【０００１】
【発明の属する技術分野】
本発明は、移動手段に使用する空気充填タイヤの簡易空気圧測定に関する。
【０００２】
【従来の技術】
従来の空気充填タイヤの空気圧はタイヤの空気充填用バルブのキャップを緩めて外し、圧力計を押し当てて測定するかポンプの圧搾空気充填タンクに取り付けられている圧力計の表示を見ながら空気を増減させていた。又自転車等で英式のゴムパイプ使用のバルブは外部からタイヤ内の空気圧を測定出来ない為、タイヤの固さを指で押しておよその空気圧を調べるか又は実際に乗って加重した状態でのタイヤのへこみ具合で大体の空気圧を調べるか、或いは空気充填時にポンプに付いている加圧計で圧力を見ながら充填作業を行っていた。
【０００３】
【発明が解決しようとする課題】
前記のとおりタイヤの空気圧はバルブキャップを外して圧力計を押し当てるのが少なくとも必要な作業であり自転車等の英式バルブは外部からバルブを一時的に解放して空気圧測定する事ができない為、タイヤの固さを指で押してみるか実際に乗って暫く走行してから空気圧不足を知るのが現実であり何れの方式のバルブを持つタイヤも空気圧測定は一般的に煩わしい作業課題となっていた。
【０００４】
【課題を解決するための手段】
前記の問題を解決するため、加重された空気入りタイヤの内圧と接地面積は反比例の関係にある事に着目し、タイヤ転がり方向接地面の距離を測定することである程度タイヤの空気圧を知ることが出来るのではないかと考えた。そこで転がり方向の接地面長を測定するため、平面の台に上からの圧力でオンになるスイッチを直列に等間隔で直線状に取り付けておき、この複数個のスイッチにＬＥＤをそれぞれ接続してスイッチが入るとＬＥＤが点灯するように電源を接続して、直線状に取り付けた複数のスイッチ加圧部分上に平行に加重したタイヤの転がり方向を合わせて置く事でタイヤの転がり方向接地長に比例した個数のＬＥＤが点灯するようにして、点灯したＬＥＤの個数が少ない時はタイヤ空気圧は高く、点灯個数が増加するに従ってタイヤ空気圧の低下を知ることが出来るようにした。
【０００５】
【発明の実施の形態】
前記に簡単な構造説明を含めたが実際の構造としては各種移動手段用のタイヤ加重がスイッチ部分にのるため、丈夫なシート状のスイッチか或いは約１センチ間隔で短冊状に切り込みを入れた２枚のシリコーン接点材等を塗布したプリント基板を向き合わせてスイッチ機能とし、荷重上面側に使用する部材は丈夫なガラス繊維補強材などを使用して加重に耐える丈夫な構造にしてスイッチ上面を更に耐久性のある柔軟性プラスチックかゴムで覆うなど防塵、防水構造にする。バイクや自動車タイヤ等にも使用するモデルでは、ＬＥＤ表示上面や電池収納部分などを堅牢な補強で守り誤ってタイヤが乗り上げても破損しない構造にしておく。
【０００６】
【実施例】
図１と図２は請求項１及び請求項２の構成による本発明装置の使用状態を表しており、図３は図４と図５の回路構成による機種を外から見た各部品の取り付け位置と加重タイヤの測定状態を簡略に表したものである。図６から図９迄は請求項３の乗車したまま一度に前後輪を通過させる事で前後輪の測定結果を同時に記録表示できるようにした機種に関するものである。図４の機種では前項で説明したスイッチの接点１〜６とＣＯＭ．間で直接ＬＥＤを点灯させ、タイヤ空気圧が非常に低く接地長が長い状態では接点ＣＯＭ．と１〜６間が導通してＬＥＤ１〜６が点灯すると同時に接点６につながるＣ１６、Ｒ６、Ｒ７、３８によるハーフショットのタイミング回路により短時間だけブザー駆動用の３９、４０のゲート付きアステーブルオッシレータ回路を動作させＢＺからタイヤの空気圧不足を音で警告する。図４の回路を使用した機種では実際の使用にあたりＬ方向から加重したタイヤをゆっくり進めて行き最初にＬＥＤが点灯開始した値、又はＲ方向から進めて行きＬＥＤが消灯する直前の値が正確な計測値となり、乗車通過型のＬＥＤ測定記録は出来ないがブザー警告機能のみでよい場合は乗車通過型としても使用できる。一般用自転車乗車時のタイヤ接地長は９〜１０センチメートルが適切なタイヤ空気圧とされているので接点３ないし４とＣＯＭ．接点間内側をこの距離にしておけば適切な空気圧を中心にしてＬＥＤ１側方向にＬＥＤ点灯数が減るに従いタイヤ空気圧が高い事を示し逆にＬＥＤ６側方向に点灯数が増加するに従いタイヤ空気圧が低い事を表示させる事ができブザーと共に空気充填時期を警告できる。図５は請求項２で述べた乗車通過による記録表示保持型回路である。この回路は乗車したままタイヤを通過させ記録を一定時間保持しながら表示できるように、最初にタイヤをＣＯＭ．Ｒｅｓｅｔ接点側から進入させる事により、ＣＯＭ．Ｒｅｓｅｔ接点にＶＤＤ電圧が加わり、この部分に接続したＲ２、Ｃ１４、Ｒ３、２７、２８によるハーフショットタイミング回路により発生させた１０ミリセカンド程度のごく短時間のパルス電流によりダイオードを介してＣ１〜Ｃ６を充電する事により、リセットして情報入力待機する。接点１〜６とＣＯＭ．Ｒｅｓｅｔ接点の導通数に従いＮＡＮＤゲートＩＣ８〜１３も反転してＣ１〜Ｃ６を放電し同時にインバーターＩＣ１４〜１９を反転させてＮＡＮＤゲート反転数に等しくＬＥＤ１〜６を点灯保持する。ＣＯＭ．Ｒｅｓｅｔ接点が初めに導通した時ＶＤＤ電圧はＣ１３を充電しインバーターＩＣ２６をＬレベルに保持するがＲ１によりＣ１３の電荷を放電し約３０秒後にＨレベルに反転させる事でＣ１〜Ｃ６を瞬間的に全て充電して３０秒間点灯保持させていたＬＥＤを全て消灯させ電池Ｂからの電流消費を殆どゼロに近いＣ−ＭＯＳ待機電流にする。この機種は一回のタイヤ通過による接地長情報を記録保持するが、３０秒後の消灯を待たずに再びタイヤを通過させると保持されている情報はリセットされ次の情報が記録される事になるため乗車したままゆっくり前後の車輪を通過させるか又は前輪通過後一旦停車させれば、前車輪タイヤの空気圧情報を読む事ができ、その後に通過させた後輪タイヤ空気圧情報は約３０秒間点灯保持するので前後輪の乗車通過測定も不可能ではない、空気圧不足のブザー情報だけでよければＬＥＤ点灯数を確かめる必要がないので前後輪通過型として、一度に前後輪共乗車通過で測定して警告ブザーが鳴らなければ前後タイヤ空気圧は保たれていると解釈する使い方でもよい。図６〜図９に示した請求項３の機種は一回の乗車通過により前後輪のタイヤ空気圧情報を前後輪各々独立させて点灯表示保持するようにしたもので、前述の機種にある測定記録保持及び表示回路を更にもう一組追加し、この回路を最初の前輪測定通過により新たに設けた回路シフト用スイッチＳｈ．によりシフト回路を作動させ３入力ＮＡＮＤゲートＩＣに変えた測定記録保持およびＬＥＤ点灯回路とＲ２、Ｃ１４、Ｒ３、２７〜３０により構成した前後輪回路用にそれぞれ専属動作する二組の記録リセット回路を次に来る後輪通過に備えてシフトするようにしたもので、Ｃ１５、Ｒ４、４１、４２で構成するシフト用タイマー回路を約５秒で反転するようにした。前輪通過により、Ｓｈ．が導通してＣ１５にＶＤＤが加わり充電してインバーターＩＣ４１、４２はそれぞれ反転して、前輪用記録回路ＮＡＮＤゲート１４〜１９の入力をＨからＬに後輪用記録回路ＮＡＮＤゲート２０〜２５の入力をＬからＨレベルに切り換える。Ｒ４によりＣ１５の電荷を放電しながら約５秒間だけＩＣ４１、４２の反転を保持させた後、もとのレベルに戻るようにしておき、前輪通過後５秒以内に後輪の通過も完了させれば前輪測定結果はＬＥＤ１Ｆ〜ＬＥＤ６Ｆに、後輪測定結果をＬＥＤ１Ｒ〜ＬＥＤ６Ｒにそれぞれ記録表示し、約３０秒間経過後ＣＯＭ．Ｒｅｓｅｔ接点からのＶＤＤ電圧によりＣ１３に充電されていた電荷はＲ１により放電され２６が反転する事でＣ１〜Ｃ１２を瞬間的に充電して全てのＬＥＤを消灯させ、電池Ｂの電流消費を殆どゼロに近いＣ−ＭＯＳ待機電流にする。タイヤの低空気圧状態を示すＬＥＤ５Ｆと６Ｆ又はＬＥＤ５Ｒと６Ｒが点灯した時はＣ１６、Ｃ１７、Ｒ５、Ｒ６、Ｒ７及び３７、３８のＩＣによるハーフショットのタイミング回路により短時間だけブザー駆動用の３９、４０のゲート付きアステーブルオッシレータ回路を動作させＢＺから前後輪のタイヤ通過タイミングに伴い空気圧不足を音で警告する。バイク、自動車等のタイヤは一度適正空気圧を空気圧計で測定した状態のタイヤに本装置を使用してＬＥＤ点灯数と空気圧の相関関係を記憶しておけばタイヤ空気圧の目安とする事も可能であり、トラックなど空荷状態の正常空気圧タイヤでのＬＥＤ点灯数を記録しておけば、おおよその積載荷重を知る事も可能である。なお請求項１、２、３で述べた全ての方式に使用する測定結果表示はＬＥＤに限定することなく電球、液晶、７セグメント、各種オーディオ音、音声などによる情報伝達方式に変更しても差し支えなく本発明の目的機能を果たす。
【０００７】
【発明の効果】
本発明装置は、乗車したまま本装置の上をただ通過するだけで誰にでも簡単に空気入りタイヤ空気圧の過不足を判定することができるもので、空気圧不足の判定結果が出た時はブザー警告音を加えて空気ポンプでの充填を促す機能も備えた。従来より日本国内で使用されている自転車タイヤの殆どが、英式バルブを使用している関係上、空気圧計を使ってタイヤ空気圧を簡単に測定する事はできない、指でタイヤを押してみるか実際に乗車してみるなど感覚に頼る方法で空気圧のチェックを行っていた。もう少し再現性があり簡単に数値化できて経験不要の方法でタイヤ空気圧の過不足判定はできないものかと考えだされたのが本発明であり自転車をいつも使用する通勤通学、郵便局や警察、新聞など各種配達業務従事者の駐輪場出発点や到着点通路に置いて本装置の上を乗車したまま通過するだけで簡単にタイヤ空気圧を判定できる、特にこのような用途向けには防水耐久機種を作り自転車通路に埋設設置方式としてもよい。電子回路を含めた構造をできるだけ簡素化したため安価に商品化が可能である。使用にあたり電源スイッチの操作は一切不要でタイヤを通過させれば電源が自動的に入り使用を終えれば自動的に電源が切れる回路方式にした。表示には電流消費の少ないＬＥＤを使用する事により電池は毎日使用しても数年間は交換の必要がない。故障なく長年経済的に使用できるようにした本装置は、タイヤの空気圧不足が誘発するパンクや事故を未然に防ぐ為のタイヤ空気圧判定装置を多くの人たちに向け提供するものである。
【図面の簡単な説明】
【図１】本発明実施例の自転車タイヤ使用例
【図２】本発明実施例の自動車タイヤ使用例
【図３】請求項１及び請求項２実施例の各部品配置とタイヤ接地長測定
【図４】請求項１実施例の回路図
【図５】請求項２実施例の回路図
【図６】請求項３実施例の各部品配置と外観
【図７】請求項３実施例の使用状態
【図８】請求項３実施例とタイヤ接地長測定
【図９】請求項３実施例の回路図
【符号の説明】
１〜６ センサースイッチ
ＣＯＭ．（Ｒｅｓｅｔ）コモン（リセット）用センサースイッチ
Ｓｈ． シフト回路用センサースイッチ
ＳＷ．ＰＡＤ センサースイッチ面
８〜４０ 半導体ＩＣ
ＬＥＤ１Ｆ〜６Ｆ 前輪測定結果表示用ＬＥＤ
ＬＥＤ１Ｒ〜６Ｒ 後輪測定結果表示用ＬＥＤ
Ｃ１〜Ｃ１７ コンデンサー
Ｒ１〜Ｒ７ 固定抵抗器
ＢＺ セラミックブザー
Ｂ ３Ｖ電池
ＴＩＲＥ タイヤ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a simple air pressure measurement of a pneumatic tire used for a moving means.
[0002]
[Prior art]
The air pressure of a conventional air-filled tire can be measured by loosening the cap of the air-filling valve of the tire and removing it by pressing the pressure gauge or by reading the pressure on the pressure gauge attached to the compressed air-fill tank of the pump. Had been increased or decreased. In addition, since the pressure of the tire inside the tire cannot be measured from the outside with a valve using an English rubber pipe for bicycles etc., check the approximate air pressure by pressing the hardness of the tire with your finger, or check the tire pressure in the state where it is actually loaded and loaded. The filling operation was performed while checking the approximate air pressure by the degree of dent or by checking the pressure with a pressure gauge attached to the pump when filling the air.
[0003]
[Problems to be solved by the invention]
As mentioned above, the air pressure of the tire is at least necessary work to remove the valve cap and press the pressure gauge, and English valves such as bicycles can not release the valve temporarily from the outside and measure the air pressure, It is actually a matter of pushing the hardness of the tire with a finger or actually riding for a while and then knowing the insufficiency of the pressure and then knowing the insufficiency of the pressure.Tire measurement with any type of valve is generally a troublesome work task .
[0004]
[Means for Solving the Problems]
In order to solve the above problem, paying attention to the fact that the internal pressure of the weighted pneumatic tire and the contact area are in inverse proportion, it is possible to know the tire pressure to some extent by measuring the distance of the tire rolling direction contact surface. I thought I could do it. Therefore, in order to measure the length of the grounding surface in the rolling direction, switches that are turned on by pressure from above are mounted in a straight line at equal intervals on a flat base, and LEDs are connected to these switches. Connect the power supply so that the LED lights up when the switch is turned on, and place the tires in the rolling direction of the tire in parallel with the rolling direction of the tires, which are weighted in parallel, on a plurality of linearly mounted switch press parts. A proportional number of LEDs are turned on, so that when the number of lit LEDs is small, the tire pressure is high, and as the number of lit LEDs increases, a decrease in tire pressure can be known.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
Although a simple structure explanation was included above, the actual structure was a strong sheet-like switch or a strip cut at about 1 cm intervals because the tire weight for various moving means was placed on the switch part. The printed circuit board coated with two silicone contact materials faces each other to provide a switch function, and the upper surface of the load is made of a durable structure that can withstand the load by using a durable glass fiber reinforced material. In addition, a dustproof and waterproof structure such as covering with durable flexible plastic or rubber is adopted. In models that are also used for motorcycles and automobile tires, the upper surface of the LED display and the battery housing are protected by robust reinforcement so that they are not damaged even if the tire accidentally rides on.
[0006]
【Example】
1 and 2 show the state of use of the device according to the present invention according to the first and second aspects of the present invention, and FIG. 3 shows the mounting position of each component as viewed from the outside of the model according to the circuit configuration of FIGS. And the measurement state of the weighted tire is simply shown. FIGS. 6 to 9 relate to a model according to claim 3 in which the measurement result of the front and rear wheels can be simultaneously recorded and displayed by passing the front and rear wheels at once while riding. In the model shown in FIG. 4, the contacts 1 to 6 of the switch and the COM. When the tire pressure is very low and the contact length is long, the contact COM. As a result, the half-shot timing circuit of C16, R6, R7, and 38 connected to the contact 6 at the same time that the LEDs 1 to 6 are turned on and the LEDs 1 to 6 are turned on, and the gated astable oscillators 39 and 40 for driving the buzzer for a short time. The BZ alerts the tire pressure insufficiency from the BZ. In the model using the circuit of FIG. 4, in actual use, the value at which the weighted tire is slowly advanced from the L direction and the LED starts to light first, or the value immediately before the LED is turned off when the weight is advanced from the R direction is accurate. It becomes a measured value, and the boarding type LED measurement record cannot be performed. However, if only the buzzer warning function is sufficient, the boarding type can be used. Since the appropriate tire pressure is set to 9 to 10 cm for the tire contact length when riding a general bicycle, the contact points 3 to 4 and COM. If the distance between the contact points is set to this distance, the tire air pressure increases as the number of lighted LEDs decreases toward the LED 1 centering on the appropriate air pressure. Conversely, the tire air pressure decreases as the number of lighted lights increases toward the LED 6 side This can be displayed and a warning of the air filling time can be given together with the buzzer. FIG. 5 shows a circuit for holding and displaying a record by passing through a vehicle as described in the second aspect. The circuit first passes the tire through the COM. By entering from the Reset contact side, COM. A VDD voltage is applied to the Reset contact, and a very short pulse current of about 10 milliseconds generated by a half shot timing circuit composed of R2, C14, R3, 27, and 28 connected to this portion causes a short-circuit pulse current of C1 to C6 via diodes. Is charged to reset and wait for information input. Contacts 1 to 6 and COM. The NAND gates IC8 to 13 are also inverted according to the number of conduction of the Reset contact, and the C1 to C6 are discharged, and the inverters IC14 to 19 are also inverted at the same time, and the LEDs 1 to 6 are turned on and held equal to the NAND gate inversion number. COM. When the reset contact first conducts, the VDD voltage charges C13 and holds the inverter IC 26 at the L level, but discharges the charge of C13 by R1 and inverts it to the H level after about 30 seconds, thereby instantaneously changing C1 to C6. All the LEDs that have been charged and kept on for 30 seconds are turned off, and the current consumption from the battery B is reduced to a C-MOS standby current almost zero. This model records and retains the contact length information from one pass of the tire, but if the tire is passed again without waiting for the lights to be turned off after 30 seconds, the retained information is reset and the next information is recorded. Therefore, if you pass the front and rear wheels slowly while riding, or stop once after passing the front wheel, you can read the tire pressure information of the front wheel tires, and the rear wheel tire pressure information passed after that lights up for about 30 seconds It is not impossible to measure the passing of the front and rear wheels because it is held.If only the buzzer information of insufficient air pressure is enough, it is not necessary to check the number of LED lighting. If the warning buzzer does not sound, the front and rear tire pressures may be interpreted as being maintained. The model according to claim 3 shown in FIGS. 6 to 9 is configured so that the tire pressure information of the front and rear wheels is independently lit and displayed for each of the front and rear wheels by one pass of the boarding, and the measurement record in the aforementioned model is obtained. Another set of holding and display circuits is added, and this circuit is newly provided by a circuit shift switch Sh. The two sets of record reset circuits that operate exclusively for the front and rear wheel circuits constituted by R2, C14, R3, and 27 to 30, and the measurement record holding and LED lighting circuit, which is changed to a three-input NAND gate IC by activating the shift circuit. The shift is performed in preparation for the next rear wheel passing, and the shift timer circuit composed of C15, R4, 41, and 42 is inverted in about 5 seconds. Sh. Is turned on, VDD is applied to C15 and charged, and the inverter ICs 41 and 42 are respectively inverted and the input of the front-wheel recording circuit NAND gates 14 to 19 is changed from H to L to the input of the rear-wheel recording circuit NAND gates 20 to 25. Is switched from L to H level. After discharging the charge of C15 by R4, the inversion of the ICs 41 and 42 is held for only about 5 seconds, and then the level is returned to the original level, and the passage of the rear wheel is completed within 5 seconds after passing the front wheel. For example, the front wheel measurement results are recorded and displayed on the LEDs 1F to 6F, and the rear wheel measurement results are recorded and displayed on the LEDs 1R to 6R. The electric charge charged to C13 by the VDD voltage from the reset contact is discharged by R1 and 26 is inverted, thereby instantaneously charging C1 to C12, turning off all the LEDs, and making the current consumption of the battery B almost zero. C-MOS standby current close to When the LEDs 5F and 6F or the LEDs 5R and 6R, which indicate the low air pressure state of the tire, are lit, the buzzer drive 39 for a short time is provided by the half-shot timing circuit by the IC of C16, C17, R5, R6, R7 and 37, 38. The gated astable oscillator circuit of 40 is operated to warn a sound of insufficient air pressure from the BZ as the tires pass between the front and rear wheels. For tires of motorcycles, automobiles, etc., it is also possible to use this device for tires whose proper air pressure has been measured with an air pressure gauge once and store the correlation between LED lighting number and air pressure as a guide for tire air pressure. Yes, it is also possible to know the approximate load by recording the number of LEDs lit on an empty pneumatic tire such as a truck. The display of the measurement results used in all the methods described in claims 1, 2, and 3 is not limited to the LED, and may be changed to an information transmission method using a light bulb, a liquid crystal, 7 segments, various audio sounds, voices, and the like. Rather, it fulfills its intended function.
[0007]
【The invention's effect】
The device of the present invention allows anyone to easily determine whether the pneumatic tire pressure is excessive or insufficient simply by passing over the device while riding. It also has a function to add a warning sound to prompt filling with an air pump. Most of the bicycle tires that have been used in Japan until now use English valves, so it is not possible to easily measure the tire pressure using an air pressure gauge. The air pressure was checked in a way that relied on the senses, such as trying to get on the car. It was the present invention that it was possible to judge whether the tire pressure is excessive or insufficient by a method that is a little more reproducible and can be easily digitized and does not require experience, it is the present invention, commuting to school always using bicycles, post office, police, newspaper The tire pressure can be easily determined by simply placing the bicycle at the departure point or the arrival point passage of various delivery workers at the departure point or arrival point passage while riding on this device.Especially for such applications, create a waterproof and durable model It may be buried in the bicycle passage. Since the structure including the electronic circuit is simplified as much as possible, commercialization is possible at low cost. There is no need to operate the power switch at the time of use, and the power is automatically turned on when the tire is passed and the power is automatically turned off when the use is completed. By using LEDs with low current consumption for display, the batteries do not need to be replaced for several years even if they are used every day. This device, which can be used economically for many years without failure, provides a tire pressure judging device for many people to prevent a puncture or accident caused by insufficient tire pressure.
[Brief description of the drawings]
FIG. 1 is an example of using a bicycle tire according to an embodiment of the present invention. FIG. 2 is an example of using a vehicle tire according to an embodiment of the present invention. FIG. [4] Circuit diagram of the first embodiment [Fig. 5] [Circuit diagram of the second embodiment] [Fig. 6] Arrangement and appearance of each part of the third embodiment [Fig. 7] Usage state of the third embodiment [ FIG. 8: Third embodiment and measurement of tire contact length [FIG. 9] Circuit diagram of third embodiment [Explanation of reference numerals]
1-6 sensor switch COM. (Reset) Common (reset) sensor switch Sh. Sensor switch for shift circuit SW. PAD Sensor switch surface 8-40 Semiconductor IC
LED1F ～ 6F LED for front wheel measurement result display
LED1R ～ 6R LED for displaying rear wheel measurement result
C1 to C17 Capacitors R1 to R7 Fixed resistor BZ Ceramic buzzer B 3V battery TIRE Tire
