JP2015051740A - Folding type bicycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a folding type bicycle which can be fixed sufficiently with an easy fixing operation during the process of a folding operation.SOLUTION: The folding type bicycle includes a first fixing member 25 serving as an engaging part and a second fixing member 35 serving as an engaged part. As an opening defined by a long piece 35a1 and a short piece 35a2 is almost V-shaped to guide an engaging piece to deep inside, the engaged part has a guide part to guide the engaging part to a predetermined position. A lock part for restricting turning of a front wheel side frame and a rear wheel side frame in a development direction is provided at a depth side end part of a guide route of the guide part, that is, an engaging position of the end where the engaging piece is guided at the tip 35a. As a result of the lock part being present at such a position, the bicycle can be fixed in a condition of being abutted on the end part of the guide part when folded, thereby dispensing with a positioning operation.

Description

  The present invention relates to a folding bicycle, and more particularly, to a fixing mechanism thereof.

A foldable bicycle is used in which a first frame and a second frame are connected by a support shaft, and are folded by rotating about the support shaft.
As a fixing mechanism for fixing the folded first frame and the second frame, a mechanism disclosed in Japanese Patent Application Laid-Open No. 2004-151867 is known.
In the case of the fixing mechanism shown in the same publication, the steering mechanism is operated by steering the front wheel after folding, and steering operation so that the fixing member on the movable side of the front wheel shaft is inserted into the groove on the standby side of the rear wheel shaft. Fixed by. Further, the fixing member on the movable side of the front wheel shaft is inserted into the groove on the standby side of the rear wheel shaft to complete the fixing. The groove on the standby side is formed with a convex rib so as to interfere with the insertion path of the fixing member, and functions as a retainer by overcoming the convex rib and pushing it in.

  Moreover, the gazette of patent document 2 discloses the structure which temporarily fixes using a magnetic body.

Utility Model Registration No. 3075708 Japanese Patent No. 3596425

In the conventional folding type bicycle, it functions as a retainer by pushing over the convex ribs, but the function as a retainer and fixing is insufficient because it merely pushes in.
In addition, the thing using a magnetic body is only temporary fixing which remove | deviates easily, and remove | deviates from the fixing mechanism like this invention.

  The present invention provides a foldable bicycle that can be fixed easily and easily during a folding operation.

  The present invention provides a folding bicycle that can be folded and unfolded by a pivoting operation, and includes a fixing mechanism that is fixed in a folded state, and the fixing mechanism includes an engaging portion that is supported by a first movable portion, An engaged portion supported by a movable portion and engageable with the engaging portion, and the engaged portion guides the engaging portion to a predetermined engaging position in the process of folding operation. A locking portion that restricts rotation of the first movable portion and the second movable portion in the unfolding direction at the engagement position where the engagement portion is guided by the guide portion. As a configuration.

In some folding bicycles, a first frame and a second frame are connected to each other by a support shaft, and are folded by rotating about the support shaft. It can be said that the folding bicycle can be folded and unfolded by a rotating operation.
In the present invention configured as described above, the first frame is a first movable part, and the second frame is a second movable part. By supporting the engaging part on the first movable part and supporting the engaged part on the second movable part, a fixing mechanism composed of the engaging part and the engaged part is obtained, and the folding bicycle is folded. Can be fixed in the state. Further, the engaged portion is provided with a guide portion, and this guide portion guides the engaging portion to a predetermined engaging position in the process of folding operation. Since the locking portion is provided at the engaging position where the engaging portion is guided by the guide portion, the engaging portion and the engaged portion are engaged at the engaging position, and the first movable portion is engaged. The part and the second movable part are restricted from rotating in the deployment direction.

  That is, at the time of folding, the folding operation can be performed along the guide portion, and it is guided as it is to the fixing portion of the fixing mechanism, so that the folding workability is good.

  According to the present invention, the folding bicycle that can complete the fixing operation by the fixing mechanism at the abutting engagement position only by the folding operation along the guide portion, and can complete the fixing simultaneously with the folding. Can provide.

It is a side view of a folding bicycle. It is a perspective view of the front wheel of a folding bicycle. It is a perspective view of the rear wheel of a folding bicycle. It is a perspective view of the fixing mechanism on the front wheel side of the folding bicycle. It is a perspective view of the fixing mechanism on the rear wheel side of the folding bicycle. It is a perspective view of the folding state of a folding bicycle. It is a schematic diagram which shows the mechanism of folding of a folding-type bicycle. It is a schematic diagram which shows the mechanism of the fixing mechanism at the time of folding of a folding type bicycle. It is a perspective view of the fixation start state of the fixing mechanism of a folding bicycle. It is a perspective view of another viewpoint of the fixation start state of the fixing mechanism of a folding bicycle. It is a perspective view of another viewpoint of the fixation start state of the fixing mechanism of a folding bicycle. It is a perspective view of an engaging piece and a knob part. It is a perspective view of another viewpoint of an engaging piece and a knob | pick part. It is a perspective view of a base part. It is a perspective view of another viewpoint of a base part. It is a top view of a front-end | tip part. It is a perspective view of another viewpoint of a front-end | tip part. It is sectional drawing of the 2nd fixing member containing a front-end | tip part. It is a perspective view of a vehicle body attachment part. It is a perspective view of another viewpoint of a vehicle body attachment part. It is a side view of the fixing completion state of the fixing mechanism of a folding bicycle. It is a perspective view of another viewpoint of the fixing completion state of the fixing mechanism of a folding bicycle. It is sectional drawing of the completion state of fixation of the fixing mechanism of a folding bicycle. It is a perspective view of another viewpoint of the fixing completion state of the fixing mechanism of a folding bicycle.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a side view of a folding bicycle according to an embodiment of the present invention. FIG. 2 is a perspective view showing the front wheel of the folding bicycle, and FIG. 3 is a perspective view showing the rear wheel of the folding bicycle. Each drawing schematically shows only main components. Further, when referred to as front, rear, right, left, upper, and lower in the process to be described later, the direction is based on the direction in which the traveling direction of the bicycle in the normal use state is the front.

  In FIG. 1, the folding bicycle 10 includes a front wheel side member 20 and a rear wheel side member 30, and the front wheel side member 20 and the rear wheel side member 30 are rotatable about a support shaft 40. . A normal use state as shown in FIG. 1 is called an unfolded state, and a storage state as shown in FIG. 6 described later is called a folded state. As a bicycle, the front wheel side frame 21 and the rear wheel side frame 31 constitute a main frame, and the rear end of the front wheel side frame 21 and the front end of the rear wheel side frame 31 are rotated via a support shaft 40. It is pivotally supported. Further, a handle post 22, a handle 23, a front wheel 24, and the like are supported on the front end side of the front wheel side frame 21, and a seat post 32, a saddle 33, a rear wheel 34, and a pedal (not shown) are supported on the rear wheel side frame 31. Etc. are supported.

FIG. 4 is a perspective view showing a fixing mechanism on the front wheel side of the folding bicycle, and FIG. 5 is a perspective view showing a fixing mechanism on the rear wheel side of the folding bicycle.
The fixing mechanism includes a first fixing member and a second fixing member, the first fixing member 25 is fixed to the front wheel shaft of the front wheel 24, and the second fixing member 35 is fixed near the rear wheel shaft of the rear wheel 34. ing.
In the present embodiment, the front wheel side frame 21 corresponds to the first frame, the rear wheel side frame 31 corresponds to the second frame, and each is rotatably connected via the support shaft 40, and A first fixing member 25 and a second fixing member 35 are fixed in the vicinity of the opposite end. More specifically, the first fixing member is fixed near the front wheel shaft, and the second fixing member is fixed near the rear wheel shaft. Of course, the attachment of the first fixing member and the second fixing member is mechanically interchangeable, and it does not matter which side is fixed in the vicinity of the front wheel shaft and which side is fixed in the vicinity of the rear wheel shaft.
The first fixing member 25 corresponds to the engaging portion, and the second fixing member 35 corresponds to the engaged portion. Further, the first movable part corresponds to the first frame, and the second movable part corresponds to the second frame. In the present embodiment, the first movable portion and the second movable portion constitute a frame, but the frame may not necessarily constitute a movable portion for folding in a folding bicycle.

FIG. 6 is a perspective view showing a folding state of the folding bicycle, and FIG. 7 is a schematic view showing a folding mechanism of the folding bicycle.
As shown in FIG. 6, the support shaft 40 is lifted around the support shaft 40 while releasing the fixing mechanism 41 of the support shaft 40. Then, the front wheel side frame 21 and the rear wheel side frame 31 rotate about the same support shaft 40, and when the front wheel 24 and the rear wheel 34 gradually approach each other and are substantially in a parallel state, the first fixing member 25 is moved. And the second fixing member 35 are engaged.
That is, the front wheel 24 is rotatably supported by the front wheel side frame 21 that is the first frame, the rear wheel 34 is rotatably supported by the rear wheel side frame 31 that is the second frame, and the support shaft 40 is the front wheel shaft. So that the front wheel 24 and the rear wheel 34 are arranged in parallel so as not to interfere with each other when the support shaft 40 is rotated from the developed state to the folded state. Moving.

Here, such an operation will be described in detail based on the schematic diagram of FIG.
In the drawing, the first frame that is the front wheel side frame 21 is shown as a first frame FL1, the second frame that is the rear wheel side frame 31 is shown as a second frame FL2, and the support shaft 40 is a support shaft AX. As shown. The axle of the rear wheel 34 is shown as a rear wheel axis Rax, and the axle of the front wheel 24 is shown as a front wheel axis Fax. Usually, both are parallel in a horizontal plane. If the support shaft AX (axial core Cax) is parallel (CPax) to these, the front wheel 24 and the rear wheel are rotated when the first frame FL1 and the second frame FL2 are rotated about the support shaft AX. 34 abuts on the tread surface and is not in a parallel state as shown in FIG. However, as shown in FIG. 7, the support shaft AX is inclined by an angle θ1 with respect to an axis CPax parallel to the rear wheel axis Rax and the front wheel axis Fax. For this reason, when the first frame FL1 and the second frame FL2 are rotated around the support shaft AX, the first frame FL1 and the second frame FL2 are 2 with the same angle θ1 with respect to the support shaft AX in a folded state. Since the rear wheel 34 and the front wheel 24 do not collide with each other, the rear wheel 34 and the front wheel 24 are in a parallel state. Further, in the case of such a folding operation, as long as the support shaft 40 is lifted straight up, the center of gravity is always maintained between the front wheel 24 and the rear wheel 34, so that the folding operation is extremely easy. In other folding operations, the front wheel side frame 21 and the rear wheel side frame 31 often move so as to rotate relative to each other in a horizontal plane, but the center of gravity immediately follows the straight line connecting the front wheel and the rear wheel. Because it comes off, the whole folding bike is likely to fall. And you have to do the folding while paying attention not to fall. However, according to the structure of the present invention, the load of the folding bicycle is supported by the front wheel 24 and the rear wheel 34 before folding, and is supported by the front wheel 24 and the rear wheel 34 during the folding operation, and the center of gravity is also supported by the front wheel 24. Since it does not deviate from the straight line connecting the rear wheel 34 and the rear wheel 34, the folding operation can be completed lightly.
In other words, by lifting the vicinity of the support shaft 40, the front and rear axles are brought close to each other in the front-rear direction while the front wheels 24 and the rear wheels 34 are in contact with each other, folded into a superposed state, and then fixed in a series of movements. Since it shifts, folding operation becomes easy.

  Further, when the support shaft AX is lifted, the front wheel 24 is pulled rearward, but the handle 23 receives a force directed in a substantially straight direction by the trail effect due to the offset of the front fork.

FIG. 8 is a schematic diagram showing the mechanism of the fixing mechanism when folding the folding bicycle.
The first fixing member 25 is supported near the front end of the first frame FL1, and the second fixing member 35 is supported near the rear end of the second frame FL2, so that the distances to the respective support shafts 40 are substantially equal. It is placed at a distance. As a result, in the folding operation, the first fixing member 25 and the second fixing member 35 move on an arc having the same diameter centered on the support shaft 40. In other words, when the first frame FL1 and the second frame FL2 are folded, the trajectory of the movement of the first fixing member 25 and the second fixing member 35 is connected at a certain point, and fixed and detached at the time of connection. By this operation, the first fixing member 25 and the second fixing member 35, which are fixing mechanisms, move when the first frame FL1 and the second frame FL2 are folded. It will be fixed and detached along the trajectory.
Thus, since the 1st fixing member 25 and the 2nd fixing member 35 are guide | induced to the position which unites only by folding operation | movement, it can be said that folding workability | operativity is good.

9 is a perspective view showing a fixing start state of the folding mechanism of the folding bicycle, FIG. 10 is a perspective view of another viewpoint (however, components such as a hub are omitted), and FIG. 11 is a perspective view of the other viewpoint. It shows by.
12 to 15 are perspective views showing main components of the first fixing member, and FIGS. 16 to 20 are perspective views showing main components of the second fixing member.
The first fixing member 25 is formed as a part of a nut mechanism on the non-operation side of the so-called quick release front wheel axle, and has an engagement piece 25a having a rectangular cross section supported rotatably with respect to the nut. A knob portion 25b on the coaxial core formed so as to have a large diameter integrally with the engagement piece 25a and a base portion 25c serving as a nut are provided. Since the knob 25b is originally formed with a circular shape as a reference, the knob 25b is formed to have a large diameter with respect to the engagement piece 25a. It need only be made and need not be circular. Further, as shown in FIG. 23, which will be described later, the base portion 25c includes a nut-like portion 25c2 and a shaft-like portion 25c1, and the engaging piece 25a and the shaft of the knob portion 25b that are integral with the shaft-like portion 25c1. The hole 25a1 is penetrated, and the bolt 25d is screwed at the opening portion on the opposite side. The bolt 25d urges the nut-like portion of the base portion 25c through the washer 25e and the spring washer 25f while allowing the engaging piece 25a and the knob portion 25b to rotate. Since the base member 25c is fixed and stationary, the knob 25b and the engagement piece 25a can rotate, but the rotation angle position can be maintained unless a predetermined force is applied. With such a simple configuration, rotation is possible, but it does not rotate on its own, so when locking intentionally, it is easy to lock and can be unfolded by being pressed when folded. It can prevent turning to a position.
In the engagement piece 25a having a rectangular cross section, the length of the short side portion is W25sh, the length of the long side portion is W25lg, and the thickness is D25.

As shown in FIG. 16, one second fixing member 35 includes a front end portion 35 a that is a plate material that mainly forms a V-shaped opening, and a single piece that attaches the front end portion 35 a to the vicinity of the rear wheel axle. And a vehicle body mounting portion 35c which is a plate material. The V-shaped opening of the distal end portion 35a is a notch-shaped guide path, which is formed by a long piece 35a1 and a short piece 35a2, and is connected to the base portion 35a3. The long piece 35a1 and the short piece 35a2 protrude from the base portion 35a3, each of which corresponds to the protruding piece of the present invention, and both constitute a guide portion-side protruding piece.
The base 35a3 is connected to the bent piece 35a4 on the side opposite to the long piece 35a1 and the short piece 35a2. The V-shaped opening width formed by the long piece 35a1 and the short piece 35a2 is wide at the opening end side, becomes narrower toward the back side, and is substantially the above-described engaging piece 25a at the narrowest part. It is formed to have a width W25sh of the length in the short direction. Accordingly, the short side portion of the engagement piece 25a can pass through the guide route, but the long side portion longer than the short side portion cannot pass through the guide route. Moreover, since the opening end side is wide, it is easy to receive the engagement piece 25a, and it smoothly guides to the contact portion on the back side. In this sense, the tip portion 35a corresponds to a guide portion.
Further, on the back side where the long piece 35a1, the short piece 35a2 and the base portion 35a3 are connected, a concave portion 35b having a substantially circular shape having a diameter of the length W25lg of the long side portion of the engaging piece 25a is formed. ing. The long piece 35a1, the short piece 35a2, and the base portion 35a3 are screwed to the vehicle body attachment portion 35c via a bent piece 35a4, and are screwed and fixed to the vicinity of the rear wheel shaft of the rear wheel 34 via the vehicle body attachment portion 35c. In this screwed and fixed state, the long piece 35a1, the short piece 35a2, and the base 35a3 are oriented so as to be substantially parallel to the front wheel when folded. The front end portion 35a and the vehicle body attachment portion 35c each have a screw hole, but these have a long hole shape. For this reason, a fixed position can be displaced along a long hole direction. That is, the structure that is screwed through the elongated hole at the connection portion corresponds to an adjustment mechanism, and the engagement position described later can be displaced by this adjustment mechanism, in other words, the position of the tip can be adjusted. For example, if there are variations in the folding mechanism or the frame, the engagement position naturally changes slightly. Even in such a case, the shift can be absorbed by the adjusting mechanism. In addition, it is possible to adopt a quick release rear wheel axle for the rear wheel, and in this case, the vehicle body mounting portion 35c is sandwiched between the ends of the quick release rear wheel axle and fixed with screws. become.

The concave portion 35b has a shape in which the plate material is depressed and bent in the thickness direction (plate thickness direction) of the plate material in a direction approaching the front wheel 24 side when folded. In other words, the recess 35b is formed to be recessed in the direction from the knob 25b toward the engagement piece 25a. The recess 35b is generally circular, but has a shape interrupted at the opening formed by the long piece 35a1 and the short piece 35a2.
Further, the tip portions of the long piece 35a1 and the short piece 35a2 are opposite to the direction of the depression, that is, the axial direction of the rotation axis of the engaging piece 25a and the picking portion 25b is used as a reference. It is warped in the direction toward the side, and this warped part is called a bent part. As shown in FIG. 18, the depth from the tip of the bent portion to the bottom of the deepest portion of the recess 35b is set to a depth that substantially matches the thickness D25 of the engagement piece 25a described above. Because of such dimensions, the engagement piece 25a can enter into the opening formed by the long piece 35a1 and the short piece 35a2 in a direction parallel to the longitudinal direction, and is formed at the back. It is possible to enter the circular recess 35b. Moreover, since the diameter of the recessed part 35b is substantially corresponding to the length W25lg of the engagement piece 25a, it can also rotate. When the engagement piece 25a is rotated in the recess 35b, the projection length (width) of the engagement piece 25a toward the opening is larger than the width of the opening formed by the long piece 35a1 and the short piece 35a2. The engagement piece 25a is fixed in the recess 35b.
In the above description, the description of the knob portion 25b fixed coaxially with the engagement piece 25a is omitted, but the knob portion 25b warps the long piece 35a1 and the short piece 35a2 when the engagement piece 25a enters the opening. The engagement piece 25a is aligned in the axial direction so that the engagement piece 25a can enter the recess 35b by the tip. That is, the fact that the knob 25b exceeds the bent tip of the long piece 35a1 and the short piece 35a2 means that the depth from the tip to the deepest part of the recess 35b is D25. Even if it is D25 minutes, it is the range of the depth in the recessed part 35b, and it can avoid interfering with the thickness part of the board | plate material which forms the long piece 35a1 and the short piece 35a2. Strictly speaking, the warp heights of the long piece 35a1 and the short piece 35a2 are different from each other, so that the positioning can be performed in stages.

During the folding operation, the engagement piece 25a does not necessarily enter the opening formed by the long piece 35a1 and the short piece 35a2 in the long side direction. However, since the opening itself is substantially V-shaped, the width of the opening is wider on the opening side and becomes narrower toward the back.
Further, since the long piece 35a1 projects toward the opening axis rather than the short piece 35a2, that is, toward the moving locus drawn by the engaging piece 25a, the engaging piece 25a is temporarily moved from the short side. When not entering, the side surface of the long side of the engagement piece 25a hits the long piece 35a1 forming the opening, and the engagement piece 25a is rotated in the process of further entering, and the short side of the engagement piece 25a is naturally It will invade into the opening from the side. In other words, regardless of the rotation position of the engagement piece 25a, the engagement piece 25a is guided so as to enter the recess 35b at the back of the opening. That is, the engagement piece 25a constituting the lock portion rotates by contacting the protruding protrusion piece, so that the short side portion is positioned at a position where the engagement piece 25a can be inserted into the recess portion 35b. It becomes.

  By setting it as such a structure, the 1st fixing member 25 becomes an engaging part, and the 2nd fixing member 35 becomes an to-be-engaged part. Further, the opening formed by the long piece 35a1 and the short piece 35a2 is substantially V-shaped, and guides the engaging piece 25a to the back, so that the engaged portion guides the engaging portion to a predetermined position. It can be said that the guide portion is provided with a guide path that gradually decreases from a wide width along a trajectory along which the engaging portion moves. Since there is a guide portion along the folding locus, workability at the time of folding and fixing is good. For example, it is assumed that the front wheel side frame 21 and the rear wheel side frame 31 do not rotate according to the original trajectory during the folding operation, and the trajectory of the engagement piece 25a fixed near the front wheel shaft is slightly shifted. Even in such a case, since the opening side is wide, the engaging piece 25a is smoothly guided to the engaging position without hitting the protruding piece.

  When folding, the engagement piece 25a enters the opening formed by the long piece 35a1 and the short piece 35a2, but if the steering angle of the front wheel 24 is large, regardless of the rotational position of the engagement piece 25a, It is thought that it does not enter. That is, when the front wheel side frame 21 and the rear wheel side frame 31 are folded, the first fixing member 25 and the second fixing member 35 are folded in a state where the front wheel 24 is oriented substantially in the straight traveling direction. The second fixing member 35 is fixed and detached along the trajectory along which the second fixing member 35 moves. However, as described above, the front wheel 24 and the handle 23 are oriented in a substantially straight direction by the folding operation due to the shape of the front fork. Therefore, only the folding operation is substantially necessary, and the steering angle of the front wheel 24 is artificially adjusted. No adjustment is required.

As described above, when the folding bicycle is folded, the engaging piece 25a is guided into the recess 35b and is in a fixed state, but the fixing is not completed. In order to complete the fixing, the engagement piece 25a may be rotated within the recess 35b.
FIG. 21 is a side view showing a state where the fixing mechanism of the folding bicycle is fixed, FIG. 22 is a perspective view of another viewpoint, and FIG. 23 is a cross-sectional view. FIG. 24 is a perspective view of another viewpoint.

In any of the drawings, the knob 25b is rotated about 90 ° with the engagement piece 25a entering the recess 35b. As described above, when the engagement piece 25a rotates in the recess 35b, even if a force for releasing the folded state and unfolding is applied, the short side of the engagement piece 25a becomes the long piece 35a1. It does not coincide with the direction of the opening formed by the short piece 35a2, and cannot come out of the recess 35b. That is, the front wheel side frame 21 and the rear wheel side frame 31 are locked by the fixing mechanism.
In other words, at the engagement position where the engagement piece 25a is guided by the distal end portion 35a in the end portion on the far side of the guide path in the guide portion described above, the development in the front wheel side frame 21 and the rear wheel side frame 31 is performed. It can be said that a lock portion that restricts rotation in the direction is provided. And since there exists a lock part in such a position, it can fix in the state which contact | abutted to the edge part of the guide part at the time of folding, and positioning operation becomes unnecessary. In addition, such an operation of the lock portion itself is only to rotate the knob 25b at the fixed portion, and can be locked by an extremely simple operation.

  Since the end of the long piece 35a1 and the short piece 35a2 is warped, the thickness of the engaging piece 25a matches the depth to the deepest part of the concave portion 35b. Therefore, as shown in FIG. It is in a state where it floats by a floating allowance df from the plate surfaces of the long piece 35a1 and the short piece 35a2 around 35b. As a result, the operator of the folding bicycle can easily hold the knob portion 25b and can easily perform an operation for completing the fixing. As described above, each of the first fixing member 25 and the second fixing member 35 is fixed in the vicinity of the front wheel shaft and in the vicinity of the rear wheel shaft. The rotation can be restricted. And since it can roll smoothly in the state where rotation is regulated, the load to the fixing mechanism itself and the fluttering at the front wheel grounding portion are reduced, and it is possible to roll synergistically and stably.

  In addition, when performing expansion | deployment operation, the knob | pick part 25b is rotated. The knob portion 25b is not circular, but is formed by cutting the periphery along the long side direction of the engagement piece 25a. Thereby, if the knob | pick part 25b is observed, direction of the engagement piece 25a can be known, and the knob | pick part 25b is rotated so that the short side of the engagement piece 25a may be between the long piece 35a1 and the short piece 35a2. Then, the front wheel side frame 21 and the rear wheel side frame 31 can be rotated in the direction opposite to the folding operation around the support shaft 40, and the front wheel side frame can be rotated by the support mechanism of the support shaft in the vicinity of the support shaft 40 in the unfolded state. 21 and the rear wheel side frame 31 are fixed.

  Thus, the present folding bicycle is supported by the first fixing member 25 (engagement portion) supported by the front wheel side frame 21 that is the first movable part and the rear wheel side frame 31 that is the second movable part. The first fixing member 25 and the second fixing member 35 (engaged portion) that can be engaged with the first fixing member 25 are provided, and can be fixed in a folded state. Further, the engaged portion includes a guide portion (tip portion 35a) that guides the engaging portion to a predetermined engaging position in the process of folding operation, and the engagement portion that is guided by the engaging portion by the guide portion. At the joint position, there is provided a lock portion for restricting the rotation of the front wheel side frame 21 (first movable part) and the rear wheel side frame 31 (second movable part) in the deployment direction.

Needless to say, the present invention is not limited to the above embodiments. It goes without saying for those skilled in the art,
・ Applying mutually interchangeable members and configurations disclosed in the above embodiments by appropriately changing the combination thereof.− Although not disclosed in the above embodiments, it is a publicly known technique and the above embodiments. The members and configurations that can be mutually replaced with the members and configurations disclosed in the above are appropriately replaced, and the combination is changed and applied. It is an embodiment of the present invention that a person skilled in the art can appropriately replace the members and configurations that can be assumed as substitutes for the members and configurations disclosed in the above-described embodiments, and change the combinations and apply them. It is disclosed as.

DESCRIPTION OF SYMBOLS 10 ... Folding bicycle, 20 ... Front wheel side member, 21 ... Front wheel side frame, 22 ... Handle post, 23 ... Handle, 24 ... Front wheel, 25 ... First fixing member, 25a ... Engagement piece, 25b ... Pick part, 25c ... Base part, 25d ... Bolt, 25e ... Washer, 25f ... Spring washer, 30 ... Rear wheel side member, 31 ... Rear wheel side frame, 32 ... Seat post, 33 ... Saddle, 34 ... Rear wheel, 35 ... Second fixed 35a1 ... long piece, 35a2 ... short piece, 35a3 ... base, 35a4 ... bent piece, 35b ... recessed part, 35c ... body mounting part, 40 ... support shaft, 41 ... fixing mechanism, FL1 ... first frame , FL2 ... 2nd frame.

Claims (10)

  A foldable bicycle that can be folded and unfolded by a rotation operation, includes a fixing mechanism that is fixed in a folded state, and the fixing mechanism is supported by an engaging portion that is supported by a first movable portion and a second movable portion. And an engaged portion that can be engaged with the engaging portion, and the engaged portion includes a guide portion that guides the engaging portion to a predetermined engaging position in the process of folding, The engagement position at which the engagement portion is guided by the guide portion includes a lock portion that restricts the first movable portion and the second movable portion from rotating in the deployment direction. Folding bike. The engaged portion includes a notch-shaped guide path having a predetermined opening width formed by the guide part, and a fixed portion that is wider than the opening width at a closed end of the guide path,
The engaging portion forms a short side portion that is narrower than the opening width of the guide path and can pass through the guide route, and a long side portion that is wider than the opening width and cannot pass through the guide path. An engagement piece, a base portion fixed to the first movable portion side, and a knob fixed integrally with the engagement piece and rotatably supported with respect to the base portion. The foldable bicycle according to claim 1.   The engaged portion is formed by being divided into a plurality of members, one member is a vehicle body mounting portion that is fixed to the body of the folding bicycle, and the other member is a tip portion that forms the fixing portion. The foldable bicycle according to claim 2, wherein an adjustment mechanism capable of adjusting a position of the tip end portion is provided at a connecting portion that connects the vehicle body attachment portion and the tip end portion.   The said knob is formed so that it may spread rather than the said engagement piece, and it is urged | biased toward the said base part in the axial direction, and is pressed by the said base part which is still. Alternatively, the folding bicycle according to claim 3.   The foldable bicycle according to claim 4, wherein the base portion is a part of a nut mechanism on a non-operation side of the quick release front axle.   The guide part includes two projecting pieces, and includes a guide part-side projecting piece that forms the notch therebetween, and one projecting piece is directed toward the side of the movement locus drawn by the engaging piece. The foldable bicycle according to any one of claims 2 to 5, wherein the foldable bicycle projects longer than the projecting piece.   The engaged portion is formed of a plate material, and a substantially circular concave portion that substantially matches the length of the long side portion is formed by recessing a portion at the end of the notch in the plate thickness direction. The foldable bicycle according to any one of claims 2 to 6.   The foldable bicycle according to claim 7, wherein the recess is formed to be recessed from the knob in a direction toward the engagement piece.   The protruding piece has a bent portion so that a tip portion of the protruding piece warps in a direction from the engaging piece toward the knob with respect to an axial direction of the engaging piece and the rotation shaft of the knob. The foldable bicycle according to claim 8, wherein there is a folding bicycle.   The foldable bicycle according to claim 9, wherein a depth from a tip of the bent portion to a bottom of the concave portion substantially matches a thickness of the engagement piece.

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