JP6002091B2 - Working machine - Google Patents

Description

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

  Conventionally, there is a hydraulic excavator disclosed in Patent Document 1 as a working machine. This hydraulic excavator includes a part of an exterior cover that covers a mounted device mounted on the airframe, and includes an open / close cover that is opened and closed to inspect the mounted device. In addition, this hydraulic excavator is located at the storage position inside the exterior cover when the opening / closing cover is closed, and when the opening / closing cover is opened, the opening / closing cover is interlocked with the opening operation to move from the storage position. A maintenance component is provided that is movable to a maintenance position outside the exterior cover.

Japanese Patent No. 4875600

In the conventional hydraulic excavator, the opening / closing cover is attached to a support frame disposed in the exterior cover by a hinge member so as to be freely opened and closed. The hinge member includes a fixed hinge attached to the support frame, and a movable hinge attached to the fixed hinge so as to be rotatable.
The maintenance component is attached to the movable hinge of the hinge member via a mounting bracket. For this reason, in the conventional hydraulic excavator, since the weight of the opening / closing cover and the weight of the maintenance part are applied to the movable hinge of the hinge member, the hinge member needs to have sufficient strength. Further, if a maintenance component is attached to the hinge member that supports the opening / closing cover, it may be necessary to remove the maintenance component when repairing the opening / closing cover. In addition, there is a problem that the attachment position of the maintenance component is limited to the hinge member, and the degree of freedom of the attachment position of the maintenance component is low.

  This invention makes it a subject to provide the working machine which can solve the said problem.

The technical means taken by the present invention to solve the technical problems are characterized by the following points.
The invention according to claim 1 further includes an opening / closing cover that covers the mounted device mounted on the airframe and is opened and closed to inspect the mounted device, and the opening / closing cover is attached to be freely opened and closed via a hinge member. Maintenance parts are movably attached to a support member made of a member different from the member, via a movable bracket, between a storage position inside the opening / closing cover and a maintenance position outside the opening / closing cover, and maintenance is performed in conjunction with the opening operation of the opening / closing cover. The hinge member side and the movable bracket side are interlocked and connected by an interlocking member so that the component can move from the storage position to the maintenance position.

  In the invention according to claim 2, the engine which is a part of the mounted device is accommodated in the opening / closing cover, the opening / closing cover can be opened / closed rearward of the engine, and the support member is located behind the engine and in the middle in the left-right direction. The side of the support member on one side in the left-right direction is a maintenance component storage position, and a position behind the support member and outside the mounting device storage space is a maintenance position. And

According to a third aspect of the present invention, there is provided a positioning means that automatically operates when the maintenance part is set to the maintenance position and restricts the movement of the opening / closing cover in the closing direction at the position where the opening / closing cover is opened. .
According to a fourth aspect of the present invention, the hinge member includes a fixed hinge and a movable hinge that is rotatably attached to the fixed hinge about a vertical axis. It is attached and can be opened and closed in a laterally open manner. The movable bracket is supported by the support member so as to be rotatable about the vertical axis, and an interlocking arm that rotates integrally with the movable bracket is provided, and the interlocking arm and the hinge member are movable. The hinge is interlocked and connected by an interlocking member made of a rod.

The present invention has the following effects.
According to the first aspect of the present invention, the maintenance part moves from the storage position to the maintenance position in conjunction with the opening / closing cover opening operation, so that the dead space is effectively used as the maintenance part storage space when the opening / closing cover is closed. When the open / close cover is open, the work space required for maintenance parts can be sufficiently maintained, and the hinge member does not take the weight of the maintenance parts. There is no need to remove the maintenance parts when repairing the opening / closing cover. In addition, the degree of freedom of the installation position of the maintenance parts is high.

According to the second aspect of the present invention, the support member that supports the maintenance component is located at the rear side of the engine and in the middle in the left-right direction, and the position behind the support member and outside the mounted device housing space is the maintenance position. Therefore, in a state where the opening / closing cover is opened, the range for accessing the maintenance parts is wide, and maintenance is easy.
According to the third aspect of the invention, the positioning means for restricting the movement of the opening / closing cover in the closing direction when the opening / closing cover is opened automatically operates when the maintenance component is set to the maintenance position, which is convenient.

  According to the invention of claim 4, the opening / closing cover is supported so as to be rotatable about the vertical axis so as to be opened and closed in a laterally open manner, and the movable bracket is supported so as to be rotatable about the vertical axis. The movable bracket and the movable bracket can be interlocked and connected with a simple interlocking member, and the structure can be simplified.

It is a side view of a backhoe. It is a right view of a turntable. It is the perspective view which looked at the turning frame from diagonally right rear. It is a rear view of a turntable. It is a top view of the internal rear part of a turntable. It is a perspective view which shows the state which the opening / closing cover opened. It is a top view which shows the interlocking mechanism which interlocks an opening-and-closing cover and a reserve tank. It is a top view which shows the storage position and maintenance position of a reserve tank. It is a disassembled perspective view of a hinge member. It is a perspective view which shows the tank support mechanism which supports a reserve tank, Comprising: (a) is a figure which shows the state in which a reserve tank is located in a storage position, (b) is a figure which shows the state in which a reserve tank is located in a maintenance position. is there. (A) is a top view which shows the storage position and maintenance position of a reserve tank, (b) is a rear view which shows the storage position and maintenance position of a reserve tank. It is a perspective view which shows the other example of a hinge member. It is a figure which shows the other example of the positioning means in the state which closed the opening / closing cover, (a) is the figure seen from the top, (b) is a rear view. It is a figure which shows the other example of the positioning means in the state which opened the opening-and-closing cover, (a) is the figure seen from the top, (b) is a rear view.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a backhoe 1 exemplified as a working machine.
The backhoe 1 includes a lower traveling device 2 and a swivel base 3 (airframe) supported by the traveling device 2 so as to be pivotable about an axis in the vertical direction.
A cabin 4 is mounted on the swivel 3, and a driver's seat 5 is provided in the cabin 4.

A working device 6 is provided at the front of the swivel base 3. The working device 6 includes a boom 7 and an arm and a bucket (not shown). The base of the boom 7 is pivotally supported by a swing bracket 8 and is driven to swing up and down by a boom cylinder 9.
As shown in FIG. 2, the swing bracket 8 is supported by a support bracket 11 provided at the front portion of the swivel base 3 so as to be swingable to the left and right around the vertical axis.

The traveling device 2 includes track frames 13 on both left and right sides, and a crawler traveling device 14 is attached to each of the left and right track frames 13.
As shown in FIGS. 2 and 3, the swivel base 3 has a swivel frame 15 serving as a skeleton configured by combining plate materials and the like. The swivel frame 15 has a swivel board 16 made of a thick plate material that forms the bottom of the swivel base 3. The support bracket 11 is fixed to the front portion of the swivel board 16, and a pair of left and right vertical ribs 17 </ b> L and 17 </ b> R extend rearward from the support bracket 11. The left and right vertical ribs 17L and 17R are fixed on the turning substrate 16. A swing cylinder 12 is provided on the right side of the swivel board 16. The swing cylinder 12 is a hydraulic cylinder that swings the swing bracket 8 left and right.

As shown in FIGS. 1 and 4, a weight 18 constituting the rear part of the swivel base 3 is attached to the rear part of the swivel frame 15. On both the left and right sides of the swivel frame 15, a swivel cover 19 constituting the exterior of the swivel base 3 is attached.
As shown in FIGS. 2 and 5, mounted devices such as the engine 20, the radiator 21, and the oil cooler 22 are mounted on the rear portion of the turning frame 15.

The engine 20 is horizontally disposed in the left-right direction, a radiator 21 is disposed on the right side of the engine 20, and an oil cooler 22 is disposed on the right side of the radiator 21. A cooling fan 23 is provided on the right side of the engine 20, and a hydraulic pump 24 is provided on the left side of the engine 20.
As shown in FIGS. 4, 5, and 6, the engine 20, the radiator 21, the oil cooler 22, and the like are covered with an exterior cover 25 attached to the revolving frame 15.

  The exterior cover 25 includes left and right side covers 27L and 27R that cover both the left and right sides of a mounted device accommodation space (engine room) that is an internal space of the exterior cover 25, and an upper cover 28 that covers the upper portion of the mounted device accommodation space. And an openable / closable cover 29 (bonnet) that covers the rear of the mounted device housing space (the rear of the engine 20) and is openable and closable. The front side of the on-board device accommodation space is closed by a front cover (not shown).

As shown in FIGS. 2, 3, and 5, a support frame 31 that supports the exterior cover 25 and the cabin 4 is provided in the exterior cover 25.
The support frame 31 includes a plurality of support members 32, 33, and 34 that are spaced apart in the left-right direction, and a cross beam member 35 that connects the upper portions of the support members 32, 33, and 34.

The cross beam member 35 is made of a thick plate material that is long in the left-right direction and is arranged so that the plate surface faces in the up-down direction, and is positioned above the rear portion of the engine 20.
Three support members 32, 33, and 34 are provided in the present embodiment, and are disposed on the left and right sides of the transverse beam member 35 and in the middle in the left and right direction of the transverse beam member 35. The left and right support members are referred to as front support members 32 and 33, and the support member in the middle in the left and right direction is referred to as a rear support member 34.

The lower part of the left front strut 32 is positioned on the left front side of the engine 20, is erected on the turning frame 15, and is inclined so that the middle part moves upward as it goes rearward. Extends upward and is connected to the left lower surface of the cross beam member 35.
The lower part of the right front strut 33 is located on the right front side of the engine 20, is erected on the turning frame 15, and is inclined so that the middle part moves upward as it goes rearward. Extends rearward and is connected to the lower right side of the cross beam member 35.

The rear strut 34 is formed along the vertical direction, and a vertical portion 34a that is erected on the revolving frame 15 behind a middle portion in the left-right direction of the engine 20 and extends forward from the vertical portion 34a. It consists of the front-back direction part 34b connected to the lower surface of the middle part of the left-right direction of the member 35. As shown in FIG.
As shown in FIG. 5, the left and right sides of the open / close cover 29 are supported by the support frame 31 via a hinge member 36 so as to be freely opened and closed.

As shown in FIGS. 7 to 9, the hinge member 36 rotates the fixed hinge 37 attached to the support frame 31, the movable hinge 38 to which the opening / closing cover 29 is attached, and the fixed hinge 37 and the movable hinge 38. And a hinge shaft 39 that is freely connected.
The fixed hinge 37 is made of a plate material, and is formed in an L shape from a vertical wall 37a whose plate surface faces front and rear, and a lower wall 37b extending rearward from the lower end of the vertical wall 37a. A reinforcing rib plate 40 is fixed across the rear surface of the vertical wall 37a of the fixed hinge 37 and the upper surface of the lower wall 37b.

  The fixed hinge 37 is attached and fixed to a hinge bracket 41 fixed to the support frame 31. The hinge bracket 41 is made of a plate material, and includes a vertical wall 41a whose plate surface faces front and rear, and a lower wall 41b extending forward from the lower end of the vertical wall 41a. The hinge bracket 41 is fixed to the middle portion of the front support 32 on the left side of the support frame 31, and the vertical wall 37a of the fixed hinge 37 is overlapped with the front surface of the vertical wall 41a of the hinge bracket 41 so that the vertical wall It is bolted to 41a.

The movable hinge 38 includes a cylindrical boss 42, a movable hinge main body 43 fixed to the boss 42, and a connecting portion 44 provided on the movable hinge main body 43.
The boss 42 is arranged in the vertical direction (having a vertical axis).
The movable hinge main body 43 is made of a plate material, and the plate material is arranged vertically so that the plate surface of the plate material faces the horizontal direction. The movable hinge body 43 includes a base wall 43a fixed to the boss 42, a mounting wall 43b to which the opening / closing cover 29 is attached, and a connecting wall 43c that connects the mounting wall 43b and the base wall 43a.

  One end side of the base wall 43a in the direction along the plate surface and perpendicular to the vertical direction is fixed to the boss 42, and the connecting wall 43c is connected to the other end side. In the mounting wall 43b, a mounting bracket 45 is bolted to one end side in a direction along the plate surface and orthogonal to the vertical direction, and a connecting wall 43c is connected to the other end side. The mounting bracket 45 is fixed to the left inner surface of the opening / closing cover 29.

A connecting portion 44 is fixed to one side surface of the mounting wall 43b of the movable hinge body 43 in the plate thickness direction. The connecting portion 44 is made of a plate material, and is provided so that the plate surface faces up and down. In addition, a connecting hole 46 is formed in the connecting portion 44 in a vertically penetrating manner.
The hinge shaft 39 is disposed so that its axis is along the vertical direction, and is erected on the lower wall 37 b of the fixed hinge 37. A boss 42 of the movable hinge 38 is externally fitted to the hinge shaft 39 so as to be rotatable around the axis from above. The boss 42 of the movable hinge 38 is secured from the hinge shaft 39 by a retaining member 47. As a result, the open / close cover 29 is rotatable about the hinge shaft 39 in the vertical direction, and the open / close cover 29 is opened and closed in a laterally open manner by rotating the open / close cover 29 about the hinge shaft 39.

  FIG. 7 shows a state in which the open / close cover 29 is closed, and the right and left sides of the open / close cover 29 are engaged with an engaging portion 48 provided on the support frame 31 side, thereby opening and closing the closed state shown in FIG. A latch 49 for temporarily fixing the cover 29 so as not to open is provided. The latch 49 is fixed to an operation lever 50 that can be operated from the outside of the opening / closing cover 29, and the latched state of the latch 49 with respect to the locking portion 48 can be released by the operation lever.

  As shown in FIG. 5, a reserve tank 51 (maintenance part) that stores a part of engine cooling water in the radiator 21 is disposed on the rear side of the left side portion of the engine 20. The reserve tank 51 is connected to the connection port 53 of the cap 52 of the radiator 21 by a connection hose, and the engine coolant leaked from the radiator 21 when the coolant temperature of the engine coolant rises is connected to the reserve tank 51 via the connection hose. When the temperature of the engine cooling water decreases, the engine cooling water is sucked back from the reserve tank 51 to the radiator 21 via the connection hose.

As shown in FIG. 7, the reserve tank 51 is supported on the support frame 31 by a tank support mechanism 54 (maintenance component support mechanism).
As shown in FIGS. 7, 8, and 10, the tank support mechanism 54 includes a support base 56 fixed to the support frame 31, a rotation support shaft 57 erected on the support base 56, and the rotation support shaft. A movable bracket 58 rotatably supported by 57 and an interlocking arm 59 that rotates integrally with the movable bracket 58 are provided.

  The support base 56 is made of a plate material and is arranged so that the plate surface faces up and down. The support base 56 includes a support wall portion 56a disposed on the right side of the middle portion of the rear support 34 of the support frame 31, and extends to the left from the front portion of the support wall portion 56a. The support wall portion 56a and the extension wall portion 56b are fixed to the rear support post 34 of the support frame 31 by welding or the like. The right surface of the support base 56 is formed as a surface along the front-rear direction, and the surface is a restriction surface 60 that restricts the movement of the opening / closing cover 29 in the closing direction when the opening / closing cover 29 is open.

The rotation support shaft 57 is disposed along the vertical direction on the right side of the middle portion of the rear support 34 of the support frame 31, and stands on the support wall portion 56 a of the support base 56.
The movable bracket 58 includes a cylindrical boss 61, a bracket body 62 fixed to the boss 61, and a tank bracket 63 to which the reserve tank 51 is attached and supported.

The boss 61 has an axial center in the vertical direction, and is externally fitted to the rotation support shaft 57 so as to be rotatable from above. Further, the boss 61 is retained in a state where it can move up and down within a predetermined range in the axial direction with respect to the rotation support shaft 57.
The bracket body 62 is made of a plate material, and is arranged vertically so that the plate surface faces the horizontal direction. The bracket main body 62 is extended from the base wall 62a, a base wall 62a fixed to the boss 61, a regulation wall 62b for restricting movement of the open / close cover 29 in the closing direction with the open / close cover 29 open, and a base wall 62a. The extending wall 62c and the distal end side wall 62d provided on the extending end side of the extending wall 62c are configured.

  One side surface of the base wall 62 a is fixed to the lower portion of the outer peripheral surface of the boss 61. The restriction wall 62 b extends downward from the base wall 62 a and projects downward from the boss 61. The extending wall 62c extends from the base wall 62a in the direction of the plate surface of the base wall 62a and in the direction perpendicular to the vertical direction. The leading end side wall 62d extends from the extending end of the extending wall 62c toward the boss 61 arrangement side. A tank bracket 63 is fixed to a surface of the tip side wall 62d opposite to the surface facing the boss 61.

The interlocking arm 59 is formed of a plate material, and is arranged so that the plate surface faces up and down, and one end side (base end side) in the longitudinal direction is fixed to the upper portion of the outer peripheral surface of the boss 61. A connecting hole 64 is formed on the other end side (front end side) in the longitudinal direction of the interlocking arm 59 so as to penetrate vertically.
As shown in FIG. 8, the connecting portion 44 of the movable hinge 38 and the distal end side of the interlocking arm 59 are interlocked and connected by an interlocking member 65. This interlocking member 65 is composed of a rod, and as shown in FIG. 9, a linear rod main body 65a, and downward insertion portions 65b provided at both ends in the longitudinal direction of the rod main body 65a, 65c.

The insertion part 65 b on one end side (left side) of the interlocking member 65 is inserted from above into the connection hole 46 of the connection part 44 of the movable hinge 38. The insertion part 65c on the other end side (right side) of the interlocking member 65 is inserted into the connecting hole 64 of the interlocking arm 59 from above.
In the present embodiment, as described above, the rear strut 34 of the support frame 31 is a support member for movably supporting the maintenance component 51 between the storage position and the maintenance position. The supporting member is not limited to this, and the supporting member may be constituted by a member different from the rear support column 34. For example, the support member that supports the maintenance component 51 may be a member that is attached to the weight 18 or may be a member that is erected on the revolving frame 15 separately from the support frame 31.

In the backhoe 1 having the above-described configuration, when the open / close cover 29 is closed, the movable hinge 38 of the hinge member 36 has a surface on which the connecting portion 44 of the mounting wall 43b is provided on the right side as shown in FIG. The movable bracket 58 is positioned so that the base wall 62a of the bracket body 62 is along the left-right direction. The interlocking arm 59 extends from the boss 61 obliquely to the right and forward, and the interlocking member 65 is positioned such that the rod body 65a is along the left-right direction. When the open / close cover 29 is closed, the reserve tank 51 is located in the exterior cover 25 (in the mounted device accommodating space) and on the left side of the rear column 34 and behind the engine 20. This position is the storage position of the reserve tank 51.

  When the opening / closing cover 29 is rotated and rotated leftward about the hinge shaft 39 from this closed state, the movable hinge body 43 rotates clockwise to the left in plan view as shown by a solid line in FIG. Pull 65 to the left. Then, the interlocking arm 59 is pulled to the left, and the movable bracket 58 rotates to the right counterclockwise in plan view about the rotation support shaft 57. As a result, the reserve tank 51 moves together with the movable bracket 58, and moves from the storage position to a position behind the rear column 34 and outside the mounting device storage space. This position is a maintenance position.

Therefore, when the open / close cover 29 is opened, the reserve tank 51 comes out from the mounted device accommodating space, so that a sufficient work space for maintenance of the reserve tank 51 is obtained and maintenance is easy. In the maintenance position, there is no obstacle on the left and right sides of the reserve tank 51, and the range in which the reserve tank 51 can be accessed is wide.
Further, when the open / close cover 29 is closed, the dead space in the mounted device accommodation space can be effectively used as the storage position.

  Further, as shown in FIG. 5, when the reserve tank 51 is in the storage position, an oil inspection rod 66 for checking the lubricating oil of the engine 20 is disposed in front of the reserve tank 51. Therefore, it is difficult to access the oil detection rod 66 when the reserve tank 51 is in the storage position. However, when the reserve tank 51 is in the maintenance position, there is a storage space for the reserve tank 51 behind the oil detection rod 66. Easy access to the oil bar 66.

  In the case where the reserve tank 51 is supported on the hinge member 36 as in the prior art, since the weight of the opening / closing cover 29 and the weight of the reserve tank 51 are applied to the hinge member 36, the hinge member 36 is more than necessary. However, in this embodiment, the reserve tank 51 is supported by a member different from the hinge member 36 and is not supported by the hinge member 36, so that the weight of the reserve tank 51 is supported by the hinge member 36. It is not necessary to increase the strength of the hinge member 36 more than necessary. Further, in the case where the reserve tank 51 is supported by the hinge member 36 as in the prior art, the reserve tank 51 may become an obstacle when the open / close cover 29 is repaired, and the reserve tank 51 may need to be removed. However, in this embodiment, since the reserve tank 51 is separated from the hinge member 36, it is not necessary to remove the reserve tank 51 when repairing the opening / closing cover 29. Further, since the reserve tank 51 is supported by the movable bracket 58 at a position away from the hinge member 36, and the hinge member 36 side and the movable bracket 58 side are interlocked and connected by the interlocking member 65, the mounting position of the reserve tank 51 is determined. High degree of freedom.

  When the reserve tank 51 is located at the storage position, as shown in FIG. 10A, the regulation wall 62b is placed on the rear portion of the upper surface of the support base 56 (the rear side of the boss 61), and the boss 61 is supported. The upper surface of the base 56 is spaced upward. During the movement of the reserve tank 51 from the storage position to the maintenance position, the lower surface of the regulation wall 62b slides on the upper surface of the support base 56, and when the reserve tank 51 is positioned at the maintenance position, the regulation wall 62b is moved to the support base 56. The movable bracket 58 moves downward. Then, the restriction wall 62 b of the movable bracket 58 is positioned on the right side of the support base 56 and faces the restriction surface 60. Then, when the restriction wall 62b comes into contact with the restriction surface 60, the movement of the opening / closing cover 29 in the closing direction from the opened state is restricted. At this time, the movement of the opening / closing cover 29 in the opening direction is also restricted.

Therefore, the regulating surface 60 and the regulating wall 62b constitute a positioning means that automatically operates when the reserve tank 51 is set to the maintenance position and regulates the movement of the opening / closing cover 29 in the closing direction at the position where the opening / closing cover 29 is opened. doing.
Further, when closing the opening / closing cover 29, the opening / closing cover 29 can be rotated in the closing direction by raising the movable bracket 58 to a position where the restriction wall 62b is disengaged upward from the restriction surface 60.

The above configuration is convenient because the positioning means automatically operates when the reserve tank 51 is set to the maintenance position. In addition, since the positioning means is provided in the tank support mechanism 54, the structure of the positioning means can be simplified as compared with the case where the positioning means is provided separately from the tank support mechanism 54.
In addition, as a positioning means, it is not limited to the thing of the said structure, The thing of another structure may be sufficient. For example, the stopper shaft is supported on a support member that rotates integrally with the movable bracket 58 so that the stopper shaft can be moved up and down, and a receiving portion that holds the stopper shaft in a raised state while the reserve tank 51 moves from the storage position to a position before the maintenance position. The stopper shaft may be moved downward when the reserve tank 51 is located at the maintenance position and inserted into the locking hole to restrict the movement of the opening / closing cover 29 in the closing direction. In this case, it is preferable to provide a spring member that urges the stopper shaft downward.

As shown in FIG. 2, a hose guide 68 for guiding a connection hose 67 that connects the reserve tank 51 and the radiator 21 is provided above the boss 61 of the movable bracket 58 (above the rotation support shaft 57).
As shown in FIG. 11, the hose guide 68 is formed by bending a bar, and has a front part 68a that is fixed to the rear column 34 and has one end fixed to the rear strut 34 and extends rightward, and the front part. A rear portion 68b positioned in parallel to the rear of 68a and a connecting portion 68c that connects the right ends of the front portion 68a and the rear portion 68b are formed in a U-shape in plan view that opens toward the left. .

A tank cap 69 provided at the upper end of the reserve tank 51 is for draining engine coolant that overflows from the reserve tank 51 and a coolant inlet / outlet port 70 to which a connection hose 67 that connects the reserve tank 51 and the radiator 21 is connected. The overflow port 71 is provided.
Note that an overflow tube (not shown) is connected to the overflow port 71, and the engine cooling water overflowed by the overflow tube is drained downward.

  The connection hose 67 is disposed from the coolant inlet / outlet port 70 between the front part 68a and the rear part 68b of the hose guide 68 to the connection port 53 of the cap 52 of the radiator 21. Then, the connection hose 67 is slackened between the hose guide 68 and the cooling water inlet / outlet port 70 so as to allow the position movement of the reserve tank 51. Further, when the reserve tank 51 is set to the storage position, the connection hose 67 passes behind the rear column 34.

In the above configuration, when the reserve tank 51 is moved between the storage position and the maintenance position, the portion of the connection hose 67 between the reserve tank 51 and the hose guide 68 is located behind the rear strut 34 together with the reserve tank. Since it only moves, the connection hose 67 is not sandwiched between the two members when the open / close cover 29 is closed.
In the above embodiment, the reserve tank 51 is exemplified as the maintenance part. However, the maintenance part may be other than the reserve tank 51.

FIG. 12 shows a modification of the hinge member 36.
In the hinge member 36 of the embodiment shown in FIGS. 1 to 11 described above, the fixed hinge 37 is formed in an L shape from the vertical wall 37a and the lower wall 37b, and the hinge shaft is attached to the lower wall 37b of the fixed hinge 37. 39 is erected, and the boss 42 of the movable hinge 38 is inserted into the hinge shaft 39, and the hinge shaft 39 has a cantilever structure.

On the other hand, the hinge member 36 shown in FIG. 12 has a fixed hinge 37 extending from a vertical wall 37a, an upper wall 37b extending from the upper end of the vertical wall 37a, and a lower end of the vertical wall 37a. A U-shape is formed from the lower wall 37c facing the upper wall 37b.
The boss 42 of the movable hinge 38 is arranged between the upper and lower walls 37b, 37c of the fixed hinge 37, and the hinge shaft 39 is inserted into the upper wall 37b, the boss 42 and the lower wall 37c from above, and the upper end side of the hinge shaft 39 is inserted. A mounting plate 72 fixed to the upper wall 37b is bolted.

In the hinge member 36 shown in FIG. 12, since the hinge shaft 39 has a double-sided structure, the hinge shaft 39 can be prevented from falling when the opening / closing cover 29 is opened, and the durability of the hinge shaft 39 is improved. Can do.
FIGS. 13 and 14 show another example of positioning means that automatically operates when the reserve tank 51 is set to the maintenance position and restricts the movement of the opening / closing cover 29 in the closing direction when the opening / closing cover 29 is opened. Yes. 13 shows the state of the positioning means in a state where the open / close cover 29 is closed (a state where the reserve tank 51 is in the storage position), and FIG. 14 shows a state where the open / close cover 29 is open (a state where the reserve tank 51 is in the maintenance position). The state of the positioning means is shown. In addition, the structure similar to the said embodiment by the structure shown in the figure attaches | subjects the same code | symbol, and abbreviate | omits description. Further, the configuration not shown is configured in the same manner as in the above embodiment.

The positioning means disclosed in FIGS. 13 and 14 includes an engagement pin 74 provided on the boss 61 of the tank support mechanism 54 and an engagement member 75 that is detachably engaged with the engagement pin 74. Has been.
The engaging pin 74 has a vertical axis, and a lower portion thereof is fixed to an upper portion of the outer peripheral surface of the boss 61, and an upper portion thereof protrudes upward from the boss 61.

  The engaging member 75 is formed of a plate material, and is disposed on the right side of the rear support column 34 (the longitudinal portion 34a thereof) so that the plate surface faces up and down. The left side portion of the engagement member 75 is formed in a bifurcated shape that opens leftward, and the bifurcated portion 76 that is bifurcated is engaged with the rear column 34 so as to sandwich the rear column 34. As a result, the rotation of the engaging member 75 around the vertical axis is restricted. The bifurcated portion 76 is supported by a support pin 77 fixed to the rear column 34. The support pin 77 penetrates the rear column 34 in the front-rear direction, and bifurcated portions 76 are placed on both front and rear sides of the support pin 77.

Further, on the right side of the engagement member 75, an engagement groove 78 having a U-shape in plan view that opens toward the right is formed. The engagement groove 78 is engageable with the engagement pin 74 (the engagement pin 74 can be relatively inserted into the engagement groove 78).
Further, a shaft insertion hole 79 is formed in the center side of the engagement member 75 in the front, rear, left, and right (between the bifurcated portion 76 and the engagement groove 78), and the upper portion of the rotation support shaft 57 is inserted through the shaft insertion hole 79. ing. Further, the engagement member 75 is movable up and down within a predetermined range around a portion contacting the support pin 77.

In the figure, reference numeral 80 denotes a beta pin for preventing the engagement member 75 from coming off, and reference numeral 81 denotes a washer.
In the positioning means, as shown in FIG. 13, the engagement pin 74 is located behind the rotation support shaft 57 when the open / close cover 29 is closed. The upper surface of the engagement pin 74 is slidably in contact with the lower surface of the engagement member 75, and the engagement member 75 is held by the support pin 77 and the engagement pin 74 in a substantially horizontal state. When the opening / closing cover 29 is moved in the opening direction from the state where the opening / closing cover 29 is closed, the interlocking arm 59 is pulled to the left side, so that the engagement pin 74 and the boss 61 are rotated around the axis of the rotation support shaft 57. Rotate counterclockwise.

  When the reserve tank 51 is positioned at the maintenance position, the engagement pin 74 is positioned immediately below the engagement groove 78 as shown in FIG. When the engagement pin 74 is positioned immediately below the engagement groove 78, the right side of the engagement member 75 moves downward as shown in FIG. 14B, and the engagement groove 78 fits into the engagement pin 74. (The engagement pin 74 is relatively inserted into the engagement groove 78). As a result, the opening / closing cover 29 is restricted from moving in the closing direction from the opened state. At this time, the movement of the opening / closing cover 29 in the opening direction is also restricted.

In order to close the opening / closing cover 29 from the opened state, the right side of the engaging member 75 is lifted to a position where the engaging pin 74 is detached from the engaging groove 78. Thereby, the opening / closing cover 29 can be rotated in the closing direction.
In the example shown in FIGS. 13 and 14, the right side of the engaging member 75 is illustrated as swinging up and down, but the entire engaging member 75 is translated in the vertical direction. It may be what you did.

3 Aircraft 20 Engine (equipped equipment)
29 Opening and closing cover 34 Rear support (supporting member)
36 Hinge member 37 Fixed hinge 38 Movable hinge 51 Reserve tank (maintenance part)
58 Movable bracket 59 Interlocking arm 60 Restricting surface (positioning means)
62b Restriction wall (positioning means)
65 Interlocking member

Claims (4)

  An open / close cover that covers the mounted device mounted on the airframe and that can be opened and closed to inspect the mounted device is provided, and the open / close cover is attached via a hinge member so that the device can be opened and closed. A maintenance part is movably attached to the member through a movable bracket to a storage position inside the opening / closing cover and a maintenance position outside the opening / closing cover, and the maintenance part moves from the storage position to the maintenance position in conjunction with the opening operation of the opening / closing cover. A working machine characterized in that the hinge member side and the movable bracket side are interlocked and connected by an interlocking member so as to be movable.   The opening / closing cover accommodates an engine that is a part of the mounted device, the opening / closing cover can freely open and close the rear of the engine, and the support member is located behind the engine and in the middle in the left-right direction. 2. The position according to claim 1, wherein a side on one side in the direction is a maintenance component storage position, and a position behind the support member and outside the mounting device storage space is a maintenance position. Work machine.   3. The positioning device according to claim 1, further comprising a positioning unit that automatically operates when the maintenance component is set to a maintenance position and restricts movement of the opening / closing cover in a closing direction when the opening / closing cover is opened. Work machine.   The hinge member has a fixed hinge and a movable hinge attached to the fixed hinge so as to be rotatable about a vertical axis, and the open / close cover is attached to the movable hinge of the hinge member on the left and right sides so as to open sideways. The movable bracket is supported by the support member so as to be rotatable about the vertical axis, and an interlocking arm that rotates integrally with the movable bracket is provided, and the interlocking arm and the movable hinge of the hinge member are composed of a rod. The working machine according to claim 1, wherein the working machine is interlocked and connected.

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