JPH0628963Y2 - Rear two wheel handle structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a handle structure for operating the raising and lowering of the rear two wheels of a cultivator or the like.

[Conventional technology]

As the above-mentioned handle structure, conventionally, a holding member is provided between a pair of left and right top masts fixed to the tiller side so as to be relatively rotatable around a horizontal axis core, and the handle rod is attached to the holding member with its rod axis core. The cylindrical support rod is externally fitted and screwed onto the lower end of the handle rod, and the other end of the tubular support rod is interlockingly connected to the rear two-wheel frame. A tubular body configured to adjust the wheel up and down, and provided with the handle rod and the tubular support rod to be externally fitted, the handle is attached to the holding member via a connecting pin, and the connecting pin is attached to the holding member. A pair of elastic plates configured to project laterally and having a holding member having a space narrower than the length of the connecting pin in a free state and capable of elastically holding the connecting pin. And a pair of elastic plate pieces capable of locking the tubular body. The elastic plate is fixed, the distal end of the pair of elastic plates pieces of the elastic plate, was sealed fit engagement with the engaging hole formed in the tubular body.

[Problems to be solved by the invention]

According to the above-described conventional structure, the elastic plate can be used to elastically hold the handle after the rear two wheels are lifted and lowered, but a cylinder that covers the lower handle bar and the tubular support bar. The locking and holding of the body has a drawback that it is easily disengaged due to vibration of the machine body or the like.

However, since the holding member, the elastic plate, the handle rod, and the tubular support rod must be sequentially assembled to the top mast, the elastic plate and the tubular body cannot be fixed, and If bolts etc. are used, the number of parts will increase and it will take time and effort to assemble and disassemble.

An object of the present invention is to prevent the tubular body from coming off without increasing the number of parts.

[Means for solving problems]

To achieve the above object, the present invention is characterized in that a holding member is provided between a pair of left and right top masts fixed to a tilling device side so as to be relatively rotatable about a horizontal axis, and a handle is provided with respect to the holding member. A rod is provided so as to be relatively rotatable around the rod axis, and a cylindrical support rod is externally screwed onto the lower end of the handle rod, and the other end of the cylindrical support rod is attached to the rear two-wheel frame. A tubular body configured to be interlocked to adjust the rear two wheels up and down and to which the handle rod and the tubular support rod are fitted.
A handle is attached to an upper portion of the handle rod via a connecting pin, and the connecting pin is configured to project laterally from the holding member, and the holding member is narrower than the length of the connecting pin in a free state. By fixing an elastic plate including a pair of elastic plate pieces configured to elastically hold the connecting pin with a space, and a pair of elastic plate pieces capable of locking the tubular body, In a rear two-wheel handle structure in which the tubular body is locked to the elastic plate, a pair of elastic plate pieces bent upward and downward so as to form a cross shape when the elastic plate is developed. A pair of elastic plate pieces that are bent, and the pair of elastic plate pieces that are bent downward are respectively positioned between the top masts and are fitted into locking holes formed in the tubular body. It is locked together.

[Action]

Since the pair of elastic plates bent downward and the tubular body are fitted and locked between the handle rod and the top mast, the pair of elastic plates are liable to vibrate due to vibration or the like. Even if the top mast tries to come off from the tubular body, the top mast blocks the movement of the elastic plate, and the coming off can be prevented.

[Effect of device]

The elastic holding plate for holding the operating position of the handle could be used to reliably maintain the locking and holding of the tubular body that covers the handle rod and the like.

Further, there is an advantage that the above-mentioned remarkable effect can be obtained by a simple structural improvement in which the phase of the pair of elastic plates bent downward is shifted by 90 degrees from the phase of the pair of elastic plates bent upward.

〔Example〕

3 and 4 show a rear part of a cultivator equipped with a rear two-wheel handle structure of the present invention, and a pair of left and right triangular flat top masts fixed to a rear frame of the cultivating device (1) ( A holding member (3) is provided between 2) and (2) so as to be relatively rotatable around the horizontal axis (P ₁ ), and the handle rod (4) is provided to the holding member (3).
Is provided so as to be relatively rotatable around the rod axis thereof, and the tubular support rod (5) is externally fitted and screwed to the lower end of the handle rod (4) so that the tubular support rod (4) The lower end is interlockingly connected to the rear two-wheel frame (7) through the link mechanism (6) so that the rear two wheels (8), (8) can be adjusted up and down.

Connect the handle (9) to the upper part of the handle rod (4) and connect the pin (10).
The connecting pin (10) to the holding member.
It has a length that projects laterally from (3). (11)
Is a bearing. A pair of elastic plate pieces (12) are bent upward so as to form a cross shape when the elastic plate (12) is unfolded.
a) and (12a) and a pair of elastic plate pieces (12b) and (12
b) a pair of elastic plate pieces that are composed of
(12b) and (12b) are located between the top masts (2) and (2), respectively.

The upper and lower elastic plate pieces (12a), (12a), (12b), (12b),
It is composed of one elastic plate (12), and has a hole at the center thereof for inserting the handle rod (4). Further, the pair of elastic plate pieces (12a), (12a) bent upwardly.
The distance (l) between them is always set to a width narrower than the length (L) of the connecting pin (10) of the handle (9) so as to maintain elasticity. The elastic plate (12) is sandwiched between the brim (4 ′) of the handle rod (4) and the holding member (3).

The lower end of the pair of elastic plate pieces (12b), (12b) bent downward is bent in a hook shape to cover the handle bar (4) and the cylindrical support bar (5). Holes (13 '), 1 in the shape body (13)
3 ') is fitted and locked.

(14) is a rear cover of the tiller (1), which is attached to the rear end of the tiller cover (15) so as to be vertically swingable.

(16) is a spring mechanism, which urges the rear cover (14) downward so as to exert a ground leveling force.
Arms (17) and (17) extended from (1), a pair of left and right support rods (16a) and (16a) extending downward from them, and a spring (16
It consists of b) and (16b). The arm (17), (17)
Is configured to be vertically adjustable with respect to the cultivating cover (15) by connecting pins.

FIG. 3 shows a state in which the soil (18) is mounted in place of the rear two wheels (FIG. 4), the holder (19) is attached to the rear two-wheel frame (7), and the holder (19) is attached. ) Is fitted with the soil attachment means (20), and the soil attachment means (20) is composed of a dogleg-shaped body metal fitting (20a) and a J-shaped inversion metal fitting (20b). The bent end of the reversing metal fitting (20b) is pivotally attached to the middle portion of the metal fitting (20a), and at both ends of the main body metal fitting (20a),
Provide bolt holes (20c) and (20d) for fixing bolts (20f),
Further, the reversing metal fitting (20b) is also provided with holes (20e) which match the bolt holes (20c), (20d) at the normal position and the reversing position. A holder (22) for holding a support rod (21) of the soil (18) is attached to the other end of the reversing metal fitting (20b).
As a result, the cultivating soil (18) can be inverted and held at the upper position (Fig. 4), and the tail wheel can be attached to work or move without removing the cultivating soil (18).

[Brief description of drawings]

The drawings show an embodiment of the rear two wheels according to the present invention. FIG. 1 is a vertical sectional side view of a main part, FIG. 2 is a partially cutaway side view of the main part, and FIG.
FIG. 4 is a side view of the rear part of the cultivator showing a state of using cultivation soil, and FIG. 4 is a side view of the rear part of the cultivator showing a state of not using cultivation soil. (1) …… Tilling device, (2) …… Top mast, (3) …… Holding member, (4) …… Handle rod, (5) …… Cylindrical support member, (7)
…… Rear two-wheel frame, (8) …… Rear two wheels, (9) …… Handle, (10) …… Connecting pin, (12) …… Elastic plate, (12a), (12b)
...... Elastic plate piece, (13) ...... Cylindrical body, (13 ') ...... Locking hole, (P
₁ ) …… Horizontal axis core, (L) …… Connection pin length, () …… Separation of elastic plate pieces.

Claims (2)

[Scope of utility model registration request] 1. A holding member (3) is provided between a pair of left and right top masts (2), (2) fixed to the tiller (1) side so as to be relatively rotatable around a horizontal axis (P ₁ ). A handle rod (4) is provided so as to be rotatable relative to the holding member (3) around its rod axis, and a cylindrical support rod (5) is attached to the lower end of the handle rod (4). The other end of the cylindrical support rod (5) is fitted and screwed into the rear two-wheel frame.
A cylindrical body which is connected to (7) and is configured to vertically adjust the rear two wheels (8), (8), and to which the handle rod (4) and the tubular support rod (5) are fitted. 13) is provided, the handle (9) is attached to the upper part of the handle rod (4) through the connecting pin (10), and the connecting pin (10) is projected laterally from the holding member (3). The holding member (3) can elastically clamp the connecting pin (10) with a space (l) narrower than the length (L) of the connecting pin (10) in the free state. A pair of elastic plate pieces
(12a), (12a), and the elastic plate (12) provided with a pair of elastic plate pieces (12b), (12b) capable of locking the tubular body (13) is fixed,
In the two-wheel handle structure in which the tubular body (13) is locked to the elastic plate (12), the elastic plate (12) is bent upward so as to form a cross shape in a developed view. A pair of elastic plate pieces
(12a), (12a) and a pair of elastic plate pieces (12b) bent downward,
(12b), a pair of elastic plate pieces (12b), (12b) that are bent downward, are located between the top masts (2), (2), respectively, and the tubular body ( Locking hole (13 ') formed in 13),
Handle structure for the rear two wheels fitted and locked to (13 '). 2. The pair of upper and lower elastic plate pieces (12a), (12a), (12)
b) and (12b) are composed of one elastic plate, and a hole for inserting the handle rod (4) is provided in the central portion thereof. Two-wheeled handle structure.