Working machine

Abstract

To provide a working machine which can be relatively easily operated by releasing the lock of a trigger lever by one hand.SOLUTION: According to one aspect of the present invention, there is provided a working machine including a working unit configured to cut a work target, and a main body connected to the working unit, wherein the main body includes a main body case and an operation mechanism provided on the main body case, and the operation mechanism includes a trigger lever provided so as to be retractable with respect to the main body case and configured to control actuation of the working unit, the trigger lever includes a trigger lever main body and a lockout element provided on the trigger lever main body so as to be displaceable in a second direction intersecting a first direction of the trigger lever with respect to the main body case, and the lockout element is configured to take a first position where retraction of the trigger lever into the main body case is allowed and a second position where retraction of the trigger lever into the main body case is prevented.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a work machine. [Background technology]

[0002] Handheld drive devices for mowing or cutting vegetation and other objects are subject to increasingly strict safety standards, and are configured to operate by independently operating a lockout lever and a trigger lever. Patent Document 1 discloses a chainsaw equipped with a first operating element (lockout element) provided on the side of the handle held by the operator and a second operating element (lockout lever) provided on the upper side of the handle, and discloses a configuration in which, by operating the first operating element (lockout element) and the second operating element (lockout lever), the drive unit is placed in a state in which it can be driven (lockout state), and the chainsaw can be operated by operating the trigger lever. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] U.S. Patent No. 9,636,792 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the configuration described in Patent Document 1, in order to operate the first operating element (lockout element), it must be operated with a finger (thumb) different from the finger that operates the trigger lever. Therefore, when performing a certain task in which the first operating element (lockout element) is positioned below the direction of gravity (for example, crossing at a position lower than the waist), it is necessary to twist the wrist of the hand holding the grip portion by a certain angle to press in the first operating element (lockout element), which results in poor operability. In view of the above circumstances, the present invention aims to provide a work machine that can be operated relatively easily by unlocking the trigger lever with one hand. [Means for solving the problem]

[0005] According to one aspect of the present invention, there is provided a work machine comprising a working unit configured to cut a work object and a main body unit connected to the working unit, the main body unit having a main body case and an operating mechanism provided on the main body case, the operating mechanism having a trigger lever that is configured to be retractable into the main body case and configured to control the operation of the working unit, the trigger lever having a trigger lever body and a lockout element that is displaceable on the trigger lever body in a second direction that intersects a first direction of the trigger lever relative to the main body case, and the lockout element is configured to take a first position that allows the trigger lever to be immersed in the main body case and a second position that prevents the trigger lever from being immersed in the main body case.

[0006] According to this aspect, the trigger lever can be unlocked with one hand, allowing the working machine to be operated relatively easily. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. 2 is a side view showing the state in which the left cover of the main body is removed. [Figure 5] FIG. 10 is a perspective view of the trigger lever with the lockout element in a second position. [Figure 6] 10A is a diagram showing the rotation direction of the trigger lever body and FIG. 10B is a diagram showing the rotation direction of the lockout element. [Figure 7] 10 is a diagram showing the relationship between the trigger lever and the lockout lever when the lockout element is in a second position. FIG. [Figure 8] 1A and 1B are top views of a trigger lever with (a) the lockout element in the second position and (b) the lockout element in the first position. [Figure 9] 10A and 10B are diagrams illustrating the relationship between the trigger lever and the lockout lever when the lockout element is in a first position. [Figure 10] FIG. 10 is a side view showing another example of the configuration of the trigger lever (with the lockout element in the second position). [Figure 11] FIG. 10 is a rear view showing another example of the configuration of the trigger lever (with the lockout element in the second position). DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment of a chainsaw, which is an example of a work machine, will be described with reference to the accompanying drawings. Various features shown in the following embodiment can be combined with each other. FIG. 1 is a left side view of the chainsaw. FIG. 2 is a top view of the chainsaw. FIG. 3 is a perspective view of the chainsaw. FIG. 4 is a side view showing the state with the left cover of the main body removed. FIG. 5 is a perspective view of the trigger lever with the lockout element in the second position. FIG. 6 is a diagram showing the rotation direction (a) of the trigger lever body and the rotation direction (b) of the lockout element. FIG. 7 is a diagram showing the relationship between the trigger lever and the lockout lever with the lockout element in the second position. FIG. 8 is a top view of the trigger lever ((a) lockout element in the second position, (b) lockout element in the first position). FIG. 9 is a diagram showing the relationship between the trigger lever and the lockout lever with the lockout element in the first position. The directions of each member constituting the chainsaw are defined based on the "up and down," "left and right," and "front and back" shown in the drawings.

[0009] The chainsaw 1 shown in Figure 1 is a small chainsaw known as a top-handle saw. Such a chainsaw 1 is also suitable for climbing trees and pruning them. This chainsaw (working machine) 1 includes a working unit 20 configured to cut an object, and a main body 10 connected to the working unit 20. The main body 10 has a main body case 11, which mounts a motor (prime mover) 30 and a detachable battery 90. The working unit 20 is driven by power supplied from the battery 90 to the motor 30. Note that instead of the motor 30, a small and lightweight internal combustion engine can also be mounted as the prime mover, in which case a fuel tank is mounted instead of the battery 90.

[0010] In the illustrated configuration, the working unit 20 is a chain cutter. The chain cutter includes a guide bar 21 and a saw chain 22. The guide bar 21 is a plate-shaped member extending in the front-rear direction, and the rear end of the guide bar 21 is attached to the front right side of the main body 10 as shown in FIG. A circular saw chain 22 is wound around the outer periphery of the guide bar 21. The rear end of the saw chain 22 is engaged with a drive gear connected to an output shaft 31 of a motor 30. When the motor 30 is driven to rotate a drive gear (not shown), the saw chain 22 rotates along the outer periphery of the guide bar 21 .

[0011] The main body case 11 is a box made of resin. A top handle 40 is integrally formed on the top of the main body case 11. A side handle 50 is attached to the left side of the main body case 11. An operator can perform work by holding the top handle 40 and the side handle 50 with each hand. 1, a motor 30 is housed in the front portion of the main body case 11. The motor 30 is a known electric motor. An output shaft 31 of the motor 30 extends in the left-right direction. In addition to the motor 30, the front part of the main body case 11 also houses a control board (not shown) that controls the drive of the motor 30, and a drive mechanism such as a drive gear (not shown) connected to the output shaft 31 of the motor 30.

[0012] Meanwhile, a battery attachment / detachment section 12 to which the battery 90 can be attached and detached is provided at the rear of the main body case 11. The battery attachment / detachment section 12 is formed on the rear end surface of the main body 10. The battery attachment / detachment section 12 has a holding section 13 that holds the battery 90 and a battery case 14 that houses the lower part of the battery 90. The holding portion 13 is formed at the rear end of the main body case 11 and at a plate-like portion extending upward from the rear end of the main body case 11. As shown in Fig. 3, the holding portion 13 is inclined so that the lower portion is positioned further forward than the upper portion. The holding portion 13 is also provided with an attachment / detachment mechanism 15 for attaching and detaching the battery 90. The attachment / detachment mechanism 15 has a guide member into which the battery 90 is fitted in the vertical direction, and a support member (not shown) that supports the battery 90 from below.

[0013] When attaching the battery 90 to the holder 13, the battery 90 can be attached to the holder 13 by sliding the battery 90 downward relative to the attachment / detachment mechanism 15, as shown in FIG. The battery 90 is a known battery, and as shown in FIG. 3, is configured by housing a secondary battery such as a lithium ion secondary battery in a rectangular parallelepiped case that extends in the vertical direction. 1, the height of the battery 90 is greater than the height of the rear end of the main body case 11. The battery 90 is larger in size than the type of battery that is housed in the main body case 11. The battery 90 has a sufficiently high output and charging capacity suitable for the work.

[0014] When the battery 90 is attached to the holder 13, the longitudinal direction of the battery 90 is aligned with the height direction of the main body case 11. In addition, the upper end of the battery 90 attached to the holder 13 protrudes above the rear end of the top handle 40. 2 and 3, the chainsaw 1 is provided with an ejection mechanism 17 for removing the battery 90 from the battery attachment / detachment section 12. The ejection mechanism 17 has a latch operation section 171 provided on the battery 90 side, and a recess 172 provided on the main body 10 (holding section 13) with which the latch of the latch operation section 171 engages. With the battery 90 attached to the holding section 13, the battery 90 can be pulled up by operating a lever provided on the top of the battery 90 to activate the ejection mechanism 17 (latch operation section 171).

[0015] 3, a metal connection terminal 16 is provided on the rear end surface of the holding portion 13. The connection terminal 16 is electrically connected to the control board and the motor 30 (see FIG. 1). When the connection terminal 16 of the holding portion 13 is connected to the connection terminal of a battery 90, power is supplied from the battery 90 to the control board and the motor 30. 1, the battery case 14 is formed at the lower end of the battery attachment / detachment portion 12. The battery case 14 is a cylindrical portion that houses the lower portion of the battery 90. The lower portion of the battery 90 is inserted into the battery case 14.

[0016] As shown in FIG. 1, the top handle 40 is formed continuously with the top surface of the main body case 11 and extends in the front-rear direction above the main body case 11. The front end 41 of the top handle 40 protrudes upward from the front end of the top surface of the main body case 11. As shown in FIG. 4, a drive switch 60 is provided on the inside of the front end 41 of the top handle 40. This drive switch 60 controls the operation of the working unit 20. Specifically, the drive switch 60 controls the rotation speed of the motor 30 according to the amount of depression of the head, thereby increasing or decreasing the rotation speed of the saw chain 22. Meanwhile, the rear end 42 of the top handle 40 is connected to the upper end of the holding portion 13 of the battery attachment / detachment portion 12. When the battery 90 is attached to the holding portion 13, the upper end of the battery 90 protrudes above the rear end of the top handle 40.

[0017] A grip portion 43 extending in the front-to-rear direction is provided between the front end portion 41 and the rear end portion 42 of the top handle 40. The grip portion 43 is inclined slightly downward from the front end portion 41 to the rear end portion 42 of the top handle 40. The grip portion 43 is a portion that an operator holds when holding the chainsaw 1. The operator's hand is inserted into the space between the grip portion 43 and the top surface of the main body case 11.

[0018] A trigger lever 71 is disposed on the underside of the front end of the grip part 43 as an operating means for increasing or decreasing the rotation speed of the saw chain 22. In other words, the trigger lever 71 is configured to control the operation of the working part 20 via the drive switch 60. The operator can operate the trigger lever 71 while holding the grip part 43. Meanwhile, a lockout lever 72 is provided on the upper surface of the grip portion 43 so as to be displaceable relative to the trigger lever 71. That is, the operation mechanism 70 further has a lockout lever 72. Specifically, the lockout lever 72 is disposed so as to be able to freely protrude and retract from the grip portion 43 (main body case 11). When an operator grips the grip portion 43, the lockout lever 72 is pushed by the palm of the operator and retracts into the grip portion 43. This allows the lockout lever 72 and trigger lever 71 to be operatively connected within the grip portion 43, enabling the trigger lever 71 to be operated for the first time.

[0019] In this embodiment, the operation mechanism 70 is made up of a trigger lever 71 and a lockout lever 72, both of which are provided on the grip portion 43 (main body case 11). By operating this operation mechanism 70, the operation of the working unit 20 can be controlled, i.e., the rotation speed of the saw chain 22 can be increased or decreased. 3, the side handle 50 extends in the front-to-rear direction from the front end to the rear end of the left side surface of the main body case 11. The side handle 50 may be made of resin, or may be formed by bending a lightweight metal pipe. The front end of the side handle 50 is attached to the left side surface of the front end 41 of the top handle 40. The rear end of the side handle 50 is located rearward and below the output shaft 31 of the motor 30, and is attached to the left wall of the battery case 14. The portion of the horizontal handle 50 between its front end and rear end is curved so as to bulge outward relative to the left side surface of the main body case 11 (see FIG. 2).

[0020] 2, in the chainsaw 1 of this embodiment, a thumb rest 45, a power switch 46, and an indicator light 47 are provided on the upper surface of the front end portion 41 of the top handle 40. That is, the main body 10 has the power switch 46 provided on the grip portion 43 (main body case 11). The thumb rest 45, power switch 46, and indicator light 47 are provided in a recessed surface 40a formed on the upper surface of the top handle 40. The recessed surface 40a is slightly recessed from the upper end surface of the grip portion 43 (see FIG. 1). In addition, a protrusion 40b is formed on the recessed surface 40a, which protrudes laterally to the right beyond the right side surface of the grip portion 43. The thumb rest 45 is an area on which the pad of the right thumb rests when the operator holds the grip portion 43 with his or her right hand. The thumb rest 45 is disposed on the axis L in the front-rear direction that passes through the center of the grip portion 43 in the left-right direction.

[0021] The power switch 46 is a push-button switch that, when on, drives the motor 30 (see FIG. 1) and, when off, stops driving the motor 30. The power switch 46 is circular in plan view and protrudes slightly beyond the recessed surface 40a (not shown). The power switch 46 switches between on and off each time it is pressed. When the power switch 46 is pressed to turn on the motor 30 while it is stopped, power is supplied from the battery 90 to the control board (not shown), and the motor 30 enters a standby state for driving. Then, when the trigger lever 71 is pulled with the lockout lever 72 pressed in, power is supplied from the battery 90 to the motor 30 via the control board, and the motor 30 starts to drive. When the power switch 46 is pressed to turn it off while the motor 30 is running, the supply of power to the motor 30 is cut off, and the driving of the motor 30 stops.

[0022] The power switch 46 is provided alongside the right side of the thumb rest 45. The power switch 46 is located on the protruding portion 40b of the recessed surface 40a. In this way, the power switch 46 is located at a position protruding from the top handle 40 on the opposite side (right side) of the side handle 50 (left side). The indicator light 47 is preferably configured as an LED (light-emitting diode) lamp provided on the thumb rest 45. The indicator light 47 indicates the on / off state of the power switch 46. That is, the indicator light 47 is lit when the power switch 46 is on and is extinguished when the power switch 46 is off.

[0023] Next, the configuration of the operation mechanism 70 will be described in detail with reference to FIGS. As described above, the operating mechanism 70 has the trigger lever 71 and the lockout lever 72. The trigger lever 71 is provided so as to be able to protrude and retract relative to the grip portion 43 (main body casing 11). As shown in Figures 6(a) and (b), the trigger lever 71 has a trigger lever main body 711 and a lockout element 712 provided so as to be able to displace on the trigger lever main body 711 in a second direction (left-right direction) that intersects with a first direction (up-down direction) of the trigger lever 71 relative to the main body casing 11. In this embodiment, the trigger lever body 711 is rotatably attached to the main body casing 11. The lockout element 712 is rotatably attached to the trigger lever body 711 with its rear end side (one end side) serving as a rotation center 712o.

[0024] This lockout element 712 is configured to be in a first position (see Figures 8(b) and 9) when its front end (other end) is brought close to the trigger lever body 711, and to be in a second position (see Figures 5 and 8(a)) when it is moved away from the trigger lever body 711. The lockout element 712 is configured to allow the trigger lever 71 to be retracted into the casing 11 at the first position (see FIG. 9). On the other hand, the lockout element 712 is configured to prevent the trigger lever 71 from being retracted into the casing 11 at the second position (see FIGS. 6(a) and 7(a)) by contacting the casing 11. That is, the lockout element 712 is configured to be able to take either the first position or the second position.

[0025] In this way, since the lockout element 712 is provided on the trigger lever body 711, the lockout element 712 can be operated with the same finger as that used to operate the trigger lever 71, improving operability. In addition, a lockout element 712 that allows operation of the trigger lever 71 by operating it in a direction (left / right direction) that intersects with the first direction (up / down direction) of the trigger lever 71 is provided on the side of the trigger lever 71, so that the finger (index finger) that operates the trigger lever 71 can also be used to push it in the left / right direction, improving operability.

[0026] The trigger lever 71 further has a torsion spring (not shown) attached to the rotation shaft 712d of the lockout element 712. This torsion spring biases the front end side (other end side) of the lockout element 712 outward (clockwise in FIG. 7(b)) from the trigger lever body 711 so that the lockout element 712 takes the second position in its natural state (when no external force is applied). As shown in FIG. 4, the trigger lever body 711 has a front part 711a, a rear part 711b, and a rotation shaft 711c provided at the connection between these parts.

[0027] The front part 711a is a part that comes into contact with the head of the drive switch 60 and pushes it downward as the trigger lever body 711 rotates counterclockwise. On the other hand, the rear part 711b is a part that is hooked with, for example, the index finger and / or middle finger to perform the counterclockwise rotation operation of the trigger lever body 711 (immersion operation or trigger operation). 4, a torsion spring 74 is attached to the pivot shaft 711c of the trigger lever body 711. One end 741 of the torsion spring 74 is fixed to the lockout lever 72, and the other end 742 is fixed to the front end of the rear part 711b of the trigger lever body 711.

[0028] The torsion spring 74 biases the lockout lever 72 in a direction (upward) away from the trigger lever 71, and biases the trigger lever main body 711 in a direction (clockwise) protruding from the main body case 11. A locking portion 711d protrudes from the rear end of the trigger lever body 711. This locking portion 711d is locked to the main body case 11, thereby preventing the trigger lever body 711 from unnecessarily protruding (detaching) from the main body case 11. The positions shown in Figures 4, 6(a) and 7 are the initial position (hereinafter referred to as the "initial position") in which the trigger lever 71 (trigger lever main body 711) protrudes from the main body case 11 and before any external force is applied.

[0029] The lockout lever 72 has a long lockout lever main body 721, an arc-shaped leg portion (abutment portion) 722 connected to the lockout lever main body 721 so as to extend toward the trigger lever 71, and a rotation shaft 723 provided at the connection between the lockout lever main body 721 and the leg portion 722. In other words, the lockout lever 72 is attached to the main body case 11 with the connection portion between the lockout lever main body 721 and the leg portion (abutment portion) 722 serving as the rotation center 72o. A fixing portion 721a for fixing one end 741 of the torsion spring 74 is provided on the underside of the rear end portion of the lockout lever main body 721.

[0030] 7(a) shows a state in which the trigger lever body 711 (trigger lever 71) is in the initial position and the lockout lever body 721 (lockout lever 72) protrudes most from the casing 11. In this state, the lockout element 712 is in the second position, as shown in FIG. 7(b). When the lockout element 712 is in the second position, if an external force is applied to the trigger lever body 711 (rear portion 711b) in a direction toward the casing 11 (for example, if the trigger lever body 711 is gripped with the index finger and / or middle finger), the lockout element 712 comes into contact with the casing 11, preventing the trigger lever 71 from retracting into the casing 11. In this state, if an attempt is made to press the lockout lever 72 with the palm of one's hand, the lockout element 712 comes into contact with the lower end of the leg portion 722 (lockout lever 72) at contact point C. This prevents the lockout lever 72 from approaching the trigger lever 71 (that is, the lockout lever 72 from being immersed in the main body case 11).

[0031] Next, when lockout element 712, which is in the second position, is pushed inward with, for example, an index finger and rotated (displaced) to the first position, contact between lockout element 712 and the lower end of leg 722 of lockout lever 72 at contact point C is released. This allows lockout lever 72 to be retracted into casing 11 (i.e., the lockout lever 72 is unlocked from being retracted into casing 11). 8, an opening 71b that opens upward is formed in the rear portion 711b of the trigger lever body 711. The lockout element 712 also has a recess 71a that is recessed downward. Therefore, when the lockout element 712 is in the first position, the opening 71b and the recess 71a overlap in a plan view, as shown in FIGS. 8(b) and 9. In this state, the lockout lever 72 is pressed (pushed down) with the palm of the hand to rotate it so as to retract into the grip portion 43, as shown in FIG.

[0032] At this time, the leg portion 722 of the lockout lever 72 is positioned above the recessed portion 71a and the opening 71b. Therefore, for example, when the trigger lever body 711 is gripped with the index finger and / or middle finger, the trigger lever body 711 can be rotated counterclockwise. As a result, the front portion 711a of the trigger lever body 711 also rotates counterclockwise about the rotation shaft 711c, gradually pushing in the head of the drive switch 60. This allows the rotation speed of the saw chain 22 to increase. 9, a part of the lockout lever 72 (leg portion 722) is inserted into the recess 71a via the opening 71b. The inserted leg portion 722 prevents the front end of the lockout element 712 from rotating (displacing) outward, and the lockout element 712 is held in the first position. With this configuration, when the leg portion 722 is inserted into the recess 71a, there is no need to continue pressing the lockout element 712 with, for example, the index finger, resulting in excellent operability.

[0033] Finally, when the trigger lever 71 and the lockout lever 72 are brought to the closest position, the front part 711a of the trigger lever body 711 presses the head of the drive switch 60 in the most depressed position, and the rotation speed of the saw chain 22 reaches its maximum. Therefore, the rotation speed of the saw chain 22 can be adjusted by changing the degree of gripping force (external force applied) on the trigger lever body 711. With this configuration, it is necessary to release the state (locked state) in which the trigger lever body 711 is prevented from rotating relative to the main body case 11 by the lockout lever 72 and lockout element 712 with two actions, so that unintentional rotation of the saw chain 22 can be more reliably prevented.

[0034] In this embodiment, as shown in Fig. 4, the power switch 46 and the pivot shaft (connection portion) 723 between the lockout lever main body 721 and the leg portion (contact portion) 722 are arranged adjacent to each other. Note that the power switch 46 itself is omitted from Fig. 4. With this configuration, the length of the main body 10 in the front-to-rear direction can be designed to be shorter, which contributes to the miniaturization of the chainsaw 1. It also makes it easier for the operator to turn the power switch 46 on and off with the thumb of the hand holding the grip portion 43. Here, the trigger lever 71 is not limited to the above configuration, but may also be configured as follows. Fig. 10 is a side view (with the lockout element in the second position) showing another example of the configuration of the trigger lever. Fig. 11 is a rear view (with the lockout element in the second position) showing another example of the configuration of the trigger lever. 10, a lockout element 712 is provided so as to be slidable in the front-rear direction relative to a trigger lever body 711. The trigger lever 71 shown in FIG. 11 is provided so as to be rotatable in the front-rear direction relative to the trigger lever body 711, with the lockout element 712 being the center of rotation.

[0035] In the main body 10 as described above, the main body case 11, trigger lever 71, lockout lever 72, and top handle 40 are preferably made of a relatively hard resin material in order to ensure their mechanical strength. Examples of such relatively hard resin materials include ABS resin, AS resin, polyamide (nylon), acrylic resin, polycarbonate, polyethylene terephthalate, etc. These resins may be used alone or in combination of two or more.

[0036] Furthermore, with the main body 10, the grip portion 43 can be held with one hand, and for example, the power switch 46 can be turned on / off with the thumb. The lockout lever 72 can be pressed in with the palm of the hand, and the trigger lever main body 711 can be pulled up with the index finger and / or middle finger while the lockout element 712 is operated with the index finger. In other words, with such a main body 10, the power switch 46 can be turned on / off and the three members can be rotated (displaced) with one hand, providing excellent operability.

[0037] The displacement of the lockout lever 72 relative to the trigger lever 71 is not limited to rotation, but may be sliding in the vertical direction, or the like. Furthermore, the working unit for cutting the object may be a cutter assembly in which a pair of cutters are slidably stacked, a disk having a pruning blade on its outer periphery, or the like. Furthermore, it may be provided in the following aspects.

[0038] (1) A work machine comprising a working unit configured to cut a work object and a main body connected to the working unit, the main body having a main body case and an operating mechanism provided on the main body case, the operating mechanism having a trigger lever that is configured to be retractable into the main body case and configured to control the operation of the working unit, the trigger lever having a trigger lever body and a lockout element that is displaceable on the trigger lever body in a second direction that intersects a first direction of the trigger lever relative to the main body case, the lockout element being configured to take a first position that allows the trigger lever to be immersed in the main body case and a second position that prevents the trigger lever from being immersed in the main body case.

[0039] (2) In the work machine described in (1) above, the lockout element is configured to prevent the trigger lever from being immersed in the main body case by contacting the main body case in the second position.

[0040] (3) In the work machine described in (1) or (2) above, the lockout element is attached to the trigger lever body with one end side as the center of rotation, and is configured to be in the first position when the other end side is brought close to the trigger lever body, and to be in the second position when the other end side is moved away from the trigger lever body.

[0041] (4) The work machine according to any one of (1) to (3) above, wherein the trigger lever body is attached to the body case so as to be rotatable.

[0042] (5) In a work machine described in any one of (1) to (4) above, the operating mechanism further has a lockout lever that is displaceable relative to the trigger lever, and in the second position, the lockout element comes into contact with the main body case, thereby preventing the trigger lever from retracting into the main body case, and the lockout element comes into contact with the lockout lever, thereby preventing the lockout lever from approaching the trigger lever.

[0043] (6) In the work machine described in (5) above, the lockout element has a recess, and in the first position, a part of the lockout lever is inserted into the recess, thereby holding the lockout element in the first position.

[0044] (7) A work machine according to (5) or (6) above, wherein the lockout lever has a long lockout lever body and an abutment portion connected to the lockout lever body so as to extend toward the trigger lever.

[0045] (8) In the work machine described in (7) above, the lockout lever is attached to the main body case with the connection part between the lockout lever body and the abutment part as the center of rotation.

[0046] (9) In the work machine described in (8) above, the main body further has a power switch provided in the main body case, and the power switch and the connection portion are arranged adjacent to each other. Of course, this is not the case.

[0047] Finally, while various embodiments of the present invention have been described, these are presented by way of example only and are not intended to limit the scope of the invention. The novel embodiments may be embodied in various other forms, and various omissions, substitutions, and modifications may be made without departing from the spirit of the invention. Such embodiments and modifications are intended to be included within the scope and spirit of the invention, as well as within the scope of the inventions and their equivalents as defined in the accompanying claims. [Explanation of symbols]

[0048] 1: Chainsaw 10: Main body 11: Main unit case 111: Containment space 12: Battery attachment / detachment section 13: Holding part 14: Battery case 15: Detachable mechanism 16: Connection terminal 17: Eject mechanism 171: Latch operation part 172: Recess 20: Working section 21: Guide bar 22: Saw chain 30: Motor 31: Output shaft 40: Top handle 40a: recessed surface 40b:Protrusion 41: Front end 42: Rear end 43:Gripping part 45: Thumb rest 46: Power switch 47: Indicator light 50: Horizontal handle 60: Drive switch 70: Operation mechanism 71: Trigger lever 71a: recess 71b: Opening 71o: Center of rotation 711: Trigger lever body 711a:Anterior part 711b: Posterior part 711c: Rotating shaft 711d: Locking part 712: Lockout element 712d: Rotating shaft 712o: Center of rotation 72: Lockout lever 72o: Center of rotation 721: Lockout lever body 721a: Fixed part 722: Leg (contact part) 723: Rotating shaft 74: Torsion spring 741:One end 742: Other end 90: Battery C: Contact point L: Axis line

Claims

1. A work machine, A cutting tool includes a working unit configured to cut a work object, and a main body connected to the working unit, the main body portion has a main body case and an operation mechanism provided in the main body case, the operating mechanism has a trigger lever that is provided so as to be retractable into the main body case and that is configured to control the operation of the working unit, the trigger lever has a trigger lever body and a lockout element provided on the trigger lever body so as to be displaceable in a second direction intersecting a first direction of the trigger lever relative to the main body case, The lockout element is configured to take a first position that allows the trigger lever to be immersed in the main body case and a second position that prevents the trigger lever from being immersed in the main body case.

2. The work machine according to claim 1, The lockout element is configured to contact the main body case in the second position to prevent the trigger lever from being retracted into the main body case.

3. The work machine according to claim 1, The lockout element is attached to the trigger lever body with one end side as the center of rotation, and is configured to be in the first position when the other end side is brought close to the trigger lever body, and to be in the second position when the other end side is moved away from the trigger lever body.

4. The work machine according to claim 1, The trigger lever body is attached to the main body case so as to be rotatable relative to the main body case.

5. The work machine according to claim 1, The operating mechanism further includes a lockout lever that is displaceable relative to the trigger lever, In the second position, the lockout element comes into contact with the main body case, thereby preventing the trigger lever from retracting into the main body case, and the lockout element comes into contact with the lockout lever, thereby preventing the lockout lever from approaching the trigger lever.

6. The work machine according to claim 5, the lockout element has a recess; A work machine configured such that, in the first position, a portion of the lockout lever is inserted into the recess, thereby holding the lockout element in the first position.

7. The work machine according to claim 5, The lockout lever has a long lockout lever body and an abutment portion connected to the lockout lever body so as to extend toward the trigger lever.

8. The work machine according to claim 7, The lockout lever is attached to the main body case with the connection between the lockout lever body and the abutment portion as the center of rotation.

9. The work machine according to claim 8, The main body further includes a power switch provided on the main body case, The power switch and the connection portion are disposed adjacent to each other.

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