JP2014226072A - Walking type work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a walking type work machine which suppresses an influence of sink marks that may appear on a surface of a cover to prevent the deterioration of the appearance.SOLUTION: A walking type work machine includes: a top cover 81 which is attachable to a side of an engine mounted on a travelling machine body; and an engagement member 95 which is provided on the top cover 81 and can engage relative to an engaged member 108 on the side of the engine. On a side of an underside surface 88 of the top cover 81, a separation part 97 which is separated from the underside surface 88 of the top cover 81 by a gap S and where the engagement member 95 is attached, a first linear joining part 98 which is continuously provided on one end of the separation part 97 and is joined to the underside surface 88 of the top cover 81, and a second linear joining part 99 which is continuously provided on the other end of the separation part 97 and is joined to a point different from the point where the first joining part 98 is joined on the underside surface 88 of the top cover 81 are provided.

Description

  The present invention relates to a walk-type work provided with a cover that can be mounted on the engine side mounted on a traveling machine body, and an engagement member that is provided on the cover and can be engaged with an engaged member on the engine side Related to the machine.

  A conventional walking type working machine is described in Patent Document 1, for example. The walking type working machine of Patent Document 1 has a cover (“attachment portion cover [23]” in Patent Document 1) that can be attached to the engine side mounted on a traveling machine body (“Self-propelled vehicle body” in Patent Document 1). Is provided. On the cover, an engagement member (Patent Document 1) that can be engaged with an engaged member (in Patent Document 1, “round bar-shaped protrusion [52c]”, “engagement pin [52b]”). 1, “elastic sandwiching body [26]” and “claw piece [25]”) are directly joined to the back surface of the cover. By engaging the engaging member provided on the cover with the engaged member on the engine side, the cover can be attached to the engine side.

JP2009-6811A (particularly FIGS. 4 to 6)

  However, in the above prior art, since the engaging member is directly joined to the back surface of the cover, the influence of sink marks such as dents caused by thermal shrinkage that occurs at the joint portion between the back surface of the cover and the engaging member. As a result, the shape or the like of the engaging member may appear even on the surface of the cover. In such a case, the appearance may be deteriorated.

  In view of the above circumstances, it has been desired to provide a walking type work machine that can suppress the influence of sink marks that may appear on the surface of the cover and prevent the appearance from deteriorating.

The walking work machine according to the present invention is:
A cover that can be mounted on the engine side mounted on the traveling aircraft,
An engagement member provided on the cover and engageable with an engaged member on the engine side,
On the back side of the cover,
A separation portion that is spaced apart from the back surface of the cover with a gap and to which the engagement member is attached;
A linear first joint connected to one end of the spacing portion and joined to the back surface;
And a linear second joint that is connected to the other end of the spaced-apart portion and joined to a portion different from the first joint on the back surface.

  According to the present invention, on the back side of the cover that can be attached to the engine side mounted on the traveling machine body, the engaging member is attached to the separated portion that is spaced apart from the back surface of the cover. For this reason, sink marks due to thermal contraction for attaching the engaging member to the separation portion are generated in the separation portion spaced apart from the back surface of the cover and are not generated at all on the back surface of the cover. For this reason, it is possible to reduce the possibility of the influence of sink marks such as dents appearing on the surface of the cover. Moreover, the separation portion to which the engaging member is attached is joined to the back surface of the cover by the first joint portion provided continuously at one end of the separation portion and the second joint portion provided continuously at the other end of the separation portion. Since it is fixed, the engaging member can be supported stably.

  And since the 1st junction part and the 2nd junction part are each made into the shape of a straight line, even if the influence of sink marks, such as a dent, appears in the surface of a cover, it will be in a straight 1st junction part. The influence of sink marks appearing on the surface of the cover can be made inconspicuous from the direction view along the line view or the direction view along the linear second joint. Thus, according to the present invention, it is possible to suppress the influence of sink marks appearing on the surface of the cover, and it is possible to prevent a decrease in aesthetic appearance.

  The said structure WHEREIN: It is suitable when the longitudinal direction of said 1st junction part and the longitudinal direction of said 2nd junction part are substantially parallel.

  According to this configuration, since the longitudinal direction of the first joint portion and the longitudinal direction of the second joint portion are substantially parallel, even if the influence of sink marks such as dents appears on the surface of the cover, From the longitudinal view of the first joint or the longitudinal view of the second joint, the influence of sink marks appearing on the surface of the cover can be made inconspicuous.

In the above configuration, the traveling machine body includes a handle extending rearward,
It is preferable that the longitudinal direction of the first joint portion and the longitudinal direction of the second joint portion are along the front-rear direction of the traveling machine body.

  According to this configuration, when the operator operates the handle that extends rearward, the driver's line of sight is along the front-rear direction of the traveling machine body. For this reason, if the longitudinal direction of the first joint and the longitudinal direction of the second joint are along the front-rear direction of the traveling machine body, the influence of sink marks such as dents on the surface of the cover was apparent. However, the effect of sink marks appearing on the surface of the cover can be made inconspicuous from the driver's perspective.

In the above configuration, on the surface side of the cover, a linear step portion with a changing height is provided,
It is preferable that the first joint portion and the second joint portion are formed so as to overlap the stepped portion in plan view.

  According to this configuration, the front surface side of the cover is provided with the linear step portion whose height changes, and the first joint portion and the second joint portion overlap the step portion in plan view. Even if the effects of sink marks such as dents appear on the surface of the cover corresponding to the first joint and the second joint, sink marks appear on the linear stepped parts that change in height. The effect of sink marks that appear on the surface of the cover can be made inconspicuous.

It is a whole side view of the walk type cultivator in a first embodiment. It is a whole top view of the walk type cultivator in a first embodiment. It is a perspective view of the walk type cultivator in the first embodiment as viewed from the right rear side. It is a disassembled perspective view which shows the attachment structure of the fuel tank and airframe cover in 1st embodiment. It is a disassembled perspective view which shows the attachment structure of the front cover and top cover in 1st embodiment. It is side surface sectional drawing which shows the periphery of the mounting seat of the top cover in 1st embodiment. It is a back sectional view showing the periphery of the mounting seat of the top cover in the first embodiment. It is a perspective view of the top cover in the first embodiment in an oblique rear view. It is side surface sectional drawing which shows the periphery of the mounting seat of the top cover in 2nd embodiment. It is a back sectional view showing the circumference of the attachment seat of the top cover in a second embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, “front” is the traveling direction of the walking work machine, and “rear” is the backward direction of the walking work machine.
[First embodiment]
First, a first embodiment of the present invention will be described based on the drawings.

[Schematic configuration of walking type tillage machine]
As shown in FIGS. 1 to 3, the walking type cultivator that is an example of the “walking type working machine” includes a traveling machine body 13 that includes an engine frame that supports the engine 10, a housing of the transmission 12, and the like, A pair of left and right traveling wheels 14 that support the traveling machine body 13 with respect to the ground are provided. The engine 10 is disposed on the front side of the traveling machine body 13. The transmission device 12 is disposed in a slanting rearward downward posture on the rear side of the engine 10. A fuel tank 15 is disposed above the transmission 10 on the rear side of the engine 10. A rotary tiller 16 is connected to the rear end of the traveling machine body 13 as a working device. Further, the traveling machine body 13 can be changed in posture between a forward rocking posture and a backward rocking posture, and when it is set to the backward rocking posture, the steering handle 17 (corresponding to a “handle”) extending toward the rear of the vehicle body. Is provided. The rotary tilling device 16 includes a tilling claw shaft 18, a rotary tilling claw 19 attached to the tilling claw shaft 18 and driven to rotate, a grounding resistance rod 20, and a tilling rotor cover 21 that covers the top of the rotary tilling claw 19. The leveling plate 22 is provided. Such a walking cultivator is provided with a body cover 23 that covers the engine 10, the fuel tank 15, and the transmission 12 above.

  The output of the engine 10 is transmitted to the transmission 12 via a belt type power transmission mechanism and a main clutch (not shown). The power shifted by the transmission 12 to the second forward speed and the first reverse speed is transmitted to the left and right axles 24 shown in FIGS. 1 and 3 through the differential mechanism to drive the traveling wheels 14. Further, the PTO output is transmitted from the transmission 12 to the rotary tiller 16 as a branch output. Although not shown, the main clutch can be constructed by, for example, a tension pulley. The tension pulley is configured so that the transmission belt wound around the output pulley and the input pulley of the belt-type power transmission mechanism can be switched between a tensioned state and a relaxed state.

[Structure around the steering wheel]
As shown in FIGS. 1 to 3, a handle post 25 that extends obliquely upward above the rotary tiller 16 is fixed to the rear end of the traveling machine body 13. As shown in FIG. 1, the steering handle 17 can swing between a forward swinging posture and a backward swinging posture via a lateral swinging shaft 26 at the distal end portion of the rear portion of the handle post 25. It is supported. In other words, the steering handle 17 swings around the swing shaft 26 so that the forward swing posture extending to the front side of the traveling machine body 13 which is the transport posture or the storage posture and the rear swing posture which is the walking work posture. It can be changed to. The steering handle 17 in the forward swinging posture is substantially horizontally forward so as to overlap with the transmission 12, the fuel tank 15, and the upper side of the engine 10 in a side view, as indicated by a one-dot chain line in FIG. The front end position in the front-rear direction is substantially the same as the front end position of the traveling machine body 13 and the engine 10. The steering handle 17 in the backward swinging posture extends rearward and upward from the handle post 25 as indicated by a solid line in FIG. 1, and the rear end position of the steering handle 17 in the backward swinging posture is the rotary tillage. Located behind the device 16. Note that the steering handle 17 can be set to a plurality of or arbitrary adjustment swing angle positions in the backward swing posture, and can be freely changed in position according to the physique of the driver.

  As shown in FIGS. 2 and 3, the steering handle 17 is formed by a rod body bent in a U shape as a whole, and left and right free ends are defined as a left base end portion 27 and a right base end portion 28. Is formed. The left extension portion 29 connected to the left base end portion 27 and the right extension portion 30 connected to the right base end portion 28 are extended while extending the distance from each other to substantially the width of the aircraft, and become parallel to each other. It is extended and connected by a connecting portion 31 extending in the body width direction. A clutch operating lever 32 extending in parallel with the connecting portion 31 over the left extension 29 and the right extension 30 is provided on the upper portion of the steering handle 17. The right extension 30 is provided with an accelerator operating tool 33, a differential lock operating lever 34, and a PTO on / off button 35. A speed change operation lever 36 for operating a shift gear for speed change provided in the speed change device 12 is operated rearward and upward from the speed change device 12 between the left base end portion 27 and the right base end portion 28 to operate the steering handle 17. It extends to a position where it can be easily operated by a pedestrian.

  As shown in FIG. 1, a plate-shaped receiving bracket 39 is fixed to the distal end portion of the handle post 25 in order to connect the steering handle 17. A support member 40 that rotatably supports the swing shaft 26 is fixed to the upper surface of the receiving bracket 39. As understood from FIGS. 1 and 2, the left base end portion 27 and the right base end portion 28 of the steering handle 17 are attached to a portion of the swing shaft 26 that protrudes outward from the support member 40. As shown in FIGS. 1 to 3, the steering handle 17 can be locked at a predetermined swinging position by a well-known screw tightening mechanism using a lock knob 41. Further, the upper portion of the swing shaft 26 and the support member 40 is covered with a shaft cover 42 in which a curved concave portion extending in the front-rear direction is formed in order to avoid interference with the speed change operation lever 36.

  As shown in FIGS. 1 to 4, a front guard 43 is provided at the front end of the traveling machine body 13. The front guard 43 is composed of a bar bent in a U shape. The left and right open ends of the front guard 43 are fixed to the front end of the traveling machine body 13 and are raised to protect the front of the engine 10. A handle member 44 is provided at the rear portion of the handle post 25. As shown in FIG. 1, the handle member 44 is attached to the lower surface of the receiving bracket 39 and has an appearance that a part is cut off from a rectangular ring, and is a member obtained by bending a rod into a U-shape. Is formed. That is, as shown in FIG. 3, the handle member 44 connects the fixed portion 45 that is a free end, the action portion 46 that functions as a rope hook and a lifting grip, and the fixed portion 45 and the action portion 46. Connecting portion 47 to be connected. The fixing portion 45 is joined to the lower surface of the receiving bracket 39 by welding. The connecting portion 47 extends rearward from the fixed portion 45, and the action portion 46 is formed at the extended end portion of the connection portion 47, whereby the action portion 46 is separated from the rear end portion of the receiving bracket 39, and the handle The member 44 is easy to use as a rope hook or as a lifting grip. Moreover, as apparent from FIGS. 1 and 3, the handle member 44 is covered from above by the steering handle 17 that is in a swinging posture in use, which is also aesthetically advantageous. . Then, when the steering handle 17 is swung in the forward swinging posture and folded to be in a transport state in which the walking type cultivator can be carried, the handle member 44 appears at a position where the steering handle 17 is not obstructed. At that time, the upper portion of the handle member 44 is a free space. Thereby, the operation | work which hangs a rope on the action part 46, and the operation | work which carries the walk type tiller by holding the action part 46 become easy. Further, as can be understood from FIG. 2, the distance between the left base end portion 27 and the right base end portion 28 of the steering handle 17 is smaller than the width of the handle member 44 in the transverse direction. As a result, when the steering handle 17 is swung rearward, the left base end portion 27 and the right base end portion 28 abut against the handle member 44 and further swinging is prevented. That is, the handle member 44 also functions as a rocking stopper that determines the limit position of the rocking displacement of the steering handle 17 to the backward rocking posture.

[Structure around the fuel tank 15]
As shown in FIGS. 4 to 6, an upper portion of the engine 10 has a plurality of legs 50 attached to the engine 10, and is supported by the plurality of legs 50 and extends substantially horizontally above the engine 10. A front stay 53 having a horizontal portion 51 is provided. An intermediate stay 54 extending in the front-rear direction is connected to the rear end portion of the front stay 53. As shown in FIGS. 4 and 6, the rear end portion of the intermediate stay 54 is connected to the front end portion of a tank bracket 55 formed in a plate shape that is bent along the bottom surface of the fuel tank 15. ing. Connected to the rear lower portion of the tank bracket 55 is a front end portion of a rear stay 56 formed of a pair of left and right plates extending obliquely upward. A lower end portion of the rear stay 56 is fixed to the traveling machine body 13, and a tank bracket 55 is fixed to an upper end portion of the rear stay 56. As shown in FIG. 4, the upper edges of a pair of left and right plate members constituting the rear stay 56 are connected by a plate-shaped transmission guide panel 57. The speed change guide panel 57 is formed with a speed change guide groove 58 through which the speed change operation lever 36 is inserted so as to be displaceable. The rear stay 56 and the speed change guide panel 57 can be integrally manufactured by bending or the like in addition to connecting different members.

  As shown in FIGS. 4 and 6, the fuel tank 15 is placed on the tank bracket 55. The fuel tank 15 is connected to the tank bracket 55 by a fastening member such as a bolt using an attachment hole 61 formed in the fixed attachment portion 60. The fuel tank 15 has a tank main body 62 made of a substantially rectangular parallelepiped porous resin, a cylindrical oil supply cylinder portion 63, and a cylinder base portion 64 that connects the tank main body 62 and the oil supply cylinder portion 63. doing.

  As shown in FIG. 4, the side wall of the tank body 62 includes a front wall 66, a left side wall 67, a right side wall 68, and a rear wall 69. A fixing mounting portion 60 for fixing is formed as a protruding piece on both the left and right sides of the front wall 66, and a mounting hole 61 is provided in the center thereof. The rear wall 69 has a shape that protrudes rearward as much as the substantially triangular protruding side surface 70 is formed. Due to the rear projecting shape of the rear wall 69, a rear projecting surface 71 is formed in the lower half of the rear wall 69. As will be described in detail later, the rear protruding surface 71 functions as a remaining amount display surface that allows the remaining amount of fuel in the tank body 62 to be confirmed from the outside. The protruding side surface 70 functions as a daylighting surface, and the fuel visibility on the rear protruding surface 71 is improved.

  As shown in FIG. 4 and FIG. 6, the cylinder base portion 64 is composed of a cover holding portion 72 and a concave groove 73. The cover holding part 72 is formed as a step having a larger diameter than the oil supply cylinder part 63. The concave groove 73 is created by an annular curved surface formed so as to surround the cover holding portion 72, and is connected to the tank body 62. As shown in FIG. 4, a part of the rear side of the concave groove 73 is shallow, and this shallow portion functions as an escape port 75 for discharging fuel and rainwater collected in the concave groove 73. . The opening of the oil supply cylinder 63 functions as an oil supply port 76 and is screwed and sealed by an oil supply cap 78 having an inner cap 77.

[Airframe cover]
The body cover 23 is made of resin, and as shown in FIGS. 1 to 4 and 6, a front cover 80 that covers the upper front region of the engine 10 and a top cover 81 (“ And a rear cover 82 in an obliquely lowered posture that covers the transmission 12. The front cover 80, the top cover 81, and the rear cover 82 are each detachable from the engine 10 side, and weight reduction is achieved by reducing the thickness thereof.

〔front cover〕
As shown in FIGS. 4 and 5, the front cover 80 is configured to be attachable to a front stay 53 fixed to the engine 10 mounted on the traveling machine body 13 by a fastening member such as a bolt. ing. As shown in FIGS. 4 to 6, the front cover 80 is provided with a rear skirt portion 80 a that covers the front upper end region of the engine 10. The front rear end edge 85 of the front cover 80 is disposed so as to substantially abut against the top front end edge 86 of the top cover 81.

[Top cover]
As shown in FIGS. 1 to 7, the top cover 81 is configured to be attachable to the side of the engine 10 mounted on the traveling machine body 13 in a forward downward inclined posture (see FIG. 1). The top cover 81 is shaped to bulge outward as a whole. As shown in FIGS. 4, 5, and 8, the top cover 81 is formed with a top skirt portion 81 a that is bent downward at the left end portion and the right end portion. The top cover 81 can be attached to the engine 10 side in the front region and the rear region. As shown in FIGS. 6 and 7, the top cover 81 has a front surface 87 facing outward from the fuselage and a rear surface 88 facing the engine 10 side. As shown in FIGS. 7 and 8, a first height portion 89 and a second height portion 90 having different heights are formed on the surface 87 of the top cover 81. The second height portion 90 is formed so that both left and right ends are sandwiched between the first height portions 89 and lower than the first height portion 89. That is, the top cover 81 has a shape in which the left and right center portions are recessed toward the engine 10 side from the left and right ends, and the top cover 81 is provided between the first height portion 89 and the second height portion 90. A first step 91 (an example of a “step”) and a second step 92 (an example of a “step”) that change in height are formed. Both the first step portion 91 and the second step portion 92 are formed in a linear shape along the front-rear direction of the traveling machine body 13. As shown in FIG. 7, in the first step portion 91 and the second step portion 92, inclined surfaces that are inclined downward from the laterally outer side to the laterally inner side are formed along the longitudinal direction of the body.

[Mounting seat]
As shown in FIGS. 5 and 6, a resin mounting seat 96 for mounting the engaging member 95 is provided on the back surface 88 side of the front region of the top cover 81. The top cover 81 has the front region of the top cover 81 attached to the engine 10 side by engaging the engaging member 95 with the engaged member 108 on the engine 10 side. As shown in FIGS. 5 to 7, the mounting seat 96 includes a separation portion 97 for attaching the engaging member 95, a first joint portion 98 for joining one end portion of the separation portion 97 to the back surface 88 of the top cover 81, and separation. And a second joint 99 that joins the other end of the part 97 to the back surface 88 of the top cover 81. The separation portion 97 is formed in a plate shape extending in the lateral width direction of the traveling machine body 13, and is separated from the back surface 88 of the top cover 81 with a gap S therebetween. The first joint portion 98 is continuously provided so as to extend in the vertical direction from one end of the separation portion 97 in the lateral width direction of the traveling machine body 13, and the upper end portion thereof is joined to the back surface 88 of the top cover 81 by welding. The second joint portion 99 is continuously provided so as to extend in the vertical direction from the other end of the separation portion 97 in the lateral width direction of the traveling machine body 13, and the upper end portion thereof is joined to the back surface 88 of the top cover 81 by welding. The separation part 97 has a certain width in the front-rear direction of the traveling machine body 13, and the first joint part 98 and the second joint part 99 are only the same as the width of the separation part 97 in the front-rear direction of the traveling machine body 13. It has a width. The first joint portion 98 and the second joint portion 99 are formed in a straight line along the front-rear direction of the traveling machine body 13, and the separation portion 97 extends between the first step portion 91 and the second step portion 92. The back surface 88 of the top cover 81 is provided in a posture extending in the lateral width direction of the traveling machine body 13.

  The separation portion 97 includes a first boss portion 101, a second boss portion 102, and a plate-like portion 103. The first boss portion 101 and the second boss portion 102 are provided in the lateral width direction end of the traveling machine body 13 at the separation portion 97, and the engaging member 95 is attached by the fastening member 104. The first boss portion 101 and the second boss portion 102 are arranged so as to be within the front-rear width of the separation portion 97. The plate-like portion 103 is formed in a plate shape that connects the first boss portion 101 and the second boss portion 102 and extends downward from the separation portion 97.

  The engaging member 95 includes a horizontally horizontal plate surface portion 105, a first leaf spring portion 106 that extends downward from one lateral end side of the plate surface portion 105, and a second leaf spring portion that extends downward from the other lateral end side of the plate surface portion 105. 107. Both end portions of the plate surface portion 105 are fixed to the first boss portion 101 and the second boss portion 102 in the lateral width direction of the traveling machine body 13.

  When the first boss portion 101 and the second boss portion 102 are provided in the mounting seat 96, the first boss portion 101 and the second boss are formed in the separation portion 97 that is separated from the back surface 88 of the top cover 81 with a gap S therebetween. Since the portion 102 is provided, sink marks due to thermal contraction when forming the first boss portion 101 and the second boss portion 102 occur in the separation portion 97 and do not occur at all on the back surface 88 of the top cover 81. By attaching the upper ends of the first joint portion 98 and the second joint portion 99 to the back surface 88 of the top cover 81, the mounting seat 96 is attached to the back surface 88 of the top cover 81. May cause sink marks due to thermal contraction when the first joint portion 98 and the second joint portion 99 are joined. Therefore, the first joint portion 98 and the second joint portion 99 have a linear shape extending in the front-rear direction of the traveling machine body 13 with the longitudinal direction thereof being the front-rear direction of the traveling machine body 13. Thereby, when the traveling machine body 13 is viewed in the front-rear direction, the influence of sink marks appearing on the surface 87 of the top cover 81 can be made inconspicuous. In addition, as shown in FIG. 8, the longitudinal directions of the first joint portion 98 and the second joint portion 99 are substantially parallel, and the first joint portion 98 and the second joint portion 99 are in the first view in plan view. Since it is formed so as to overlap with the stepped portion 91 and the second stepped portion 92, the effect of sink marks appearing on the surface 87 of the top cover 81 is not noticeable from the operator who operates the steering handle 17, and the aesthetic appearance is reduced. Can be prevented.

  As shown in FIGS. 4 to 6, in order to engage the engaging member 95, an engaged member 108 in which a rod is bent in a U shape is formed on the upper portion of the front stay 53 on the engine 10 side. It is fixed. The engaged member 108 is disposed in front of the fuel tank 15. The engaged member 108 is disposed in front of the fuel tank 15. The engaged member 108 includes a first front / rear portion 109 that faces the direction along the front-rear direction of the traveling machine body 13, a lateral portion 111 that has one end connected to the first front / rear portion 109 and faces the direction along the lateral direction, and a lateral portion. And a second front-rear portion 110 that is connected to the other end of 111 and faces the direction along the front-rear direction of the traveling machine body 13. The engaging member 95 is configured to be detachably engageable with an engaged member 108 provided on a horizontal portion of the front stay 53 fixed to the engine 10 side. That is, the top cover 81 pushes the top cover 81 toward the engine 10 to bend the first leaf spring portion 106 and the second leaf spring portion 107 of the engaging member 95, and the first front and rear portions of the engaged member 108. 109 and the second front and rear portion 110 can be attached to the engine 10 side.

  As shown in FIGS. 1 to 3, the rear region of the top cover 81 is held by the fuel tank 15. In the rear region of the top cover 81, a substantially circular recess 113 that is recessed downward is formed. A through-hole 114 is formed in the center of the recess 113 through which the fuel supply cylinder portion 63 of the fuel tank 15 and the fuel supply cap 78 pass through so as to protrude above the top cover 81. The peripheral edge portion of the through hole 114 is formed as a horizontal protrusion 115, and an annular grommet 116 having elasticity is attached to the horizontal protrusion 115. A circumferential groove is formed on the outer peripheral surface of the grommet 116, and a horizontal protrusion 115 is fitted into the circumferential groove. That is, the diameter of the through hole 114 is substantially the same as the inner peripheral diameter of the grommet 116. Further, the inner peripheral diameter of the grommet 116 is larger than the outer diameters of the fuel cap 78 and the fuel cylinder portion 63 of the fuel tank 15. Accordingly, the top cover 81 can be removed because the through hole 114 can pass through the fuel cap 78 even when the fuel tank 15 to which the fuel cap 78 is attached is fixed. The side wall surface of the cover holding portion 72 functions as a fitting surface for fitting with the horizontal protrusion 115 on the peripheral edge of the through hole 114 of the top cover 81.

  That is, the top cover 81 is attached to the engine 10 side by engaging the engaging member 95 and the engaged member 108 and fitting the through hole 114 and the fuel tank 15. Further, the engagement is maintained by the weight of the top cover 81. By such engagement, the front portion of the top cover 81 is held by the front stay 53. Due to the mounting structure of the top cover 81, the top cover 81 can be easily detached and reattached while the fuel tank 15 is fixed.

  As shown in FIGS. 3, 4, and 6, the fuel tank 15 is provided with an annular groove on the side surface of the cover holding portion 72, and the inner peripheral surface of the grommet 116 enters the annular groove. As a result, the rear portion of the top cover 81 is held by the fuel tank 15. That is, the grommet 116 functions as a held portion of the top cover 81 with respect to the cover holding portion 72. Further, as shown in FIG. 6, the horizontal protrusion 115 is formed with escape holes 118 that are through slits that are not blocked by the grommets 116 at two opposing positions, and spilled fuel or the like is released. It can escape through the hole 118.

[Rear cover]
As shown in FIGS. 3 and 4, the rear cover 82 has a notch opening in the connection region between the rear cover 82 and the top cover 81, and extends horizontally between the top cover 81 and the rear cover 82. A viewing window 119 is formed. Further, the rear cover 82 is provided with a rectangular opening 120 that allows the transmission operation lever 36 to be inserted and displaced.

  Further, as shown in FIGS. 3 and 4, the top cover 81 and the rear cover 82 are connected so as to create a viewing window 119. The top rear end edge 122 of the top cover 81 is formed so as to cover only the upper part of the rear wall 69 protruding rearward of the fuel tank 15. Further, in order to form a viewing window 119 at the center of the rear front edge 123 of the rear cover 82, until it corresponds to the lower end of the remaining amount display surface (rear protruding surface 71) formed on the rear wall 69 of the fuel tank 15. A rectangular cutout having a depth of 5 mm is provided. Due to this notch, a window edge 124 is formed at the rear front edge 123 of the rear cover 82, and the remaining amount display surface (rear protruding surface 71) of the fuel tank 15 is formed by the window edge 124 and the top rear edge 122 of the top cover 81. A viewing window 119 is created to expose the. Further, the window edge 124 has a shape and dimension that also exposes the protruding side surface 70 provided on the rear wall 69 of the fuel tank 15. An opening 120 provided in the rear cover 82 and exposing the shift guide panel 57 is provided adjacent to the lower side of the viewing window 119. A shift guide groove 58 is formed in the shift guide panel 57, and the operator grasps the shift position based on the position of the shift operation lever 36 in the shift guide groove 58. Therefore, since the remaining amount display surface of the fuel tank 15 exposed through the viewing window 119 exists in the immediate vicinity of the exposed position of the shift guide panel 57 that the driver frequently pays attention to, the driver naturally Pay attention to the remaining amount. Further, since the observation window 119 and the fuel filler port 76 of the fuel tank 15 are arranged close to each other, the fuel level can be visually observed through the observation window 119 while pouring fuel into the fuel filler hole 76.

  By adopting the above configuration, it is assumed that distortion or dent due to thermal contraction occurs in the surface 87 portion of the top cover 81 located on the opposite side of the first joint portion 98 or the second joint portion 99. However, from the viewpoint of the driver who operates the walking cultivator as shown in FIG. 8, the distortion and the dent appearing on the surface of the top cover 81 are less noticeable.

[Second Embodiment]
A second embodiment of the present invention will be described with reference to the drawings. In the second embodiment, the top cover 81 can be attached to and detached from the engine 10 side with a configuration different from that of the first embodiment. In addition, each structure of 2nd embodiment is the same as the structure in 1st embodiment except the part demonstrated below.

  In the second embodiment, as shown in FIGS. 9 and 10, instead of the engaging member 95 and the engaged member 108 in the first embodiment, the first engaging member 145 and the second engaging member are used. A member 146 and an engaged member 158 are provided. The first engagement member 145 and the second engagement member 146 are provided in the separation portion 97 at a distance in the lateral width direction of the traveling machine body 13. The first engagement member 145 and the second engagement member 146 extend downward from the separation portion 97, and the lower end portion thereof can be expanded and contracted by an elastic force. The engaged member 158 includes an attachment portion 159 attached to the front stay 53, a rising portion 160 rising upward from the attachment portion 159, a first hole portion 148 that engages through the first engagement member 145, and a first hole portion 148. And an engaging portion 161 having a second hole portion 149 that is inserted through and engaged with the second engaging member 146. The lower end portions of the first engagement member 145 and the second engagement member 146 are reduced in diameter, and the first engagement member 145 and the second engagement member 146 are inserted through the first hole portion 148 and the second hole portion 149. Thus, the engaged member 158 is attached to the separating portion 97 so as to be prevented from coming off by an elastic force.

  [Other Embodiments]

  (1) In the first embodiment and the second embodiment, the example in which the first step portion 91 and the second step portion 92 are formed in a straight line has been shown. 91 and the second stepped portion 92 may be formed in a curved shape.

  (2) In the first embodiment and the second embodiment, the first joint portion 98 is formed so as to overlap the first step portion 91 in plan view, and the second joint portion 99 is formed with the second step portion 92. Although the example formed so that it overlaps was shown, it is not restricted to this. The first joint portion 98 and the second joint portion 99 may be formed so as not to overlap the first step portion 91 and the second step portion 92 in plan view.

  (3) In the first embodiment and the second embodiment described above, an example in which the first step portion 91 and the second step portion 92 are formed as the step portions on the top cover 81 has been shown. A step portion may not be formed on the top cover 81.

  (4) In the first embodiment and the second embodiment, the example in which the longitudinal direction of the first joint portion 98 and the longitudinal direction of the second joint portion 99 are along the front-rear direction of the traveling machine body 13 is shown. Not limited to. For example, the first joint portion 98 and the second joint portion 99 are arranged such that the longitudinal direction of the first joint portion 98 and the longitudinal direction of the second joint portion 99 are inclined from the front-rear direction or face the lateral direction. It may be formed.

  (5) In the first embodiment and the second embodiment described above, the example in which the longitudinal direction of the first joint portion 98 and the longitudinal direction of the second joint portion 99 are substantially parallel is shown, but the present invention is not limited thereto. . For example, the first joint portion 98 and the second joint portion 99 may be formed so that the longitudinal direction of the first joint portion 98 and the longitudinal direction of the second joint portion 99 intersect.

  The present invention can be applied to various walking type work machines such as a walking type rice transplanter and a walking type lawn mower in addition to the walking type cultivator.

10: Engine 13: Traveling machine body 17: Steering handle ("handle")
81: Top cover ("cover")
88: Back surface 91: First step portion ("step portion")
92: Second step portion ("step portion")
95: Engagement member 97: Separation part 98: First joint part 99: Second joint part 108: Engaged member S: Gap

Claims (4)

A cover that can be mounted on the engine side mounted on the traveling aircraft,
An engagement member provided on the cover and engageable with an engaged member on the engine side,
On the back side of the cover,
A separation portion that is spaced apart from the back surface of the cover with a gap and to which the engagement member is attached;
A linear first joint connected to one end of the spacing portion and joined to the back surface;
A walking-type work machine provided with a linear second joint portion that is connected to the other end of the separation portion and joined to a portion different from the first joint portion on the back surface.   The walking type working machine according to claim 1, wherein a longitudinal direction of the first joint portion and a longitudinal direction of the second joint portion are substantially parallel. The traveling machine body is provided with a handle extending rearward,
The walking type work machine according to claim 1 or 2, wherein a longitudinal direction of the first joint part and a longitudinal direction of the second joint part are along a front-rear direction of the traveling machine body. On the surface side of the cover is provided with a linear step portion whose height changes,
The walking work machine according to any one of claims 1 to 3, wherein the first joint portion and the second joint portion are formed so as to overlap the stepped portion in plan view.

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