JP6469452B2 - Bicycle stand - Google Patents

Description

  The present invention provides a lock piece spring that pivotally supports the vicinity of the upper end portion of the lock piece in the vicinity of the upper end portion of the leg member pivotally supported on the stand mounting plate and biases the stand mounting plate and the lock piece in the pulling direction. The bicycle is configured such that the extending direction line of the lock piece spring exceeds the dead center of the leg member and the shaft support portion of the lock piece between the jumping position and the standing position of the leg member. Regarding the stand.

  Conventionally, a bicycle is erected by a leg member that is pivotally supported via a stand mounting plate that is attached to a pivotal support portion of the rear wheel of the bicycle. The upper end of the lock piece is located near the upper end of the leg member pivotally supported on the stand mounting plate so that the leg member does not move to the jumping position, which is the running position, when the stand is stopped. The stand mounting plate and the lock piece are connected by a lock piece spring that biases the stand mounting plate and the lock piece in the pulling direction, and the lock piece spring is stretched between the jumping position and the standing position of the leg member. The direction line is configured to exceed the dead center of the leg member and the shaft support portion of the lock piece.

  By being configured in this way, it is possible to prevent the leg member from moving to the jumping position which is the traveling position when standing up and stopping. In order to jump the leg member from the standing position to the running position, the lock piece is kicked upward with a foot or the like so that the extending direction line of the lock piece spring exceeds the dead point of the shaft support portion of the lock piece. The spring is urged in the jumping direction, which is the running position, and the leg member rotates backward by the forward movement of the bicycle, and the extending direction line of the lock piece spring also exceeds the dead point of the shaft support portion of the leg member. The leg member is also automatically jumped up. On the contrary, when the leg member moves from the jumping position to the standing position when stopped from running, the tension direction line of the locking piece spring is automatically moved by the movement of the leg member only in the standing direction. Since the dead center of the pivotal support portion of the leg member is exceeded, the lock can be performed without any operation of the lock piece, and the standing position of the leg member is securely held.

  On the other hand, due to road surface unevenness, etc. during bicycle travel, there is a risk that the leg member flutters due to the lock piece spring at the jumping position and the return spring of the leg member, so-called drooping of the leg member occurs. It was. Or there was a possibility that the leg member may hang down due to the cutting of the spring. In view of this, various techniques for preventing the leg members from sagging during traveling have been proposed, which eliminates the possibility of the leg members sagging. The first prior art disclosed in Japanese Utility Model Laid-Open No. 53-64451, in which a resilient member for urging the leg member in the direction of the jumping position is disposed on the shaft support portion of the leg member, holds the leg member in the jumping position. The second conventional example disclosed in Japanese Utility Model Publication No. 57-27668 in which a hook lever is separately installed, a holding portion such as a stopper which can hold the jumping position of the leg member between the lock piece and the stand mounting plate A third conventional example disclosed in Japanese Utility Model Laid-Open No. 63-30285 has been proposed.

Furthermore, in power-assisted bicycles that have been frequently used in recent years, a power supply device such as a battery is disposed between the seat frame and the rear wheel, so that a device that does not increase the overall length of the bicycle is also required. ing. In view of this, it is considered that the full length of the traveling bicycle is not increased by a slight amount by configuring the leg member to be raised relative to the stand mounting plate slightly below the horizontal. As such a thing, there is a bicycle stand as a fourth conventional example as described in Patent Document 1 below.

A bicycle stand as a fourth conventional example described in Patent Document 1 described below will be described with reference to FIG. 3. As shown in FIG. 3A, the bicycle stand is attached to the mounting body 105 attached to the shaft support portion of the rear wheel of the bicycle. The upper end portion of the leg member 110 is pivotally supported by the shaft support portion 111, and a lock piece 113 is pivotally supported by the shaft support portion 114 in the vicinity of the upper end portion of the leg member 110. A tension spring 116 is stretched between the spring stop portion 117 of the piece 113. On the other hand, a cam surface 126 is formed at the lower rear side of the attachment body 105 and is installed at the upper rear side of the lock piece 113 between the standing position of the leg member 110 and the jumping position as the traveling position. A roller-like contact member 132 is guided by being brought into contact with the cam surface 126. As shown in FIG. 3B, the roller-shaped contact member 132 has a diameter in order to prevent the interval between the support pieces 130 and 131 in the U-shaped lock piece 113 from expanding unexpectedly. A large portion 132a is formed.

The shape of the cam surface 126 is such that the roller-shaped contact member 132 guided and moved thereon moves the tension axis of the tension spring 116 when the leg member 110 moves from the raised position to the standing position. 116a is configured to be able to exceed the dead point of the pivot point 114C, which is the pivotal support 114 of the leg member 110 in the lock piece 113. Moreover, in what was disclosed by this prior art example 4, as shown in FIG. 8 (illustration omitted), it is comprised so that the jumping position of the leg member 110 with respect to the stand attachment body 105 may become a little downward from the horizontal. .

Japanese Patent No. 2745011

In such a conventional bicycle stand, a first conventional art disclosed in Japanese Utility Model Laid-Open No. 53-64451, in which an elastic member for urging the leg member in the direction of the jumping position is disposed on the shaft support portion of the leg member. In the example, adjustment between the main stand spring and the elastic member and selection thereof were troublesome. Further, in the second conventional example disclosed in Japanese Utility Model Publication No. 57-27668 in which a hook lever for holding the leg member in the jumping position is separately provided, an extra part such as a hook lever is required. Complicated. Further, in the third conventional example disclosed in Japanese Utility Model Laid-Open No. 63-30285, in which a holding portion such as a stopper capable of holding the jumping position of the leg member is formed between the lock piece and the stand mounting plate, Processing is troublesome, such as forming a holding part such as a receiving piece or stopper that can hold the jumping position of the leg member formed on the mounting plate, and in addition, the locking piece and the holding part such as a stopper on the stand mounting plate There was a fear that the contact could not be made smoothly.

Further, in the fourth conventional example illustrated and described, the shape of the cam surface 126 is such that the roller-shaped contact member 132 guided and moved thereon is moved from the jumping position of the leg member 110. When moving to the standing position, the tension axis 116a of the tension spring 116 is configured to be able to exceed the dead point of the pivot point 114c which is the shaft support 114 of the leg member 110 in the lock piece 113, The relationship between the cam surface that regulates the behavior of the tension axis 116 a in the tension spring 116 and the roller-like contact member 132 is specified, and the inclination of the cam surface 126 is relative to the shaft support 111 of the leg member 110. It is sloping with a gentle curve. Therefore, when the structure having such a structure is applied to a structure in which the jumping position of the leg member 110 with respect to the stand attachment body 105 as shown in FIG. The tension holding force at the jumping position, which is the travel position, is slightly reduced. In addition, as described above, the upper portion of the cam surface 126 is inclined, and the force to the standing position of the leg member 110 can be reduced. However, the leg member is liable to hang down due to vibration during traveling. Therefore, it is necessary to increase the spring force of the tension spring 116 or the restoring spring of the leg member, which may increase the load on the spring and the components.

Therefore, the present invention solves the problems of the conventional bicycle stand and combines a simple structure without requiring a complicated structure and adjustment and a large spring force, and thus a burden on a component having excellent durability. An object is to provide a bicycle stand that can be reduced.

For this reason, the present invention pivotally supports the vicinity of the upper end of the lock piece in the vicinity of the upper end of the leg member having the upper end as a pivot on the stand mounting plate, and biases the stand mounting plate and the lock piece in the pulling direction. The lock piece spring is connected, and the extending direction line of the lock piece spring exceeds the dead center of the leg member and the shaft support portion of the lock piece between the jumping position and the standing position of the leg member. In the bicycle stand, a cam surface on which the locking portion formed on the lock piece is locked is formed on the stand mounting plate, and the stand mounting plate is engaged with the lock piece so as to keep the stand jumping position. A cam surface that is configured to hold a stopper, and to which the locking portion comes into contact when the cam surface forming direction of the stand mounting plate is moved to an upright position with respect to the shaft support (leg shaft support) of the leg member. Legs Characterized by being formed on a straight line passing through the branch. Further, the present invention is characterized in that a concave surface portion is formed on the cam surface when the cam surface of the stand mounting plate comes into contact with the engaging portion, which is a direction of jumping up from a straight line passing through the leg shaft support portion . Further, the present invention provides an abutting portion in which the engaging portion of the lock piece directly or slightly moves and engages and engages at an end of the cam surface, and the jumping position of the leg member is set horizontally. It is characterized by being configured to be slightly lower. According to the present invention, the locking portion of the lock piece is constituted by a rotatable roller. The present invention is characterized in that a roller is disposed on the cam surface side of the stand mounting plate with respect to the locking portion of the lock piece, and these are means for solving the problems.

According to the present invention, the stand mounting plate according to claim 1, wherein the stand mounting plate is pivotally supported in the vicinity of the upper end portion of the lock piece in the vicinity of the upper end portion of the leg member having the upper end portion pivoted on the stand mounting plate. And the lock piece are connected by a lock piece spring that urges the lock piece in the pulling direction, and the extending direction line of the lock piece spring is between the leg member's jumping position and the standing position. In the bicycle stand configured to exceed the dead point of the support portion, a cam surface on which the locking portion formed on the lock piece is locked is formed on the stand mounting plate, and the stand jumping position is maintained. Accordingly, the stand mounting plate is configured to hold the locking portion of the lock piece, and the cam surface forming direction of the stand mounting plate is set to the upright position with respect to the shaft support portion (leg shaft support portion) of the leg member. Move The cam surface of the locking portion is in contact is formed on a straight line passing through the trunnion branches in time, of requiring a less complex structure and adjustment of the locking portion of the substantially linear shape and the locking piece of the cam surface Since there is no locking, a reliable and relatively large holding force can be obtained, so that the spring force of the lock piece spring or the like can be reduced by that amount, and the load on the spring itself and other structural parts can be reduced. A bicycle stand that can be suppressed and has excellent durability can be provided. In addition, since the locking portion of the lock piece that rides in the substantially linear formation direction of the cam surface can sufficiently and efficiently receive the reaction force from the cam surface at the time of jumping, the leg member Therefore, the behavior of the leg member extending in the linear direction passing through the shaft support portion in the standing direction can be effectively suppressed.

Further, according to a Kose requirement according to claim 2, wherein the stand mounting plate concave portion Ru direction der increasing recoil than a straight line passing through the leg shaft support on the cam surface when the cam surface and the locking portion are in contact with the In this case, the locking portion of the lock piece locked to the cam surface is more difficult to move by the concave surface portion, and the spring force of the lock piece spring or the like can be reduced.

Furthermore, the configuration requirement according to claim 3 , forming an abutting portion in which the engaging portion of the lock piece is directly or slightly moved and engaged with the end portion of the cam surface. When the leg member is flipped up slightly below the horizontal position, the spring such as the lock piece spring can be made smaller to reduce the load on the spring itself and other components, resulting in excellent durability. In the bicycle, the total length of the bicycle traveling at the jumping position, which is the traveling position of the leg member, can be slightly shortened, and the leg member can be securely held. Further, when the moving part is provided, the degree of freedom in design by moving the locking part is improved. Is a constituent of claim 4, when form Ri構 by the rotatable roller the locking portion of the lock piece, similarly as described above, to reduce the spring force, such as a locking piece spring In a bicycle that can reduce the load on the spring itself and other structural parts, and can suppress the detachment of the locking portion leg member and has excellent durability, the locking portion of the locking piece can be lifted onto the cam surface of the stand mounting plate. In addition, the cam surface has a smooth movement, and the cam surface that is configured almost linearly requires a holding release force with a large force in the upright direction of the lock piece at the time of initial movement. When the holding release is started, the locking portion of the lock piece is constituted by a rotatable roller, so that the lock piece can be smoothly moved and is light.

Furthermore, when a roller is disposed on the cam surface side of the stand mounting plate with respect to the locking portion of the lock piece, which is a constituent requirement according to claim 5 , a roller that enables smooth behavior is provided. Since it is arranged on the stand mounting plate side that is the fixed side, it is only necessary to form the locking part side of the lock piece on a substantially straight cam surface, and the structure on the lock side that is the moving side is simplified and designed The degree of freedom increases. For example, by replacing the cam surface of the stand mounting plate and the locking portion of the lock piece. Furthermore, when the roller diameter of the lock piece is configured to be substantially equal to the length of the cam surface of the stand mounting plate, and the jumping position of the leg member is configured to be slightly below the horizontal, The length of the roller in the lock piece relative to the cam surface of the stand mounting plate can be almost eliminated, and the unnecessary movement of the lock piece to make the jumping position of the leg member slightly below the horizontal is eliminated. it can.

Further, when the electric assist bicycle having the bicycle stand described above is characterized in that the jumping position of the leg member with respect to the stand mounting plate is slightly below the horizontal, particularly when traveling. Even in electrically assisted bicycles that tend to be long, the leg member's jumping position with respect to the stand mounting plate is configured to be slightly below the horizontal position, so that the total length during travel can be reduced. By reducing the spring force of the single spring or the like, the burden on the spring itself and other structural parts can be reduced, and the detachment of the leg member can be suppressed, and an electrically assisted bicycle stand having excellent durability can be provided.

It is the whole side view at the time of jumping running of the bicycle stand of the present invention, the principal part expansion side view which showed the lock piece with the chain line, and the whole perspective view. It is the whole side view at the time of standing up of a bicycle stand, the principal part expansion side view, and the whole perspective view. It is explanatory drawing of the stand of the bicycle of the 4th prior art example.

Hereinafter, a bicycle stand according to the present invention will be described with reference to the drawings. As shown in FIG. 1, the bicycle stand of the present invention has a shaft support 5 in the vicinity of the upper end portion of the lock piece 3 in the vicinity of the upper end portion of the leg member 2 having the upper end portion as a shaft support 4 on the stand mounting plate 1. The stand mounting plate 1 and the lock piece 3 are connected by a lock piece spring 12 (dotted line) that urges the stand in the pulling direction, and the lock piece is placed between the jumping position and the standing position (FIG. 2) of the leg member 2. a bicycle stand configured to stretched direction line of the spring 12 to perform beyond dead center of the shaft support 4 and 5 of the leg members 2 and the locking piece 3, to hold the drive-up position of the stand, the lock piece 3 is formed on the stand mounting plate 1, and the stand mounting plate 1 is used to hold the locking portion 7 of the lock piece 3. with a configuration that holds the scan When the cam surface 6 is formed on the tanddle mounting plate 1 in the upright position with respect to the shaft support portion (leg shaft support portion) 4 of the leg member, the cam surface 6 with which the locking portion 7 comes into contact with the leg shaft support portion 4. It is formed on a straight line passing through .

1 and 2 show a first embodiment of the bicycle stand of the present invention at the time of running up (during running) and at the time of standing up (during stopping). The bicycle stand shown in FIGS. 1 and 2 is a double-leg stand, but it goes without saying that the bicycle stand can be applied to a single-leg stand such as a light vehicle. In the illustrated embodiment, since it is a double leg type, the lock piece 3 is disposed on the leg member side on the left side of the vehicle body, and the restoring spring 13 of the leg member 2 is disposed on the leg member side on the right side of the vehicle body. . In FIG. 1 (A) (B) ( C), restoring spring 13 of the leg member is indicated by the solid line, the locking piece a spring 12 disposed on the left side of the vehicle body is shown in dashed lines are not shown . When the bicycle stand of the present invention is applied to a single leg type stand, the leg member restoring spring 13 is omitted, or another type of leg member restoring spring that does not interfere with the lock piece spring is provided. It can also be configured as follows.

As shown in FIG. 2, the mounting hole 8 at the upper end is attached to the center of the stand mounting plate 1 attached to the hub axle or the like of the rear wheel of the bicycle, and the upper end of the leg member 2 is pivotally supported as the pivot support 4. A lock piece 3 is pivotally supported in the vicinity of the upper end portion of the leg member 2 to form a pivot support portion 5. Between the spring mounting portion 9 formed by folding a part of the upper portion of the stand mounting plate 1 and the spring mounting portion 11 formed by folding the vicinity of the lower end of the lock piece 3, the stand mounting plate 1 and the lock piece 3 are provided. Are connected by a lock piece spring 12 that is urged in the pulling direction, and the tension direction line of the lock piece spring 12 is between the jumping position (FIG. 1) and the standing position (FIG. 2) of the leg member 2. Is configured so as to exceed the dead center of the shaft members 4 and 5 of the leg member 2 and the lock piece 3.

Since it is comprised in this way, at the time of standing-up stop, it is prevented that the said leg member 2 moves to the jumping-up position which is a driving | running | working position unreasonably. In order to move the leg member 2 from the stop standing position of FIG. 2 to the traveling jumping position of FIG. 1, the lock piece 3 and the leg member 2 urged to the standing position by the lock piece spring 12 due to exceeding the dead point are 3 is kicked with a foot or the like against the restoring force of the lock piece spring 12, and the lock piece 3 is rotated counterclockwise from the state of FIG. When the dead center of the shaft support portion 5 of the lock piece 3 is exceeded, a biasing force in the kicking direction is applied to the lock piece 3, and the leg member 2 is rotated backward by the forward movement of the bicycle. The dead point of the extending direction line of the restoring spring 13 of the leg member 2 is also exceeded, and the leg member 2 is automatically jumped up.

Conversely, in order to move the leg member 2 from the jumping position in FIG. 1 to the standing stop position in FIG. 2, only the leg member 2 is grounded from the jumping position in FIG. Then, as well understood in FIG. 1 (B), first, the extending direction line of the lock piece spring 12 exceeds the lock piece shaft support portion 5 so that the dead point is automatically exceeded first. 3 is urged in the standing direction, and then the extending direction line of the leg member restoring spring 13 exceeds the dead center exceeding the shaft support portion 4 to urge the leg member 2 in the standing direction. To. Therefore, in order to move the leg member 2 from the jumping position to the standing stop position, it is only necessary to perform the standing operation of only the leg member 2 without operating the lock piece 3.

In the bicycle stand constructed as described above, as shown in an enlarged view in FIG. 1B, a cam surface 6 on which the locking portion 7 formed on the lock piece 3 is locked is formed on the stand mounting plate 1. At the same time, the cam surface 6 is substantially linear. Thereby, by the latch which does not require a very complicated structure and adjustment with the linear shape of the cam surface 6 and the latching | locking part 7 of the lock piece 3, it is effective in resisting the standing direction of the leg member 2 Since a reliable and relatively large holding force can be obtained, the spring force of the lock piece spring 12 or the like can be reduced by that amount, and the load on the spring itself and other structural parts can be reduced. An excellent bicycle stand can be provided.

Further, by forming the cam surface 6 in the stand mounting plate 1 in a straight line with respect to the shaft support 4 of the leg member 2, the cam surface 6 is formed in a substantially linear direction when the cam surface 6 is lifted up. Since the latching portion 7 of the lock piece 3 that has ridden can receive the reaction force from the cam surface 6 substantially efficiently at a substantially right angle, it is normal to the shaft support portion 4 of the leg member 2. It is possible to effectively suppress the behavior of the extending leg member 2 in the standing direction. Further, the cam surface 6 of the stand mounting plate 1 has a concave surface portion (for example, the entire cam surface is formed in a concave curved shape or a triangular groove portion having a moderation feeling is engraved in the middle of the cam surface). When formed, the locking portion 7 of the lock piece 3 locked to the cam surface 6 is more difficult to move by the concave surface portion, and is higher in the releasing force of the lock piece 3, that is, in the standing direction of the leg member 2. Since a holding release force is required, the spring force of the lock piece spring 12 and the like can be further reduced accordingly. In addition, the concave surface can make the angle of the front end portion of the cam portion steep or larger than the jumping direction.

Still further, when an abutting portion 10 is formed at the end of the cam surface 6 where the engaging portion 7 of the lock piece 3 engages and abuts, the leg member 2 is surely positioned slightly below the horizontal position. In such a case, the spring force of the lock piece spring 12 or the like can be reduced to reduce the load on the spring itself and other structural parts, and in a bicycle having excellent durability, the jumping of the leg member 2 can be performed. The total length of the bicycle in the raised position can be shortened slightly, and the leg member can be securely held. In addition, by configuring the locking portion 7 of the lock piece 3 with a rotatable roller, the spring force of the lock piece spring 12 and the like is similarly reduced as described above, so that the spring itself and other structural parts can be reduced. In a bicycle that can reduce the load and has excellent durability, the locking portion 7 of the lock piece 3 can be easily lifted onto the cam surface 6 of the stand mounting plate 1 and behaves on the cam surface 6 so that it is substantially linear. Although the cam surface 6 requires a holding release force with a large force in the standing direction of the lock piece 3 at the initial movement, once the holding release of the lock piece 3 in the standing direction starts, the engagement in the lock piece 3 is started. Since the stopper 7 is composed of a rotatable roller, the lock piece 3 can be moved smoothly and lightly.

Further, when a roller is disposed on the cam surface 6 side of the stand mounting plate 1 with respect to the locking portion 7 of the lock piece 3, the stand mounting plate is a fixed side roller that enables smooth behavior. Therefore, it is only necessary to form the locking portion 7 side of the lock piece 3 on a substantially linear cam surface, and the structure on the side of the lock piece 3 that is the moving side is simplified. Furthermore, with respect to the length of the cam surface 6 in the stand mounting plate 1, the diameter of the roller 7 in the lock piece 3 is configured to be substantially equal, and the jumping position of the leg member 2 is slightly below the horizontal. In this case, the length of the roller 7 in the lock piece 3 with respect to the cam surface 6 in the stand mounting plate 1 can be almost eliminated, and the jumping position of the leg member 2 is slightly below the horizontal. The useless movement of the lock piece 3 for the purpose can be eliminated.

In addition, in the electrically assisted bicycle provided with the above-described bicycle stand configured such that the jumping position of the leg member 2 with respect to the stand mounting plate 1 is slightly below the horizontal, the total length during traveling is particularly large. Even in an electrically assisted bicycle that tends to be long, the leg piece 2 is configured so that the jumping position of the leg member 2 with respect to the stand mounting plate 1 is slightly below the horizontal, so that the total length during travel is suppressed. By reducing the spring force of the spring 12 or the like, the load on the spring itself and other structural parts can be reduced, and the electrically assisted bicycle stand with excellent durability in which the reluctance of the leg member 2 is suppressed can be provided.

The embodiment of the present invention has been described above, but within the scope of the present invention, the shape and type of the stand mounting plate (in the case of the double-leg type of the embodiment, a pair of left and right stand mounting plates are provided. In the case of a single leg type, it is considered as one stand mounting plate), the shape of the leg member (the shape of the grounding part, the shape of the front view of the gate type, etc.), the type (both leg type or single leg type), Adopting the leg member shaft support form, the lock piece shaft support form to the leg member, the shape and type of the locking part of the lock piece (especially when using a roller, a drum type roller such as the diameter of the central part is adopted) The shape of the roller, the size of the roller with respect to the cam surface, the shaft support to the lock piece and its material, etc.) The shape of the stand mounting plate or lock piece (the roller-shaped locking part is installed on the stand mounting plate side) If this is the case, Concave surface shape (such as making the entire cam surface concavely curved, or forming a triangular groove in the middle of the cam surface, etc.) and the shape of the contact portion (the edge of the stand mounting plate) However, the cam surface can be configured to be almost straight and stop. And the locking portion may be configured to have a shape that can appropriately impart a high resistance force in the standing direction of the leg member, and the locking portion in the lock piece may be formed in a straight line similar to the straight line of the cam surface. Further, a locking portion or a roller that matches or does not match the curvature of the concave surface portion such as a concave curved shape of the cam surface may be used, or a protrusion or the like corresponding to a triangular groove may be formed. Further, the gist of the constituent requirement in claim 6 is that the formation forms of the cam surface of the stand mounting plate and the engaging portion of the lock piece may be reversed, that is, replaced. Accordingly, it is also within the scope of the present invention that a concave surface portion or the like is provided on the lock piece side, and a locking portion made of a roller or the like corresponding thereto is formed on the stand mounting plate side. Further, the shape and type of the electrically assisted bicycle including the bicycle stand configured so that the jumping position of the leg member with respect to the stand mounting plate is slightly below the horizontal can be selected as appropriate. The specifications described in the embodiments described above are merely examples in all respects and should not be interpreted in a limited manner.

The bicycle stand of the present invention is particularly useful when applied to a power-assisted bicycle. However, the bicycle stand can also be applied to a light bicycle having a one-leg stand from a bicycle having a normal two-leg stand. It can also be applied to a stand such as a vehicle.

DESCRIPTION OF SYMBOLS 1 Stand mounting plate 2 Leg member 3 Lock piece 4 Leg axis support part 5 Lock piece axis support part 6 Cam surface 7 Lock piece latching part (roller member)
8 Mounting hole 9 Spring mounting portion 10 Contact portion 11 Spring mounting portion 12 Lock piece spring 13 Leg member restoring spring

Claims (5)

The stand mounting plate is pivotally supported in the vicinity of the upper end of the lock piece in the vicinity of the upper end of the leg member pivoted at the upper end, and the stand mounting plate and the lock piece are connected by a lock piece spring that urges in the pulling direction. In addition, in the bicycle stand configured such that the extending direction line of the lock piece spring exceeds the dead center of the shaft member of the leg member and the lock piece between the jumping position and the standing position of the leg member, A structure in which a cam surface on which the locking portion formed on the locking piece is locked is formed on the stand mounting plate, and the stand mounting plate holds the locking portion of the locking piece so as to hold the stand jumping position. In addition, the cam surface with which the locking portion comes into contact with the shaft support portion (leg shaft support portion) of the leg member when the cam surface formation direction of the stand member plate is moved to the upright position passes through the leg shaft support portion. On a straight line Bicycle stand, characterized in that the formed. Bicycle according to claim 1, characterized in that the formation of the concave portion is a direction for increasing recoil than a straight line passing through the leg shaft support on the cam surface when the cam surface and the locking portion are in contact in the stand attachment plate Stand. At the end of the cam surface, a locking part of the locking piece is formed directly or slightly moving to lock and come into contact, so that the jumping position of the leg member is slightly below the horizontal. The bicycle stand according to claim 1 or 2 , wherein the bicycle stand is configured as described above. The bicycle stand according to any one of claims 1 to 3 , wherein the locking portion of the lock piece is constituted by a rotatable roller. The bicycle stand according to any one of claims 1 to 3 , wherein a roller is disposed on the cam surface side of the stand mounting plate with respect to the locking portion of the lock piece.

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