JPH02127184A - Pedal folder for bicycle - Google Patents

Abstract

PURPOSE:To lock a pedal automatically at time of application by assembling a locking mechanism for locking a pedal joint shaft so as not to have the pedal folded during running, in a pedal folding joint of a crank arm. CONSTITUTION:When a folded pedal 10 is set upright into a normal service condition, a crank arm 1 is rotated so as to cause the pedal to be situated at the lower side and stopped, and in this state, when the pedal standing erect upward is tilted by one hand, an arm lock fitting 14 and a safety lock fitting 15 of a locking mechanism being an open state due to pressing action by return rotation of this pedal joint shaft 4 are rotated upward against each force of springs 22, 29. Then, when the crank arm 1, the pedal and the pedal joint shaft 4 has come to a right angle, the arm lock fitting 14 and the safety lock fitting 15 are engaged with each other, and thereby the arm lock fitting 14 firmly holds a lock receiver round shaft part 4a of the pedal joint shaft 4, so that an automatic lock for this pedal joint shaft 4 is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a bicycle pedal folding device that allows the pedals to be folded in the direction of the crank arm.

[Conventional technology]

Conventionally, the pedal folding device as mentioned above is a type in which the pedal body is folded (for example, the one
Japanese Utility Model Publication No. Sho 62-34877) and a system in which the entire pedal is folded from the pivot shaft support of the pedal joint shaft (for example, Japanese Utility Model Publication No. Sho 59-7184) are known.

[Problem to be solved by the invention]

Most of the conventional folding pedals require a one-two operation using both hands when folding, and cannot be considered a true one-touch operation. Also, Jikko No. 82-28304 and Jikko No. 8
In the case of the method of folding the pedal body as disclosed in Publication No. 2-34877, etc., the folding part is insufficient (about half the length of the pedal), and even in the folded state, there is a protruding part at the tip of the crank arm. has remained for a long time, and the purpose and function of folding pedals have not been fully fulfilled. On the other hand, even if the purpose and function of a folding pedal is considered to be close to that of a folding pedal (for example, the pedal folding device disclosed in Publication of Utility Model Publication No. 59-7184), there is a method for fixing the pedal when the crank arm and the pedal are at right angles. and insufficient load countermeasures,
There is some play in the folding mechanism, and overall it lacks practicality and feasibility.

In the case of this invention, without being limited only to the structure of folding pedals, the aim is to enable smooth entry and exit of bicycles in and out of parking lots during actual daily use, and also to ensure that the bicycle does not get in the way of walking while carrying the bicycle. Since this is a major objective, it was invented with an emphasis on practicality and feasibility. In developing this invention, we posed the following problems due to the characteristics of the pedal and tried to solve them.

■ When people ride a bicycle, they start with one leg, so 1
At least the weight of a human being is applied to each pedal.

■ When driving, the pedal rotates, and loads are applied to the joint between the crank arm and the pedals (folding mechanism part) from all directions, so when driving, loads are applied in the direction of folding the pedals as well. Therefore, there should be no looseness in the joint.

■ Some method must be taken to prevent the pedals from being accidentally folded while driving.

This invention was devised to solve all of the above-mentioned problems in structure-F and mechanics-1.The purpose of this invention is to be able to handle loads from all directions and not cause rattling. The pedals can be reliably locked to prevent them from being folded while driving, and when the pedals are folded, the lock can be easily unlocked with one hand or one or two fingers;
When the folding pedal is brought into normal use, it can be easily restored to its original position by stepping on it with one hand or foot, and at this time the locking mechanism is automatically activated to automatically lock the pedal. To provide a bicycle pedal folding device having many features such as a tatami mechanism part being compact and unobtrusive and having a neat appearance not much different from existing pedal mechanisms.

[Means to solve the problem]

In order to achieve the above object, the bicycle pedal folding device of the present invention is provided with a pedal folding joint at the tip of the crank arm, and a concave fitting part of the pedal folding joint. The pedal joint shafts formed in the cross-sectional shapes to be joined are fitted in a mating state, and the pivot is inserted into the base end shaft hole of the pedal joint shaft and the joint shaft hole that matches the shaft hole, and the crank arm is attached. The pedal, which is pivoted at right angles to the pedal, is configured so that it can be folded toward the crank arm using the pivot shaft as a rotation fulcrum, and the pedal is folded at the pedal folding joint of the crank arm while the pedal is traveling on the pedal joint shaft. The pedal is configured to incorporate a locking mechanism that locks the pedal so that it does not move, and when the locking mechanism is unlocked, the pedal is automatically folded toward the crank arm side by the rotational biasing force of a spring for lifting the pedal. This is a characteristic feature.

The locking mechanism can be easily unlocked with a one-touch operation using one finger when the pedal is folded, and when the folding pedal is returned to normal use, it is automatically locked by the pressure action of the return rotation of the pedal joint shaft. As long as it is an automatic locking mechanism that locks automatically, it is possible to apply various structures, but the first structure that is practically preferable for this locking mechanism is particularly suitable for adults who place a large load on the pedal part. A structure suitable for bicycles, etc. includes an arc-shaped fitting part that holds the lock receiving round shaft part of the pedal joint shaft, and is pivotally attached to a notch in one side wall of the pedal folding joint part so as to be openable and closable. An arm lock fitting that is rotationally biased by a spring in the opening direction, a tip engaging portion for hooking the lock fitting that removably engages with an inner end hooking portion of the arm lock fitting, and the tip engaging portion. The lock fitting has a rotation limit stopper portion for positionally restricting the locked state of the pedal, and is rotated by a spring in the engagement direction of the lock fitting which is pivoted to the other side wall notch of the pedal folding joint so that it can be rotated to engage and disengage. It is preferable that the safety lock fitting is configured to include a dynamically biased safety lock fitting and a lock release operation portion that manually rotates the safety lock fitting in an engagement/disengagement direction against a spring force.

Further, a practically preferable second structure of the locking mechanism,
Particularly suitable for adult bicycles, etc., where a large load is applied to the pedal part similar to the above, the outer end hook is engaged with the notches on both sides of the tip of the pedal joint shaft, and the inner end is engaged with the lock guiding pin. A pair of left and right arm lock fittings each having an engaging portion and rotatably biased in the opening direction by a spring, which are rotatably pivoted to the notches on both sides of the pedal folding joint, and each of the arm lock fittings a pair of left and right lock guiding plates, each having a lock guiding pin that engages with the inner end engaging portion, and which are adjacent to the arm lock fitting and are coaxially supported on a pivot shaft of the arm lock fitting; A safety lock piece that is movable in the insertion/detachment direction to maintain the locked state of the pair of left and right lock guide plates and arm lock metal fittings by fitting into the opposing gap between the guide plates, and a safety lock piece that fits between the lock guide plates. A moving operation shaft with a push button for unlocking the arm to be pushed and moved from the position to the unlocking position between the arm lock fittings, and a safety lock piece fits between the lock guiding plates and the push button is in the operating position. It is preferable to include a spring that urges the spring to protrude.

Furthermore, a third practically preferable structure of the locking mechanism suitable for children's bicycles and the like in which a large load is not applied to the pedal portion is such that the locking mechanism has a tip hook that engages with a tip latching portion of a pedal joint shaft. a rotatable single locking fitting having a portion and pivotally attached to an end of the concave fitting portion of the pedal folding joint for manual unlocking; and rotating the single locking fitting in a locking direction. The biasing spring is shaped like a bell and comes into sloping contact with the hook at the tip of the lock fitting and the hook at the tip of the pedal joint shaft when the folding pedal is raised to normal use, causing the lock fitting to resist the spring force. It is also possible to use a simple locking structure that includes an inclined surface portion for automatic locking that allows the locking device to rotate outwardly.

Furthermore, as mentioned above, a pedal folding device that has a relatively simple structure and is suitable for children's bicycles and other devices that do not place too much load on the pedals is a convex pedal folding device that has a step at the end of the crank arm to prevent left and right rattling. A wedge-shaped pedal folding joint is provided, which consists of a fitting part and a lock support wall with a lock hole, and a concave fitting part of the pedal joint fitting is engaged with the convex fitting part of the pedal folding joint. By fitting the pivot into the proximal shaft hole of this pedal joint fitting and the shaft hole at the tip of the convex fitting part that matches the shaft hole, the pedal is pivoted at right angles to the crank arm. The pedal joint fitting is configured to be foldable toward the crank arm side using the pivot as a rotational fulcrum, and the pedal joint fitting includes a sliding lock fitting having an inclined surface on the lower side of the tip that fits into a lock hole of a lock wall of the pedal folding joint portion. , a lock extrusion spring that biases the locking fitting so that the tip of the locking fitting partially protrudes from the distal end surface of the pedal connecting fitting; and a lock release slide button that moves the locking fitting in and out against the spring force. It is also possible to apply a structure in which a locking mechanism consisting of is incorporated, and when the locking mechanism is unlocked, the pedal is automatically folded toward the crank arm side by the rotational biasing force of the pedal-up spring. .

[Effect]

By applying the extremely practical and highly feasible pedal folding device z to bicycle pedals, the pedals will no longer become a nuisance during transport from the factory, display at stores, or even when entering and exiting bicycle parking lots. This makes storage easier and prevents problems such as pedals getting caught and knocking over neighboring bicycles. Therefore, bicycles can be parked in an orderly manner in public areas such as in front of stations and on sidewalks, contributing to traffic safety and city beautification.

Furthermore, even when the user carries the bicycle under his arm while walking, he does not have to worry about the pedals, so he can carry it easily and safely.

On the other hand, by mass producing the folding device, costs can be reduced, and by introducing it to the market, it will encourage replacement demand and revitalize the industry and market, so it also has a high social value.

〔Example〕

A first embodiment of the present invention will be specifically described below with reference to FIGS. 1 to 7. This embodiment shows a pedal folding device suitable for bicycles for adults where a large load is applied to the pedal portion.This pedal folding device has a pedal folding joint 2 at the tip of a crank arm 1, A pedal joint shaft 4 formed in a cross-sectional shape to be joined to the concave fitting part 3 is fitted into a U-shaped concave fitting part 3 opening in the crank arm extension direction of the joint part 2 in an interlocking state,
The base end side shaft hole 5 of this pedal joint shaft 4 and the pedal folding joint portion side walls 3a that match the shaft hole 5.

By fitting the pivot 7 into the tip shaft hole 6 of the crank arm 3b and fixing the pivot 7 with the cap nut 8 through the washers 8a and 8b, the pedal lO, which is pivoted at right angles to the crank arm 1, can be attached to the pivot. It is constructed so that it can be folded toward the crank arm 1 side as shown in FIG. 6, using 7 as a rotation fulcrum.

The pedal 10 is connected to the pedal joint shaft 4 by a screw-in type pedal receiver 9 as shown in FIG. It can be rotated. Further, on the lower surface of the distal end side of the pedal folding joint 2 located below the pivot 7, a cutout hole 12 having a planar U-shape that enables the pedal to be folded as described above is provided as shown in FIG. .

The pedal folding joint 2 of the crank arm 1 is equipped with a locking mechanism 13 that locks the pedal joint shaft 4 to prevent the pedal 10 from being folded during driving. When the lock is released, the pedal 10 is automatically folded toward the crank arm 1 side by the rotation urging force of the pedal lifting spring 11. The pair of torsion springs 11 are embedded in the contact area between the side walls 3a, 3b of the pedal folding joint 2 and both sides of the pedal joint shaft 4. The spring wire portion 11a extending from one end is inserted and fixed into the spring grooves 5a on both sides of the pedal joint shaft 4, and the spring wire portion itb extending from the other end is connected to the side walls 3a, 3.
It is fitted and fixed into the inner spring groove 6a of b.

The locking mechanism 13 can be easily unlocked by a one-touch operation with a finger of one hand when the pedal is folded, and when the folding pedal 10 is raised in normal use, the locking mechanism 13 is locked by the pressing action of the return rotation of the pedal joint shaft 4. The mechanism is configured as an automatic locking mechanism that automatically locks when the pedal is connected to the pedal.
An openable and closable arm lock fitting 1 having a fitting part 14a.
4, and a tip engaging portion 15 for locking the arm lock fitting 14, which removably engages with the inner end hooking portion 14b of the arm lock fitting 14.
a and the arm lock fitting 14 of the tip engaging portion 15a.
A rotatable safety lock fitting 15 having a rotation limit stopper portion +5b that restricts the position of the locked state, and a lock release operation portion that manually rotates the safety lock fitting 15 in the engagement/disengagement direction. It consists of a lock release button 16 as a.

To explain further, the arm lock fitting 14 is attached to the arm lock fixing bolt 18 (this bolt is connected to the notch communication hole 1 between the joint part and the side wall 3a) in the notch part (7) of one side wall of the pedal folding joint part 2.
9 into the pivot hole 20 of the arm lock fitting I4, and is attached by screwing the threaded end portion into the notch wall screw hole 21), and is pivoted so that it can be opened and closed, and is rotated by a torsion spring 22 in the opening direction. energized. The torsion spring 22 is configured such that one end of the extending spring wire portion is embedded in the back spring groove 23 of the arm lock fitting 14, and the other end of the extending spring wire portion is embedded in the wall spring groove (not shown) of the notch portion 17. The arm lock fitting 14 is fitted and fixed, and rotated so that when the arm lock fitting 14 is unlocked, the tip comes into contact with the upper jaw 24a of the other side wall notch 24 of the pedal folding joint 2, as shown in FIG. 5(c). It is dynamically energized.

The safety lock fitting 5 is inserted into the other side wall notch 24 of the pedal folding joint 2 with a safety lock fixing bolt 25 (this bolt is inserted into the pivot hole 27 of the safety lock fitting 15 from the notch communication hole 2B of the other side wall 3b of the joint). It is attached by screwing the threaded end into the cutout wall screw hole 28), and is pivoted so that it can be rotated to engage and disengage, and is biased to rotate in the direction of engagement with the arm lock fitting 14 by a torsion spring 29. has been done.

Similar to the torsion spring 22 of the arm lock fitting 14, this torsion spring 29 has a spring wire portion extending from one end of the safety lock fitting 14.
The other end of the extending spring wire portion is fitted and fixed so as to be embedded in the wall spring groove (not shown) of the cutout portion 24, and the stopper portion 15b of the safety lock fitting 15 is inserted into the other side wall. It is urged to rotate so as to come into contact with the upper inner surface 24b of the notch 24 as shown in FIG. The lock release button 16 that rotates the safety lock fitting 15 in the engagement/disengagement direction against the force of the spring 29 has its shaft 16a connected to the notch communication formed in the end wall of the pedal folding joint 2. The shaft is inserted into the guide groove 2a of the circular arc elongated hole centered on the hole 26, and the threaded end of this shaft is inserted into the threaded end hole 15c of the safety lock fitting 15.
It is fixedly attached to the safety lock fitting 15 by screwing it on.

2 to 4 show a state in which the pedal 10 and the pedal connecting shaft 4 are locked by the locking mechanism 13 so as to be perpendicular to the crank arm 1, and in this locked state, the arm locking metal 14 holds the lock receiving round shaft portion 4a of the pedal joint shaft 4 as shown in FIG. 4, and the inner end latching portion of this arm lock fitting I4! 4b of the safety lock fitting 15 engages with the end engaging portion 15a of the safety lock fitting 15, and the stopper portion 15b of the safety lock fitting 15 comes into contact with the upper inner surface portion 24b of the other side wall notch 24 which is at the rotation limit restriction position. The arm lock fitting 14 is prevented from rotating in the opening direction (unlocking direction), thereby preventing the pedal IO from being accidentally folded while driving.

In this case, the contact surface indicated by T-T' in Figure 1 generates a lever principle using the pedal pivot 7 as a fulcrum, and a large load acts in the W direction (acts when the crank arm 1 rotates directly downward). load). By the way, the load applied from the X direction in Figure 3 (the load that acts when the crank arm 1 rotates directly upwards) is light in practical use, and the entire weight of the user is not applied to it, so the above-mentioned lock Locking by the mechanism 13 can sufficiently deal with the problem mechanically. Also, both side walls 3a of the pedal joint portion 2.

3b is connected to both side surfaces of the pedal joint shaft 4, and serves to prevent rattling and reinforce the pedal joint portion in the left and right direction.

When folding the pedal 10 as necessary, when the pedal is in the locked state as shown in FIGS. 2 to 4, the lock release button 16 is pushed down by hand along the guide groove 2a. By pressing down the lock release button 16, the safety lock fitting 15 is released from the state shown in FIG. 5(a) to the state shown in FIG. As a result, the latching state of the arm lock fitting 14 is released, and 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 rotated by the rotation biasing force of the spring 11. The force causes it to flip up and rotate as shown in Figure 5 (C). and,
When the distal end of the arm lock fitting 14 comes into contact with the jaw 24a in the open stop state shown in FIG. The pedal lO is rotated in the folding direction by the rotation urging force of No. 11, and thereby the pedal lO is
As shown in the figure, it is folded along the side of the crank arm 1 so as not to get in the way. At this time, when the safety lock fitting 15 is released from the lock release button 16, the force of the spring 29 returns to the original state as shown in FIG. It comes to stand by at the lower position of the arm lock fitting 4 which is in a state where it can accept the pedal joint shaft 4 of 10.

Therefore, when the folding pedal 10 is raised to the normal use state as shown in FIG. 6, the crank arm 1 is stopped rotating as shown in FIG. 7 so that the pedal 10 is positioned on the lower side. In this state, if the pedal 10 (only the pedal joint shaft 4 is shown in FIG. 7 and the pedal 10 is omitted), which is standing upward, is pushed down with one hand or stepped down with the foot,
Due to the pressing action caused by the return rotation of the pedal joint shaft 4, the arm lock fitting 14 and the safety lock fitting 15 in the open state (pedal joint shaft receiving state) resist the force of the spring 22.29, as shown in FIG. 7(a). The arm lock fitting 14 is pushed up and rotated from the state shown in FIG. 6 to the state shown in FIG.
and the safety lock fitting 15 are engaged as shown in FIG. 7(c),
The arm lock fitting 15 firmly holds the lock receiving round shaft portion 4a of the pedal joint shaft 4, and
automatic locking will be completed.

Next, a second embodiment of the present invention will be described with reference to FIGS. 8 to 14. This embodiment shows a pedal folding device suitable for bicycles for adults where a large load is placed on the pedals. A pedal joint shaft 4 formed in a substantially rectangular cross-sectional shape and connected to the concave fitting part 3 is fitted into a concave fitting part 3 of the pedal folding joint part 2 that is open in the crank arm extension direction in an engaged state. , the proximal shaft hole 5 of this pedal joint shaft 4 and the shaft hole 5
Pedal folding joint side walls 3a that match.

By fitting the pivot shaft 7 into the tip shaft hole 6 of the crank arm 3b and fixing the pivot shaft 7 with a nut 8' through the washer 8a, the pedal lO, which is pivoted at right angles to the crank arm 1, can be attached to the pivot shaft 7. The pedal joint shaft 4 is configured so that it can be folded toward the crank arm 1 side as a rotational fulcrum, and the pedal 10 can freely rotate around the axis by a bearing built into the central shaft (not shown) of the pedal receiver 9. The pedal holder 9 is screwed onto the proximal end protruding screw 32 as shown in FIG. 9 so that it can be rotated.
, the pivot point 7 of said pedal folding joint 2
As shown in FIG. 9, a flat notch hole 12 is provided on the lower surface of the distal end side of the crank arm 1 to enable the pedal to be folded, as shown in FIG. The locking mechanism 13 that locks the pedal joint shaft 4 to prevent the pedal IO from being folded is incorporated, and when the locking mechanism 13 is unlocked, the pedal IO exerts a rotation biasing force on the pedal lifting leaf spring 11'. (However, this pedal-lifting leaf spring 11' has a curved part lie that is inserted into the central spring hook of the pivot 7.) One end of the spring plate portion lid extends from the lower recess 3 of the pedal joint shaft 4.
1 as shown in FIG. 9, and the other end extending spring plate part 110 is incorporated so as to be fitted into the inner bottom spring groove 6b of the recessed fitting part 3). The first
The locking mechanism 13 is substantially the same as the pedal folding device of the first embodiment shown in FIGS.
The configuration of is explained below.

The locking mechanism 13 in this second embodiment can be easily unlocked by a one-touch operation with one finger when the pedal is folded, and when the folding pedal 10 is raised to normal use, the pedal joint shaft 4 can be rotated back. It is similar to the first embodiment in that it is structured as an automatic locking mechanism that is locked by the pressing action of the pedal and automatically enters the locked state. Outer end hook portion 33a engaged with portions 4b and 4c
, 34a and a pair of left and right arm lock fittings 33, 34 having inner end engaging portions 33b, 34b to which lock guide pins 35, 36 are engaged, and the inner ends of each of the arm lock fittings 33, 34, which can be opened and closed. Engagement parts 33b, 34b
A pair of rotatable left and right lock guide plates 37.38 having lock guide pins 35,36 that engage with the lock guide plates 37, 36, and a pair of left and right lock guide plates 37 that fit into the opposing spacing of the lock guide plates 37,38. A safety lock piece 39 is movable in the insertion/removal direction to maintain the locked state of the arm lock fittings 33 and 38, and the safety lock piece 39 is assembled into the lock piece from the insertion position between the lock guide plates 37 and 38. recess 56
a moving operation shaft 4 having a push button 40 for unlocking that is guided by a guide surface 56a (see FIG. 9) for lock chest rotation prevention and pushed and moved to an unlocking position between arm lock fittings 33 and 34; The movable operating shaft 4 is comprised of springs 42 and 43 that bias the safety lock piece 39 so that it fits between the lock guide plates 37 and 38 and pushes the push button 40 to the operating position.

To explain further, the arm lock fittings 33, 34 are attached to the arm lock fixing bolts 4 (i, 47) in the notches 44, 45 of the side walls of the pedal folding joint 2 (these bolts are connected to the notches of the joint side walls 3a, 3b). Pivot holes 37c and 38c of lock guiding plates 37 and 38 and pivot holes 33c of arm lock fittings 33 and 34, which will be described later, from holes 48 and 49,
34c, and the tip screw part is inserted into the notch wall screw hole 4.
4a.

45a (attached by screwing in) so that it can be opened and closed, and is biased to rotate in the opening direction by a pair of left and right torsion springs 50 and 51. In addition, this torsion spring 50.
51 has an arm lock fitting 33 and 34 whose spring wire part extends from one end.
The arm lock fitting 33.3 is embedded in a front spring groove (not shown) of the arm lock fitting 33.
4 is rotated and biased to open as shown in FIG.

The lock guide plates 37 and 38 have pivot holes 37 that match the pivot holes 33c and 34c of the arm lock fittings 33 and 34.
C138e and bottle fitting holes 37b and 38b for fixing the lock guiding pin 35.38, and the arm lock fitting 33.3 is adjacent to the arm lock fitting 33.34.
Arm lock fixing bolt 46.47 which is the rotation support shaft of 4
It is coaxially mounted. In addition, this lock guide plate 3
A tension spring 53 is stretched between the ends of the 7° 38 so that the lock guide plate 37, 38 rotates to open and close in conjunction with the arm lock fitting 33, 34. Further, the moving operation shaft 41 has a threaded end portion 41b on which the push button 40 is screwed.
It has an intermediate screw portion 41a that is screwed into the center screw hole 39a of the safety lock piece 39, and the lock piece is assembled through the center communication hole 5G of the button insertion hole 55 formed in the end wall of the pedal folding joint portion 2. The intermediate threaded portion 41a is inserted into the recess 58, screwed into the center screw hole 39a of the safety lock piece 39 located within the recess 56, and the protruding shaft portion is inserted into the coil spring 4.
By fitting the safety lock piece 39 into the inner insertion hole 57 of No. 3 as shown in FIG. is biased so as to come into contact with.

9 to 11 show a state in which the pedal IO and the pedal connecting shaft 4 are locked by the lock mechanism 13 so as to be perpendicular to the crank arm 1, and in this locked state, the arm lock metal 33°34 tip hook part 3
3a and 34a are notches 4 at both ends of the pedal joint shaft 4.
b, 4c are engaged as shown in FIG. 11, and the lock guide plates 37, 38, which are interlocked with the arm lock fittings 33, 34 of the R and lock guide pins 35, 36, are locked by the insertion of the safety lock piece 39. , the arm lock fitting 33.
34 is prevented from rotating in the opening direction (unlocking direction), thereby preventing the pedal IO from being accidentally folded while driving. In this case, the contact surface S between the pedal joint shaft 4 and the concave fitting portion 3 shown in FIG. Also, by connecting both side walls 3a, 3b of the pedal joint part 2 with both side surfaces of the pedal joint shaft 4, the pedal joint part is prevented from wobbling in the left and right direction. It will act as a reinforcement.

When folding the pedal 10 as necessary, the push button 40 for unlocking is pressed by the spring 42.in the pedal locked state as shown in FIGS.
When the push operation is performed against the elasticity of the lock member 43, the safety lock piece 39 is pushed against the lock guiding plate 37, 38.
The lock guide plate 37.38 is released from the latched state and the arm lock fitting 33.34 is rotated. The lock guide plate 37,38 is opened by the dynamic biasing spring 50.51 and the lock guide plate 37,38 is moved by the force of the tension spring 53 and the lock guide pin 35. The pedal 10 is rotated closed as shown in FIG. 13 by the interlocking movement of the pedal H, and the pedal joint shaft 4 is flipped up and rotated by the rotation biasing force of the pedal lifting spring 11, so that the pedal 10 is rotated as shown in FIG. It will be folded into almost the same state as the current state. At this time, the safety lock piece 39 is pressed against the back side of the lock guide plate 37.38 in the closed state by the biasing force of the subrig 42.43, as shown in FIG. 13, and the lock guide plate 37.38 is in the open state. As shown in FIG. 13, a part of the arm lock fittings 33 and 34 is exposed and stands by.

Therefore, when the folding pedal 10 folded as described above is raised to the normal use state, the crank arm 1 is placed so that the pedal 10 is positioned on the lower side, as in the case described in the first embodiment. As shown in Fig. 14, if the pedal 10 is stopped in its rotational state as shown in Fig. 14, and the pedal 1O, which is standing upwards, is pushed down with one hand or depressed with the foot in the direction shown by arrow A in Fig. 14, this pedal joint axis The arm lock fitting 3 is in the open state (pedal joint bearing receiving state) due to the pressing action caused by the return rotation of step 4.
3.34 receives the pedal joint shaft 4, thereby pushing up and rotating the lock guide plate 37.38, and in conjunction with the lock guide pin 35.3[i, the arm lock fitting 33.3.
34 is closed to lock said pedal joint shaft 4.

Then, when the pedal joint shaft 4 becomes perpendicular to the crank arm 1, the lock guide plates 37, 38 are pushed into the space (opposing distance In this state, the safety lock piece 39, which is biased by the springs 42 and 43, moves toward the lock guiding plate 3.
7.38, the automatic locking as shown in FIGS. 9 to 11 is 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, etc., in which no large load is applied to the pedal portion). The locking mechanism 13 has a tip hook portion 61 that engages with the tip latching portion 4d of the pedal joint shaft 4, and has a locking metal fitting at the end of the concave fitting portion 3 of the pedal folding joint portion 2 so that the lock can be released by manual operation. A rotatable single lock fitting 62 that is pivoted by a pivot 67 (the pivot 67 of this lock fitting is connected to the shaft hole 68 of the joint side walls 3a, 3b and the lock fitting 6).
2) and a spring 63 that biases the single lock fitting 62 to rotate in the locking direction.
When the folding pedal 10 is raised to the normal use state, the tip hook portion 61 of the pedal joint shaft 4 comes into contact with the tip hook portion 4d of the pedal joint shaft 4, and the lock fitting 62 is moved against the elasticity of the spring 63 into the 18th As shown in Figure (b), the automatic locking inclined surface part [14, 85] is configured as a simple opening and opening structure that allows the automatic locking to rotate outward, and the operating state when the lock is released is shown in Figure 16. The folded state of the pedal 10 is shown in FIG.
The operating state when this folding pedal 10 is raised to the normal use state is as shown in FIG.
Other configuration explanations and operation explanations will be omitted.

FIGS. 19 to 22 show a pedal folding device suitable for children's bicycles, etc., in which the pedal portion does not have a large load, similar to the third embodiment (the embodiment shown in FIGS. 15 to 18). This pedal folding device shows a practically preferable fourth embodiment, and this pedal folding device has a convex fitting part 72 with a step 71 to prevent left and right rattling at the tip of the crank arm 1.
and a lock support wall 74 with a lock hole 73, an L-shaped pedal folding joint 2 is provided, and a convex fitting portion 72 of the pedal folding joint 2 is fitted with a concave fitting portion of a pedal joint fitting 75. 76 in an engaged state, and the pivot 79 is fitted into the proximal shaft hole 77 of this pedal joint fitting 75 and the distal shaft hole 78 of the convex fitting part 72 that matches the shaft hole, and the pivot 79 washer 8
0 and a nut 81, the pedal 10, which is pivoted at right angles to the crank arm 1, is fixed to the pivot shaft 7.
The pedal joint fitting 75 has a lower end portion which fits into the lock hole 73 of the lock wall 74 of the pedal folding joint portion lock wall 74. A sliding lock fitting 83 having an inclined surface 82, a lock extrusion spring 84 that biases the lock fitting 83 so that the tip of the fitting partially protrudes from the distal end surface of the pedal joint fitting 75, and the lock fitting 83. A lock mechanism 13 consisting of a lock release slide button 86 that is movable back and forth along an elongated hole 85 for moving the lock member 83 in and out against spring force is incorporated, and when the lock mechanism 13 is released, the pedal lO is Lifting leaf spring 11'
It is configured so that it is automatically folded toward the crank arm 1 side by the rotation urging force of.

The leaf spring 11' has a bending curved part 11c that is fitted into the pivot shaft 79 of the pedal joint fitting 75, and its lower end extending spring plate part 11d is fitted into the inner spring groove 88 of the recessed part of the pedal joint fitting 75. 17, the other end extending spring plate part lie is fitted into the -1 plane spring groove 87 of the convex fitting part 72 and assembled as shown in FIG. It is slidably fitted into a lock fitting insertion hole 75a of the pedal joint fitting 75 so that it can be moved in and out by a sliding operation.

In this embodiment, when the pedal 10 is folded, when the lock release slide button 86 is slid to the right as shown in FIG. 21 (b) against the elasticity of 84.
), whereby the tip of the lock fitting 83 is removed from the lock hole 73 and unlocked. Then, the pedal joint fitting 75 is flipped up into a state as shown in FIG. 21(C) by the elasticity of the leaf spring 11', and the pedal IO is folded toward the crank arm 1 side.

In addition, when raising the folding pedal 10 to return it to its original operating state, press down on the pedal 10 with one hand or foot while the crank arm 1 is stopped rotating directly below, and this pedal lO is It falls down and rotates in the direction shown by arrow A in (a), and the tip inclined surface 82 of the sliding lock fitting 83 comes into contact with the tip of the lock support wall 74 as shown in FIG. The lock fitting 83 is connected to the spring 8.
It is pushed back against the elasticity of 4. And the pedal I
When O becomes perpendicular to the crank arm 1, the lock fitting 83 is pushed out by the spring force, and its tip engages with the lock hole 73 as shown in FIG. 22(C), completing the locking. become.

〔Effect of the invention〕

Since the bicycle pedal folding device of the present invention has the above-described configuration, it has the following excellent effects.

(1) The pedal joint can handle loads from all directions and does not cause rattling.

(2) The pedals can be reliably locked to prevent them from being folded while driving, and when the pedals are folded, they can be easily unlocked with one hand or one or two fingers.

(3) When raising the folding pedal to normal use, it can be easily restored to its original position by stepping on it with one hand or foot, and at this time the locking mechanism automatically operates to automatically lock the pedal. can.

(4) The folding mechanism is compact and does not get in the way, and has a clean appearance that is not much different from existing pedal mechanisms.

(5) Therefore, by applying the highly practical and feasible pedal folding device as described above to bicycle pedals, it can be easily transported from the factory, displayed at a store, and even taken in and out of a bicycle parking lot. The pedals do not get in the way and can be stored smoothly, and the problem of the pedals getting caught and knocking over the bicycle next to you can be prevented. This allows bicycles to be parked in an orderly manner in public areas such as in front of stations and on sidewalks, contributing to traffic safety and city beautification. Furthermore, even when the user carries the bicycle under his arm while walking, he does not have to worry about the pedals, so he can carry it easily and safely.

(6) On the other hand, by mass-producing the folding device to reduce costs and introducing it to the market,
It also has a high social value, as it stimulates replacement demand and revitalizes the industry and market.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of the main parts of a bicycle pedal folding device according to a first embodiment of the present invention, and FIG. 2 is a crank arm tip portion (pedal joint portion) of the pedal folding device in an assembled state. Figure 3 is the back view of Figure 2.
- Central longitudinal sectional view along line ■, Figure 4 is IV-I of Figure 3.
5(a) to (c) are operation explanatory diagrams showing the operating state when the pedal is folded, and FIG. 6 is a rear view and a side view of the pedal in the folded state. The explanatory diagrams shown in FIGS. 7A to 7C are operation explanatory diagrams showing the operating state when the folding pedal is raised to the normal use state, and FIG. FIG. 9 is an exploded perspective view of the main parts of the related bicycle pedal folding device; FIG. 9 is a central vertical sectional view of the crank arm tip portion (pedal joint portion) of the pedal folding device in the assembled state; FIG. 1O is FIG. left side view of
Fig. 11 is a sectional view taken along the v-v line in Fig. 9;
13 and 13 are operation explanatory diagrams showing the operating state when the pedal is folded, FIG. 14 is an operational explanatory diagram showing the operating state when the folding pedal is raised to the normal use state, and FIG. 16(a) to 16(C) are exploded perspective views of the main parts of a bicycle pedal folding device according to a third embodiment of the invention, and schematically show the operating state of the pedal folding device when the pedals are folded. FIG. 17 is a side view of the main part showing the pedal in the folded state, FIG. 18 is an action explanatory diagram schematically showing the operating state when the folding pedal is raised to the normal use state, 1st
9 is an exploded perspective view of the main parts of a bicycle pedal folding device according to a fourth embodiment of the present invention, FIG. 20 is a perspective view of the main parts of the same pedal folding device in a pedal folded state, and FIG. The figure is an operation explanatory diagram schematically showing the operating state of the pedal folding device when the pedal is folded, and Fig. 22 is an operational explanation schematically showing the operating state when the folding pedal is raised to the normal use state. It is a diagram. 1... Crank arm, 2... Pedal folding joint,
3... Concave fitting part, 3a, 3b... Both side walls of pedal folding joint part, 4... Pedal joint shaft, 4a... Lock receiver round shaft part, 4b, 4c... Pedal joint Notches on both sides at the tip of the shaft, 4d... Latching portion at the same tip, 5... Base end side shaft hole of the pedal joint shaft, 6... Joint shaft hole, 7... Pivot, 10... Pedal, 11°+1'... Spring for lifting the pedal, 13... Lock mechanism, 14... Arm lock fitting, 14a... Arc-shaped fitting part, 14b...
・Inner end latching part, 15...safety lock fitting, 15a...
・Tip engagement part, 15b...stopper part, 16...lock release button, 17...-side wall notch, 18...arm lock fixing bolt, 22...arm lock fitting rotation included 24...Other side wall notch, 25...Safety lock fixing bolt, 29...Rotation biasing spring for safety lock fitting, 33.34...Pair of left and right arm lock fittings, 33a, 34a...outer end hook, 33b, 3
4b...Inner end engaging portion, 35.36...Lock guide pin, 37.38...Lock rust guide plate, 39...Safety lock piece, 40...Push button, 41... Movement operation axis, 42. 43... Spring for urging movement operation axis, 4
4.45...Both side wall notches, 48.4795. Arm lock fixing bolt, 50. 51... Rotation biasing spring for arm lock fitting, 61... Tip hook, 62... Single lock fitting, 63... Single lock fitting biasing spring. Spring, 64. 65... Inclined surface portion, 67... Lock metal fitting pivot, 71... Right and left rattling prevention step, 72...
Convex fitting part, 73... Lock hole, 74... Lock support wall, 75... Pedal joint fitting, 76... Concave fitting part, 77... Proximal shaft of pedal fitting fitting Hole, 78...
Tip shaft hole of convex fitting part, 79... Pivot, 82... Tip lower inclined surface, 83... Slide type lock fitting, 84
...Extrusion spring for biasing the lock fitting, 85...
- Long hole, 86...Slide button for unlocking.

Claims (5)

[Claims] (1) A pedal folding joint is provided at the tip of the crank arm, and a pedal joint shaft formed in a cross-sectional shape that joins the concave fitting part is fitted into the concave fitting part of the pedal folding joint in an engaged state. and insert the pivot into the proximal shaft hole of the pedal joint shaft and the joint shaft hole that matches the shaft hole, so that the pedal, which is pivoted at right angles to the crank arm, uses the pivot as a pivot point. A bicycle pedal folding device that can be folded toward the crank arm side, wherein a locking mechanism is installed at the pedal folding joint of the crank arm to prevent the pedal from being folded while traveling on the pedal joint shaft. In particular, when the lock mechanism is unlocked, the pedal is configured to be automatically folded toward the crank arm side by the rotation biasing force of a spring for lifting the pedal, and the lock mechanism is configured such that when the pedal is folded, An automatic locking mechanism that can be easily unlocked with a one-touch operation using a finger of one hand, and that when the folding pedal is brought up to normal use, it is locked by the pressure action of the return rotation of the pedal joint shaft and automatically enters the locked state. A bicycle pedal folding device characterized in that it is configured as follows. (2) The locking mechanism has an arc-shaped fitting part that holds the lock receiving round shaft part of the pedal joint shaft, and is pivotally attached to a notch in one side wall of the pedal folding joint part so as to be openable and closable. An arm lock fitting that is rotationally biased by a spring, a tip engaging portion for hooking the lock fitting that removably engages with an inner end hooking portion of the arm lock fitting, and a hooking portion of the tip engaging portion. The locking metal fitting has a stopper part for limiting rotation to restrict the position of the pedal, and is pivoted to the other side wall notch of the pedal folding joint so that it can be rotated in the direction of engaging the locking metal fitting. 2. The safety lock fitting according to claim 1, comprising a safety lock fitting, and a lock release operation section for manually rotating the safety lock fitting in an engagement/disengagement direction against a spring force. Bicycle pedal folding device. (3) The locking mechanism has an outer end hook that is engaged with notches on both sides of the distal end of the pedal joint shaft, and an inner end engaging portion that is engaged with the lock guide pin, and a notch on both sides of the pedal folding joint. A pair of left and right arm lock fittings are rotatably biased in the opening direction by a spring and are pivotally connected to the arm locking fittings so as to be openable and closable. a pair of left and right lock guide plates adjacent to the arm lock fitting and coaxially supported on the rotational shaft of the arm lock fitting;
A safety lock piece that is movable in the insertion/detachment direction is inserted into the opposing gap between the lock guide plates to maintain the locked state of the pair of left and right lock guide plates and the arm lock fitting, and the safety lock piece is inserted between the lock guide plates. A moving operating shaft has a push button for unlocking that is pushed from the inserted position to the unlocking position between the arm lock fittings, and a safety lock piece fits this moving operating shaft between the lock guide plates and the push button is 2. The bicycle pedal folding device according to claim 1, further comprising a spring that urges the pedal to protrude to the operating position. (4) The locking mechanism has a tip hook portion that engages with the tip latching portion of the pedal joint shaft, and is pivoted to the end of the concave fitting portion of the pedal folding joint portion so as to be unlockable by manual operation. It consists of a rotatable single locking metal fitting and a spring that biases the single locking metal fitting to rotate in the locking direction.
When the folding pedal is raised to normal use, it may come into contact with the slope.
2. The pedal folding device for a bicycle rotating table according to claim 1, further comprising an inclined surface portion for automatic locking, which rotates the lock fitting outwardly against a spring force. (5) An L-shaped pedal folding joint is provided at the tip of the crank arm, consisting of a convex fitting part with a step to prevent left and right rattling, and a lock support wall with a lock hole. The concave fitting part of the pedal joint fitting is fitted into the shaped fitting part in a mating state, and the convex fitting part is pivoted into the proximal shaft hole of the pedal joint fitting and the tip shaft hole of the convex fitting part which matches the shaft hole. Insert the
A bicycle pedal folding device in which a pedal pivoted perpendicularly to a crank arm can be folded toward the crank arm using the pivot as a rotation fulcrum, the pedal folding joint locking wall being attached to the pedal joint fitting. A sliding lock fitting with a sloped surface on the lower side of the tip that fits into the lock hole of the pedal, and a lock extrusion that biases the lock fitting into a state where the tip of the lock fitting partially protrudes from the tip surface of the pedal joint fitting. A locking mechanism consisting of a spring and an unlocking slide button that moves the locking fitting in and out against the spring force is incorporated, and when the locking mechanism is unlocked, the pedal is activated by the rotation biasing force of the spring for lifting the pedal. A bicycle pedal folding device characterized in that the bicycle pedal folding device is configured to be automatically folded toward the crank arm side.