on one lateral side of the driver's seat protection device 22 is fixed, the first exterior cover 410, and the exterior fixed cover 412.

[0039] The other lateral end of the second exterior cover 411 is connected to the side exterior member 413 or the aircraft frame via a hinge 421 including a second axis S3. This allows the second exterior cover 411 to be opened and closed in the vertical direction around the other lateral end. In this embodiment, the second exterior cover 411 can be opened and closed while the first exterior cover 410 is in the closed state. The hinge 421 including the second axis S3 is configured so that the other lateral end of the second exterior cover 411 moves in contact with and away from the upper surface of the side exterior member 413 in the vertical direction when the second exterior cover 411 is rotated (opened) around the second axis S3. A tube-type seal member 43 is attached to the lateral tip of the side exterior member 413, and when the second exterior cover 411 is in the closed state, a seal portion 430 of the tube-type seal member 43 is in tight contact (pressure contact) with the inner surface of the other lateral end of the second exterior cover 411.

[0040] The first exterior cover 410 and the second exterior cover 411 are arranged to overlap in a planar view when they are in a mutually closed state. In this embodiment, one lateral side portion (edge) of the outer contour (outer edge) of the second exterior cover 411 in a planar view is formed to fit along the upper end of the first exterior cover 410 and the upper end of the fixing cover.

[0041] A downward-facing first seal surface 416a is formed in the range of the second exterior cover 411 corresponding to the upper end of the exterior fixed cover 412, and is a flat first seal surface 416a with which the seal portion 430 of the tubular seal member 43 attached to the exterior fixed cover 412 can come into close contact. That is, a flat abutting seal surface that abuts from above against the seal portion 430 of the tubular seal member 43 is formed in the range of the second exterior cover 411 corresponding to the upper end of the exterior fixed cover 412 and in a predetermined range inside one lateral side portion (edge) of the outer contour (outer edge) of the second exterior cover 411 in a plan view. In this embodiment, the outer periphery of the second exterior cover 411 is folded inward, and the outer surface of this folded portion that faces downward forms the flat portion (seal surface) 416a.

[0042] 12 and 13, a planar second seal surface 416b with which the seal portion 430 of the tubular seal member 43 attached to the side exterior member 413 can come into close contact is also formed in an area of ​​the second exterior cover 411 corresponding to the side exterior member 413. That is, in an area of ​​the second exterior cover 411 corresponding to the upper end of the side exterior member 413, and in a predetermined area inside one lateral side portion (edge) of the outer contour (outer edge) of the second exterior cover 411 in a plan view, the planar second seal surface 416b that abuts from above against the seal portion 430 of the tubular seal member 43 attached to the side exterior member 413 is formed. In this embodiment, the outer periphery of the second exterior cover 411 is folded inward, and the outer surface of this folded portion that faces downward constitutes the second seal surface 416b.

[0043] A seal mounting surface 415, which faces downward and is used to mount the first seal member 45, is formed in a range of the second exterior cover 411 corresponding to the upper end of the first exterior cover 410. That is, the seal mounting surface 415 for mounting the first seal member 45 is formed in a range of the second exterior cover 411 corresponding to the upper end of the first exterior cover 410, in a predetermined range inside one lateral side portion (edge) of the outer contour (outer edge) of the second exterior cover 411 in a plan view. That is, the first seal member 45 is attached to the underside of the second exterior cover 411 in the closed state. It is fixed to the inside of the outer edge of the second exterior cover 411 in plan view.

[0044] As shown in FIG. 14, the second exterior cover 411, which is an exterior member, includes, as a seal mounting surface 415, a flat first arrangement surface 415a on which a fixing piece portion 450 of the first seal member 45, which will be described later, is placed, and a curved second arrangement surface 415b continuous with the first arrangement surface 415a on which a direction change portion 451a of the first seal member 45, which will be described later, is placed.

[0045] More specifically, the seal mounting surface 415 includes a flat portion 415c that extends from the outer edge of the second outer cover 411 toward the inside of the second outer cover 411, a second positioning surface 415b that is a curved surface that continues from the flat portion 415c and curves downward as it goes inward, and a flat first positioning surface 415a that continues from the second positioning surface 415b.

[0046] The second arrangement surface 415b is formed in accordance with the curved shape of a direction changer 451a (described later) of the first seal member 45. In this embodiment, the second arrangement surface 415b is an arcuate surface, and the radius of curvature R3 of the second arrangement surface 415b is set to be the same as or approximately the same as the radius of curvature R1 of the direction changer 451a. The first arrangement surface 415a expands in a tangential direction to the second arrangement surface 415b (arcuate surface). In this embodiment, the first arrangement surface 415a is inclined with respect to the flat surface portion 415c. That is, the first arrangement surface 415a is inclined downward as it goes inward.

[0047] The flat surface 415c, the first arrangement surface 415a, and the second arrangement surface 415b are each formed inside and along the outer periphery (outer shell) of the second exterior cover 411. In other words, the seal attachment surface 415 is formed to extend in the outer periphery direction of the second exterior cover 411. The flat surface 415c faces the upper end (attachment piece 410a) of the first exterior cover 410 in the closed state with a gap in the vertical direction.

[0048] The first seal member 45 has a fixed piece 450 fixed to the second exterior cover 411, which is an exterior member, and an elastically deformable curved piece 451 that is continuous with one end of the fixed piece 450 and extends from that end, the curved piece 451 being curved to form a convex shape toward the first exterior cover 410 in the closed state and formed so as to be able to come into contact with the first exterior cover 410. Note that in this embodiment, the first seal member 45 is fixed to the second exterior cover 411 side so as to be able to come into contact with the first exterior cover 410, but this is not limiting, and the first seal member 45 may also be fixed to the first exterior cover 410 side so as to be able to come into contact with the second exterior cover 411.

[0049] In this embodiment, the first sealing member 45 has a fixed piece portion 450 that is arranged on a first placement surface 415a of the second exterior cover 411, which is an exterior member, and is fixed to the first placement surface 415a of the second exterior cover 411, and an elastically deformable curved piece portion 451 that is continuous with one end of the fixed piece portion 450 and extends from one end of the fixed piece portion 450, and is arranged on the second placement surface 415b of the second exterior cover 411, curves convexly toward the first exterior cover 410 in the closed state, and is formed so as to be able to come into contact with the first exterior cover 410.

[0050] The first seal member 45 has elasticity, and the tip of the curved piece portion 451 is a free end, so even if the curved piece portion 451 is twisted or the like, it has a high degree of freedom of deformation, and the force due to the twisting or the like does not act in a concentrated manner, preventing damage. In this embodiment, the fixed piece portion 450 and the curved piece portion 451 are continuously and integrally molded from an elastic resin material. The material of the first seal member 45 is not particularly limited as long as it is an elastic member having a sealing function, but in this embodiment it is made of elastomer. The first seal member 45 of this embodiment is also elastically deformable in the fixed piece portion 450. When the fixed piece portion 450 is also configured to be elastically deformable in this way, Even if a force acts on the portion fixed to the exterior cover 411, the force is absorbed (dissipated) by the elastic deformation of the fixing piece portion 450, and damage to the fixing piece portion 450 is prevented.

[0051] In this embodiment, the fixed piece portion 450 and the curved piece portion 451 are set to the same or approximately the same thickness. When the fixed piece portion 450 and the curved piece portion 451 are set to the same or approximately the same thickness, there are no points (locations) where the thickness changes suddenly, and the load (stress) is prevented from concentrating at one point.

[0052] The fixing piece 450 is formed in a strip shape that extends in one direction and has a thickness in a direction perpendicular to the one direction. The fixing piece 450 is positioned with its longitudinal direction intersecting a first direction (the horizontal direction in this embodiment) in which the first exterior cover 410 and the exterior member move relative to each other when the first exterior cover 410 is opened or closed.

[0053] The fixing piece portion 450 extends in a tangential direction relative to the direction change portion 451a, which will be described later. In this embodiment, the fixing piece portion 450 is fixed to the exterior member via rivets R. That is, the fixing piece portion 450 is fixed (fastened) to the second exterior cover 411 (first arrangement surface 415a) by a plurality of rivets R that are arranged at predetermined intervals in the outer circumferential direction of the second exterior cover 411. Since the fixing piece portion 450 extends in a tangential direction relative to the direction change portion 451a, the connection portion between the fixing piece portion 450 and the direction change portion 451a becomes continuous, and therefore, repeated stress and the like are prevented from being concentrated on the connection portion 432.

[0054] The curved piece 451 extends from one end in a short direction perpendicular to the longitudinal direction and thickness direction of the fixed piece 450. The curved piece 451 is curved about a curvature center that is an axis extending in a third direction (front-rear direction in this embodiment) perpendicular or substantially perpendicular to a first direction (horizontal direction in this embodiment) and a second direction (vertical direction in this embodiment) in which the first exterior cover 410 and the exterior member 411 are adjacent to each other in the closed state.

[0055] The curved piece portion 451 includes a direction change portion 451a extending from one end of the fixed piece portion 450, the direction change portion 451a being curved around a first axis L1 as a center of curvature and extending in a third direction (front-to-back direction in this embodiment) that is perpendicular or substantially perpendicular to the first direction (horizontal direction in this embodiment) and the second direction (up-down direction in this embodiment) in which the first exterior cover 410 and the exterior member 411 are adjacent to each other, and a contact portion 451b extending from the tip of the direction change portion 451a, the contact portion 451b being curved around a second axis L2 that extends in the third direction (front-to-back direction in this embodiment) as a center of curvature and formed so as to be able to come into contact with either the first exterior cover 410 or the exterior member.

[0056] The direction change portion 451a and the contact portion 451b have curved shapes that are continuous with each other. That is, the direction change portion 451a is set to a predetermined radius of curvature R1 with the first axis L1 as the center of curvature, and the contact portion 451b is set to a predetermined radius of curvature R2 with the second axis L2 as the center of curvature. In this embodiment, the first axis L1 and the second axis L2 coincide or approximately coincide, and the direction change portion 451a and the contact portion 451b are curved with the same radii of curvature R1, R2 and are arranged on concentric circles. That is, in this embodiment, the curved piece portion 451 is curved into a perfect arc shape. The curved piece portion 451 has a perfect arc shape in a normal state and deforms from the perfect arc shape upon contact with the mating side. Note that, because FIGS. 10 and 14 are cross-sections viewed from the front side in the front-to-rear direction, the first axis L1 and the second axis L2 that coincide with each other are illustrated as a single point (point).

[0057] As shown in FIG. 10, the curved piece portion 451 (contact portion 451b) is arranged so that the mating part (in this embodiment, the mounting piece 410a or the second seal member 46 attached to the mounting piece 410a) comes into contact with the entire or partial range of the contact portion 451b. The first seal member 45 is positioned so that when the mounting piece 410a (second seal member 46) of the first exterior cover 410 approaches from the side (horizontal direction) (when the cover is closed), the mounting piece 410a is located within the range of the contact portion 451b of the curved piece portion 451 of the first seal member 45.

[0058] In this embodiment, the attachment piece 410a (second seal member 46) of the first exterior cover 410 is disposed so as to contact (pressure-contact) a portion of the contact portion 451b closer to (upper than) the direction change portion 451a than the apex (apex in a direction perpendicular to the up-down direction) of the contact portion 451b. In this embodiment, because the second seal member 46 is attached to the attachment piece 410a of the first exterior cover 410, when the first exterior cover 410 is closed, the second seal member 46 comes into line contact with the curved piece portion 451 from the first direction.

[0059] In this way, the mounting piece 410a (second seal member 46) of the first exterior cover 410 contacts a portion of the contact portion 451b closer to the direction change portion 451a (upper side) than the top (top in a direction perpendicular to the up-down direction) of the contact portion 451b, so that the top of the curved piece portion 451 (contact portion 451b) is positioned lower than the mounting piece 410a of the first exterior cover 410 in the closed state, and the first seal member 45 is hooked in the up-down direction on the mounting piece 410a of the first exterior cover 410 (second seal member 46 in this embodiment).

[0060] In particular, because the first seal member 45 (curved piece portion 451) is elastically deformable, when it tries to restore its original shape from a deformed state, the curved piece portion 451 (contact portion 451b) presses against the mounting piece 410a of the first exterior cover 410 from diagonally below. As a result, even when the first exterior cover 410 is opened or closed in a manner in which the mounting piece 410a of the first exterior cover 410 abuts against the curved piece portion 451 of the first seal member 45 from the lateral direction (first direction), the curved piece portion 451 of the first seal member 45 is not pushed by the mounting piece 410a and moves away, and sufficient contact (pressure contact) between the curved piece portion 451 and the mounting piece 410a (second seal member 46) is ensured.

[0061] In this way, the first sealing member 45 directly seals between the first exterior cover 410 and the second exterior cover 411, which are adjacent to each other vertically. Therefore, by opening the first exterior cover 410 and the second exterior cover 411, the opening that was closed by the first exterior cover 410 in the closed state (the opening on the side of the second machine chamber MRb) and the opening that was closed by the second exterior cover 411 in the closed state (the opening above the second machine chamber MRb) become continuous (connected vertically without the intervention of the conventional fixing member), and are opened to the outside as a large opening.

[0062] The fixing piece 450 and the contact portion 451b are arranged with a positional deviation in a direction (diagonal up-down direction in this embodiment) perpendicular to the third direction (front-back direction in this embodiment), and the other end of the fixing piece 450 in the short direction is located outward (lower in this embodiment) from the tip of the curved piece 451 at a predetermined distance D in the direction perpendicular to the third direction. As described above, the fixing piece 450 is fixed to the second exterior cover 411 by the rivet R. By positioning the other end of the fixing piece 450 outward from the tip of the curved piece 451 as described above, the rivet R can be arranged on the other end side of the fixing piece 450, and a distance can be secured between the contact portion 451b (tip side of the curved piece 451) and the rivet R. This prevents force from being concentrated near the base of the rivet R when the curved piece 451 is distorted, thereby preventing damage to the fixing piece 450.

[0063] The above embodiment has been described above, and the present invention (preferable embodiments thereof) provides a work machine 1 described in the following items.

[0064] (Item 1) The device includes a body 2 including a frame 21 supporting devices 60, 61, 62, 63, and 64, and an exterior body 4 covering the devices. The exterior body 4 has a first axis S2 extending in a predetermined direction as a rotation center. the first sealing member 45 has a fixed piece portion 450 fixed to either the first exterior cover 410 or the exterior member 411, and an elastically deformable curved piece portion 451 having one end continuous with one end of the fixed piece portion 450 and the other end being a free end, the curved piece portion 451 being curved in a convex manner between the one end and the other end toward the other side of either the first exterior cover 410 or the exterior member 411 in the closed state, and being capable of coming into contact with the other side.

[0065] According to the work machine 1 of item 1, the other end of the curved piece 451 formed so as to be able to come into contact with either the first exterior cover 410 or the exterior member 411 is a free end. Therefore, even if the first exterior cover 410 is opened or closed while in contact with either the first exterior cover 410 or the exterior member 411, and pulling or twisting occurs in the first sealing member 45, the curved piece 451 can elastically deform to release the concentrated force (load), thereby preventing total or partial damage.

[0066] (Item 2) The work machine 1 described in item 1, wherein the exterior body 4 includes, as the exterior member 411, a second exterior cover 411 that can be opened and closed around a second axis S3 extending in a direction intersecting the first axis S2 as the center of rotation.

[0067] According to the work implement 1 of item 2, the second exterior cover 411 can be opened and closed around the second axis S3, facilitating access to the devices 60, 61, 62, 63, and 64 on the frame 21. Furthermore, because the first exterior cover 410 and the second exterior cover 411 open and close in different directions, the first seal member 45 disposed between the first exterior cover 410 and the second exterior cover 411 is subjected to torsion and tension when the first exterior cover 410 or the second exterior cover 411 is opened and closed. However, as described above, the first seal member 45 is prevented from being subjected to a concentration of tension and torsion forces caused by the opening and closing of the first exterior cover 410 at one point, thereby preventing damage to the first seal member 45. In other words, the first seal member 45 is suitable for sealing between the exterior covers 410 and 411, which open and close in different directions.

[0068] (Item 3) The work machine 1 described in item 2, wherein the first exterior cover 410 can be opened and closed while the second exterior cover 411 is kept in a closed state, and the second exterior cover 411 can be opened and closed while the first exterior cover 410 is kept in a closed state.

[0069] According to the work machine 1 of item 3, the first exterior cover and the second exterior cover are configured to be able to move relative to each other in different directions, but as described above, even if the first seal member 45 is pulled or twisted, the curved piece portion 451 elastically deforms and can release the concentrated force (load), thereby preventing total or partial damage to the first seal member 45.

[0070] (Item 4) The work machine 1 described in item 2 or 3, in which, by opening the first exterior cover 410 and the second exterior cover 411, the opening that was closed by the first exterior cover 410 in the closed state and the opening that was closed by the second exterior cover 411 in the closed state are opened to the outside as a continuous common opening.

[0071] According to the work machine 1 of item 4, when the first exterior cover 410 and the second exterior cover 411 are opened, the opening that was closed by the first exterior cover 410 and the opening that was closed by the second exterior cover 411 in the closed state become continuous and open to the outside as a large opening. Specifically, in the past, when the first exterior cover 410 and the second exterior cover 411 were provided in the above-mentioned manner, a fixing member was required to abut the seal member on the frame (machine body side), and the openings that the first exterior cover 410 and the second exterior cover 411 close were divided by the fixing member, but in the present invention, it is not necessary to provide a fixing member, and a large space where no fixing member is provided in the middle can be opened to the outside.

[0072] (Item 5) The work machine 1 described in any one of items 2 to 4, wherein the second exterior cover 411 is arranged above the first exterior cover 410, the second exterior cover in a closed state and the first exterior cover in a closed state overlap in a plan view, and the first seal member 45 is fixed to the second exterior cover 411.

[0073] According to the work machine 1 of item 5, the first exterior cover 410 can be opened and closed below the second exterior cover 411, and the second exterior cover 411 can be opened and closed above the first exterior cover 410. Therefore, the first exterior cover and the second exterior cover 411 can be opened and closed in different directions at different height positions, making it easier to access the devices 60, 61, 62, 63, and 64 on the frame 21.

[0074] (Item 6) The work machine 1 described in item 5, in which the first sealing member 45 is fixed to the underside of the second exterior cover 411, inward from the outer edge of the second exterior cover 411 in a closed state as viewed from above, and the first exterior cover 410 in a closed state abuts against the first sealing member 45 of the second exterior cover 411 in a closed state.

[0075] According to the work machine 1 of item 6, even if the first exterior cover 410 and the second exterior cover 411 are opened and closed in different directions, the first sealing member 45 is prevented from being subjected to the pulling and twisting forces caused by the opening and closing of the first exterior cover 410 concentrating in one place, thereby preventing damage.

[0076] (Item 7) The work machine 1 according to any one of items 1 to 6, wherein the fixed piece portion 450 and the curved piece portion 451 are continuously and integrally molded from an elastic resin material.

[0077] According to the work implement 1 of item 7, the fixed piece 450 and the curved piece 451 are continuously and integrally molded from an elastic resin material, ensuring their continuity. This prevents concentrated force from acting on the connection between the fixed piece 450 and the curved piece 451, preventing breakage or damage.

[0078] (Item 8) The fixing piece portion 450 is formed in a band shape extending in one direction and having a thickness in a direction perpendicular to the one direction, the curved piece portion 451 extends from one end of the fixing piece portion 450 in a short direction perpendicular to the longitudinal direction and thickness direction, the fixing piece portion 450 is positioned with its longitudinal direction in a direction intersecting a first direction in which the first exterior cover 410 and the exterior member 411 move relative to each other when the first exterior cover 410 is opened or closed, and is fixed to either the first exterior cover 410 or the exterior member 411.

[0079] According to the work machine 1 of item 8, the first seal member 45 can be arranged in the longitudinal direction, making it possible to seal over a wide area.

[0080] (Item 9) The work implement (1) according to item 8, wherein the curved piece (451) is curved with axes (L1, L2) extending in a direction along the longitudinal direction of the fixed piece (450) as the center of curvature.

[0081] According to the work machine 1 of item 9, the centers of curvature L1, L2 of the curved piece portion 451 are set based on the direction (extension direction) along the longitudinal direction of the fixed piece portion 450, so that the shape (curvature) of the curved piece portion 451 becomes suitable for opening and closing the first outer cover 410.

[0082] (Item 10) The curved piece portion 451 is a direction change portion 451a extending from the one end of the fixed piece portion 450, the direction change portion 451a being curved around a first axis L1 extending in a direction along the longitudinal direction of the fixed piece portion 450 as a center of curvature, and a contact portion 451b extending from the tip of the direction change portion 451a, the contact portion 451b being curved around a second axis L2 extending in a direction along the first axis as a center of curvature, and being formed so as to be able to come into contact with either the first exterior cover 410 or the exterior member 411.

[0083] According to the work machine 1 of item 10, the direction change portion 451a and the contact portion 451b included in the curved piece portion 451 are continuously curved, so even if pulling or twisting occurs when the first exterior cover 410 is opened or closed, the force is prevented from concentrating in one place.

[0084] (Item 11) The work machine 1 described in item 8, wherein the first sealing member 45 is attached to the exterior member 411, the first exterior cover 410 has a protruding piece 410a protruding in the first direction toward the exterior member 411, and the protruding piece 410a is in line contact with the curved piece portion 451.

[0085] According to the work machine 1 of item 11, opening and closing the first exterior cover 410 causes the protrusion 410a to come into line contact with the curved piece portion 451 of the first sealing member 45, resulting in a sealed (sealed) state between the first exterior cover 410 and the exterior member 411, and causes the protrusion 410a to move away from the curved piece portion 451 of the first sealing member 45, resulting in an open state between the first exterior cover 410 and the exterior member 411.

[0086] (Item 12) The work machine 1 described in item 8, wherein the first seal member 45 is attached to the exterior member 411, the first exterior cover 410 has an attachment piece 410a protruding in the first direction toward the exterior member 411, the exterior body 4 has a second seal member 46 molded from an elastic material and enveloping the attachment piece 410a, and the second seal member 46 makes line contact with the curved piece portion 451 from the first direction.

[0087] According to the work implement 1 of item 12, opening and closing the first exterior cover 410 causes the second seal member 46 enclosing the mounting piece 410a to come into line contact with the curved piece portion 451 of the first seal member 45, resulting in a sealed state between the first exterior cover 410 and the exterior member 411, and the second seal member 46 to move away from the curved piece portion 451 of the first seal member 45, resulting in an open state between the first exterior cover 410 and the exterior member 411. In particular, because the second seal member 46 is made of an elastic material, the second seal member 46 elastically deforms while in line contact with the curved piece portion 451 of the first seal member 45, and the action of this restoring force also enhances the sealing performance.

[0088] (Item 13) The work machine 1 described in item 10, wherein the exterior member includes a flat first arrangement surface 415a on which the fixing piece portion 450 is placed, and a curved second arrangement surface 415b continuous with the first arrangement surface 415a on which the direction change portion 451a is placed.

[0089] According to the work implement 1 of item 13, by overlapping the direction changer 451a on the second arrangement surface 415b, the direction changer 451a is allowed to deform in a direction away from the exterior member (second arrangement surface 415b) 411, while being restricted from deforming carelessly toward the exterior member 411. This prevents the contact portion 451b of the curved piece portion 451 from deforming carelessly, and maintains it in a position where it can contact either the first exterior cover 410 or the exterior member.

[0090] (Item 14) The work machine 1 described in any one of items 1 to 15, wherein the fixing piece portion 450 of the first seal member 45 is fixed to either the first exterior cover 410 or the exterior member 411 via a rivet R.

[0091] According to the work machine 1 of item 14, the first seal member 45 can be fixed in an appropriate position with a simple configuration.

[0092] The present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the spirit of the present invention.

[0093] In the above embodiment, the work machine 1 is a backhoe, but is not limited to this. For example, the work machine 1 may be a construction machine (vehicle) other than a backhoe, or may be an agricultural machine (work vehicle) such as a tractor.

[0094] In the above embodiment, a diesel engine is used as the prime mover 60, which is one of the devices, but this is not limiting, and the prime mover 60 may be, for example, an internal combustion engine such as a gasoline engine, an LPG engine, or a hydrogen engine. Furthermore, the prime mover 60 is not limited to an internal combustion engine, and may be an electric motor.

[0095] In the above embodiment, the first seal member 45 seals between the exterior members 410, 411 arranged in the direction in which the first axis S2 extends (the up-down direction), but this is not limited thereto. For example, the first seal member 45 may seal between two exterior members arranged in the front-rear direction, the sideways direction, or a diagonal direction. Furthermore, of the two exterior members 410, 411 sealed by the first seal member 45, the other exterior member 411 is the second exterior cover 411 that can be opened and closed around the second axis S3 as a rotation center, but this is not limited thereto. Of the two exterior members 410, 411, the other exterior member 411 may be a non-openable (fixed) exterior cover or a frame member that surrounds one of the exterior members (the first exterior cover 410). In other words, the other exterior member is not limited to a cover, and may be any member that constitutes the exterior body 4.

[0096] In the above embodiment, the fixed piece portion 450 and the curved piece portion 451 (the direction change portion 451a and the contact portion 451b) are set to the same thickness, but this is not limiting. For example, the fixed piece portion 450 and the curved piece portion 451 (the direction change portion 451a and the contact portion 451b) may be set to different thicknesses. However, because an attachment force (fixing force) acts on the fixed piece portion 450, the thickness may be made thinner from the fixed piece portion 450 to the curved piece portion 451. In this case, the thickness may be made thinner in stages from the fixed piece portion 450 to the tip of the curved piece portion 451, or the thickness may be made thinner gradually (continuously) from the fixed piece portion 450 to the tip of the curved piece portion 451.

[0097] In the above embodiment, the fixed piece 450 and the curved piece 451 are arranged with a positional deviation in a direction perpendicular to the direction in which the opposing edges of the two exterior members face each other, and the tip of the curved piece 451 protrudes from the base end side of the fixed piece 450, while the base end side of the curved piece 451 protrudes from the tip of the fixed piece 450, but this is not limited to this. For example, the fixed piece 450 and the curved piece 451 may be arranged without a positional deviation, and the base end of the fixed piece 450 and the tip of the curved piece 451 may coincide, and the base end of the curved piece 451 and the tip of the fixed piece 450 may coincide.

[0098] In the above embodiment, the first seal member 45 is attached only to the area corresponding to the first exterior cover 410, and the tubular seal member 43 is attached to the other portions, but this is not limited to this. For example, it is of course possible to replace some or all of the seal members 43 of the work machine 1 in the above embodiment with the first seal members 45.

[0099] In the above embodiment, the seal mounting surface 415 includes the second arrangement surface 415b on which the direction changer 451a is arranged, but is not limited to this. For example, the seal mounting surface 415 may have only the planar first arrangement surface 415a on which the fixing piece 450 is arranged.

[0100] In the above embodiment, the second exterior part 41 includes the second exterior cover 411, which is an exterior member adjacent to the first exterior cover 410 and can be opened and closed around the second axis S3 as a rotation center, but is not limited to this. The second exterior cover 411 may be an exterior member that cannot be opened and closed, similar to the exterior fixed cover 412. In other words, the exterior member adjacent to the first exterior cover 410 may be openable or closed.

[0101] In the above embodiment, the first axis S2, which is the rotation center of the first exterior cover 410, extends in the up-down direction, but is not limited to this. The first axis S2, which is the rotation center of the first exterior cover 410, may extend in the front-rear direction or the sideways direction. In addition, if the second exterior cover 411 is openable and closable, the second exterior cover 411 may be openable and closable around a second axis S3, which extends in a direction perpendicular to the first axis S2, as the rotation center, with the first axis S2 as the reference. [Explanation of symbols]

[0102] 1: Work equipment 2: Aircraft 3: Running gear 4: Exterior body 21: Swivel base (frame) 45: First sealing member 46: Second seal member 60: Prime mover (equipment) 61: Radiator (equipment) 62: Oil cooler (equipment) 63: Hydraulic oil tank (equipment) 64: Fuel tank (equipment) 65: Hydraulic pump (equipment) 410: First exterior cover (exterior member) 410a: Mounting piece (projection piece) 411: Second exterior cover (exterior member) 412: Exterior fixing cover (exterior part) 413: Side exterior member (exterior member) 415: Seal mounting surface 415a: 1st placement surface 415b: 2nd placement surface 450: Fixed piece 451: Curved piece 451a: Direction change section 451b: Contact part D: Predetermined distance L1: 1st axis line (axis line) L2: 2nd axis (axis) R: Rivet R1: radius of curvature R2: radius of curvature R3: radius of curvature S1: Horizontal axis (axis) S2: 1st axis (axis) S3: 2nd axis (axis)

Claims

1. an airframe including a frame supporting the equipment; an exterior body that covers the device, The exterior body is a first exterior cover that can be opened and closed around a first axis that extends in a predetermined direction; an exterior member adjacent to the first exterior cover in a closed state; a first seal member that seals between the first exterior cover and the exterior member in a closed state, The first seal member is a fixing piece portion fixed to either the first exterior cover or the exterior member; a curved piece portion that is elastically deformable and has one end that is continuous with one end of the fixed piece portion and the other end that is a free end, and the portion between the one end and the other end is curved in a convex manner toward the other of the first exterior cover or the exterior member in a closed state, and is formed so as to be able to come into contact with the other.

2. The exterior body is The work machine according to claim 1 , further comprising, as the exterior member, a second exterior cover that can be opened and closed about a second axis that extends in a direction intersecting with the first axis.

3. 3. The work machine according to claim 2, wherein the first exterior cover can be opened and closed while the second exterior cover is kept in a closed state, and the second exterior cover can be opened and closed while the first exterior cover is kept in a closed state.

4. 3. The work machine according to claim 2, wherein by opening the first exterior cover and the second exterior cover, the opening that was closed by the first exterior cover in the closed state and the opening that was closed by the second exterior cover in the closed state are opened to the outside as a continuous common opening.

5. the second exterior cover is disposed above the first exterior cover, The second exterior cover in the closed state and the first exterior cover in the closed state overlap each other in a plan view, The work machine according to claim 2 , wherein the first seal member is fixed to the second exterior cover.

6. the first seal member is fixed to the lower surface of the second exterior cover on the inner side of an outer edge portion of the second exterior cover in a closed state in a plan view, The work machine according to claim 5 , wherein the first exterior cover in the closed state abuts against the first seal member of the second exterior cover in the closed state.

7. 2. The work machine according to claim 1, wherein the fixed piece and the curved piece are integrally formed from an elastic resin material.

8. The fixing piece portion is formed in a strip shape extending in one direction and having a thickness in a direction perpendicular to the one direction, the curved piece portion extends from one end of the fixed piece portion in a short direction perpendicular to the longitudinal direction and thickness direction, 2. The work machine according to claim 1, wherein the fixing piece portion is fixed to either the first exterior cover or the exterior member, with its longitudinal direction positioned in a direction intersecting a first direction in which the first exterior cover and the exterior member move relative to each other when the first exterior cover is opened or closed.

9. The work machine according to claim 8, wherein the curved piece portion is curved with a center of curvature that is an axis extending in a direction along the longitudinal direction of the fixed piece portion.

10. The curved piece portion is a direction change portion extending from the one end of the fixed piece portion, the direction change portion being curved with a first axis extending in a direction along the longitudinal direction of the fixed piece portion as a curvature center; 9. The work machine according to claim 8, further comprising: a contact portion extending from a tip of the direction change portion, the contact portion being curved with a second axis extending in a direction along the first axis as a center of curvature, and being formed so as to be able to come into contact with the other of the first exterior cover or the exterior member.

11. the first seal member is attached to the exterior member, the first exterior cover has a protruding piece that protrudes in the first direction toward the exterior member, The work machine according to claim 8, wherein the protruding piece is in line contact with the curved piece portion.

12. the first seal member is attached to the exterior member, the first exterior cover has an attachment piece that protrudes in the first direction toward the exterior member, the exterior body includes a second seal member molded from an elastic material and enclosing the mounting piece, The work machine according to claim 8 , wherein the second seal member is in line contact with the curved piece portion from the first direction.

13. The work machine according to claim 10, wherein the exterior member includes a first planar arrangement surface on which the fixing piece portion is superimposed, and a second arrangement surface continuous with the first arrangement surface, the second arrangement surface being a curved surface on which the direction change portion is superimposed.

14. The work machine according to claim 1 , wherein the fixing piece portion of the first seal member is fixed to either the first exterior cover or the exterior member via a rivet.

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