Bicycle pedal attachment / detachment unit and bicycle

Abstract

To provide a bicycle in which looseness of a chain can be adjusted by a simple method in the bicycle for training with an attachable / detachable pedal unit.SOLUTION: A pedal attachment / detachment unit 100 for bicycle, which detachably connects a pedal crank to a bicycle body, comprises: a unit body which rotatably holds the pedal crank to which a chain wheel 11 is attached, and has a unit connection part for connection to the bicycle body 10; and a unit reception part which is fixedly installed on the bicycle body and is connected to the unit connection part. The unit reception part and the unit connection part is equipped with a slide adjustment mechanism which changes and fixes mutual front and rear connection positions between the unit reception part and the unit connection part in order to adjust front and rear connection positions of the pedal attachment / detachment unit 100 for bicycle to the bicycle body 10 thereby adjusting tensile force of the chain.SELECTED DRAWING: Figure 12

Description

[Technical field]

[0001] The present invention relates to a bicycle pedal attachment / detachment unit and a bicycle equipped with the same. [Background technology]

[0002] Conventionally, bicycles for training with detachable pedal units have been developed and used. These have a structure in which the unit main body, including the chain wheel and pedal crank, can be attached and detached to the bicycle body with bolts or the like, and the pedal unit can be fixed and released with bolts and nuts.

[0003] With this configuration, when riding a bicycle for the first time, the user can remove the unit body and kick the ground with his / her feet to learn how to handle the bicycle and develop a sense of balance, and once he / she has gained some ability to ride, he / she can attach the unit body to the bicycle and practice pushing the pedals connected to the pedal cranks to move the bicycle forward. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2013-147199 A DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0005] However, with the above bicycles, it is difficult to adjust the slack in the chain after the pedal unit is connected to the bicycle body. In particular, with practice bicycles, which fall over frequently, the pedal unit hits the ground repeatedly, making the chain more likely to loosen than with normal bicycles.

[0006] The present invention has been made in consideration of the above problems, and aims to provide a training bicycle with a detachable pedal unit that allows chain slack to be adjusted in a simple manner. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention provides a bicycle pedal attachment / detachment unit for detachably connecting a pedal crank to a bicycle body, the unit comprising: a unit main body having a unit connection part for rotatably holding a pedal crank to which a chain wheel is attached and for connecting the pedal crank to the bicycle body; and a unit receiving part for connecting to the unit connection part which is fixedly installed on the bicycle body. The unit receiving part and the unit connection part have a locking mechanism for locking the unit to the bicycle body, and the locking mechanism is provided with a locking mechanism for locking the unit to the bicycle body. The configuration is equipped with a slide adjustment mechanism that changes and fixes the front and rear connection positions.

[0008] In addition, the slide adjustment mechanism comprises a unit receiving part having a receiving part side joining hole drilled therein, a unit connection part having a connection part side joining hole drilled therein, and a bolt that screws together the unit receiving part and the unit connection part via the receiving part side joining hole and the connection part side joining hole, and the receiving part side joining hole and the connection part side joining hole are drilled at corresponding positions to form a pair of connecting holes that are communicating holes, and the pair of communicating joining holes are screwed together by the bolt.

[0009] In addition, the pair of connecting holes are formed as long holes so that at least one of the receiving part side connecting hole or the connecting part side connecting hole can be adjusted to slide in the forward / backward direction, and the unit receiving part and the unit connecting part are screwed together with the bolts through the pair of connecting holes, making it possible to adjust the unit main body to slide forward / back along the long holes.

[0010] In addition, the slide adjustment mechanism is configured so that a screw-shaped adjustment part that abuts against the unit receiving part is freely screwed into the tip of the unit connection part so as to fine-tune the fore-and-aft position of the unit main body relative to the bicycle body by pressing a screw that rotates and moves.

[0011] The bicycle pedal attachment / detachment unit of claim 2 or 3, characterized in that the slide adjustment mechanism has a screw-shaped adjustment portion that abuts against the unit connection portion and is rotatably screwed into the tip of the unit receiving portion, so that the front-to-rear position of the unit body relative to the bicycle body can be fine-tuned by pressing a screw that rotates and moves. The slide adjustment mechanism is also configured to include a pair of connecting holes. The pair of joining holes are drilled so that the long holes forming the respective connection holes are parallel to each other, and the drilling positions of the pair of joining holes are displaced in the front-rear direction.

[0012] The slide adjustment mechanism comprises one of the pair of joining holes, one of which is a pair of shaft side joining holes consisting of circular holes, and the other of which is a pair of slide joining holes including a curved hole drilled in approximately a C-shape to surround the shaft side joining hole, and the unit receiving portion and the unit connection portion are screwed with bolts through the shaft side joining hole and the rotary slide joining hole, making the unit body slidable along the slide joining hole with the shaft joining hole as the axis.

[0013] In addition, the bicycle pedal attachment / detachment unit is configured such that one of the unit receiving portion and the unit connecting portion is made of a plate-like or box-like member, and the other is made of a clamping member that clamps the plate-like or box-like member. Furthermore, a bicycle according to the present invention is configured to include the bicycle pedal attachment / detachment unit described above. Effect of the Invention

[0014] The present invention has the configuration as described above in detail and thus has the following effects. 1. The bicycle pedal attachment / detachment unit allows the pedal crank to be detachably connected to the bicycle body. In addition, the bicycle pedal attachment / detachment unit is equipped with a slide adjustment mechanism, which allows fine adjustment of the installation position of the pedal attachment / detachment unit, allowing the bicycle chain to be kept at an appropriate tension and preventing the chain from falling off while riding the bicycle. 2. The slide adjustment mechanism is connected via connection holes drilled into the unit connection part and the unit receiving part, respectively, so that the pedal attachment / detachment unit can be securely fixed to the bicycle body while also being easily removed.

[0015] 3. Since at least one of the receiving side connection hole or the connection side joining hole is formed as a long hole, the unit body can be slid back and forth along the long hole, and the connection position can be adjusted by sliding it approximately horizontally. 4. A screw-shaped adjustment part that abuts against the unit receiving part is screwed into the tip of the unit connection part, making it possible to fine-tune the front-to-rear position of the unit body by pressing on the screw that rotates and moves it.

[0016] 5. A screw-shaped adjustment portion that abuts against the unit connection portion is screwed into the tip of the unit receiving portion, so that the front-to-rear position of the unit body can be fine-tuned by pressing the screw that rotates and moves it. 6. Since the slide adjustment mechanism has multiple pairs of connection holes, it is possible to stably and firmly fix the pedal attachment / detachment unit to the bicycle body.

[0017] 7. The long holes of the pair of connection holes that form each connection hole are drilled so as to be parallel to each other, and the drilling positions of the pair of joining holes are displaced in the fore-and-aft direction, making it possible to fix the pedal attachment / detachment unit to the bicycle body in a more stable state. 8. One of the pair of connecting holes is a circular hole, and the other is a curved hole drilled in a C-shape. This makes it possible to fine-tune the position of the unit body by sliding it so that it rotates around the circular hole as an axis.

[0018] 9. Since one of the unit receiving part and the unit connecting part is a plate-shaped member or a box-shaped member, and the other is a clamping member that clamps the plate-shaped member or the box-shaped member, it is possible to strengthen the bolt connection between the unit connecting part and the unit receiving part, enabling a stable connection of the pedal attachment / detachment unit. 10. The pedal attachment / detachment unit of the above structure can be adapted to bicycles of all sizes. BEST MODE FOR CARRYING OUT THEINVENTION

[0019] The bicycle pedal attachment / detachment unit according to the present invention will be described in detail below with reference to the embodiments shown in the drawings. Fig. 1 is a side view of a bicycle to which the bicycle pedal attachment / detachment unit according to the present invention is connected, and Fig. 2 is a perspective view of the unit body side of the bicycle pedal attachment / detachment unit. Fig. 3 is a side view of a bicycle pedal attachment / detachment unit in which the connection hole on the unit receiving part side is an elongated hole, and Fig. 4 is a side view of a bicycle pedal attachment / detachment unit in which the connection hole on the unit connecting part side is an elongated hole.

[0020] Fig. 5 is a side view of a bicycle pedal attachment / detachment unit in which the connection hole on the unit receiving part side is a rotation slide joining hole, and Fig. 6 is a side view of a bicycle pedal attachment / detachment unit in which the connection hole on the unit connecting part side is a rotation slide joining hole. Fig. 7 is a front view of a bicycle pedal attachment / detachment unit with the unit connecting part side as a clamping member before connection, and Fig. 8 is a front view of a bicycle pedal attachment / detachment unit with the unit connecting part side as a clamping member after connection. Fig. 9 is a front view of a bicycle pedal attachment / detachment unit with the unit receiving part side as a clamping member before connection, and Fig. 10 is a front view of a bicycle pedal attachment / detachment unit with the unit receiving part side as a clamping member after connection. Fig. 11 is a side view of a bicycle main body before adjustment by a screw-shaped adjustment part, and Fig. 12 is a side view of a bicycle main body after adjustment by a screw-shaped adjustment part.

[0021] As shown in Figs. 3 to 6, the bicycle pedal attachment / detachment unit 100 according to the present invention is composed of a unit body 110 having a unit connection part 120, and a unit receiving part 130. The unit body 10, which includes a pedal crank, is detachably connected to the unit receiving part 130, which is fixedly connected to the bicycle body 10, so that the unit connection part 120 of the unit body 10 is adjustable in position. It is a dull detachable unit.

[0022] As shown in Fig. 2, the unit body 110 is a member that rotatably holds the pedal crank 12 to which the chain wheel 11 is pivotally attached, and connects it to the bicycle body 10. As shown in Fig. 2, the unit body 110 is equipped with a unit connection part 120. The unit connection part 120 is a member that connects and fixes the unit body 110 to the bicycle body 10, and in this embodiment, it is configured to be connected to a unit receiving part 130 provided on the bicycle body 10, as will be described later.

[0023] In this embodiment, the unit connection part 120 is configured to be welded to the unit main body 110, but this is not limited to this and it may be configured to be attached by integral formation. Also, in this embodiment, the unit connection part 120 is made of the same iron as the bicycle main body 10 in order to maintain strength, but this is not limited to this and it is possible to use aluminum, chromoly, carbon, titanium, resin, or other materials that have sufficient strength, as appropriately selected, for weight reduction.

[0024] As shown in Figures 1 and 3, the bicycle main body 10 is equipped with a unit receiving part 130 in the center of the main body. The unit receiving part 130 is a member for connecting with the unit connection part 120, and in this embodiment, it is fixed and installed at the lower part of the frame of the bicycle main body 10 (for example, the part where the lower part of the down tube intersects with the seat tube, the seat tube, or the top tube). At this time, it is possible to fix and install it at any position on the frame of the bicycle main body 10, such as fixing it only to the top tube, or fixing it to two places, the seat tube and the top tube.

[0025] Since the unit receiving part 130 is a member on which the force of pedaling is concentrated when the user gets on the bicycle and pedals, it is desirable that the unit receiving part 130 is a sturdy member and is firmly connected to the bicycle body 10. In this embodiment, the unit receiving part 130 is made of the same iron as the bicycle body 10, but this is not limited to this, and it is possible to use aluminum, chromium, carbon, titanium, resin, or other materials that have sufficient strength by appropriately selecting them. Also, in this embodiment, the unit receiving part 130 is configured to be welded to the bicycle body 10, but this is not limited to this, and it may be configured to be formed integrally with the frame of the bicycle body 10.

[0026] 3 to 6, the unit receiving portion 130 and the unit connecting portion 120 are equipped with a slide adjustment mechanism S. The slide adjustment mechanism S is a member for adjusting the front and rear connection positions of the bicycle pedal attachment / detachment unit 100 relative to the bicycle main body 10, thereby adjusting the tension of the chain 14 that is installed between the chain wheel 11 of the unit main body 110 and the rear sprocket 13.

[0027] The slide adjustment mechanism S makes it possible to change, adjust, and fix the fore-and-aft connection positions of the unit receiving part 130 and the unit connecting part 120 when connecting the unit main body 110 to the bicycle main body 10, thereby making it easy to adjust the fore-and-aft position of the unit main body 110 relative to the bicycle main body 10.

[0028] Conventionally, the rear end of a bicycle is cut into a U-shape so that the rear wheel axle can move back and forth relative to the bicycle body, and the tension of the bicycle chain is adjusted by shifting the rear wheel axle, which is fixed to the rear end, back and forth. However, the structure for finely adjusting the rear wheel axle back and forth is complicated, and the task is not easy and requires a great deal of effort, which creates the problem that it is not easy to change the installation position of the axle relative to the bicycle body. With the slide adjustment mechanism S of the present invention, it is possible to move the rear wheel axle back and forth while keeping the axle fixed. As shown in Figs. 11 and 12, by simply sliding the unit body 110 of the vehicle pedal attachment / detachment unit 100, the tension of the bicycle chain 14 can be easily adjusted.

[0029] The structure of the slide adjustment mechanism S will be described in detail below. As shown in Fig. 3 or 4 and Fig. 7 to 10, the slide adjustment mechanism S is configured to fixedly connect the unit receiving part 130 and the unit connecting part 120, with a receiving part side joining hole 140a drilled in the unit receiving part 130 and a connecting part side joining hole 140b drilled in the unit connecting part 120. The unit receiving part 130 and the unit connecting part 120 are configured to overlap the receiving part side joining hole 140a and the connecting part side joining hole 140b, and are screwed together via a bolt 150.

[0030] The receiving part side connection hole 140a and the connection part side joining hole 140b are drilled at positions corresponding to each other in the unit receiving part 130 and the unit connecting part 120. As a result, when the unit connecting part 120 is attached to the unit receiving part 130, the receiving part side connection hole 140a and the connection part side joining hole 140b form a communicating hole to form a pair of connecting holes 140. The unit main body 110 is connected to the bicycle main body 10 by screwing and fixing this pair of communicating joining holes 140 with a bolt 150. In this embodiment, for example, the bolt 150 is screwed and fixed into each connecting hole having a screw groove formed therein, but as shown in Figs. 7 to 10, a nut 152 may be screwed and fixed onto the bolt 150.

[0031] Next, the structure of the slide adjustment of the slide adjustment mechanism S will be described. The pair of joint holes 140 is configured such that at least one of the receiving part side connection hole 140a or the connecting part side joint hole 140b is formed as an elongated hole so that it can be slidably adjusted in the front-rear direction. In this embodiment, as shown in FIG. 3 or FIG. 4, one of the receiving part side connection hole 140a or the connecting part side joint hole 140b is formed in a circular shape, and the other is formed in an elongated hole (elliptical shape) so that it can be slidably adjusted in the approximately horizontal direction, but this is not limited thereto, and the shape and position of each hole can be appropriately adjusted and installed so that it can be slidably adjusted.

[0032] The unit receiving portion 130 and the unit connecting portion 120 are screwed by the bolt 150 through the pair of joining holes 140 formed as described above. With the bolt 150 loosened, the unit body 110 is slid back and forth along the long hole, and the unit body 110 is fixed by tightening the bolt 150 at any position, allowing the slide adjustment by the slide adjustment mechanism S. In this embodiment, the unit body 110 is configured to be movable back and forth by the length of the long hole, but the distance of the back and forth movement and the range of movement differ depending on the shape of the long hole. Also, as described above, the unit receiving portion 130 and the unit connecting portion 120 may be fixed by screwing the nut 152 onto the bolt 150.

[0033] As shown in Figs. 3 and 4, the slide adjustment mechanism S has a structure in which a screw-shaped adjustment part 160 is rotatably screwed to the tip of the unit connection part 120. In this embodiment, the screw-shaped adjustment part 160 is composed of a screw 162 and a screw hole 164 into which the screw 162 is rotatably screwed, and the screw 162 is screwed into the screw hole 164 drilled in the tip of the unit connection part 120. When the screw 162 is rotated and advanced, the tip of the screw 162 abuts against and presses the unit receiving part 130. Alternatively, a screw hole (not shown) is drilled at the abutment point of the screw 162 of the unit receiving part 130, and the screw 162 is screwed into the screw hole and presses. This makes it possible to slide the unit main body 110, and the front-rear position of the unit main body 110 relative to the bicycle main body 10 can be finely adjusted by pressing the rotating and moving screw 162.

[0034] 8, the slide adjustment mechanism S may be configured such that a screw-shaped adjustment part 160 is rotatably screwed into the tip of the unit receiving part 130. In this embodiment, the screw-shaped adjustment part 160 is made up of a screw 162 and a screw hole 164 into which the screw 162 is rotatably screwed. When the screw 162 is screwed into a screw hole 164 drilled in the tip of the unit receiving part 130 and rotated to advance, the tip of the screw 162 comes into contact with and presses the unit connection part 120. This makes it possible to slide the unit main body 110, and similarly to the above, the fore-aft position of the unit main body 110 relative to the bicycle main body 10 can be fine-tuned by pressing the screw 162 which rotates and moves.

[0035] The slide adjustment mechanism S can be configured to have a pair of connection holes 140 consisting of a plurality of holes. That is, a plurality of reception side connection holes 140a or connection side connection holes 140b are drilled in the unit reception part 130 and the unit connection part 120, forming a corresponding pair of connection holes 140. In this embodiment, as shown in FIG. 3 or FIG. 4, two pairs of connection holes 140 are drilled, but this is not limited thereto, and three or more pairs of connection holes 140 may be formed, or only one pair of connection holes 140 may be formed. The number of pairs of connection holes 140 can be appropriately selected depending on the size of the unit main body 110, the strength to be secured, and the required strength of the connection.

[0036] As shown in Fig. 3 or 4, the pair of joining holes 140 are drilled so that the long holes forming the respective joining holes are parallel to each other, and further, it is possible to displace the drilling positions of the pair of joining holes 140 in the front-rear direction. In other words, the height at which the pair of joining holes 140 are drilled can be changed. With this configuration, it is possible to fix the pedal attachment / detachment unit to the bicycle body in a more stable state.

[0037] Another embodiment of the slide adjustment mechanism S will be described. As shown in Fig. 5 or 6, the slide adjustment mechanism S can be configured such that one of a pair of joining holes 140 made up of two is a pair of shaft side joining holes 142 made up of circular holes, and the other is a pair of slide joining holes 144 including curved holes drilled in a substantially C-shape so as to surround the shaft side joining holes 142.

[0038] In this embodiment, the unit receiving portion 130 and the unit connecting portion 120 are screwed in by the bolt 150 through the shaft side connecting hole 142 and the rotary slide connecting hole 144. Also, as described above, the unit receiving portion 130 and the unit connecting portion 120 may be fixed by screwing the nut 152 onto the bolt 150. With this configuration, it is possible to slide the unit body 110 along the slide connecting hole 144 with the shaft connecting hole 142 as an axis, and it is possible to finely adjust the front-rear position of the unit body 110 by sliding the unit body 110 so as to rotate with the circular hole as an axis.

[0039] In this embodiment, as shown in Figs. 7 to 10, the bicycle pedal attachment / detachment unit 100 can be configured such that one of the unit receiving part 130 and the unit connecting part 120 is made of a plate-like member, and the other is made of a clamping member that clamps the plate-like member. It is also possible to configure one of the unit receiving part 130 and the unit connecting part 120 as a hollow box-like member, and the other is made of a clamping member that clamps the box-like member. In this embodiment, the clamping member that clamps the plate-like or box-like member that forms either the unit receiving part 130 or the unit connecting part 120 can be a member with a U-shaped cross section, but this is not limited to this, and any shape that can be clamped can be appropriately selected and used. It is also possible to configure the member that forms either the unit receiving part 130 or the unit connecting part 120 not as a box-like or plate-like member, but as a solid rectangular block, for example.

[0040] Next, a method for attaching and detaching the bicycle pedal attachment / detachment unit 100 according to the present invention will be described. The unit body 110 shown in Fig. 2 is placed under the bicycle to which the unit body 110 shown in Fig. 1 is not connected, as shown in Figs. 3 to 6, 7 and 9. Although not shown here, the chain 14 is previously installed between the chain wheel 11 and the rear sprocket 13. put.

[0041] Next, as shown in Fig. 8 or 10, the unit connection part 120 is inserted into and connected to the unit receiving part 130 installed on the bicycle body 10. After that, as shown in Fig. 8 or 10, the bolt 150 is screwed into a pair of connection holes having threads. Alternatively, the bolt 150 and the nut 152 are screwed into the pair of connection holes. At this stage, it is desirable to lightly tighten the bolts to temporarily secure them.

[0042] Next, as shown in Figs. 2 to 6, the screw 162 of the screw-shaped adjustment part 160 is tightened to finely adjust the unit body 110. This allows the tension of the chain 14 to be adjusted. That is, the chain 14 that was loose as shown in Fig. 11 is set with sufficient tension as shown in Fig. 12. When the chain 14 is in a moderately tensioned state as shown in Fig. 12, the bolt 150 (or the bolt 150 and the nut 152) is tightly tightened. This results in a bicycle with the bicycle pedal attachment / detachment unit 100 attached and with the chain 14 in a moderately tensioned state. If the chain 14 becomes loose while the bicycle is in use, the bolt 150 (or the bolt 150 and the nut 152) is loosened again and the connection position of the unit body 110 is adjusted by the screw-shaped adjustment part 160, thereby allowing the chain 14 to be returned to a moderately tensioned state again.

[0043] The bicycle pedal attachment / detachment unit 100 can be mounted on, for example, a training bicycle. In particular, when children practice riding a bicycle, by practicing on a bicycle with the bicycle pedal attachment / detachment unit 100 removed, they can learn the sense of balance required to ride a bicycle by kicking the ground with their feet to move forward, and when they are able to do so, they can acquire the skill of moving and operating the bicycle by attaching the bicycle pedal attachment / detachment unit 100 and using the propulsive force of the pedals, making it easier for children to practice riding a bicycle with just one bicycle. Furthermore, when children practice riding a bicycle with pedals, it is possible to fine-tune the installation position of the pedal attachment / detachment unit attached to the bicycle, maintain the tension of the bicycle chain, and prevent the chain from falling off while riding the bicycle, thereby avoiding injury and providing a safe bicycle ride.

[0044] In particular, when practicing riding a bicycle, it is easy to fall over and the pedal unit hits the ground repeatedly. As a result, the chain is more likely to loosen and fall off than on a normal bicycle. In this regard, with the bicycle of the present invention, the tension of the bicycle chain can be maintained and the chain can be prevented from falling off while riding the bicycle by finely adjusting the installation position of the bicycle pedal attachment / detachment unit 100 in the front-rear direction, preventing injury to the rider and enabling safe bicycle riding. Furthermore, in the past, when the chain became loose, it was necessary to remove the rear wheel axle and re-tension the chain, which was time-consuming and required tools. In contrast, with the bicycle of the present invention, the tension of the chain can be adjusted by simply turning the screw (screw 162) with a simple tool such as a hexagonal wrench, so the chain can be adjusted in a simple manner and time is saved. [Brief description of the drawings]

[0045] [Figure 1] 1 is a side view of a bicycle to which the bicycle pedal attachment / detachment unit according to the present invention is connected; [Diagram 2] 1 is a perspective view of the bicycle pedal attachment / detachment unit from the unit body side; [Diagram 3] A side view of a bicycle pedal attachment / detachment unit in which the connection hole on the unit receiving part side is an elongated hole. [Figure 4] A side view of a bicycle pedal attachment / detachment unit in which the connection hole on the unit connection side is an elongated hole. [Diagram 5] A side view of a bicycle pedal attachment / detachment unit in which the connection hole on the unit receiving part side is a rotation slide connection hole. [Figure 6] A side view of a bicycle pedal attachment / detachment unit in which the connection hole on the unit connection side is a rotation slide connection hole. [Figure 7] A front view of the bicycle pedal attachment / detachment unit with the unit connection part as a clamping member before connection. [Figure 8] A front view of the bicycle pedal attachment / detachment unit after connection, in which the unit connection portion is used as a clamping member. [Figure 9]A front view of the bicycle pedal attachment / detachment unit with the unit receiving portion as a clamping member before connection. [Figure 10] FIG. 10 is a front view of the bicycle pedal attachment / detachment unit with the unit receiving portion as a clamping member after connection. [Figure 11] A side view of the bicycle body before adjustment using the screw-shaped adjustment part [Figure 12] A side view of the bicycle body after adjustment using the screw-shaped adjustment part [Explanation of symbols]

[0046] S Slide adjustment mechanism 10 Bicycle body 11 Chainwheel 12 Pedal Crank 13 Rear sprocket 14 Chain 100 Bicycle pedal attachment / detachment unit 110 Unit body 120 Unit connection part 130 Unit receiving part 140 Pair of connecting holes 140a Receiver side joining hole 140b Connection side joint hole 142 Shaft side joint hole 144 Slide joint hole 150 Volts 152 Nut 160 Screw-type adjustment part 162 Screw 164 Screw hole

Claims

1. a unit body that rotatably holds a pedal crank to which a chain wheel is connected and has a unit connection part; a unit receiving part that is fixed to the bicycle body and connected to the unit connecting part to hold the unit body, one of the unit connection portion and the unit receiving portion is made of a plate-like member or a box-like member, and the other is made of a clamping member that clamps the plate-like member or the box-like member from the left and right and guides it when it is inserted, The plate-like or box-like member and the clamping member have a connection portion side joining hole and a receiving portion side joining hole drilled at corresponding positions and into which a bolt is screwed in the left-right direction, and at least one of the connection portion side joining hole and the receiving portion side joining hole is a long hole in the front-rear direction, so that when the bolt is loosened, they can slide relative to each other in the front-rear direction and can be fixed by tightening the bolt, The clamping member has a hole at its front end for receiving a screw that abuts against or screws into the plate-like member or box-like member, and by rotating the screw, the unit body can be moved back and forth relative to the bicycle body, thereby adjusting the tension of the chain. Bicycle pedal attachment / detachment unit.

2. The connecting portion side joining hole and the receiving portion side joining hole are provided in a plurality of pairs.

2. The bicycle pedal attachment / detachment unit according to claim 1.

3. The plate-like member or box-like member and the clamping member have shaft-side joining holes which are circular holes corresponding to each other, and the long hole is a curved hole drilled in a substantially C-shape with the shaft-side joining hole as a center.

2. The bicycle pedal attachment / detachment unit according to claim 1.

4. 4. The bicycle pedal attachment / detachment unit according to claim 1, wherein the clamping member is integrally formed from a member having a U-shaped cross section including the front tip portion.

5. A bicycle comprising the bicycle pedal attachment / detachment unit according to any one of claims 1 to 4.

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