JP2002059878A - Weight shift device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a weight shift device for a vehicle such as a bicycle preferable for enabling to ride more lightly and comfortably. SOLUTION: A protruding part 10 is mounted upwardly on a frame 2 for having an arm 12 with a saddle 14 arranged in an oscillating way on a top of the protruding part 10 as a fulcrum to have one end 12a of the arm connected with a head pipe 3 side of the frame 2. A force dispersing metal fitting 20 adapted to disperse force to lift the head pipe 3 is mounted on the connecting part. Therefore weight is put more on a front wheel for reducing a load fraction of weight acting on a rear wheel and for reducing a lift of the front wheel by a lifting force of the head pipe 3 to reduce further the load fraction of weight acting on the rear wheel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for moving weight of a vehicle such as a bicycle, and more particularly to a device for improving the lightness and riding comfort of a running vehicle.

[0002]

2. Description of the Related Art Hitherto, bicycles have been widely known as easy-to-use vehicles that can be driven and driven manually, and this type of bicycle generally has a structure in which a rear wheel is driven to rotate by a pedal depressing force and travels. Is adopted.

[0003] However, in a bicycle, particularly a light bicycle for stable running, which has a high steering wheel, when the driver normally sits on the saddle, the front wheels and the rear wheels have a ratio of 4 to 6 respectively. Because the weight of the rear wheels, which are the driving wheels, is large and the dynamic frictional resistance between the rear wheels and the road surface is large, the pedal must be depressed strongly to rotate the rear wheels. The pedal feels heavy and is not convenient for speeding up or running uphill. Further, in the case of this kind of light vehicle, since the saddle is directly connected to the vertical pipe of the frame, there is also a problem that vibration during traveling is large and riding comfort is poor.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a bicycle suitable for enabling a lighter and more comfortable ride. And the like.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is directed to a projecting part which is installed upward on a frame of a bicycle or other vehicle, and is arranged so as to be swingable with a top part of the projecting part as a fulcrum. Arm provided, one end of the arm,
One end of the arm is connected to the head pipe supporting the front wheel of the frame, and a saddle is attached to the other end of the arm. A feature is provided in that a force distribution metal fitting for dispersing the lifting force is provided when trying to lift.

According to the present invention, the force distribution fitting is located on the front side of the head pipe, and a contact portion that contacts the outer peripheral surface of the head pipe from that position, and is located on the back side of the head pipe, The head pipe further includes a connecting portion connected to one end of the arm via a joining pin, and a contact portion that abuts a lower portion of the protrusion provided on the head pipe.

The present invention is characterized in that the convex portion is provided so as to be slidable in the front and rear wheel directions.

The present invention is characterized in that the arm is made of a spring material.

The present invention is characterized in that the frame is provided with a lateral vibration preventing member for preventing the lateral vibration of the arm.

In the present invention, the closer the position of the convex portion is to the front wheel side, the more weight is applied to the front wheel, and the proportion of weight burden on the rear wheel is reduced. Further, since the force dispersing bracket disperses the force for lifting the head pipe, the lifting of the front wheel due to the lifting force is reduced, and the proportion of the weight on the rear wheel is further reduced.

Further, in the present invention, the saddle has a structure in which the saddle is indirectly in contact with the frame via two points of the convex portion and the force distributing bracket, so that the saddle is different from a conventional bicycle in which the saddle is directly connected to the frame. In addition, vibration during running due to unevenness of the road surface is reduced.

In the present invention, the term "car" includes not only bicycles but also motorcycles other than bicycles, such as motorcycles and tricycles.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment in which a vehicle weight shifting device according to the present invention is applied to a bicycle will be described with reference to FIGS.
This will be described in detail based on FIG.

The bicycle 1 shown in FIG. 1 employs a diamond-shaped frame 2 which is widely known as a bicycle frame. This type of frame 2 generally has a structure as shown in FIG. , Head pipe 3 and standing pipe 4
With a horizontal upper pipe 5 and a lower slope lower pipe 6,
In addition, in this embodiment, a back fork 7 and the like are joined to the standing pipe 4. In this embodiment, a diamond is formed by using a square frame part 8 (see FIG. 2) having a U-shaped cross section instead of the upper pipe 5. It is assumed that the frame 2 has a shape. The rectangular frame part 8 has a groove 9 inside its U-shape.
Are arranged so as to face upward.

The diamond-shaped frame 2 having the above-described configuration is provided with a convex portion 10.
Are arranged on the rectangular frame part 8 upward as shown in FIG.
It is installed so that it can slide in the front and rear wheel direction. Note that the top of the projection 10 is provided so as to protrude upward from the groove 9 of the rectangular frame component 8.

A band-shaped handle 11 surrounding the outer periphery of the rectangular frame part 8 is attached to the convex part 10, and this handle 11 prevents the convex part 10 from falling off from the square frame part 8. In addition to functioning as a means for performing the operation, the projection 10 also has a function as a grip when the projection 10 is slid. That is, when it is desired to adjust the sliding position of the convex portion 10, the handle 11 may be grasped and moved in the front and rear wheel direction. The protrusion 10 can be slid until the handle 11 contacts the stopper 8a on the lower surface of the rectangular frame component 8.

As shown in FIG. 1, the rectangular frame component 8
An arm 12 having a U-shaped cross section (see FIG. 4) is disposed in parallel with the rectangular frame part 8, and the arm 12 has an inner bottom surface in contact with the top of the projection 10. And is swingably provided like a seesaw with the top of the projection 10 as a fulcrum.

One end 12a of the arm 12 is joined to a portion of the frame 2 that supports the front wheel, that is, to the head pipe 3 side, while the other end 12b of the arm 12 is provided with a saddle 14 with a seat pillar 13. It is attached detachably.

Although various types of joining structures between the arm 12 and the head pipe 3 are conceivable, in this embodiment, an engaging projection 15 is provided on the back surface of the head pipe 3 (FIG. 7).
An engaging recess 16 to be fitted to the engaging convex portion 15 is formed on one end side 12a of the arm (see FIG. 4), and a pin hole 15a of the engaging convex portion 15 and a pin hole of the engaging concave portion 16 are formed. A structure is adopted in which a common joint pin 22 is inserted into and joined to 16a.

In the present embodiment, a holding hole 18 with a split groove 17 (see FIG. 5) is provided on the other end 12b of the arm, and the body of the seat pillar 13 is provided in the holding hole 18. After the abdomen is inserted, the split groove 17 of the holding hole 18 is tightened with a screw 19 to fix the saddle 14 integrally with the seat pillar 13.

In this embodiment, the front end of the seat pillar 13 of the saddle 14 is inserted into the upright pipe 4 of the frame 2.
This is to prevent the lateral runout of No. 4 from occurring.

The arm 12 can be made of a rigid bar, but in this embodiment, from the viewpoint of enhancing the effect of absorbing vibration during traveling, the arm 12 is made of a bar-shaped spring material.

As shown in FIG. 1, a force-distributing bracket 20 is provided at the joint between the arm 12 and the head pipe 3. One end 12 a of the arm 12 connects the head pipe 3 to the arm 12. When lifting, it functions as a means for distributing the lifting force.

That is, in the case of this embodiment, the arm 12
Is swingable like a seesaw with the top of the projection 10 as a fulcrum as described above, so that when the driver's weight is applied to the saddle 14 at the other end 12b of the arm, the load causes the head to move to the one end 12a of the arm. A force in the direction of lifting the pipe 3 is generated in a reactive manner. By dispersing the lifting force, a means for preventing the front wheel from floating and reducing the load bearing ratio of the rear wheel is a force distribution bracket 20. As shown in FIG. 6, the force-distributing bracket 20 of the present embodiment has
00, a connecting portion 201, and an abutting portion 202.

The contact portion 200 of the force distribution metal fitting 20 is arranged on the front side of the head pipe 3 and is configured to contact the outer peripheral surface of the head pipe 3 from that position in surface contact. The connecting portion 201 of the force distribution bracket 20 is arranged on the back side of the head pipe 3 and is formed in a shape that sandwiches one end 12a of the arm 12 from both sides thereof. The connecting portion 201 is connected to one end side 12a of the arm 12, and the connection structure is such that the above-described joining pin 22 is inserted and fitted into the pin hole 201a of the connecting portion 201. Force distribution bracket 20
The abutting portion 202 is provided above the abutting portion 200 and is configured to abut a lower portion of the projection 21 on the front of the head pipe 3.

The force distribution fitting 20 having the above-described configuration
In the case of (1), when a force in the direction of lifting the head pipe 3 is generated on one end side 12a of the arm, the joining pin 22 tends to move upward by the lifting force. Butt 2 of fitting 20
02 and the projection 21 on the front face of the head pipe 3 are stopped. Therefore, the joining pin 22 does not move up at all, and the entire force distribution bracket 20 does not rotate around the joining pin 22. At this time, the force for moving the joining pin 22 upward, that is, the force in the direction for lifting the head pipe 3, is applied to the abutting portion 2 of the force distribution metal fitting 20.
The force in the direction in which the protrusion 21 on the front of the head pipe 3 is pushed up through the second portion 02 and the force in the horizontal direction pressing the outer peripheral surface of the head pipe 3 through the contact portion 200 of the metal fitting 20 are dispersed.

By the way, the joining pin 22 is connected to the force distributing metal fitting 2.
0 side pin hole 201a (see FIG. 6), arm end side 12
a of the pin hole 16a (see FIG. 4) and the head pipe 3
Although it is inserted through the pin hole 15a on the back side (see FIG. 7), the pin hole 201a on the force distribution fitting 20 side and the pin hole 16a on the one end side 12a of the arm have a margin between the joining pin 22 and the gap. Not provided. On the other hand, the pin hole 15a on the back side of the head pipe 3 is provided with a large diameter so as to always allow a clearance between the upper side of the pin hole 15a and the joining pin 22. With this configuration, the joining pin 22 does not come into contact with the upper portion of the pin hole 15a on the back surface of the head pipe 3 because the ascending movement of the joining pin 22 is prevented as described above.

Next, the operation of the bicycle according to the present embodiment configured as described above will be described with reference to FIG.

According to the bicycle 1 of the present embodiment shown in FIG. 1, the square frame part 8 of the frame 2 and the arm 12 with the saddle 14 are in contact with each other via the projection 10, so that
The weight of the driver on the saddle 14 mainly acts on the front wheel and the rear wheel through the contact point between the square frame component 8 and the projection 10. At this time, the closer the sliding position of the convex portion 10 is to the front wheel side, the more weight is applied to the front wheel, and the proportion of the weight applied to the rear wheel is reduced.

When the driver's weight is applied to the saddle 14 as described above, a force in a direction to lift the head pipe 3 is generated on the one end side 12a of the arm, but a part of this lifting force is generated. Are dispersed by the force distribution fitting 20 into a horizontal force pressing the outer peripheral surface of the head pipe 3. Therefore, according to the bicycle of the present embodiment,
Lifting of the front wheel due to the lifting force as described above is reduced,
The proportion of weight burden on the rear wheels is further reduced. For this reason, the dynamic frictional resistance between the rear wheel and the road surface is small, and the depressing force of the pedal required to rotationally drive the rear wheel is reduced, which is advantageous when speed is desired or when traveling uphill.

Since the protrusion 10 is provided so as to be slidable in the front and rear wheel directions, the weight ratio of the front and rear wheels can be freely adjusted by appropriately adjusting the slide position of the protrusion 10. .

According to the bicycle of this embodiment, the saddle 14
Since the arm 12 with the arm is indirectly in contact with the frame 2 through the two points of the projection 10 and the force distribution metal fitting 20, the arm 12 with the saddle is connected to the bicycle in which the saddle is directly connected to the frame as in the related art. Vibration during running due to unevenness is small, and the arm 12 to which the saddle 14 is attached is bent and elastically deformed like a beam to absorb the vibration, so that the vibration during running is further reduced.

Also, in the bicycle of the present embodiment, the length from the convex portion 10 to the saddle 14 can be changed by sliding the convex portion 10, and the spring force of the arm 12 can be changed by changing the length. Can be adjusted.

Although not shown, a bifurcated shape is used as a lateral vibration preventing member for preventing lateral movement of the arm 12 such that the arm 12 is sandwiched between the square frame parts 8 of the frame 2 from both sides. Stabilizers can be installed.

Further, the convex portion may be formed of an elastic member such as hard rubber. If such a configuration is adopted, the vibration is absorbed by the convex portion, so that the vibration during traveling can be further reduced.

In the above embodiment, a bicycle based on a diamond-shaped frame 2 has been described. However, the present invention can be applied to bicycles based on a frame such as a crossed seat stay, a funny bike, a staggered, and the like.
Further, the present invention can be applied to motorcycles other than bicycles, for example, motorcycles and tricycles.

[0037]

According to the present invention, as described above, an upwardly projecting portion is provided on the frame, and an arm with a saddle is swingably disposed with the top of the projected portion as a fulcrum, and one end of the arm is provided. Is joined to the head pipe side of the frame. For this reason, as the position of the convex portion is closer to the front wheel side, more weight is applied to the front wheel, and the proportion of the weight applied to the rear wheel is reduced. further,
Since the force distribution bracket disperses the force to lift the head pipe, the lifting of the front wheel due to the lifting force is reduced, and the proportion of weight burden on the rear wheel is further reduced, so that lighter bicycles etc. run It is suitable for enabling.

Further, according to the present invention, the arm with the saddle has a structure in which the arm is indirectly in contact with the frame via the projection and the force-distributing bracket, so that the saddle is directly connected to the frame as in the prior art. Compared to bicycles, there is less vibration during traveling due to unevenness of the road surface, there is also a vibration damping effect, and the riding comfort of bicycles and the like can be improved.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a bicycle to which a vehicle weight shifting device according to the present invention is applied.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is an explanatory view of a convex portion on the frame shown in FIG. 1;

FIG. 4 is an explanatory view of the arm shown in FIG. 1;

FIG. 5 is an explanatory view of a saddle attachment site at the other end of the arm shown in FIG. 1;

FIG. 6 is a perspective view of the force distribution fitting shown in FIG. 1;

7 (a) is an enlarged view of the vicinity of a head pipe of the frame shown in FIG. 1, and FIG. 7 (b) is a view taken in the direction of arrow B in FIG. 7 (a).

FIG. 8 is an explanatory view of a diamond-shaped frame.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Bicycle 2 Frame 3 Head pipe 4 Standing pipe 5 Upper pipe 6 Lower pipe 7 Back fork 8 Square frame part 8a Stopper 9 Square frame part groove 10 Convex part 11 Handle 12 Arm 12a One end side of arm 12b The other end of arm Side 13 Seat pillar 14 Saddle 15 Engagement convex part 15a Pin hole of engagement convex part (pin hole on back of head pipe) 16 Engagement concave part 16a Pin hole of engagement concave part (pin hole on one end side of arm) 17 Split groove 18 Holding hole 19 Screw 20 Force distribution metal fitting 21 Projection on front of head pipe 22 Joint pin 200 Contact part of force distribution metal fitting 201 Connecting part of force distribution metal fitting 201a Pin hole of connecting part 202 Butt of power distribution metal fitting

Claims (5)

[Claims] 1. A vehicle comprising: a protrusion provided upwardly on a frame of a bicycle or other vehicle; and an arm disposed so as to be swingable about a top of the protrusion, and one end of the arm is provided at one end of the frame. One of the arms is attached to the head pipe supporting the front wheel, and the other end of the arm is attached with a saddle. At the joint between the arm and the head pipe, one end of the arm attempts to lift the head pipe. A weight dispersing device for dispersing the lifting force when the vehicle is moved. 2. An abutting portion which is located on the front side of the head pipe and abuts on the outer peripheral surface of the head pipe from that position, an arm is located on the back side of the head pipe and an arm. 2. The vehicle weight shifting device according to claim 1, further comprising a connecting portion connected to one end of the vehicle via a connecting pin, and a contact portion that abuts a lower portion of the protrusion provided on the head pipe. . 3. The weight shifting device for a bicycle or the like according to claim 1, wherein the protrusion is provided so as to be slidable in the front and rear wheel directions. 4. The apparatus according to claim 1, wherein the arm is made of a spring material. 5. The vehicle weight moving device according to claim 1, wherein the frame is provided with a lateral vibration preventing member for preventing the lateral vibration of the arm.