JPH10119851A - Side stand device for motor bicycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a side stand device which can prevent the output of an engine from being carelessly increased in a state that a car body is in an upright position, is inexpensive, and is simple in constitution. SOLUTION: A throttle cable capable of being inserted into a guide tube 16a in such a way as to be freely advanced/retreated, is so placed as to pass through a place close to the rocking fulcrum of an unit swing type engine, concurrently, a cable locking mechanism 20 locking/releasing the throttle cable, is provided, and the cable locking mechanism 20 is formed out of a projecting member projected out of the cable, of a locking body which is provided in such a way that it can be advanced to/retreated from an abutting position preventing the cable from being moved to the direction that the opening of a throttle valve is increased, and a non-interference position with the aforesaid projected member, and of a locking body moving mechanism which moved the locking body to the abutting position by moving a side stand 3 to an upright position, and also moves the locking body to a non-interference position by moving the side stand 3 to its housing position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motorcycle side stand apparatus which suppresses driving of an engine when the motorcycle stands on a side stand to improve safety.

[0002]

2. Description of the Related Art As is well known, a motorcycle is provided with a side stand as a means for keeping a vehicle body in an upright state. However, when a passenger gets off the motorcycle and the vehicle body is kept upright by a side stand. When the throttle is operated, the rear wheels spin at high speed or start carelessly, which is extremely dangerous. For this reason, conventionally, the following various techniques have been proposed and implemented for the purpose of avoiding the above-described danger when the side stand is used.

For example, (a) when the side stand is set to the upright position, the driving of the engine stops (see Japanese Patent Application Laid-Open No. 64-22588). (B) When the side stand is set to the upright position, manual operation is performed. (C) When the side stand is set to the upright position, the linkage between the throttle grip and the carburetor slot valve is cut off (see Japanese Patent Publication No. 61-4167). Reference).
(D) When the stand is set to the upright position, the throttle cable is pulled in the direction in which the throttle valve closes to prevent the carburetor throttle valve from opening (see Japanese Patent Application Laid-Open No. 55-145074).
(E) Detecting means for detecting the standing state of the side stand is provided, and when the standing state is detected, the number of times of operation of the ignition circuit is limited to cause a misfire, so that the number of rotations of the automatic centrifugal clutch is equal to or less than the rotational speed. In order to reduce the number of revolutions of the engine (see Japanese Patent Publication No. 3-20598), there has been considered.

[0004]

However, each of the above prior arts has the following problems. That is, according to the technique described in (a) above, if the side stand is used when parking and starting are frequently repeated, such as in a delivery operation, the engine stops every time and the engine is started every time the vehicle starts. The operation is inconvenient, and is inconvenient. Also, by repeatedly starting with a large amount of power consumption, the charge amount of the battery is significantly reduced, and so-called battery rising occurs. Also,
The technique described in (b) cannot be applied to a motorcycle having a drive force automatic intermittent function such as a centrifugal clutch in a power transmission mechanism. In the technology described in (c),
A mechanism for interrupting the connection between the throttle grip and the carburetor throttle valve is complicated. According to the technique described in (d), the side stand is retracted when the cable pulling force by the throttle grip is strong because the throttle cable is pulled on the side stand side against the pulling force of the throttle grip. There is also a possibility that it will jump up to the position, and in order to prevent this, it is necessary to provide a complicated lever mechanism on the side stand side.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and it is possible to set a side stand in an upright state without stopping an engine, and irrespective of a type of a power transmission mechanism. It is an object of the present invention to provide a motorcycle side stand device having an inexpensive and simple configuration that can reliably use a side stand.

[0006]

SUMMARY OF THE INVENTION The present invention has an engine and a power transmission mechanism for transmitting the driving force of the engine to the rear wheels while supporting the rear wheels rotatably. Equipped with a unit swing type engine supported so as to be able to swing up and down together with the rear wheel around the swing fulcrum, and move the cable forward and backward in accordance with the operation of the throttle grip. In a motorcycle in which the opening of a throttle valve of a carburetor fixed to an engine is adjusted, the cable is disposed so as to pass near a swing fulcrum of a unit swing type engine, and the vehicle body is kept upright. A side stand provided so that the position can be set between a standing position and a predetermined storage position separated from a road surface, and the side stand is placed in a standing position. A cable locking mechanism that locks the cable so that it cannot advance and retreat, and sets the side stand to the storage position to release the cable so that it can advance and retreat. A projecting member projecting at a position near the swing fulcrum of the cable, and an abutting end of the projecting member when the throttle valve is at a predetermined opening, the cable being moved in the direction of increasing the opening of the throttle valve. A locking member movably provided between a contact position for preventing movement and a non-contact position with the protruding member, and the locking member being brought into contact with the side stand by moving the side stand to a standing position. And a locking member moving mechanism for moving the locking member to a non-contact position by moving the side stand to a storage position while moving the throttle stand. The blanking opening, kept below a predetermined value when the side stand is in the upright position,
When the side stand is in the storage position, it can be set to a certain value or more.

In the above configuration, when the side stand is in the retracted position, the projecting member protruding from the throttle cable is in the non-contact position with the locking member, so that the cable can be freely moved in accordance with the operation of the throttle grip. The opening and closing of the throttle valve can be performed properly. Further, when the side stand is set to the standing position, the locking body moves to the contact position. As a result, even if the throttle grip is operated to increase the opening of the throttle valve, the movement of the cable is prevented because the projecting member protruding from the cable comes into contact with the locking member, and the increase in engine output is prevented. Is done. As a result, there is no danger that the rotational speed of the wheels will increase inadvertently during parking or the like. Further, since the protruding member is provided near the swing support point of the cable, even if the carburetor swings together with the unit swing type engine, the length of the cable route from the carburetor to the protruding member does not change. No excessive force is applied to the cable.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 6 without FIG. 1 is a view showing a first embodiment of the present invention, FIG. 1 is a side view showing a motorcycle to which the embodiment is applied, and FIG. 2 is an explanatory side view showing an entire configuration of the embodiment. 3, FIG. 3 is an enlarged view of a main part of what is shown in FIG. 2, FIG. 4 is an exploded perspective view showing the internal structure of the cable locking mechanism shown in FIG. 3, and FIGS. It is a perspective view which shows the setting state of a board.

A motorcycle 1 shown in FIG. 1 has a highly practical body suitable for a delivery service such as newspaper delivery, and a frame 2 forming a framework of the body is inclined downward from a front end. After that, it has a substantially U-shape in side view, which rises up again diagonally, and a fork 4 supporting the front wheel 3 is held at the front portion thereof, and a storage basket for storing luggage such as deliveries is provided. 5 is attached. Further, a side stand 6 for keeping the vehicle body in an upright state when parking or the like is provided at a rear portion of the frame 2. As shown in FIG. 3, the side stand 6 is rotatably supported by a shaft 9 on a stand bracket 8 fixed to a lower portion of the frame 2 by bolts 7.
The side stand 6 is provided with a coil spring 10 stretched between the side stand 6 and the stand bracket 8, and a substantially horizontal storage position where the side stand 6 is not in contact with the ground, and a standing position where the side stand is in contact with the ground (in FIG. (Indicated by a dashed line).

A unit swing type engine 12 for rotatably supporting a rear wheel 11 is supported on the lower rear side of the frame 2 so as to be vertically swingable about a pivot (a swing fulcrum) 13. A cushion unit 14 is connected between the unit swing type engine 12 and an upper rear portion of the frame 2. The unit swing type engine 12 includes a rear wheel 1 as well known.
1 and a driving force transmission device including a centrifugal clutch for transmitting the driving force of the engine to the rear wheels is integrally supported. It is moving.

The unit swing type engine 1
A carburetor 15 for supplying an air-fuel mixture to the engine is fixed to the upper end of 2, and swings together with the unit swing type engine 12. The carburetor 15 incorporates a well-known throttle valve for adjusting the amount of air-fuel mixture supplied to the engine, and a throttle grip 19 is connected to the throttle valve via a throttle cable 16 to rotate the throttle grip 19. The opening degree of the throttle valve is adjusted by the dynamic operation. The throttle cable 16 is inserted into a guide tube 16a disposed from the throttle grip 19 to the carburetor so as to be able to advance and retreat, and the guide tube 16a forms a movement path. The guide tube 16a forming this movement path is disposed so as to pass near the pivot 13, and a cable locking mechanism 20 is inserted into the throttle cable 16 near the pivot 13.

The cable locking mechanism is fixed to a protruding piece 8a welded to the stand bracket 8 as shown in FIG. 3, and its internal structure is configured as shown in FIG. That is, the cable locking mechanism 20 is configured to close the throttle cable 1 near the pivot 13.
6, a connector 21 as a projecting member, a locking member 22 provided to be able to advance and retreat at a contact position and a non-contact position with the connector 21, and the locking member 22 is moved to the contact position. And a locking body moving mechanism for selectively moving between a non-contact position and a non-contact position.

The connector 21 has an elliptical column shape and has two slits 21a, 21a formed therein.
b, an end portion 17a of a throttle cable 17 connected to a throttle grip 19 and an end portion 18a of a throttle cable 18 connected to a throttle valve of the carburetor 15 are respectively irremovably locked. End 1 of both throttle cables 17, 18
By connecting 7a and 18a differently, a throttle cable 16 from the throttle grip 19 to the throttle grip of the carburetor 15 is formed. In addition, the locking body 22 includes a plate-shaped locking portion 22a having a rectangular front shape, and a rod-shaped operating portion 22b connected to the locking portion 22a. Oval insertion hole 22 for movably inserting the connector 21
a1 is formed, and a cutout portion 22a2 for inserting one throttle cable 17 is continuously formed in the upper end portion of the insertion hole 22a1.

The locking body moving mechanism includes a pair of front and rear body parts 2 which are divided so as to be guided so as to move on both sides of the locking portion 22a of the locking body 22 and move in the vertical direction.
3, 24, a coil spring 26 for urging the locking portion 22a upward, and a tension spring 27 for connecting the side stand 6 and the operating portion 22b. Here, the front body portion 23 located on the throttle grip side and the rear body portion 24 located on the carburetor side are joined to each other with screws. A locking portion storage space S1 is formed to guide both side portions of the stop plate and move in the vertical direction, and a lower end portion of the lower portion has an operating portion insertion space for inserting the operating portion 22b and the coil spring 26. S2 is formed, and a spring receiver 26a for engaging the lower end of the coil spring 26 is formed at the lower end thereof. Further, each of the main body portions 23 and 24 has a cylindrical portion 23a, 2 having an elliptical peripheral shape for accommodating the connector 21.
4a, and insertion holes 23a1 and 24a1 for inserting the throttle cables 17 and 18 are formed at the bottom of each of the tubular portions 23a and 24a.

Next, the operation based on the above configuration will be described.
During traveling, the side stand 6 is set to the storage position (shown by a solid line in FIG. 1) in order to avoid contact with the ground. At this time, the cable locking mechanism 20 is in the initial state,
The locking portion 22a of the locking body 22 is pushed upward by the urging force of the coil spring 26 as shown in FIG.
The insertion hole 22a1 of the locking portion 22a is
And the connector 21 is set at a position (non-contact position) at which the connector 21 can be inserted.
4 and the inside of the insertion hole 22a1 of the locking body 22 can be freely advanced and retracted. Therefore, in this state, the throttle cable 16 (17, 18) can be appropriately moved together with the connector 21 by operating the throttle grip 19, and the opening of the throttle valve of the carburetor 15 can be adjusted appropriately, which is necessary. The driving state can be obtained. When the throttle grip 19 is released, the throttle cable 16 has an opening degree that keeps the engine idling, and the connector 21 is completely housed in the cylindrical portion 24a of the rear main body portion 24 so that the locking member can move up and down. Is held in a position that does not hinder the movement.

During traveling, the unit swing type engine 12 swings about the pivot 13 together with the rear wheel 12 in accordance with the unevenness of the road surface, etc., and the cable locking mechanism 20 is located near the pivot 13. Even if the unit swing type engine 12 swings, the locking mechanism 20
The arrangement path length of the guide tube 16a and the cable 18 from the carburetor 15 to the carburetor 15 hardly changes. For this reason,
The guide tube 16a and the cable 18 are not forcibly stretched or unnecessarily slackened, and accurate throttle valve opening control according to the operation amount of the throttle grip 19 can be performed.

On the other hand, when parking the motorcycle, the side stand 6 is moved from the storage position to the standing position (indicated by a dashed line in FIG. 1) to keep the motorcycle in an upright state. As a result, the operating portion 22a of the locking body 22 is pulled downward, and the locking body 22 moves downward against the urging force of the coil spring 26 as shown in FIG. Note that the throttle cable 17 is
2 is inserted into the notch 22a2. Thus, the locking body 2
2 to lower the locking portion 22a of the locking body 22.
Is opposed to the end surface of the connector 21 on the throttle grip 19 side, and the movement of the connector 21 to the throttle grip 19 side is prevented. In this state, even if an attempt is made to rotate the throttle grip 19 in the direction in which the opening of the throttle valve increases, the throttle cable 16 does not move because the connector 21 abuts on the locking member 22, and the throttle grip 1
The rotation of 9 is blocked. Therefore, in the side stand standing state, there is no possibility that the output of the engine may be erroneously increased, and careless starting and the accompanying fall, and the idling of the rear wheel 11 do not occur.
Safety can be sufficiently ensured.

Even if the throttle grip 19 is strongly rotated, only the pulling force of the throttle cable 16 is applied to the locking member 22 and does not affect the side stand 6 at all. The side stand is not flipped up to the storage position by the throttle cable 16. Also, the cable locking mechanism 2
0 in the initial state of the throttle valve 19,
If the side stand 6 is set up in a state where idling is performed in advance, the engine does not stop even when the side stand 6 is in the upright state. It is no longer necessary to carry out every start.

In the first embodiment, the operating portion 22a of the locking member 22 is loosely inserted into the space S2 formed by the main bodies 23 and 24, and the space S2 and the operating portion 22b are connected to each other. The relatively large gap formed between them functions as a discharge path for the moisture that has entered the main body parts 23 and 24. However, when the main body parts 23 and 24 need to be completely sealed, , FIG. 7 and FIG.
As in the embodiment, the boot 30 may cover the opening of the space S2 formed by the main bodies 23 and 24 and the upper half of the operating portion 22b. The boot 30 shown here is formed by forming a member having flexibility and waterproofness into a bellows shape and having elasticity in the longitudinal direction.
For the attachment, the main body 2 forming the space S2
Arc-shaped grooves 23c, 24c are formed on the outer circumference of the boots 30, and an annular projection 30a formed on the inner surface of the upper end of the boot 30 is tightly fitted and fixed. The protrusion 30b formed at the lower end of the boot 30 is closely fitted to the groove 22c formed at the bottom. The other configuration of the second embodiment is the same as that of the first embodiment. According to this, since the boot 30 is extendable, the hermetically sealed state of the main bodies 23 and 24 can be maintained without hindering the vertical movement of the locking body 22.

In each of the above embodiments, the side stand 6 and the operating portion 22b of the locking body 22 are connected by the tension spring 27. However, when the distance between the set position of the side stand 6 and the locking body 22 is large. In
Connect a predetermined cable to the tension spring 27,
It may be stretched between the side stand 6 and the locking body 22.

Next, a third embodiment of the present invention will be described. In the third embodiment, a cable locking mechanism 40 as shown in FIGS. 9 and 10 is provided near the pivot of the unit swing type engine 12 instead of the cable locking mechanism 20 in each of the above embodiments. is there. That is,
The cable locking mechanism 40 shown here comprises a main body 41 having a cylindrical inner peripheral surface 41a, and a substantially columnar locking member 42 sliding on the inner peripheral surface 41a along the center axis direction.
A connector (projecting member) 43 for connecting the throttle cable 18 connected to the throttle valve of the carburetor 15 and the throttle cable 17 connected to the throttle grip 19 (in the form of an elliptical cylinder);
2 and a return spring 44 interposed between the bottom 42A of the second body 41 and the bottom 41A of the main body 41 to urge the locking body 42 upward.

The connector 43 has an elliptical cross section, and one end of the connector 43 is slidably fitted to the curved surface 41c of the main body 41. As shown in FIGS. 9 (b) and 10, the locking member 42 has a central axis direction (throttle cable moving direction) at an intermediate portion thereof.
Notch 42a is formed along a direction orthogonal to the first plane 42a and the first flat surface 42a and the second
Are formed. The notch groove 42a has such a size that the connector 43 can be fitted therein, and the fitted connector 43 can move in the direction orthogonal to the central axis along the notch groove 42c. I have. Further, a rod-shaped operating portion 42d protrudes from a bottom portion 42A of the locking body 42, and a lower end portion thereof projects outward from an insertion hole 41A1 formed in the bottom portion 41A of the main body portion 41, and the As in the first embodiment, a tension spring 27 connected to the side stand 6 is connected. The locking body moving mechanism in this embodiment includes the main body 41 that guides the locking body movably, the coil spring 44 that biases the locking body 42, the side stand 6, and the operating section 42d. And a tension spring 27 for connecting

In the third embodiment of the present invention having the cable hooking mechanism 40 configured as described above, when the side stand 6 is set to the storage position,
9A and 9C, the upper surface 42B of the head of the locking body 42 is held in contact with the inner surface 41B of the head of the main body 41 by the urging force of the return spring 44. (Shown by solid lines in FIGS. 9A and 9C). At this time, since the connector 43 is located at a position matching the notch groove 42a, the connector 43 is freely movable in the notch groove 42a. Therefore, in this state, the throttle cables 17 and 18 can be freely moved in accordance with the operation of the throttle grip 19, and the opening of the throttle valve can be appropriately adjusted. When the throttle grip is released, the connector 43 is connected to the locking body 4.
It has escaped from the second notch groove 42c.

When the side stand 6 is moved to the upright position to park and stop the motorcycle, the actuating portion 42d is pulled downward via the tension spring 10, and the entire locking member 42 moves downward. I do. This allows
The notch groove 42 c of the locking body 42 moves to a position not facing the connector 43, and the first flat surface 42 a faces the connector 43. As a result, the movement of the connector 43 is stopped by contacting the first flat surface 42a, and the throttle cable 1
6 and 17 also become unmovable, and are kept at the minimum opening of the throttle valve, for example, the opening at which idling is possible. Therefore, also in the third embodiment, when the motorcycle is parked and stopped at the side stand 6, there is no danger of erroneously increasing the output of the engine. In the third embodiment, the main body 4
The gap formed between the insertion hole 41A1 formed in the bottom portion 41A of the first member 1 and the operating portion functions as a discharge path for water that has entered the main body portion 41, but completely seals the main body portion 41. If it is necessary to do so, a boot may be mounted over the operating portion 42d and the main body 41 in the same manner as in the second embodiment.

[0025]

As described above, in the motorcycle side stand device according to the present invention, the throttle cable from the throttle grip to the throttle valve is arranged near the pivot of the unit swing type engine, and the cable near this pivot is connected to the throttle cable. A cable locking mechanism is provided so that the opening of the throttle valve can be suppressed to a certain value or less when the side stand is in the upright position, and can be set to a certain value or more when the side stand is in the storage position. Therefore, when the side stand is erected and the vehicle body is erected, there is no danger that the output of the engine will be increased due to an erroneous operation of the throttle grip, and safety during parking and stopping can be ensured.

Further, since it is possible to set the side stand in an upright state without stopping the engine, even in the case of a delivery service in which the engine is stopped and started frequently, it is troublesome for every start and consumes a large amount of power. There is no need to perform a start-up operation, and work can be performed smoothly.
The burden on the battery can be reduced. In addition, the cable locking mechanism has a very simple configuration in which the protruding member protruding from the cable is locked by a locking body, so that the cable locking mechanism can be manufactured at low cost, and furthermore, regardless of the driving force transmission means and the like. Since it can be installed, it can be applied to various motorcycles, and excellent versatility can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view showing a motorcycle to which a first embodiment of the present invention is applied.

FIG. 2 is an explanatory side view showing the overall configuration of the first embodiment of the present invention.

FIG. 3 is an enlarged view of a main part of what is shown in FIG. 2;

FIG. 4 is an exploded perspective view showing the internal configuration of the cable locking mechanism shown in FIG.

FIG. 5 is a perspective view showing a setting state of a locking plate of the cable locking mechanism in a state where a side stand is erected.

FIG. 7 is a perspective view showing a setting state of a locking plate of the cable locking mechanism in a state where a side stand is stored.

FIG. 7 is a side view showing a second embodiment of the present invention.

FIG. 8 is an explanatory vertical sectional side view showing a fixed state of the boot shown in FIG. 6;

FIG. 9 is a view showing a cable locking mechanism according to a third embodiment of the present invention, wherein FIG. 9 (a) is a partially longitudinal side view, and FIG. 9 (b) is a cross-sectional view of FIG. Area view,
FIG. 3C is a cross-sectional view taken along the line cc of FIG.

FIG. 10 is a perspective view showing the locking body shown in FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Motorcycle 2 Frame 6 Side stand 11 Rear wheel 12 Unit swing type engine 13 Pivot (Swinging fulcrum) 15 Carburetor 16 Throttle cable 19 Throttle grip 20 Cable locking mechanism 40 Cable locking mechanism

Claims (1)

[Claims] An engine and a power transmission mechanism for transmitting a driving force of the engine to the rear wheel, and the like. The rear wheel is provided around a swing fulcrum provided on the frame. A carburetor fixed to the unit swing type engine in accordance with the operation of the throttle grip, moving the throttle cable forward and backward in accordance with the operation of the throttle grip. A motorcycle in which the opening degree of the throttle valve is adjusted, wherein the throttle cable is disposed so as to pass near a swing fulcrum of the unit swing type engine, and a standing position and a road surface for keeping the vehicle body in an upright state. A side stand that can be set to a predetermined storage position that is separated from the A cable locking mechanism that locks the throttle cable so that it cannot move forward and backward by setting the throttle cable to a retractable position, and releases the throttle cable so that it can move forward and backward by setting the side stand to the storage position. A locking mechanism, a protruding member protruding from a position near the pivot point of the cable, and an abutment on one end of the protruding member when the throttle valve is at a predetermined opening to increase the opening of the throttle valve. A locking member movably provided at a contact position for preventing movement of the cable and a non-contact position with the protruding member; and by moving the side stand to an upright position, the locking member is moved. A locking body moving mechanism for moving the locking body to a non-contact position by moving the side stand to the storage position while moving the locking body to the contact position; A side stand for a motorcycle, wherein the opening degree of the throttle valve is suppressed to a certain value or less when the side stand is in the standing position, and can be set to a certain value or more when the side stand is in the storage position. apparatus.