JP6172777B2 - Auxiliary wheel device - Google Patents

Description

  The present invention is an auxiliary wheel device mounted on the rear wheel portion of a bicycle, which allows the auxiliary wheel to move up and down, has a spring property, and can adjust its upward movement amount. A bicycle that makes it easy to determine when it is possible to run independently, and for the elderly and infant three-seater drivers who have suffered a decline in physical abilities. The present invention relates to an auxiliary wheel device that realizes a safe and secure bicycle.

Conventionally, for infants who cannot run independently, auxiliary wheels are installed on the rear wheels to prevent them from falling and are widely sold and used.
However, the auxiliary wheel of a general infant car hardly moves up and down, and the auxiliary wheel picks up the unevenness of the road surface sensitively, the riding comfort is poor, and as the vehicle approaches a time when it can stand on its own, it needs to run at an incline. However, there is a problem that the auxiliary wheel hinders the inclination traveling necessary for the self-supporting traveling and it is difficult to determine the removal time of the auxiliary wheel.
In addition, the elderly and the three-seater rider who have begun to feel a decline in physical abilities will not impair the lightness of a normal two-wheeled vehicle, and will be a safe auxiliary device that assists in an irregular driving situation. Seeking.

In the following document 1, a part of the supporting arm connecting the bicycle and the auxiliary wheel is overlapped with the supporting wheel on the lower side and the supporting arm on the auxiliary wheel on the upper side. An auxiliary wheel support arm with a tilting function is shown in which the bicycle support arm and the auxiliary wheel side support arm of the overlapping parts are axially attached to each other so as to be movable in the direction and bound with a T-shaped binding rod and an elastic material.

However, with the auxiliary wheel support arm with a tilt function shown in the following document 1, it is difficult to ensure a sufficient amount of upward movement of the auxiliary wheel while having sufficient strength and durability. It is extremely difficult to determine when to remove.

Further, in the following document 2, there is an auxiliary wheel adjusting structure, a vertical frame whose upper end is pivotally connected to the bicycle, one end of which is movable pivotally connected to the bottom end of the vertical frame, and the other end is an auxiliary wheel. The control unit includes a control unit, a rigidity adjustment unit, and a plurality of connecting rods. The control unit is installed between the first pivoting arm pivoted, the vertical support plate, and the first pivoting arm. By adjusting the rigidity adjusting unit or the connecting rod according to the above, providing the movable margin of the vertical base plate and the first pivot arm, it can be adjusted step by step, and the auxiliary An auxiliary wheel adjustment structure is shown which can reduce the dependence on wheels.

However, the auxiliary wheel adjustment structure shown in Document 2 is composed of a vertical support plate, a first pivot arm, a control unit, a rigidity adjustment unit, and a plurality of connecting rods. It is complex and difficult to incorporate into an already sold or purchased vehicle.
In addition, it is extremely difficult for the user to reduce the dependence on the auxiliary wheel by adjusting in stages using the control unit or the like.

On the other hand, in the following document 3 according to the applicant's invention, a trailing arm provided with a strut having a spring characteristic is provided in the rear wheel part of the bicycle, an auxiliary wheel is attached to the rear end part, and the spring characteristic is multistage. An auxiliary wheel device suitable for a non-linear elderly person or an infant three-seater driver is shown.

However, the auxiliary wheel device shown in the following document 3 has an excellent function capable of realizing a safe and secure bicycle, but it is necessary to provide a trailing arm and its accessory parts, It is necessary and there are restrictions on installing it on existing or purchased vehicles.

Japanese Patent No. 3300395 Utility Model Registration No. 3135152 Japanese Patent No. 5246628

Infant cars can be easily attached and detached without changing the structure of a conventional bicycle, and the auxiliary wheels have a springiness in the vertical direction and a considerable amount of upward movement without compromising strength and durability. It is easy to adjust the amount of upward movement, and it does not interfere with the tilting required for bicycle independent running, so that it can smoothly acquire independent running skills, and it is easy to determine when it is possible to run independently. Thus, it is to provide an auxiliary wheel device that can shorten the acquisition period of self-sustained driving skills and is effective in improving riding comfort and reducing noise.
In addition, for elderly cars and three-seater passenger cars, it can be easily detached without changing the structure of a conventional bicycle, and without losing strength and durability, High for all requirements on the driver's side, such as degree, weight difference, presence / absence of infant riding, and on the road side, such as straight smooth roads, steps / concave roads, narrow roads, small R turns, etc. The object is to provide an auxiliary wheel device that can be harmonized by level and can be easily adopted in already-sold and already purchased vehicles.

The first invention for achieving the above object has one L-shaped support rod, an auxiliary wheel is rotatably mounted on the horizontal tip of the L-shaped support rod, and a bicycle rear wheel body. Auxiliary wheel device fixed to
Storing the vertical upper half of the L-shaped support rod, and having an outer cylinder fixed to the vehicle body via a substrate ;
The outer shape of the vertical upper half of the L-shaped support bar and the inner surface of the outer cylinder make a pair, and the L-shaped support bar cannot rotate about the vertical axis of the L-shaped support bar, The L-shaped support rod is slidably fitted in the direction, and a spring body is attached to the vertical upper end portion or the vertical lower half portion of the L-shaped support rod to give the auxiliary wheel an upward movement amount and give a supporting force. This is an auxiliary wheel device.

A second invention for achieving the above object has two L-shaped support rods, and an auxiliary wheel is rotatably attached to one horizontal tip of each of the two L-shaped support rods. An auxiliary wheel device fixed to the rear wheel body,
Inside the auxiliary wheel, the other horizontal portion of the two L-shaped support rods is rigidly connected to one horizontal portion of the two L-shaped support rods, and the two L-shaped support rods It has an outer cylinder that houses the vertical upper half and is fixed to the car body.
The two L-shaped support rods are non-rotatable around one vertical axis of the two L-shaped support rods and are slidably fitted in the vertical direction, and the two L-shaped support rods spring body is mounted on one or vertically upper end or vertical lower half of both bars, an auxiliary wheel unit, characterized in that which gave support force of the multiple stages the auxiliary wheel.

A third invention for achieving the above object is the first invention,
A vertical upper half portion of the one L-shaped support rod has a cylindrical shape, and another vertical column is rigidly connected in parallel to the vertical upper half portion of the L-shaped support rod. The vertical upper half of the L-shaped support rod to which one of the cylinders is rigidly connected is stored,
The L-shaped support rod is not rotatable about the vertical axis of the L-shaped support rod and is slidably fitted in the vertical direction, and is attached to the vertical upper end portion or the vertical lower half portion of the L-shaped support rod. Is fitted with a spring body,
Further, the auxiliary wheel device is characterized in that the upward movement amount of the support rod can be adjusted, and the upward movement amount of the auxiliary wheel can be adjusted.

A fourth invention for achieving the above object is the auxiliary wheel device according to the second invention, wherein an upward movement amount of the auxiliary wheel can be adjusted.

A fifth invention for achieving the above object is the second or fourth invention,
A manual stand that locks the upward movement of the auxiliary wheel from the upright state of the bicycle and can lock the maximum upward movement amount of the auxiliary wheel or locks only the upward movement of the bicycle from the upright state is added. This is an auxiliary wheel device.

A sixth invention for achieving the above object is the fifth invention ,
A stand that is pivotable about a support shaft that extends horizontally and horizontally from the rear wheel body of the bicycle above the L-shaped support rod, and extends downward from the support shaft in the vertical axis direction of the L-shaped support rod. A plate, a stand plate coupled to a rear end, two left and right operation levers disposed on a side surface of the rear wheel of the bicycle and outside a contour line of the rear wheel, and a front end portion of the two operation levers. It consists of connecting parts that connect to each other,
When the operation lever is operated in the first direction, the maximum upward movement amount of the L-shaped support rod is locked, and when the operation lever is operated in the direction opposite to the first direction, the bicycle is in an upright state. A manual stand for controlling the upward movement of the L-shaped support rod is added so as to lock the upward movement of the auxiliary wheel from the auxiliary wheel device.

A first aspect of the present invention is an auxiliary wheel device that has one L-shaped support bar, an auxiliary wheel is rotatably attached to the horizontal tip of the L-shaped support bar, and is fixed to a bicycle rear wheel body. Because
Storing the vertical upper half of the L-shaped support rod, and having an outer cylinder fixed to the vehicle body via a substrate ;
The outer shape of the vertical upper half of the L-shaped support bar and the inner surface of the outer cylinder make a pair, and the L-shaped support bar cannot rotate about the vertical axis of the L-shaped support bar, The L-shaped support rod is slidably fitted in the direction, and a spring body is mounted on the vertical upper end portion or the vertical lower half portion of the L-shaped support rod to give the auxiliary wheel an amount of upward movement and support force. Because it is an auxiliary wheel device characterized by
Auxiliary wheels do not pick up small bumps on the road sensitively, which is effective in improving riding comfort and reducing noise, and the auxiliary wheels that accompany the acquisition of self-sustained driving skills impede the incline required for independent driving. This has the effect that the self-driving skill can be acquired smoothly and the acquisition period of the self-supporting skill can be shortened.

The second invention has two L-shaped support rods, and an auxiliary wheel is rotatably attached to the horizontal tip of one L-shaped support rod of the two L-shaped support rods. An auxiliary wheel device fixed to the wheel body,
On the inner side of the auxiliary wheel, the other horizontal portion of the two L-shaped support rods is rigidly connected to the horizontal portion of one L-shaped support rod holding rod of the two L-shaped support rods,
Storing the vertical upper half of the two L-shaped support rods, and having an outer cylinder fixed to the vehicle body;
The two L-shaped support rods are non-rotatable around one vertical axis of the two L-shaped support rods and are slidably fitted in the vertical direction, and the two L-shaped support rods spring body is mounted on one or vertically upper end or vertical lower half of both rods, it since an auxiliary wheel device, characterized in that to have a supporting force of the multi-stage to the auxiliary wheel,
Since multiple springs can be installed, it is easy to select the spring constant and to make the deflection-load characteristic diagram multi-stage linear, withstand heavy loads, and highly harmonize the requirements on the driver side with those on the road side. There is an effect that a safe and secure bicycle can be easily realized.
When only the first spring is attached, it is effective for an infant bicycle.

According to a third invention, in the first invention, the vertical upper half of the one L-shaped support bar has a cylindrical shape, and another vertical cylinder is parallel to the vertical upper half of the L-shaped support bar. A vertical upper half portion of an L-shaped support rod to which the other one cylinder is rigidly connected is stored in the outer cylinder;
The L-shaped support rod is not rotatable about the vertical axis of the L-shaped support rod and is slidably fitted in the vertical direction, and is attached to the vertical upper end portion or the vertical lower half portion of the L-shaped support rod. Is fitted with a spring body,
Moreover, the adjustment of the upward movement of the support rod to enable it from an auxiliary wheel device, characterized in that to allow adjustment of the upward movement of the auxiliary wheel,
The effect of the first invention is enhanced, and it is easy to prevent rotation of the L-shaped support rod around the vertical axis, and there is an effect that the auxiliary wheel device for infants can be realized in a small size and at low cost.

According to a fourth invention, in the second invention,
Since the auxiliary wheel device is characterized in that the amount of upward movement of the auxiliary wheel can be adjusted, in addition to the effect of the second invention, the degree of decrease in the physical ability of the driver, the degree of driving skill, and the lightness of the bicycle -There is an effect that the amount of vertical movement of the auxiliary wheel can be adjusted according to the stability preference.
Note that when only one spring is incorporated, it is suitable for an infant, and when two springs are incorporated, it is suitable for an elderly person or an infant riding three-seater driver. Infants are not required in a short period of time, and for example, if used multiple times as a rental, the cost can be reduced.

According to a fifth invention, in the second or fourth invention ,
Manual type capable of locking upward movement of the auxiliary wheel from the upright state of the bicycle and locking the maximum upward movement amount of the auxiliary wheel or locking only upward movement of the auxiliary wheel from the upright state of the bicycle Because it is an auxiliary wheel device characterized by adding a stand,
In addition to the effects of the second or fourth invention , by locking the upward movement of the auxiliary wheel from the upright state of the bicycle, the conventional large-sized foot-operated stand can be eliminated and the maximum upward of the auxiliary wheel can be eliminated. When the movement amount is locked, it is possible to prevent the spring stress from being excessive and to increase the degree of freedom in selecting the spring constant of the spring by an extremely simple operation.

According to a sixth invention , in the fifth invention ,
A stand that is pivotable about a support shaft that extends horizontally and horizontally from the rear wheel body of the bicycle above the L-shaped support rod, and extends downward from the support shaft in the vertical axis direction of the L-shaped support rod. A plate, a stand plate coupled to a rear end, two left and right operation levers disposed on a side surface of the rear wheel of the bicycle and outside a contour line of the rear wheel, and a front end portion of the two operation levers. It consists of connecting parts that connect to each other,
When the operating lever is operated in the first direction, the maximum upward movement amount of the L-shaped support rod is restricted, and when the operating lever is operated in the direction opposite to the first direction, the bicycle is in an upright state. From the auxiliary wheel device, characterized in that a manual stand for controlling the upward movement of the L-shaped support rod is added to lock the upward movement of the auxiliary wheel from
In addition to the effect of the fifth invention , there is an effect that a manual stand that can be reliably and easily operated can be realized at a low cost with a simple component structure.

It is the perspective view which mounted | wore the bicycle with the auxiliary wheel apparatus which concerns on 1st Embodiment of this invention. It is the perspective view which mounted | wore the bicycle with the auxiliary wheel apparatus which concerns on the 2nd Embodiment of this invention. 1 is a front view of an auxiliary wheel device assembly according to a first embodiment of the present invention. It is AA sectional drawing of FIG. It is a top view of the auxiliary wheel apparatus assembly which concerns on the 1st Embodiment of this invention. It is a front view of the auxiliary wheel apparatus assembly which concerns on the 2nd Embodiment of this invention. It is AA sectional drawing of FIG. It is a top view of the auxiliary wheel apparatus assembly which concerns on the 2nd Embodiment of this invention. AA sectional drawing of FIG. It is a front view of the auxiliary wheel apparatus assembly which concerns on the 3rd Embodiment of this invention. It is a top view of the principal part of the manual stand of the auxiliary wheel apparatus which concerns on the 2nd Embodiment of this invention. It is a top view of the fixed base part which concerns on the manual type stand of FIG. It is a front view of the stand plate which concerns on the manual stand of FIG. It is a deflection-load characteristic diagram of a spring concerning a 2nd embodiment of the present invention.

Embodiments of the present invention will be described below with reference to the drawings. However, the drawing omits or simplifies known portions, portions that are not directly related to the gist of the invention, and portions that are warped when described.

FIG. 1 is a perspective view of an auxiliary wheel device according to a first embodiment of the present invention mounted on a bicycle.
In FIG. 1, 1-1 is an auxiliary wheel device assembly, a pair of left and right auxiliary wheel device assemblies 1-1 are fixed to the rear axle 83-1 of the bicycle, and the auxiliary wheels 70-1 are parallel to the rear wheels. One pair is arranged.

3 is a front view of the auxiliary wheel device assembly, FIG. 4 is a cross-sectional view taken along the line AA of FIG. 3, and FIG. 5 is a plan view of the auxiliary wheel device assembly.
3 to 5, reference numeral 10-1 denotes an L-shaped support rod, and a sub-support rod 102 having a circular cross-section and a straight line is provided on the vertical upper half of the L-shaped main support rod 101 having a circular cross-section. The axis abuts so as to be parallel to the vertical axis of the L-shaped main support rod 101, the corresponding contact portion is welded, and the auxiliary wheel 70-1 is located inside the horizontal tip of the L-shaped main support rod 101. The outer washer 71 and the split pin 72 are used for rotation.

Reference numeral 20-1 denotes a substrate of the auxiliary wheel device assembly 1-1, which is a base member for incorporating the components of the auxiliary wheel device assembly 1-1 and attaching the auxiliary wheel device assembly to the bicycle.
Reference numeral 40-1 denotes an outer cylinder that houses the upper half of the L-shaped support bar 10-1, and 30-1 denotes a cover that attaches the outer cylinder 40-1 to the substrate 20-1. The vertical upper half portion of the L-shaped support rod 10-1 is housed in the outer cylinder 40-1, and is fitted around the vertical axis so as not to be rotatable and smoothly slidable in the vertical direction. The cover 30-1 is assembled to the base plate 20-1 using bolts and nut washers to form an auxiliary wheel device assembly 1-1. Reference numerals 31 to 33, 34 to 36, and 37 to 39 are a set of bolts, nuts, and washers.

Reference numeral 21 denotes a positioning plate for assembling the auxiliary wheel device assembly 1-1 to the bicycle, which is a bent steel plate. The substrate 20-1 is formed by one of the set of the plurality of bolts, nuts, and washers. Fixed to. A small screw 22 is added to ensure the positional accuracy when the positioning plate 21 is attached to the substrate 20-1.

Reference numeral 83-1 denotes an axle, and reference numeral 85 denotes a nut for fixing the auxiliary wheel assembly 1-1 to the chain stay 82-1, which is shared with the fixing of the axle 83-1. When the auxiliary wheel assembly 1-1 is assembled to the bicycle, the hexagonal piece of the bolt 31 and the upper side of the rear fork 81-1 are brought into contact with each other, and the upper piece of the positioning plate 21 and the chain stay 82-1 are placed below. The nut 85 is tightened by bringing the piece into contact. One set of bolts and nuts 37 to 39 also serves to fix the lower end of the fender stay 86-1.

Reference numeral 41-1 denotes an upper plate welded and fixed to the upper end of the outer cylinder 40-1. The upper plate 41-1 is provided with a through-hole of the sub-support rod 102, and the central axis of the L-shaped main support rod 101 is provided. A female screw 17 is provided in a portion corresponding to the upper side, and an adjustment bolt 50-1 is meshed with the female screw 17, and the adjustment bolt 50-1 is manually rotated to be above the L-shaped support rod 10-1. The amount of movement can be adjusted continuously. Reference numeral 51 denotes a lock nut of the adjusting bolt 50-1.

A spring 60-1 is coaxially attached to the vertical lower half of the L-shaped main support bar 101, and the upper end of the spring 60-1 abuts against the lower end of the outer cylinder 40-1 via a washer 61-1. Is supported by the split pin 63-1 attached to the L-shaped support rod 10-1, is in contact with the washer 62-1 and applies a downward support force to the auxiliary wheel 70-1. The upper end portion of the auxiliary support rod 102 is provided with a split pin 14 through the upper plate 41-1 to prevent the L-shaped support rod 10-1 from being separated from the outer cylinder 40-1 and falling off, and the rear wheel of the bicycle. The suspension of the auxiliary wheel 70-1 when the part is lifted is restricted.
The supporting force of the auxiliary wheel 70-1 can be adjusted by changing the vertical position of the split pin 63-1 as well as changing the specification of the spring 60-1.
Further, the spring 60-1 may have a small diameter and may be attached coaxially with the adjusting bolt 50-1 within the outer cylinder 40-1.

In the upright state of the bicycle, the adjustment bolt 50-1 is rotated and sunk downward, the lower end thereof is lightly brought into contact with the upper end of the L-shaped main support rod 101, and the auxiliary wheel 70-1 is spaced from the ground by about 5 to 10 mm. Set so that is secured. When practicing self-sustained driving for the first time, start from this position, and as you practice, rotate the adjustment bolt 50-1 to raise it, allowing the bicycle to run at a slant, and acquire a self-supporting skill smoothly. In addition, it is possible to shorten the acquisition period of the independent running skill without bothering the parents.

The connection between the main support bar 101 and the sub-support bar 102 is changed to welding, and a female screw is provided in one of the support bars 101 and 102 and a hole is newly provided in the other support bar. If bolts are used, the main support bar 101 and the sub support bar 102 can be divided into separate parts.

FIG. 2 is a perspective view of the auxiliary wheel device according to the second embodiment mounted on a bicycle.
In FIG. 2, 1-2 is an auxiliary wheel device assembly, a pair of left and right auxiliary wheel device assemblies are fixed to the rear axle 83-2 of the bicycle, and a pair of auxiliary wheels 70-2 are arranged in parallel with the rear wheels. A manual stand 90 is assembled to the upper part of the auxiliary wheel device assembly 1-2.

6 is a front view of the auxiliary wheel device assembly, FIG. 7 is a sectional view taken along line AA in FIG. 6, FIG. 8 is a plan view of the auxiliary wheel device assembly, and FIG. 9 is a sectional view taken along line AA in FIG. .
6 to 9, reference numerals 10-2 and 10-3 denote first and second L-shaped support rods whose cross-sectional shapes are arranged before and after the circle, and the horizontal front ends of the L-shaped support rods 10-2 arranged rearward. The auxiliary wheel 70-2 is rotatably mounted using the snap ring 65, and the horizontal portion of the L-shaped support rod 10-3 arranged in the front is connected to the horizontal portion of the L-shaped support rod 10-2 arranged in the rear. The connection plate 11-1 and the connection plate 11-2 are welded from above and below to a triangular portion that is coupled and formed between both support rods in plan view.
The vertical upper half of the L-shaped support bar 10-2 is accommodated in the outer cylinder 40-2, and the vertical upper half of the L-shaped support bar 10-3 is accommodated in the outer cylinder 40-3. The auxiliary wheel device assembly 1-2 is sandwiched between the board 20-2 and the cover 30-2 by using the bolt 34, the nut 35, and the washer 36, and the axle 83-2. The nut 85 is tightened and fixed. 84 is a washer.
Further, as shown in FIG. 7, the auxiliary wheel assembly 1-2 uses a U-shaped fixing plate 23 with a weld nut, a washer 24, and a bolt 25 in front of the second L-shaped support bar 10-3. It is fixed to the chain stay 82-2.
43 is a seal rubber that prevents leakage of grease in the bush 42 and the outer cylinders 40-2 and 40-3, and prevents water and dust from entering from the outside.

A spring 60-2 is attached to the vertical lower half of the first L-shaped support bar 10-2, and its upper end abuts against the lower end of the outer cylinder 40-2 via a washer 61-2 and a cap 44. The lower end of the 1 spring 60-2 is in contact with a washer 62-3 supported by a split pin 63-2 provided on the first L-shaped support rod 10-2.
The cap 44 is a molded product of reinforced plastic or steel plate and is lightly press-fitted into the outer cylinders 40-2 and 40-3.
A second spring 60-3 is attached to the vertical lower half of the second L-shaped support rod 10-3, and a predetermined gap is provided at the upper end of the second spring 60-3. And the lower end of the second spring 60-3 contacts the washer 62-3 supported by the split pin 63-3 provided on the second L-shaped support rod 10-3. It touches.
Due to the action of the first and second springs 60-2 and 60-3, a downward spring force is applied to the vertical movement of the auxiliary wheel as described later.

Reference numeral 41-2 denotes an upper plate fixed to the upper end of the outer cylinder 40-3 by welding. The upper plate 41-2 is provided with a female screw 17, and an adjusting bolt 50-2 is engaged with the female screw 17. . 51 is a lock nut of the adjusting bolt 50-2.

When the adjusting bolt 50-1 is rotated and submerged, the lower end of the adjusting bolt 50-1 comes into contact with the upper end of the second L-shaped support bar 10-3, and the maximum upward movement amount of the second L-shaped support bar 10-3, that is, the auxiliary wheel 70-2. It is possible to adjust the maximum upward movement amount.
In the second embodiment, if the second spring 60-3 is removed and only the first spring is used, the same effect as that of the first embodiment with one spring can be obtained.

FIG. 10 is a front view of an auxiliary wheel device according to the third embodiment of the present invention.
The third embodiment is basically the same as the second embodiment except that the vertical upper ends of the first L-shaped support bar 10-4 and the second L-shaped support bar 10-5 are fastened to each other by the connection plate 12. Only the parts that are the same as those of the second embodiment will be described.
In FIG. 10, the internal thread 17 is shape | molded by the vertical upper end part of the 1st L-shaped support bar 10-4 and the 2nd L-shaped support bar 10-5. 12 is a strip-shaped steel plate connecting the vertical upper ends of the first L-shaped support rod 10-4 and the second L-shaped support rod 10-5, and the first L-shaped support rod 10-4 and the first L-shaped support rod 10-5. A bolt hole is provided at a position corresponding to the female screw 17 provided in the first L-shaped support bar 10-4 and the second L-shaped support bar 10-5, and a predetermined distance dimension is defined between the first L-shaped support bar 10-4 and the second L-shaped support bar 10-5. It is attached using screws 17, bolts 13, and washers 16.
As a result, in the present embodiment, in addition to the fastening of the lower horizontal portion of the first L-shaped support rod 10-4 and the second L-shaped support rod 10-5, the vertical upper end portion is also fastened. In addition, it is easy to ensure accuracy.

FIG. 14 is a deflection-load characteristic diagram of the spring according to the second embodiment of the present invention.
In FIG. 14, the vertical axis indicates the load of the spring, that is, the supporting force of the auxiliary wheel, and the horizontal axis indicates the amount of deflection of the spring, that is, the vertical movement amount of the auxiliary wheel.
Line A is a characteristic line of gentle inclination determined by the first spring 60-2, and line B is a characteristic line of steep inclination determined by the operation of both the first spring 60-2 and the second spring 62-3.
Point a is an intersection of the line A and the horizontal axis, and is a point where the deflection of the first spring 60-2 is zero. Point b indicates that the bicycle is upright by the auxiliary wheel 70-2.

Point c is a point at which the upper end surface of the second spring 60-3 and the lower surface of the cap 44 come into contact with each other and the second spring starts to operate. When the upper end surface of the second L-shaped support rod 10-3 and the lower end surface of the adjusting bolt 50-2 come into contact with each other, the deflection-load characteristic line rises vertically. Point d is a point where the upper end surface of the second L-shaped support rod 10-3 is in contact with the lower surface of the upper plate 41-2 in a state where the adjustment bolt 50-2 is pulled up to the maximum, and the line T is the rise at that time. Is a line.

L1 is the maximum amount of deflection of the first spring 60-2, L2 is the maximum amount of deflection of the second spring 60-3, and L3 is the amount of deflection of the first spring 60-2 when the bicycle is upright.
Wr is the load of the spring when the bicycle is upright, and is the supporting force of the auxiliary wheel 70-2. θ1 is the slope of line A, and θ2 is the slope of line B, indicating the respective spring constants.
The load Wr is related to the independence at the time of parking by the auxiliary wheel 70-2. L4 is a clearance from when the bicycle is upright to when the second spring 60-3 starts operating, and is also shown in FIG.

Adjust the spring constants θ1 and θ2 of the first and second springs 60-2 and 60-3, the deflection amount L3 of the first spring 60-2 when the bicycle is upright, the operation start point c of the second spring, etc. By doing so, the supporting force of the auxiliary wheel can be adjusted, and the lightness and stability of the bicycle can be adjusted.
The deflection-load characteristic diagram of the spring is the same in the third embodiment, and can be applied to the first embodiment as long as it is limited to a portion having one spring.

FIG. 11 is a plan view of the main part of the manual stand of the auxiliary wheel device according to the second embodiment of the present invention, and shows a view on arrow Y in FIG. FIG. 12 is a plan view of the fixed base assembly of the manual stand, and FIG. 13 is a front view of the stand plate according to the manual stand, and also shows the operation of the stand plate.
In FIG. 11, 91 is an operation lever made of a pair of steel pipes arranged on the left and right sides of the bicycle, and the front and rear ends thereof are in pressure contact with each other. Reference numeral 92 denotes a steel pipe connecting bar for fastening the left and right operation levers 91, and is welded to the operation lever 91 through a hole provided in a pressure contact portion at the front end of the operation lever 91. The left and right ends of the connecting bar 92 also serve as operation grips.
A stand plate 93 made of an inverted L-shaped thick steel plate is welded to the rear end of the operation lever 91. The left and right positions in plan view of the stand plate 93 welded to the operation lever 91 are substantially the same as the left and right positions of the L-shaped support rod 10-2.

In FIG. 12, reference numeral 94 denotes a fixed base, which has a T-shape in a plan view having one support shaft 94-1, and the support shaft 94-1 is in the horizontal direction of the bicycle to which the auxiliary wheel device is attached. The fixed plate 95, the bolt 96-1, and the washer 96-3 are used to fix the carrier stay 82-2.
The support shaft 94-1 is inserted through a round hole provided in the stand plate 93, and the stand plate 93 is rotatable by using a nut 96-2 and washers 96-4 and 96-5 on the support shaft 94-1. Installed on.

In FIG. 13, the stand plate 93 is provided with a convex portion R at the lower end portion of the inverted L shape and a convex portion Q at the upper step portion.
The operating lever 91 rotates around the support shaft 94-1 in the range of the rotation angle Z by operating the grip portions at the left and right ends of the connecting bar 92 in the vertical direction.
The broken line indicates the time when the operation grip portion is moved upward and the connecting bar 92 is held by the clamp 97 shown in FIG. 2, and the protrusion R at the lower end of the stand plate 93 and the bicycle are in an upright state. The upper end of the support rod 10-2 is in contact with the auxiliary wheel 70-2 so that the upward movement of the auxiliary wheel 70-2 is locked and the stand functions.
A solid line indicates a state in which the operation grip portion is moved downward and the connecting bar 92 is held by the clamp 98 shown in FIG. 2, and the upper projection Q of the stand plate 93 and the support rod 10-2 moved upward. The upper end abuts and the upward movement of the auxiliary wheel 70-2 is locked, and beyond this, the auxiliary wheel 70-2 does not move upward.
Since the first and second springs 60-2 and 60-3 do not bend any more, the stress of the spring is maximized at this position, and the spring sag and breakage can be controlled.
In the third embodiment, a manual stand similar to that in the second embodiment can be used. In this case, the collar 64 is abolished after changing the spring 60-3 used in FIG. 10 to the spring 60-2.
The clamps 97 and 98 are the same as those shown in FIG.

1-1, 1-2, 1-3 ... auxiliary wheel assembly 10-1 ... L-shaped support rod 101 ... main support rod 102 ... sub-support rod 10-2, 10-4 ... 1st L-shaped support bar 10-3, 10-5 ... 2nd L-shaped support bar 11-1, 11-2 ... Connection plate (bottom)
12 ... Connection plate (top)
DESCRIPTION OF SYMBOLS 13 ... Bolt 14 ... Split pin 15, 16 ... Washer 17 ... Female screw 20-1, 20-2, 20-3 ... Substrate 21 ... Positioning plate 22 ... Bolt 23 ... Fixing plate 24 ... Washer 25 ... Bolt 30-1, 30-2, 30-3 ... Cover
31, 34, 37 ... Bolts 32, 35, 38 ... Nuts
33, 36, 39 ... Washers 40-1, 40-2, 40-3, 40-4, 40-5 ... Outer cylinders 41-1, 41-2 ... Upper plate 42 ... Bush 43 ... Seal rubber 44 ... Cap 50-1, 50-2 ... Adjustment bolt 51 ... Lock nut 60-1 ... Spring 60-2, 60-4 ... First spring 60 -3, 60-5: second springs 61-1, 61-2, 61-3 ... washers 62-1, 62-2 ... washers 63-1, 63-2, 63-3, 63-4 ... Split pin 64 ... Collar 65 ... Snap ring 70-1, 70-2 ... Auxiliary wheel 71 ... Washer 72 ... Split pin 81-1, 81-2 ..Rear forks 82-1, 82-2, 82-3 ... Stay 83-1, 83-2, 83-3 ... axle 84 ... washer 85 ... nut 86-1, 86-2 ... fender stay 87 ... carrier stay 90 ... manual type Stand 91 ... Operating lever 92 ... Connecting bar 92-1 ... Grip part 93 ... Stand plate 94 ... Fixed base 94-1 ... Support shaft 96-1, 96-2 ...・ Bolt 96-3, 96-4, 96-5 ... Washer 97 ... Clamp (top)
98 ... Clamp (bottom)

Claims (6)

An auxiliary wheel device having one L-shaped support rod, wherein an auxiliary wheel is rotatably attached to a horizontal tip of the L-shaped support rod, and is fixed to a rear wheel body of a bicycle,
Storing the vertical upper half of the L-shaped support rod, and having an outer cylinder fixed to the vehicle body via a substrate ;
The outer shape of the vertical upper half of the L-shaped support bar and the inner surface of the outer cylinder make a pair, and the L-shaped support bar cannot rotate about the vertical axis of the L-shaped support bar, The L-shaped support rod is slidably fitted in the direction, and a spring body is attached to the vertical upper end portion or the vertical lower half portion of the L-shaped support rod to give the auxiliary wheel an upward movement amount and give a supporting force. An auxiliary wheel device characterized by that . An auxiliary wheel device having two L-shaped support rods, wherein an auxiliary wheel is rotatably attached to one horizontal tip of the two L-shaped support rods, and is fixed to a rear wheel body of a bicycle. There,
Inside the auxiliary wheel, the other horizontal portion of the two L-shaped support rods is rigidly connected to one horizontal portion of the two L-shaped support rods, and is perpendicular to the two L-shaped support rods. It has an outer cylinder that houses the upper half and is fixed to the car body.
The two L-shaped support rods are non-rotatable around one vertical axis of the two L-shaped support rods and are slidably fitted in the vertical direction, and the two L-shaped support rods spring body is mounted on one or vertically upper end or vertical lower half of both rods, auxiliary wheel device being characterized in that to have a supporting force of the multi-stage to the auxiliary wheel. A vertical upper half portion of the one L-shaped support rod has a cylindrical shape, and another vertical column is rigidly connected in parallel to the vertical upper half portion of the L-shaped support rod. The vertical upper half of the L-shaped support rod to which one of the cylinders is rigidly connected is stored,
The L-shaped support rod is not rotatable about the vertical axis of the L-shaped support rod and is slidably fitted in the vertical direction, and is attached to the vertical upper end portion or the vertical lower half portion of the L-shaped support rod. Is fitted with a spring body,
Moreover, the adjustment of the upward movement of the support rod to enable the auxiliary wheel apparatus according to claim 1, characterized in that made it possible to adjust the upward movement of the auxiliary wheel. The auxiliary wheel device according to claim 2, wherein an upward movement amount of the auxiliary wheel can be adjusted. A manual stand that locks the upward movement of the auxiliary wheel from the upright state of the bicycle and can lock the maximum upward movement amount of the auxiliary wheel or locks only the upward movement of the bicycle from the upright state is added. The auxiliary wheel device according to claim 2 or 4, wherein the auxiliary wheel device is characterized. A stand that is pivotable about a support shaft that extends horizontally and horizontally from the rear wheel body of the bicycle above the L-shaped support rod, and extends downward from the support shaft in the vertical axis direction of the L-shaped support rod. A plate, a stand plate coupled to a rear end, two left and right operation levers disposed on a side surface of the rear wheel of the bicycle and outside a contour line of the rear wheel, and front end portions of the two operation levers Are connected to each other,
When the operating lever is operated in the first direction, the maximum upward movement amount of the L-shaped support rod is restricted, and when the operating lever is operated in the direction opposite to the first direction, the bicycle is in an upright state. 6. The auxiliary wheel device according to claim 5, further comprising a manual stand for controlling the upward movement of the L-shaped support rod so as to lock the upward movement of the auxiliary wheel from the front.