JPH0653512B2 - Bicycle pedal folding device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bicycle pedal folding device in which the pedal can be folded in the direction of the crank arm.

[Conventional technology]

Conventionally, a pedal folding device as described above is used to fold the pedal body (for example, Japanese Utility Model Publication No. 62-26304, Japanese Utility Model Publication No.
62-34877) and a system in which the entire pedal is folded from the rotary shaft support of the pedal joint shaft (for example, Japanese Utility Model Publication No. 59-7184).

[Problems to be Solved by the Invention]

In the case of the conventional folding pedals, most of them require a one-to-two operation using both hands at the time of folding, which is difficult to recognize as a true one-touch operation. Also, in the case of a method of folding the pedal body as disclosed in Japanese Utility Model Publication No. 62-26304 and Japanese Utility Model Publication No. 62-34877, the folding portion is insufficient (about half the pedal length), Even in the folded state, the protruding part remains at the tip of the crank arm for a long time, and it does not completely fulfill the purpose and function of the folding pedal. On the other hand, even for a device that seems to be close to the purpose and function of a folding pedal (for example, the pedal folding device disclosed in Japanese Utility Model Publication No. 59-7184), a method of fixing the pedal when the crank arm and pedal are at a right angle. And the measures against the load are insufficient, and the folding mechanism part has rattling, which makes it less practical and practical.

In the case of the present invention, not only being restricted by the structure of the pedal fold, but also being able to smoothly enter and leave the bicycle parking lot during actual daily use, and not to disturb the walking of the bicycle. Since the main purpose was to invent, the invention was invented with an emphasis on practicality and feasibility. In this invention, the following problems due to the nature of the pedal were posed and solved.

When a person rides a bicycle, he / she begins to ride on one foot, so that one pedal has a load of at least one person.

When the vehicle is running, the pedal rotates, and a load is applied to the joint between the crank arm and the pedal (folding mechanism part) from all directions of 360 degrees. . Therefore,
The joint should not be loose at all.

It is necessary to take some measures to prevent the pedals from being accidentally folded while driving.

The present invention was devised to solve all of the above-mentioned structural and mechanical problems, and its purpose is to be able to handle loads from any direction and not to rattle.
The pedal can be securely locked so that it will not be folded while driving, the pedal can be folded with one hand and easily unlocked with one or two fingers, and the folding pedal can be used normally. When you raise it to the state, you can easily restore it by stepping with one hand or foot, at this time the lock mechanism automatically operates and the pedal can be automatically locked, and the folding mechanism part is compact and obstructive. Another object of the present invention is to provide a folding device for a bicycle pedal, which has many features such as a neat appearance that is not much different from the existing pedal mechanism in appearance.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the bicycle pedal folding device of the present invention is provided with a pedal folding joint portion at the tip of a crank arm, and the concave fitting portion of the pedal folding joint portion is provided with the concave fitting portion. The pedal joint shaft formed in the cross-sectional shape to be joined is fitted in a meshed state, and the pivot shaft is fitted into the base end side shaft hole of this pedal joint shaft and the joint part shaft hole that matches the shaft hole, and the crank arm is attached to the crank arm. The pedal which is pivotally mounted at a right angle to the crank arm is configured to be folded toward the crank arm using the pivot as a fulcrum, and the pedal is folded at the pedal folding joint portion of the crank arm while the pedal joint shaft is running. Lock mechanism that locks the pedal so that the pedal is automatically folded to the crank arm side by the rotational urging force of the pedal jump spring when the lock mechanism is unlocked. Special It is an.

The lock mechanism can be easily unlocked by one-touch operation with one finger when the pedal is folded, and when the folding pedal is brought into a normal use state, it is automatically locked by the pressing action by the return rotation of the pedal joining shaft. It is possible to apply various structures as long as the automatic locking mechanism is in a mechanically locked state. However, the practically preferable first structure of this locking mechanism, especially an adult in which a large load is applied to the pedal portion. As a structure suitable for a bicycle for bicycles and the like, it has an arc-shaped fitting portion for holding a lock receiving round shaft portion of a pedal joint shaft, and is pivotally attached to one side wall cutout portion of the pedal folding joint portion so as to be openable and closable. An arm lock fitting that is urged to rotate by a spring in the opening direction, a tip fitting portion for locking the lock fitting that engages with an inner end fitting portion of the arm lock fitting in a disengageable manner, and the tip fitting portion. Hanging state It has a stopper part for restricting the position, and is pivotally biased by a spring in the engaging direction of a lock fitting axially attached to the pedal folding joint part so that it can be engaged and disengaged with the other side wall notch part. It is preferable to include a safety lock fitting and a lock release operation section for manually rotating the safety lock fitting in the engagement / disengagement direction against the spring force.

A second structure, which is practically preferable for the lock mechanism,
Particularly, as a structure suitable for an adult bicycle or the like in which a large load is applied to the pedal portion similar to the above, an outer end hook portion engaged with notches on both ends of the pedal joint shaft and an inner end with which the lock guide pin is engaged. A pair of left and right arm lock fittings that have engaging portions and are rotatably biased by springs in the opening direction that are pivotally attached to the notches on both side walls of the pedal folding joint portion so as to be openable and closable; A pair of left and right lock guide plates that have a lock guide pin that engages with the inner end engaging portion and that are adjacent to the arm lock fitting and are coaxially supported by the rotation support shaft of the arm lock fitting; A pair of left and right lock guide plates that are fitted into the guide plate facing each other to maintain the locked state of the arm lock fittings, and a safety lock piece that can be moved in the fitting / removing direction, and this safety lock piece is fitted between the lock guide plates. Arm lock from position A moving operation shaft having a push button for unlocking for pushing and moving to the lock releasing position between the tools, and a safety lock piece that fits the moving operation shaft between the lock guide plates and the push button protrudes to the operating position. It is preferable that it is composed of a spring that urges against.

Furthermore, as a practically preferable third structure of the lock mechanism suitable for a child's bicycle or the like where a large load is not applied to the pedal portion, a tip hook with which the lock mechanism engages with the tip engaging portion of the pedal joint shaft is provided. And a rotatable single locking metal fitting pivotally attached to the end of the concave fitting portion of the pedal folding joint so as to be manually unlocked, and the single locking metal fitting is rotated in the locking direction. It consists of a spring that biases the lock fitting, and the tip of the lock fitting and the end locking portion of the pedal joint shaft make slope contact when the folding pedal is raised to normal use, and the lock fitting resists the spring force. It is also possible to provide a simple lock structure provided with an inclined surface portion for automatic locking that allows it to escape and rotate.

Furthermore, as a pedal folding device having a relatively simple structure similar to that described above and suitable for children's bicycles where a large load is not applied to the pedal part, a convex shape with a step difference preventing left and right rattling at the tip of the crank arm is provided. An L-shaped pedal fold joint consisting of a fitting portion and a lock support wall with a lock hole is provided, and the concave fitting portion of the pedal joining metal fitting is engaged with the convex fitting portion of this pedal fold joining portion. When the pedal is fitted in the state, the pivot shaft is inserted into the base end side shaft hole of this pedal joint fitting and the tip end shaft hole of the convex fitting portion that matches the shaft hole, and the pedal is attached at a right angle to the crank arm. A sliding type lock fitting having an inclined surface at the lower end of the tip fitted into a lock hole of a pedal folding joint lock wall in the pedal joint fitting, wherein the pivot joint serves as a pivotal fulcrum for folding to the crank arm side; , This lock fitting A lock mechanism that includes a lock push-out spring that urges the tip of the tool to partially protrude from the tip surface of the pedal joint fitting, and a lock release slide button that moves the lock fitting back and forth against the spring force. It is also possible to apply a structure in which the pedal is automatically folded to the crank arm side by the rotational biasing force of the pedal jumping spring when the lock mechanism is unlocked.

[Action]

By applying the pedal folding device with extremely high practicality and feasibility as described above to the bicycle pedal, if the pedal does not obstruct the transportation from the factory, the display at the store, and the entry and exit from the bicycle parking lot. Without the problem, the storage will be smooth, and the problem of the pedal being caught and the bicycle next to you falling down can be prevented. Therefore, bicycles can be parked in public areas such as in front of stations and sidewalks, which is useful for traffic safety and beautification of the city. Also, when the user walks with the bicycle aside, the pedal is not bothered, so that the user can carry it easily and safely.

On the other hand, mass production of the folding device can reduce the cost, and by introducing it into the market, demand for replacement can be promoted, and the industry and the market can be activated.

〔Example〕

Hereinafter, a first embodiment of the present invention will be specifically described with reference to FIGS. 1 to 7. This embodiment shows a pedal folding device suitable for an adult bicycle or the like where a large load is applied to the pedal portion. This pedal folding device is provided with a pedal folding joint portion 2 at the tip of a crank arm 1, and this pedal folding device is provided. A U-shaped concave fitting portion 3 having an opening in the crank arm extension direction of the joining portion 2 is engaged with a pedal joining shaft 4 formed in a cross-sectional shape for joining the concave fitting portion 3 in a meshed state,
A pivot shaft 7 is inserted into the base end side shaft hole 5 of the pedal joint shaft 4 and the tip end shaft holes 6 of the pedal folding joint side walls 3a, 3b which match the shaft hole 5, and the pivot shaft 7 is washer 8a, 8b. By fastening with a cap nut 8 via the pedal, a pedal 10 pivotally mounted at a right angle to the crank arm 1 can be folded toward the crank arm 1 side with the pivot shaft 7 as a fulcrum as shown in FIG. is doing.

The pedal 10 is connected to the pedal joint shaft 4 by a screw-type pedal receiver 9 as shown in FIG.
A bearing incorporated in the central axis (not shown) of the shaft allows free rotation around the shaft center. Also,
As shown in FIG. 3, a U-shaped cutout hole 12 having a planar U shape for allowing the pedal folding as described above is provided in the lower surface of the tip end side portion of the pedal folding joint portion 2 located below the pivot 7.

A lock mechanism 13 for locking the pedal joint shaft 4 is incorporated in the pedal folding joint portion 2 of the crank arm 1 so that the pedal 10 will not be folded during traveling. When the lock is released, the pedal 10 is automatically folded toward the crank arm 1 side by the rotational biasing force of the pedal hoisting spring 11. The pedal hoisting spring 11 is fitted on the pivot 7. It is composed of a pair of torsion springs to be inserted, and the pair of torsion springs 11 are extended at one end so as to be embedded in the abutting portions of both side walls 3a and 3b of the pedal folding joint portion 2 and both side surfaces of the pedal joint shaft 4. The output spring wire portion 11a is the pedal joint shaft 4
Is fitted and fixed in the spring grooves 5a on both sides of the other end of the spring wire portion 11b.
Are fitted and fixed in the inner spring grooves 6a of the both side walls 3a, 3b.

The lock mechanism 13 can be easily unlocked by one-touch operation with one finger when the pedal is folded, and when the folding pedal 10 is raised in a normal use state, the lock mechanism 13 is locked by a pressing action by a return rotation of the pedal joining shaft 4. It is configured as an automatic locking mechanism that is automatically locked, and its specific structure is a circular arc (abbreviated shape) fitting that holds the lock receiving round shaft portion 4a formed near the tip of the pedal joint shaft 4. An openable and closable arm lock fitting 14 having a portion 14a, a tip fitting portion 15a for locking the lock fitting that engageably engages with an inner end locking portion 14b of the arm lock fitting 14 and the tip engagement. A rotatable safety lock metal fitting 15 having a stopper portion 15b for rotation limit that regulates the position of the portion 15a with respect to the arm lock metal fitting 14, and a manual operation of the safety lock metal fitting 15 in the engagement / disengagement direction. Rotate with And a lock release button 16 as a release operation unit.

To further explain, the arm lock fitting 14 is provided with an arm lock fixing bolt 18 at one side wall notch 17 of the pedal folding joint 2.
(This bolt is attached by inserting the bolt from the notch communicating hole 19 of the one side wall 3a of the joint portion into the pivot support hole 20 of the arm lock fitting 14 and screwing the tip screw portion into the screw hole 21 of the notch wall surface.)
Is pivotally mounted so as to be openable and closable, and is rotationally biased by a torsion spring 22 in the opening direction. In this torsion spring 22, one end extending spring wire portion is embedded in the rear surface spring groove 23 of the arm lock fitting 14, and the other end extending spring wire portion is embedded in a wall surface spring groove (not shown) of the cutout portion 17. It is fitted and fixed, and when the arm lock fitting 14 is unlocked, the tip end is rotated so as to abut against the upper jaw portion 24a of the other side wall notch 24 of the pedal folding joint 2 as shown in FIG. 5 (c). I am motivated.

The safety lock fitting 15 is provided with a safety lock fixing bolt 25 on the other side wall notch 24 of the pedal folding joint 2 (this bolt is provided from the notch communicating hole 26 of the joint other side wall 3b to the pivot support hole of the safety lock fitting 15).
It is inserted into 27 and is attached by screwing the tip screw part into the notched wall surface screw hole 28.) It is pivotally attached so that it can be engaged and disengaged, and it is rotated by a torsion spring 29 in the direction of engagement with the arm lock fitting 14. Being energized. Like the torsion spring 22 of the arm lock fitting 14, the torsion spring 29 has one end extending spring wire portion embedded in the rear spring groove 30 of the safety lock fitting 15,
The other end extending spring wire portion is fitted and fixed so as to be embedded in a wall surface spring groove (not shown) of the cutout portion 24, and the safety lock fitting 15 is provided with the stopper portion 15b on the upper inner surface portion 24b of the other side wall cutout portion 24. As shown in FIG. 4, it is urged to rotate so as to abut. The lock release button 16 for rotating the safety lock fitting 15 in the engaging / disengaging direction against the force of the spring 29 has a shaft 16
a is inserted into a guide groove 2a of an arc-shaped long hole centered on the notch communication hole 26 formed in the end wall portion of the pedal folding joint portion 2, and the shaft tip screw portion is attached to the tip screw hole 15c of the safety lock fitting 15. It is fixed to the safety lock fitting 15 by being screwed on.

2 to 4 show the pedal 10 and the pedal connecting shaft 4 thereof.
FIG. 4 shows a state in which the lock mechanism 13 is locked so as to be at a right angle to the crank arm 1. In this locked state, the arm lock fitting 14 locks the lock receiving round shaft portion 4a of the pedal joint shaft 4 in FIG. As described above, the tip end engaging portion 15a of the safety lock metal fitting 15 is engaged with the inner end hooking portion 14b of the arm lock metal fitting 14, and the stopper portion 15b of the safety lock metal fitting 15 is at the rotation limit regulating position. The other side wall notch 24 is brought into contact with the upper step inner surface 24b to prevent the arm lock fitting 14 from rotating in the opening direction (lock releasing direction), whereby the pedal 10 is unexpectedly run. It prevents it from being folded. In this case, in FIG.
The contact surface indicated by T'generates the principle of leverage by using the pedal pivot 7 as a fulcrum, and bears a large load acting in the W direction (a load acting when the crank arm 1 rotates right below). By the way, the load applied from the X direction in FIG. 3 (the load acting when the crank arm 1 rotates right above) is light in practical use, and the total weight of the user is not applied. The lock by the mechanism 13 can be dealt with mechanically sufficiently. Further, both side walls 3a, 3b of the pedal joint portion 2 are joined to both side surfaces of the pedal joint shaft 4 to prevent rattling of the pedal joint portion in the left-right direction and to reinforce the pedal joint portion.

When folding the pedal 10 as needed,
In the pedal locked state as shown in FIGS. 2 to 4,
If you push down the lock release button 16 by hand along the guide groove 2a,
The safety lock fitting
15 disengages from the state shown in FIG. 5 (a) to the state shown in FIG. 5 (b), and the arm lock fitting 14 and the safety lock fitting 15 are engaged and disengaged. When released, the arm lock fitting 14 is rotated in the opening direction by the rotation biasing force of the spring 22, and at the same time, the pedal joint shaft 4 is flipped up by the rotation biasing force of the spring 11 as shown in FIG. It is rotated. Then, the arm lock fitting 14
When the tip end of the pedal is abutted against the jaw portion 24a and the open state is shown in FIG. 5 (c), the pedal joint shaft 4 is completely released from the constraint by the arm lock fitting 14, and the spring 11 is rotated. The pedal 10 is rotated in the folding direction as it is by the force, so that the pedal 10 is folded along the side surface of the crank arm 1 so as not to get in the way, as shown in FIG. At this time, when the safety lock fitting 15 is released from the lock release button 16, the safety lock fitting 15 is returned and rotated by the force of the spring 29 to the original state as shown in FIG. The pedal 10 comes to stand by at the lower position of the arm lock fitting 4 in a state in which the pedal joint shaft 4 of the pedal 10 can be received).

Then, when the folding pedal 10 folded as shown in FIG. 6 is raised to a normal use state, the crank arm 1 is moved to the pedal 10
The pedal 10 is stopped so that it is located on the lower side as shown in FIG. 7, and in this state the pedal 10 stands upright (in FIG. 7, only the pedal connecting shaft 4 is shown, and the pedal 10 is omitted. Is pushed down with one hand or stepped on with a foot, the arm lock fitting 14 and the safety lock fitting 15 in the open state (state where the pedal joint bearing is inserted) are pressed by the return action of the pedal joint shaft 4 so that the spring 22, When the crank arm 1 and the pedal 10 and the pedal joint shaft 4 are at a right angle by being pushed up and rotated from the state of FIG. 7 (a) to the state of FIG. 7 (b) against the force of 29, the arm lock is performed. The metal fitting 14 and the safety lock metal fitting 15 are engaged as shown in FIG. 7 (c), and the arm lock metal fitting 15 firmly holds the lock receiving round shaft portion 4a of the pedal joint shaft 4 to automatically move the pedal joint shaft 4 automatically. The lock will be completed.

Next, a second embodiment of the present invention will be described with reference to FIGS. This embodiment shows a pedal folding device suitable for an adult bicycle or the like where a large load is applied to the pedal portion, and this pedal folding device has a pedal folding joint portion 2 at the tip of a crank arm 1. The pedal joint shaft 4 formed in a substantially D-shaped cross section that is joined to the concave fitting portion 3 is fitted into the concave fitting portion 3 that opens in the crank arm extension direction of the pedal folding joint portion 2 in a meshed state. The pivot shaft 7 is fitted into the base end side shaft hole 5 of the pedal joint shaft 4 and the tip end shaft holes 6 of the pedal folding joint side walls 3a and 3b which coincide with the shaft hole 5 and the pivot shaft 7 is inserted. By fixing the nut 8'through the washer 8a, the pedal 10 pivotally attached to the crank arm 1 at a right angle can be folded toward the crank arm 1 side with the pivot 7 as a pivot. Point, the pedal joint shaft 4 has a pedal 10 A bearing incorporated in a central shaft (not shown) of the dull receiver 9 is coupled to the pedal receiver 9 by screwing a base end protruding screw 32 as shown in FIG. 9 so as to freely rotate around an axis. 9 is a planer D-shaped cutout hole 12 that allows pedal folding as shown in FIG. 9 on the lower surface of the tip end side of the pedal folding joint 2 which is located below the pivot 7. The pedal folding joint 2 has a lock mechanism 13 for locking the pedal joining shaft 4 so that the pedal 10 is not folded during traveling, and when the lock mechanism 13 is unlocked, the pedal 10 is pedaled. It is designed so that it can be automatically folded toward the crank arm 1 side by the rotational biasing force of the flip-up plate 11 '(however, this pedal-jumping plate spring 11' is attached to the pivot shaft 7).
Has a curved portion 11c that is fitted and inserted into the center spring hooking groove 7a of the pedal joint shaft 4 and has a spring plate portion 11d extending from one end thereof.
As shown in FIG. 9, it contacts the inner bottom face of the other end of the spring plate part 11 and extends.
e is incorporated so as to be inserted into the inner bottom spring groove 6b of the concave fitting portion 3) and the like, and the pedal folding device of the embodiment of FIG. 1 shown in FIGS. Since the configuration is substantially the same, a configuration of the lock mechanism 13 different from that will be described below.

The lock mechanism 13 in the second embodiment can be easily unlocked by one-touch operation with one finger when the pedal is folded, and the return movement of the pedal connecting shaft 4 when the folding pedal 10 is raised in a normal use state. It is common to the first embodiment in that it is configured as an automatic lock mechanism that is automatically locked by being pressed by the pressing action by the above, but its specific structure is a notch on both ends of the pedal joint shaft 4. A pair of openable and closable arm lock fittings 33, 34 having outer end hook portions 33a, 34a engaged with the portions 4b, 4c and inner end engagement portions 33b, 34b with which the lock guide pins 35, 36 are engaged. And a pair of rotatable left and right lock guide plates 37 and 38 having lock guide pins 35 and 36 that engage with the inner end engaging portions 33b and 34b of the arm lock fittings 33 and 34, respectively, and the lock guide plates. The pair of left and right lock guide plates 37, 3 are fitted into the facing spaces of the plates 37, 38. 8 and the safety lock piece 39 that can be moved in the insertion / removal direction to maintain the locked state of the arm lock fittings 33 and 34, and the safety lock piece 39 from the fitting position between the lock guide plates 37 and 38 to the lock piece installation recess. Push button for unlocking, which is guided by the lock piece detent guide surface 56a at position 56 (see FIG. 9) and pushed to move to the unlocked position between the arm lock fittings 33, 34.
A moving operation shaft 41 having 40, and a spring 4 for biasing the moving operation shaft 41 so that the safety lock piece 39 is fitted between the lock guide plates 37 and 38 and the push button 40 projects to the operation position.
It is composed of 2,43 and.

To further explain, the arm lock fittings 33, 34 are provided with arm lock fixing bolts 46, 47 at both side wall cutouts 44, 45 of the pedal folding joint 2 (this bolt is a cutout communication hole 48 of the joint side walls 3a, 3b). , 49, and pivot support holes 37c of lock guide plates 37, 38 described later,
38c and the arm lock fittings 33, 34 are inserted through the pivotal support holes 33c, 34c and screwed into the notched wall surface screw holes 44a, 45a so that the screw can be opened and closed. The torsion springs 50 and 51 are urged to rotate in the opening direction. In the torsion springs 50 and 51, one end extending spring wire portion is embedded in a front spring groove (not shown) of the arm lock fittings 33 and 34, and the other end extending spring wire portion is the wall surface spring groove of the cutout portions 44 and 45. It is assembled so as to be embedded in 52, and is urged to rotate so that the arm lock fittings 33, 34 are opened as shown in FIG.

The lock guide plates 37, 38 are pivot support holes 37c, 38c that match the pivot support holes 33c, 34c of the arm lock fittings 33, 34, and lock guide pins.
Arm lock fixing bolts 46, 47 having pin fitting holes 37b, 38b for fixing 35, 36 are provided adjacent to the arm lock fittings 33, 34 and are pivotal pivots of the arm lock fittings 33, 34. It is coaxially mounted. The lock guide plates 37, 38 are provided between the tip ends of the lock guide plates 37, 38 so that the arm lock fittings 33, 34 are provided.
A tension spring 53 is stretched so as to open and close in conjunction with. Further, the movement operation shaft 41 has a shaft end screw portion 41b to which the push button 40 is screwed, and a central screw hole 3 of the safety lock piece 39.
9a has an intermediate screw portion 41a to be screwed, and is inserted into the lock piece mounting recess 56 through the center communication hole 56 of the button fitting hole 55 formed in the end wall portion of the pedal folding joint portion 2. The intermediate screw portion 4 is inserted in the central screw hole 39a of the safety lock piece 39 located in the place 56.
The elastic force of the coil spring 42 and the coil spring 42 built in the button insertion hole 55 is inserted by screwing 1a and inserting the protruding shaft portion into the inner insertion hole 57 of the coil spring 43 as shown in FIG. The safety lock piece 39 is urged so as to come into contact with the one end wall surface of the recess 57.

9 to 11 show the pedal 10 and the pedal connecting shaft 4 thereof.
Shows a state in which the lock mechanism 13 is locked so as to be at a right angle to the crank arm 1. In this locked state, the tip hooks 33a, 34a of the arm lock fittings 33, 34 are attached to the tip of the pedal joint shaft 4. The lock guide plates 37 and 38 which are engaged with the notches 4b and 4c on both sides as shown in FIG. 11 and which are interlocked with the arm lock fittings 33 and 34 and the lock guide pins 35 and 36 are safety lock pieces.
It is locked by inserting 39, and the arm lock fitting 3
Rotation of 3, 34 in the opening direction (lock releasing direction) is prevented, and thereby, the pedal 10 is prevented from being abruptly folded during traveling or the like. In this case, the contact surface S between the pedal joint shaft 4 and the concave fitting portion 3 shown in FIG. 9 generates a lever principle with the pedal pivot shaft 7 as a fulcrum, and a large load acting in the W direction (the crank arm 1 is directly below). Load acting on the pedal joint portion 2), and the side walls 3a and 3b of the pedal joint portion 2 and the both side surfaces of the pedal joint shaft 4 are joined together to prevent rattling of the pedal joint portion in the left-right direction. It will act as a reinforcement.

When folding the pedal 10 as needed,
In the pedal locked state as shown in FIGS. 9 to 11,
When the push button 40 for unlocking is pushed against the elasticity of the springs 42, 43, the safety lock piece 39 is disengaged from between the lock guide plates 37, 38 by this push operation, and the space between the arm lock fittings 33, 34 is released. As shown in FIG. 12, the lock guide plates 37, 38 are released from the locked state, the arm lock fittings 33, 34 are released by the rotation biasing springs 50, 51, and the lock guide plates are released. The plates 37 and 38 are closed and rotated as shown in FIG. 13 by the force of the tension spring 53 and the lock guide pins 35 and 36, and the pedal joint shaft 4 is flipped up by the rotation biasing force of the pedal jumping spring 11. When the pedal 10 is rotated, the pedal 10 is folded into a state substantially similar to the state shown in FIG. At this time, the safety lock piece 39
Is pressed by the urging force of the springs 42 and 43 against the back surface of the lock guide plates 37 and 38 in the closed state as shown in FIG.
In addition, the lock guide plates 37 and 38 are partially exposed in the arm lock fittings 33 and 34 in the open state and stand by as shown in FIG.

Thus, when the folding pedal 10 folded as described above is raised to a normal use state, the crank arm 1 is placed on the lower side of the pedal 10 as in the case of the first embodiment. As shown in FIG. 14, when the pedal 10 standing in the upright position is tilted with one hand or with the foot in the direction shown by arrow A in FIG. The pedal joint shaft 4 is received in the arm lock fittings 33, 34 which are in the open state (state in which the pedal joint bearing is inserted) by the pressing action of the return rotation of the pedal 4, and thereby the lock guide plate.
The arm lock fittings 33, 34 are closed to lock the pedal joint shaft 4 by pushing up and rotating 37, 38 and interlocking with the lock guiding pins 35, 36. Then, when the pedal joint shaft 4 becomes perpendicular to the crank arm 1, the pushing action of the pedal joint shaft 4 causes the lock guide plates 37 and 38 to have a space in which a safety lock piece 39 is fitted between the opposed portions (opposed gap). 9) through the safety lock piece 39, which is opened so that the lock guide plates 37, 38 are engaged with each other, in this state. 11
The automatic lock as shown in the figure will be completed.

FIGS. 15 to 18 show a practically preferred third embodiment of the present invention (an embodiment of a pedal folding device suitable for children's bicycles or the like in which the pedal portion is not too heavyly loaded). The lock mechanism 13 has a tip hook portion 61 that engages with the tip engaging portion 4d of the pedal joint shaft 4, and a lock fitting so that the concave fitting portion 3 end of the pedal folding joint portion 2 can be manually unlocked. A pivotable single locking bracket 62 pivotally mounted on a pivot 67 (the pivot 67 of this locking bracket is shown on both side walls 3a, 3b of the joint).
Shaft hole 68 and the pivotal support hole 69 of the lock fitting 62, and is tightened and fixed by a nut 70), and a spring 63 for biasing the single lock fitting 62 to rotate in the locking direction. , The tip hook portion 61 of the lock fitting 62 and the tip catching portion 4d of the pedal joint shaft 4 make slope contact when the folding pedal 10 is raised in a normal use state, and the lock fitting 62 is made elastic by the spring 63. It is constructed as a simple lock structure with inclined surfaces 64 and 65 for automatic locking that allow it to escape and rotate as shown in Fig. 18 (b), and the operating state when unlocking is shown in Fig. 16. The folding state of the pedal 10 is shown in FIG. 17, and the operating state when the folding pedal 10 is raised to a normal use state is as shown in FIG. 18, so that the first and second embodiments described above are performed. The parts common to the examples are denoted by the same reference numerals, and the description of the other configurations and the description of the operation will be omitted.

Similar to the third embodiment (the embodiment shown in FIGS. 15 to 18), FIGS. 19 to 22 show a pedal folding device suitable for children's bicycles, etc. where a large load is not applied to the pedal portion. A fourth preferred embodiment is shown practically, in which the pedal folding device includes a convex fitting portion 72 having a step 71 for preventing left and right rattling and a lock hole at the tip of the crank arm 1.
An L-shaped pedal folding joint 2 including a lock supporting wall 74 having 73 is provided, and a convex fitting portion of the pedal folding joint 2 is provided.
The concave fitting portion 76 of the pedal joint fitting 75 is fitted into 72 in a meshed state, and the base end side axial hole 77 of this pedal joint fitting 75 and the tip end shaft of the convex fitting portion 72 that matches the shaft hole. A pedal that is pivotally attached at a right angle to the crank arm 1 by inserting a pivot shaft 79 into the hole 78 and fastening and fixing the pivot shaft 79 with a washer 80 and a nut 81.
20 is constructed so that it can be folded toward the crank arm 1 side with the pivot 79 as the pivotal fulcrum as shown in FIG. 20, and the pedal joint fitting 75 is fitted into the lock hole 73 of the pedal folding joint lock wall 74. A slide-type lock fitting 83 having an inclined surface 82 on the lower side, and a lock push-out spring 84 for urging the lock fitting 83 such that the end of the fitting partially projects from the end surface of the pedal joining fitting 75. A lock mechanism 13 including a lock release slide button 86 that can be moved back and forth along a long hole 85 that moves the lock metal fitting 83 in and out against the spring force.
When the lock mechanism 13 is unlocked, the pedal 10 is automatically folded toward the crank arm 1 by the rotational biasing force of the pedal springs 11 '.

The leaf spring 11 'has a bent portion 11c which is inserted into the pivot 79 of the pedal joint fitting 75, and has a spring leaf portion 1 extending from one end thereof.
1d is fitted in the recess inner spring groove 88 of the pedal joint fitting 75, the other end extending spring plate portion 11e is fitted in the upper surface spring groove 87 of the convex fitting portion 72, and is assembled as shown in FIG. Further, the lock fitting 83 is slidably fitted in the lock fitting fitting hole 75a of the pedal joining fitting 75 so that the lock fitting 83 can be moved in and out by sliding operation of the slide button 86.

In this embodiment, when the pedal 10 is folded, the lock release slide button 86 is slid to the right as shown in FIG. 21 (a) to FIG. 21 (b).
Moves back and forth against the elastic force of the spring 84 as shown in FIG. 21 (b), which causes the tip of the lock fitting 83 to move into the lock hole 73.
It comes off and is unlocked. Then, the pedal joint fitting 75 is flipped up by the elastic force of the leaf spring 11 'to a state as shown in FIG. 21 (c), so that the pedal 10 is folded toward the crank arm 1 side.

Further, when the folding pedal 10 is raised and returned to the original usage state, if the pedal 10 is stepped down with one hand or a foot while the crank arm 1 is stopped to rotate right below, the pedal 10
10 tilts and rotates in the direction shown by the arrow A in FIG. 22 (a), and the tip end inclined surface 82 of the slide type lock fitting 83 locks the lock support wall 74.
As shown in FIG. 22 (b), the lock metal fitting 83 is pushed back against the elastic force of the spring 84 due to the slope guiding action. Then, when the pedal 10 is at a right angle to the crank arm 1, the lock fitting 83 is pushed out by the spring force, and the tip end thereof is engaged with the lock hole 73 as shown in FIG. Will be completed.

〔The invention's effect〕

Since the bicycle pedal folding device of the present invention is configured as described above, it has the following excellent effects.

(1) It can handle loads from all directions that act on the pedal joint, and it does not rattle.

(2) The pedal can be securely locked so as not to be folded during traveling, and when the pedal is folded, it can be easily unlocked with one hand and with one or two fingers.

(3) When the folding pedal is raised to normal use, it can be easily restored by stepping it up with one hand or foot.At this time, the locking mechanism automatically operates to automatically lock the pedal. it can.

(4) The folding mechanism is compact and unobtrusive, and it has a neat appearance that is not much different from the existing pedal mechanism.

(5) Therefore, by applying the pedal folding device with extremely high practicality and feasibility as described above to the bicycle pedal, during transportation from the factory, display at the store, and even when putting in and out at the bicycle parking lot, The pedals do not get in the way and the storage is smooth, and it is possible to prevent the problem that the pedals get caught and the bicycle next to you falls. Therefore, bicycles can be parked in public places such as in front of train stations and sidewalks, which is useful for traffic safety and beautification of the city. Also, when the user walks with the bicycle aside, the pedal is not bothered, so that the user can carry it easily and safely.

(6) On the other hand, by mass-producing the folding device, it is possible to reduce costs, and by introducing it into the market, demand for replacement can be promoted and the industry and market can be activated. is there.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a main part showing a bicycle pedal folding apparatus according to a first embodiment of the present invention, and FIG. 2 is a crank arm tip portion (pedal joint portion) in an assembled state of the pedal folding apparatus. Rear view of Fig. 3 and Fig. 3 II of Fig. 2.
A central vertical cross-sectional view taken along the line I-III, FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 3, and FIGS. 5 (a) to 5 (c) show operating states when the pedal is folded. FIG. 6 is an explanatory view showing a pedal folded state in a relation between a rear view and a side view, and FIGS. 7 (a) to 7 (c) are operations when the folding pedal is raised to a normal use state. FIG. 8 is an operation explanatory view showing a state, and FIG.
10 is an exploded perspective view of a main part of the bicycle pedal folding device according to the embodiment, FIG. 9 is a central longitudinal sectional view of a crank arm tip portion (pedal joint portion) in the assembled state of the pedal folding device, FIG. 11 is a left side view of FIG. 9, 11
The figure is a sectional view taken along the line V-V in FIG.
Fig. 13 is an operation explanatory diagram showing the operating state when the pedal is folded,
FIG. 14 is an operation explanatory view showing an operating state when the folding pedal is raised to a normal use state, and FIG. 15 is an exploded view of main parts showing a bicycle pedal folding device according to a third embodiment of the present invention. 16 (a) to 16 (c) are operation explanatory views schematically showing an operating state of the pedal folding device when the pedal is folded, and FIG. 17 is a side view of essential parts showing the pedal folded state. , 18th
FIG. 19 is a motion explanatory view schematically showing an operating state when the folding pedal is raised to a normal use state, and FIG. 19 is a main part showing a bicycle pedal folding device according to a fourth embodiment of the present invention. 20 is an exploded perspective view of FIG. 20, FIG. 20 is a perspective view of an essential part of the pedal folding device shown in a pedal folded state, and FIG. 21 is an operation explanatory view schematically showing an operating state of the pedal folding device when the pedal is folded. FIG. 22 is an operation explanatory view schematically showing an operating state when the folding pedal is raised to a normal use state. DESCRIPTION OF SYMBOLS 1 ... Crank arm, 2 ... Pedal folding joint, 3 ... Recessed fitting portion, 3a, 3b ... Side walls of pedal folding joint, 4 ... Pedal joint shaft, 4a ... Lock receiving round shaft portion, 4b, 4c ... Notches on both sides of the pedal joint shaft, 4d ... Hooking portion at the tip, 5 ... Base end side shaft hole of the pedal joint shaft, 6 ... Joint shaft hole, 7 ... Axis, 10 ... Pedal, 11, 11 '... Pedal jumping spring, 13 ... Lock mechanism, 14 ... Arm lock fitting, 14a ... Arc-shaped fitting part, 14b
… Inner end latching part, 15… Safety lock fitting, 15a… Tip engaging part, 15b… Stopper part, 16… Lock release button, 17… One side wall cutout part, 18… Arm lock fixing bolt, 22… Arm lock fitting Rotation biasing spring, 24 ... other side wall notch, 25 ... safety lock fixing bolt, 29 ... safety lock fitting rotation biasing spring,
33, 34 ... A pair of left and right arm lock fittings, 33a, 34a ... Outer end hook portion, 33b, 34b ... Inner end engaging portion, 35, 36 ... Lock guide pin, 3
7,38 ... Lock guide plate, 39 ... Safety lock piece, 40 ... Push button, 41 ... Movement operation shaft, 42,43 ... Spring for urging movement operation shaft, 44,45 ... Notches on both side walls, 46,47 … Arm lock fixing bolts, 50, 51… Arm lock fitting rotation bias springs, 6
1 ... Tip hook part, 62 ... Single locking metal fitting, 63 ... Spring for urging single locking metal fitting, 64, 65 ... Inclined surface part, 67 ... Locking metal fitting pivot axis, 71 ... Left / right backlash prevention step, 72 ... Convex shape Fitting part, 73 ... Lock hole, 74 ... Lock support wall, 75 ... Pedal fitting, 76 ... Concave fitting part, 77 ... Pedal fitting base hole, 78 ... Convex fitting tip shaft Hole, 79 ... Axis, 82 ... Tip lower inclined surface, 83 ... Sliding lock fitting, 84 ... Extrusion spring for urging the lock fitting, 85 ... Long hole, 86 ... Slide button for unlocking.

Claims (5)

[Claims] 1. A pedal folding joint portion is provided at a tip of a crank arm, and a pedal joining shaft formed in a cross-sectional shape for joining to the concave fitting portion is meshed with a concave fitting portion of the pedal folding joint portion. A pedal which is pivotally attached to the crank arm at a right angle to the crank arm by inserting the pivot shaft into the base end side shaft hole of the pedal joint shaft and the joint portion shaft hole that matches the shaft hole. A folding device for a bicycle pedal adapted to be folded toward a crank arm as a fulcrum, wherein a locking mechanism locks a pedal joining shaft at a pedal folding joint portion of the crank arm so that the pedal is not folded during traveling. Incorporate
When the lock mechanism is unlocked, the pedal is configured to be automatically folded toward the crank arm by the rotational biasing force of the pedal jumping spring, and the lock mechanism is operated by one finger when the pedal is folded. It is configured as an automatic lock mechanism that can be easily unlocked by one-touch operation, and when the folding pedal is raised to a normal use state, it is automatically locked by the pressing action by the return rotation of the pedal joining shaft. A bicycle pedal folding device characterized by the above. 2. A lock mechanism having an arc-shaped fitting portion for holding a lock receiving round shaft portion of a pedal joint shaft, and an opening rotatably attached to a side wall notch portion of the pedal fold joint portion. Of the arm lock fitting that is biased by a spring in the direction, a tip fitting portion for locking the lock fitting that engages with the inner end fitting portion of the arm lock fitting in a disengageable manner, and the tip fitting portion. Rotating with a spring in the engaging direction of a lock fitting that has a stopper part for rotation limit that regulates the position of the latched state and is pivotally attached to the other side wall notch of the pedal folding joint part so that it can be rotated. 2. A safety lock fitting that is urged, and a lock release operating portion that rotates the safety lock fitting in the engagement / disengagement direction by a manual operation against a spring force. The bicycle pedal folding device described. 3. The pedal folding joint portion has both outer end hook portions engaged with the distal end side notches of the pedal joint shaft and inner end engaging portions with which lock guide pins are engaged. It has a pair of left and right arm lock fittings that are pivotally attached to the wall cutouts and are biased by springs in the opening direction, and lock guide pins that engage with the inner end engaging parts of each arm lock fitting. A pair of left and right lock guide plates which are adjacent to the arm lock fittings and are coaxially supported by a pivot shaft of the arm lock fittings, and a pair of left and right lock fitting plates which are fitted into the opposed spacing portions of the lock guide plates. A safety lock piece that can be moved in the insertion / removal direction to maintain the locked state of the guide plate and arm lock fittings, and this safety lock piece is pushed and moved from the fitting position between the lock guide plates to the unlocked position between the arm lock fittings. For unlocking And moving the operating shaft having a push button,
2. The bicycle according to claim 1, wherein the movement operation shaft is composed of a spring in which a safety lock piece is fitted between lock guide plates and a push button is urged to project to an operation position. Pedal folding device. 4. The lock mechanism has a tip hook portion that engages with a tip engaging portion of a pedal joint shaft, and is attached to the end of the concave fitting portion of the pedal folding joint portion such that the lock can be manually unlocked. Composed of a rotatable single locking metal member and a spring for biasing the single locking metal member to rotate in the locking direction,
When the folding pedal is raised to the normal use state, the tip of the lock fitting and the end of the pedal joint shaft are in contact with each other on a slope to automatically rotate the lock fitting to escape from the spring force. The bicycle pedal folding device according to claim 1, wherein an inclined surface portion for locking is provided. 5. An L-shaped pedal fold joint comprising a convex fitting portion having a step to prevent rattling from the left and right and a lock support wall having a lock hole is provided at the tip of the crank arm, and the pedal fold joint is formed. The concave fitting portion of the pedal joint fitting is fitted into the convex fitting portion of the above in a meshed state, and the base end side axial hole of this pedal joint fitting and the tip fitting axial hole of the convex fitting portion A folding device for a bicycle pedal, in which a pivot shaft is inserted into the crank arm, and a pedal pivotally attached at a right angle to the crank arm can be folded toward the crank arm side with the pivot shaft as a pivotal fulcrum. Pedal folding joint part A sliding type lock fitting having an inclined surface on the lower side of the tip fitted into the lock hole of the lock wall, and the tip of this fitting is partly protruding from the tip surface of the pedal joining fitting. With a lock push spring that biases the state A lock mechanism composed of a lock release slide button for retracting and moving the lock fitting against the spring force is incorporated, and when the lock mechanism is unlocked, the pedal is cranked by the rotational biasing force of the pedal jumping spring. A bicycle pedal folding device characterized in that it is automatically folded to the side.