JPH02242310A - Positioning device for operating lever - Google Patents

Abstract

PURPOSE:To position and hold an operating lever by combining and using a ratchet gear and a ratchet hook. CONSTITUTION:At the time of non-operation of an operating lever 13, each ratchet hook 19 supported by a turning member 14 is engaged to one of claw parts of a ratchet gear 18, and the operating lever 13 is positioned. Since a ratchet hook 19 is drawn by a spring 21, the engagement is complete. When the operating lever 13 is brought to turning operation counterclockwise, the operating lever 13 is brought to forward tilting against the turning member 14 by a prescribed angle by deformation of an elastic body 17, a hook push-up rod 22 is brought to tilting, the ratchet hook ascends and the engagement is released. When a hook release mechanism 25 is operated, the end of the ratchet hook 19 is drawn by a wire 24 and the engagement is detached, and the operating lever 13 returns to a neutral position.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a positioning device for positioning and holding an operating lever for operating a switched device at a predetermined position.

(Prior Art) Conventionally, variable pulley type transmissions that utilize belt transmission have been widely used in, for example, agricultural machinery and the like. This transmission is, for example, JP-A-62-1
As disclosed in Japanese Patent No. 18159, a fixed shaft is fixed to each of a drive shaft and a driven shaft arranged parallel to each other in a rotationally integral and non-slidable manner with respect to each of the two shafts; A variable pulley (drive and driven pulley) is provided on the shaft, and a movable pulley (drive and driven pulley) is disposed oppositely to the fixed sheave to form a V-shaped belt groove and is rotatably and slidably supported. A V-belt is wound between the belt grooves of both pulleys, and the pulley diameter is made variable by opening and closing the ribs by moving the movable sheaves of each pulley in the axial direction. It is designed to change the gear ratio.

By the way, in this type of continuously variable transmission, the gear ratio between the drive shaft and the driven shaft is changed by shifting the operating lever. However, pulley type transmissions have the characteristic that the gear ratio changes to the lower speed side when a load is applied.
The operating lever is always biased in the direction toward the lower speed side of the gear ratio. Therefore, in order to resist this biasing force and keep the gear ratio constant and stable, it is necessary to immovably position the operating lever at a predetermined position using a positioning device.

As such a positioning device, a detent type is conventionally well known. That is, as shown in FIG. 4, this device is rotatably fixed to a rotary operating lever a, and has a plurality of engagement teeth bl, b1 on the outer circumference of the rotary end.
．． ... a fan-shaped day tent b, rotatably supported at a position apart from the center of rotation of the day tent b,
The engaging tooth portion bl+bl+ of the day tent b is attached to the rotating end.
A stopper link d has a stopper pin C that can be engaged with..., and the stopper link d is connected to the stopper pin C.
is provided with a spring e that urges the detent b to engage with the engaging tooth portions bl, b, . . . of the detent b. When the operating lever a is rotated together with the daytent b to the desired operating position, the stopper pin C of the stopper link d is biased by the biasing force of the spring e to the engagement teeth of the daytent b.
By fitting one of the levers l, . . . , the operating lever a is fixedly held at its rotational position. Note that C is a link that is drivingly connected to the transmission.

(Problem to be Solved by the Invention) However, in this conventional device, in order to reliably prevent movement of the operating lever a when a load is applied, the biasing force of the spring e must be increased to prevent the stopper bin C and the day tent b from moving. tooth b
It is necessary to ensure engagement with 1. But in that case,
On the other hand, when switching the operation lever a, the stopper pin e
It is necessary to overcome the engaging teeth bl, b, . . . of the detent b against the increased biasing force of the spring e, and it is undeniable that the switching operation force of the operating lever a increases.

In addition, a bearing that can rotate freely relative to the drive shaft (drive pulley) is installed at the bottom of the belt groove of the drive pulley in the transmission.
When the drive pulley is the most open and the driven pulley is the most closed, and the gear ratio is at the low speed end, the belt rides on the bearing, cutting off the power transmission between the drive shaft and the drive pulley and creating a neutral state. In some cases, an inner peripheral clutch mechanism is constructed. In this case, even if an attempt is made to cut off power transmission in the neutral state in an emergency, if the operating force on the operating lever is large, it will be difficult to quickly switch the operating lever to the neutral position.

The present invention has been made in view of the above points, and its purpose is to reliably prevent displacement of the operating lever without increasing the operating force of the operating lever in the operating lever positioning device as described above. The object of the present invention is to enable a device to be switched, such as a transmission, to be quickly switched to a predetermined state.

(Means for Solving the Problem) In order to achieve the above object, the invention described in claim (1):
The positioning device that positions the operating position of the operating lever has the following configuration. That is, a rotating member whose intermediate portion is rotatably supported by a fixed body is provided, one end of which is drivingly connected to the device to be switched, and the rotating member is moved in one direction so that the device to be switched is in a predetermined state. Energize rotation. Further, the base end of the operating lever is connected and supported to the other end of the rotating member via an elastic body, so that the operating lever can be relatively tilted by a predetermined angle along the direction of the rotating force of the rotating member. . A ratchet gear having a plurality of engagement teeth arranged in an arc shape around the rotation center of the rotation member on the outer periphery is fixed to the fixed body. A ratchet hook is rotatably supported at an intermediate portion at the other end of the rotating member, and a claw portion that can engage with the engagement tooth portion of the ratchet gear is provided at one end of the ratchet rack. A biasing means is provided for biasing the ratchet hook so that the claw portion engages with the engagement tooth portion of the ratchet gear.

Furthermore, a hook push-up bar is fixed to the operating lever, and when the operating lever is operated to rotate the rotating member in a direction opposite to the biasing direction and is tilted relative to the rotating member, the hook is pushed up. The rod is configured to rotate the ratchet hook against the biasing force of the biasing means to release the engagement between the pawl and the engagement teeth of the ratchet gear. Further, hook engagement release means is provided at the other end of the ratchet hook for rotating the ratchet hook against the urging force of the urging means to release the engagement between the pawl and the engagement teeth of the ratchet gear. Link.

Further, specifically, in the invention described in claim (2), the switching device is connected to a drive pulley and a driven pulley that are comprised of variable pulleys attached to a drive shaft and a driven shaft, respectively, and a variable pulley that is hung between the two pulleys. A V-belt, a transmission mechanism that changes the pulley diameter of each pulley to change the gear ratio between the drive shaft and the driven shaft, and a transmission mechanism provided at the bottom of the belt groove of the drive pulley, when the pulley diameter of the drive pulley is at its minimum. A pulley type transmission has a clutch mechanism that cuts off the transmission of rotation between the drive shaft and the drive pulley to a neutral state, and by connecting a rotating member to the transmission mechanism, the rotating member can be used as a transmission. The structure is such that the rotation is biased so that it is in a neutral state.

Further, the hook disengagement means includes a connecting member having one end connected to the other end of the ratchet hook, and a rotatable emergency lever connected to the other end of the connecting member, and the emergency lever can be rotated. It is configured such that the engagement between the claw portion of the ratchet hook and the engagement tooth portion of the ratchet gear is released by operation.

Furthermore, in the invention described in claim (3), in order to stop the operating lever at an arbitrary position and position the operating lever steplessly, the ratchet hooks are provided in plurality,
The lengths from the center of rotation of the plurality of ratchet hooks to the pawls are different from each other within the range of one pitch of the engagement teeth of the ratchet gear.

(Operation) According to the above-mentioned 11.
When the operating lever is not switched, the ratchet hook supported by the rotating member is urged to rotate by the urging means, and its pawl engages the engagement teeth on the outer periphery of the ratchet gear. The operating lever is positioned by engagement.

At this time, since the biasing means rotates and urges the pawl of the ratchet hook to engage with the engagement teeth of the ratchet gear, the engagement between the pawl and the locking portion is ensured. Then, the rotating member is held unrotatable. Therefore, even if a load is applied from the switched device connected to the rotating member, the rotating member will not rotate, and the operating lever will not deviate from the intended switching position.

When switching the state of the switched device from this state,
Switch the operating lever so that the rotating member rotates in a direction opposite to the biasing direction. As the operating lever is operated, an elastic body interposed between the operating lever and the rotating member is deformed, and only the operating lever is tilted by a predetermined angle with respect to the rotating member.

Since a hook push-up bar is integrally fixed to this operating lever, the push-up bar is tilted by the relative tilting of the operating lever, and this push-up bar causes the ratchet hook to resist the biasing force of the biasing means. The claw portion is rotated, and the engagement between the claw portion and the engagement tooth portion of the ratchet gear is released. In this disengaged state, the rotating member is rotatable, so when the operating lever is further operated, the rotating member follows the movement of the operating lever and rotates. The state of the switched device can be switched by rotation. Then, when the operation of the operating lever is stopped at the desired switching position, the rotation of the ratchet hook by the push-up bar is stopped, and the claw portion and the engaging tooth portion of the ratchet gear are engaged again. The operating lever is positioned at the desired position.

During such a switching operation, the engagement between the ratchet hook and the ratchet gear is released simply by tilting the operating lever with respect to the rotating member against the biasing force of the biasing means, and the device to be switched is then switched. Since it is only necessary to rotate the operating lever in order to perform the switching operation, the switching operation force can be reduced.

When the hook engagement release means is activated, the ratchet footer rotates against the urging force of the urging means and disengages from the ratchet gear, regardless of the switching position of the operating lever. . Since the rotating member is urged to rotate in one direction, it immediately rotates in the same direction upon the above-mentioned disengagement. This rotation brings the switched device into a predetermined state, and therefore the switched device can be quickly shifted to the predetermined state.

In the invention set forth in claim (2), although the rotating member is rotationally biased in the direction in which the gear ratio becomes low speed due to the load of the pulley type transmission as the switching device, the same Through this action, the operating lever can be reliably positioned and held, and the operating force of the operating lever when switching the gear ratio of the transmission can be reduced.

Further, in an emergency, when the clutch mechanism is operated to switch the transmission to the neutral state, the emergency lever is operated. With this operation, Ratchet! - The hook rotates and its pawl disengages from the engagement teeth of the ratchet gear. Therefore, as the rotating member rotates, the operating lever supported by it also rotates to the low speed side at once, and as a result, the drive pulley opens to the maximum and the clutch mechanism operates, causing the connection between the drive shaft and the drive pulley. A neutral state occurs where power transmission is cut off. Therefore, the transmission can be brought into the neutral state quickly.

In the invention set forth in claim (3), the lengths from the rotation center to the claw portion of the plurality of ratchet hooks are different from each other within the range of one pitch of the engagement tooth portion of the ratchet gear, so that the non-operating lever is In the operating state, at least one of the plurality of ratchet hooks engages with the engagement teeth of the ratchet gear, and the number of stopping positions of the operating lever increases by the difference in length of the plurality of ratchet hooks, so that the operation The operating lever can be positioned steplessly by stopping the lever at any position.

(Example) Embodiments of the present invention will be described below based on the drawings.

In FIG. 3, reference numeral 1 denotes a known variable pulley type continuously variable transmission constituting the switching device in the present invention. This transmission 1 includes a driving pulley 4 and a driven pulley 5 respectively attached to a driving shaft 2 and a driven shaft 3 which are parallel to each other, and a V-belt B stretched between the pulleys 4 and 5.

Each of the above-mentioned pulleys 4.5 includes a fixed shaft 6 rotatably fixed to the drive shaft 2 and the driven shaft 3, and a movable shaft 7 disposed opposite to the fixed shaft 6 and capable of sliding on the shafts 2 and 3.
A belt groove 8 is formed between both sheaves 6 and 7 for hanging the belt B. The movable shaft 7 of each of the pulleys 4.5 is connected to a transmission mechanism 9 using a cam mechanism or the like, and by rotating the transmission lever 10 of the transmission t749, the movable shaft 7 moves toward and away from the fixed shaft 6. I try to let them do it. Also, the gears of both transmissions are connected to each other by a rod 11, and both pulleys 4 and 5 are synchronized with each other by rotation of the gear lever 10 of the driven side transmission mechanism 9. The gear ratio between the two shafts 2 and 3 is changed by opening and closing in opposite directions. Furthermore, this transmission 1 is provided with an inner peripheral clutch mechanism 12 that interrupts transmission of power between the shafts 2 and 3 to bring the shaft into a neutral state. That is, a bearing 12a is rotatably supported at the bottom of the belt groove 8 of the drive pulley 4 with respect to the drive shaft 2, so that the pulley diameter of the drive pulley 4 is the minimum and the pulley diameter of the driven pulley 5 is the maximum. When the gear ratio of the transmission 1 reaches the low-speed end, the belt B rides on the bearing 12a to cut off the transmission of rotation between the drive shaft 2 and the drive pulley 4, resulting in a neutral state. I have to. Furthermore, the transmission 1 has a characteristic in which the speed change lever 10 is biased so that the speed ratio becomes a neutral state at the low speed end when both pulleys 4.5 are rotating.

The operating lever positioning device for maintaining the gear ratio of the transmission 1 will be explained with reference to FIGS. 1 and 2.
In the figure, reference numeral 13 denotes a plate-shaped operating lever extending in the vertical direction for operating the transmission 1. It is operated by moving the operating part at the upper end in the front-rear direction (left-right direction in the figure), and the lower end is the operating lever 13. It is considered to be the proximal end.

Reference numeral 14 denotes a rotating member made of a plate material wider than the operating lever 13, and the intermediate portion of the rotating member 14 is attached to a fixed body (not shown) such as a transmission case via a horizontal support shaft 15. It is supported so that it can rotate in the front and rear directions. A mounting hole 14a is formed at the lower end of this rotating member 14.
A shift lever 10 of a drive pulley measuring speed mechanism 9 of the transmission 1 is drivingly connected to 4a via a link or the like (not shown). Therefore, the rotating member 14 is rotated in a clockwise direction (second direction) in FIG.
It is urged to rotate in the counterclockwise direction (in the figure).

A pair of side plates 14b and 14c are formed in the upper half of the rotating member 14, facing each other in the front and back, rising upward from the front and rear edges thereof, and these side plates 14b.

The lower half of the operating lever 13 is disposed between 14c. The lower end of the operating lever 13 is connected to the rotating member 14 via a horizontal fulcrum pin 16 directly above the support shaft 15 . In addition, a pair of elastic bodies 17 and 17 made of compressed rubber are interposed in a filled state in the gap between the lower end of the operating lever 13 and the side plates 14b and 14c of the rotating member 14, respectively. The operating lever 13 is connected and supported by the body 17.17 so as to be relatively tiltable by a predetermined angle along the rotating direction of the rotating member 14 until it comes into contact with the side plates 14b, 14c.

A disk-shaped ratchet gear 18 is fixed to the fixed body, and the ratchet gear 18 has a disk shape centered on a support shaft 15 that is the center of rotation of the rotating member 14 . On the outer periphery of the ratchet gear 18, a plurality of engagement teeth 18a are provided on the front upper half.

18a, . . . are formed.

Further, at the upper end of the back surface of the rotating member 14, there are three ratchet hooks 1 in the shape of approximately circular arc plates, which are overlapped in the front and back directions.
9,19. ... is the horizontal support shaft 2 at the middle part.
It is rotatably supported by 0. At one end of each ratchet hook 19, the engaging tooth portions 18a, 18a, . . . A claw portion 19a that can be fitted together is formed. And these three ratchet hooks 19.19. Length Ω1 from the center of rotation to one end claw portion 19a, 19B, ...
-g3 are different from each other within the range of one pitch of each engaging tooth portion 18a of the ratchet gear 18.

Furthermore, the three ratchet hooks 19, 19.・・・
A tension spring 21, 21 . . . serving as a biasing means is provided between the vicinity of the claw portions 19 a, 19 a, . . . and the upper rear side of the ratchet gear 18. . . . (only one of them is shown) is attached, and the tension spring 21 urges the ratchet hook 19 to rotate counterclockwise in FIG. The engaging tooth portions 18a, 18 of
a, . . .

Further, a hook push-up rod 22 is integrally fixed to the intermediate portion of the operating lever 13 to rotate the ratchet hook 19 clockwise in FIG. 1 against the biasing force of the tension spring 21. ing. This hook push-up rod 22 extends forward from the middle part of the operating lever 13 to a position below each ratchet hook 19, and its tip is bent horizontally below each ratchet hook 19 parallel to the support shaft 20. . When the operating lever 13 is operated to rotate the rotating member 14 in the opposite direction to the biasing direction and tilts forward with respect to the rotating member 14, the hook push-up rod 22
Three ratchet hooks 19, 19.・
Push up the tip of the ratchet hook 1 against the biasing force of the tension spring 21 and rotate it clockwise in Figure 1.
9,19. . . and the engagement teeth 18a, 18a, . . . of the ratchet gear 18 are released.

On the other hand, at the other end of each ratchet hook 19, the ratchet hook 19 is rotated clockwise in FIG. 1 against the biasing force of the tension spring 2 to release the engagement with the ratchet gear 18. A hook disengagement mechanism 23 is connected. The disengager groove 23 has a wire 24 as a connecting member, one end of which is connected to the other end of the ratchet hook 19.

As shown in FIG. 1, the other end of this wire 24 is connected at its lower end to the middle part of an emergency lever 25 which is rotatably supported by a fixed body. The claw portion 19a of the ratchet hook 19 is disengaged from the engagement tooth portions 18a, 18a, . . . of the ratchet gear 18 by a dynamic operation. Further, a bracket 26 is attached to the vertical center of the rear side plate 14c of the rotating member 14, and the bracket 26 has a wire 24 attached thereto.
A wire guide 27 made of a tube that movably guides and supports the wire is fixed. The exposed wire between the end of the wire guide 27 and the other end of the ratchet hook 19
A push spring 2 made of a coil spring is placed around the wheel 24.
8 is disposed, and the push back force of the push spring 28 works with the tensile force of the tension spring 21 to push the other end of each ratchet hook 19, and the ratchet hook 19 is moved to the claw portion 1.
9a is the engagement tooth portion 18a, 18'a of the ratchet gear 18
.

It is biased to rotate so as to engage with...

Next, the operation of the above embodiment will be explained.

When the operating lever 13 of the continuously variable transmission 1 is not operated to change gears, the claw portion 19a of each ratchet hook supported by the rotating member 14 engages the engaging tooth portions 18a, 18a, . The operating lever 13 is positioned by this engagement.

In that case, one ratchet hook is one ratchet hook.
Due to the tensile force of the tension spring 21 between 9 and the ratchet gear 18 and the push back force of the push spring 28 around the wire 24,
The claw portion 19a is the engagement tooth portion 13a of the ratchet gear 18.
+ 18 a+ ..., so that the claw portion 19a and the engaging tooth portions 13a, 18a,
... are reliably engaged, and the rotating member 14 is firmly held so as not to rotate in the clockwise direction in FIG. Therefore, even if the gear ratio of the continuously variable transmission 1 attempts to change toward the neutral state due to a disturbance and a load is applied to the rotating member 14 from the gear lever 10, the rotating member 14 will not rotate. Therefore, the operating lever 13 can be reliably held at a predetermined switching position and the gear ratio of the transmission 1 can be fixed.

In addition, the three ratchet footers 19, 19°...
The length j7 between the center of rotation and the claw portions 19a, 19a,...
+~Ω3 is the ratchet gear] 1 of each engaging tooth portion 18a of 8
Since the lengths are set to be different from each other within the pitch range, when the operating lever 13 is not operated, any of the three ratchet hooks 19, 19°... 18a, 18a, . . . For this reason, the three ratchet hooks 19, 19. The stopping positions of the operating lever 13 can be increased step by step by the difference in length, and therefore the operating lever 13 can be stopped at any position and positioned steplessly.

When switching the gear ratio of the transmission 1 from this state to the high speed side, the operating lever 13 is rotated forward (counterclockwise in FIG. 1) to switch to the desired switching position. Since an elastic body 17.17 is interposed between the operation lever 13 and the rotating member 14, the elastic body 17.17 is compressed and deformed at the initial stage as the operation lever 13 rotates. Due to the deformation of this elastic body 17.17, the operating lever 13
The only part tilts forward by a predetermined angle relative to the rotating member 14. Due to this relative tilting displacement of the operation lever 13 with respect to the rotation member 14, the hook push-up bar 22 integrated with the operation lever 13 also tilts with respect to the rotation member 14, and due to the tilting of this push-up bar 22, the three Ratchet hook 19, 19.
The claw portion 19a of...

19a, . . . are all the above-mentioned tension springs 21 and push springs 2.
8, the claw portion 19a disengages from the engagement teeth 18g, 18a, . . . of the ratchet gear 18, and this disengagement allows the rotating member 14 to move smoothly. It becomes possible to rotate. Thereafter, when the operating lever 13 is rotated further forward, the operating lever 13 comes into contact with the front side plate 14b of the rotating member 14, and the two are integrally engaged and rotated. The member 14 follows the rotation of the operating lever 13 and rotates in the same direction (counterclockwise in FIG. 1), and the rotation of the rotating member 14 changes the gear ratio of the transmission 1.

When switching the operation lever 13, the tension spring 2
1 and the push spring 28 to disengage the ratchet hook 19 and the ratchet gear 18, and then only the gear change of the transmission 1 is performed, so the operation lever 13 is relatively small. It can be switched by operating force.

Thereafter, when the operating lever 13 is stopped rotating at the desired switching position, the relative tilting displacement between the operating lever 13 and the rotating member 14 is eliminated due to the restoring force of the elastic body 17° 17 in the compressed state. The push-up of the ratchet hook 19 by the hook push-up rod 22 is returned to its claw portion 19a.
and the engaging tooth portions 18a, 18a, . . . of the ratchet gear 18.
- are re-engaged, thereby positioning the operating lever 13 at the desired position.

When the transmission 1 is placed in a neutral state to cut off power transmission in an emergency, the hook engagement release mechanism 2
Operate the emergency lever 25 at step 3. With this operation, the wire 24 moves and the other end of each of the ratchet hooks 19 is pulled, and the ratchet hook 19 is pulled by the tension spring 2.
1 and the push-back force of the push spring 28, it rotates clockwise in FIG. Due to this rotation, the claw portion 19a and the tooth portion 18a of the ratchet gear 18, as described above,
Since the engagement with 18a, . . . is disengaged, the rotation member 14
The operating lever 13 is suddenly rotated toward the low speed side by the biasing force in the neutral direction of the transmission 1 and the tensile force of the tension spring 21, and the rotation of the rotating member 14 causes the bearing at the bottom of the belt groove 8 of the drive pulley 4 to rotate. The belt B rides on the belt 12a, and the transmission 1 enters the neutral state. Therefore,
In an emergency, the transmission 1 can be quickly switched to the neutral state without requiring the operation of the operating lever 13.

Note that when the operating lever 1 is not operated, the ratchet hooks 19, 19 . ...and ratchet gear 18
Since these are engaged, the operating lever 1 cannot be operated to the low speed side as it is. Therefore, when switching the gear ratio of the transmission 1 to the low speed side, as in the case of the above-mentioned emergency operation, the transmission 1 is brought into a more neutral state by operating the emergency lever 25, and then the operating lever
3 to the desired shift position and operate it to the high speed side.
It is possible to substantially switch to the lower speed side.

In the above embodiment, the elastic bodies 17 and 17 interposed between the operating lever 13 and the rotating member 14 are made of compressed rubber, but springs may also be used. However, it is preferable to use compressed rubber as in the above embodiment because it is inexpensive and easy to install.

Furthermore, it goes without saying that the present invention can also be applied to the case of switching devices other than the pulley type transmission 1.

(Effect of the invention) As explained above, according to the invention described in claim (1),
When the operation lever is not operated, the claw at one end of the ratchet hook is engaged with the engagement teeth on the outer periphery of the ratchet gear by the biasing means, and the device to be switched is rotated and biased to a predetermined state. When the rotation of the movable member is stopped and the switching operation is performed, the ratchet hook is rotated against the biasing force of the biasing means by utilizing the relative tilting displacement between the operating lever and the rotary member, and the claw portion is rotated. At the same time, a hook engagement release means is connected to the other end of the ratchet footer, and the engagement release means forcibly releases the engagement between the ratchet footer and the ratchet gear. By doing so, it is possible to reliably prevent an increase in the operating force of the operating lever in the positioning device and the return of the operating lever, and also to quickly switch the switched device to a predetermined state by the hook engagement release means. be able to.

Further, according to the invention set forth in claim (2), there is provided a pulley type transmission having a characteristic that the device to be switched is biased to be in a neutral state, and the engagement release means has an emergency lever. By simply operating the emergency lever, the transmission can be switched to the neutral state, allowing quick switching.

Furthermore, according to the invention as set forth in claim (3), the ratchet hooks are plural, and the length of the ratchet hooks from the center of rotation to the claw portion is within the range of one pitch of the engaging tooth portion of the ratchet gear. Since they are different from each other, the number of stopping positions for the operating lever increases by the difference in length between the multiple ratchet gears. Therefore, the operating lever can be stopped at any position and the operating lever can be positioned steplessly, making delicate position adjustments possible. It can be performed.

[Brief explanation of drawings]

FIG. 1 is a front view of a positioning device according to an embodiment of the present invention;
FIG. 2 is a rear view of the same, and FIG. 3 is a sectional view of the transmission. FIG. 4 is a front view showing a conventional example of a positioning device. 1... Pulley type transmission (switched device) 2... Drive shaft 3... Driven shaft 4... Drive pulley 5... Driven pulley B... Belt 8... Belt groove 9. ...speed change mechanism 12...clutch mechanism 13...operation lever 14...rotating member 17...elastic body 18...ratchet gear 18a...engaging tooth portion 19...ratchet hook 19a ...Claw parts g1 to g3...Length from the center of rotation of the ratchet hook to the claw part 21...Tension spring (biasing means) 22...Hook push-up bar 23...Hook engagement Release mechanism 24...Wire 25...Emergency lever patent applicant Band - Kagaku Co., Ltd. - 7 parts. Agent Patent attorney former 1) Hiroshi (Hajiki 4J 2 people) 1
... Pulley type transmission (switched device) 2 ... Drive shaft 3 ... Driven wheel 4 ... Drive pulley 5 ... Driven pulley B ... Belt 8 ... Belt groove 9 ...・Transmission mechanism 12...clutch device 1ti 13...operation lever 14...rotating member 17...elastic body 18...ratchet gear 18a...engaging ridge 19...ratchet hook 19a ...Claw portions 11 to g3...Length from the center of rotation of the ratchet hook to the claw portion 21...Tension spring (biasing means) 22...Hook push-up bar 23...Hook engagement Release mechanism 24...Wire 25...Emergency lever

Claims (3)

[Claims] (1) A rotating member whose intermediate portion is rotatably supported by a fixed body, whose one end is drivingly connected to the switched device, and which is biased to rotate in one direction so that the switched device is in a predetermined state. , the base end of which is connected and supported by an elastic body to the other end of the rotating member, and an operating lever that can be relatively tilted by a predetermined angle along the rotating direction of the rotating member; a ratchet gear having a plurality of engagement teeth arranged in an arc shape around the rotation center of the rotation member; an intermediate portion rotatably supported by the other end of the rotation member;
a ratchet hook having a pawl portion at one end capable of engaging with the engaging tooth portion of the ratchet gear; and urging means for urging the ratchet hook so that the pawl portion engages with the engaging tooth portion of the ratchet gear. is fixed to the operating lever, and when the operating lever is operated to rotate the rotating member in a direction opposite to the urging direction and is tilted relative to the rotating member, the ratchet hook is moved by the urging force of the urging means. a hook push-up bar that is rotated against the force of the force to release the engagement between the pawl and the engagement teeth of the ratchet gear, and a biasing force of a biasing means that is connected to the other end of the ratchet hook; 1. A positioning device for an operation lever, comprising: a hook disengagement means for disengaging the engagement between the pawl and the engagement teeth of the ratchet gear by rotating the lever against the force. (2) The device to be switched consists of a driving pulley and a driven pulley each of which is a variable pulley attached to a driving shaft and a driven shaft, respectively, a V-belt placed between the two pulleys, and a pulley diameter of each pulley that is changed. A transmission mechanism that changes the gear ratio between the drive shaft and the driven shaft, and a transmission mechanism that is installed at the bottom of the belt groove of the drive pulley, cuts off the transmission of rotation between the drive shaft and the drive pulley when the pulley diameter of the drive pulley becomes the minimum. The rotating member is connected to the transmission mechanism and is biased to rotate so that the transmission is in the neutral state, and the hook is disengaged. The means includes a connecting member having one end connected to the other end of the ratchet hook, and a rotatable emergency lever connected to the other end of the connecting member, and the pawl portion of the ratchet hook is rotated by rotating the emergency lever. 2. The operating lever positioning device according to claim 1, wherein the operating lever positioning device is configured such that the engagement between the lever and the engagement tooth portion of the ratchet gear is released. (3) A plurality of ratchet hooks are provided, and the lengths of the plurality of ratchet hooks from the center of rotation to the claw portion differ from each other within the range of one pitch of the engagement tooth portion of the ratchet gear. Characteristic claim (1) or (2)
Positioning device for the operating lever described.