JP3503897B1 - Auxiliary wheel for folding bicycle and folding bicycle with the auxiliary wheel - Google Patents

Abstract

[PROBLEMS] To be folded without using tools or the like,
Provided are a folding bicycle auxiliary wheel and a folding bicycle with an auxiliary wheel, which are excellent in running safety. SOLUTION: A fitting hole 3a for fitting a fixing means 4 therein.
, An auxiliary wheel stay 3 having auxiliary wheels, an insertion hole 6 for inserting the fitting portion 4-I of the fixing means 4, and one end of the auxiliary wheel stay 3 in which the fitting hole 3a is formed. And an auxiliary wheel stay receiving fitting 2 having an opening 5 for inserting the auxiliary wheel, and an auxiliary wheel stay receiving fitting 2 and the auxiliary wheel by fitting a fitting portion 4-I into a fitting hole 6 of the auxiliary wheel stay 3. Stay 3
The auxiliary wheel stay 3 is configured to fix the auxiliary wheel stay 3 to the auxiliary wheel stay with the fitting portion 4-I abutting on one end of the insertion hole 6 during traveling. When fixed, the auxiliary wheel stay 3 is rotated by sliding the fitting portion 3a from one end of the insertion hole 6 to the other end so that the auxiliary wheel stay 3 can be folded toward the rear wheel of the bicycle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary wheel for a folding bicycle, which can be folded when the bicycle is stored. Further, the present invention relates to a folding bicycle including this auxiliary wheel.

[0002]

2. Description of the Related Art Generally, a beginner, especially an infant, who wants to learn a bicycle for the first time often falls and injures frequently because it is not easy to balance. In order to supplement such a problem, conventionally, a bicycle with auxiliary wheels in which auxiliary wheels are attached to both sides of a rear wheel is known. The auxiliary wheels are usually firmly fixed by bolts and nuts at the rear of the bicycle frame so that they will not come off during traveling.

When storing, storing, and transporting a bicycle, a bicycle with auxiliary wheels requires a space for storing, etc. that is wider than the bicycle without auxiliary wheels of the same size. If such a space cannot be secured, conventionally, it has been unavoidable to remove the auxiliary wheels from the bicycle with auxiliary wheels. However, when the auxiliary wheel is removed, it cannot be easily removed with bare hands, so a tool or the like must be used. For this reason, it is necessary to remove the auxiliary wheel, which is troublesome and inconvenient for those who are not familiar with tools and the like. Further, there is also a problem that a bicycle repair shop or the like needs to ask the bicycle repair shop to remove the auxiliary wheels in a home where tools are not provided.

In order to solve these problems, conventionally, an auxiliary wheel mounting mechanism for a bicycle has been developed in which the auxiliary wheel can be removed relatively easily using a driver (see, for example, Patent Document 1). However, when removing the auxiliary wheel from a bicycle having this mechanism, it was necessary to remove the cover body attached to the outside of the auxiliary wheel using a driver. Therefore, as with conventional bicycles with auxiliary wheels,
When removing the auxiliary wheel, it was necessary to use a tool or the like, which was still inconvenient. Further, when the auxiliary wheel is removed from the bicycle having the above mechanism, there is a problem that the bolts and nuts that have locked the auxiliary wheel and the auxiliary wheel itself are lost.

On the other hand, a bicycle stabilizing device has been developed in which the mounting angle of the auxiliary wheel can be adjusted without removing the auxiliary wheel from the bicycle frame (see Patent Document 2).
This stabilizer can adjust the attachment angle of the auxiliary wheel by adjusting the screw attached to the bicycle frame. However, this stabilizer is still inconvenient because it is necessary to loosen the screw using a tool such as a screwdriver when adjusting the mounting angle of the auxiliary wheel. Further, in this stabilizing device, since the auxiliary wheel is fixed only by the pushing force of the screw, there is a risk that the screw loosens during traveling and the auxiliary wheel moves to the upper side or the rear side and the bicycle falls. For this reason, this stabilizer has a serious problem in safety during traveling.

A bicycle having auxiliary wheels that can be folded without using a tool such as a driver has also been developed (see, for example, Patent Documents 3 and 4). However, the auxiliary wheel described in Patent Document 3 functions as a stand, and does not function as an auxiliary wheel for preventing the bicycle from falling when traveling. In addition, Patent Document 4
The auxiliary wheel described in (1) prevents the bicycle from toppling backward when the bicycle is running, and does not prevent the bicycle from falling in the left-right direction. Therefore, none of these auxiliary wheels can prevent the fall in the left-right direction during traveling,
There was a problem that safety during driving could not be ensured.

On the other hand, from the viewpoint of saving space when storing a bicycle or the like, recently, a foldable bicycle has been developed which can be folded in two around a connecting portion of a bicycle frame. However, when folding a bicycle that has auxiliary wheels on both sides of the rear wheel into two, the auxiliary wheel and the front wheel collide with each other, and the front wheel and the rear wheel are piled up without being folded in two. There was a problem that space was required. Further, since the auxiliary wheel attached to the side opposite to the folding side protrudes outward in the folded state, there is a problem in safety such that the user may stumble on the auxiliary wheel and fall. .

[0008]

[Patent Document 1] Japanese Patent Application Laid-Open No. 11-321739 (Claim 1, page 2, paragraphs [0004] to [0006])

[Patent Document 2] Japanese Patent Publication No. 6-503771 (Claims, page 8, upper right column, lines 5 to 14, FIG. 13)

[Patent Document 3] Japanese Utility Model Publication No. 4-13141 (claims, FIGS. 3 and 4)

[Patent Document 4] Japanese Utility Model Laid-Open No. 4-3886 (claim 4, claim 7, FIG. 9)

[0009]

[Problems to be Solved by the Invention]

The present invention has been made in view of the above problems, and is foldable when storing a bicycle,
It is intended to provide an auxiliary wheel for a folding bicycle.
Further, the present invention has an excellent safety that the auxiliary wheels are not accidentally folded when the vehicle is running, and the auxiliary wheels are not removed when the vehicle is folded. It is an object of the present invention to provide a folding bicycle with auxiliary wheels that can be folded compactly with the rear wheels being substantially overlapped.

[0011]

Means for Solving the Problems The present inventor has earnestly studied means for ensuring safety during traveling and for compactly folding and storing a bicycle without removing auxiliary wheels from the bicycle when folding the bicycle. As a result, the auxiliary wheel can be easily folded to the rear wheel side with one-touch during storage, transportation, and storage, and it can be accidentally folded or the height fluctuates when riding a bicycle (the distance from the ground is large. The present invention has been completed by finding a folding mechanism that is also excellent in safety.

That is, the object of the present invention is achieved by the following auxiliary wheels for a folding bicycle. (1) A foldable bicycle auxiliary wheel that is foldable, having a fitting hole at one end for fitting a fixing means,
And an auxiliary wheel stay having an auxiliary wheel on the other end side, an insertion hole for inserting the fitting portion of the fixing means, and an opening for inserting one end side of the auxiliary wheel stay having the fitting hole. An auxiliary wheel stay receiving fitting, and a fixing means for fixing the auxiliary wheel stay receiving fitting and the auxiliary wheel stay by fitting a fitting portion into a fitting hole of the auxiliary wheel stay, The auxiliary wheel stay is received by the fixing means in a state where the fitting portion is in contact with one end of the insertion hole so that the auxiliary wheel stay does not move to the rear side and the upper side during traveling. The auxiliary wheel stay is fixed to a metal fitting, and when folded, the fixation by the fixing means is released, and the fitting portion is slid from one end to the other end of the insertion hole to rotate the auxiliary wheel stay, thereby rear side of the bicycle. The supplement that can be folded into Wheel. (2) The auxiliary wheel according to (1), wherein the other end of the insertion hole is arranged on the front side and / or the lower side of one end of the insertion hole. (3) The insertion hole is substantially L-shaped or substantially linear (2)
Auxiliary wheel described in. (4) The auxiliary wheel according to any one of (1) to (3), wherein the opening side of the auxiliary wheel stay receiving fitting is tubular. (5) The auxiliary wheel according to any one of (1) to (4), wherein the fixing means is a bolt with a handle or a bolt with a one-touch tightening lever. (6) An urging means for applying an urging force to the auxiliary wheel stay is provided inside the auxiliary wheel stay bracket. (1)
The auxiliary wheel according to any one of to (5). (7) The biasing means is a coiled spring (6)
Auxiliary wheel described in.

In the auxiliary wheel of the present invention, the auxiliary wheel stay is assisted in a state where the fitting portion is in contact with one end of the insertion hole so that the auxiliary wheel stay does not move to the rear side and the upper side during traveling of the bicycle. It is fixed at the opening of the wheel stay bracket. As a result, with the auxiliary wheel of the present invention, the auxiliary wheel does not move to the rear side and the upper side during traveling of the bicycle, so that the auxiliary wheel is not accidentally folded during traveling, which is excellent when traveling. The safety can be secured. In addition, the auxiliary wheel of the present invention,
At the time of folding, the auxiliary wheel stay can be rotated and folded to the rear wheel side of the bicycle by releasing the fixing by the fixing means and sliding the fitting portion from one end to the other end of the insertion hole. Thus, the auxiliary wheel of the present invention is convenient because it is not necessary to remove the auxiliary wheel from the bicycle when storing, storing, or transporting, and the bolts and nuts that have locked the auxiliary wheel, and further the auxiliary wheel. There is no loss of.

Further, the object of the present invention is achieved by the following folding bicycle with auxiliary wheels. (1) A folding bicycle with auxiliary wheels including the auxiliary wheels. (2) The folding bicycle according to (1), which can be folded in two around a connecting portion of a bicycle frame. (3) The folding bicycle according to (1) or (2), wherein the auxiliary wheel is connected to a rear end portion of the bicycle frame and / or an axle of the rear wheel. (4) The folding bicycle according to (1) to (3), further including a supporting stand. (5) The supporting stand is provided below the bicycle frame and behind the center of the frame (1) to
The bicycle according to any one of (4). (6) The folding bicycle according to any one of (1) to (5), in which the bicycle saddle can be raised and lowered by a handle lever type fixing means. (7) The folding bicycle according to any one of (1) to (6), wherein the bicycle handlebar can be folded in two around a connecting portion of the handle post. (8) The folding bicycle according to any one of (1) to (7), which is used for infants.

The folding bicycle with auxiliary wheels of the present invention includes the foldable auxiliary wheels. Therefore, with the folding bicycle of the present invention, it is possible to ensure excellent safety when riding, and also when storing, storing, or transporting the bicycle, the auxiliary wheel can be easily removed with one touch without removing the auxiliary wheel. Can be folded to the wheel side. In addition, the folding bicycle of the present invention, when folded in two at the connecting portion of the bicycle frame, does not cause the auxiliary wheels and the front wheels to collide,
The front wheel and the rear wheel can be folded in two in a state where they are almost overlapped with each other, and there is no protrusion of the auxiliary wheel on the side opposite to the folding side.
A bicycle with auxiliary wheels (especially a bicycle for infants) that can be transported can be provided.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an auxiliary wheel for a folding bicycle and a folding bicycle with an auxiliary wheel including the auxiliary wheel of the present invention will be described in detail with reference to the drawings. In addition,
The auxiliary wheel in the present invention means a pair of auxiliary wheels provided on both sides of the rear wheel of the bicycle in order to prevent the bicycle from tipping over in the left-right direction during traveling, such as an auxiliary wheel used as a stand or a rear wheel. It does not include auxiliary wheels that are provided to prevent falls. Further, in the present invention, the front side, the rear side, the upper side and the lower side are with respect to the bicycle main body and mean the directions of up, down, left and right as viewed from the bicycle main body, and the upper side and the lower side are the diagonal upper side and the diagonal lower side. Is also included.

FIG. 1 is a schematic explanatory view of an auxiliary wheel of the present invention. As shown in FIG. 1, the auxiliary wheel main body 1 of the present invention has an auxiliary wheel stay receiving fitting 2, an auxiliary wheel stay 3, and a fixing means 4.

The auxiliary wheel stay receiving fitting 2 is, for example, as shown in FIG.
As shown in FIG. 3, the auxiliary wheel stay 3 has an opening 5 at its end for inserting the auxiliary wheel stay 3, and the auxiliary wheel stay 3 is inserted into the opening 5 and fixed by the fixing means 4. The stay 3 can be fixed in the auxiliary wheel stay receiving fitting 2. The shape of the opening 5 is the auxiliary wheel stay 3
It can be appropriately determined according to the shape of, and is preferably cylindrical. The cylindrical opening 5 preferably has a circular cross section, but if the auxiliary wheel stay 3 is rotatable in the auxiliary wheel stay receiving fitting 2, the circular shape also includes a slightly deformed shape. . Furthermore, the auxiliary wheel stay bracket 2 is
The insertion hole 6 can be formed near the opening 5. The insertion hole 6 is a hole for inserting the fitting portion 4-I of the fixing means 4, and is fixed in a state where the fitting portion 4-I is in contact with one end (upper end) of the insertion hole 6 during traveling. . The shape of the insertion hole 6 can be various shapes such as a substantially L-shape, a substantially straight shape, and a curved shape. However, in consideration of durability of the auxiliary wheel stay bracket 2, safety during traveling, and the like. , The other end (lower end) of the insertion hole 6
Are preferably arranged on the front side and the lower side of one end (upper end) thereof, and more preferably substantially L-shaped or substantially linear. Particularly, in order to prevent the auxiliary wheel stay 3 from moving to the rear side and the upper side during traveling of the bicycle, the insertion hole 6 rotates the auxiliary wheel stay 3 in the traveling direction (front wheel side) and can be folded to the rear wheel side. It is preferable that the insertion hole is formed in a substantially L-shape or a substantially linear shape.

Here, the shape of the insertion hole 6 will be specifically described with reference to FIG. FIG. 2 shows a preferable shape of the insertion hole 6 in the present invention. 2A to 2C show a substantially linear insertion hole 6, and FIG. 2D shows a substantially L-shaped insertion hole 6.

FIG. 2A shows an embodiment having a substantially straight insertion hole 6 on the opening 5 side in a direction perpendicular to the direction in which the auxiliary wheel stay 3 is inserted. For convenience of description, the front wheel side will be described as the left side and the rear wheel side will be described as the right side. Figure 2
The right end (one end: 6a) of the insertion hole 6 in FIG.
The auxiliary wheel stay 3 is provided at a position perpendicular to the rear wheel when the fitting portion of is abutted. Also,
The left end (the other end: 6b) of the insertion hole 6 is substantially parallel to the rear wheel side when the auxiliary wheel stay 3 is brought into contact with the fitting portion 4-I of the fixing means 4 when sliding and abutting. Is drilled at the position.

FIG. 2B shows an embodiment of a substantially straight insertion hole 6 having step holes 7 and 7'having a diameter slightly larger than the insertion hole width. During traveling, the auxiliary wheel stay 3 is fixed while the step portion 4-IV of the fixing means 4 is brought into contact with the step hole 7. On the other hand, at the time of folding, the auxiliary wheel stay 3 is folded to the rear wheel side while the step portion 4-IV of the fixing means 4 is brought into contact with the step hole 7 ′. The position of the insertion hole 6 in FIG. 2B is the same as that in FIG. 2A.

2B, the auxiliary wheel stay 3 can be fixed while the step portion 4-IV of the fixing means 4 is fitted in the step hole 7, and the fixing means 4 is slightly loosened. Even in the state, since the step portion 4-IV stops in the step hole 7, the auxiliary wheel stay 3 can be made difficult to move. Also, step 4-IV
Even after sliding the other end to the other end, the step portion 4-in the step hole 7 '.
Since the IV is fitted, the auxiliary wheel stay 3 can be easily and reinforced even after being folded.
In this way, by forming the step holes 7, 7 in the insertion hole 6, it is possible to further improve the safety during traveling and the fixing after folding.

FIG. 2C shows an embodiment of a substantially linear insertion hole 6 formed obliquely upward with respect to the connecting direction of the auxiliary wheel stay 3 on the opening 5 side. Stepped holes 7 and 7 ′ are provided at both ends of the insertion hole 6 shown in FIG. 2C, and the auxiliary wheel is attached while the fitting portion of the fixing means 4 is in contact with the position of the stepped hole 7 during traveling. The stay 3 is fixed by the fixing means 4.
On the other hand, at the time of folding, the fitting portion 4-I of the fixing means 4 is slid from the step hole 7 to the step hole 7'arranged in the downward oblique direction, and the fitting portion 4-I of the fixing means 4 is moved to the step hole 7 '. The auxiliary wheel stay 3 can be folded to the rear wheel side in a state of being brought into contact with the rear wheel side. When the insertion hole 6 of the aspect shown in FIG. 2 (C) is provided, it is possible to improve the running safety and the fixing after folding of the step holes 7 and 7 ′ described in FIG. 2 (B). When the auxiliary wheel is folded, the auxiliary wheel stay 3 is slanted downward (see FIG. 2).
In (C), the auxiliary wheel stay 3 can be easily rotated and folded while sliding in the lower left diagonal direction.

FIG. 2D shows an embodiment in which an inverted L-shaped insertion hole 6 is formed downward from the substantial center of the opening 5 of the auxiliary wheel stay receiving fitting 2. 2D, during traveling, the auxiliary wheel stay 3 is fixed in a state in which the fitting portion 4-I of the fixing means 4 is in contact with the position of the one end (6a) of the insertion hole 6. At the time of folding, the fitting portion 4-I of the fixing means 4 is slid from one end (6a) to the other end (6b) on the lower side so that the fitting portion 4-I of the fixing means 4 contacts the other end (6b). The auxiliary wheel stays 3 can be folded to the rear wheel side in the contact state. The insertion hole 6 of the present invention can also be formed in a substantially L shape in the direction opposite to the shape of FIG. For example, if the right side of FIG. 2D is the front wheel direction and the left side is the rear wheel direction, the bicycle can be folded to the front side.

The end of the auxiliary wheel stay receiving bracket 2 on the side where it is attached to the bicycle frame is preferably in the shape of a spatula (flat cylinder) as shown in FIG. The auxiliary wheel stay receiving fitting 2 has a mounting hole 8 at its spatula-shaped end for mounting to the rear end of the bicycle frame. The auxiliary wheel stay bracket 2 is attached to the rear end of the bicycle frame by the auxiliary wheel attachment member 9 (see FIG. 4) through the attachment hole 8. The auxiliary wheel mounting member 9 is not particularly limited as long as the auxiliary wheel can be fixed to the rear portion of the bicycle frame, and may be, for example, a nut or a nut with resin.

The auxiliary wheel stay 3 is fixed by the fixing means 4 in the auxiliary wheel stay receiving fitting 2 with one end side thereof being inserted into the opening 5 of the auxiliary wheel stay receiving fitting 2.
As shown in FIG. 1, the auxiliary wheel stay 3 has a fitting hole 3a for fitting the fitting part 4-I of the fixing means 4 to the stay on the side to be inserted into the opening 5, and vice versa. The auxiliary wheel 10 (see FIG. 4) is provided at the side end. The shape, length and the like of the auxiliary wheel stay 3 in the present invention are not particularly limited, but have a length that can safely assist the bicycle and have a substantially L-shape or a substantially linear shape. It is preferable. From the viewpoint of safety and weather resistance, it is preferable that the auxiliary wheel stay 3 covers the portion other than the portion to be inserted into the opening 5 with, for example, a stretchable resin.

The size of the auxiliary wheel 10 is not particularly limited, and depends on the height of the auxiliary wheel stay 3 and the distance to the ground when the auxiliary wheel stay 3 is attached to the rear end of the bicycle frame. It can be determined appropriately. Auxiliary wheel 1
For 0, a known auxiliary wheel can be used by appropriately adjusting the height of the auxiliary wheel stay 3.

FIG. 3 shows an embodiment in which the biasing means 11 is provided inside the auxiliary wheel stay receiving fitting 2. As shown in FIG. 3, when the urging means 11 is provided inside the auxiliary wheel stay receiving bracket 2, the auxiliary wheel stay receiving bracket 2 is assisted by the urging force (tensile force or strain force) of the urging means 11. The distance between the wheel stay 3 and the auxiliary wheel stay receiving fitting 2 can be maintained constant. Further, when the auxiliary wheel is folded, a tensile force by the urging means 11 acts on the auxiliary wheel stay 3, so that the auxiliary wheel stay 3 can be fixed to the auxiliary wheel stay receiving fitting 2 in a good state. The shape, material and the like of the biasing means 11 are not particularly limited as long as they can be housed inside the auxiliary wheel stay receiving fitting, but a coil spring made of steel, for example, can be preferably used.

The fixing means 4 can be inserted into the insertion hole 6 and is fitted into the fitting hole 3a so as to be fitted thereinto.
I have. The fixing means 4 can fix the auxiliary wheel stay 3 in the state in which it is inserted in the auxiliary wheel stay receiving metal fitting 2 by fitting the fitting portion 4-I into the fitting hole 3a. The fixing means 4 attaches the auxiliary wheel stay 3 to the auxiliary wheel stay receiving fitting 2
It is not particularly limited as long as it can be fixed to, and for example, the embodiments shown in FIGS. 1 and 4 to 9 can be preferably used.

Fixing means 4 shown in FIGS. 1 and 4 to 7.
Is a form of the bolt 4a with a handle, and the fitting portion 4-I and the fitting hole 3a are fitted by screwing. For example, as shown in FIG. 1, the bolt 4a with a handle has a fitting portion (screw portion) 4-I and a head portion (screw head) 4 having a predetermined pitch.
-II and. A washer 4-III for facilitating the fixation of the auxiliary wheel stay 3 and the auxiliary wheel stay receiving fitting 2 can be used in the bolt 4a with a handle.

The bolt 4a with a handle is provided so that the head 4 can be easily loosened or tightened with bare hands without using a tool or the like.
It is preferable to make the diameter of -II larger than the diameter of the screw portion 4-I and to form a concave groove or the like on the outer circumference of the head portion 4-II.
Furthermore, the bolt with handle 4a includes the fitting portion 4-I and the head portion 4a.
It is also possible to provide a step 4-IV between -II (Fig. 2).
(See (B)). The step portion 4-IV can fix the auxiliary stay receiving metal fitting 2 by being fitted into the step hole 7 of the insertion hole 6.

8 and 9 show another mode of the fixing means 4. 8 and 9 show a mode in which the fixing means 4 in the present invention is a bolt 4b with a one-touch tightening lever. The one-touch tightening lever-equipped bolt 4b has a cam mechanism, and as shown in FIG. 8, by placing the pin in a lying state (a state in which the pin is tilted to the rear wheel side), the outside of the auxiliary wheel stay bracket 2 To auxiliary wheel stay bracket 2
Also, the auxiliary wheel stay 3 can be pushed in and fixed in a state where the auxiliary wheel stay 3 is connected to the auxiliary wheel stay receiving fitting 2. On the other hand, when the auxiliary wheel of the bicycle is folded, the bolt 4b with a one-touch tightening lever is used in a standing state (a state in which it is raised from the rear wheel side to the auxiliary wheel side). When the one-touch tightening lever bolt 4b is raised, the cam mechanism allows the one-touch tightening lever bolt 4b to
The pushing force due to is relaxed, and the fixation between the auxiliary wheel stay 3 and the auxiliary wheel stay receiving fitting 2 is released. In this state, the auxiliary wheel stay 3 can be folded to the rear wheel side of the bicycle by rotating the auxiliary wheel stay 3 in the direction shown in FIG. 9 or in the direction opposite to that shown in FIG.

Next, the folding operation of the auxiliary wheel of the present invention will be described with reference to FIGS. 4 to 7 show
It is explanatory drawing for demonstrating a folding operation when the fixing means 4 is the bolt 4a with a handle. FIG. 4 is a state diagram of the auxiliary wheel before folding the auxiliary wheel, FIG. 5 is a state diagram during folding of the auxiliary wheel, and FIGS. 6 and 7 are state diagrams after folding the auxiliary wheel. When the auxiliary wheel is not folded, that is, when the bicycle with the auxiliary wheel is used, the bolt 4a with the handle is fitted to the one end (6a) of the insertion hole 6 by the fitting portion 4a.
The auxiliary wheel stays 3 are tightly tightened in a state where they are in contact with each other, and the auxiliary wheel stays 3 are firmly fixed in the auxiliary wheel stay brackets 2. When folding the auxiliary wheel, as shown in FIG. 4, the head portion 4-II of the bolt with handle 4a is rotated in the direction in which the screw is loosened to release the fixing by the bolt with handle 4a. After the fixing of the bolt with handle 4a is released, as shown in FIG. 5, the fitting portion 4-I of the bolt with handle 4a is slid along the insertion hole 6 from one end (upper side) to the other end (lower side). Then, the fitting portion 4-I of the bolt with handle 4a is brought into contact with the other end. Next, as shown in FIG. 6 or 7, after rotating the auxiliary wheel stay 3 to the rear wheel side of the bicycle, the head portion 4-II of the bolt 4a with a handle is rotated in the screw tightening direction, The auxiliary wheel stay 3 is fixed to the auxiliary wheel stay receiving fitting 2. By such a series of operations, the auxiliary wheel is folded to the rear wheel side.

8 and 9 are explanatory views for explaining the folding operation when the fixing means 4 is the bolt 4b with a one-touch tightening lever. FIG. 8 is a state diagram of the auxiliary wheel before folding the auxiliary wheel, and FIG. 9 is a state diagram of the auxiliary wheel after folding the auxiliary wheel.

As shown in FIG. 8, before folding the auxiliary wheel, the one-touch tightening lever bolt 4b is laid sideways (locked). When folding the auxiliary wheel, one-touch tightening lever bolt 4
With b raised (the lock is released), the one-touch tightening lever-equipped bolt 4b releases the fixation. Next, one-touch tightening lever bolt 4b
In the upright state, the fitting portion of the one-touch tightening lever bolt 4b is slid along the insertion hole 6 from one end (upper side) to the other end (lower side). Next, auxiliary wheel stay 3
Fold the auxiliary wheel by rotating the to the rear wheel side of the bicycle. After folding the auxiliary wheel, as shown in FIG. 10, the one-touch tightening lever bolt 4b is returned to the original state (locked state) to fix the auxiliary wheel stay 3 to the auxiliary wheel stay bracket 2. Although FIG. 10 shows an example in which the auxiliary wheel stay 3 is rotated to the side opposite to the traveling direction and folded, the auxiliary wheel of the present invention is further rotated in the traveling direction to be folded. It can also be fixed with.

Next, a bicycle including the auxiliary wheel of the present invention will be described in detail. The bicycle of the present invention includes the auxiliary wheel of the present invention. FIG. 10 shows a preferred embodiment of the bicycle of the present invention. In FIG. 10, the bicycle body 21 of the present invention is
Auxiliary wheel 22, frame 23, handle 24, saddle 2
5, a front wheel 26, a rear wheel 27, a pedal 28, a car 33 and a stand 34.

The bicycle body 21 is preferably foldable in two around the connecting portion 29 of the frame 23. Figure 11
12 and FIG. 12 are explanatory views for explaining a state in which the bicycle main body 21 is folded in two around the connecting portion 29 of the frame 23. 10 to 12, the auxiliary wheel 2
2 is fixed to the rear end of the bicycle frame 23,
The position where the auxiliary wheel of the present invention is attached is not limited to this position, and the bicycle can be mounted on the bicycle frame 23.
It is also possible to move the auxiliary wheel 22 from the rear end of the bicycle frame 23 to the front wheel side so that the auxiliary wheel 22 does not collide with the front wheel 26 when it is folded around the connecting portion. Preferably, the auxiliary wheel may be connected to the rear end of the bicycle frame and / or the axle of the rear wheel.

As shown in FIG. 11, in the bicycle main body 21 of the present invention, the auxiliary wheel 22 is folded by the above-mentioned folding operation before the frame 23 is folded, and the auxiliary wheel 22 is pulled to the rear wheel 27 side. To do. In this state, if the frame 23 is folded in two at the connecting portion 29, the front wheel 26 and the rear wheel 27 can be folded in two without the auxiliary wheel 22 colliding with the front wheel 26. In addition, since the auxiliary wheel 22 on the side opposite to the folding direction can be stored without protruding, there is no possibility that the user falls over the auxiliary wheel 22 and falls.

The bicycle body 21 can have a supporting stand 34, as shown in FIG. Since the conventional bicycle with auxiliary wheels has auxiliary wheels, it is not necessary to provide the supporting stand 34. However, since the auxiliary wheel 22 of the bicycle with auxiliary wheels of the present invention is foldable, the auxiliary wheel 22 cannot be stably stored in a standing state, such as when it is stored in a folded state, and leans against a wall. Or you have to bring it to the ground. On the other hand, when the bicycle body 21 is folded in two at the connecting portion 29 of the frame 23, it is unstable to stand in the folded state. Therefore,
When folding the auxiliary wheel 22 or the bicycle main body 21, it is preferable to attach the supporting stand 34. If the support stand 34 is used, stable storage and the like can be performed in a state in which the auxiliary wheel 22 is folded or the bicycle main body 23 is folded up and does not lean against a wall or the like.

The supporting stand 34 is provided at a position where it does not interfere with the folding operation of the auxiliary wheel 22 and the folding operation of the bicycle frame 23, and is preferably below the bicycle frame 23 and in the center of the bicycle frame 23. It is installed in the rear. The support stand 34 is provided below the bicycle frame 23 when the bicycle is used.
Can be stored in a position behind the center. For this reason,
The support stand 34 does not get in the way when the bicycle body 21 is used.

As shown in FIG. 11 or 12, when the bicycle main body 21 is folded in two around the connecting portion 29 of the bicycle frame 23 and stored, the supporting stand 34 is used as the bicycle frame 23. It is used by inverting it from the lower center of the center and inverting it to the ground. In such a state, the bicycle body 21 can be stably stored even after being folded in two. When the bicycle main body 21 is unfolded and returned to the original bicycle main body 21, the supporting stand 34 can be easily stored by gently tilting it backward.

In the bicycle main body 21, the bicycle saddle 25 has a handle lever type fixing means 30 at the upper end of the bicycle frame 23 so that the height of the saddle can be adjusted with one touch according to the body shape of the user. It is preferable to be attached so that it can be raised and lowered.

The bicycle handle 24 is preferably folded in two around the handle post connecting portion 31 in order to save space. The bicycle handle 24 is preferable if it is fixed to the frame fixing post by the handle lever type fixing means 32 because the angle of the handle can be easily adjusted. When the bicycle handle 24 is folded, the handle lever type fixing means 32 may be loosened so that the bicycle handle 24 may be turned sideways, or the bicycle handle 24 may be pulled out from the bicycle frame 23. Since the auxiliary wheel bicycle can be made compact by loosening or pulling out the bicycle handlebar 24,
It can be easily put in a dedicated storage bag and is very convenient for storage in a closet at home.

The sizes of the front wheels 26 and the rear wheels 27, the thickness of the tires, etc. are not particularly limited, and wheels used in general bicycles with auxiliary wheels can be used. Further, the wheels of the front wheels 26 and the rear wheels 27 are not particularly limited, and wheels having various shapes can be used. The bicycle pedal 28 is preferably foldable in the vertical direction used in a general folding bicycle.

The car 33 may be fixed to the bicycle handlebar 24 or may be removable from the bicycle handlebar 24. Bicycle handle 2
A more compact storage or the like is possible by hooking the car 33 on 4 with a hook or the like and removing the car 33 from the bicycle handle 24 when folding.

There is no particular limitation on the material of the constituent parts of the folding bicycle of the present invention, and the bicycle can be manufactured using the material used in the known bicycle. From the viewpoint of weight reduction, portability, and corrosion resistance, it is preferable to use a lightweight material such as aluminum as a material for the bicycle frame 23 and the spokes of the wheels.

As described above, the auxiliary wheel of the present invention can be folded without using a tool or the like. Therefore, the auxiliary wheel of the present invention can be suitably used for a bicycle with an auxiliary wheel. In particular, a folding bicycle with an auxiliary wheel that can be folded almost completely in two around a connecting portion of a bicycle frame has not been developed so far, and thus the present invention is a novel foldable folding type that contributes to space saving. Used as a bicycle with auxiliary wheels.

[0048]

As described above, in the auxiliary wheel of the present invention, the fitting portion is brought into contact with one end of the insertion hole so that the auxiliary wheel stay does not move rearward or upward with respect to the traveling direction. In this state, the auxiliary wheel stay is fixed in the auxiliary wheel stay receiving fitting by the fixing means. With this, the auxiliary wheel of the present invention can prevent the bicycle from toppling over while traveling, and at the same time, the auxiliary wheel does not move to the rear side or the upper side during traveling,
Excellent safety during driving can be secured. Further, the auxiliary wheel of the present invention, when folded, releases the fixation by the fixing means and slides the fitting portion from one end of the insertion hole to the other end, and rotates the auxiliary wheel stay to the rear wheel side of the bicycle. Folds in. With this, the auxiliary wheel of the present invention is convenient because it is not necessary to remove the auxiliary wheel from the folding bicycle during storage, storage, and transportation, and further, the bolts and nuts that have locked the auxiliary wheel,
Furthermore, it is possible to prevent the auxiliary wheel from being lost.

The folding bicycle with auxiliary wheels of the present invention includes the foldable auxiliary wheels. Therefore, with the folding bicycle of the present invention, it is not necessary to use a tool or the like to remove the auxiliary wheel even when the bicycle is folded, stored, stored, or transported, and the auxiliary wheel can be easily and easily operated with one touch. Can be folded. In addition, the auxiliary wheels are not accidentally folded when the bicycle is running, which is excellent in safety. In particular, if the connecting portion of the bicycle frame can be folded in two, it is possible to completely fold the front wheel and the rear wheel in a substantially overlapping state without causing the auxiliary wheel and the front wheel to collide with each other. Because it is possible and there is no protrusion of auxiliary wheels,
It is possible to provide a bicycle with auxiliary wheels that can be safely stored, stored, transported, etc. in a small space.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of an auxiliary wheel of a bicycle of the present invention.

FIG. 2 is an explanatory view showing a preferred embodiment of the holes of the auxiliary wheel stay receiving fitting in the present invention.

FIG. 3 is an explanatory view of an embodiment having an elastic body in the opening of the auxiliary wheel stay receiving fitting in the present invention.

FIG. 4 is a state diagram of the auxiliary wheel before folding the auxiliary wheel according to the present invention.

FIG. 5 is a state diagram of the auxiliary wheel in the process of folding the auxiliary wheel according to the present invention.

FIG. 6 is a state diagram (No. 1) of the auxiliary wheel after folding the auxiliary wheel in the present invention.

FIG. 7 is a state diagram (No. 2) of the auxiliary wheel after folding the auxiliary wheel in the present invention.

FIG. 8 is a state diagram of the auxiliary wheel before folding the auxiliary wheel in the present invention.

FIG. 9 is a state diagram of the auxiliary wheel after folding the auxiliary wheel according to the present invention.

FIG. 10 is a schematic explanatory view of a bicycle with auxiliary wheels of the present invention.

FIG. 11 is an explanatory view (No. 1) showing a folded state of the bicycle with auxiliary wheels of the present invention.

FIG. 12 is an explanatory view (No. 2) showing a folded state of the bicycle with auxiliary wheels of the present invention.

[Explanation of symbols]

1 auxiliary wheel body 2 Auxiliary wheel stay bracket 3 auxiliary wheel stay 4 fixing means 4a Bolt with handle 4b One-touch bolt with tightening lever 5 openings 6, 6a, 6b insertion hole 7,7 'step hole 8 mounting holes 9 Auxiliary wheel mounting bracket 10 auxiliary wheels 11 Biasing means 21 Bicycle body 22 auxiliary wheels 23 Bicycle frame 24 Bicycle handle 25 bicycle saddle 26 front wheels 27 rear wheel 28 bicycle pedals 29 Connection 30 Handle lever type fixing means 31 Connection 32 Handle lever type fixing means 33 baskets 34 Support stand

Continuation of the front page (56) Reference JP-A-5-263813 (JP, A) JP-A-7-10005 (JP, A) JP-A-1-148675 (JP, A) JP-A-50-143250 (JP , A) JP 2001-294186 (JP, A) Actual Open Flat 4-3886 (JP, U) Actual Open Sho 62-181484 (JP, U) Actual Open Sho 59-78190 (JP, U) Actual Open Sho 59 -196385 (JP, U) Actual public 47-12651 (JP, Y1) Actual public 47-11858 (JP, Y1) Special table flat 6-503771 (JP, A) Registered utility model 3023795 (JP, U) Registered Utility model 3078139 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B62H 1/12 B62K 9/00 B62K 15/00

Claims (13)

(57) [Claims] 1. To be used in a folding bicycle for infants
A foldable auxiliary wheel for a folding bicycle, which has a fitting hole for fitting a fixing means at one end side and an auxiliary wheel stay at the other end side, and an auxiliary wheel stay of the fixing means. Auxiliary wheel stay receiving fitting having an insertion hole for inserting the fitting portion and an opening for inserting one end side of the auxiliary wheel stay having the fitting hole formed therein, and the fitting hole of the auxiliary wheel stay The auxiliary wheel stay receiving metal fitting and the fixing means for fixing the auxiliary wheel stay by fitting the fitting portion to the auxiliary wheel stay so as to prevent the auxiliary wheel stay from moving rearward and upward during traveling. , Fixing the auxiliary wheel stay to the auxiliary wheel stay receiving metal fitting by the fixing means in a state where the fitting portion is in contact with one end of the insertion hole, and releasing the fixing by the fixing means at the time of folding, The fitting portion of the insertion hole It said auxiliary wheel said auxiliary wheel the stay can be folded to the rear wheel side of the bicycle rotates by sliding from side to the other end. 2. The auxiliary wheel according to claim 1, wherein the other end of the insertion hole is arranged on the front side and / or below the one end of the insertion hole. 3. The auxiliary wheel according to claim 2, wherein the insertion hole is substantially L-shaped or substantially linear. 4. The auxiliary wheel according to claim 1, wherein the opening side of the auxiliary wheel stay receiving fitting is tubular. 5. The auxiliary wheel according to claim 1, wherein the fixing means is a bolt with a handle or a bolt with a one-touch tightening lever. 6. The opening of the auxiliary wheel stay receiving bracket,
The auxiliary wheel according to any one of claims 1 to 5, further comprising an urging means for applying an urging force to the auxiliary wheel stay. 7. The auxiliary wheel according to claim 6, wherein the biasing means is a coil spring. 8. A folding bicycle for infants, comprising the auxiliary wheel according to any one of claims 1 to 7. 9. The bicycle according to claim 8, which is foldable in two around the connecting portion of the bicycle frame. 10. The bicycle according to claim 8, further comprising a supporting stand. 11. The bicycle according to claim 8, wherein the supporting stand is provided below the bicycle frame and behind the center of the bicycle frame. 12. The bicycle according to claim 8, wherein the bicycle saddle can be raised and lowered by a handle lever type fixing means. 13. The bicycle according to claim 8, wherein the bicycle handlebar is foldable in two around the connecting portion of the handlebar post.