JPS626904Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary control lever used as a speed change control lever of a mobile agricultural machine such as a tractor, and more particularly to a lock structure of a rotary control lever.

FIG. 1 is a side view of a conventional tractor as described in the earlier application, Utility Model Application No. 56-66843, and shows one example of the arrangement of rotary operating levers 02, 03. The operating lever 02 is provided on the floor in front of the seat 04, and the second operating lever 03 is provided on the operating panel 07. The conventional second operating lever 03 will be explained using FIGS. 2 and 3. The second operating lever 03 is a rotary operating lever 03 provided on the operating panel 07.
This device only has a pointer 06 and a display 05 that indicate the position of the operating lever 03, but does not have a locking mechanism for the operating lever.If the operator carelessly touches the operating lever during work, the operating lever may This had the disadvantage that it could move unexpectedly, hindering operation work, and creating dangers due to unexpected movements of the agricultural machinery. The present invention aims to eliminate this problem of the conventional rotary operating lever.

In order to achieve this purpose, the lock structure of the rotary operating lever of the present invention has a hard pointer protruded at an eccentric position with respect to the center of rotation of the rotary operating lever, and a hard pointer is fixed to the operating lever so that the operating lever can freely rotate. An engaging member that can freely engage and disengage from a pointer at a predetermined position is attached to a fixed member held at the pointer. This configuration employs a display section that displays images. With this configuration, not only can the operating lever be locked at a predetermined operating position by the engaging member, but also a hard pointer is used as the locking pin, so the open/closed state of the lock and the locked position can be determined at a glance on the display. Not only that, but there is no need to provide a separate locking pin, resulting in a simple configuration.

Hereinafter, embodiments of the present invention will be described based on FIGS. 4 to 8.

The mounting position of the operating lever 1 of this embodiment is the same as that of the conventional operating levers 02 and 03, so the explanation will be omitted.

As shown in Fig. 4, the rotary operating lever 1 of the present invention
A hard pointer 3 protrudes from the base of the operating lever 1 and is fixed thereto to also serve as a locking pin. 4, 5, and 6 all show a state in which the pointer 3 is engaged with the notch of the locking engagement member 2 (hereinafter referred to as the lock lever) and locked. The lock lever 2 has a substantially S-shape when viewed from the side, and a bearing member 5, which is a substantially square rod-shaped body, is fixed to the lower surface. A pivot pin 6 is supported through the bearing member 5, and the pivot pin 6 is rotatably supported by a bracket 8 fixed to a fixed member such as an operation panel. Moreover, the bearing member 5 is
Its lower surface is constantly pressed by a reversing spring 7, which is a substantially S-shaped leaf spring, and keeps the lock lever 2 at a stable standstill in the locked and released positions. In FIG. 4, the unlocked position of the lock lever 2 is shown by a chain line. Further, reference numeral 9 shown in FIG. 5 is a lock display panel indicating the locked state of the operating lever, which is covered by the operating section of the locking lever 2 and cannot be seen when the locking lever 2 is in the released position. Reference numeral 10 denotes a display panel that indicates the position of the operating lever, and is fixed at a panel position along the rotation locus of the pointer 3.

7 and 8 show another embodiment of the lock structure, in which the lock lever 12 is of a sliding type. This lock lever 12 is formed by a rib 13.
A holding member 1 fixed to the panel 06 in parallel with each other
is slidably engaged with the sliding grooves 1 and 11;
The ball stopper 14 is configured to stably stand still at the lock position and the release position.

In the above embodiments, the configuration may be changed by combining one or more of the following.

In the case shown in FIGS. 6 and 7, the display panel 10 is a transparent plate placed above the pointer 3.

The operating lever is not limited to forward and backward movement, but also a lever for changing the driving speed in other places, or
It should be a lever, etc. for PTO shaft shifting.

Mobile agricultural machinery is not limited to riding types, but must include walk-behind tractors, combines, binders, harvesters, rice transplanters, transport vehicles, etc.
In addition, the target is not just mobile agricultural machinery, but also rotary operating levers used in other industrial machinery and vehicles.

Displaying specified characters or symbols directly on the corresponding position of the holding member without providing a display panel.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the locking structure of the rotary operating lever according to the present invention, FIG. 4 is a side view of the locking structure of the operating lever of the present invention, and FIG. 5 is a plan view of the locking lever of the operating lever of the present invention. 6 is a front view of the lock lever of the operating lever of the present invention, FIGS. 7 and 8 show another embodiment, FIG. 7 is a longitudinal sectional view, and FIG. 8 is a horizontal sectional view. FIG. 1 is a side view of a conventional tractor, FIG. 2 is a front view of an operating panel of the conventional tractor, and FIG. 3 is a front view of the structure of a conventional operating lever. 1... Rotary operating lever, 2, 12... Engaging member (lock lever), 3... Pointer.

Claims (1)

[Scope of utility model registration request] A hard pointer is fixed at a position protruding eccentrically from the center of rotation of the rotary operating lever, and the operating lever is engaged with and disengaged from the pointer at a predetermined position by a fixed member that rotatably holds the operating lever. A lock structure for a rotary operation lever, to which a freely engaging member is attached, and a display section for displaying the operation position of the operation lever with the pointer is provided at a position along the movement trajectory of the pointer of the fixed member.