WO2010131383A1

WO2010131383A1 - Automatic suction device

Info

Publication number: WO2010131383A1
Application number: PCT/JP2009/069834
Authority: WO
Inventors: 雄太郎当田
Original assignee: 株式会社ソキュアス
Priority date: 2009-05-11
Filing date: 2009-11-25
Publication date: 2010-11-18
Also published as: JPWO2010131383A1; JP5459725B2

Abstract

Disclosed is an automatic suction device that automatically supplies air to a tire. Specifically disclosed is an automatic suction device which comprises a shock absorbing body, an elastic body, a hollow piston shaft, a hollow cylinder, and a piston ring. When a tire is brought into contact with the ground, an upward force is generated and applied to the shock absorbing body that is in contact with the interior of a tire tube in the vicinity of the contact area. The upward force is transmitted through the elastic body, and moves the piston shaft and the piston ring upward. When the piston shaft and the piston ring move upward, air inside an air chamber taken from an air intake of the piston ring is sent to the interior of the piston shaft. With this, air is sent from the piston shaft to the interior of the tire tube.

Description

Automatic intake device

The present invention relates to an automatic air intake device for a tire that automatically replenishes air from a tire such as a bicycle, a wheelchair, or a motorcycle. More specifically, it can be easily installed on the tire inlet (air valve) of bicycles, wheelchairs, motorcycles, and other tires. The present invention relates to an automatic air intake device for a tire that can maintain an appropriate pressure inside the tire by inhaling the air, thereby enabling safe and comfortable driving.

Usually, tires for bicycles, wheelchairs, and motorcycles (hereinafter collectively referred to as “bicycles”. In addition to bicycles, etc., they may be used for automobiles, trucks, etc., and these are collectively referred to as “vehicles”). In the beginning, even in an appropriate atmospheric pressure state, the pressure is gradually reduced over time due to air leakage from the rubber tube surface. If the pressure is further reduced, the ground contact surface portion of the tire is greatly recessed due to the weight of the vehicle body and the contact surface area is increased, so that the frictional resistance between the tire and the ground surface increases.

As a result, not only does it cause bad friction such as severe friction on the tire surface and frequent occurrence of puncture accidents during driving, but it is necessary to compensate for the decrease in speed, and the leg power to step on the pedal also increases, so that fatigue of both legs becomes excessive. Numerous problems arise.

For this reason, it is necessary to check the tires before riding a bicycle, etc., and if the tires are depressurized, use an electric compressor or a manual air pump. It is necessary to return the tires to the normal normal pressure state by the air work.

Also, as shown in Non-Patent Document 1 below, a special air pump is attached to the center axle of the bicycle, and high-pressure air generated by the air pump when the bicycle is running automatically enters the tire from the intake port through the tube. Some are used to maintain normal pressure at all times.

Furthermore, devices as in Patent Document 1 and Patent Document 2 below are disclosed as devices for automatically supplying air to tires.

Japanese Utility Model Publication No. 58-23706 JP 2007-302118 A

For example, when using an electric compressor that generates extremely high-pressure air in the air supply work to the tire, the tire of a bicycle or the like is originally a narrow ring shape, so its air capacity is very large is not. Electric compressors are often filled with air almost instantaneously, which often results in excessive air supply. As a result, there is a problem that the whole is in an ultra-high pressure state, cannot withstand the impact received when traveling on uneven roads, and easily causes a tire rupture accident.

Further, even when a manual air pump is used, the normal value of the tire pressure of a bicycle or the like is about 4 atm, which is a relatively high pressure. Pump operation is extremely burdensome. In addition, as a result of the fact that the use of the manual air pump, which is often caused by the damage of the fingers due to the damage of the hand, is further reduced, the abnormal pressure of tires such as bicycles is not improved. For this reason, the tire continues to run with an abnormal normal pressure, which causes the above-described numerous adverse effects.

On the other hand, when using an automatic air supply pump of a system previously installed on the axle portion as disclosed in Non-Patent Document 1, when attaching this to a bicycle or the like, the wheel is once removed from the vehicle body, It is necessary to remove the spokes installed between the axle and the rim individually, attach the pump device to the spokes, and perform assembly work again. Therefore, it is not something that anyone can easily do, but it is necessary to request work from a bicycle dealer.

Also, in addition to the original pump function, a complicated structure having an excess air discharge function, etc., inevitably becomes expensive, and the willingness to purchase is cut, and its use is not yet widespread.

Furthermore, in the case of the device of Patent Document 1, since all the device mechanisms are provided in the tire, a dedicated tire must be used. Therefore, when some trouble occurs in the apparatus, it is necessary to replace the tire itself. In addition, when the device of Patent Document 1 is attached to a vehicle that can move at high speed, such as an automobile, a motorcycle, or a sports bicycle, the tire of the vehicle rotates at a high speed, so that the piston moves at a high speed, Insufficient air supply.

Also, in the case of the device of Patent Document 2, since the operating piston has a branched shape, it is difficult to manufacture. In addition, there is no material that the applicant knows that the branched working piston feeds compressed air while deforming. Therefore, it is difficult to manufacture a device having a structure as in Patent Document 2 in the first place. Even if the material is present, there is a problem that the rubber tube is damaged from the inside due to rigidity, and the rubber tube is deteriorated.

Therefore, as described above, the present inventors have invented an automatic air intake device for a tire that automatically performs an air supply operation to a tire instead of an artificial tire air supply operation that easily causes problems. In addition, the inventor has invented an automatic air intake device for a tire that is readily available to anyone, is economical, and is extremely easy to install on a vehicle body.

A first aspect of the present invention is an automatic air intake device that automatically supplies air to a tire tube as the tire rotates. The automatic air intake device is applied to a shock absorber that is in contact with an inner wall of the tire tube and the shock absorber. An elastic body that transmits force, a hollow piston shaft that moves up and down by the force applied to the elastic body, and feeds air into the tire tube, and is attached to the tire or the intake port of the tire and takes in air outside the tire In order to take in air from the vent hole drilled for the purpose, it is joined to the hollow cylinder forming the air chamber and the piston shaft, and moves up and down along the inner wall of the cylinder together with the piston shaft, A piston ring provided with an intake hole for sending air in the air chamber to the inside of the piston shaft when moving in the upward direction. The air device generates an upward force with respect to the shock absorber in contact with the tire tube in the vicinity of the ground surface when the tire is grounded, and the upward force causes the elastic member to pass through the elastic body. The piston shaft and the piston ring move upward, and when moving in the upward direction, air in the air chamber taken in from the intake hole of the piston ring is sent into the piston shaft so that the piston shaft and the piston ring move from the piston shaft. It is an automatic air intake device in which air is fed into the tire tube.

By configuring as in the present invention, it is possible to configure an automatic air intake device to the tire that is attached to the tire or the tire tube outside the tire. As a result, the user can automatically perform an air supply operation to the tire simply by traveling on a bicycle or the like. Moreover, since the attachment to a tire or a tire tube is extremely easy, the user can also perform this work. In addition, since it is attached to the outside of the tire, even if the automatic intake device fails for some reason, it is only necessary to replace the automatic intake device, and the replacement work can be performed very easily.

In the above-described invention, the automatic intake device further moves the piston shaft and the piston ring downward by the urging of the elastic body when the ground contact of the tire near the tire tube with which the shock absorber contacts is eliminated. And it can also be comprised like the automatic air intake device which fills the air of the said air chamber by taking in external air from the said vent hole into the said air chamber by the downward movement of the said piston ring.

This makes it possible to replenish and fill the air chamber in the piston cylinder with the air supplied into the tire.

In the above-described invention, the automatic intake device further includes a first check valve that prevents backflow of air from the air chamber to the vent, and the intake hole from the inside of the piston shaft. It can also be configured as an automatic intake device that includes a second check valve that prevents backflow of air into the air chamber.

By providing two check valves as in the present invention, it is possible to prevent the backflow of air and to construct an efficient intake device.

In the above-described invention, when the automatic intake device is attached to the intake port of a tire, a screw portion for screwing with the intake port is threaded on the inner wall side surface of the lower portion of the cylinder. By adjusting the screwed state between the part and the intake port, it is possible to configure an automatic intake device in which the length of the piston shaft can be adjusted.

Bicycles, wheelchairs and motorcycles have different tire sizes. In addition, tire sizes are different in each category such as bicycles, wheelchairs, and motorcycles. When the tire size is different, the length from the tire inlet to the inner wall of the tire tube is different. That is, even in the automatic intake device, the length of the piston shaft needs to be adjusted. If this happens, an automatic air intake device that matches the size of each tire must be manufactured, which is not efficient. Therefore, as in the present invention, by providing a threaded portion on the lower inner wall of the cylinder of the automatic air intake device, the length of the piston shaft can be adjusted by adjusting the manner of screwing when attaching to the intake port. Is possible. As a result, even if the tire size is different, it is possible to cope with it.

According to a second aspect of the present invention, there is provided an automatic air intake device that automatically supplies air to a tire tube as the tire rotates. The automatic air intake device is applied to a shock absorber in contact with an inner wall of the tire tube and the shock absorber. An elastic body for transmitting force, a hollow piston shaft that moves up and down by the force applied to the elastic body, and feeds air taken in from the first intake hole formed in the upper portion into the tire tube, and a tire A hollow first cylinder that forms a first air chamber that takes in air from a vent hole that is formed to take in air outside the vehicle, and the first cylinder that is attached to a tire or a tire inlet To form a space between the first cylinder as a second air chamber, and from the second intake hole formed in the upper part of the first cylinder, Sky A hollow second cylinder that takes in the air in the chamber into the second air chamber, and a piston ring that is joined to the piston shaft and moves up and down along the inner wall of the first cylinder together with the piston shaft The automatic air intake device generates an upward force on the shock absorber inscribed in the tire tube near the ground surface when the tire contacts the ground, and the upward force Thus, the piston shaft and the piston ring move up the first cylinder through the elastic body, and the air in the first air chamber is moved to the second in the upward movement. The first air chamber is fed into the second air chamber, and the air in the second air chamber is supplied to the first cylinder from a third air intake hole formed below the piston ring in the first cylinder. Cylinder The air is sent into the space below the piston ring, and the air sent into the space is taken into the piston shaft by the piston shaft from the first intake hole. It is an automatic air intake device in which air is fed into the tire tube.

When carrying out high-speed driving with a bicycle or the like capable of high-speed driving, the tires naturally rotate at high speed. In that case, the contact time of the tire in the vicinity of the tire tube with which the shock absorber is in contact also becomes short, and as a result, the vertical movement of the piston shaft becomes extremely fast. For this reason, the air compression operation in the cylinder by the piston ring cannot be performed sufficiently, and air may not be fed into the tire tube.

Therefore, as in the present invention, the air chamber is divided into two, and the air chamber for performing the compression work is made smaller than before. As a result, the air compression operation in the cylinder by the piston ring can be performed efficiently, so that it is possible to cope with high-speed traveling.

In the above-described invention, the automatic intake device further moves the piston shaft and the piston ring downward by the urging of the elastic body when the ground contact of the tire near the tire tube with which the shock absorber contacts is eliminated. Then, by downward movement of the piston ring, outside air is taken into the first air chamber from the vent hole, and the taken-in air is transferred from the second intake hole to the second air chamber. The air in the second air chamber is fed into a space below the piston ring of the first cylinder from a third intake hole drilled below the piston ring in the first cylinder. It can also be configured as an automatic air intake device that fills the air in the first air chamber, the second air chamber, and the space by feeding.

This makes it possible to replenish and fill each air chamber or space in the piston cylinder with the air supplied into the tire.

In the above-described invention, the automatic intake device further includes a first check valve that prevents backflow of air from the first air chamber to the vent, and a second intake hole at the vent. A second check valve that prevents backflow of air from the second air chamber to the first air chamber may be configured as an automatic intake device.

In the above-described invention, when the automatic intake device is attached to the intake port of a tire, a screw portion for screwing with the intake port is threaded on the inner wall side surface of the lower portion of the second cylinder. Further, by adjusting the screwed state between the screw portion and the intake port, the length of the piston shaft can be adjusted so that the automatic intake device can be configured.

By configuring as in the present invention, even when the tire size is different as described above, a screw portion is provided on the lower inner wall of the cylinder of the automatic intake device, so that it can be attached to the intake port. The length of the piston shaft can be adjusted by adjusting the screwing method. As a result, even if the tire size is different, it is possible to cope with it.

In the above-described invention, the shock absorber can be configured as an automatic air intake device in which a surface in contact with the tire tube has a hollow shape.

In this way, by forming the bottom surface of the buffer body (the surface in contact with the inner wall of the tire tube) into a hollow shape, the bottom surface of the buffer body is flattened and contacts the inner wall of the tire tube when the tire contacts the ground. As a result, the contact surface between the shock absorber and the tire tube is increased, so that the pressure is dispersed and damage to the tire tube is prevented.

In the above-described invention, the automatic intake device further includes a shaft tube that covers a part or all of the outer periphery of the piston shaft, and a seal tube that covers a part or all of the outer periphery of the shaft tube. And, when the automatic intake device is attached to the intake port of the tire, it is configured as an automatic intake device that prevents leakage of air from the tire by crimping the seal pipe and the intake port. You can also.

When adjusting the length of the piston shaft by screwing the lower inner wall of the piston cylinder, it is easy to create a gap between the tire inlet and the automatic intake device. There is a possibility that air leaks from this gap. Thus, as in the present invention, the periphery of the shaft tube is covered with a seal tube, and the seal tube and the tire inlet are pressure-bonded to prevent air leakage.

In the above-described invention, the buffer body can be configured as an automatic intake device attached to the elastic body or the piston shaft.

It may be attached to any of the shock absorber, elastic body, and piston shaft.

In the above-described invention, a tire including the automatic air intake device according to any one of claims 1 to 11 can be configured.

Furthermore, in the above-described invention, a vehicle including the tire according to claim 12 can be configured.

As described above, according to the automatic air intake device for a tire of the present invention, it is possible to be in any situation as long as the device is mounted with a very simple operation by simply installing the device at the intake port of the tire. However, the tire can always maintain a normal pressure state by an accurate automatic air intake operation into the tire.

Therefore, the troublesome tire air supply work as in the prior art is omitted, and there are no adverse effects such as puncture accidents and fatigue of both legs induced when running with a decompression tire. Therefore, it is extremely safe and convenient, and if the pressure inside the tire that automatically inhales is set to a value (length) that provides a comfortable driving feeling by adjusting the length of the rocking rod beforehand, The size is outstanding and the whole is made compact, so it can be provided at a relatively low cost.

Therefore, it is easy for anyone to obtain and is extremely economical. Furthermore, as with the conventional intake port (air valve), not only can a manual intake pump be used to supply air, but the object of use can be, for example, a motorcycle, It is an excellent invention with extremely high public interest that can be applied to wheelchairs, ordinary cars, and the like.

It is a figure which shows the usage type of the automatic air intake device to the tire of this invention. It is sectional drawing which shows typically the structure of the automatic air intake device in Example 1. FIG. It is a figure which shows typically the case where the automatic air intake apparatus of this invention is installed in the tire of a normal pressure state. FIG. 2 is a diagram schematically showing the function of the automatic intake device of the present invention installed in a tire in an abnormally decompressed state. It is a figure which shows typically the automatic intake device in Example 2. FIG. It is a figure which shows typically the components expanded view of the automatic intake device in Example 2. FIG. It is sectional drawing which shows typically the structure of the automatic intake device in Example 2. FIG. It is a figure which shows typically the other structure of the non-return valve in Example 3. FIG. It is a figure which shows typically the other structure of the non-return valve in Example 4. FIG. It is sectional drawing which shows typically the structure of the automatic intake device in Example 5. FIG. It is a figure which shows typically the other structure of a buffer. It is a figure which shows typically the other structure of a rocking rod.

Hereinafter, an automatic air intake device for the tire 6 such as a bicycle of the present invention will be described. FIG. 1 is a diagram showing a usage pattern of an automatic air intake device (hereinafter simply referred to as “automatic air intake device”; hereinafter the same) to the tire 6 in the first embodiment. As shown in FIG. 1, the automatic air intake apparatus of the present invention can be directly attached to an air inlet 7 (air valve) provided in a tire 6 such as a bicycle.

Hereinafter, each embodiment of the automatic intake device of the present invention will be described.

FIG. 2 is a cross-sectional view schematically showing the structure of the automatic intake device in the first embodiment.

The fitting part 10 provided in the upper wall 11 of the cylinder 1 formed into a cylindrical shape having an appropriate length and diameter of metal material is screwed to the exhaust port of the air pump around the metal, or a cap The lower end portion of the intake pipe 9 provided with a screw portion 29 for screwing is inserted and installed, and the lower end portion of the vent hole 12 provided in a through state in the intake pipe 9 is closed, As shown in FIG. 2, a groove portion 13 is provided, and a rubber tube 16 having an appropriate thickness and diameter is fitted on the intake hole 15 provided in the lower end wall 14 of the vent hole 12 adjacent to the groove portion 13. A check valve 17 is formed.

The cylinder 1 is provided on the inner wall of the lower end portion of the cylinder 1 with a screw portion 18 for screwing the bicycle tire 6 at the intake port 7, and the inner wall just above the screw portion 18 is suitable for the shaft hole 19 located in the center. A bottom wall portion 21 in which the upper end of a metallic shaft tube 20 having a long length and a diameter is provided, and a rubber that can move up and down in an airtight manner along the inner wall of the cylinder 1. Or a metal having a diameter slightly larger than the maximum diameter of the intake hole 22 in the inside of the intake hole 22 having the shape shown in FIG. A check valve 25 is formed in which a spherical body 23 made of rubber or hard plastic is pressed against the intake hole 22 by the elasticity of the push spring 24, and a metal is formed in the central shaft hole 30 below the piston ring 2. A metal base 26 having the upper end of the tubular piston shaft 3 penetratingly installed is firmly attached, and the lower end portion of the piston shaft 3 penetrates the shaft tube 20 located at the center of the bottom wall portion 21 to form the cylinder 1. Appropriate length, with a projecting state underneath, and a flexible and durable material cushioning body 5 such as synthetic rubber to suppress the impact when pressed by the tire to the extreme. The lower end of the piston shaft 3 protruding below the cylinder 1 is inserted into and connected to the upper end of a swinging rod made of a tightly wound spring having a diameter and rich in elastic restoring force. The push-up action generated by the dent 8 on the ground surface is transmitted to the piston ring 2 via the piston shaft 3 so that the piston ring can compress the air in the cylinder 1.

In addition, when the cylinder 1 is installed in the intake port 7 of the tire 6, an airtight rubber having an outer shape slightly larger than the diameter of the intake port 7 in advance or a synthetic rubber is used to prevent leakage of high-pressure air from the installation location. A piston seal ring 27 is attached to the shaft pipe 20 penetrating into the intake port 7 and the seal tube 27 is pressure-bonded to the intake port 7 to prevent air leakage, and the piston ring which has finished raising the cylinder. In order to lower 2, a winding spring 28 is mounted between the swing rod 4 and the shaft tube 20, and the piston shaft 3 can be pushed down together with the piston ring 2 by the elastic restoring force of the winding spring. In the present specification, the case where the winding spring 28 and the swing rod 4 are springs will be described, but other elastic bodies such as rubber may be used.

Hereinafter, the structure of the automatic intake device in the first embodiment will be described in more detail.

Since the automatic intake device of the present invention is screwed into an intake port 7 (air valve) provided in a tire 6 of a bicycle such as a bicycle, a wheelchair, or a motorcycle, the cylinder has a size that can be screwed into the intake port 7. 1 is provided. On the lower inner wall of the cylinder 1, a screw portion 18 for screwing to the air inlet 7 is provided.

Also, a bottom wall portion 21 is provided in the cylinder 1 above the screw portion 18 so as to form an air chamber for filling the air in the cylinder 1. Thus, an air chamber is formed by the bottom wall portion 21, the upper wall 11 of the cylinder 1, and the inner wall on the side surface of the cylinder 1. The air chamber is provided with a piston ring 2 that can move up and down in the air chamber along the inner wall side surface of the cylinder 1.

The upper wall 11 of the cylinder 1 is provided with a fitting portion 10 having a predetermined size, and an intake pipe 9 is joined to the fitting portion 10. The outer surface of the intake pipe 9 is preferably provided with a screw portion 29 for screwing the cap, but the screw portion 29 may not be provided when the cap is not used. Moreover, it is not necessary to attach the cap by screwing. In that case, it is only necessary that the cap can be appropriately attached. Further, a hole for allowing air to pass therethrough is provided in the vicinity of the cap, preferably the center thereof.

An air inlet 12 of an appropriate size for air to pass through is preferably formed in the vicinity of the center of the intake pipe 9 from the upper side to the lower side. This vent hole 12 may penetrate or the lower end may be closed. A groove 13 is provided in the vicinity of the lower end of the vent 12, and at least one intake hole 15 is provided at a predetermined position of the lower end wall 14 so that air flows between the groove 13 and the vent 12. .

Also, a rubber tube 16 is attached (covered) along the groove 13 so as to close the lower end of the vent 12 and the intake hole 15. As a result, a check valve 17 is formed in which air flowing in from the upper part of the vent 12 passes through the vent 12 and the intake hole 15 and does not flow back into the air chamber. The air flowing in from the upper part of the vent hole 12 passes through the intake hole 15. At this time, the rubber tube 16 expands due to the elastic action of the rubber tube 16, so that the air passing through the intake hole 15 flows into the cylinder 1. It flows into the air chamber. After the inflow, the intake hole 15 is closed by the elastic action of the rubber tube 16, so that the air in the air chamber of the cylinder-1 does not flow backward.

In the above description, the intake pipe 9 is joined to the upper wall of the cylinder 1, but the intake pipe 9 can be integrally formed with the cylinder 1.

Also, the piston ring 2 provided in the air chamber of the cylinder 1 has an intake hole 22 penetrating in the vicinity of the center thereof, and a check valve 25 is incorporated. The check valve 25 includes a sphere 23 having a size (diameter slightly larger than the diameter of the intake hole 22) that closes the intake hole 22 in the recess inside the piston ring 2, and the sphere 23 is the lower end of the piston ring 2. Is attached to an upper portion of a pressing spring 24 provided in the vicinity of the center of the support 26 for supporting the.

Further, a hollow piston shaft 3 is provided near the center of the support 26. Thus, when the piston ring 2 moves upward, the sphere 23 is pushed downward by the air pressure of the air flowing in from the intake hole 22, and the air in the air chamber flows into the piston shaft 3 from the intake hole 22. Will be. Further, when the piston shaft 3 moves downward, the spherical body 23 closes the intake hole 22 due to the elastic action of the push spring 24, so that the air in the piston shaft 3 may flow backward into the air chamber. Absent.

The piston shaft 3 passes through a shaft hole 19 provided in the vicinity of the center of the bottom wall portion 21 and protrudes outside the cylinder 1. A hollow shaft tube 20 is provided along the inner wall surface of the shaft hole 19 so that the piston shaft 3 can move up and down. The shaft tube 20 is provided below the shaft hole 19 in the bottom wall portion 21, and the periphery thereof is covered with a seal tube 27. The seal tube 27 prevents high-pressure air from leaking when the automatic intake device of the present invention is installed in the intake port 7, that is, when the screw portion 18 of the cylinder 1 is screwed into the intake port 7 of the tire. In order to prevent this, a gap is not formed between the air inlet 7 and the shaft tube 20. The seal tube 27 is preferably made of airtight rubber or synthetic rubber.

As described above, since the seal tube 27 is attached to the shaft tube 20, the seal tube 27 and the air inlet 7 are pressure-bonded, and air leakage in the tire is eliminated. Therefore, it is preferable that the diameter (outer diameter) of the seal tube 27 is the same as or slightly larger than the diameter (inner diameter) of the intake port 7. As a result, the seal tube 27 and the air inlet 7 are pressure-bonded. The diameter (outer diameter) of the shaft tube 20 is preferably the same as or smaller than the inner diameter of the seal tube 27, and the diameter (outer diameter) of the piston shaft 3 is preferably smaller than the inner diameter of the shaft tube 20. .

A winding spring 28 is provided on the outer periphery of the piston shaft 3 below the position where the shaft tube 20 and the seal tube 27 cover the piston shaft 3. That is, the piston shaft 3 is inserted inside the winding spring 28.

The upper end of the winding spring 28 is located at the lower end of the shaft tube 20 and the seal tube 27. The winding spring 28 is provided with a slight gap in the vertical direction in order to have elasticity, and is a tightly wound spring that is in close contact with the vertical direction below the lower end of the piston shaft 3. A ridge 4 is formed. In addition, a buffer body 5 made of a material such as synthetic rubber is attached to the lower end portion of the swing rod 4 (that is, the lower end portion of the winding spring 28) in order to reduce the impact when pressed against the inner wall of the tire tube. Yes.

The automatic intake device configured as described above is attached to the intake port 7 of a tire such as a bicycle. As described above, this attachment is performed by inserting protruding portions such as the swing rod 4 and the piston shaft 3 into the intake port 7 of the tire and screwing the screw portion 18 of the cylinder 1 and the intake port 7 together. Do.

When the automatic intake device is attached for the first time, the buffer body 5 is not in contact with the inner wall of the tire tube, that is, a gap between the tire tube inner wall and the buffer body 5 (the distance of this gap is α). However, it may be in contact (FIG. 3 shows the state of contact). However, this gap is preferably shorter than the height of the cylinder 1 in the air chamber (the interval between the top wall 11 and the bottom wall portion 12).

If the air pressure in the tire is normal, the automatic air intake device will not function, and the tire will continue to rotate and run.

However, when the tire air is reduced and the pressure is reduced, the tire is recessed, so that the shock absorber 5 comes into contact with the inner wall of the tire tube as shown in FIG. Then, an upward pressure is generated from the buffer body 5, whereby the piston shaft 3 moves upward in the air chamber of the cylinder 1. As a result, the piston ring 2 moves upward along the inner wall side surface of the air chamber (the difference between α in FIG. 3 and α0 in FIG. 4 is the moving distance of the piston ring).

At this time, since the air chamber is already filled with air, a downward air pressure is generated with respect to the intake hole 22 and the sphere 23 is pushed downward. As a result, air in the air chamber flows into the piston shaft 3, and air is sent from the inside of the piston shaft 3 into the tire tube.

Also, when the tire rotates, the tire near the tube in contact with the shock absorber 5 does not come into contact with the ground. Then, the piston ring 2 is pushed downward by the elastic action of the winding spring 28 and the swinging rod 4. On the other hand, the spherical body 23 is pushed upward by the elastic action of the push spring 24, and therefore closes the intake hole 22 of the piston ring 2. Thereby, the backflow of the air from the piston shaft 3 to the air chamber is prevented, and the check valve 25 functions.

In addition, when the piston ring 2 moves downward in the air chamber of the cylinder 1, the air pressure in the air chamber decreases. Therefore, external air flows from the air vent 12 of the intake pipe 9, passes through the intake hole 15, and flows into the air chamber. As a result, the air chamber is filled with air.

Further, when the air chamber is filled with air, the atmospheric pressure returns to the original state, so that the check valve 17 by the rubber tube 16 functions, and the air in the air chamber flows from the air chamber to the intake hole 15 and the vent 12. Will not flow backwards.

By repeating the above action, the tire tube is always automatically refilled with air. In addition, once the buffer body 5 contacts the inner wall of the tire tube, it then contacts the inner wall (the state shown in FIG. 3). However, depending on the length of the protruding portion such as the swing rod 4, the tire tube There may be a gap between the inner wall and the buffer 5. In this case, this gap is a condition for allowing the automatic intake device to function.

In addition, if the shock absorber 5 is always in contact with the inner wall of the tire tube and the tire pressure is normal, the air pressure is kept normal even if the tire in contact with the shock absorber 5 is grounded. Therefore, the piston ring 2 does not act. This prevents overfilling.

Next, a different embodiment of the automatic intake device of the present invention is schematically shown in FIG. FIG. 5 is an external view of the automatic intake device of the present embodiment, and FIG. 6 is a schematic exploded view of components of the automatic intake device. In the automatic intake device in the second embodiment shown in FIG. 7, the structure of the piston ring 2 and the like is the same, but the structure of the check valve 17 above the cylinder 1 is different from that in the first embodiment.

In the first embodiment, a groove 13 is provided at the lower end of the vent 12 of the intake pipe 9, the intake hole 15 is passed through a predetermined position of the lower end wall 14, and a rubber pipe 16 is attached to the groove 13 so that the check valve 17 is provided. Was forming.

However, in the second embodiment, a vent 12 is provided near the center of the intake pipe 9 and a tension spring 31 is attached to a predetermined portion of the vent 12. In addition, a recess 32 communicating with the vent 12 is provided at the lower end of the intake pipe 9, and a rubber seal 33 joined to the tension spring 31 is provided there. The maximum diameter of the recess 32 is larger than the diameter of the rubber seal 33, and the minimum diameter of the vent 12 is smaller than the diameter of the rubber seal 33. As shown in FIG. 7, the size (diameter) of the vent 12 may be changed from a predetermined position (for example, the attachment position of the tension spring 31). In this case, the diameter of the rubber seal 33 is the vent. What is necessary is just to be larger than the lower end of 12. If comprised as mentioned above, the non-return valve 17 'will be comprised.

The operation when the automatic intake device that constitutes the check valve 17 'as described above is attached to the tire inlet 7 will be described below. As in the first embodiment, when the automatic intake device is attached to the intake port 7 for the first time, it is preferable that the shock absorber 5 is not in contact with the inner wall of the tire tube (the distance is α). You may touch.

When the tire air is reduced and the pressure is reduced, the tire is recessed, and the shock absorber 5 comes into contact with the inner wall of the tire tube. Then, an upward pressure is generated from the buffer body 5, whereby the piston shaft 3 moves upward in the air chamber of the cylinder 1. As a result, the piston ring 2 moves upward along the side surface of the inner wall of the air chamber by a distance corresponding to the difference between α in FIG. 3 and α0 in FIG.

In addition, when the piston ring 2 moves downward in the air chamber of the cylinder 1, the air pressure in the air chamber decreases. Therefore, when the external air flows from the vent 12 of the intake pipe 9, the rubber seal 33 is pushed downward, and the vent 12 and the rubber seal 33 are formed at the lower end (air chamber side) of the recess 32 communicating with the vent 12. A gap is formed between the air chamber 1 and the air flow into the air chamber of the cylinder 1. As a result, the air chamber is filled with air.

Further, when the air chamber is filled with air, the atmospheric pressure returns to the original state, so that the rubber seal 33 is pulled upward by the elastic action of the pull spring 31 and the vent 12 is closed. As a result, the check valve 17 'functions and air in the air chamber of the cylinder 1 does not flow backward from the air chamber through the vent hole 12.

By repeating the above action, the tire tube is always automatically refilled with air. Similarly to the first embodiment, once the shock absorber 5 comes into contact with the inner wall of the tire tube, it then comes into contact with the inner wall (the state shown in FIG. 3). Depending on the length, there may be a gap (the distance of this gap is α) between the inner wall of the tire tube and the buffer body 5. In this case, this gap is a condition for allowing the automatic intake device to function.

In the check valve 17 ′ of Example 2, the check spring 17 ′ was configured by attaching the tension spring 31 to a predetermined portion of the vent 12 and attaching the other end of the tension spring 31 to the rubber seal 33.

The check valve 17 ′ can be configured as the check valve 17 ″ as follows by using the rubber piece 34 without using the tension spring 31. The configuration of the check valve 17 '' in this case is schematically shown in FIG.

That is, instead of the tension spring 31, a rubber piece 34 is attached to the air chamber side surface (inner surface) of the upper wall 11, and this rubber piece 34 is attached so as to press the rubber seal 33 upward. With the above configuration, the check valve 17 ″ is configured. FIG. 8A shows an enlarged view of the check valve 17 ″, and FIG. 8B shows a cross-sectional view of the check valve 17 ″ from below.

In order to allow the air from the vent 12 to flow in, the rubber piece 34 is configured so that there is a gap without blocking all of the diameter portion of the recess 32 (the diameter portion facing the air chamber). good.

The check valve 17 '' allows the rubber seal 33 to move up and down by the elastic action of the rubber piece 34 without using the tension spring 31, so that air can flow in from the vent 12. Backflow of air from the air chamber to the vent 12 can be prevented.

Note that the check valve 17 ″ of the third embodiment can be used in each embodiment of the present specification.

In the first to third embodiments, the check valve 25 provided on the piston ring 2 is formed by the sphere 23 and the pressing spring 24. However, in the fourth embodiment, as shown in FIG. A case where the check valve 25 ′ is formed by the piece 35 will be described. Note that the check valve 25 ′ of the fourth embodiment can be used in place of the check valve 25 of each embodiment of the present specification.

In the check valve 25, the vertical movement of the sphere 23 is controlled by the push spring 24, but in the check valve 25 'of this embodiment, the vertical movement of the sphere 23 is controlled by the rubber piece 35.

That is, in the check valve 25 ′ in the fourth embodiment, the rubber piece 35 is pressed upward from below the sphere 23 so as to press the sphere 23 into the intake hole 22 provided in the piston ring 2. A rubber piece 35 is attached to the piston ring 2.

With such a configuration of the check valve 25 ′, when the piston ring 2 moves upward in the air chamber of the cylinder 1, the air flows from the intake hole 22, so that the sphere 23 moves downward, and the intake air Air flows into the piston shaft 3 from the gap between the hole 22 and the sphere 23.

Although the sphere 23 moved downward is supported by the rubber piece 35, the sphere 23 is moved upward by the elastic action of the rubber piece 35 when the piston ring 2 moves downward in the air chamber and is pressed against the intake hole 22. As a result, the intake hole 22 is closed. As a result, the check valve 25 ′ can prevent the backflow of air from the inside of the piston shaft 3 into the air chamber.

When a bicycle or the like, particularly a motorcycle, travels at a high speed (including a bicycle capable of traveling at a high speed), the tire rotates at a high speed, so that the vertical movement of the piston ring 2 is accelerated. Then, it is assumed that the piston shaft 3 cannot sufficiently cope with the air compression work in the cylinder 1.

Therefore, in this embodiment, a configuration of an automatic intake device that can be used even in the case of high-speed traveling is adopted. FIG. 10 schematically shows an example of the structure of the automatic intake device of the fifth embodiment.

The automatic intake device of the fifth embodiment is provided with a cylinder 41 (small cylinder 41) that is slightly smaller in the inside of the cylinder 1, and in the small cylinder 41, the piston ring 2 and the support plate joined to the hollow piston shaft 3 26 is provided.

Therefore, the first air chamber 42 configured inside the small cylinder 41 and the second air chamber 38 configured between the cylinder 1 and the small cylinder 1 are formed.

Further, at least one intake hole 37 is provided above the small cylinder 41. A plate-like rubber ring 36 is preferably attached to the outer surface of the small cylinder 41 as a check valve so as to close the intake hole 37. In the normal state, the plate-like rubber ring 36 closes the air intake hole 37, but passes through the air intake hole 37 from the first air chamber 42 and allows air to flow into the second air chamber 38. Thus, a gap is formed between the intake hole 37 and the plate-like rubber ring 36.

Further, at least one or more intake holes 39 are provided below the small cylinder 41. The intake hole 39 is provided at a position that does not rise above the piston ring 2 even when a pulling spring 43 having one end attached to the support 26 and the other end attached to the bottom wall board 21 is pulled down. It is done. Since the tension spring 43 supports the support 26, the support 26 and the piston ring 2 can be moved up and down along the inner wall of the first air chamber 42 by its elastic action.

Further, at least one or more intake holes 40 are provided in the piston shaft 3. The intake hole 40 passes through the intake hole 39 from the second air chamber 38, and intake air for allowing the air flowing between the support 26 and the bottom wall plate 21 to flow into the hollow piston shaft 3. It is a hole. Therefore, it is good to be provided above the piston shaft 3, preferably at a position between the base 26 and the bottom wall 21 when the piston ring 2 and the base 26 move upward.

The automatic intake device of the fifth embodiment configured as described above is attached to the intake port 7 of a tire of a bicycle such as a motorcycle that runs at high speed. As described above, this attachment is performed by inserting protruding portions such as the swing rod 4 and the piston shaft 3 into the intake port 7 of the tire and screwing the screw portion 18 of the cylinder 1 and the intake port 7 together. Do.

When the automatic intake device is attached for the first time, it is preferable that the buffer body 5 is not in contact with the inner wall of the tire tube, that is, a state in which there is a gap between the tire tube inner wall and the buffer body 5. (It is FIG. 3 that shows the contact state). However, this gap is preferably shorter than the height of the cylinder 1 in the air chamber (the interval between the top wall 11 and the bottom wall portion 12).

However, when the tire air is reduced and the pressure is reduced, the tire is recessed, so that the shock absorber 5 comes into contact with the inner wall of the tire tube as shown in FIG. Then, an upward pressure is generated from the buffer body 5, whereby the piston shaft 3 moves upward in the first air chamber 42 of the small cylinder 41. As a result, the piston ring 2 moves upward along the inner wall side surface of the first air chamber 42.

At this time, since the air is already filled in the first air chamber 42, the plate-like rubber ring 36 is swollen by an elastic action, so that the space between the intake hole 37 and the plate-like rubber ring 36 is increased. A gap is generated, and the air in the first air chamber 42 flows into the second air chamber 38 from the intake hole 37. Since the second air chamber 38 is similarly filled with air, the air flows into the space formed by the support 26 and the bottom wall portion 21 in the small cylinder 41 through the intake hole 39. To do.

Then, when air flows in, the air flows into the piston shaft 3 from the intake hole 40 of the piston shaft 3, and the air is sent from the inside of the piston shaft 3 into the tire tube.

Also, when the tire rotates, the tire near the tube in contact with the shock absorber 5 does not come into contact with the ground. Then, the piston ring 2 is pushed downward by the elastic action of the winding spring 28 and the swinging rod 4. As the piston ring 2 moves downward in the first air chamber 42 of the small cylinder 41, the atmospheric pressure in the first air chamber 42 decreases. Therefore, external air flows from the vent 12 of the intake pipe 9. At this time, since the rubber seal 33 moves downward due to air pressure, air flows into the first air chamber 42 from the vent 12. As a result, the first air chamber 42 is filled with air.

Further, since the air pressure is restored to the original state when the first air chamber 42 is filled with air, the check valve 17 ′ by the tension spring 31 and the rubber seal 33 functions (by the elastic action of the tension spring 31). Because the rubber seal 33 moves upward and closes the vent hole 12), the air in the first air chamber 42 does not flow backward from the first air chamber 42 to the vent hole 12.

By repeating the above action, the tire tube is always automatically refilled with air. In addition, once the buffer body 5 contacts the inner wall of the tire tube, it then contacts the inner wall (the state shown in FIG. 3). However, depending on the length of the protruding portion such as the swing rod 4, the tire tube There may be a gap (the distance of this gap is α) between the inner wall and the buffer 5. In this case, this gap is a condition for allowing the automatic intake device to function.

In Example 5, the first air chamber 42 and the second air chamber 38 were formed by further providing a small cylinder 41 in the cylinder 1. When a bicycle or the like in which an automatic intake device is attached to the intake port 7 of the tire 6 moves at a high speed, the piston ring 2 moves up and down very quickly. By reducing the amount of air, it is possible to improve the efficiency of the air compression work by the piston ring 2.

In the above-described embodiment of the fifth embodiment, the configuration of the check valve 17 ′ including the tension spring 31 and the rubber seal 33 is shown. However, as in the first embodiment, the check valve 17 including the rubber tube 16 and the third embodiment Thus, it can be configured as a check valve 17 ″ by the rubber piece 34 and the rubber seal 33.

In Example 1 to Example 5, as shown in FIG. 10, the lower end portion of the buffer body 5 (the portion in contact with the inner wall of the tire tube) may be formed into a hollow shape. The shock absorber 5 is formed of an elastic body such as synthetic rubber. When the tire near the tire tube with which the shock absorber 5 contacts is grounded by forming the bottom end of the shock absorber 5 into a hollow shape, the shock absorber 5 is shown in FIG. As you can see, it is deformed to flatten.

This makes it possible to disperse the pressure applied to the inner wall of the tire tube by the buffer 5.

In the first to sixth embodiments, the buffer body 5 is attached to the close contact spring as the swing rod 4 as it is, but the buffer body 5 is attached to the lower end portion of the piston shaft 3 as shown in FIG. May be. Therefore, the swing rod 4 only needs to be attached to a part below the winding spring 28 toward the lower end of the piston shaft 3. In this case, at least one or more holes are provided in the vicinity of the lower end portion of the piston shaft 3 for sending air that has flowed into the piston shaft 3 into the tire tube.

Although the automatic intake device according to the first to seventh embodiments is configured to be attached to the intake port 7 of the tire 6, an automatic intake device may be attached to the tire 6 instead of the intake port 7. That is, instead of the conventional intake port 7, the automatic intake device in each of the above-described embodiments may be attached.

The parts constituting the automatic intake device of the first to eighth embodiments are preferably formed of various appropriate materials, and can be appropriately selected from metal and rubber. Each check valve may be in any form as long as the function thereof does not change. The swing rod 4 also swings due to an impact when the tire is unexpectedly deformed by an obstacle or the like. Any material can be used as long as it can be elastically deformed and has excellent restoring force for the purpose of preventing accidents in which 4 breaks.

In addition, the tire size is the same type such as home bicycle, children's bicycle, sports bicycle, etc. The size is also different.

In the automatic intake device in each of the above-described embodiments, it is possible to adjust the length of the piston shaft 3 depending on how tightly the screw portion 18 of the cylinder 1 is attached to the intake port 7 of the tire. Also, the seal pipe 27 is set to be longer than the shaft pipe 20 in advance so that the air seal function functions in accordance with the length of the piston shaft 3.

The automatic intake device for a tire according to the present invention only needs to be attached to the tire intake port by an extremely simple operation to travel, and the tire can always maintain a normal pressure state.

Therefore, the troublesome tire air supply work as in the prior art is omitted, and there are no adverse effects such as puncture accidents and fatigue of both legs induced when running with a decompression tire. Therefore, it is extremely safe and convenient, and when the pressure inside the tire that automatically inhales is set in advance so that a comfortable driving feeling can be obtained by adjusting the length of the swing rod, the enjoyment during driving is outstanding. In addition, since the whole is made compact, it can be provided at a relatively low cost.

For this reason, it is easy for anyone to obtain and is extremely economical. Furthermore, as with conventional air valves, not only can air supply with a manual intake pump be used, but also the objects of use such as motorcycles, wheelchairs, ordinary cars, etc. It is an excellent invention with a very high public interest that can also be applied to.

A: Automatic intake device 1: Cylinder 2: Piston ring 3: Piston shaft 4: Swing rod (contact spring)
5: Shock absorber 6: Tire 7: Air intake 8: Recessed portion 9: Air intake pipe 10: Fitting portion 11: Upper wall 12: Vent 13: Groove 14: Lower end wall 15: Air intake hole 16: Rubber tubes 17, 17 ', 17'': Check valve 18: Screw portion 19: Shaft hole 20: Shaft tube 21: Bottom wall portion 22: Suction hole 23: Spherical body 24: Push spring 25, 25': Check valve 26: Substrate 27 : Seal tube 28: Winding spring 29: Screw part 31: Pulling spring 32: Recess 33: Rubber seal 34: Rubber piece 35: Rubber piece 36: Plate-like rubber ring 37: Air intake hole 38: Second air chamber 39: Air intake hole 40: intake hole 41: small cylinder 42: first air chamber 43: tension spring

Claims

An automatic air intake device that automatically supplies air to the tire tube as the tire rotates,
The automatic intake device is
A shock absorber in contact with the inner wall of the tire tube;
An elastic body for transmitting the force applied to the buffer body;
A hollow piston shaft that moves up and down by the force applied to the elastic body and feeds air into the tire tube;
A hollow cylinder that forms an air chamber by taking in air from a vent that is attached to a tire or a tire intake and is formed to take in air outside the tire;
The piston shaft is joined, and when it moves up and down along the inner wall of the cylinder together with the piston shaft and moves upward, an intake hole is formed to send air in the air chamber into the piston shaft. A provided piston ring, and
The automatic intake device is
When the tire is in contact with the ground, an upward force is generated against the shock absorber in contact with the tire tube near the ground surface,
Due to the upward force, the piston shaft and the piston ring move upward through the elastic body,
During the upward movement, air in the air chamber taken from the intake hole of the piston ring is sent into the piston shaft, so that air is sent from the piston shaft into the tire tube.
An automatic intake device characterized by that.
The automatic intake device further includes:
When the ground contact of the tire in the vicinity of the tire tube with which the buffer body contacts is eliminated,
By the biasing of the elastic body, the piston shaft and the piston ring move downward,
The air in the air chamber is filled by taking external air from the vent into the air chamber by moving the piston ring downward.
The automatic air intake device according to claim 1.
The automatic intake device further includes:
A first check valve for preventing a backflow of air from the air chamber to the vent;
A second check valve for preventing a backflow of air from the inside of the piston shaft to the air chamber in the intake hole;
The automatic intake device according to claim 1 or 2, wherein the automatic intake device is provided.
When the automatic intake device is attached to the intake port of a tire,
On the inner wall side surface of the lower part of the cylinder, a screw part for screwing with the intake port is threaded,
By adjusting the screwed state between the screw portion and the air inlet, the length of the piston shaft can be adjusted.
The automatic intake device according to any one of claims 1 to 3, wherein the automatic intake device is provided.
An automatic air intake device that automatically supplies air to the tire tube as the tire rotates,
The automatic intake device is
A shock absorber in contact with the inner wall of the tire tube;
An elastic body for transmitting the force applied to the buffer body;
A hollow piston shaft that moves up and down by the force applied to the elastic body and feeds air taken in from the first intake hole formed in the upper portion into the tire tube;
A hollow first cylinder that forms a first air chamber that takes in air from a vent formed to take in air outside the tire;
A space which is attached to a tire or an intake port of the tire and includes the first cylinder forms a space between the first cylinder and a second air chamber, and an upper portion of the first cylinder. A hollow second cylinder for taking air from the first air chamber into the second air chamber through a second air intake hole formed in
A piston ring that is joined to the piston shaft and moves up and down along the inner wall of the first cylinder together with the piston shaft;
The automatic intake device is
By causing the tire to contact the ground, an upward force is generated against the shock absorber inscribed with the tire tube near the ground surface,
The piston shaft and the piston ring move the first cylinder upward through the elastic body by the upward force,
During the upward movement, the air in the first air chamber is sent from the second air intake hole to the second air chamber,
The air in the second air chamber is sent into a space below the piston ring of the first cylinder from a third intake hole drilled below the piston ring in the first cylinder,
The air sent into the space is taken into the piston shaft by the piston shaft from the first intake hole, and the air is sent into the tire tube from the piston shaft,
An automatic intake device characterized by that.
The automatic intake device further includes:
When the ground contact of the tire in the vicinity of the tire tube with which the buffer body contacts is eliminated,
By the biasing of the elastic body, the piston shaft and the piston ring move downward,
By moving the piston ring downward, external air is taken into the first air chamber from the vent hole,
Sending the taken-in air into the second air chamber from the second intake hole;
In the first cylinder, air from the second air chamber is fed into a space below the piston ring of the first cylinder from a third intake hole formed below the piston ring in the first cylinder;
Thus, the air in the first air chamber, the second air chamber, and the space is filled.
The automatic air intake apparatus according to claim 5.
The automatic intake device further includes:
A first check valve that prevents backflow of air from the first air chamber to the vent at the vent;
A second check valve for preventing a backflow of air from the second air chamber to the first air chamber in the second intake hole;
The automatic intake device according to claim 5 or 6, wherein the automatic intake device is provided.
When the automatic intake device is attached to the intake port of a tire,
On the inner wall side surface of the lower part of the second cylinder, a screw part for screwing with the intake port is threaded,
By adjusting the screwed state between the screw portion and the air inlet, the length of the piston shaft can be adjusted.
The automatic intake device according to any one of claims 5 to 7, wherein the automatic intake device is provided.
The buffer is
The surface in contact with the tire tube has a hollow shape,
The automatic intake device according to any one of claims 1 to 8, wherein the automatic intake device is provided.
The automatic intake device further includes:
A shaft tube covering a part or all of the outer periphery of the piston shaft;
A seal tube covering a part or all of the outer periphery of the shaft tube,
When attaching the automatic intake device to the intake port of the tire, by preventing the leakage of air from the tire by crimping the seal tube and the intake port,
The automatic intake device according to any one of claims 1 to 9, wherein the automatic intake device is provided.
The buffer is
Attached to the elastic body or piston shaft,
The automatic intake device according to any one of claims 1 to 10, wherein
A tire provided with the automatic air intake device according to any one of claims 1 to 11.
Vehicle equipped with the tire according to claim 12.