JPH1129082A - Bicycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of part items and assembly man-hours of a tire pump so as to reduce cost, and increase the delivery air quantity of the tire pump. SOLUTION: A seat post 18 of a saddle 17 is inserted in a seat tube of a frame, and the seat post 18 is removably fixed by a fastening means. The inside of the seat tube is closed with a bottom plate 28 and a cover plate 33 so as to form a cylinder 39, and a piston rod 34 with a piston 35 is built in the seat tube in the state of piercing the cover plate 33 to constitute a tire pump 27. The cover plate 33 is fixed using the fastening means 19 for fixing the seat post 18 of the saddle 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bicycle, and more particularly, to a bicycle having an inflator.

[0002]

2. Description of the Related Art As a known bicycle, there is a known bicycle having a frame pump so as to be detachable from a seat tube, a top tube or a down tube of a frame. When the bicycle is provided with a frame pump in this way, it can be used immediately when needed, which is very convenient. However, in a bicycle including a conventional frame pump, there is a problem that the frame pump is easily stolen or lost because anyone can easily remove the frame pump.

In order to cope with such a problem, the present applicant has previously filed a Japanese Patent Application No. 8-136790, and has proposed a bicycle that can prevent theft or loss of an inflator. An outline of this bicycle inflator will be described with reference to FIGS. 10 and 11. FIG. 10 is a cross-sectional view showing a stored state of the air tank, and FIG. 11 is a cross-sectional view showing a used state of the air box. In FIG. 10, a seat post 118 of a saddle 117 is inserted into a seat tube 105 of a bicycle pipe frame. A U-shaped fastener 119 is disposed above the seat tube 105. The fastening fitting 119 can be fastened by a fastening bolt 120. The fastening of the fastening fitting 119 reduces the diameter of the seat tube 105, thereby fixing the seat post 118. Further, by releasing the fastening of the fastening fitting 119 by the fastening bolt 120, the seat post 118 can be removed from the seat tube 105.

The seat tube 105 has an air pump 1
27 are incorporated. The air supply 127 includes a cylinder 139 formed by closing the inside of the seat tube 105 with a bottom plate 128 and a cover plate 133, and a piston rod 134 incorporated in the seat tube 105 so as to penetrate the cover plate 133. ing. The lid plate 133 and the bottom plate 128 are respectively fixed to the seat tube 105 by press-fitting fixing pins. The seat tube 105 has an air outlet 129 communicating with the bottom of the cylinder 139. In the air outlet 129,
A rubber hose 130 having a base connectable to a tire valve (not shown) is connected. A pump handle 137 is attached to the upper end of the piston rod 134. The pump handle 137 is housed in the seat post 118 of the saddle 117.

[0005] When using the air tank 127,
The seat post 118 of the saddle 117 is removed from the seat tube 105 of the frame by releasing the fastening of the fastening fitting 119 by the fastening bolt 120. This state is shown in FIG. Then, after connecting the base of the hose 130 to the valve of the tire, the pump handle 1
37 is reciprocated up and down to inflate the tire. After the air is supplied, the seat post 118 of the saddle 117 is placed in the seat tube 105 in the reverse order.
Is inserted, and the fastening fitting 119 is tightened by the fastening bolt 120.
And fix the seat post (see FIG. 10).

According to the bicycle described above, since the air tank 127 is incorporated into the seat tube 105 of the frame, it is difficult to remove the air tank 127 from the frame, so that theft or loss can be prevented.

[0007]

However, in the above-described air supply 127, the cover plate 133 of the cylinder 139 is fixed to the seat tube 105 by a fixing pin or the like. For this reason, there is a problem that the fixing structure of the cover plate 133 using the fixing pins becomes complicated, the number of parts and the number of assembling steps are increased, and the cost is increased. In addition, saddle 11
7, the seat post 118 is inserted into the seat tube 105 with the maximum insertion amount. Considering the maximum insertion amount of the seat post 118, the cover plate 13
Since the fixing position of No. 3 is determined, the cover plate 133 can be fixed only to a position near the center of the seat tube 105. For this reason, the capacity of the cylinder 139 is limited to a small amount, and there is also a problem that the amount of air sent out by one operation of the pump handle 137 (also referred to as the amount of air sent out of the air inlet 127) is small.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to reduce the number of parts and the number of assembling steps of an air supply to reduce the cost, and to provide an air supply. The object of the present invention is to provide a bicycle capable of increasing the amount of air to be sent out.

[0009]

According to a first aspect of the present invention, a seat post of a saddle is inserted into a seat tube of a frame, and the seat post is removably fixed by fastening means. A bicycle, comprising a cylinder formed by closing the inside of a tube with a bottom plate and a lid plate, and a piston rod having a piston in the seat tube, the piston rod being incorporated in a state penetrating the lid plate. A plate is provided so as to be fixable by the fastening means. According to the bicycle according to the first aspect, the fixing plate for fixing the seat post of the saddle is fixed by using the fastener, so that the exclusive fixing structure for the lid plate required conventionally can be eliminated. it can. Therefore, it is possible to reduce the number of components and the number of assembling steps of the air supply, thereby reducing costs. Also, by fixing the lid plate instead of the seat post,
The lid plate can be fixed at a high position without being affected by the maximum insertion amount of the seat post. Therefore, the cylinder capacity of the air supply can be increased, and the amount of air sent out of the air supply can be increased.

According to a second aspect of the invention, there is provided the bicycle according to the first aspect, wherein the cover plate is slidably provided in the seat tube. According to the bicycle according to the second aspect, the cover plate can be stored in the seat tube without being removed from the seat tube and the piston rod. For this reason, it is possible to set and store the cover plate more easily than when the cover plate is detached from the seat tube and the piston rod and stored in another place.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. First, an outline of a bicycle will be described with reference to a schematic side view of FIG. As is well known, the pipe frame 1 includes a head tube 2, a top tube 3, a down tube 4, a seat tube 5, a pair of left and right seat stays 6, and a chain stay 7.

A handle post 9 of a handle 8 and a front fork 10 are provided on the head tube 2 so as to be steerable. A front wheel 12 is rotatably supported by the front fork 10. Further, a rear wheel 13 is rotatably supported by a joint between the seat stay 6 and the chain stay 7. The front wheel 12 and the rear wheel 13
Is a rim 1 with spokes (not shown)
4 is equipped with a tire 15. Further, a tube (not shown) is built in the tire 15. A valve 16 of the tube is fixed to each rim 14.

The down tube 4 and the seat tube 5
A pedal 21 is rotatably supported at the joint between the and the chain stay 7. By rotating the pedal 21, the rear wheel 13 is driven and rotated via the chain transmission mechanism 22. A front wheel mudguard 23 is attached to the front fork 10, and the seat stay 6
Is fitted with a rear wheel mudguard 24. A basket 25 is attached to the handle post 9.

At the upper end opening of the seat tube 5,
The seat post 18 of the saddle 17 is inserted. The seat post 18 is fixed by fastening with a fastening bolt 20 of a U-shaped fastening member 19 provided at the upper end of the seat tube 5. The fastening bolt 20
The one with the operation lever 20a is employed.

A structure for fixing the seat post 18 of the saddle 17 with the fastener 19 will be described with reference to a plan sectional view of FIG. The fastening fitting 19 is attached to the seat tube 5. Insertion holes 19 provided at both ends of fastening fitting 19
a, and a fastening bolt 20 is inserted into an insertion hole 6 a provided at an end of the seat stay 6.
, A washer 192 is fitted to the tip of
1 is screwed. Further, a slit-shaped interruption groove 51 is formed at the upper end of the seat tube 5. Accordingly, by tightening the fastening fitting 19 by screwing the fastening bolt 20, the diameter of the upper end portion of the seat tube 5 is reduced, whereby the seat post 18 is fixed together with the left and right seat stays 6. In addition, tightening bolt 2
The seat post 18 can be pulled out of the seat tube 5 by releasing the fastening of the fastening member 19 by retreating the seat post 18. The fastening means referred to in the present invention is mainly composed of the fastening fitting 19 having the fastening bolt 20.

In the bicycle described above, the seat tube 5 of the frame 1 has an air tank 27 incorporated therein (see FIG. 1). Hereinafter, the air supply 27 will be described.
In FIG. 2 showing the vicinity of the air tank 27 in a sectional view, the air tank 27 includes a bottom plate 28 and a cover plate 33 which form a cylinder 39 by closing the seat tube 5, and a cover plate 33 inside the seat tube 5. And a rubber hose 30 connected to the cylinder 39 as main components. Hereinafter, for convenience of explanation, the bottom plate 28, the hose 30, the piston rod 34, and the cover plate 33 will be described in detail in this order.

The bottom plate 28 will be described with reference to FIGS. 4, (a) is a plan view, (b) is a front sectional view,
(C) shows a right side view. The bottom plate 28 is formed in a substantially disk shape. The bottom plate 28 is formed with an L-shaped air passage 40 having an opening that opens on the upper surface and the side surface. In the air passage 40, a female screw 41 is formed in an upper surface opening opening on the upper surface of the bottom plate 28, and a stepped hole having a larger diameter on the opening side is formed in a side opening opening on a side surface of the bottom plate 28. A female screw 42 is provided in the opening on the large diameter side.
Are formed. An appropriate number (two are shown) of pin holes 43 are formed on the outer peripheral surface of the bottom plate 28. In addition, the bottom plate 28 has a rubber sealing member 44 on its outer peripheral surface for keeping confidentiality with the sheet tube 5.

As shown in FIG. 5 which is a sectional view of a mounting portion of the bottom plate 28, a hose mounting hole 5a corresponding to the female screw 42 of the bottom plate 28 is formed in the seat tube 5 in advance at the mounting position of the bottom plate 28. A pin insertion hole 5b corresponding to the pin hole 43 is formed. The bottom plate 2
8 is used with a set rod 48 shown in a side view in FIG. At one end of the set rod 48, a male screw 48a that can be screwed with the female screw 41 of the bottom plate 28 is formed.

Next, a procedure for attaching the bottom plate 28 will be described. First, the external thread 48a of the set rod 48 is screwed to the internal thread 41 on the upper surface of the bottom plate 28 (see a two-dot chain line in FIG. 4B). In this state, the bottom plate 28 is inserted into the seat tube 5 of the saddle 17 at a predetermined position in the seat tube 5 where the seat post 18 is not inserted, using the set rod 48. Next, as shown in the sectional view of FIG.
The fixing pin 53 is inserted into the pin insertion hole 5b of the seat tube 5.
The fixing of the bottom plate 28 is completed. Thereafter, the set rod 48 is removed from the bottom plate 28.

Next, the hose 30 will be described. As shown in FIG. 1, the hose 30 is communicated with the cylinder 39 through the air passage 40 of the bottom plate 28, and has a base 31 that can be connected to the valve 16 of the tire 15 at the tip. At the connection end of the hose 30, as shown in FIG.
A metal hose joint 52 having a tubular screw shaft portion 52a is attached. Hose joint 52
Is screwed to the female screw 42 of the bottom plate 28 through the hose mounting hole 5a of the seat tube 5. When the hose joint 52 is connected, a rubber check valve 47 movable in the axial direction is incorporated in the female screw 42 of the bottom plate 28. The check valve 47 opens and closes the air passage 40 by using the stepped surface (reference numeral 40 a) of the air passage 40 of the bottom plate 28 as a seat surface, and sends out air from inside the cylinder 39 to the hose 30. This allows the air to flow back from the hose 30 into the cylinder 39.

The hose 30 is detachably held by a plurality of clamps 32 while extending along the down tube 4 as shown in FIG.
The clamp 32 is made of resin, a leaf spring, a wire spring, or the like.
Well-known things can be adopted.

Next, the piston rod 34 will be described. As shown in FIG. 2, the piston rod 34 has a piston 35 at its lower end and a pump handle 37 at its upper end. The piston rod 34 is provided in the seat tube 5 so as to be movable in the axial direction.
The pump handle 37 is attached to the piston rod 34 after fitting a lower spring 36, a cover plate 33 described later, and an upper spring 38 to the piston rod 34. The pump handle 37 is connected to the seat post 18 of the saddle 17.
It is formed in a substantially columnar shape with an outer diameter smaller than the inner diameter. Further, the lower spring 36 performs a buffering action by elastically contacting the piston 35 when the piston rod 34 moves upward. The upper spring 38 elastically abuts on the pump handle 37 when the piston rod 34 is moved down, thereby performing a buffering action. The piston 35 has
A well-known check valve mechanism that allows air to be sucked into the cylinder 39 from the upper end opening of the seat tube 5 when the piston rod 34 rises, and prevents backflow of air from inside the cylinder 39 when the piston rod 34 moves downward. (Not shown) is incorporated.

Next, the cover plate 33 will be described with reference to FIG. 7, (a) is a plan view, (b) is a front sectional view,
(C) shows a right side view. The cover plate 33 is formed in a substantially disk shape. A rod insertion hole 33 a is formed in the axial center of the cover plate 33. Note that the lid plate 33 has a rubber sealing material 49 on the outer peripheral surface thereof for keeping confidentiality with the sheet tube 5 (see a two-dot chain line in FIG. 7B). The cover plate 33 is formed to have an outer diameter slidable in the seat tube 5 and an outer diameter that can be fixed by reducing the diameter of the seat tube 5 by tightening the fastener 19. The rod insertion hole 33a of the cover plate 33 is slidably fitted to the piston rod 34 (see a two-dot chain line in FIG. 7B). The cover plate 33 is arranged between the lower spring 36 and the upper spring 38 as shown in FIG.

A lower spring 36 is attached to the piston rod 34.
The cover plate 33 and the upper spring 38 are fitted and the pump handle 3
After attaching 7, the piston rod 34 is fitted to the seat tube 5. Thereafter, the seat post 18 of the saddle 17 is inserted into the seat tube 5, and the fastening fitting 19
Are tightened with the tightening bolts 20 to complete the attachment of the saddle 17. As shown in FIG. 2, the pump handle 37 is housed in the seat post 18 of the saddle 17, and is located near the upper end of the seat tube 5 when descending.

The case where the air tank 27 is used in the above-described bicycle will be described. In the state shown in FIGS. 1 and 2, for example, when it is desired to inflate the tire 15 of the front wheel 12, the fastening fitting 1 with the fastening bolt 20 is used.
9 is released, and the seat post 18 of the saddle 17 is removed from the seat tube 5. Next, the pump handle 3
By pulling up the piston rod 34 together with 7, the lid plate 33 is pulled up by the piston 35 to a position where the cover plate 33 can be fastened by the fastening fitting 19. Subsequently, the cover plate 33 is fixed by fastening the fastening fitting 19 with the fastening bolt 20. The fixed state of the cover plate 33 is shown in a plan sectional view in FIG. 8, and the air supply 27 in the same state is shown in a sectional view in FIG.

At the same time, the clamp 32 of the hose 30
Is removed, and the base 31 is connected to the valve 16 of the tire 15. In this state, the pump handle 37 is reciprocated up and down (see the bold arrow in FIG. 3), so that air is introduced into the tube through the valve 16 of the tire 15. Similarly, when the base 31 is connected to the valve 16 of the tire 15 of the rear wheel 13 as described above, air is introduced into the tube of the tire 15.

When the inflation is completed, the base 31 is removed from the valve 16 of the tire 15 in the reverse order, and the hose 30 is held by the clamp 32 while extending along the down tube 4. After releasing the fastening of the fastening fitting 19 by the fastening bolt 20, the seat post 18 of the saddle 17 is inserted into the seat tube 5. Then, the cover plate 33 is pushed down by the seat post 18. Subsequently, the fastening fitting 19 is fastened with the fastening bolt 20.
By fastening the seat post 18, the seat post 18 is fixed.

According to the bicycle described above, the cover plate 33 is fixed by using the fastener 19 for fixing the seat post 18 of the saddle 17, so that a dedicated fixing structure for the cover plate 33 required conventionally is provided. Can be eliminated.
Therefore, the number of parts and the number of assembling steps of the air container 27 can be reduced, and the cost can be reduced. Further, by fixing the cover plate 33 instead of the seat post 18, the cover plate 33 can be fixed at a high position without being influenced by the maximum insertion amount of the seat post 18, unlike the related art. Therefore, the capacity of the cylinder 39 of the air supply 27 can be increased, and the amount of air sent out of the air supply 27 can be increased.

Further, since the cover plate 33 is slidably provided in the seat tube 5, the cover plate 33 can be stored in the seat tube 5 without being removed from the seat tube 5 and the piston rod 34. it can. For this reason, compared with the case where the cover plate 33 is detached from the seat tube 5 and the piston rod 34 and stored in another place,
Can be easily set and stored. Cover plate 3
3 may be detached from the seat tube 5 and the piston rod 34 and stored in another place.

The present invention is not limited to the above embodiment, but can be modified without departing from the scope of the present invention. For example, the use of a large-diameter tube material for the seat tube 5 is advantageous in increasing the amount of air sent out of the air container 27. In addition, if a puncture repair box containing a set of puncture repair tools such as insect rubber, repair rubber, rubber glue, tools, etc. is provided at an appropriate portion such as the handle post 9 or the frame 1, an emergency puncture can be achieved. It is convenient for repair. Further, the pump handle 37 can be detached from the piston rod 34 and stored in a puncture repair box. With such a detachable pump handle 37, large operability can be obtained regardless of the diameter of the seat post 18. The use of a good pump handle 37 is enabled. When the basket 25 is detachable and a bag such as a plastic bag that can be set in the basket 25 is carried in the puncture repair box or the like, the basket 25 is removed in an emergency, and the basket 2 is removed.
By setting the bag body in 5, it can be conveniently used as a substitute for a bucket. Also, the piston rod 3
In attaching the pump handle 37 to the pump 4, an appropriate fixing means such as a screw means or an adhesive means can be adopted.

[0031]

According to the present invention, it is possible to reduce the number of parts and the number of assembling steps of the air supply, thereby reducing costs.
In addition, it is possible to increase the amount of air sent out from the air tank.

[Brief description of the drawings]

FIG. 1 is a side view of a bicycle showing one embodiment.

FIG. 2 is a cross-sectional view showing a stored state of an air supply.

FIG. 3 is a cross-sectional view showing a use state of the air supply.

FIG. 4 is an explanatory diagram of a bottom plate.

FIG. 5 is a cross-sectional view showing an attached state of a bottom plate.

FIG. 6 is an explanatory view of a set rod for a bottom plate.

FIG. 7 is an explanatory diagram of a cover plate.

FIG. 8 is a plan sectional view showing a fixed state of the cover plate.

FIG. 9 is a plan sectional view showing a seat post fixing structure of the saddle.

FIG. 10 is a sectional view showing a storage state of a conventional air supply.

FIG. 11 is a cross-sectional view showing a use state of a conventional air supply.

[Explanation of symbols]

 1 Frame 5 Seat Tube 17 Saddle 18 Seat Post 19 Fastening Fitting (Tightening Means) 27 Air Fill 28 Bottom Plate 33 Cover Plate 34 Piston Rod 35 Piston 39 Cylinder

Claims (2)

[Claims] 1. A cylinder is formed by inserting a saddle seat post into a seat tube of a frame, removably fixing the seat post by fastening means, and closing the seat tube with a bottom plate and a cover plate. A bicycle having an air tank in which a piston rod having a piston in the seat tube penetrates the lid plate, wherein the lid plate is provided so as to be fixable by the fastening means. Bicycle to do. 2. The bicycle according to claim 1, wherein the cover plate is slidably provided in the seat tube.