JP7574262B2 - Bottom bracket for attaching a bicycle front basket - Google Patents

Description

The present invention relates to a base for attaching a bicycle front basket to a bicycle basket stay.

As described in Patent Document 1, most conventional bicycle front basket mounting hardware has a front basket support plate attached to a basket stay to support the front basket from below. Many of these bicycle front basket mounting hardware are designed to be easy to attach and remove, or to be repurposed as a basket or case for other purposes, but there are few that are designed to be easy to attach. In particular, the bottom member of the front basket is generally bolted to the plate, which requires a certain amount of work to attach.

Registered Utility Model No. 3043158

In recent years, bicycles are mainly manufactured overseas and imported in large quantities in containers. In order to fit as many bicycles as possible into a given space, the bicycles are imported without their front baskets. As a result, after importation, the front baskets had to be bolted to the bottom parts of the front baskets one by one, which was extremely inefficient.

Therefore, there was a demand for a base fixture and method for attaching a front basket that would enable the front basket to be attached to the basket stays with a single touch, greatly improving work efficiency.

The base member for attaching a bicycle front basket of the present invention is attached to the bottom of the bicycle front basket and is attached to a basket stay having a rod-shaped engaged portion extending in the width direction, and comprises two engaging portions that protrude in opposing directions to engage the rod-shaped engaged portions at an engaged position, and a temporary placement portion disposed between the two engaging portions for temporarily placing the engaged portions, the temporary placement portion being oriented in a direction that intersects with the engaging direction of the basket stay at the engaged position by the two engaging portions. The two locking portions have a first locking portion that bulges downward from the bottom plate body to form a locking groove into which the locked portion can be inserted and has a locking claw on its underside that protrudes from rear to front, and a second locking portion that bulges downward from the bottom plate body to form a locking groove into which the locked portion can be inserted and has a locking claw that protrudes from front to rear, and is characterized in that a temporary placement surface is formed on the bottom plate body between the two locking portions, facing diagonally from the locking direction for locking at the locking position .

In addition, it is preferable that the two locking portions have upward protrusions formed along the tip edges of the locking claws, and that the protrusions have cutouts formed on the temporary placement surface side.

It is also preferable that the temporary placement surface has an open section in front of the first engagement section and an open section behind the second engagement section, and that an inclined wall is formed on both sides of the temporary placement surface.

The basket stay with the engaging portion has two legs that hang down from both ends and are bolted to the axle of the front wheel of the bicycle at the lower end, and the two engaging portions are preferably arranged so that the first engaging portion with an engaging claw that protrudes from the rear to the front is on the left side of the bicycle basket, and the second engaging portion with an engaging claw that protrudes from the front to the rear is on the right side of the bicycle basket.

It is also preferable that the bottom plate body has a locking spring portion formed between the temporary placement surface and the locking positions of the two locking portions, which can be protruded and retracted from the bottom plate body.

It is also preferable that the first and second locking sections have an unlocking section formed by cutting out the edges thereof, and that inclined walls are formed on both sides of the temporary placement surface.

The basket stay with the engaging portion has two legs that hang down from both ends and are bolted to the axle of the front wheel of the bicycle at the lower end, and the two engaging portions are preferably arranged so that the first engaging portion with an engaging claw that protrudes from the rear to the front is on the left side of the bicycle basket, and the second engaging portion with an engaging claw that protrudes from the front to the rear is on the right side of the bicycle basket.

Furthermore, there is a method for attaching a front basket to a basket stay having a rod-shaped engaged portion extending in the width direction, using a front basket attachment base device attached to the bottom of the front basket of a bicycle, the front basket attachment base device having two engaging portions that protrude in opposite directions to engage the rod-shaped engaged portion in an engaging position, and a temporary placement portion arranged between the two engaging portions for temporarily placing the engaged portion, the temporary placement portion having a temporary placement direction that intersects with the engaging direction of the basket stay at the engaging position by the two engaging portions, and the method is characterized in that it comprises a temporary placement step of twisting the front basket of the bicycle horizontally to place it so that the temporary placement direction of the temporary placement portion is aligned with the longitudinal direction of the rod-shaped engaged portion, and a locking step of twisting the front basket of the bicycle from the state of the temporary placement step to lock the rod-shaped engaged portion to the two locking portions.

According to the invention described in claim 1, while the front basket of the bicycle was conventionally fixed with screws or the like, the basket can be attached to the stay by placing the basket stay on the temporary storage area and twisting the basket, making it possible to attach it with one touch. Also, when importing and transporting a large number of bicycles and front baskets, it is common to import and transport the front basket with the base attached separately from the bicycle due to space issues, but by using this base, it is possible to quickly attach a large number of bicycles. Also, since it is made up of two locking parts with locking claws facing front and rear in the same horizontal direction, it is a compact base, which does not get in the way during import and transportation and makes it possible to save space.

According to the invention described in claim 2 , a protrusion is formed only on the tip of the locking claw, not only does it make it difficult for the locked part to come loose once inserted into the locking position, but it also means that the locked part that is twisted in from the temporary placement part is inserted from an oblique direction of the protrusion, making it possible to prevent the protrusion from getting caught during insertion.

According to the invention described in claim 3 , an open portion is formed in front of the first locking portion and behind the second locking portion, and even the bottom plate body is not formed, so that the locked portion can be easily seen when placed on the temporary placement surface. Furthermore, the inclined walls formed on both sides of the temporary placement surface act as guides when placing the locked portion on the temporary placement surface, making placement easier and thus significantly improving work efficiency.

According to the invention described in claim 4 , when the stay for a front basket of a bicycle is fitted onto the axle of the front wheel and secured with a bolt or the like, the bolt is tightened clockwise, so that the left side of the basket stay is subjected to a force moving backward and the right side to the front. Therefore, by designing the locking claw on the right side to face from the front to the rear and the left side to face from the rear to the front, the locked portion is positioned so that it is difficult for it to come off accidentally when the bicycle is in use.

According to the invention described in claim 5 , a spring portion is formed between the temporary placement surface and the two locking positions, so that not only does it make it difficult for the locked portion to come off once inserted into the locking position, but also the spring portion does not hinder the temporary placement state of the temporary placement surface, and the spring portion activates when moving from the temporary placement state to the locking state, making the temporary placement step and the locking step clear, thereby enabling a clearer locking operation to be achieved.

According to the invention described in claim 6 , the lock release portion is formed in front of the first lock portion and at the edge of the second lock portion, which makes it easy to see when placing the locked part on the temporary placement surface. Furthermore, the inclined walls formed on both sides of the temporary placement surface act as guides when placing the locked part on the temporary placement surface, making placement easier and thus significantly improving work efficiency.

According to the invention described in claim 7 , when the stay for a front basket of a bicycle is fitted onto the axle of the front wheel and secured with a bolt or the like, the bolt is tightened clockwise, so that the left side of the basket stay is subjected to a force moving backward and the right side to the front. Therefore, by designing the locking claw on the right side to face from the front to the rear and the left side to face from the rear to the front, the locked portion is positioned so that it is difficult for it to come off accidentally when the bicycle is in use.

According to the invention described in claim 8 , the front basket can be attached to the bicycle stays in a simple manner by twisting the front basket so that the engaged portion is aligned with the temporary placement direction of the bottom part attached to the front basket, and then twisting it back.

FIG. 2 is an exploded perspective view of the base member of the first embodiment with the front side facing upward. 1 is a perspective view showing an example of a locked state in which the front side of the base fitting of the first embodiment is facing upward and the locked portion is locked. FIG. FIG. 2 is a front view of the base member with the cover removed according to the first embodiment. 1A and 1B are side views of the base member with the cover removed according to the first embodiment, where FIG. 1A and 1B are a plan view and a bottom view, respectively, of a base fixture of the first embodiment with the cover removed. 1 is a perspective view from below showing the state in which the base fixture of the first embodiment is used and the engaged portion is placed on the temporary placement portion. FIG. 7 is a perspective view showing an example of a locked state in which the basket is twisted back from the state shown in FIG. 6 to lock the locked portion with the locking portion. FIG. FIG. 2 is a partial right side view of a bicycle equipped with the base member of the first embodiment. FIG. 1 is a partial left side view of a bicycle equipped with a base member according to a first embodiment. FIG. 11 is a perspective view of the base member of the second embodiment with the front side facing upward. 13A is a front view, FIG. 13B is a bottom view, and FIG. 13C is a right side view of the base fitting of the second embodiment.

An embodiment of the present invention will be described with reference to the drawings. In this description, front and rear refer to the front-to-rear direction of the bicycle, with the direction of arrow A in Figs. 3 and 8 being the front direction and the direction of arrow B being the rear direction. Additionally, the width direction refers to the left-to-right direction, indicating the left and right sides of the bicycle, and will be described as the direction of arrow C in Fig. 3. Note that the base fitting of this embodiment is attached with the front surface shown in Fig. 3 facing downward from the front basket, but for the sake of explanation, the front surface (the lower surface in the implemented state) is shown facing upward in Figs. 1 to 5 and 10.

As shown in Figures 8 and 9, the base member 1 of this embodiment is for mounting the front basket 3 on the handlebar 2 side of the bicycle, and supports the front basket 3 from below. The front basket 3 is attached to the front basket stays 5 by the base member 1 of this embodiment. The front basket 3 is completely fixed by attaching it to the base member 1 of this embodiment and the basket bracket 6 extending from the handlebar 2 with the mounting member 50.

The front basket stay 5, which is attached to the axle of the front wheel 4 of the bicycle 1, is made up of legs 5a, 5a that are bolted to the axle and stand upright, and a rod-shaped engaging part 5b with a circular cross section that spans the upper parts of both legs in the width direction above the front wheel 4, and has an overall U-shape. However, when implementing this invention, any rod-shaped member in the width direction below the front basket of the bicycle can also be used as the engaging part.

As shown in FIG. 1, the base 1 of the first embodiment is composed of a cover 10 and a base plate body 20. The cover 10 is a lid-like object having an outer edge common to the outer edge of the base plate body 20, and has walls 11, 11 that hang down from the front edge and the rear edge. The front basket 3 of a bicycle is generally made of a plurality of steel wires spaced at appropriate intervals, and a metal plate is arranged in the front basket mounting portion. The base 1, which is a combination of the cover 10 and the base plate body 20, can be attached to the front basket 3 by attaching it to the metal plate of the front basket 3 (see FIGS. 6 and 7). In fact, the base 1 is imported and transported in a state where it is attached to the front basket 3 at the time of manufacture. Specifically, the installation is possible by passing a screw through the screw parts 29, 29 arranged on the base plate body 20 and the screw holes 12, 12 formed in the cover 10, and passing it through the screw hole of the metal plate 3a of the front basket 3. In this way, the threaded portions 29, 29 of the base plate body 20, the screw holes 12, 12 formed in the cover 10, and the screws (not shown) serve as the cage attachment means for the base fixture 1.

The bottom plate body 20 of the base fitting 1 according to the first embodiment will be described. As shown in Figs. 1 and 2, as well as Figs. 3, 4, and 5, the bottom plate body 20 is a single plate-like object having a first locking portion 21 and a second locking portion 22 that bulge downward (toward the front side shown in Fig. 3) from the plate-like object, and a temporary placement portion 23 with a diagonal longitudinal direction between the first locking portion 21 and the second locking portion 22. The first locking portion 21 has a locking claw 21a that faces from the rear to the front, and the second locking portion 22 has a locking claw 22a that faces from the front to the rear, and although the two locking claws protrude horizontally, they face in different directions in the front-to-rear direction, facing each other.

In the present invention, the opposing direction of the first locking portion 21 and the second locking portion 22 does not mean that they are strictly facing each other, but is premised on the assumption that they face each other from one perspective (e.g., side view) at approximately the same horizontal position (height position), and includes cases where the locking portions are misaligned in the width direction, as described below.

The first locking portion 21 and the second locking portion 22 are arranged with a shift in the width direction. As shown in FIG. 3, the temporary placement portion 23 runs diagonally from the upper right to the lower left in a front view at the center of the width of the bottom plate main body 20, and the surface of the temporary placement portion 23 becomes the temporary placement surface that is the placement surface. With the area where the temporary placement portion 23 is located as the central portion, the first locking portion 21 is located on the lower right side of this central portion on the drawing, and the second locking portion 22 is located on the upper left side of the central portion on the drawing. In this way, the first locking portion 21 and the second locking portion 22 are arranged with their locking positions shifted in the width direction.

The first locking portion 21 bulges downward from the bottom plate body 20, and a locking claw 21a is formed so that the most bulging lower surface protrudes from the rear to the front. A locking groove 21b is formed between the locking claw 21a and the bottom plate body 20 to make the bottom circular toward the side, and an upward protrusion 21c is formed at the tip edge that forms the front side edge of the locking claw 21a. On the temporary placement portion 23 side of the first locking portion 21, an inclined wall 23a is formed so as to be cut out along the diagonal direction of the temporary placement portion 23.

The second locking portion 22, like the first locking portion 21, bulges downward from the bottom plate body 20, and has a locking claw 22a formed so that the most bulging lower surface protrudes from the front to the rear. A locking groove 22b is formed between the locking claw 22a and the bottom plate body 20 to give the bottom a circular shape facing sideways, and an upward protrusion 22c is formed at the tip edge that forms the rear side edge of the locking claw 22a. On the temporary placement portion 23 side of the second locking portion 22, an inclined wall 23a is formed so as to be cut out along the diagonal direction of the temporary placement portion 23.

The locking groove 21b of the first locking part 21 and the locking groove 22b of the second locking part 22 are both grooves recessed to have approximately the same diameter as the rod-shaped locked part 5b, and although there is a temporary placement part 23 between them, they form a single linear locking part that is connected in the width direction. The temporary placement part 23 that crosses diagonally between the locking groove 21b and the locking groove 22b is open at the bottom, so that the locked part 5b can be placed in the temporary placement part 23 by twisting the basket once, and the locked part 5b can then be inserted into the first and second locking grooves 21b, 22b by twisting the basket again.

The state where the locked portion 5b is locked in the first locking groove 21b and the second locking groove 22b is called the locked state, and the position is called the locked position. In this embodiment, the longitudinal direction of the locked portion 5b in the locked position is along the width direction of the bicycle, and this direction is called the locking direction, specifically the direction of the arrow line C in FIG. 3. The temporary placement portion 23 is located between the two locking portions 21 and 22, and is a direction that intersects with the locking direction. In this embodiment, the longitudinal direction of the temporary placement surface is oriented in a direction that is inclined diagonally from the width direction of the arrow line C when viewed from the front, and intersects at the center position between the locking portions to realize a compact configuration. The direction of this longitudinal direction is called the temporary placement direction, specifically the direction of the arrow line D in FIG. 3. The locked portion 5b can be temporarily placed on this temporary placement portion 23, and the front basket 3 can be attached by twisting and twisting the front basket 3. The temporary placement direction and the longitudinal direction of the temporary placement surface may intersect with the locking direction at any position, and may be substantially perpendicular to the locking direction.

The locking claw 21a of the first locking portion 21 and the locking claw 22a of the second locking portion 22 protrude in opposing directions. With the locking claw 21a protruding from rear to front and the locking claw 22a protruding from front to rear, the locked portion 5b can be locked to each other from the front-to-rear direction, where the locking claw 21a and the locking claw 22a face each other, making it possible to maintain a stable locked state.

The two locking claws 21a, 22a have upward protrusions 21c, 22c at their tip edges. The protrusions 21c, 22c are curved and are formed on the locking claws 21a, 22a with a predetermined length across the width. The protrusions 21c, 22c prevent the locked part 5b inserted into the locking grooves 21b, 22b from being easily released from the locked state. On the other hand, the protrusions 21c, 22c have notches 21d, 22d formed by gradually cutting the protrusions on the temporary placement part side in the width direction (see FIG. 5). By forming the notches 21d, 22d, the protrusions 21c, 22c do not hinder the insertion when the locked part 5b placed on the temporary placement part 23 is twisted and inserted, allowing for smooth insertion.

Further forward of the locking claw 21a of the first locking portion 21 and further rearward of the locking claw 22a of the second locking portion 22, there are cut-out open sections 24, 24 without the central temporary placement portion 23. These open sections 24, 24 give the bottom plate body 20 an approximately Z-shaped form in a plan view. In addition, ribs 25, 25 are formed at appropriate positions behind the first locking portion 21 and in front of the second locking portion 22. When placing the locked portion 5b on the temporary placement portion 23, the wearer often peers into the placement state (temporary placement state) on the temporary placement portion 23 to visually confirm it, but these open sections 24, 24 allow the temporary placement portion 23 to be easily seen without being hidden by the first locking portion 21 and the second locking portion 22, making it easier to put on. Furthermore, the inclined walls 23a, 23a on both sides of the temporary placement surface of the temporary placement section 23 act as guides when placing the locked part 5b, making it easy to place it on the temporary placement section 23, which is difficult to see.

Next, a method for attaching the front basket 3 using the base fixture 1 of this embodiment will be described. As described above, the bottom plate member 20 of the base fixture 1 is placed at the bottom position of the front basket 3 by first sandwiching the bottom steel wire of the front basket 3 and then attaching the cover 10. At this time, it is preferable to attach the base fixture 1 to the center position in the width direction of the front basket 3.

As mentioned above, the front basket stay 5 also has the tips of the legs 5a, 5a screwed or bolted to the axle 4a of the bicycle's front wheel 4. As shown in Figures 3, 8, and 9, screws and bolts are generally fastened by turning them to the right (clockwise) (arrows Z1, Y1), so the right leg 5a of the stay 5 is subjected to a forward force (arrow Z2) and the left leg 5a is subjected to a rearward force (arrow Y2). Therefore, the engaged part 5b that connects and spans the upper ends of the two legs 5a, 5a is also subjected to a rearward force (arrow Z3) on the left side (right side on the drawing in Figure 7) and a forward force (arrow Y3) on the right side (left side on the drawing in Figure 7) when viewed from the handlebar side of the bicycle.

The front basket stay 5 is attached to the bottom of the front basket 3 at the center of the width (left-right) of the engaged part 5b. First, the front basket 3 is twisted slightly horizontally to align the longitudinal direction of the engaged part 5b with the inclination direction of the temporary placement part 23, and is placed along the plane of the temporary placement part 23 (temporary placement step). As described above, the first engaging part 21 and the second engaging part 22 bulge out, making it easy to temporarily place the temporary placement part 23 in a position that would normally be difficult to see, thanks to the opening parts 24, 24 and the inclined walls 23a, 23a.

When the twisted front basket 3 is twisted back to its original position with the interlocking portion 5b aligned with the temporary placement portion 23, the temporary placement portion 23 is inserted into the interlocking groove 21b of the first interlocking portion 21 and the interlocking groove 22b of the second interlocking portion 22 with the diagonal direction of the temporary placement portion 23 aligned with the axial direction (longitudinal direction) of the interlocking portion 5b, and is interlocked by the interlocking claws 21a, 22a (interlocking step).

At this time, the protrusions 21c, 22c at the tips of the locking claws 21a, 22a act to lock the locked portion 5b at the locking position, but since the insertion is done gradually from the temporary placement portion 23 side, the presence of the cutouts 21d, 22d reduces the resistance from the protrusions 21c, 22c during insertion, allowing for smooth insertion.

At the locking position where the locked portion 5b is inserted into the locking grooves 21b and 22b, the front basket 3 can be attached to the basket stay 5 by locking with the locking claws 21a and 22a. At this time, as described above, the basket stay 5 is subjected to a force directed backward on the left side and forward on the right side when viewed from the handlebar side of the bicycle in the direction of travel (see FIG. 7). At the center position of this basket stay 5, the first locking portion 21 on the left side of the base 1 has the locking claw 21a facing forward from the rear, and the locking groove 21b is formed with the rear side as the bottom of the groove, so that the basket stay 5 can be held stably by receiving a force directed backward on the left side. Similarly, the second locking portion 22 on the right side of the base 1 has the locking claw 22a facing forward from the front, and the locking groove 22b is formed with the front side as the bottom of the groove, so that the basket stay 5 can be held stably by receiving a force directed forward on the right side.

When the front basket 3 is attached to the basket stay 5 using the base fixture 1 of the first embodiment, the basket stay 5 moves back and forth, so the front basket 3 can be completely attached to the bicycle by attaching it to the basket bracket 6 using the mounting fixture 50 on the back side of the front basket 3.

Next, the second embodiment will be described. As shown in Figures 10 and 11, the base member 101 of the second embodiment is composed of a first engaging portion 121 and a second engaging portion 122 that protrude downward from the base plate body 120. The basic form and function of the base member 101 for engaging the engaged portion of the second embodiment are the same as those of the first embodiment except for those described below, and the parts common to the first embodiment will be omitted in the following description.

The first locking portion 121 of the base fixture 101 bulges downward from the bottom plate body 120, and a locking claw 121a is formed so that the most bulging lower surface protrudes from the rear to the front. A locking groove 121b is formed between the locking claw 121a and the bottom plate body 120 to make the bottom circular toward the side, and a locking spring portion 121c is formed in the bottom plate body 120, which is elastically deformable so as to be able to protrude and retract at a position between the locking position where the locking claw 121a is located and a temporary placement position described below. On the temporary placement portion 123 side of the first locking portion 121, an inclined wall 123a is formed so as to be cut out along the diagonal direction of the temporary placement portion 123.

The second locking portion 122, like the first locking portion 121, bulges downward from the bottom plate body 120, and has a locking claw 122a formed so that the most bulging lower surface protrudes from the front to the rear. A locking groove 122b is formed between the locking claw 122a and the bottom plate body 120 to give the bottom a circular shape facing sideways, and a locking spring portion 122c is formed between the locking position where the locking claw 122a is located and a temporary placement position described below, which is elastically deformable so as to be able to protrude and retract. On the temporary placement portion 123 side of the second locking portion 122, an inclined wall 123a is formed so as to be cut out along the diagonal direction of the temporary placement portion 123.

Between the locking position formed by the two locking parts 121, 122 (locking claws 121a, 122a) and the temporary placement position formed by the temporary placement part 123, there are formed locking spring parts 121c, 122c that can be protruded and retracted by elastic deformation. These locking spring parts 121c, 122c have a protruding part toward the bottom (upward in FIG. 10) and are cut out around the periphery except for the base end part. Since there is an arm part from the base end part to the protruding part, it acts like a spring, so that the protruding part retracts upward (downward in FIG. 10) and is a spring member that can be protruded and retracted by elastic return. The protruding part with the tip of the protruding and retracting locking spring parts 121c, 122c prevents the locked part 5b inserted into the locking grooves 121b, 122b from being easily released from the locked state. In addition, the locking spring parts 121c and 122c are in a position where they do not interfere with the locked part 5b in the temporary placement state, making the temporary placement state stable, and when transitioning to the twisted locked state, the locking spring parts 121c and 122c are retracted and return to the locked state. This clarifies the temporary placement step and the locking step, allowing for a clearer locking operation.

In the second embodiment, the open portions 24, 24 (see FIG. 1) of the first embodiment are not formed, but the locking release portions 124, 124 are formed by cutting out the edge portions of the first locking portion 121 and the second locking portion 122. When the intersection position of the temporary placement portion 123 and the two locking grooves 121b, 122b is taken as the center, these edge portions are the edges opposite the center. The locking release portions 124, 124 are cut out from the raised portion to the tip portion of the locking claws 121a, 122a, which are approximately U-shaped, and the cutout width also reaches the vicinity of the locking spring portions 121c, 122c. The locking release portions 124, 124 allow the temporary placement portion 123 to be easily visible without being hidden by the first locking portion 121 and the second locking portion 122, and further facilitates locking by the locking spring portions 121c, 122c. Furthermore, the inclined walls 123a, 123a on both sides of the temporary placement surface of the temporary placement section 123 act as guides when placing the locked part 5b, making it easy to place it on the temporary placement section 123, which is difficult to see.

1... base fitting, 3... front basket, 5... basket stay, 5a... legs, 5b... latched portion, 20... bottom plate body, 21... first latching portion, 21a... latching claw, 21b... latching groove, 21c... projection, 21d... notch, 22... second latching portion, 22a... latching claw, 22b... latching groove, 22c... projection, 22d... notch, 23... temporary placement portion (temporary placement surface), 23a...inclined wall, 24...opening portion, 120...bottom plate body, 121...first locking portion, 121a...locking claw, 121b...locking groove, 121c...locking spring portion, 122...second locking portion, 122a...locking claw, 122b...locking groove, 122c...locking spring portion, 123...temporary placement portion (temporary placement surface), 123a...inclined wall, 124...opening portion.

Claims (8)

A base for attaching a front basket to a stay for a basket, the stay having a rod-shaped engaging portion extending in the width direction and attached to the bottom of the front basket of a bicycle,
the two locking parts projecting in opposite directions to each other for locking the rod-shaped locked part at a locking position, and a temporary placement part disposed between the two locking parts for temporarily placing the locked part;
The temporary placement portion has a temporary placement direction that intersects with a locking direction of the basket stay at a locking position by the two locking portions,
The two locking portions include a first locking portion having a locking claw that protrudes from the rear to the front on its lower surface while bulging downward from the bottom plate body to form a locking groove into which the locked portion can be inserted, and a second locking portion having a locking claw that protrudes from the front to the rear while bulging downward from the bottom plate body to form a locking groove into which the locked portion can be inserted,
A base member for mounting a bicycle front basket is characterized in that a temporary placement surface is formed on the bottom plate body between the two engagement portions, the temporary placement surface facing in an oblique direction from the engagement direction in which the base plate is engaged at the engagement position. The two locking portions have upward projections formed along the tip edges of the locking claws,
2. The base member for mounting a bicycle front basket according to claim 1 , wherein the projection has a notch formed on the temporary placement surface side. The base device for mounting a bicycle front basket as described in claim 2 , characterized in that it has an open portion that is open in front of the first engaging portion and behind the second engaging portion, and inclined walls are formed on both sides of the temporary placement surface. The basket stay having the engaging portion has two legs that hang down from both ends and are bolted at their lower ends to the axle of the front wheel of the bicycle;
The base device for attaching a bicycle front basket as described in claim 3, characterized in that the two engagement portions are arranged so that the first engagement portion having an engagement claw protruding from the rear to the front is on the left side of the bicycle basket, and the second engagement portion having an engagement claw protruding from the front to the rear is on the right side of the bicycle basket. The bottom device for mounting a bicycle front basket as described in claim 1 , characterized in that a locking spring portion is formed on the bottom plate body between the temporary placement surface and the locking positions of the two locking portions, the locking spring portion being capable of protruding and retracting from the bottom plate body. 6. The bottom device for mounting a bicycle front basket according to claim 5 , further comprising an engagement release portion formed by cutting out edge portions of the first engagement portion and the second engagement portion, and an inclined wall is formed on both sides of the temporary placement surface. The basket stay having the engaging portion has two legs that hang down from both ends and are bolted at their lower ends to the axle of the front wheel of the bicycle;
The base device for attaching a bicycle front basket as described in claim 6, characterized in that the two engaging portions are arranged so that a first engaging portion having an engaging claw protruding from the rear to the front is on the left side of the bicycle basket, and a second engaging portion having an engaging claw protruding from the front to the rear is on the right side of the bicycle basket. A method for attaching a front basket to a basket stay having a rod-shaped engaging portion extending in the width direction of the bicycle using a front basket attachment base tool attached to the bottom of the front basket, comprising:
The front basket mounting bottom tool has two locking parts that protrude in opposite directions to lock the rod-shaped locked part at a locking position, and a temporary placement part that is disposed between the two locking parts to temporarily place the locked part,
The temporary placement portion has a temporary placement direction that intersects with a locking direction of the basket stay at a locking position by the two locking portions,
a temporary placement step of twisting the front basket of the bicycle horizontally to place the front basket so that the temporary placement direction of the temporary placement portion is aligned with the longitudinal direction of the rod-shaped locked portion;
a locking step of twisting the front basket of the bicycle back from the temporary placement step state and locking the rod-shaped locked portion to the two locking portions.

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