CN214411412U

CN214411412U - Working machine

Info

Publication number: CN214411412U
Application number: CN202120353794.5U
Authority: CN
Inventors: 伊藤正宽; 津田翔
Original assignee: Makita Corp
Current assignee: Makita Corp
Priority date: 2020-02-13
Filing date: 2021-02-08
Publication date: 2021-10-15
Anticipated expiration: 2031-02-08
Also published as: JP7469900B2; DE202020004645U1; JP2021128860A

Abstract

The utility model provides a machine for operation discloses one kind can restrain and carry out the technique of maloperation to the operating portion under the condition that the operating personnel is holding the handle. The work machine may include: a backpack device; a back frame for detachably mounting the backpack device; and a shoulder strap attached to the back frame and worn on the shoulder of the worker. The backpack device may include: a housing; a handle provided in the housing and capable of being held by an operator; and an operation section. The operation unit may be disposed in the housing within a range that can be touched by a hand holding the handle when the worker holds the handle, and may be switched from a 1 st state in which the backpack device cannot be detached from the back frame to a 2 nd state in which the backpack device can be detached from the back frame.

Description

Working machine

Technical Field

The technology disclosed in the present specification relates to a work machine.

Background

Patent document 1 discloses a working machine. The work machine includes a power supply device and a mounting plate. The power supply device is detachably mounted on the mounting plate. The power supply device includes a housing, a handle that can be held by an operator, and an operation unit. The handle is arranged on the shell. The operation unit is switched from a 1 st state in which the power supply device cannot be detached from the attachment plate to a 2 nd state in which the power supply device can be detached from the attachment plate. The operation portion is provided on the handle.

Documents of the prior art

Patent document

Patent document 1: international publication No. 2018/50981

SUMMERY OF THE UTILITY MODEL

Problem to be solved by utility model

In the working machine of patent document 1, when the operator grips the handle, the operator may erroneously operate the operation portion with the hand gripping the handle. Thus, the power supply device is detached from the mounting plate against the operator's will. The present specification discloses a technique capable of suppressing an erroneous operation of an operation unit when an operator grips a handle.

Means for solving the problems

The present specification discloses a working machine. The work machine includes: a backpack device; a back frame for detachably mounting the backpack device; and a shoulder strap attached to the back frame and worn on the shoulder of the worker. The backpack device includes: a housing; a handle provided in the housing and capable of being held by an operator; and an operation section. The operation part is arranged on the shell within a range that the operation part can be touched by a hand holding the handle when the operator holds the handle, and is switched from a 1 st state that the backpack device can not be detached from the back frame to a 2 nd state that the backpack device can be detached from the back frame.

In the above configuration, the operation portion is provided in the housing within a range that can be touched by a hand holding the handle. Since the operation portion is not provided in the handle, it is possible to suppress erroneous operation of the operation portion when the operator grips the handle.

Drawings

Fig. 1 is a perspective view of a working machine 10 according to embodiment 1.

Fig. 2 is a perspective view of the back frame 14, shoulder straps 16 and waist belt 18 of embodiment 1.

Fig. 3 is a perspective view of the backpack device 12 of embodiment 1.

Fig. 4 is a sectional view of the backpack device 12 and the back frame 14 of embodiment 1.

Fig. 5 is a sectional view of the backpack 12 and the vicinity of the handle 42 of the back frame 14 with the handle 42 of embodiment 1 in the 1 st position.

Fig. 6 is a sectional view of the backpack 12 and the vicinity of the handle 42 of the back frame 14 with the handle 42 of the 1 st embodiment in the 2 nd position.

Fig. 7 is a sectional view of the vicinity of the shaft portion 48 of the handle 42 of embodiment 1.

Fig. 8 is a perspective view of the working machine 10 according to embodiment 2.

Fig. 9 is a sectional view of the backpack 12 and the vicinity of the handle 42 of the back frame 14 with the handle 42 of embodiment 2 in the 1 st position.

Description of the reference numerals

10. A working machine; 12. a backpack device; 14. a back frame; 16. shoulder straps; 24. a back plate; 26. a receiving portion; 28. a clamped part; 30. a base; 30a, 1 st base; 30b, 2 nd base; 36. a housing; 36a, a recess; 36b, a step portion; 38. a protrusion portion; 40. a fastening part; 42. a handle; 44. an operation section; 46. a grip portion; 48. a shaft portion; 48a, a planar portion; 56. a pressing part; 58. a claw portion; 60. a force application member; 70. a cover.

Detailed Description

In one or more embodiments, the back frame may include a receiving portion. The housing may include an engaging portion corresponding to the receiving portion, and the engaging portion may be engaged with the receiving portion in a state where the backpack device is mounted to the back frame. When the operation unit is in the 2 nd state, the backpack device may be rotatable about the receiving unit. The posture of the work machine when the worker is standing while carrying the work machine on his/her back may be set to the standing posture, and when the work machine is standing, the operation unit may be engaged with the back frame at a position above the receiving unit, the backpack device may be disposed at a position behind the back frame, and the center of gravity of the backpack device may be located at a position behind the engaging unit, when the operation unit is in the 1 st state.

In the above-described configuration, since the center of gravity of the backpack device is located more rearward than the engaging portion when the working machine is in the upright posture, when the operation portion is switched to the 2 nd state, a moment of gravity acts on the backpack device with the receiving portion as a shaft in a direction in which the backpack device is detached from the back frame. Thus, the backpack device is rotated by its own weight about the receiving portion in a direction in which the backpack device is detached from the back frame. As a result, the backpack device can be easily detached from the back frame.

In one or more embodiments, the handle may be movable between a 1 st position where the handle cannot be held by the operator and a 2 nd position where the handle can be held by the operator. When the working machine is in the upright posture, the handle in the 2 nd position may not be movable relative to the housing in a direction opposite to a direction in which the backpack is detached from the back frame.

When the backpack device is detached from the back frame in a state where the working machine is in an upright posture, the operator grips the handle in the 2 nd position and switches the operation portion to the 2 nd state. The moment of gravity acts on the backpack device in the direction in which the backpack device is separated from the back frame. In the above configuration, even when the backpack device is rotated in a direction to detach the backpack device from the back frame, the handle in the 2 nd position does not move relative to the housing. Therefore, when the backpack device is rotated in a direction to detach from the back frame, the worker can support the backpack device by holding the handle at the 2 nd position. Thus, the worker can support the backpack device and detach the backpack device from the back frame.

In one or more embodiments, the backpack device may further include a protrusion protruding from the housing. The operation portion may be disposed on the housing side of an imaginary plane that is tangent to the handle and the projection at the 1 st position.

In the above-described configuration, when the handle is in the 1 st position, the operation portion is not operated even if the handle and the projection collide against a wall or the like. This can prevent the backpack device from being detached from the back frame against the will of the worker.

In one or more embodiments, the operation portion may be switched from the 1 st state to the 2 nd state by being pushed in.

In the above configuration, the operation portion is switched from the 1 st state to the 2 nd state by a simple operation of pushing the operation portion. This makes it possible to easily detach the backpack from the back frame.

In one or more embodiments, the backpack device may be a backpack power supply device that is connected to an electric working machine having a motor and supplies electric power to the motor of the electric working machine.

The power supply device detachable from the back frame is generally charged in a state of being detached from the back frame. In the above configuration, the operation portion is provided in the housing within a range that can be touched by a hand holding the handle. Since the operation unit is not provided in the handle, it is possible to suppress erroneous operation of the operation unit when the operator grips the handle in order to detach the power supply device from the back frame.

(embodiment 1)

A working machine 10 according to embodiment 1 will be described with reference to fig. 1 to 7. The working machine 10 is a backpack working machine that can be carried on the back by a worker. As shown in fig. 1, the work machine 10 includes a backpack 12, a back frame 14, shoulder straps 16, a waist belt 18, and a connecting wire 20. The backpack 12 is detachably mounted to the back frame 14. In the present embodiment, the backpack device 12 is a backpack power supply device. The backpack device 12 is, for example, a rechargeable battery that can be charged and discharged. The charging power is supplied to the backpack-type device 12 from the outside via an external power supply (not shown) connected to the backpack-type device 12. The backpack device 12 is connected to an electric working machine (not shown) having a motor via a connection wire 20, and supplies discharge power to the motor. The operator can use the electric working machine for a long time using the backpack device 12. In the modification, the backpack device 12 may be a power working machine. The power working machine may be, for example, a hair dryer, a brush cutter, a hedge trimmer, a chain saw, a vacuum cleaner, a sprayer. The power working machine may be a power working machine having an engine or a power working machine having a motor.

As shown in fig. 2, the back frame 14 includes a back plate 24, two receiving portions 26, and an engaged portion 28. When the worker is carrying the work machine 10, the back plate 24 faces the back of the worker. The back plate 24 is provided with shoulder straps 16 and a waist strap 18. The shoulder belt 16 can be worn on the shoulder of the worker. The waist belt 18 can be worn around the waist of the worker. When the shoulder belt 16 and the waist belt 18 are worn on the worker, the work machine 10 is worn on the back of the worker. Hereinafter, the front-rear direction, the left-right direction, and the up-down direction as viewed from the operator in a state where the operator stands upright with the work machine 10 carried thereon will be referred to as the front-rear direction, the left-right direction, and the up-down direction of the work machine 10. The posture of the work machine 10 when the worker stands upright with the work machine 10 on his/her back may be referred to as an upright posture.

Two receiving portions 26 are fixed to the lower end portion of the rear surface of the back plate 24. The two receiving portions 26 are arranged with a space therebetween in the left-right direction. The receiver 26 extends from the rear surface of the back plate 24 toward the rear side, and then extends curvedly toward the upper side.

The engaged portion 28 is fixed to an upper end portion of the rear surface of the back plate 24. The engaged portion 28 is disposed above the receiving portion 26. The engaged portion 28 includes a base portion 30 and a side portion 32. The base 30 includes a 1 st base 30a and a 2 nd base 30 b. The 1 st base 30a extends from the rear surface of the back plate 24 toward the rear side. The 2 nd base 30b extends from the rear end of the 1 st base 30a toward the upper side. The side portions 32 extend upward from the left and right end portions of the 1 st base portion 30a, respectively.

As shown in fig. 1, the backpack 12 includes a housing 36, a projection 38, two engaging portions 40 (see fig. 3), a handle 42, and an operating portion 44. The housing 36 forms the outer shape of the backpack 12. A known battery cell (not shown) is housed inside the case 36. A partial depression of the upper surface of the housing 36. Hereinafter, a recessed portion in the upper surface of the housing 36 is referred to as a recess 36 a. Further, a portion of the housing 36 formed in the recess 36a is referred to as a step portion 36 b. The protrusion 38 protrudes upward from the upper surface of the step 36b of the housing 36. The projection 38 is integrally formed with the housing 36.

As shown in fig. 3, two engaging portions 40 are formed in the front portion of the lower surface of the housing 36. The two engaging portions 40 are arranged with a space therebetween in the left-right direction, and the engaging portions 40 extend downward from the lower surface of the housing 36. The engaging portion 40 tapers away from the lower surface of the housing 36. The engaging portion 40 is provided at a position corresponding to the receiving portion 26 of the housing 36 in the vertical direction and the lateral direction. In a state where the backpack device 12 is attached to the back frame 14, the engaging portion 40 is disposed between the back plate 24 and the receiving portion 26 and engages with the receiving portion 26. In a state where the backpack device 12 is attached to the back frame 14, the engaging portion 40 abuts both the receiving portion 26 and the back plate 24.

As shown in fig. 5 and 6, the handle 42 is provided in the recess 36a of the housing 36. The handle 42 is movable between the 1 st position and the 2 nd position centering on a rotation axis AX1 extending in the left-right direction. As shown in fig. 5, when the handle 42 is at the 1 st position, the handle 42 is tilted in parallel to a plane including the left-right direction and the front-rear direction, and is accommodated in the recess 36 a. When the handle 42 is at the 1 st position, the height position of the handle 42 is substantially equal to the height position of the protrusion 38 in the vertical direction. The grip portion 46 of the handle 42 abuts on the upper surface of the recess 36a of the housing 36. The grip portion 46 is a portion gripped by the operator. Accordingly, when the handle 42 is at the 1 st position, the operator cannot grip the grip portion 46 and cannot carry the backpack 12. As shown in fig. 6, with the handle 42 in the 2 nd position, the handle 42 extends in the up-down direction. The holding portion 46 is disposed outside the recess 36a and does not abut on the upper surface of the recess 36 a. Thus, when the handle 42 is at the 2 nd position, the operator can grip the grip portion 46 and carry the backpack 12.

The handle 42 includes two shaft portions 48 (see fig. 7) in addition to the grip portion 46. The two shaft portions 48 are provided at both ends of the grip portion 46, respectively. Although not shown, the shaft portion 48 is inserted into the housing 36 from the side surface of the recess 36 a. As shown in fig. 7, the shaft portion 48 extends in the left-right direction on the rotation axis AX 1. The handle 42 is enabled to rotate (i.e., move) between the 1 st position and the 2 nd position centering on the rotation axis AX1 by the shaft portion 48 rotating centering on the rotation axis AX 1.

As shown in fig. 7, the shaft portion 48 has a flat surface portion 48 a. The shaft portion 48 has a semicircular shape in cross section, and the flat surface portion 48a is a portion corresponding to the diameter of a circle in the cross section of the shaft portion 48. When the handle 42 is in the 1 st position, the flat surface portion 48a faces upward. When the handle 42 is at the 2 nd position, the flat surface portion 48a abuts against an abutment surface 36c formed on the inner surface of the housing 36. In fig. 7, the position of the shaft portion 48 with the handle 42 in the 2 nd position is illustrated in broken lines. Thus, even when a force toward the front side is applied to the handle 42 in the 2 nd position, the handle 42 cannot rotate about the rotation axis AX 1.

As described above, the backpack 12 includes the operating portion 44. As shown in fig. 5, the operation portion 44 is provided on the step portion 36b of the housing 36. The operating portion 44 includes a pressing portion 56 and a claw portion 58. The pressing portion 56 and the claw portion 58 are integrally formed. A part of the pressing portion 56 is exposed from the step portion 36 b. The pressing portion 56 is a push-in button, and is pushed in by the operator. The pressing portion 56 is biased toward the upper side by a biasing member 60 sandwiched between the housing 36 and the pressing portion 56. The claw portion 58 is bent to extend downward after extending from the pressing portion 56 to the front side. The pawl portion 58 is attached to the step portion 36b so as to be rotatable about a rotation axis AX2 extending in the left-right direction. Thereby, the operation portion 44 can rotate centering on the rotation axis AX 2.

The operation portion 44 is disposed below the upper end surface of the handle 42 at the 1 st position. The operation portion 44 is disposed below the upper surface of the protrusion 38. When a plane tangent to the handle 42 and the projection 38 at the 1 st position is assumed to be an imaginary plane P, the operation portion 44 is disposed on the housing 36 side of the imaginary plane P. The imaginary plane P is illustrated by a broken line in fig. 5.

As shown in fig. 6, when the handle 42 is at the 2 nd position, the operating portion 44 is disposed within a range that can be touched by the hand holding the grip portion 46 when the operator holds the grip portion 46. In the present embodiment, the operation unit 44 is disposed at the 1 st distance from the grip unit 46. The 1 st distance is, for example, 5 cm. The operation portion 44 is disposed in a range where the thumb or index finger of the hand that the worker can hold the grip portion 46 touches the operation portion 44, for example.

The operation portion 44 switches between the 1 st state and the 2 nd state. The operation unit 44 is normally in the 1 st state by being biased by the biasing member 60. As shown in fig. 5, when the operation portion 44 is in the 1 st state, the distal end portion of the claw portion 58 engages with the 2 nd base portion 30b of the engaged portion 28 disposed above the receiving portion 26. Thus, the backpack 12 is fixed to the back frame 14 and cannot be detached from the back frame 14. When pressing part 56 is pushed downward when operation part 44 is in the 1 st state, operation part 44 is switched from the 1 st state to the 2 nd state. Specifically, when the pressing portion 56 is pressed downward, the operation portion 44 rotates about the rotation axis AX 2. Thereby, as shown in fig. 6, the tip portion of the claw portion 58 is detached from the base portion 2 b. The tip of the claw 58 is not engaged with the 2 nd base 30 b. As a result, the backpack 12 can be detached from the back frame 14.

The position of the center of gravity G of the backpack 12 will be described. As shown in fig. 4, the center of gravity G of the backpack 12 is located near the center of the width in the front-rear direction of the backpack 12 and near the center of the width in the up-down direction of the backpack 12. Although not shown, the center of gravity G of the backpack 12 is located near the center of the lateral width of the backpack 12. When the working machine 10 is in the upright posture, the center of gravity G of the backpack device 12 is disposed above the engaging portion 40 and below the operating portion 44. When the working machine 10 is in the upright posture, the center of gravity G of the backpack device 12 is located at a position spaced rearward from the engaging portion 40 and the operating portion 44, that is, at a position spaced from the back frame 14 from the engaging portion 40 and the operating portion 44.

A method of removing the backpack 12 from the back frame 14 is described. When the backpack 12 is detached from the back frame 14, the working machine 10 is placed on the ground (not shown) so as to have the same posture as the upright posture. Further, as described above, when the backpack device 12 is attached to the back frame 14, the engaging portion 40 engages with the receiving portion 26, the operating portion 44 is in the 1 st state, and the claw portion 58 engages with the engaged portion 28. When the operator presses pressing part 56 while gripping part 46 of handle 42 at position 2, operation part 44 is switched from state 1 to state 2. Thereby, the claw portion 58 is no longer engaged with the engaged portion 28. Since the center of gravity G of the backpack device 12 is located at a position that is spaced rearward from the engaging portion 40, a moment of gravity acts on the backpack device 12 about the receiving portion 26 in a direction in which the backpack device 12 is separated from the back frame 14. As a result, the backpack device 12 pivots about the receiving portion 26 in a direction in which the backpack device 12 is detached from the back frame 14 due to its own weight. Further, when the handle 42 is at the 2 nd position, the flat surface portion 48a of the shaft portion 48 abuts against the abutment surface 36c of the housing 36 in the direction opposite to the direction in which the backpack 12 is detached from the back frame 14, and therefore the handle 42 does not move relative to the housing 36. Thus, the backpack 12 is supported by the worker who grips the grip portion 46 of the handle 42 at the 2 nd position. Based on the above results, the backpack 12 is supported by the worker, and is rotated around the receiving portion 26 by its own weight, thereby being detached from the back frame 14.

In the present embodiment, as shown in fig. 1, the working machine 10 includes a backpack 12, a back frame 14 to which the backpack 12 is detachably attached, and a shoulder harness 16 attached to the back frame 14 and worn on the shoulder of the worker. As shown in fig. 5 and 6, the backpack device 12 includes a housing 36, a handle 42 provided on the housing 36 and capable of being held by a worker, and an operation unit 44. The operation unit 44 is disposed in the housing 36 within a range that can be touched by a hand holding the handle 42 when the worker holds the handle 42, and switches from the 1 st state in which the backpack 12 cannot be detached from the back frame 14 to the 2 nd state in which the backpack 12 can be detached from the back frame 14. In this configuration, the operation portion 44 is provided in the housing 36 within a range that can be touched by a hand holding the handle 42. Since the operation unit 44 is not provided on the handle 42, it is possible to suppress erroneous operation of the operation unit 44 when the operator grips the handle 42.

The back frame 14 includes a receiving portion 26. As shown in fig. 4, the housing 36 includes an engaging portion 40, the engaging portion 40 corresponds to the receiving portion 26, and the engaging portion 40 engages with the receiving portion 26 in a state where the backpack device 12 is attached to the back frame 14. When the operating portion 44 is in the 2 nd state, the backpack 12 can be rotated about the receiving portion 26. When the working machine 10 is in the upright posture, the operation unit 44 engages with the back frame 14 at a position above the receiving unit 26 and the backpack device 12 is disposed at a position behind the back frame 14 in the state 1. As shown in fig. 4, the center of gravity G of the backpack 12 is located more rearward than the engaging portion 40. In this configuration, since the center of gravity G of the backpack 12 is located more rearward than the engaging portion 40 when the working machine 10 is in the upright posture, when the operation portion 44 is switched to the 2 nd state, a moment of gravity acts on the backpack 12 about the receiving portion 26 in a direction in which the backpack 12 is detached from the back frame 14. As a result, the backpack device 12 pivots about the receiving portion 26 in a direction in which the backpack device 12 is detached from the back frame 14 due to its own weight. As a result, the backpack 12 can be easily detached from the back frame 14.

As shown in fig. 5 and 6, the handle 42 is movable between a 1 st position where the operator cannot hold the handle and a 2 nd position where the operator can hold the handle. When the working machine 10 is in the upright posture, the handle 42 in the 2 nd position cannot move relative to the housing 36 in the direction opposite to the direction in which the backpack 12 is detached from the back frame 14. When the backpack device 12 is detached from the back frame 14 with the working machine 10 in the upright posture, the worker grips the handle 42 at the 2 nd position and switches the operation unit 44 to the 2 nd state. The moment of gravity acts on the backpack 12 in the direction in which the backpack 12 is detached from the back frame 14. In the above configuration, even when the backpack 12 is rotated in a direction to be detached from the back frame 14, the handle 42 in the 2 nd position does not move relative to the housing 36. Therefore, when the backpack 12 is rotated in a direction to be detached from the back frame 14, the worker can support the backpack 12 by holding the handle 42 at the 2 nd position. Thus, the worker can support the backpack 12 and detach the backpack 12 from the back frame 14.

The backpack 12 also includes a projection 38 that projects from the housing 36. As shown in fig. 5, the operation portion 44 is disposed on the housing 36 side of an imaginary plane P that is tangent to the handle 42 and the projection 38 in the 1 st position. In this configuration, even if the handle 42 and the projection 38 collide against a wall or the like with the handle 42 in the 1 st position, the operation portion 44 is not operated. This can prevent the backpack device 12 from being detached from the back frame 14 against the will of the worker.

As shown in fig. 5 and 6, the operation portion 44 is pushed in to switch from the 1 st state to the 2 nd state. In this configuration, operation unit 44 is switched from state 1 to state 2 by a simple operation of pushing operation unit 44 in. This enables the backpack 12 to be easily detached from the back frame 14.

The backpack device 12 is a backpack power supply device, is connected to an electric working machine having a motor, and supplies electric power to the motor of the electric working machine. The power supply device detachable from the back frame 14 is normally charged in a state detached from the back frame 14. In the above configuration, the operation portion 44 is provided in the housing 36 within a range that can be touched by a hand holding the handle 42. Since the operation unit 44 is not provided in the handle 42, it is possible to suppress erroneous operation of the operation unit 44 when the operator grips the handle 42 in order to detach the power supply device from the back frame 14.

(embodiment 2)

Embodiment 2 is explained with reference to fig. 8 and 9. In embodiment 2, only the points different from embodiment 1 will be described, and the same points as embodiment 1 will be given the same reference numerals and the description thereof will be omitted. As shown in fig. 8, the handle 42 also includes a cover 70. The covering portion 70 is attached to the grip portion 46. As shown in fig. 9, when the handle 42 is at the 1 st position, the height position of the covering portion 70 is substantially the same as the height position of the upper end surface of the grip portion 46 and the height position of the upper surface of the protrusion 38 in the vertical direction. When the handle 42 is in the 1 st position, the covering portion 70 is disposed above the pressing portion 56 and covers the pressing portion 56. Accordingly, when the handle 42 is at the 1 st position, the pressing portion 56 cannot be pushed in. As a result, the backpack 12 cannot be detached from the back frame 14 when the handle 42 is in the 1 st position. Although not shown, when the handle 42 moves from the 1 st position to the 2 nd position, the covering portion 70 rotates together with the grip portion 46. With the handle 42 in the 2 nd position, the covering portion 70 does not cover the upper side of the pressing portion 56. Thereby, when the handle 42 is at the 2 nd position, the pressing portion 56 can be pushed in. As a result, the backpack 12 can be detached from the back frame 14 when the handle 42 is in the 2 nd position.

The specific examples of the present invention have been described in detail, but these are merely examples and do not limit the claims. The techniques described in the claims include various modifications and changes made to the specific examples illustrated above.

The pressing portion 56 of one embodiment may be a button that slides in the left-right direction to switch the operation portion 44 between the 1 st state and the 2 nd state. The pressing portion 56 may be a button that switches the operation portion 44 between the 1 st state and the 2 nd state by hooking a finger and pulling upward.

The handle 42 of one embodiment may be a handle that moves from the 1 st position to the 2 nd position by pulling upward and moves from the 2 nd position to the 1 st position by pushing downward. In this case, the grip portion 46 is a portion extending in the left-right direction, and the shaft portion 48 is a portion extending downward from both end portions of the grip portion 46. When the handle 42 is at the 1 st position, the shaft portion 48 is housed in the housing 36, and the grip portion 46 abuts on the upper surface of the housing 36. When the handle 42 is at the 2 nd position, the shaft portion 48 is disposed outside the housing 36, and the grip portion 46 does not abut against the upper surface of the housing 36. The handle 42 is held at the 2 nd position by the lower end of the shaft portion 48 abutting against the housing 36.

The height position of the operation portion 44 of one embodiment may be substantially equal to the height position of the handle 42 and the height position of the protrusion 38 in the vertical direction. The upper surface of the operation portion 44 may be disposed on the virtual plane P.

The technical elements described in the present specification or drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations recited in the claims at the time of filing. Further, the technology exemplified in the present specification or the drawings can achieve a plurality of objects at the same time, and achieving one of the objects has technical usefulness by itself.

Claims

1. A working machine characterized in that,

the work machine includes:

a backpack device;

a back frame for detachably mounting the backpack device; and

a shoulder strap attached to the back frame for wearing on a shoulder of an operator,

the backpack device includes:

a housing;

a handle provided in the housing and capable of being held by the operator; and

and an operation unit disposed in the housing within a range that the operator can touch the handle with the hand holding the handle, and switching from a 1 st state in which the backpack is not detachable from the back frame to a 2 nd state in which the backpack is detachable from the back frame.

2. The work machine according to claim 1,

the back frame comprises a receiving part which is provided with a bearing part,

the housing includes an engaging portion corresponding to the receiving portion and engaged with the receiving portion in a state where the backpack device is mounted on the back frame,

the backpack device can rotate around the bearing part as a shaft when the operating part is in the 2 nd state,

the posture of the work machine when the worker stands upright with the work machine carried thereon is set to an upright posture, and when the work machine is in the upright posture,

when the operation unit is in the 1 st state, the operation unit engages with the back frame at a position above the receiving unit,

the backpack device is disposed at a position behind the back frame,

the center of gravity of the backpack device is located at a position behind the engaging portion.

3. The work machine according to claim 2,

the handle is movable between a 1 st position where the operator cannot hold the handle and a 2 nd position where the operator can hold the handle,

when the working machine is in the upright posture, the handle in the 2 nd position cannot move relative to the housing in a direction opposite to a direction in which the backpack is detached from the back frame.

4. The work machine according to claim 3,

the backpack device also includes a projection projecting from the housing,

the operating portion is disposed closer to the housing than an imaginary plane that is tangent to the handle and the protrusion in the 1 st position.

5. The working machine according to any one of claims 1 to 4,

the operation unit is switched from the 1 st state to the 2 nd state by being pushed in.

6. The working machine according to any one of claims 1 to 4,

the backpack device is a backpack power supply device, is connected to an electric work machine having a motor, and supplies electric power to the motor of the electric work machine.