Work machine

Abstract

The invention provides a working machine capable of repeatedly restoring the position and angle of a handle to the original state. According to one embodiment of the present invention, a working machine is provided with a working part, a main body part, a connection part, and an operation part. The working part is connected to the main body part through a connecting part, the operation part is provided with a handle and a fixing mechanism for fixing the handle to the connecting part, and the handle is provided with a mark indicating the relative position and angle relative to the connecting part.

Description

TECHNICAL FIELD The present application relates to a work machine. BACKGROUND Patent Document 1 and Patent Document 2 disclose a portable work machine provided with a U-shaped handle having a grip portion provided on both left and right sides. In the portable work machine described in Patent Document 2, a structure is disclosed in which the U-shaped handle is fastened and fixed to the main body lever. According to such a structure, the operator can fix the handle at a desired position. PRIOR ART DOCUMENTS PATENT DOCUMENTS Patent Document 1: Japanese Patent Publication No. 2015-050985 Patent Document 2: Japanese Utility Model Publication Hei 1-32511 SUMMARY PROBLEMS TO BE SOLVED BY THE INVENTION However, in the portable work machines disclosed in Patent Document 1 and Patent Document 2, when the position or angle of the handle is changed for storage, carrying, or the like, it is difficult to restore the handle to the original state again. In view of the above, the present application provides a work machine capable of repeatedly restoring the position and angle of the handle to the original state. MEANS FOR SOLVING PROBLEMS According to one embodiment of the present application, there is provided a work machine including a work portion, a main body portion, a connecting portion, and an operation portion; the work portion is connected to the main body portion via the connecting portion, the operation portion has a handle and a fixing mechanism that fixes the handle to the connecting portion, and the handle has a mark that indicates a relative position and angle with respect to the connecting portion. According to this embodiment, the position and angle of the handle can be repeatedly restored to the original state. BRIEF DESCRIPTION OF DRAWINGS Figure 1 is a perspective view of the lawn mower as viewed from the upper side. Figure 2 is an overall view of the lawn mower as viewed from the upper side. Figure 3 is a perspective view of the fixing mechanism as viewed from the upper side. Figure 4 is an enlarged perspective view of the handle shown in the area A of Figure 1 is an enlarged perspective view of the handle shown in the area A ofFigure 5 This is a diagram used to illustrate the markings on the handle. Figure 6 It is a three-dimensional view of the lawnmower viewed from above, showing the adjustment direction of the handle's position and angle. Figures 7A-7C It is an enlarged three-dimensional diagram used to illustrate the position adjustment of the handle and to show the positional relationship between the fixing mechanism and the handle. Figures 8A-8C It is an enlarged three-dimensional diagram used to illustrate the angle adjustment of the handle and to show the positional relationship between the fixing mechanism and the handle. Figure 9 This is a 3D view of a lawnmower with the handle retracted, viewed from above. Detailed Implementation Hereinafter, examples of embodiments of the present invention will be described with reference to the accompanying drawings. The various features shown in the following embodiments can be combined with each other. 1. Overall Structure In the first chapter, the work machine 1 according to one embodiment will be described. Figure 1 This is a three-dimensional view of the lawnmower from above. Figure 2 This is an overall view of the lawnmower from above. Figure 3 This is a three-dimensional view of the fixing mechanism viewed from above. Figure 4 Viewed from above Figure 1 An enlarged perspective view of the handle is shown in region A. Figure 5 This is a diagram used to illustrate the markings on the handle. In the following description, based on Figures 1-5 ( Figures 6-9 Similarly, the directions of the lawnmower 10 and its constituent parts are defined by the terms "up", "down", "left", "right", "front" and "back" shown in the diagram. Furthermore, in the following description, "upper" can also be referred to as "upper side" or "above", and "lower" can also be referred to as "lower side" or "below". In addition, the direction formed by up and down is called "up and down" or "up and down direction". These also apply to "left", "right", "front" and "back". (Worker 1) Figure 1 The machine shown is a portable lawnmower 10. The mower 10 as the work machine 1 is provided with a work unit 2, a main body unit 3, a connecting unit 4, and an operation unit 5. The mower 10 is a shoulder strap type mower that uses an engine as a power source. Note that the work machine 1 is described taking the mower 10 as an example, but can be applied to various machines that connect the work unit 2 and the main body unit 3 via the connecting unit 4. As other machines, for example, a blower, a trimmer, a brush cutter, a cultivator, a sweeper, or a hedge trimmer can be listed. The power source of the work machine 1 is not limited to an engine, but a motor or the like can also be used. Also, the work machine 1 is not limited to a shoulder strap type, but can be a hand-held type, a backpack type, or the like. (Work Unit 2) As shown in FIG. 1, the work unit 2 is connected to the connecting unit 4 in front of the main body unit 3 and the connecting unit 4. Figure 1 The work unit 2 is provided with a rotating unit 21, a nylon rope 22, and a cover 23. The work unit 2 is provided with a rotating unit 21, a nylon rope 22, and a cover 23. The rotating unit 21 has a substantially disc-like shape and is configured to rotate by the rotational power of a power source 32. The nylon rope 22 has a linear shape. The nylon rope 22 has its base end side wound along the circumferential direction of the rotating unit 21 and fixed inside the rotating unit 21, and has its tip end side protruding outward from the rotating unit 21 to extend outward in the peripheral direction of the rotating unit 21. The nylon rope 22 is configured to cut grass or the like when the nylon rope 22 contacts the grass or the like by high-speed rotation together with the rotating unit 21. The cover 23 has a fan-like shape and is connected to the connecting unit 4 behind the nylon rope 22. The cover 23 is configured to prevent the pieces of the grass or the like cut by the nylon rope 22 from flying directly toward the operator. Note that although the case where the work unit 2 uses the nylon rope 22 is described as an example, it is not limited thereto, and for example, a resin rope other than the nylon rope, a metal blade (saw blade, branch cutter, or the like), a reciprocating blade, or the like can be used. (Main Body Unit 3) As shown in FIG. 1, the work unit 2 is connected to the connecting unit 4 in front of the main body unit 3 and the connecting unit 4. Figure 1 The work unit 2 is provided with a rotating unit 21, a nylon rope 22, and a cover 23. The main body unit 3 is provided with a housing 31 and a power source 32. The housing 31 is a box-like shape and is connected to the connecting unit 4 on the rear side of the connecting unit 4. The housing 31 has a space inside thereof, and the power source 32 is housed in the space. The power source 32 is configured to generate rotational power. The rotational power generated by the power source 32 is transmitted to the rotating portion 21 of the work portion 2 via a drive transmission shaft 42 inside the connection portion 4. Specifically, the power source 32 is a publicly known engine, and is housed in the inside space of the housing 31. The engine is preferably set to an arbitrary specification (displacement, fuel tank size, etc.) according to the weight, workability, work duration, etc. of the mower 10. Note that the details of the drive transmission shaft 42 of the connection portion 4 will be described later. ( Connection portion 4 ) As shown in Figure 1 , the main portion 3 and the work portion 2 are connected via the connection portion 4. The connection portion 4 is configured so that a shaft 4a thereof extends in the front-rear direction, and has an operation lever 41 and the drive transmission shaft 42. The operation lever 41 is a tubular member extending in the front-rear direction, and the drive transmission shaft 42 is inserted through the inside thereof. The drive transmission shaft 42 connects the rotating portion 21 of the work portion 2 and the power source 32, and is configured to be able to transmit power from the power source 32 to the work portion 2. ( Operation portion 5 ) As shown in Figure 1 , the operation portion 5 is installed in the connection portion 4. The operation portion 5 has a handle 51, a fixing mechanism 52 that fixes the handle 51 to the connection portion 4, a belt installation portion 53, and a shroud 54. As shown in Figure 1 , the handle 51 has a substantially U-shaped shape, and is configured to be able to be fixed to the fixing mechanism 52. The handle 51 is fixed to the rear side of the connection portion 4 by the fixing mechanism 52. In addition, the handle 51 is a portion that is held and operated by the hand of the operator, and has an extension portion 511, a grip portion 512, a trigger lever 513, a lock lever 514, and a main switch 515. The extension portion 511 extends in a first direction that crosses the shaft 4a of the connection portion 4 extending in the front-rear direction, with the fixing mechanism 52 as a center. In other words, the first direction is a direction that crosses the connection portion 4, and is a direction that crosses the front-rear direction. As shown in Figure 3 and Figure 4As shown, specifically, the extension portion 511 has an axis 511a extending in the left-right direction as the first direction, and is connected to the fixing mechanism 52 so that the axis 511a substantially coincides with an axis 521a of the length direction of the shaft hole 521 provided to the fixing mechanism 52. That is, the handle 51 is configured so that the axis 511a thereof extends in the left-right direction (an example of the first direction). Further, the extension portion 511 is bent so as to be easily held by the operator. Specifically, the extension portion 511 extending to the left side from the fixing mechanism 52 extends substantially horizontally to the left direction for a predetermined length, is bent and extends obliquely upward, and then extends substantially horizontally to the left direction and sharply bends to extend upward. On the other hand, the extension portion 511 extending to the right side from the fixing mechanism 52 extends substantially horizontally to the right direction for a predetermined length and is bent to extend upward. Further, as the holding portion 512 directly held by the operator, the extension portion 511 has a holding portion 512a at the tip portion on the left side and a holding portion 512b at the tip portion on the right side. The holding portion 512b is larger than the holding portion 512a, and a trigger lever 513, a lock lever 514, and a main switch 515 are provided to the holding portion 512b. The trigger lever 513 is disposed on the front side of the holding portion 512b, and is configured as an operation means for increasing and decreasing the rotation speed of the rotating portion 21 and the nylon cord 22. That is, the trigger lever 513 is configured to control the operation of the work portion 2 via a drive switch (not shown). The operator can operate the trigger lever 513 while holding the holding portion 512b. The lock lever 514 is disposed on the rear side of the holding portion 512b, and is configured to be displaceable with respect to the trigger lever 513. Specifically, the lock lever 514 is disposed so as to be freely inserted and withdrawn with respect to the holding portion 512b. The operator, by holding the holding portion 512b, causes the lock lever 514 pressed by the palm to be withdrawn into the holding portion 512b. In this way, the lock lever 514 and the trigger lever 513 are operatively connected in the holding portion 512b, so that the trigger lever 513 can be operated only after the lock lever 514 is first operated. The main switch 515 is disposed on the left side of the holding portion 512b, and is configured to be switchable between on and off of the power source 32. Specifically, when the main switch 515 is turned on, the engine, which is the power source 32, is configured to be startable and to maintain the state of the started engine. In addition, when the main switch 515 is closed, it is configured to stop the started engine or prevent the engine from starting. And, as Figure 2 As shown, the handle 51 has a mark M on the upper side of the extension 511 of the handle 51 and near the position of the mounting and fixing mechanism 52. Thus, the pointer P of the fixed mechanism 52 indicates any position of the mark M. Then, by indicating any position of the marker M via the pointer P, the relative position and angle of the handle 51 with respect to the connecting part 4 are indicated via the fixing mechanism 52. In other words, the handle 51 has a mark M indicating its relative position and angle with respect to the connecting part 4 via the fixing mechanism 52. In this way, the position and angle of the handle 51 relative to the connecting part 4 are indicated by the mark M. When the position or angle of the handle 51 is changed for storage, transportation, etc., the position and angle of the handle 51 can be repeatedly restored to the original state. That is, by positioning the handle 51 relative to the connecting part 4, the relative position and angle of the handle 51 relative to the fixing mechanism 52 can be determined. Furthermore, this method allows the lawnmower 10 to be precisely adjusted to the position and angle of the easy-to-use handle 51 in a short time, according to the operator's preferences. In other words, for example, when restoring the handle to the desired position and angle, reproducibility is difficult for a handle with a roughly uniform outer circumference that is not marked M. In contrast, the handle 51 with the mark M can be accurately restored to its original state in a short time. As a result, the operator is always able to use the lawnmower 10 with the handle 51 in a position and angle that is easy to operate. Note that details about the pointer P of the fixed mechanism 52 will be described later. In addition, such as Figure 2 As shown, specifically, the mark M is positioned to the left of the fixing mechanism 52. That is, regarding the handle 51, when viewed from the rear, there is a mark M on the left side of the shaft 4a relative to the connecting part 4. In this way, the operator's position relative to the lawnmower 10 when adjusting the position and angle of the handle 51 while the lawnmower 10 is placed on the ground is on the same side as the operator's position relative to the lawnmower 10 when the lawnmower 10 is lifted. As a result, after adjusting the position and angle of the handle 51, the operator can lift the mower 10 without changing the position relative to the mower 10, and thus can smoothly start work. In addition, as shown in Figure 5 , the marks M preferably include a plurality of position marks (unit marks) MP1 to MP5 and a plurality of angle marks (unit marks) MA1 to MA5. At this time, the position marks MP1 to MP5 are configured to indicate the position in the left-right direction (an example of the first direction) of the handle 51 with respect to the connecting portion 4. In addition, the angle marks MA1 to MA5 are configured to indicate the position in the rotation direction centered on the shaft 511a with respect to the connecting portion 4. According to this manner, the position and angle of the handle 51 can be indicated by the position marks MP1 to MP5 (position marks MP) and the angle marks MA1 to MA5 (angle marks MA), respectively. As a result, the mower 10 can be adjusted to the position and angle of the handle 51 that are easy to use more easily and in a shorter time. Hereinafter, the position marks MP1 to MP5 will be first explained in detail, and then the angle marks MA1 to MA5 will be explained in detail. The position marks MP1 to MP5 are arranged in the left-right direction of the handle 51 to indicate the position of the handle 51 in the left-right direction (see Figure 5 ). Specifically, the position mark MP1, the position mark MP2, the position mark MP3, the position mark MP4, and the position mark MP5 are arranged in this order from the left side of the handle 51. Note that the number of position marks MP is not limited to five, but it is preferable to provide three to eight positions. At this time, the position marks MP are provided at appropriate intervals that the operator can recognize, and thus the reproducibility is improved. Note that when applied to a smaller mower or the like, the number of position marks MP can be less than three, and the left and right end portions of the angle marks MA described later can be used instead as two position marks MP. At least a part of the position marks MP1 to MP5 is preferably configured to indicate the variable position (sliding) direction of the handle 51. As shown in Figure 5 , specifically, the position mark MP1 located at the leftmost side of the handle 51 is configured to indicate the right direction from the position of the position mark MP1 as the variable position direction of the handle 51. In detail, the position marker MP1 indicates the variable position direction of the handle 51 as the right direction from the position of the position marker MP1 by the tip of the arrow pointing in the right direction. In addition, the position marker MP1 is preferably configured to indicate the left side boundary recommended as the fixed position of the handle 51. According to this manner, the operator can refer to the position marker MP1 as the recommended range considering the left-right balance of the mower 10. In addition, with respect to the position marker MP5 located at the rightmost side of the handle 51, as the variable position direction of the handle 51, it is configured to indicate the left direction from the position of the position marker MP5. In detail, the position marker MP5 indicates the variable position direction of the handle 51 as the left direction from the position of the position marker MP5 by the tip of the arrow pointing in the left direction. In addition, the position marker MP5 is preferably configured to indicate the right side boundary recommended as the fixed position of the handle 51. According to this manner, the operator can refer to the position marker MP5 as the recommended range considering the left-right balance of the mower 10. Further, the position marker MP3 located between the position marker MP1 and the position marker MP5 is configured to indicate the left-right direction as the variable position direction of the handle 51 from the position of the position marker MP3. Specifically, the position marker MP3 indicated by the shape in which the right direction of the tip of the arrow and the left direction of the tip of the arrow are combined, that is, a rhombus, indicates that the variable position direction of the handle 51 is possible in both the right direction and the left direction from the position of the position marker MP3. Note that the position markers MP2 and MP4 located between each of the position marker MP1, the position marker MP3, and the position marker MP5 are configured to indicate only the positions thereof without indicating the directions because they are intermediate positions. As described above, the marker M includes a plurality of position markers (unit markers) MP1 to MP5. Further, at least a part of the plurality of position markers MP1 to MP5 is configured to indicate the variable position direction of the handle 51. According to this manner, the variable position direction of the handle 51 is indicated by the arrangement and shape of the plurality of position markers MP1 to MP5, and thus it is possible to easily grasp the adjustment direction or the adjustment amount. As a result, it is possible to adjust the position of the handle 51 more easily and in a shorter time. In addition, the position markers MP1 to MP5 are arranged with a predetermined interval G1 therebetween. Figure 5The predetermined interval G1 shown in FIG. 1 is 8.5 mm. In other words, the plurality of position marks MP1 to MP5 are arranged at the predetermined interval G1. Further, the predetermined interval G1 is preferably, for example, 3 to 20 mm, more preferably 5 to 15 mm, and further preferably 7 to 10 mm. According to this manner, by arranging the plurality of position marks MP1 to MP5 at the predetermined interval G1, the position of the main body portion 3 with respect to the handle 51 can be finely adjusted according to the predetermined interval G1. As a result, the position of the handle 51 can be adjusted more easily and in a shorter time. On the other hand, the angle marks MA1 to MA5 are arranged on the upper side of the handle 51 in the axial direction (circumferential direction) of the handle to indicate the position in the rotation direction centered on the shaft 511a of the handle 51 (see FIG. 1). Figure 5 ). Specifically, the angle mark MA1, the angle mark MA2, the angle mark MA3, the angle mark MA4, and the angle mark MA5 are arranged in this order from the front in the circumferential direction of the handle 51. Note that the number of angle marks MA is not limited to five, but three to eight or so are preferably provided. At this time, the angle marks MA are provided at appropriate intervals, thereby improving reproducibility. The interval of the angle marks MA is determined according to the outer diameter of the tube of the handle 51, the position and area where the operator can easily observe, and the like. Note that the line width of the angle marks MA can be uniform, but the visibility of the standard angle can be improved by thickening only the central angle mark MA. Specifically, Figure 5 In the angle marks MA shown in FIG. 1, the angle mark MA3 located in the central portion is indicated by a line width of 0.75 mm, and the other angle marks MA are indicated by a line width of 0.30 mm. According to this manner, the angle mark MA3, which is the reference angle, can be more clearly indicated. Note that the angle mark MA1 and the angle mark MA5 among the angle marks MA1 to MA5 can also be configured to indicate the variable position (rotation) direction of the handle 51. Specifically, the angle mark MA1 can be configured to indicate the rear direction from the position of the angle mark MA1, and the angle mark MA5 can be configured to indicate the front direction from the position of the angle mark MA5. That is, the angle mark MA1 and the angle mark MA5 are preferably configured to indicate the boundaries of the rear direction and the front direction, respectively, which are recommended as the fixed position of the handle 51. According to this manner, the operator can refer to the angle marks MA1 and MA5 as a recommended range that takes into account the balance of the mower 10 in the front-rear direction. As described above, the marks M include a plurality of angle marks (unit marks) MA1 to MA5. Also, at least a part of the plurality of angle marks MA1 to MA5 is configured to indicate the direction of the displacement of the handle 51. According to this manner, the direction of the displacement of the handle 51 is indicated by the arrangement and shape of the plurality of angle marks MA1 to MA5, so that the adjustment direction or adjustment amount can be easily grasped. As a result, in order to improve the operability of the mower 10, the position of the handle 51 can be adjusted more easily and in a shorter time. In addition, the angle marks MA1 to MA5 are arranged with a predetermined interval G2 from each other. In other words, the plurality of angle marks MA1 to MA5 are arranged with the predetermined interval G2. The predetermined interval G2 is configured to correspond to the predetermined angle θ when the extension portion 511 is rotated about the shaft 511a, and is defined in accordance with the outer diameter of the extension portion 511 on which the angle marks MA are marked. In the predetermined interval G2 shown in Figure 5 The predetermined angle θ is 10° in the predetermined interval G2 shown in In addition, the predetermined angle θ is preferably, for example, 3° to 20°, more preferably 5° to 15°, and further preferably 7° to 12°. According to this manner, by arranging the plurality of angle marks MA1 to MA5 with the predetermined interval G2, the angle of the main body portion 3 with respect to the handle 51 can be finely adjusted with the predetermined angle θ as a reference. If the range of the angle marks MA described above is adopted, the reproducibility of the predetermined position is improved, and the angle of the handle 51 can be adjusted more easily and in a shorter time. Also, the marks M preferably include a standard mark MS. As shown in Figure 5 Specifically, it is preferable that the standard mark MS be indicated at a position where the position mark MP3 and the angle mark MA3 intersect. Thus, the standard mark MS indicates a substantially central position of the position marks MP and a substantially central position of the angle marks MA. That is, the standard mark MS is configured to indicate a standard position of the main body portion 3 with respect to the handle 51. According to this manner, the standard position and angle of the handle 51 can be seen through the marks M. As a result, the mower 10 can be adjusted to a position and angle of the handle 51 that is easy to use with the standard position and angle as a reference. Note that the standard position and angle are preferably specified based on an adult conceived as the operator. like Figure 1 As shown, the fixing mechanism 52 is mounted on the connecting part 4 via the protective cover 54 and is positioned between the working part 2 and the main body part 3. Note that the fixing mechanism 52 can also be installed directly on the connecting part 4 without going through the protective cover 54. like Figure 3 As shown, the fixing mechanism 52 is composed of an upper part 52a and a lower part 52b that are separated from each other in the vertical direction. The upper component 52a and the lower component 52b are secured by fastening component 522 and two screws 523. Specifically, the shaft portion of the fastening component 522 is inserted into the through holes of the upper component 52a and the lower component 52b, and screwed into the screw hole of the cover 54. Thus, the fixing mechanism 52 is fixed to the connecting part 4 via the protective cover 54. In addition, the shaft of screw 523 is inserted into the through hole of the upper component 52a and screwed into the screw hole of the lower component 52b. In addition, in the fixing mechanism 52, the shaft hole 521 is formed by combining the upper part 52a and the lower part 52b. The shaft hole 521 is formed so that the handle 51 can be inserted along its shaft 521a. The shaft hole 521 is configured such that its inner diameter can be adjusted by adjusting the tightness of the fastening component 522 and the two screws 523. Thus, the fixing mechanism 52 is configured to fix the handle 51 inserted into the shaft hole 521 when the inner diameter of the shaft hole 521 is small (reduced diameter state), and to release the fixation of the handle 51 when the inner diameter of the shaft hole 521 is large (expanded diameter state). Furthermore, the fixing mechanism 52 is configured such that the handle 51 can move within the shaft hole 521 when the handle 51 is released from its fixed state. Furthermore, the fixing mechanism 52 is configured such that, with the two screws 523 fastened in the predetermined position, the handle 51 can be released by loosening the fastening member 522, while the handle 51 can be fixed by tightening the fastening member 522. In addition, the fastening component 522 is configured to be tightened or loosened without the need for tools, by simply holding its upper part and rotating it. Furthermore, the fixing mechanism 52 has a pointer P near the shaft hole 521. likeFigure 3 As shown, specifically, the fixing mechanism 52 is provided with the pointer P in the left side surface of the upper side member 52a, above the shaft 521a of the shaft hole 521. Also, the pointer P is configured to protrude in the left direction from the left side surface of the upper side member 52a. According to this manner, even if the operator observes the pointer P from an angle close to directly above, the pointer P can be easily seen. As a result, the alignment work of the angle mark MA and the pointer P can be easily performed. The belt mounting portion 53 is mounted to the shroud 54, and is disposed between the main body portion 3 and the fixing mechanism 52. The belt mounting portion 53 is configured to be able to adjust the position in the front-rear direction and the circumferential direction with respect to the shroud 54. In addition, the belt mounting portion 53 is configured to be able to mount a hook provided by a shoulder strap (not shown). The operator can lift the lawn mower 10 via the shoulder strap by equipping the shoulder strap, and mounting the hook of the shoulder strap to the belt mounting portion 53. Also, by adjusting the relative position in the front-rear direction and the circumferential direction of the belt mounting portion 53 with respect to the shroud 54, the operator can lift the lawn mower 10 at a position where work is easy. The shroud 54 is a tubular member extending in the front-rear direction, and the connection portion 4 is inserted through the inside thereof. That is, the shroud 54 is disposed so as to cover the connection portion 4. The shroud 54 has a front end portion 54a at the front side, and a rear end portion 54b at the rear side. The front end portion 54a is a box-like shape, and protrudes upward from the connection portion 4. The fixing mechanism 52 is provided on the upper surface of the front end portion 54a. The rear end portion 54b is connected to the main body portion 3. Note that, between the shroud 54 and the main body portion 3, and between the shroud 54 and the connection portion 4, a vibration-proof member (not shown) is preferably provided. Thereby, the vibration from the main body portion 3 and the connection portion 4 can be moderated. 2. Adjustment method of the position and angle of the handle 51 Next, the method of adjusting the position and angle of the handle 51 in the lawn mower 10 will be described with reference to other drawings. Figure 6 is a perspective view of the lawn mower as viewed from above, indicating the adjustment direction of the position and angle of the handle. Figures 7A-7C is an enlarged perspective view indicating the positional relationship of the fixing mechanism and the handle, for explaining the position adjustment of the handle. Figures 8A-8C is an enlarged perspective view showing the positional relationship of the fixing mechanism and the handle for explaining the angle adjustment of the handle. Note that, Figures 7A-7C and Figures 8A-8C the directions L, R, F, and B shown in Figure 6 correspond to the directions L, R, F, and B shown in [1] First, the length of the shoulder strap (not shown) is adjusted as appropriate. Then, the shoulder strap is hung on the shoulder. [2] Next, the fixing of the handle 51 is released by loosening the fastening member 522 of the fixing mechanism 52. Specifically, the fastening member 522 is loosened by holding the upper portion thereof and rotating it. Then, the position and angle of the handle 51 are adjusted as appropriate. As shown in Figure 6 , specifically, the operator adjusts the position and angle of the handle 51 by moving the holding portion 512 in any one of the directions L, R, F, and B while holding the holding portion 512. Note that the directions L and R are directions in which the handle 51 is moved in the left-right direction along the shaft 511a, and the directions F and B are directions in which the handle 51 is moved by rotation about the shaft 511a. Specifically, the adjustment of the directions L and R is performed with reference to the positional relationship between the pointer P of the fixing mechanism 52 and the position mark MP of the handle 51. In addition, the adjustment of the directions F and B is performed with reference to the positional relationship between the pointer P of the fixing mechanism 52 and the angle mark MA of the handle 51. Hereinafter, the adjustment of the directions L and R is first described in detail, and then the adjustment of the directions F and B is described in detail. Figures 7A-7C A state in which the handle 51 is adjusted in the direction L or the direction R is shown. Note that the directions F and B of the handle 51 are located in the center. That is, the pointer P is positioned in overlap with the angle mark MA3. First, in Figure 7A , the handle 51 is moved in the direction R with respect to the fixing mechanism 52 so that the pointer P is positioned in overlap with the position mark MP1. By positioning the pointer P in overlap with the position marker MP1, it is possible to grasp that the handle 51 has moved to the rightmost position with respect to the fixing mechanism 52. Specifically, since the position marker MP1 indicates the right direction from the position of the position marker MP1 as the variable direction of the handle 51, it is possible to grasp that the state of the handle 51 is the state in which the handle 51 has moved to the rightmost position with respect to the fixing mechanism 52. Figure 7A Next, in the state of the handle 51 having moved to the rightmost position with respect to the fixing mechanism 52, the handle 51 is adjusted to the standard position with respect to the fixing mechanism 52. Figure 7B Figure 7A In the state of the handle 51 having moved to the rightmost position with respect to the fixing mechanism 52, the handle 51 is adjusted to the standard position with respect to the fixing mechanism 52. That is, the pointer P is positioned in overlap with the standard marker MS. By positioning the pointer P in overlap with the standard marker MS (position marker MP3), it is possible to grasp that the handle 51 has adjusted to the standard position with respect to the fixing mechanism 52. Then, in the state of the handle 51 having adjusted to the standard position with respect to the fixing mechanism 52, the handle 51 is adjusted to the leftmost position with respect to the fixing mechanism 52. Figure 7C Figure 7B In the state of the handle 51 having adjusted to the standard position with respect to the fixing mechanism 52, the handle 51 is adjusted to the leftmost position with respect to the fixing mechanism 52. By positioning the pointer P in overlap with the position marker MP5, it is possible to grasp that the handle 51 has moved to the leftmost position with respect to the fixing mechanism 52. Specifically, since the position marker MP5 indicates the left direction from the position of the position marker MP5 as the variable direction of the handle 51, it is possible to grasp that the state of the handle 51 is the state in which the handle 51 has moved to the leftmost position with respect to the fixing mechanism 52. Figure 7C Note that, in the above description, although the adjustment of the directions L and R is described by referring to the positional relationship between the pointer P of the fixing mechanism 52 and the position marker MP of the handle 51, the adjustment of the directions L and R can also be performed by referring to the positional relationship between the side surface of the upper side member 52a of the fixing mechanism 52 (specifically, the left side surface in the vicinity of the shaft hole 521) and the position marker MP of the handle 51. By such a method, the handle 51 can be adjusted in the directions L and R. Next, the details of the adjustment of the directions F and B will be described. Figures 8A-8C The state in which the handle 51 is adjusted in the direction F or the direction B is shown. Note that the direction L and the direction R of the handle 51 are located in the center. ​​​​That is, the pointer P is positioned by overlapping with the position marker MP3. First of all, Figure 8A In this process, by moving the handle 51 relative to the fixing mechanism 52 in the direction B, the pointer P is positioned to overlap with the angle mark MA1. By positioning the pointer P in alignment with the angle mark MA1, the state of the handle 51 relative to the fixed mechanism 52 when it has moved to the rearmost position can be determined. Note that when handle 51 moves in direction B beyond angle mark MA1, angle mark MA, which overlaps with pointer P, disappears. Therefore, we can grasp Figure 8A The state is when the handle 51 moves to the last position in the rotation direction relative to the fixed mechanism 52. Next, in Figure 8B From Figure 8A The state begins by moving the handle 51 relative to the fixed mechanism 52 in the direction F, so that the pointer P is positioned to overlap with the angle mark MA3. That is, the pointer P is positioned to overlap with the standard marker MS. By positioning the pointer P in alignment with the standard mark MS (angle mark MA3), the state of the handle 51 relative to the fixed mechanism 52 adjusted to the standard position (angle) can be determined. Then, in Figure 8C From Figure 8B The state begins by moving the handle 51 further in the direction F relative to the fixing mechanism 52, so that the pointer P is positioned to overlap with the angle mark MA5. By positioning the pointer P in alignment with the angle mark MA5, the state of the handle 51 relative to the fixed mechanism 52 at its foremost position can be determined. Note that when handle 51 moves in the direction F past angle mark MA5, the angle mark MA that overlaps with pointer P disappears. Therefore, we can grasp Figure 8C The state is when the handle 51 is moved to the foremost position in the direction of rotation relative to the fixed mechanism 52. In this way, the handle 51 can be adjusted in directions F and B. [3] Specifically, if the operator does not know the preferred position and angle of the handle 51, firstly, adjust the handle 51 so that the pointer P overlaps with the standard mark MS. That is, adjust handle 51 to the standard position. [4] Then, the handle 51 is fixed by tightening the fastening member 522 of the fixing mechanism 52. [5] Next, in order to be able to lift the mower 10 in a position where it is easy to operate, the position of the belt mounting portion 53 in the front-rear direction and the circumferential direction is appropriately adjusted. [6] Then, the mower 10 is lifted, and the posture in which the mower 10 is operated and the position of the handle 51 are confirmed. [7] If necessary, readjustment is performed. Specifically, the mower 10 is placed on the ground again, and the position and angle of the handle 51 and the position of the belt mounting portion 53 in the front-rear direction and the circumferential direction are appropriately adjusted. At this time, when the position and angle of the handle 51 are adjusted, the handle 51 is adjusted in the direction in which the handle 51 is desired to be adjusted, that is, any one of the directions L, R, F, and B, by lifting the mower 10. Specifically, adjustment is performed with reference to the positional relationship between the pointer P of the fixing mechanism 52 and the mark M of the handle 51. For example, as adjustment in the direction R, the handle 51 is adjusted with respect to the fixing mechanism 52 so that the pointer P overlaps the position mark MP1. When the adjustment of the position and angle of the handle 51 with respect to the fixing mechanism 52 is completed, the handle 51 is fixed by tightening the fastening member 522 of the fixing mechanism 52. Thus, the handle 51 is adjusted to a position and an angle that are easy to use. According to this manner, even in a case where the operator does not grasp the preference of the position and angle of the handle 51, the handle 51 can be easily adjusted to a standard position and angle. In addition, the position and angle of the handle 51 can be adjusted to a desired state in a short time with the standard position and angle as a reference. That is, the number of operations of lifting or lowering the mower 10 can be reduced, and thus the burden on the operator can be reduced. In particular, in the case of the large-scale working machine 1, since the weight thereof is very large, if the number of times of lifting or lowering can be reduced, the burden on the operator can be sufficiently reduced. 3. Method of storing the handle 51 and method of returning it to an operable state Next, the method of storing the handle 51 and the method of returning it to an operable state will be described with reference to other drawings. Figure 9 is a perspective view of the mower in which the handle is in a stored state, as viewed from the upper side. Figure 9 The state in which the handle 51 is compactly housed for storage, transport, etc. of the lawn mower 10 (particularly, the state in which the dimensions in the up-down direction and the left-right direction are compactly folded) is shown. Note that the description is made taking the case where the operator has grasped the preference of the position and angle of the handle 51 as an example. [1] First, the method of changing the state in which the lawn mower 10 can be operated to the state in which the handle 51 is housed is described. Figure 1 Figure 9 The method of changing the state in which the handle 51 is housed to the state in which the lawn mower 10 can be operated is shown. [2] First, the fixation of the handle 51 is released by loosening the fastening member 522 of the fixation mechanism 52. [3] Subsequently, the handle 51 and the fixation mechanism 52 are rotated to the right with the axis of the fastening member 522 as the center, viewed from above. The angle of this right rotation is about 90°. [4] Next, the grip portion 512 of the handle 51 is moved downward with the axis 521a (see FIG. 6) of the fixation mechanism 52 as the center. Figure 3 [5] Then, the handle 51 is fixed by tightening the fastening member 522 of the fixation mechanism 52. According to this manner, the handle 51 of the lawn mower 10 can be easily housed. As a result, the lawn mower 10, etc. can be housed and carried without a large space. [6] Next, the method of fixing the handle 51 to the state in which the lawn mower 10 can be operated when the handle 51 is in the housed state is described. [7] First, the fixation of the handle 51 in the housed position is released by loosening the fastening member 522 of the fixation mechanism 52. [8] Subsequently, the grip portion 512 of the handle 51 is moved upward with the axis 521a (see FIG. 6) of the fixation mechanism 52 as the center. Figure 3 That is, the operation opposite to the operation S2 is performed. [9] Next, the handle 51 and the fixation mechanism 52 are rotated to the left with the axis of the fastening member 522 as the center, viewed from above. That is, the operation opposite to the operation S1 is performed. The angle of this left rotation is about 90°.​​​

[10] Then, the positional relationship between the pointer P of the fixing mechanism 52 and the position marker MP of the handle 51 is adjusted so that the handle 51 is in the desired position and angle. Specifically, for example, the position and angle of the handle 51 are adjusted so that the pointer P overlaps the standard marker MS (refer to FIG. 6). Figure 7B ). Note that, on the other hand, in the portable working machine disclosed in the above-described Patent Document 1 and Patent Document 2, in order to adjust to the preferred position and angle of the handle, the portable working machine needs to be lifted, and the preferred state is reproduced depending on the working posture remembered by the worker. That is, in order to adjust to the preferred position and angle of the handle, the portable working machine needs to be lifted. Further, since the preferred position and angle of the handle are adjusted depending on the working posture remembered by the worker, it is difficult to reproduce the preferred state.

[11] Finally, the handle 51 is fixed by tightening the fastening member 522 of the fixing mechanism 52. According to this way, by the marker M indicating the position and angle of the handle 51 with respect to the connecting portion 4, when the position or angle of the handle 51 is changed for storage, carrying, or the like, the position and angle of the handle 51 can be repeatedly restored to the original state. Further, according to this way, when the handle moved from the desired position and angle is fixed again to the desired position and angle, it can be reproduced easily in a short time. In addition, regarding the position and angle of the handle 51, the worker can grasp the desired position and angle in advance, and it is not necessary to lift the mower 10 in order to adjust the position and angle of the handle 51, so that the burden on the worker can be reduced. Especially in the case of the large working machine 1, since the weight of the working machine 1 is very large, by reducing the number of times of lifting or lowering, the burden on the worker can be greatly reduced. [Others] The mower 10 according to an embodiment can also be implemented in the following way. In the above-described embodiment, although the case where the pointer P is disposed on the left side of the fixing mechanism 52, and the marker M is disposed near the position of the pointer P in the state where the fixing mechanism 52 is attached to the extension portion 511 is described as an example, it is not limited thereto. For example, the pointer P can be disposed on the right side of the fixing mechanism 52, and the marker M can be disposed near the position of the pointer P in the state where the fixing mechanism 52 is attached to the extension portion 511. Also, it can be configured to have a through-hole that penetrates from the upper side to the lower side in the upper side member 52a of the fixing mechanism 52, and the positional relationship between the pointer P provided inside the through-hole and the mark M can be grasped. In the above embodiment, although the case where the pointer P protrudes in the left direction from the left side surface of the upper side member 52a of the fixing mechanism 52 is described as an example, it is not limited thereto. For example, the pointer P can be a member such as a seal that has no concave-convex. Specifically, it is preferable to provide an inclined portion in the fixing mechanism 52, and a seal is attached as the pointer P at the portion. Also, it can be provided in various ways as described below. (1) A work machine including: a work portion, a main body portion, a connection portion, and an operation portion; the work portion being connected to the main body portion via the connection portion, the operation portion having a handle and a fixing mechanism that fixes the handle to the connection portion, the handle including a mark that indicates a relative position and an angle with respect to the connection portion. According to this way, the position and the angle of the handle with respect to the connection portion are indicated by the mark, and when the position or the angle of the handle is changed for storage, carrying, or the like, the position and the angle of the handle can be repeatedly restored to the original state. (2) The work machine according to the above (1), wherein the mark includes a plurality of unit marks that are arranged at predetermined intervals. According to this way, the plurality of unit marks are arranged at predetermined intervals, and the position and the angle of the main body portion with respect to the handle can be finely adjusted according to the predetermined intervals. As a result, the position of the handle can be adjusted more easily and in a shorter time. (3) The work machine according to the above (1) or (2), wherein the handle is configured such that an axis thereof extends in a first direction, the first direction being a direction that crosses the connection portion, the mark includes a position mark and an angle mark, the position mark being configured to indicate a position in the first direction with respect to the connection portion, and the angle mark being configured to indicate a position in a rotation direction with respect to the connection portion, the rotation direction being centered on the axis. According to this way, the position and the angle of the handle can be indicated by the position mark and the angle mark, respectively. As a result, the work machine can be adjusted to the position and the angle of the handle that are easy to use more easily and in a shorter time. (4) The work machine according to any one of (1) to (3) above, wherein the mark includes a standard mark configured to indicate a standard position of the handle with respect to the main body. According to this, the standard position and angle of the handle can be seen by the mark. As a result, the work machine can be adjusted to a position and angle of the handle that is easy to use, based on the standard position. (5) The work machine according to any one of (1) to (4) above, wherein the connecting portion is configured so that its axis extends in a front-rear direction, the handle is configured so that its axis extends in a first direction that intersects the front-rear direction, and the mark is provided on a left side with respect to the axis of the connecting portion when viewed from a rear side. According to this, the position of the worker with respect to the work machine when adjusting the position and angle of the handle while placing the work machine on the ground and the position of the worker with respect to the work machine when picking up the work machine are located on the same side. As a result, after adjusting the position and angle of the handle, the worker does not need to change the position with respect to the work machine to pick up the work machine, and thus work can be started smoothly. (6) The work machine according to any one of (1) to (5) above, wherein the mark includes a plurality of unit marks, at least some of the plurality of unit marks are configured to indicate a direction in which the position of the handle is variable. According to this, the direction in which the position of the handle is variable is indicated by the arrangement and shape of the plurality of unit marks, and thus the adjustment direction or adjustment amount can be grasped easily. As a result, the position of the handle can be adjusted more easily and in a shorter time. (7) The work machine according to any one of (1) to (6) above, wherein the work machine is a mower, a blower, an edger, a trimmer, a cultivator, a sweeper, or a shaft hedge trimmer. According to this, work can be performed using a mower, a blower, an edger, a trimmer, a cultivator, a sweeper, or a shaft hedge trimmer that can adjust the handle to a position and angle that is easy to use and that can be adjusted easily in a short time. Of course, this is not limited thereto. Finally, although various embodiments relating to the present application have been described, these are presented by way of example and are not intended to limit the scope of the application. This new embodiment can be implemented in other various forms, and various omissions, substitutions, and changes can be made thereto without departing from the scope and spirit of the application. This embodiment and its variations are both within the scope and spirit of the application, and within the application described in the claims and its equivalent range. Explanation of reference numerals 1: work machine; 10: mower; 2: work portion; 21: rotating portion; 22: nylon rope; 23: cover; 3: main body portion; 31: housing; 32: power source; 4: connecting portion; 4a: shaft; 41: operating lever; 42: drive transmission shaft; 5: operating portion; 51: handle; 511: extension portion; 511a: shaft; 512: grip portion; 512a: grip portion; 512b: grip portion; 513: trigger lever; 514: lock lever; 515: main switch; 52: fixing mechanism; 52a: upper side member; 52b: lower side member; 521: shaft hole; 521a: shaft; 522: fastening member; 523: screw; 53: belt mounting portion; 54: shroud; 54a: front end portion; 54b: rear end portion; A: area; G1: predetermined interval; G2: predetermined interval; M: mark; MA: angle mark; MA1: angle mark; MA2: angle mark; MA3: angle mark; MA4: angle mark; MA5: angle mark; MP: position mark; MP1: position mark; MP2: position mark; MP3: position mark; MP4: position mark; MP5: position mark; MS: standard mark; P: pointer; L: direction; R: direction; F: direction; B: direction; S1: operation; S2: operation; θ: predetermined angle.

Claims

1. A work machine characterized by comprising: Possessing: a work portion, a main body portion, a connecting portion, and an operation portion; the work portion is connected to the main body portion via the connecting portion, the operation portion has a handle and a fixing mechanism that fixes the handle to the connecting portion, the handle possesses a mark that indicates a relative position and angle with respect to the connecting portion.

2. The work machine according to claim 1, wherein the mark includes a plurality of unit marks, the plurality of unit marks are arranged at predetermined intervals.

3. The work machine according to claim 1 or 2, wherein the handle is configured so that its axis extends in a first direction, the first direction being a direction that crosses the connecting portion, the mark includes a position mark and an angle mark, the position mark is configured to indicate a position in the first direction with respect to the connecting portion, the angle mark is configured to indicate a position in a rotation direction centered on the axis with respect to the connecting portion.

4. The work machine according to any one of claims 1 to 3, wherein the mark includes a standard mark, the standard mark is configured to indicate a standard position of the handle with respect to the main body portion.

5. The work machine according to any one of claims 1 to 4, wherein the connecting portion is configured so that its axis extends in a front-rear direction, the handle is configured so that its axis extends in a first direction that crosses the front-rear direction, and the mark is provided on a left side with respect to the axis of the connecting portion when viewed from a rear side.

6. The work machine according to any one of claims 1 to 5, wherein the mark includes a plurality of unit marks, at least some of the plurality of unit marks are configured to indicate a variable position direction of the handle.

7. The work machine according to any one of claims 1 to 6, wherein the work machine is a mower, a blower, an edger, a trimmer, a cultivator, a sweeper, or a hedge trimmer.

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