JPS6248245B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a locking mechanism for an operating lever. More specifically, the present invention relates to a locking mechanism for locking an operating lever in an ON state or an OFF state, for example, in an operating lever of a construction machine, an industrial machine, a vehicle, or the like.

This type of operating lever, for example a clutch lever, will generally be described with reference to FIG. 1, which shows an embodiment of the operating lever locking mechanism of the present invention.
Insert the proximal end of the lever body 1 into the groove 15 provided in the support part 12 of a lever stand, etc., and insert the pin 13
The lever body 1 is tiltably supported, and an operating force transmitting means 14 such as a link is connected between the base end of the lever body 1 and an operated part (not shown). The operated portion is operated by tilting the lever body 1 from the state shown by the two-dot chain line to the state shown by the solid line, or by raising it from the state shown by the solid line to the state shown by the two-dot chain line.

Here, the locking mechanism for locking the above-mentioned lever body 1 in the ON state or OFF state, for example, the state shown by the solid line in FIG. 1, includes a push button type, a stopper type, and an engagement groove type.

The push button type is widely used in vehicle parking brake levers, and the lever body can be locked at any position, and the locked state can be released by pressing the push button.

In the stopper type, the lever body is locked by inserting the stopper into the support portion perpendicular to the lever groove, and the locked state is released by removing the stopper.

Finally, the engagement groove type has an engagement groove connected to the lever groove almost at right angles to the lever groove, and the lever body is engaged with the engagement groove, and then the lever body is moved by the spring force. The locked state is released by locking the engaged state in the engaging groove and removing the lever body from the engaging groove against the spring force.

However, each of the above locking mechanisms has the following drawbacks.

First, the push button type has a locking function (locking effect) that is always working, so it cannot be released, so it is difficult to release the locking function. In devices such as clutch levers, it is necessary to press a push button each time to release the locked state, resulting in poor operability.

Next, with the stopper type, the lock function can be released, but it is very difficult to operate because it is necessary to tilt the lever body with one hand while inserting and removing the stopper with the other hand. bad for

Finally, in the engagement groove type, the lever body is kept engaged with the engagement groove by spring force, so if a force greater than the spring force is applied to the lever body, the lever body will come off from the engagement groove. There is a risk of incorrect operation. Moreover, since the engagement groove is connected to the lever groove at almost right angles to the lever groove, a space corresponding to the engagement groove is required in the support part, which is not suitable when a large number of levers are arranged. be.

The present invention aims to provide a locking mechanism for an operating lever that overcomes the above-mentioned drawbacks.

In the present invention, a moving rod is housed in a lever body, a swinging hook is attached to the lever main body, the swinging hook and the moving rod are linked, and the swinging hook swings as the moving rod moves. A fixed hook that locks the state of the lever body when the swinging hook engages with the support part is fixed, a shifter is slidably and rotatably provided on the lever body, and the shifter and the moving rod are connected to each other. By sliding this shifter, the engagement between the swinging hook and the fixed hook is released, and by rotating the shifter, the engagement function between the swinging hook and the fixed hook is released. It is characterized by

Hereinafter, one embodiment of the operating lever locking mechanism of the present invention will be described with reference to the accompanying drawings.

The locking mechanism of the operating lever of the present invention in this embodiment is arranged in the lever body 1 from the tip (hereinafter referred to as the upper end or upper side; conversely, the base end side of the lever body 1 is referred to as the lower end or lower side) to approximately the center. At the same time, a hollow part 16 is formed between the upper end of the lever body 1 and the hollow part, that is, the hollow part 1
A first elongated hole 17 and a second elongated hole 18 are provided in the axial direction of the lever body 1 at locations corresponding to both upper and lower ends of the lever body 1 . In the hollow part 16 of this lever body 1, the length is shorter than the length of the hollow part 16, and the first
A moving rod 2 that is slightly longer than the elongated hole 17 and the second elongated hole 18 is movably housed, and a second elongated hole is provided at the upper and lower ends of the moving rod 2 at locations corresponding to the first elongated hole 17 and the second elongated hole 18. The first pin 6 and the second pin 7 are respectively fixed, and the first pin 6 and the second pin 7 are inserted into the first elongated hole 17 and the second elongated hole 18.
A step 19 is provided at the upper end of the moving rod 2 (on the tip side of the lever main body 1), the lower end of the compression coil spring 5 is engaged with the step 19, and the lower end of the stopper 3 is screwed onto the upper end of the lever main body 1. The upper end of the compression coil spring 5 abuts against the lower end surface of the stopper 3, and the spring force of the compression coil spring 5 constantly urges the moving rod 2 downward. At this time, the first pin 6 and the second pin 7 are connected to the first elongated hole 1.
7 and the lower end of the second elongated hole 18, the moving rod 2 does not move downward any further. A spherical grip 4 is screwed and fixed to the upper end of the stopper 3. A mounting piece 19 is fixed at a position slightly above the upper surface of the support portion 12 in the center of the lever body 1, and the base end of the swing hook 9 is connected to the central axis of the lever body 1 by a pin 10 on this mounting piece 22. It is mounted so as to be able to swing up and down in a parallel plane, and the second pin is engaged with this swinging hook 9, so that the swinging hook 9 swings up and down as the moving rod 2 moves up and down. Configure it to do so. In addition, this swinging hook 9 is
The compression coil spring 5 causes the moving rod 2, the second
It is always biased in the direction of the arrow (the direction in which it engages with a fixing hook 11, which will be described later) via the pin 7. A fixing hook 1 is attached to the edge of the lever groove 15 of the support portion 12.
1 is bolted so that the swinging hook 9 engages with the fixed hook 11 when the lever body 1 reaches a predetermined position, for example, the position shown by the solid line in FIG.
The lower surface of the hook portion 90 provided at the free end (tip) of this swinging hook 9 and the lever groove 1 of the fixed hook 11
Inclined surfaces 91, 111 are provided on the upper surface of the hook portion 110 provided at the end on the 5 side. A shifter 8 is disposed near the first elongated hole 17 at the upper end of the lever body 1, and is slidable in the axial direction of the lever body 1.
The shifter 8 is mounted rotatably in the circumferential direction, and the shifter 8 is provided with two engaging grooves 20 with a phase difference of 180°.
This engagement groove 20 includes a straight part 200 provided in a straight line in the axial direction, a spiral part 201 spirally provided from below to above the lower end of the straight part 200, and slightly below the upper end of the spiral part 201. It consists of a locking part 202 that is lowered to the lower side. The first pin 6 is engaged with this engagement groove 20. A collar portion 80 is provided at the upper end of the shifter 8. In the figure, reference numeral 21 denotes a stopper portion protruding from the lever body 1, which prevents the shifter 8 from falling downward.

The locking mechanism of the operating lever of the present invention in this embodiment has the above-mentioned structure, and its operation will be explained below.

First, when the lever body 1 is tilted from the OFF state (the state shown by the two-dot chain line in FIG. 1) to the ON state (the state shown by the solid line in FIG. 1) and the ON state is locked. In this case, grasp the grip 4 and tilt the lever body 1 in the direction of the arrow. Then, the inclined surface 91 of the swinging hook 9, which is constantly biased in the direction of the arrow B by the compression coil spring 5, moves against the fixed hook 11.
The swinging hook 9 swings along the inclined surfaces 91 and 111 against the spring force of the compression coil spring 5 in the direction opposite to the arrow (b). At this time, the moving rod 2 is pushed upward and the first
The pin 6 and the second pin 7 reach near the upper ends of the first elongated hole 17 and the second elongated hole 18, and the compression coil spring 5
is compressed. Further, when the lever body 1 is tilted in the direction of arrow A, the inclined surface 91 of the swinging hook 9 passes over the inclined surface 111 of the fixed hook 11, and the swinging hook 9 is moved by the spring force of the compressed coil spring 5 shown in the arrow The hook portion 90 of the swinging hook 9 engages with the hook portion 110 of the fixed hook 11, and the lever body 1 is locked in the ON state.
In this way, the locking operation is easy and the locked state is reliable.

Next, when returning from the locked ON state to the OFF state. In this case, while holding grip 4,
Put your finger on the flange 80 of the shifter 8 and pull up the shifter 8 against the spring force of the compression coil spring 5. Then, the first pin 6 engages the engagement groove 2 of the shifter 8.
Since the shifter 8 is pulled up, the moving rod 2 is also pulled upward, and the first pin 6 and the second pin 7 are engaged with the lower end of the straight part 200 of the The swinging hook 9 that moves from bottom to top in the elongated hole 18 and particularly engages the second pin 7 swings in the direction opposite to arrow B, and the state of engagement between the swinging hook 9 and the fixed hook 11 is shown. In other words, the locked state is released, and by raising the lever body 1 in the opposite direction of arrow A in this state, the lever body 1
can be returned to the OFF state. in this way,
It is also possible to easily release the lock.

When releasing the lock function, for example, when the clutch lever is operated frequently when working on a clamshell bucket. In this case,
Rotate shifter 8 clockwise. Then, the first
Since the pin 6 is engaged with the first elongated hole 17 and its movement in the circumferential direction is restricted, the helical portion 2 of the engagement groove 20
01, and along with it, the moving rod 2
rises against the spring force of the compression coil spring 5, and as a result of this rise of the moving rod 2, the swinging hook 9 swings via the second pin 7 in the direction opposite to the direction of the arrow (B). Furthermore, when the shifter 8 is rotated clockwise, the first pin 6 is locked in the locking part 202 of the engagement groove 20, and even if the shifter 8 is released, the moving rod 2 is not pressed against the spring of the compression coil spring 5. It will not fall due to force. Therefore, the swinging hook 9 maintains a state in which it swings in the direction opposite to arrow B, that is, a state in which the swinging hook 9 and the fixed hook 11 do not mesh with each other. In this way, the lock function can be easily released. Further, by rotating the shifter 8 in the counterclockwise direction, the swinging hook 9 becomes in a state where it can engage with the fixed hook 11, and the locking function can be activated.

In the above-described embodiment, since the straight portion 200 is provided in the engagement groove 20 of the shifter 8, the swinging hook 9 moves along the inclined surfaces 91 and 111 when the lever body 1 is locked in the ON state. When the shifter 8 swings in the opposite direction to the direction of the arrow RO and the moving rod 2 rises, the shifter 8 becomes free with respect to the moving rod 2, and as the moving rod 2 rises, the shifter 8 also rises. It is possible to prevent the operator's fingers from being caught between the shifter 8 and the grip 4.

As is clear from the above embodiments, the locking mechanism of the operating lever of the present invention allows the locking and unlocking operations to be easily performed with one hand.
And the lock is certain. Also, since the lock function can be released, it can be used for levers that are frequently operated. Moreover, since there is no need to provide an engagement groove as in the conventional engagement groove type, there is no need to take up a large space, and it is suitable for devices in which a large number of levers are arranged.

[Brief explanation of the drawing]

The accompanying drawings show an embodiment of the locking mechanism of the operating lever of the present invention, in which FIG. 1 is a side view, FIG. 2 is a partial cross-sectional view in the locked state, and FIG. 3 is a partial cross-section taken in the direction of the arrow in FIG. FIG. 4 is a developed view of the shifter. 1... Lever body, 2... Moving rod, 5...
Compression coil spring, 6...first pin, 7...second pin, 8...shifter, 9...swinging hook, 11...
... Fixed hook, 12 ... Support part (lever stand), 16 ... Hollow part, 17 ... First elongated hole, 18
...Second elongated hole, 20...Engagement groove.

Claims (1)

[Claims] 1. The base end of the lever body is tiltably supported on a support part, and a hollow part is provided at the tip of the lever body, and a first elongated hole and a second elongated hole are provided at positions corresponding to both ends of the hollow part of the lever body. A movable rod is housed in the hollow portion so as to be movable in the axial direction of the lever body, and a first pin and a second pin are respectively fixed to both ends of the movable rod. A first pin and a second pin are inserted into the first elongated hole and the second elongated hole, and an elastic member is interposed between the movable rod and the lever body so that the movable rod is always moved toward the proximal end of the lever body. and attaching a swinging hook to the lever main body so as to be swingable in a plane parallel to the central axis of the lever main body,
The second pin is engaged with the swinging hook so that it can swing as the moving rod moves;
A fixing hook is fixed to the supporting portion so that the swinging hook engages with the fixing hook when the lever body reaches a predetermined position, and a shifter is attached to the lever body so as to be slidable in the axial direction of the lever body. The shifter is mounted so as to be rotatable in the circumferential direction of the lever body, and an engagement groove is provided in the shifter, and the first pin is engaged with the engagement groove to move the shifter against the elastic force of the elastic member. The shifter is characterized in that when the shifter is slid, the meshing state between the swinging hook and the fixed hook is released, and when the shifter is rotated, the meshing function between the swinging hook and the fixed hook is released. Lock mechanism for operating lever.