Tail wheel mounting mechanism and walking type management machine equipped with the same

Abstract

To provide an attachment mechanism of a tail wheel capable of improving workability and a walking type management device including the same.SOLUTION: An attachment mechanism includes: a support part 110 that supports a tail wheel and can be attached to a first attachment part 13b provided in a walking type management device; and a holding part 120 that is provided so as to be swingable with respect to the support part 110, and can switch between a holding position that holds the support part 110 with respect to the attachment part and a release position that releases holding of the support part 110 with respect to the attachment part, by swinging with respect to the support part 110.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a mounting mechanism for a tail wheel and a technology for a walking type management machine equipped with the same.

Background Art

[0002] Conventionally, a technology for a mounting mechanism capable of changing the mounting position of a tail wheel has been known. For example, it is as described in Patent Document 1.

[0003] Patent Document 1 discloses a technology that enables the mounting position of a tail wheel to be changed by rotatably mounting a rotating frame that supports the tail wheel to the main body (supporting portion) of a walking type management machine. Specifically, the rotating frame is rotatably supported by the supporting portion by being inserted into the supporting portion. Further, by attaching a pin so as to penetrate the supporting portion and the rotating frame, the rotation of the rotating frame is restricted, and the posture of the rotating frame can be held at a fixed position.

[0004] In such a walking type management machine, the rotating frame can be rotated with respect to the supporting portion by removing the pin. In this state, the rotating frame can be rotated to an arbitrary position and the pin can be attached again, thereby changing the position of the rotating frame (and thus the position of the tail wheel).

[0005] However, in the technology described in Patent Document 1, when performing the operation of changing the mounting position of the tail wheel, the operation of attaching and detaching the pin is complicated, and there is a risk of losing the removed pin, etc., so there is room for improvement in workability.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] One aspect of the present disclosure has been made in view of the above situations, and the problem to be solved is to provide an attachment mechanism for a trailing wheel capable of improving workability, and a walking type management machine equipped with the same.

Means for Solving the Problem

[0008] The problem to be solved in one aspect of the present disclosure is as described above. Next, means for solving this problem will be described.

[0009] The attachment mechanism for a trailing wheel according to one aspect of the present disclosure includes a support portion that supports the trailing wheel and is attachable to an attachment portion provided on a walking type management machine, and a holding portion that is provided swingably with respect to the support portion and can be switched between a holding position where the support portion is held with respect to the attachment portion and a release position where the holding of the support portion with respect to the attachment portion is released by swinging with respect to the support portion. Moreover, the support portion includes a base portion and a first insertion portion that protrudes from the base portion in a first direction and is insertable into the attachment portion. The holding portion holds the first insertion portion inserted into the attachment portion at the holding position. The holding portion includes a first restricting portion that prevents the first insertion portion from coming out of the attachment portion by being located on the side opposite to the base portion with the attachment portion therebetween at the holding position. is as follows. According to one aspect of the present disclosure, workability when changing the attachment position of the trailing wheel can be improved. Also, according to one aspect of the present disclosure, it is possible to prevent the support portion from falling off by holding the first insertion portion in a state of being inserted into the attachment portion. Also, according to one aspect of the present disclosure, the first insertion portion can be held in a state of being inserted into the attachment portion with a simple configuration.

[0010] Further, the attachment mechanism for a trailing wheel according to one aspect of the present disclosure A support portion that supports a tail ring and can be attached to an attachment portion provided on a walking type management machine, and a holding portion that is swingably provided with respect to the support portion and switches between a holding position where the support portion is held with respect to the attachment portion by swinging with respect to the support portion and a release position where the holding of the support portion with respect to the attachment portion is released. The support portion includes a base portion and a first insertion portion that protrudes from the base portion in a first direction and is insertable into the attachment portion. The holding portion holds the first insertion portion inserted into the attachment portion at the holding position. The support portion protrudes in a second direction different from the first direction and includes a second insertion portion that is insertable into the attachment portion. The holding portion holds the second insertion portion inserted into the attachment portion at the holding position. is as follows. According to one aspect of the present disclosure, It is possible to improve the workability when changing the attachment position of the tail ring. Also, according to one aspect of the present disclosure, it is possible to prevent the support portion from falling off by holding the first insertion portion in a state of being inserted into the attachment portion. Also, it is possible to prevent the support portion from falling off by holding the second insertion portion in a state of being inserted into the attachment portion. Also, by using the second insertion portion that protrudes in a direction different from the first insertion portion, the tail ring can be attached in a direction different from the case of using the first insertion portion.

[0011] Further, in the attachment mechanism for a trailing wheel according to one aspect of the present disclosure, The holding portion includes a second restricting portion that prevents the second insertion portion from coming out of the attachment portion by being located on the side opposite to the base portion with the attachment portion therebetween at the holding position. According to one aspect of the present disclosure, The second insertion portion can be held in a state of being inserted into the attachment portion with a simple configuration.

[0012] Further, in the attachment mechanism for a trailing wheel according to one aspect of the present disclosure, At least one of the first insertion portion and the second insertion portion positions the holding portion by coming into contact with the holding portion. According to one aspect of the present disclosure, The holding portion can be positioned using the first insertion portion or the second insertion portion. As a result, a member can be used in common, and the structure can be simplified.

[0013] Further, the attachment mechanism for a trailing wheel according to one aspect of the present disclosure It includes a biasing portion that biases the holding portion toward the holding position. According to one aspect of the present disclosure, It is possible to prevent the support portion from falling off. Further, it is possible to easily switch the holding portion to the holding position.

[0016] Further, in the attachment mechanism of the trailing wheel according to one aspect of the present disclosure, the holding portion includes an operable operation portion, and the support portion includes an surrounding portion formed so as to surround the movable range of the operation portion. According to one aspect of the present disclosure, it is possible to suppress the intrusion of foreign matter into the movable range of the operation portion.

[0017] Further, the walking-type management machine according to one aspect of the present disclosure includes the attachment mechanism of the trailing wheel. According to one aspect of the present disclosure, it is possible to improve the workability when changing the attachment position of the trailing wheel.

[0018] Further, in the walking-type management machine according to one aspect of the present disclosure, the attachment portion is formed at a plurality of locations on a resistance bar provided on the walking-type management machine. According to one aspect of the present disclosure, it is possible to attach the trailing wheel to a plurality of locations on the resistance bar.

Effects of the Invention

[0019] According to one aspect of the present disclosure, it is possible to improve the workability when changing the attachment position of the trailing wheel.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

MODE FOR CARRYING OUT THE INVENTION

[0021] Hereinafter, the directions indicated by the arrows U, D, F, B, L, and R in the figure will be defined as the upward direction, downward direction, forward direction, backward direction, left direction, and right direction, respectively, for the description.

[0022] Hereinafter, with reference to FIG. 1, an embodiment of the present invention will be described.

[0023] The walking type management machine 1 includes a body frame 2, wheels 3, an engine 4, a fuel tank 5, a bonnet 6, a transmission case 7, a rotary tilling device 8, a clutch mechanism 9, a handle frame 10, a handle connecting portion 11, a steering handle 12, a resistance bar 13, a support portion 14, and a tail wheel 15.

[0024] The body frame 2 is a member formed by appropriately bending a plate material. The body frame 2 is supported by a pair of left and right wheels 3. The engine 4 is placed on the body frame 2. The fuel tank 5 is arranged behind the engine 4. The engine 4 and the fuel tank 5 are covered by the bonnet 6.

[0025] The transmission case 7 is a case that houses a power transmission mechanism (not shown) for transmitting the power from the engine 4 to the wheels 3 and the rotary tilling device 8. A rotary tilling device 8 is provided at the rear part of the transmission case 7. The rotary tilling device 8 has tilling claws 8a fixed to a rotating shaft. The upper part of the tilling claws 8a is covered by a tilling cover 8b. The clutch mechanism 9 is for switching the rotation and the stop of the wheels 3 and the tilling claws 8a.

[0026] Above the tilling cover 8b, a handle frame 10 is arranged. The handle frame 10 is a frame for supporting the steering handle 12. The handle frame 10 is formed to extend rearward and upward. At the rear upper end of the handle frame 10, the steering handle 12 is attached via a handle connecting portion 11. On the steering handle 12, switches, levers, etc. for an operator to operate the walking type management machine 1 are provided.

[0027] Also, behind the transmission case 7 and the tilling claws 8a, a resistance rod 13 for applying resistance to the running of the walking type management machine 1 is arranged. The resistance rod 13 is supported by a cylindrical support portion 14 provided on the tilling cover 8b. The support portion 14 is fixed to the tilling cover 8b with its longitudinal direction facing up and down. The resistance rod 13 is fixed in a state of being inserted through the support portion 14. The vertical position of the resistance rod 13 with respect to the support portion 14 is arbitrarily adjustable.

[0028] A tail wheel 15 can be attached to the resistance rod 13 via an attachment mechanism 100. By attaching the tail wheel 15 to the lower part of the resistance rod 13, the tail wheel 15 can be used when running the walking type management machine 1. Also, when the tail wheel 15 is not used, the tail wheel 15 can be attached to the upper part of the resistance rod 13 (see Figure 2).

[0029] Hereinafter, the specific configuration of the attachment mechanism 100 will be described.

[0030] The attachment mechanism 100 shown in FIGS. 3 to 5 mainly includes a support portion 110, a holding portion 120, a connecting shaft 130, and a biasing portion 140.

[0031] The support portion 110 shown in FIGS. 4 to 6 is a member that supports the tail wheel 15 and can be attached to the resistance rod 13. The support portion 110 mainly includes a base portion 111, a support arm 112, a support plate 113, a first insertion portion 114, a second insertion portion 115, and a stopper 116.

[0032] The base portion 111 is a portion to which a support arm 112, a support plate 113, etc. described later are attached. The base portion 111 is formed in a substantially rectangular flat plate shape.

[0033] The support arm 112 is a portion that supports the tail ring 15. The support arm 112 is formed of a long plate material. The front end portion of the support arm 112 is bent in an L shape in plan view. Specifically, the front end of the support arm 112 with the thickness direction facing left and right is bent to the right. Hereinafter, the bent portion of the front end of the support arm 112 is referred to as the bent portion 112a. The front end portion of the support arm 112 is fixed to the upper surface of the base portion 111. The support arm 112 is formed so as to extend rearward and upward from the base portion 111. A support shaft 112b for rotatably supporting the tail ring 15 is provided at the rear end portion of the support arm 112.

[0034] The support plate 113, together with the support arm 112, is a portion that supports a holding portion 120 described later. The support plate 113 is formed in a substantially rectangular flat plate shape. The support plate 113 is disposed behind the bent portion 112a of the support arm 112 with the thickness direction facing forward and backward. The left end of the support plate 113 is disposed so as to be in contact with the support arm 112. The support plate 113 is fixed to the rear end of the base portion 111.

[0035] By arranging the support arm 112 and the support plate 113 in this way, an approximately U-shaped frame (the portion indicated by the dashed line in FIG. 6) that surrounds the movable range of an operation portion 123 described later in the front-rear and left directions in plan view is formed above the base portion 111. Hereinafter, this frame portion is referred to as the surrounding portion 117.

[0036] The first insertion portion 114 is a portion through which the resistance rod 13 can be inserted. The first insertion portion 114 is formed in a substantially cylindrical shape. The first insertion portion 114 is provided so as to protrude downward from the base portion 111. In the present embodiment, an example in which a headed pin is used as the first insertion portion 114 is illustrated. The first insertion portion 114 is fixed to the base portion 111 in a state of being inserted into the base portion 111 from above.

[0037] The second insertion part 115 is a part that can be inserted into the resistance bar 13. The second insertion part 115 is formed in a substantially cylindrical shape. The second insertion part 115 is provided so as to protrude laterally (to the right in this embodiment) from the base part 111. Specifically, the second insertion part 115 is fixed to the upper surface of the base part 111 with its axial direction oriented left and right. The right end of the second insertion part 115 is arranged so as to protrude to the right from the base part 111. Thus, the second insertion part 115 is arranged so as to protrude in a direction different from that of the first insertion part 114 (more specifically, a direction orthogonal to the first insertion part 114).

[0038] The stopper 116 shown in FIGS. 5 and 6 restricts the swing range of the holding part 120 described later. The stopper 116 is formed in a flat plate shape and fixed to the rear side surface of the support plate 113. The shape of the stopper 116 can be appropriately determined according to the shape and swing range of the holding part 120. In this embodiment, an example in which the stopper 116 is formed in a substantially rectangular plate shape is illustrated.

[0039] The holding part 120 shown in FIGS. 4 to 6 is a member that can hold the support part 110 in a state of being attached to the resistance bar 13. The holding part 120 mainly includes a main body part 121, a regulating arm 122, and an operating part 123.

[0040] The main body part 121 is a part that forms the main structure of the holding part 120. The main body part 121 is formed in a substantially U shape in plan view. The main body part 121 is formed by bending the front and rear ends of a flat plate with its thickness direction oriented left and right to the left respectively. Hereinafter, among the main body part 121, the front and rear central parts are referred to as the central part 121a, and the bent parts at the front and rear ends are referred to as the front-side bent part 121b and the rear-side bent part 121c respectively. The front and rear intervals between the front-side bent part 121b and the rear-side bent part 121c are formed slightly larger than the front and rear widths of the surrounding part 117 of the support part 110 (see FIG. 6).

[0041] As shown in FIGS. 4, 5, and 7, an engaging recess 121d is formed in the central portion 121a of the main body portion 121. The engaging recess 121d is a portion that can engage with the second insertion portion 115 of the support portion 110. The engaging recess 121d is formed so as to notch the lower end portion of the central portion 121a upward.

[0042] The regulating arm 122 is a portion that regulates the detachment of the support portion 110 attached to the resistance bar 13. The regulating arm 122 is formed in a substantially L shape when viewed from the front by bending the lower end portion of a substantially columnar member extending vertically to the left. The regulating arm 122 is fixed to the front bent portion 121b so as to protrude downward from the main body portion 121.

[0043] The operation portion 123 shown in FIGS. 4 to 7 is a portion that is operated by an operator when swinging the holding portion 120. The operation portion 123 is formed so as to protrude leftward from the upper end portion of the main body portion 121 (central portion 121a). Specifically, the operation portion 123 is formed by bending a plate-like portion integrally formed with the central portion 121a to the left and attaching a cover formed of resin or the like to the portion.

[0044] The connecting shaft 130 is a member that connects the holding portion 120 to be swingable with respect to the support portion 110. The connecting shaft 130 is formed in a substantially columnar shape. In the present embodiment, an example using a headed pin as the connecting shaft 130 is illustrated.

[0045] As shown in FIG. 6 and the like, with the holding portion 120 arranged so that the surrounding portion 117 of the support portion 110 is sandwiched from the front and rear by the front bent portion 121b and the rear bent portion 121c, the connecting shaft 130 is arranged so as to penetrate the support portion 110 and the holding portion 120 in the front-rear direction. The connecting shaft 130 is provided with a stopper (such as a pin) for preventing detachment from the support portion 110 and the holding portion 120. Thereby, the holding portion 120 is provided so as to be swingable with respect to the support portion 110 around the connecting shaft 130.

[0046] The biasing portion 140 shown in FIGS. 4 to 6 biases the holding portion 120 in one direction. The biasing portion 140 is formed by a torsion coil spring. The biasing portion 140 is disposed in a state of being inserted through the connecting shaft 130. One end of the biasing portion 140 is locked to the upper end of the rear bent portion 121c of the holding portion 120. The biasing portion 140 biases the holding portion 120 in the clockwise direction in a front view by biasing so as to push down the rear bent portion 121c.

[0047] When the holding portion 120 swings in the clockwise direction in a front view to a predetermined position, as shown in FIG. 7, the second insertion portion 115 abuts (engages) against the engaging concave portion 121d, thereby restricting the swinging of the holding portion 120. That is, the position of the holding portion 120 can be positioned by the second insertion portion 115. Hereinafter, the swinging position of the holding portion 120 where the second insertion portion 115 engages with the engaging concave portion 121d is referred to as the "holding position".

[0048] By using the mounting mechanism 100 configured as described above, the tail ring 15 can be mounted on the lower part or the upper part of the resistance bar 13. Hereinafter, the configuration of the resistance bar 13 on which the tail ring 15 is mounted will be described.

[0049] The resistance bar 13 shown in FIGS. 2 to 4 mainly includes a main body portion 13a, a first mounting portion 13b, and a second mounting portion 13c.

[0050] The main body portion 13a is a portion that forms the main structure of the resistance bar 13. The main body portion 13a is formed in a substantially rectangular plate shape that is long in the vertical direction. The main body portion 13a can be inserted through the support portion 14 with the thickness direction facing left and right.

[0051] The first mounting portion 13b is a portion for mounting the tail ring 15 (mounting mechanism 100) on the lower part of the resistance bar 13. The first mounting portion 13b is formed in a plate shape with the thickness direction facing up and down. The first mounting portion 13b is provided so as to protrude rearward from the vicinity of the lower end of the resistance bar 13. A first through hole 13d used when mounting the mounting mechanism 100 is formed in the first mounting portion 13b.

[0052] The second attachment portion 13c shown in FIG. 2 is a portion for attaching the tail ring 15 (attachment mechanism 100) to the upper portion of the resistance rod 13. In the present embodiment, the second attachment portion 13c is formed by the upper end portion of the main body portion 13a. A second through hole 13e used when attaching the attachment mechanism 100 is formed in the second attachment portion 13c.

[0053] Hereinafter, a method of attaching and detaching the tail ring 15 to and from the resistance rod 13 by the attachment mechanism 100 will be described.

[0054] FIGS. 3, 6, and 7 show a state in which the attachment mechanism 100 is attached to the first attachment portion 13b. In this state, the base portion 111 of the support portion 110 is placed on the first attachment portion 13b, and the first insertion portion 114 is inserted into the first through hole 13d.

[0055] Also in this state, the holding portion 120 is located at the holding position, and the lower end portion of the restricting arm 122 is located below the first attachment portion 13b. In this way, by positioning the restricting arm 122 on the opposite side of the base portion 111 with the first attachment portion 13b interposed therebetween, it is possible to prevent the first insertion portion 114 from coming out of the first through hole 13d.

[0056] When the attachment mechanism 100 is attached to the first attachment portion 13b, as shown in FIG. 2, the tail ring 15 is located near the lower end portion of the resistance rod 13 (that is, near the ground). Using the tail ring 15 arranged in this way, the walking type management machine 1 can be made to travel or the like.

[0057] When the tail ring 15 is not used, the tail ring 15 (attachment mechanism 100) can be removed from the first attachment portion 13b. When removing the attachment mechanism 100 from the first attachment portion 13b, as shown in FIG. 8, the operator operates so as to push the operation portion 123 downward.

[0058] At this time, the operation unit 123 will move so as to sink inside the surrounding unit 117 (see FIG. 6). In other words, at least a part of the movable range of the operation unit 123 is surrounded by the surrounding unit 117. By surrounding the movable range of the operation unit 123 in this way, it is possible to suppress the intrusion of foreign matters (such as stones) into the movable range of the operation unit 123.

[0059] As shown in FIG. 8, by operating the operation unit 123, the holding unit 120 swings counterclockwise in a front view, and the restricting arm 122 moves to the outside (rightward in the illustrated example) of the first mounting portion 13b. In this state, by lifting the mounting mechanism 100 upward, the mounting mechanism 100 can be removed from the first mounting portion 13b. Hereinafter, the swinging position of the holding unit 120 (the position where the holding of the support unit 110 is released) at which the mounting mechanism 100 can be removed is referred to as the "release position".

[0060] When the operation unit 123 is operated to a certain extent, the rear bending portion 121c abuts against the stopper 116 (see FIG. 5), and the swinging of the holding unit 120 is restricted. Thereby, excessive operation of the operation unit 123 can be prevented.

[0061] The tail ring 15 removed from the first mounting portion 13b can be attached to the upper portion (second mounting portion 13c) of the resistance rod 13. When attaching the tail ring 15 (mounting mechanism 100) to the second mounting portion 13c, the operator operates so as to push the operation unit 123 downward and switches the holding unit 120 to the release position (see FIG. 8).

[0062] In this state, as shown in FIG. 9, the second insertion portion 115 is inserted into the second through hole 13e of the second mounting portion 13c. When the operation of the operation unit 123 is further released, the holding unit 120 rotates clockwise in a front view by the biasing force of the biasing unit 140. In this state, the main body portion 121 (central portion 121a) of the holding unit 120 is located on the opposite side of the base portion 111 with the second mounting portion 13c interposed therebetween, so that the second insertion portion 115 can be prevented from coming out of the second through hole 13e. In this way, the mounting mechanism 100 is attached to the second mounting portion 13c.

[0063] Thus, with the attachment mechanism 100 attached to the second attachment portion 13c, the tail ring 15 will be positioned near the upper end of the resistance rod 13 as shown by the dashed two-dot line in Fig. 2. In this way, when the tail ring 15 is not used, it can be attached at a position where it does not interfere with the work.

[0064] Note that the plate surface of the second attachment portion 13c faces left and right, while the plate surface of the first attachment portion 13b faces up and down. That is, the plate surfaces of the first attachment portion 13b and the second attachment portion 13c face different directions. Accordingly, the attachment mechanism 100 is provided with a first insertion portion 114 and a second insertion portion 115 that face different directions. By appropriately using the first insertion portion 114 and the second insertion portion 115, the tail ring 15 can be attached to either the first attachment portion 13b or the second attachment portion 13c in the same posture.

[0065] As described above, by using the attachment mechanism 100, the attachment position of the tail ring 15 can be changed. At this time, the operator can easily attach and detach the tail ring 15 by operating the operation portion 123 to swing the holding portion 120. Also at this time, since the holding portion 120 does not separate from the support portion 110, there is no risk of loss of members or the like.

[0066] As described above, the attachment mechanism 100 for the tail ring 15 according to the present embodiment includes a support portion 110 that supports the tail ring 15 and can be attached to an attachment portion (the first attachment portion 13b and the second attachment portion 13c) provided on the walking-type management machine 1, a holding portion 120 that is swingably provided with respect to the support portion 110 and can be switched between a holding position where the support portion 110 is held against the attachment portion and a release position where the holding of the support portion 110 against the attachment portion is released by swinging with respect to the support portion 110, and is configured to include these components. By configuring it in this way, the workability when changing the attachment position of the tail ring 15 can be improved. Specifically, an operator can attach and detach the tail ring 15 by a simple operation of swinging the holding portion 120. Further, when attaching and detaching the tail ring 15, since the holding portion 120 does not separate from the support portion 110 (they are integrally provided), there is no risk of loss of members or the like.

[0067] Further, the attachment mechanism 100 is provided with a biasing portion 140 that biases the holding portion 120 toward the holding position. By configuring it in this way, it is possible to prevent the support portion 110 from falling off. Further, it is possible to easily switch the holding portion 120 to the holding position.

[0068] Further, the support portion 110 includes a base portion 111, a first insertion portion 114 that protrudes from the base portion 111 in a first direction and is insertable into the first attachment portion 13b, The holding portion 120 holds the first insertion portion 114 inserted into the first attachment portion 13b in the holding position. By configuring it in this way, by holding the first insertion portion 114 inserted into the first attachment portion 13b, it is possible to prevent the support portion 110 from falling off.

[0069] Further, the holding portion 120 is provided with a regulating arm 122 (first regulating portion) that prevents the first insertion portion 114 from coming out of the first attachment portion 13b by being located on the side opposite to the base portion 111 with the first attachment portion 13b sandwiched therebetween in the holding position. By configuring it in this way, it is possible to hold the first insertion portion 114 inserted into the first attachment portion 13b with a simple configuration.

[0070] Further, the support portion 110 It has a second insertion portion 115 that protrudes in a second direction different from the first direction and is insertable into the second attachment portion 13c. The holding portion 120 At the holding position, it holds the second insertion portion 115 in a state where it is inserted into the second attachment portion 13c. By configuring it in this way, by holding the second insertion portion 115 in a state where it is inserted into the second attachment portion 13c, the detachment of the support portion 110 can be prevented. Also, by using the second insertion portion 115 that protrudes in a direction different from the first insertion portion 114, the tail ring 15 can be attached in a direction different from the case of using the first insertion portion 114. Thereby, for example, in this embodiment, the tail ring 15 can be attached to either the first attachment portion 13b or the second attachment portion 13c in the same posture.

[0071] Also, the holding portion 120 At the holding position, it has a central portion 121a (second restricting portion) that is located on the side opposite to the base portion 111 with the second attachment portion 13c interposed therebetween, thereby preventing the second insertion portion 115 from coming out of the second attachment portion 13c. By configuring it in this way, the second insertion portion 115 can be held in a state where it is inserted into the second attachment portion 13c with a simple configuration.

[0072] Also, at least one of the first insertion portion 114 and the second insertion portion 115 Positions the holding portion 120 by coming into contact with the holding portion 120. By configuring it in this way, the holding portion 120 can be positioned using the first insertion portion 114 or the second insertion portion 115. Thereby, the members can be used in common, and the structure can be simplified.

[0073] Also, the holding portion 120 Has an operable operation portion 123, The support portion 110 Has a surrounding portion 117 formed so as to surround the movable range of the operation portion 123. By configuring it in this way, it is possible to suppress foreign matter from entering the movable range of the operation unit 123.

[0074] Moreover, the walking-type management machine 1 according to the present embodiment is equipped with the attachment mechanism 100 of the rear wheel 15. By configuring it in this way, the workability when changing the attachment position of the rear wheel 15 can be improved.

[0075] Moreover, the attachment parts (the first attachment part 13b and the second attachment part 13c) are formed at a plurality of locations on the resistance bar 13 provided on the walking-type management machine 1. By configuring it in this way, the rear wheel 15 can be attached at a plurality of locations on the resistance bar 13.

[0076] Note that the first attachment part 13b and the second attachment part 13c according to the present embodiment are one form of implementation of the attachment part. Moreover, the regulation arm 122 according to the present embodiment is one form of implementation of the first regulation part. Moreover, the central part 121a according to the present embodiment is one form of implementation of the second regulation part.

[0077] Although the embodiments of the present invention have 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.

[0078] For example, the holding part 120 only needs to be provided so as to be swingable with respect to the support part 110, and its specific configuration is not particularly limited.

[0079] Moreover, in the present embodiment, a torsion coil spring is shown as an example of the biasing part 140, but the present invention is not limited thereto, and various other members (compression coil springs, leaf springs, etc.) can be used.

[0080] In addition, in the present embodiment, an example in which the first insertion portion 114, the second insertion portion 115, and the regulation arm 122 are each formed of a columnar member is shown. However, the present invention is not limited to this, and members having various other shapes (for example, prismatic shapes, plate shapes, etc.) can be used.

[0081] In addition, in the present embodiment, an example in which the first insertion portion 114 and the second insertion portion 115 are arranged in directions orthogonal to each other is shown. However, the directions of the first insertion portion 114 and the second insertion portion 115 are not limited to this, and can be arbitrarily changed. In addition to the first insertion portion 114 and the second insertion portion 115, it is also possible to further provide insertion portions arranged in other directions.

[0082] In addition, in the present embodiment, an example in which attachment portions (the first attachment portion 13b and the second attachment portion 13c) for attaching the tail rings 15 are provided above and below the resistance rod 13 is shown. However, the present invention is not limited to this, and attachment portions can be formed at arbitrary locations. For example, it is also possible to form attachment portions at intermediate positions above and below the resistance rod 13, or on members other than the resistance rod 13 (for example, the tillage cover 8b, the handle frame 10, etc.).

[0083] In addition, in the present embodiment, when attaching the attachment mechanism 100 to the first attachment portion 13b, an example in which the attachment mechanism 100 is attached above the first attachment portion 13b (the base portion 111 is placed on the first attachment portion 13b) is shown (see FIG. 7). However, the present invention is not limited to this. For example, it is also possible to attach the attachment mechanism 100 by turning it upside down and attaching the attachment mechanism 100 below the first attachment portion 13b. By attaching the attachment mechanism 100 to the first attachment portion 13b from different directions in this way, the position of the tail ring 15 can be changed (fine-tuned).

Explanation of Reference Numerals

[0084] 1 Walking-type management machine 13b First attachment portion 13c Second attachment portion 15 Tail ring 100 Attachment mechanism 110 Support portion 111 Base part 114 First insertion part 115 Second insertion part 117 Surrounding part 120 Holding part 121a Central part 122 Regulation arm 123 Operating part 140 Biasing part

Claims

1. A support part that supports a trailing wheel and can be attached to an attachment part provided on a walking type management machine, A holding part that is provided so as to be swingable with respect to the support part, and by swinging with respect to the support part, can be switched between a holding position for holding the support part with respect to the attachment part and a release position for releasing the holding of the support part with respect to the attachment part, comprising The support part has a base part, and comprises a first insertion part that protrudes from the base part in a first direction and can be inserted into the attachment part, The holding part holds the first insertion part in a state of being inserted into the attachment part at the holding position, The holding part comprises a first restricting part that, at the holding position, is located on the side opposite to the base part with the attachment part therebetween, thereby preventing the first insertion part from coming out of the attachment part, Attachment mechanism for a trailing wheel.

2. A support part that supports a trailing wheel and can be attached to an attachment part provided on a walking type management machine, A holding part that is provided so as to be swingable with respect to the support part, and by swinging with respect to the support part, can be switched between a holding position for holding the support part with respect to the attachment part and a release position for releasing the holding of the support part with respect to the attachment part, comprising The support part has a base part, and comprises a first insertion part that protrudes from the base part in a first direction and can be inserted into the attachment part, The holding part holds the first insertion part in a state of being inserted into the attachment part at the holding position, The support part comprises a second insertion part that protrudes from the base part in a second direction different from the first direction and can be inserted into the attachment part, The holding part holds the second insertion part in a state of being inserted into the attachment part at the holding position, Attachment mechanism for a trailing wheel.

3. The holding part comprises a second restricting part that, at the holding position, is located on the side opposite to the base part with the attachment part therebetween, thereby preventing the second insertion part from coming out of the attachment part, Attachment mechanism for a trailing wheel according to claim 2.

4. At least one of the first insertion part and the second insertion part positions the holding part by coming into contact with the holding part, Attachment mechanism for a trailing wheel according to claim 2 or claim 3.

5. comprises a biasing part that biases the holding part toward the holding position, Attachment mechanism for a trailing wheel according to any one of claims 1 to 4.

6. The holding part comprises an operable operation part, The support part Comprising a surrounding portion formed so as to surround the movable range of the operation unit The attachment mechanism for the tail wheel according to any one of claims 1 to 5

7. Comprising the attachment mechanism for the tail wheel according to any one of claims 1 to 6 A walking-type management machine

8. The attachment portion Formed at a plurality of locations on a resistance bar provided in the walking-type management machine The walking-type management machine according to claim 7

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