JPH0895656A - Locking mechanism of lever in lever device - Google Patents

Abstract

(57) [Summary] [Purpose] A lever detent device that can effectively detent the stay 4 without tightening it too much. A lever device in which a band 12 on one side of a shaft portion 1 of an operating handle and a lever supporting stay 4 on the other side are tightened and fixed via tightening bolts.
A concave portion 17 is formed on the inner surface of the band 12 or the stay 4 that abuts on the surface of the handle 4, and a rotation preventing member 18 having a convex portion 19 that can bite into the surface of the handle shaft 1 is fitted into the concave portion 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detent mechanism for preventing a lever attached to an operating handle from rotating during operation.

[0002]

2. Description of the Related Art Generally, tillers, binders, rice transplanters,
A steering clutch lever for changing the direction, a brake lever for braking, etc. are attached to a handle of an agricultural machine such as a rice mower or a mower.

By the way, when these levers are pulled and operated with a strong force, the levers may rotate around the shaft of the handle, which causes a drawback that the operability deteriorates.

To avoid such an inconvenience, the stay supporting the lever may be strongly tightened with respect to the handle shaft.

However, since the stay has recently been made of synthetic resin, aluminum, or the like, if the tightening force is increased, it may break, and the tightening force cannot be increased too much.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned drawbacks and to provide a lever rotation preventing device which can effectively prevent rotation of the stay without tightening the stay with too much force.

[0007]

In order to achieve the above object, a lever rotation preventing mechanism in a lever device according to the present invention has a band on one side of a shaft portion of a handle for operating an agricultural machine and a lever support on the other side. In a lever device in which a stay for use is tightened and fixed by a tightening bolt, a recess is formed in the inner surface of the band or stay that abuts the surface of the handle shaft, and the recess has a protrusion that can bite into the surface of the handle shaft It is characterized in that a detent member having is fitted.

[0008]

According to the present invention, by fastening and fixing the stay to the band, the convex portion of the tip of the anti-rotation member bites into the surface of the handle shaft even if the fastening force is not strong. Therefore, when operating the lever,
When a force that rotates around the center of the handle shaft is applied to the stay, the rotation of the stay is favorably prevented due to the biting of the detent member. Therefore, even if the stay is made of synthetic resin or aluminum, the stay is reliably prevented from rotating, and smooth lever operation can be performed.

[0009]

1 and 2, reference numeral 1 is a shaft portion of a handle for operating an agricultural machine, and 2 is a grip. Handle shaft 1
Is provided with a clutch lever 3.

The clutch lever 3 is provided so as to be vertically rotatable with respect to the stay 4 about a shaft portion 5. The stay 4 is made of synthetic resin, and the upper surface thereof is formed in a concave shape so as to be in close contact with the handle shaft 1, and is arranged so as to abut on the lower side of the handle shaft 1. Further, the stay 4 is formed with a storage portion for storing the base portion of the clutch lever 3 so as to be rotatable. A shaft portion 5 is integrally formed with the base portion of the clutch lever 3, and is housed in a housing portion of the stay 4 and rotatably supported. Also, on both sides of the stay 4, screw holes 6 and nuts 7 are provided.
A screw receiving portion 9 having a receiving groove 8 is formed to project. Reference numeral 10 is a lock lever, and 11 is a control wire that is moved and operated by separating the lever.

The stay 4 of the clutch lever 3 is fixed to the handle shaft 1 together with the band 12. Band 12
Is also made of synthetic resin, is disposed so as to abut on the upper side of the handle shaft 1, and as shown in FIG. 3, a screw receiving portion 15 having a substantially semi-cylindrical shape and having screw holes 14 formed on both sides is formed to project.

Next, the stay 4 is attached to the band 1 of the handle shaft 1.
When fixing to No. 2, the screw hole 14 of the band 12 may be inserted and tightened and fixed while the nut 7 is screwed into the bolt 16 penetrating the screw hole 6 of the stay 4.

By the way, as shown in FIGS. 2 and 3, a recess 17 is formed on the inner surface of the stay 4 which comes into contact with the surface of the handle shaft 1, and a rotation preventing member 18 is fitted into the recess 17. There is. The anti-rotation member 18 is made of a hard material such as metal and has a pointed convex portion 19 having a triangular cross section and capable of biting into the surface of the handle shaft 1.

Therefore, according to the above construction, the stay 4
Even if the tightening force is not strong, the convex portion 19 at the tip of the anti-rotation member 18 can be fixed by tightening and fixing the
Cut into the surface of the handle shaft 1. Therefore, when a force for rotating the stay 4 around the center of the handle shaft 1 is applied when the lever 3 is operated, the rotation of the stay 4 due to the biting of the rotation preventing member 18 can be prevented satisfactorily. It Therefore, even with the stay 4 made of synthetic resin, aluminum, or the like, the rotation is surely prevented and the lever can be smoothly operated.

The detent mechanism is not limited to the above example. For example, as shown in FIG. 4, the shape of the rotation preventing member 18 may be a shape in which a cylinder and a cone are combined.

Further, as shown in FIG. 5, the anti-rotation member 18 may be formed in a plate shape, and the surface of the anti-rotation member 18 may be formed with jagged irregularities.

Further, the detent mechanism can be applied to other levers such as a brake lever instead of the clutch lever, and may be arranged not on the stay 4 but on the band 12. That is, the concave portion 17 may be formed on the inner surface of the band 12, and the above-described rotation preventing member 18 may be fitted into the concave portion 17.

[Brief description of drawings]

FIG. 1 is a side view of a lever device according to the present invention.

FIG. 2 is a front view showing the lever device partially broken away.

FIG. 3 is an exploded perspective view of a lever rotation stopping mechanism in the lever device.

FIG. 4 is a perspective view of another example of the detent member.

FIG. 5 is a sectional view of another example of the rotation stopping mechanism.

[Explanation of symbols]

 1 Handle shaft 4 Stay 12 Band 17 Recessed portion 18 Anti-rotation member

Claims (1)

[Claims] 1. A lever device in which a band on one side of a shaft portion of a handle for operating an agricultural machine and a lever supporting stay on the other side are fastened and fixed via fastening bolts, and the band is in contact with the surface of the handle shaft. Alternatively, a lever detent mechanism in a lever device, characterized in that a recess is formed on the inner surface of the stay, and a detent member having a protrusion capable of biting into the surface of the handle shaft is fitted in the recess.