Support structure for resistance rod and walking type tending machine

Abstract

To provide a resistance rod support structure that facilitates adjustment of position of a resistance rod and attaching and detaching works, and to provide a walking type management machine.SOLUTION: A resistance rod support structure includes: a support part 210 for supporting a resistance rod 100; and an engagement part 240 capable of engaging a part 111 to be engaged which is disposed upward from the support part 210 and formed in the resistance rod 100.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a support structure for a resistance rod and a walk-behind type tiller equipped with the support structure for a resistance rod. [Background technology]

[0002] Conventionally, technology for a support structure for a resistance bar provided in a walk-behind cultivator has been publicly known, for example as described in Patent Document 1.

[0003] Patent Document 1 discloses a resistance rod mounting structure for a tiller that allows the height of the resistance rod to be adjusted. The resistance rod mounting structure includes a locking means for holding the resistance rod inserted into the support cylinder of the handle post. The resistance rod has a plurality of horizontal locking grooves formed at predetermined intervals, and the resistance rod is held at a predetermined height by locking a locking pin of the locking means into the horizontal locking grooves. The resistance rod mounting structure allows the height of the resistance rod to be adjusted and removed by switching between locking and unlocking by the locking pin of the locking means.

[0004] However, in the above resistance rod mounting structure, the locking pin of the locking means is engaged with the horizontal locking groove of the resistance rod through an opening formed in the vertical center of the support cylinder. Therefore, it is difficult for the operator of the tiller to see the engagement part between the locking pin and the resistance rod, which makes it difficult to adjust the position of the resistance rod or to attach and detach it. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 4966914 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made in consideration of the above-mentioned situation, and the problem it aims to solve is to provide a support structure for a resistance rod and a walk-behind type management machine that allows easy adjustment of the position of the resistance rod and easy installation and removal. [Means for solving the problem]

[0007] The problem to be solved by the present invention has been described above, and the means for solving this problem will now be described.

[0008] That is, in claim 1, a support portion that supports a resistance rod, an engagement portion that is disposed above the support portion and is capable of engaging with an engaged portion formed on the resistance rod, A pressing portion that presses the resistance rod toward the engagement portion; and a first biasing portion that biases the pressing portion toward the engagement portion. It is equipped with the following.

[0010] Claim 2 In the embodiment, the pressing portion is disposed below the engaging portion.

[0011] Claim 3 In the above, the pressing portion is supported rotatably relative to the support portion.

[0012] Claim 4 The present invention further comprises a second biasing portion that biases the engaging portion toward the support portion to hold the engaging portion on the support portion.

[0013] Claim 5 In the above, the first urging portion and the second urging portion are configured from the same member.

[0014] Claim 6 The rotary tilling device comprises a drive source, a rotary tilling device driven by the drive force of the drive source, a steering handle, the resistance rod arranged behind the rotary tilling device, and a support structure for the resistance rod according to the present invention. Effect of the Invention

[0015] The present invention has the following advantages.

[0016] In claim 1, the position adjustment and removal of the resistance rod can be easily performed. In addition, wear of the first biasing portion due to friction with the resistance rod can be suppressed.

[0018] Claim 2 In this case, the visibility of the engagement portion can be improved.

[0019] Claim 3 In this case, the position adjustment and removal of the resistance rod can be easily performed.

[0020] Claim 4 In the case of the resistance rod, when a member having a different shape from the resistance rod is provided on the support portion, the engaging portion can be provided so as not to interfere with the member.

[0021] Claim 5 In the above, the pressing portion and the engaging portion are biased by the same member, thereby making it possible to simplify the structure.

[0022] Claim 6 In this case, the visibility of the engagement portion can be improved. [Brief description of the drawings]

[0023] [Figure 1] FIG. 2 is a side view showing a walk-behind cultivator according to one embodiment of the present invention. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. 4 is a side cross-sectional view showing the resistance rod and support structure in use. [Figure 6] FIG. 13 is a side cross-sectional view showing the resistance bar and the support structure in a state where the height position is adjusted. [Figure 7] FIG. 11 is a side view showing a modified example of the support structure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] In the following description, the directions indicated by arrows U, D, F, B, L and R in the figures are defined as upward, downward, forward, backward, leftward and rightward, respectively.

[0025] An embodiment of the present invention will now be described with reference to FIG.

[0026] The walk-behind cultivator 1 comprises a body frame 2, wheels 3, an engine 4, a fuel tank 5, a bonnet 6, a transmission case 7, a rotary tiller 8, a clutch mechanism 9, a handle frame 10, a handle connection portion 11, a steering handle 12, a resistance rod 100 and a support structure 200.

[0027] The vehicle frame 2 shown in Fig. 1 is a member formed by appropriately bending a plate material. The vehicle frame 2 is supported by a pair of left and right wheels 3. An engine 4 is mounted on the vehicle frame 2. A fuel tank 5 is disposed behind the engine 4. The engine 4 and the fuel tank 5 are covered by a bonnet 6.

[0028] The transmission case 7 shown in FIG. 1 is a case that houses a power transmission mechanism (not shown) that transmits power from the engine 4 to the wheels 3 and the rotary tilling device 8. The rotary tilling device 8 is provided at the rear of the transmission case 7. The rotary tilling device 8 has a tilling tine 8a fixed to a rotating shaft. The upper part of the tilling tine 8a is covered with a tilling cover 8b. A leveling plate 8c that levels the ground stirred by the tilling tine 8a is provided at the rear of the tilling cover 8b. The end (upper end) of the leveling plate 8c on the tilling cover 8b side is connected to the tilling cover 8b via a rotating shaft facing in the left-right direction. This allows the leveling plate 8c to be rotated upward when not in use. The clutch mechanism 9 is for switching between rotating and stopping the wheels 3 and the tilling tine 8a.

[0029] As shown in Fig. 1, a handle frame 10 is disposed above the tilling cover 8b. The handle frame 10 is a frame for supporting a steering handle 12. The handle frame 10 is formed so as to extend rearward and upward. The steering handle 12 is attached to the upper rear end of the handle frame 10 via a handle connector 11. The steering handle 12 is provided with switches, levers, etc. for the operator to operate the walk-behind cultivator 1.

[0030] Further, a resistance rod 100 that applies resistance to the travel of the walk-behind cultivator 1 is disposed behind the transmission case 7 and the tiller tines 8a. The resistance rod 100 is supported by a support structure 200 provided on the tiller cover 8b.

[0031] The detailed configuration of the resistance rod 100 and the support structure 200 will be described below with reference to FIGS.

[0032] The resistance rod 100 shown in Figures 2, 4 and 5 comes into contact with the ground and applies resistance to the travel of the walk-behind cultivator 1, thereby adjusting the tilling depth and speed. The resistance rod 100 is formed in a vertically long shape. The resistance rod 100 is formed in a substantially L-shape when viewed from the side. The resistance rod 100 includes a main body 110 and a protrusion 120.

[0033] The main body 110 is the main structure of the resistance rod 100. The main body 110 is formed in a vertically long shape. The main body 110 includes an engaged portion 111.

[0034] The engaged portion 111 shown in Figs. 4 and 5 is a portion that engages with an engaging portion 240 of the support structure 200, which will be described later. The engaged portion 111 is formed in the front portion of the main body portion 110 so as to be recessed rearward. The engaged portion 111 is formed in a substantially semicircular shape in side view. A plurality of engaged portions 111 are provided at intervals in the vertical direction. In this embodiment, six engaged portions 111 are provided. The multiple engaged portions 111 are provided so as to be located at the upper portion of the main body portion 110.

[0035] 1 and 2 protrudes rearward from the lower end of the main body 110. The protrusion 120 is formed in a generally plate shape with the plate surface facing in the up-down direction.

[0036] The shape of the resistance rod 100 is not limited to the above-mentioned example, and various shapes can be adopted as the shape of the resistance rod 100.

[0037] The support structure 200 shown in Figures 2 to 4 supports the resistance rod 100. The support structure 200 supports the resistance rod 100 so that the vertical position of the resistance rod 100 can be adjusted. The support structure 200 is provided on the tilling cover 8b of the rotary tilling device 8. The support structure 200 is disposed behind the transmission case 7 and the tilling tines 8a.

[0038] The support structure 200 can be displaced between a use state (see FIG. 5) in which the engaging portion 240 is engaged with the engaged portion 111 of the resistance rod 100, and a disengaged state (see FIG. 6) in which the engagement between the engaged portion 111 and the engaging portion 240 is released. Below, the configuration of the support structure 200 will be described based on the use state. The support structure 200 includes a support portion 210, a pressing portion 220, a rotating shaft 230, an engaging portion 240, a biasing member 250, and a fastener 260.

[0039] The support part 210 is the main structural member of the support structure 200. The support part 210 is formed in a generally cylindrical shape having an accommodation space 210a that opens in the vertical direction (see Figs. 4 and 5). The main body part 110 of the resistance rod 100 is accommodated in the accommodation space 210a. The accommodation space 210a is formed in a shape capable of accommodating the main body part 110. As shown in Fig. 5, the support part 210 is provided so as to penetrate the tillage cover 8b in the vertical direction. The support part 210 includes a side part 211, a rear side part 212, a front side part 213, a recess 214, and a locking part 215.

[0040] The side surface portion 211 shown in Fig. 2 to Fig. 4 constitutes both the left and right side surfaces of the support portion 210. The side surface portion 211 is formed in a generally plate shape with the plate surface facing in the left-right direction. The side surface portion 211 is formed over the entire support portion 210 in the up-down direction. The side surface portion 211 is formed in a generally rectangular shape that is long in the up-down direction. The side surface portion 211 is provided with an axial hole portion 211a.

[0041] The shaft hole portion 211a shown in Figures 4 and 5 is for inserting a rotating shaft 230 described later. The shaft hole portion 211a is formed so as to penetrate an upper portion of the side surface portion 211 in the left-right direction. More specifically, the shaft hole portion 211a is formed so as to penetrate a portion of the upper portion of the side surface portion 211 that protrudes forward in the left-right direction. As shown in Figure 5, the shaft hole portion 211a is formed at a position that does not overlap with the resistance rod 100 accommodated in the accommodation space 210a in a side view. The shaft hole portion 211a is formed in each of the left and right side surface portions 211.

[0042] The rear side surface portion 212 shown in Figures 5 and 6 constitutes the rear side surface of the support part 210. The rear side surface portion 212 is formed in a generally plate shape with the plate surface facing the front-rear direction. The rear side surface portion 212 is formed in the lower part (generally the lower half) of the support part 210. In other words, the rear side surface portion 212 is not formed in the upper part of the rear part of the support part 210. A rear notch 210b that opens toward the rear is formed in a part above the rear side surface portion 212 (see Figures 4 and 5).

[0043] The front side surface portion 213 shown in Figs. 3 to 6 constitutes the front side surface of the support part 210. The front side surface portion 213 is formed in a generally plate shape with the plate surface facing the front-rear direction. The front side surface portion 213 is formed at the upper end portion of the support part 210. In other words, the front side surface portion 213 is not formed in a portion of the front part of the support part 210 except for the upper end portion. A front notch 210c that opens forward is formed in a portion below the front side surface portion 213 (see Figs. 4 and 5).

[0044] 4 and 5 is a portion recessed toward the rear in the front portion of the upper end portion of the support portion 210. The recess 214 is formed by cutting out the front upper corner portion of the support portion 210 (side surface portion 211 and front side surface portion 213) in a side view. The recess 214 is formed in a substantially arc shape in a side view.

[0045] The locking portion 215 locks the leveling board 8c when not in use. The locking portion 215 is formed at the upper end of the right side surface portion 211 so as to protrude rearward. The protruding tip of the locking portion 215 is formed in a hook shape that is recessed downward. A locked portion (not shown) provided at the tip (lower end) of the leveling board 8c is locked in the hook-shaped portion of the locking portion 215, thereby holding the leveling board 8c in a position when not in use.

[0046] The accommodation space 210a of the support portion 210 as described above is defined by the side surface portion 211, the rear side surface portion 212, and the front side surface portion 213. As shown in Figures 5 and 6, the accommodation space 210a communicates with the rear cutout 210b and the front cutout 210c.

[0047] As shown in Figures 3 to 5, when the resistance rod 100 is accommodated in the accommodation space 210a of the support part 210, both left and right side surfaces of the resistance rod 100 abut against the side surface portions 211 of the support part 210, thereby restricting the left and right movement (rotation) of the resistance rod 100.

[0048] As shown in Fig. 5, the rear and front surfaces of the resistance rod 100 come into contact with the rear side surface portion 212 and the front side surface portion 213 of the support portion 210, thereby restricting the rotation of the resistance rod 100 in a counterclockwise direction as viewed from the left side. This restricts the rotation of the resistance rod 100 due to the force applied to the resistance rod 100 when the walk-behind cultivator 1 is traveling. Here, a rear notch 210b and a front notch 210c are formed in the support portion 210. This allows the resistance rod 100 to rotate clockwise as viewed from the left side (see Figs. 5 and 6).

[0049] 2 to 6 presses the resistance rod 100 housed in the housing space 210a toward the engagement portion 240, which will be described later, by the biasing force of a biasing member 250, which will be described later. The pressing portion 220 is supported by the support portion 210 so as to be rotatable about a rotation shaft 230, which will be described later. The pressing portion 220 is formed in a substantially U-shape with an opening at the front in a plan view. The pressing portion 220 is formed by appropriately bending a substantially plate-shaped member.

[0050] 5, the pressing portion 220 is disposed on the upper portion of the support portion 210 (a portion above the rear side surface portion 212). The pressing portion 220 is disposed so as to cover the support portion 210 and the resistance rod 100 from behind. The pressing portion 220 includes a side surface portion 221 and a rear side surface portion 222.

[0051] The side surface portion 221 constitutes both the left and right side surfaces of the pressing portion 220. The side surface portion 221 is formed in a generally plate shape with the plate surface facing in the left-right direction. As shown in Fig. 3 and Fig. 4, the side surface portion 221 is located outside in the left-right direction of the side surface portion 211 of the support portion 210. The side surface portion 221 is provided with an axis hole portion 221a.

[0052] A pivot shaft 230, which will be described later, is inserted into the shaft hole portion 221a shown in Fig. 4. The shaft hole portion 221a is formed so as to penetrate in the left-right direction through an upper portion of the side surface portion 221. More specifically, the shaft hole portion 221a is formed so as to penetrate in the left-right direction through a portion that protrudes forward at an upper portion of the side surface portion 221. The shaft hole portion 221a is formed so as to overlap with the shaft hole portion 211a of the side surface portion 211 of the support portion 210 in a side view.

[0053] 5 and 6 constitute the rear side surface of the pressing part 220. The rear side surface part 222 is formed in a generally plate shape with the plate surface facing the front-rear direction. As shown in Fig. 5, the rear side surface part 222 is located within the rear cutout 210b. The front surface of the rear side surface part 222 is located on approximately the same plane as the front surface of the rear side surface part 212 of the support part 210.

[0054] 3 to 6 serves as the center of rotation of the pressing portion 220. The rotating shaft 230 is inserted into the shaft hole portion 211a of the support portion 210 and the shaft hole portion 221a of the pressing portion 220. The rotating shaft 230 supports the pressing portion 220 so as to be rotatable with respect to the support portion 210. The rotating shaft 230 includes a shaft portion 231, a head portion 232, and a washer 233.

[0055] 4 is a portion that is inserted into the shaft holes 211a and 221a. The shaft 231 is formed in a substantially cylindrical shape with its axis oriented in the left-right direction.

[0056] Head 232 is a portion that expands in diameter at the left end of shaft portion 231. The outer diameter of head 232 is formed to be larger than the inner diameters of shaft hole portion 211a and shaft hole portion 221a.

[0057] The washer 233 is a portion that expands in diameter at the right end of the shaft portion 231. The outer diameter of the washer 233 is formed to be larger than the inner diameters of the shaft hole portions 211a and 221a. The washer 233 is formed as a separate member from the shaft portion 231 and the head portion 232, and is detachably fixed to the shaft portion 231.

[0058] The engaging portion 240 shown in Figs. 3 to 6 is capable of engaging with the engaged portion 111 of the resistance rod 100 (main body portion 110). The engaging portion 240 is formed in a generally cylindrical shape with its axis oriented in the left-right direction. The outer diameter of the engaging portion 240 is formed according to the inner diameter of the engaged portion 111. The engaging portion 240 is held by the support portion 210 by being urged toward the support portion 210 by the urging force of a urging member 250, which will be described later. More specifically, the engaging portion 240 is urged from the front side so as to abut against the recess 214 of the support portion 210, as shown in Fig. 5.

[0059] The engaging portion 240 is disposed above the supporting portion 210. More specifically, the engaging portion 240 is disposed such that its upper end is located above the upper end of the supporting portion 210. Moreover, a substantially upper half of the engaging portion 240 is located above the upper end of the supporting portion 210. Moreover, the engaging portion 240 is disposed above the pressing portion 220.

[0060] The biasing member 250 shown in Fig. 3 to Fig. 6 biases the pressing portion 220 and the engaging portion 240. The biasing member 250 is provided on the support portion 210 via the rotating shaft 230. The biasing member 250 is a torsion spring formed by appropriately bending a wire. The biasing member 250 is formed in a substantially U-shape that opens upward when viewed from the front. The biasing member 250 includes a coil portion 251, a first biasing portion 252, and a second biasing portion 253.

[0061] Coil portion 251 shown in Fig. 3 to Fig. 5 is a portion formed by winding a wire into a coil shape. Coil portion 251 is disposed so as to surround rotating shaft 230 from the outside. A pair of coil portions 251 are provided on the left and right. The left and right coil portions 251 are located outside side portion 221 of pressing portion 220 in the left-right direction as shown in Fig. 3.

[0062] The first biasing portion 252 is a portion that biases the pressing portion 220 counterclockwise in a left side view. The first biasing portion 252 has extending portions 252a extending downward from the left and right coil portions 251, respectively, and a connecting portion 252b that connects the lower ends of the extending portions 252a to each other.

[0063] The first biasing portion 252 presses the front end portion of the lower portion of the pressing portion 220 (the portion below the shaft hole portion 221a) backward by the biasing force of the coil portion 251 through the connecting portion 252b. The pressing portion 220 to which the biasing force is applied rotates counterclockwise as viewed from the left side with the rotating shaft 230 as the rotation center, and presses the resistance rod 100 toward the engaging portion 240. In this way, the first biasing portion 252 biases the pressing portion 220 toward the engaging portion 240.

[0064] The second urging portion 253 is a portion that urges the engaging portion 240 toward the support portion 210. The second urging portions 253 are formed so as to extend upward from the left and right coil portions 251, respectively. That is, a pair of second urging portions 253 are formed on the left and right. The second urging portions 253 have an insertion portion 253a.

[0065] The insertion portion 253a is a portion through which the engaging portion 240 is inserted. The insertion portion 253a is formed in a ring shape surrounding the engaging portion 240 from the outside. The engaging portion 240 inserted into the insertion portion 253a is supported by the support portion 210 via the biasing member 250 and the rotating shaft 230. A predetermined stopper is provided on the outer periphery of the engaging portion 240 to prevent the engaging portion 240 from coming off the insertion portion 253a.

[0066] The second biasing portion 253 biases the engaging portion 240 inserted into the insertion portion 253a so as to press the engaging portion 240 against the recessed portion 214 of the support portion 210. As a result, the engaging portion 240 is held by the support portion 210.

[0067] The fastener 260 shown in Fig. 2 is for attaching various attachments (not shown) different from the resistance rod 100 to the support part 210. The fastener 260 has a predetermined bolt for fixing the attachment to the support part 210 by fastening, a predetermined lever used for the fastening operation, etc. The fastener 260 is provided on the right side part 211 of the support part 210. Note that the fastener 260 is not shown in Figs. 3 to 6. The fastener 260 allows the attachment to be provided in place of the resistance rod 100 or together with the resistance rod 100.

[0068] As the attachment, various members that are used in the work by the walk-behind type cultivator 1 can be adopted. The attachment can be attached to the support part 210 not only by the fastener 260 but also by the same method as the resistance rod 100.

[0069] The operation of adjusting the vertical position of the resistance rod 100 using the support structure 200 as described above will be described below.

[0070] Fig. 5 shows the support structure 200 and the resistance rod 100 in use. In this state, the engaged portion 111 of the resistance rod 100 is engaged with the engaging portion 240. In the example shown in Fig. 5, the engaging portion 240 is engaged with the uppermost engaged portion 111 among the multiple engaged portions 111. By engaging the engaging portion 240 with the engaged portion 111, the movement of the resistance rod 100 in the up and down direction (movement along the accommodation space 210a) is restricted.

[0071] The resistance rod 100 is biased toward the engaging portion 240 by the biasing force of the biasing member 250 (first biasing portion 252) via the pressing portion 220. More specifically, a biasing force in a counterclockwise direction as viewed from the left side is applied to the pressing portion 220 by the biasing force of the biasing member 250 (first biasing portion 252) about the rotation axis 230 as a rotation center. When the rear side surface portion 222 of the pressing portion 220 abuts against the rear surface of the resistance rod 100, the resistance rod 100 is constantly biased in a direction in which the engaged portion 111 engages with the engaging portion 240.

[0072] In this way, in the use state, the resistance rod 100 is pressed by the pressing portion 220 in the direction in which the engaged portion 111 engages with the engaging portion 240. This makes it difficult for the engagement between the resistance rod 100 (engaged portion 111) and the engaging portion 240 to be released, and prevents the engagement from being released at an unintended timing, such as during work.

[0073] When adjusting the position or removing or attaching the resistance rod 100 as described above, the operator holds the upper part of the resistance rod 100 and tilts it backward to displace the support structure 200 from the in-use state to the disengaged state.

[0074] 6, the support structure 200 in the use state can be displaced to the disengaged state by moving (rotating) the resistance rod 100 so as to tilt clockwise when viewed from the left side against the biasing force applied via the pressing portion 220. In this state, the engagement between the resistance rod 100 (engaged portion 111) and the engaging portion 240 is released.

[0075] At this time, the rotation of the pressing part 220 can guide the resistance rod 100 to tilt. This can regulate the direction of movement of the resistance rod 100 (prevent it from moving in an unintended direction). In addition, the lower part of the rear side surface part 222 of the pressing part 220 abuts against the rear notch 210b of the support part 210, so that the rotation of the pressing part 220 beyond a predetermined amount is restricted (see FIG. 6). In the disengaged state, the resistance rod 100 can be moved up and down along the rear side surface part 222 of the pressing part 220 while being tilted.

[0076] Next, with the resistance rod 100 positioned at the desired vertical position, the resistance rod 100 is rotated counterclockwise as viewed from the left side, and the support structure 200 is shifted to the use state again so that the engaging portion 240 engages with any of the engaged portions 111 (see FIG. 5). This adjusts the vertical position of the resistance rod 100. At this time, the operator can rotate the resistance rod 100 while visually checking the engagement of the engaged portion 111 with the engaging portion 240. At this time, the pressing portion 220 rotates counterclockwise as viewed from the left side due to the biasing force of the biasing member 250 (first biasing portion 252) as the resistance rod 100 rotates. In this way, the operation of adjusting the vertical position of the resistance rod 100 is completed.

[0077] In addition, when the support structure 200 is displaced to the disengaged state, not only can the position of the resistance rod 100 be adjusted, but also the resistance rod 100 can be attached to and detached from the support structure 200. Furthermore, the support portion 210 of the support structure 200 can support not only the resistance rod 100, but also other attachments different from the resistance rod 100.

[0078] According to the support structure 200 as described above, the position of the resistance rod 100 can be easily adjusted and the work of attaching and detaching can be performed. That is, by arranging the engaging part 240 above the support part 210, the visibility of the engaging part 240 can be improved. This makes it easy to engage and disengage the engaged part 111 of the resistance rod 100 with the engaging part 240, and thus makes it easy to adjust the position of the resistance rod 100 and the work of attaching and detaching it.

[0079] Furthermore, if soil or the like becomes caught between the engaged portion 111 and the engaging portion 240, there is a risk that the engagement between the engaged portion 111 and the engaging portion 240 will become insufficient. According to this embodiment, since the engaging portion 240 can be easily viewed, it is possible to easily visually check whether soil or the like has become caught.

[0080] As described above, the support structure 200 for the resistance rod 100 according to this embodiment has the following features: A support portion 210 that supports the resistance rod 100; An engaging portion 240 that is disposed above the support portion 210 and is engageable with the engaged portion 111 formed on the resistance rod 100; It is equipped with the following.

[0081] This configuration allows easy position adjustment and removal of the resistance rod 100. That is, by locating the engagement portion 240 engageable with the resistance rod 100 above the support portion 210 that supports the resistance rod 100, the visibility of the engagement portion 240 can be improved. This allows easy engagement and release of the engagement between the resistance rod 100 (engaged portion 111) and the engagement portion 240, and thus allows easy position adjustment and removal of the resistance rod 100.

[0082] In addition, the support structure 200 for the resistance rod 100 is A pressing portion 220 that presses the resistance rod 100 toward the engagement portion 240; a first biasing portion 252 that biases the pressing portion 220 toward the engagement portion 240; It is equipped with the following.

[0083] With this configuration, the engagement between the resistance rod 100 (engaged portion 111) and the engaging portion 240 can be made difficult to be released, and the engagement can be prevented from being released at an unintended timing, such as during work. In addition, since the first urging portion 252 does not come into direct contact with the resistance rod 100, which may move during position adjustment, etc., wear of the first urging portion 252 due to friction with the resistance rod 100 can be prevented.

[0084] In addition, the pressing portion 220 is It is disposed below the engaging portion 240 .

[0085] With this configuration, by disposing the pressing portion 220 below the engaging portion 240, the visibility of the engaging portion 240 can be improved.

[0086] In this embodiment, the holding portion 220 is disposed rearward (toward the operator) of the engaging portion 240. In the support structure 200 configured in this manner, by disposing the holding portion 220 below the engaging portion 240, it is possible to prevent the holding portion 220 from blocking the operator's view when the operator visually checks the engaging portion 240 from behind.

[0087] In addition, the pressing portion 220 is It is supported rotatably relative to the support portion 210 .

[0088] With this configuration, when adjusting the position of the resistance rod 100 or attaching / detaching it, the rotation of the pressing part 220 can guide the resistance rod 100 to tilt. This allows the movement direction of the resistance rod 100 to be regulated (preventing it from moving in an unintended direction), making it easy to adjust the position of the resistance rod 100 or to attach / detach it. In addition, since the operator can adjust the position by simply manipulating the resistance rod 100, it becomes possible to work with one hand, for example, and to easily adjust the position.

[0089] In addition, the support structure 200 for the resistance rod 100 is The second biasing portion 253 biases the engaging portion 240 toward the supporting portion 210 to hold the engaging portion 240 on the supporting portion 210 .

[0090] With this configuration, the engaging portion 240 can be moved away from the supporting portion 210 against the biasing force of the second biasing portion 253. This allows the engaging portion 240 to be moved away from the supporting portion 210 so as not to interfere with a member having a different shape from the resistance rod 100 (for example, another attachment, etc.) when the supporting portion 210 is provided with the member.

[0091] Moreover, the first urging portion 252 and the second urging portion 253 are configured from the same member.

[0092] With this configuration, the pressing portion 220 and the engaging portion 240 are biased by the same member (biasing member 250), thereby simplifying the configuration.

[0093] In addition, the walking type management machine 1 according to this embodiment is A driving source (engine 4), A rotary tilling device 8 driven by the driving force of the driving source (engine 4); A control handle 12; The resistance rod 100 is disposed behind the rotary tilling device 8; A support structure 200 for the resistance rod 100 according to this embodiment; It is equipped with the following.

[0094] With this configuration, the engagement portion 240 that can engage with the resistance rod 100 is disposed above the support portion 210 that supports the resistance rod 100, thereby improving the visibility of the engagement portion 240.

[0095] The support structure 200 according to this embodiment is one embodiment of a support structure for a resistance rod. Moreover, the engine 4 according to this embodiment is one form of a drive source.

[0096] Although the embodiment of the present invention has been described above, the present invention is not limited to the above configuration, and various modifications are possible within the scope of the invention described in the claims.

[0097] For example, in the present embodiment, the first urging portion 252 and the second urging portion 253 are configured by the same member (the urging member 250), but are not limited to this aspect. For example, the first urging portion 252 and the second urging portion 253 may be separate members.

[0098] In addition, in the present embodiment, the engaging portion 240 is held on the supporting portion 210 by the biasing force of the second biasing portion 253 (biasing member 250), but the present invention is not limited to this. For example, the engaging portion 240 may be fixed to the supporting portion 210 so as not to be detachable.

[0099] In the present embodiment, the biasing member 250 (the first biasing portion 252 and the second biasing portion 253) is a torsion spring, but the present invention is not limited to this. For example, other springs may be used as in the modified example shown in FIG.

[0100] In the modified example shown in FIG. 7, a tension spring, which is a biasing member 250A, is used to bias the pressing portion 220 counterclockwise as viewed from the left side. In this modified example, the pressing portion 220 is biased by a pair of biasing members 250A provided to be positioned on both the left and right sides of the pressing portion 220. Note that FIG. 7 illustrates only one (left side) of the pair of biasing members 250A. Also, in FIG. 7, for ease of explanation, some members (such as a first locking portion 216 and a second locking portion 221b described later) are hatched.

[0101] One end of the biasing member 250A is engaged with a first locking portion 216 provided on the support portion 210. The first locking portion 216 is formed in a generally cylindrical shape with its axis oriented in the left-right direction. The first locking portion 216 is provided on an upper portion (below the front side surface portion 213) in the front portion of the support portion 210. The first locking portion 216 is provided such that both left and right ends protrude in the left-right direction relative to the side surface portion 211. The first locking portion 216 is fixed to the support portion 210 by, for example, welding.

[0102] The other end of the biasing member 250A is locked to a second locking portion 221b provided on the pressing portion 220. The second locking portion 221b is formed in a generally cylindrical shape protruding in the left-right direction from an upper portion (upper rear portion) of the side surface portion 221. The second locking portion 221b is provided on each of the left and right side surface portions 221.

[0103] The pair of biasing members 250A are respectively engaged with the left and right ends of the first locking portion 216 and the left and right second locking portions 221b, thereby connecting the first locking portion 216 and the second locking portion 221b. Appropriate stoppers for preventing the biasing members 250A from falling off can be attached to the first locking portion 216 and the second locking portion 221b.

[0104] According to the above-described modified example, the upper portion of the pressing portion 220 can be pulled forward by the biasing force of the biasing member 250A. This makes it possible to bias the pressing portion 220 so as to press the resistance rod 100 toward the engagement portion 240.

[0105] In this modified example, the engagement portion 240 is directly fixed to the support portion 210 without the intervention of the biasing member 250 (second biasing portion 253). The above-mentioned fixing method can be, for example, welding.

[0106] The attachment location of the urging member 250A is not limited to the above example, and various locations capable of urging the pressing portion 220 can be employed. For example, in the above modified example, an example has been shown in which one end of the urging member 250A is locked to the first locking portion 216, but instead of the above embodiment, one end of the urging member 250A may be locked to the engagement portion 240. In this case, the first locking portion 216 may not be provided.

[0107] In addition, in the above modified example, an example was shown in which a pair of biasing members 250A are provided to be located on both the left and right sides of the pressing portion 220. However, instead of the above embodiment, one biasing member 250A may be provided on either the left or right side of the pressing portion 220.

[0108] In the above modified example, the pressing portion 220 is biased by using the biasing member 250A, which is a tension spring, but instead of the above embodiment, for example, a compression spring may be used to bias the pressing portion 220. In this case, for example, a configuration can be adopted in which an appropriate portion of the support portion 210 and the lower portion of the pressing portion 220 are connected by a compression spring so as to press the lower portion of the pressing portion 220 rearward.

[0109] In the above modified example, the biasing member 250A is provided instead of the biasing member 250. However, the present invention is not limited to this embodiment. In addition to the biasing member 250, the biasing member 250A may be provided.

[0110] Moreover, the biasing members 250 and 250A are not limited to the above-mentioned examples, and various members capable of biasing the pressing portion 220, such as a leaf spring or an air spring, can be used.

[0111] In addition, in the present embodiment, an example has been shown in which the pressing portion 220 is provided rotatably with respect to the support portion 210, but the present invention is not limited to this. For example, the pressing portion 220 may be provided so as to be slidable back and forth.

[0112] In the present embodiment, the pressing portion 220 is disposed below the engaging portion 240, but the present invention is not limited to this. For example, the pressing portion 220 may be disposed at the same height as the engaging portion 240 or above the engaging portion 240.

[0113] In addition, in the present embodiment, an example is shown in which the pressing portion 220 is provided to press the resistance rod 100 against the engagement portion 240, but the present invention is not limited to this. For example, the pressing portion 220 does not have to be provided. In this case, for example, the resistance rod 100 may be directly pressed by the pressing member 250.

[0114] In addition, in the present embodiment, the engine 4 is used as the drive source for driving the wheels 3 and the rotary tilling device 8, but the present invention is not limited to this. For example, a motor or the like can be used as the drive source. [Explanation of symbols]

[0115] 1. Walk-behind cultivator 100 resistance rod 200 Support structure

Claims

1. A support portion that supports the resistance rod; an engaging portion that is disposed above the support portion and is engageable with an engaged portion formed on the resistance bar; a pressing portion that presses the resistance rod toward the engagement portion; a first biasing portion that biases the pressing portion toward the engaging portion; A support structure for a resistance rod comprising:

2. The holding portion is Located below the engagement portion, The support structure for a resistance rod according to claim 1.

3. The holding portion is The support portion is rotatably supported by the support portion. The support structure for a resistance rod according to claim 1 or 2.

4. A second biasing portion that biases the engaging portion toward the support portion to hold the engaging portion on the support portion. A support structure for a resistance rod according to any one of claims 1 to 3.

5. The first biasing portion and the second biasing portion are composed of the same member. The support structure for a resistance rod according to claim 4.

6. A drive source; A rotary tilling device driven by the driving force of the driving source; A steering wheel, The resistance rod disposed behind the rotary tilling device; A support structure for a resistance rod according to any one of claims 1 to 5, A walking type management machine equipped with:

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