JP2003090718A - Inner diameter measuring implement - Google Patents
Inner diameter measuring implementInfo
- Publication number
- JP2003090718A JP2003090718A JP2001285273A JP2001285273A JP2003090718A JP 2003090718 A JP2003090718 A JP 2003090718A JP 2001285273 A JP2001285273 A JP 2001285273A JP 2001285273 A JP2001285273 A JP 2001285273A JP 2003090718 A JP2003090718 A JP 2003090718A
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- inner diameter
- diameter
- measuring
- fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000003780 insertion Methods 0.000 claims abstract description 29
- 230000037431 insertion Effects 0.000 claims abstract description 29
- 239000012530 fluid Substances 0.000 claims description 20
- 238000005507 spraying Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Landscapes
- A Measuring Device Byusing Mechanical Method (AREA)
- Measuring Arrangements Characterized By The Use Of Fluids (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、開口部などの内径
を測定する内径測定具に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner diameter measuring tool for measuring the inner diameter of an opening or the like.
【０００２】[0002]
【従来の技術】従来、被測定物に設けられた穴の内径を
測定する際には、図３に示すような内径測定具１０１が
用いられていた。2. Description of the Related Art Conventionally, an inner diameter measuring tool 101 as shown in FIG. 3 has been used when measuring the inner diameter of a hole provided in an object to be measured.
【０００３】この内径測定装置１０１は、エアが通流さ
れる筒状の基部１１１と、該基部１１１の先端に設けら
れ、前記穴に挿入される挿入部としてのヘッド１１２と
により構成されている。The inside diameter measuring device 101 is composed of a cylindrical base portion 111 through which air flows, and a head 112 which is provided at the tip of the base portion 111 and is inserted into the hole as an insertion portion.
【０００４】該ヘッド１１２には、図４の（ａ）に示す
ように、前記基部１１１内に連通する連通孔１３１が形
成されており、先端側部には、対向した二箇所に長方形
状の凹部１３２，１３２が形成されている。該凹部１３
２，１３２には、内部に連通する排出穴１３３，１３３
が開設されており、該排出穴１３３，１３３は、前記凹
部１３２，１３２に設けられた下動舌片１３４，１３４
によって閉鎖されている。As shown in FIG. 4 (a), the head 112 is formed with a communication hole 131 which communicates with the inside of the base portion 111, and the tip end side portion has a rectangular shape at two opposite locations. Recesses 132, 132 are formed. The recess 13
2, 132 have discharge holes 133, 133 communicating with the inside.
Is opened, and the discharge holes 133, 133 have the lower moving tongue pieces 134, 134 provided in the recesses 132, 132, respectively.
Is closed by.
【０００５】この下動舌片１３４は、図４の（ｂ）に示
すように、先端部に側方に突出した半球状の接触子１４
１が設けられており、可撓性を有した薄肉部１４２の基
端側には、圧肉の固定部１４３が形成されている。この
固定部１３４が前記凹部１３２に密着して固定されるこ
とで、先端部が前記排出穴１３３を密閉するように構成
されており、前記基部１１１から供給されるエアによっ
て前記接触子１４１を側方へ押し出し、被測定物の穴の
内周面に当接できるように構成されている。そして、こ
の時の背圧を測定することで、前記穴の内径を測定でき
るように構成されている。As shown in FIG. 4 (b), the lower moving tongue piece 134 has a hemispherical contactor 14 which laterally protrudes from the tip.
1 is provided, and a fixed portion 143 having a thin wall is formed on the base end side of the thin portion 142 having flexibility. The fixing portion 134 is configured to closely contact and be fixed to the concave portion 132, so that the distal end portion seals the discharge hole 133, and the air supplied from the base portion 111 causes the contactor 141 to move to the side. It is configured so that it can be pushed out toward the inner peripheral surface of the hole of the object to be measured. Then, by measuring the back pressure at this time, the inner diameter of the hole can be measured.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、このよ
うな内径測定具１０１にあっては、穴内に挿入されるヘ
ッド１１２の側面に板状の下動舌片１３４を配置する必
要があるため、小径化が困難であった。これにより、小
径穴を測定することができなかった。However, in such an inside diameter measuring tool 101, since it is necessary to dispose the plate-like lower moving tongue piece 134 on the side surface of the head 112 inserted into the hole, a small diameter is required. Was difficult to convert. This made it impossible to measure small holes.
【０００７】また、ヘッド１１２の先端側部に、前記下
動舌片１３４を固定するための凹部１３２を正確な位置
に正確な深さで形成する必要があり、成形に苦労を要し
た。Further, it is necessary to form a concave portion 132 for fixing the lower moving tongue piece 134 at an accurate position and an accurate depth on the tip side portion of the head 112, which makes molding difficult.
【０００８】本発明は、このような従来の課題に鑑みて
なされたものであり、製造容易性を確保しつつ、小径穴
の測定を可能とする内径測定具を提供することを目的と
するものである。The present invention has been made in view of such conventional problems, and an object thereof is to provide an inner diameter measuring instrument capable of measuring a small diameter hole while ensuring the easiness of manufacture. Is.
【０００９】[0009]
【課題を解決するための手段】前記課題を解決するため
に本発明の請求項１の内径測定具にあっては、測定対象
の開口部に挿入される挿入部を備えた内径測定具におい
て、前記挿入部から側方へ突出し、内側へ後退自在に設
けられた球状の接触子と、前記挿入部内にその長さ方向
へ移動自在に収容され、前記接触子に接する部位が先端
へ向かうに従って縮径したシャフトと、該シャフトを先
端方向へ付勢する付勢手段と、前記挿入部より延出した
前記シャフトの基端面に流体を吹き付ける供給路と、該
供給路へ前記流体を供給する供給部と、を備えている。In order to solve the above-mentioned problems, the inner diameter measuring instrument according to claim 1 of the present invention comprises an inner diameter measuring instrument having an insertion portion to be inserted into an opening to be measured, A spherical contactor that projects laterally from the insertion portion and is provided so as to be retractable inward, and is accommodated in the insertion portion so as to be movable in the length direction thereof, and the portion contacting the contactor is contracted toward the tip. Diameter shaft, urging means for urging the shaft in the distal direction, supply passage for blowing fluid to the base end face of the shaft extending from the insertion portion, and supply portion for supplying the fluid to the supply passage And are equipped with.
【００１０】すなわち、測定対象の開口部に挿入される
挿入部には、シャフトが移動自在に設けられており、該
シャフトには、球状の接触子に接する部位が、先端へ向
かうに従って縮径されている。そして、このシャフト
は、付勢手段によって先端方向へ付勢されている。この
ため、前記接触子は、シャフトの縮径部分に沿って側方
へ押圧され突出される。That is, a shaft is movably provided in an insertion portion to be inserted into an opening to be measured, and a portion of the shaft which is in contact with a spherical contactor is reduced in diameter toward the tip. ing. The shaft is urged in the tip direction by the urging means. Therefore, the contactor is pushed laterally along the reduced diameter portion of the shaft and protrudes.
【００１１】この挿入部が前記開口部へ挿入された際に
は、前記接触子が開口部の内周面に当接し、開口部の内
径に応じて内側へ後退する。これにより、前記シャフト
は基端側へ移動され、前記挿入部より延出したシャフト
の基端面は、その移動量に応じて変位する。すると、こ
の基端面と該基端面に流体を吹き付ける供給路間の隙間
が変化するため、当該供給路へ前記流体を供給する供給
部における背圧が、前記間隙の変化量に応じて変化す
る。したがって、前記背圧変化を計測することで、前記
開口部の内径が測定される。When the insertion portion is inserted into the opening, the contactor comes into contact with the inner peripheral surface of the opening and retracts inward according to the inner diameter of the opening. As a result, the shaft is moved toward the base end side, and the base end face of the shaft extending from the insertion portion is displaced according to the amount of movement. Then, the gap between the base end face and the supply passage that blows the fluid onto the base end face changes, so that the back pressure in the supply unit that supplies the fluid to the supply passage changes according to the amount of change in the gap. Therefore, the inner diameter of the opening is measured by measuring the change in the back pressure.
【００１２】このように、測定対象の開口部に挿入され
る挿入部内に、球状の接触子に接する縮径部分を有した
シャフトを設けるだけで、内径測定具が構成される。As described above, the inner diameter measuring tool is constructed only by providing the shaft having the reduced diameter portion in contact with the spherical contact piece in the insertion portion inserted into the opening to be measured.
【００１３】また、請求項２の内径測定具においては、
前記供給路を筒状部材で構成し、該筒状部材の基端部
に、前記流体を供給するとともに該流体の背圧を測定す
るセンサの取付部を形成し、当該筒状部材の先端部に前
記流体を噴出する噴出部を設ける一方、前記シャフトの
基端部に、該シャフトより大径の受圧部を設け、該受圧
部と前記筒状部材間にスプリングを設けて前記付勢手段
を構成した。Further, in the inner diameter measuring instrument according to claim 2,
The supply path is formed of a tubular member, and a mounting portion for a sensor that supplies the fluid and measures the back pressure of the fluid is formed at the base end portion of the tubular member, and the distal end portion of the tubular member. On the one hand, a jetting portion for jetting the fluid is provided on the other hand, and on the other hand, a pressure receiving portion having a diameter larger than that of the shaft is provided at the base end portion of the shaft, and a spring is provided between the pressure receiving portion and the tubular member to provide the biasing means. Configured.
【００１４】すなわち、前記供給路を筒状部材で構成
し、該筒状部材の基端部にセンサの取付部が形成されて
いる。このため、このセンサで前記供給部から供給され
る流体の背圧を測定することにより、測定対象の開口部
の内径を測定することができる。That is, the supply passage is formed of a tubular member, and the sensor mounting portion is formed at the base end of the tubular member. Therefore, by measuring the back pressure of the fluid supplied from the supply unit with this sensor, the inner diameter of the opening to be measured can be measured.
【００１５】また、筒状部材の噴出部からの流体は、前
記シャフトに設けられた大径の受圧部に噴出されるの
で、小径のシャフトの基端面に流体が噴出される場合と
比較して、背圧による測定精度が高められる。さらに、
この大径の受圧部は、付勢手段を構成するスプリングの
受け面として利用される。Further, since the fluid from the ejection portion of the tubular member is ejected to the large-diameter pressure receiving portion provided on the shaft, compared with the case where the fluid is ejected to the base end surface of the small-diameter shaft. , The measurement accuracy by back pressure is improved. further,
This large-diameter pressure receiving portion is used as a receiving surface of a spring that constitutes the urging means.
【００１６】[0016]
【発明の実施の形態】以下、本発明の一実施の形態を図
に従って説明する。図１は、本実施の形態にかかる内径
測定具１を示す図であり、該内径測定具１は、測定対象
物２の開口部３における内径を測定する装置である。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an inner diameter measuring tool 1 according to the present embodiment. The inner diameter measuring tool 1 is a device for measuring an inner diameter of an opening 3 of an object to be measured 2.
【００１７】この内径測定具１は、Ｌ字ブラケット１１
にボルト１２，１２で固定された測定具本体１３を備え
てなり、該測定具本体１３は、中空状に形成されてい
る。この測定具本体１３の下端部には、ねじ穴１４が形
成されており、該ねじ穴１４には、挿入部１５の基端に
設けられたねじ部１６が螺入された状態で固定されてい
る。This inner diameter measuring tool 1 includes an L-shaped bracket 11
The measuring tool main body 13 is fixed to the shaft with bolts 12 and 12, and the measuring tool main body 13 is formed in a hollow shape. A screw hole 14 is formed in the lower end of the measuring tool main body 13, and a screw portion 16 provided at the base end of the insertion portion 15 is screwed into the screw hole 14 and fixed. There is.
【００１８】この挿入部１５は、測定対象物２の開口部
３に挿入され、該開口部３の内径を測定するものであ
り、前記ねじ部１６より突出した中径のストッパー２１
から小径の測定部２２が延設されている。この挿入部１
５は、図中下方の先端が閉鎖された中空状に形成されて
おり、図２にも示すように、内部空間２３は、図中上方
へ開口している。The insertion portion 15 is inserted into the opening 3 of the object 2 to be measured and measures the inner diameter of the opening 3. The insertion portion 15 has a medium diameter stopper 21 protruding from the screw portion 16.
A measuring part 22 having a small diameter is extended from. This insertion part 1
5 is formed in a hollow shape with its lower end closed in the figure, and as shown in FIG. 2, the internal space 23 opens upward in the figure.
【００１９】前記測定部２２の側部には、対向した二箇
所に円形穴３１，３１が開設されており、両円形穴３
１，３１は、前記内部空間２３に連通している。各円形
穴３１，３１には、球状の接触子３２，３２が保持され
ており、各接触子３２，３２は、前記測定部２２の外側
面より側方へ突出するとともに、内側へ後退自在に設け
られている。Circular holes 31 and 31 are provided at two opposite sides on the side of the measuring section 22.
1, 31 communicate with the internal space 23. Spherical contacts 32, 32 are held in the circular holes 31, 31, respectively, and the contacts 32, 32 project laterally from the outer surface of the measuring section 22 and can retract backwards. It is provided.
【００２０】また、前記内部空間２３には、小径棒状の
シャフト４１が上下動自在に収容されている。該シャフ
ト４１の図中下端の先端部には、先端へ向かうに従って
外径寸法が小さくなる先細り形状のテーパ部４２が形成
されており、該テーパ部４２の傾斜した側面に前記各接
触子３２，３２が摺接するように構成されている。A small-diameter rod-shaped shaft 41 is vertically movably housed in the internal space 23. A tapered taper portion 42 having an outer diameter size that decreases toward the tip is formed at the tip end of the lower end of the shaft 41 in the figure, and each of the contacts 32, 32 is formed on the inclined side surface of the taper portion 42. 32 is configured to be in sliding contact.
【００２１】このシャフト４１は、図中上部側の基端部
５１が前記挿入部１５のねじ部１６より上方へ突出する
長さ寸法に設定されており、この基端部５１には、図１
に示したように、当該シャフト４１より大径の受圧部５
２が嵌着固定されている。該受圧部５２には、その上端
に更に大径の平面部５３が形成されている。The shaft 41 is set to have such a length that a base end portion 51 on the upper side in the figure projects upward from the threaded portion 16 of the insertion portion 15, and the base end portion 51 has a length dimension as shown in FIG.
As shown in FIG.
2 is fitted and fixed. The pressure receiving portion 52 has a flat portion 53 having a larger diameter formed at the upper end thereof.
【００２２】また、前記測定具本体１３には、その上端
よりカラー６１を介して供給路を構成する筒状部材６２
が挿入された状態で固定されている。該筒状部材６２の
下端部には、小径の嵌着部６３が形成されており、該嵌
着部６３には、付勢部材としてのコイルスプリング６４
の一端部が外嵌した状態で保持されている。このコイル
スプリング６４の他端は、前記挿入部１５に設けられた
受圧部５２の平面部５３に当接されており、当該挿入部
１５は下方へ向けて付勢されている。前記嵌着部６３か
らは、小径筒状の噴出部６５が下方へ向けて延出してお
り、該噴出部６５の下端と前記受圧部５２の平面部５３
との間には、僅かな隙間が維持されるように設定されて
いる。Further, the measuring tool main body 13 has a cylindrical member 62 which constitutes a supply path from the upper end thereof via a collar 61.
Is fixed in the inserted state. A fitting portion 63 having a small diameter is formed at a lower end portion of the tubular member 62, and the fitting portion 63 has a coil spring 64 as a biasing member.
Is held in a state in which one end of the is externally fitted. The other end of the coil spring 64 is in contact with the flat surface portion 53 of the pressure receiving portion 52 provided in the insertion portion 15, and the insertion portion 15 is biased downward. A small-diameter cylindrical ejection portion 65 extends downward from the fitting portion 63, and the lower end of the ejection portion 65 and the flat surface portion 53 of the pressure receiving portion 52.
Is set so that a slight gap is maintained between the and.
【００２３】前記筒状部材６２の上端部は、前記測定部
本体１３より上方へ突出するように構成されており、こ
の上端には、前記噴出部６５へ貫通する供給部としての
供給穴７１が開設されている。この上端部には、図外の
接続ホースを嵌着できるように構成されており、その周
面には抜け止め用の段部７２，・・・が設けられてお
り、取付部７３が形成されている。前記接続ホースは、
エアマイクロメータからなる差圧センサ７４に接続され
ており、該差圧センサ７４は、前記接続ホースを介し
て、前記筒状部材６２へ空気を供給し、前記噴出部６５
から噴出させる一方、該噴出部６５と前記受圧部５２の
平面部５３との離間距離に応じて変化する背圧を測定で
きるように構成されている。An upper end portion of the tubular member 62 is constructed so as to project upward from the measuring portion main body 13, and a supply hole 71 as a supply portion penetrating to the ejection portion 65 is formed at the upper end thereof. It has been opened. A connection hose (not shown) can be fitted to the upper end portion, and a step portion 72 for preventing slip-off is provided on the peripheral surface thereof, and a mounting portion 73 is formed. ing. The connection hose is
It is connected to a differential pressure sensor 74 composed of an air micrometer, and the differential pressure sensor 74 supplies air to the tubular member 62 via the connection hose, and the ejection portion 65.
On the other hand, the back pressure that changes depending on the distance between the ejection portion 65 and the flat surface portion 53 of the pressure receiving portion 52 can be measured while being ejected from the back.
【００２４】以上の構成にかかる本実施の形態におい
て、測定対象物２の開口部３に挿入される挿入部１５に
は、シャフト４１が上下動自在に収容されており、該シ
ャフト４１には、球状の接触子３２，３２に接する先端
部に、先端へ向かうに従って縮径したテーパ部４２が形
成されている。そして、このシャフト４１は、付勢手段
としてのコイルスプリング６４によって先端方向へ付勢
されている。このため、球状の前記接触子３１，３１
は、シャフト４１のテーパ部４２に沿って側方へ押圧さ
れ突出される。In the present embodiment having the above-mentioned structure, the shaft 41 is vertically movably housed in the insertion portion 15 which is inserted into the opening 3 of the measuring object 2, and the shaft 41 is movable in the vertical direction. A taper portion 42 having a diameter reduced toward the tip is formed at the tip end portion in contact with the spherical contacts 32, 32. The shaft 41 is biased toward the tip by a coil spring 64 as a biasing means. Therefore, the spherical contacts 31, 31
Are pushed and projected laterally along the tapered portion 42 of the shaft 41.
【００２５】この挿入部１５を前記開口部３へ挿入した
際には、前記接触子３１，３１が開口部３の内周面３ａ
に当接し、開口部３の内径に応じて内側へ後退する。こ
れにより、前記シャフト４１は基端側（図中上方）へ移
動され、前記挿入部１５より延出したシャフト４１の基
端部５１及び該基端部５１に嵌着固定された受圧部５２
は、その移動量に応じて変位する。すると、この受圧部
５２の平面部５３と該平面部５３に空気を吹き付ける筒
状部材６２の噴出部６５間の隙間が変化するため、筒状
部材６２へ空気を供給する供給穴７１における背圧が、
前記間隙の変化量に応じて変化する。When the insertion portion 15 is inserted into the opening portion 3, the contacts 31 are brought into contact with the inner peripheral surface 3 a of the opening portion 3.
And then retracts inward according to the inner diameter of the opening 3. As a result, the shaft 41 is moved to the base end side (upward in the drawing), the base end portion 51 of the shaft 41 extending from the insertion portion 15 and the pressure receiving portion 52 fitted and fixed to the base end portion 51.
Moves according to the amount of movement. Then, the gap between the flat surface portion 53 of the pressure receiving portion 52 and the ejection portion 65 of the tubular member 62 that blows air onto the flat surface portion 53 changes, so that the back pressure in the supply hole 71 that supplies air to the tubular member 62 is changed. But,
It changes according to the amount of change in the gap.
【００２６】これにより、供給穴７１を有する取付部７
３に接続ホースを介して接続された差圧センサ７４にて
前記背圧変化を計測することで、前記開口部３の内径を
測定することができる。As a result, the mounting portion 7 having the supply hole 71
The inner diameter of the opening 3 can be measured by measuring the back pressure change with the differential pressure sensor 74 connected to the No. 3 via a connection hose.
【００２７】このように、測定対象物２の開口部３に挿
入される挿入部１５内に、球状の接触子３２，３２に接
するテーパ部４２を有したシャフト４１を収容するだけ
で、内径測定具１を構成することができる。As described above, the inner diameter is measured only by accommodating the shaft 41 having the tapered portion 42 in contact with the spherical contacts 32, 32 in the insertion portion 15 inserted into the opening 3 of the measuring object 2. The tool 1 can be configured.
【００２８】このため、前記接触子３２，３２及び前記
シャフト４１を小径化することにより、前記挿入部１５
の小径化が可能となる。したがって、開口部３に挿入さ
れるヘッドの側面に板状の下動舌片を配設しなければな
らなかった従来と比較して、小径化が可能となり、小径
の開口部３の測定を実現することができる。Therefore, by reducing the diameters of the contacts 32, 32 and the shaft 41, the insertion portion 15
It is possible to reduce the diameter. Therefore, it is possible to reduce the diameter and realize the measurement of the small-diameter opening 3 as compared with the conventional case in which the plate-shaped lower moving tongue piece has to be arranged on the side surface of the head to be inserted into the opening 3. can do.
【００２９】さらに、前記ヘッドの先端側部に、前記下
動舌片を固定するための凹部を正確な位置に正確な深さ
で形成する必要も無く、加工が容易となる。これによ
り、製造コストの削減に寄与することができる。Further, it is not necessary to form a concave portion for fixing the lower moving tongue piece at an accurate position and an accurate depth on the tip side portion of the head, and the processing is facilitated. This can contribute to a reduction in manufacturing cost.
【００３０】また、前記筒状部材６２の噴出部６５から
の空気は、前記シャフト４１に設けられた大径の受圧部
５２に噴出されるため、小径のシャフト４１の基端面に
空気が噴出される場合と比較して、背圧による測定精度
を高めることができる。さらに、この大径の受圧部５２
を、付勢手段を構成するコイルスプリング６４の受け面
として有効利用を図ることができる。Further, since the air from the ejection portion 65 of the tubular member 62 is ejected to the large diameter pressure receiving portion 52 provided on the shaft 41, air is ejected to the base end surface of the small diameter shaft 41. The accuracy of measurement by back pressure can be improved as compared with the case of Further, this large-diameter pressure receiving portion 52
Can be effectively used as a receiving surface of the coil spring 64 that constitutes the urging means.
【００３１】[0031]
【発明の効果】以上説明したように本発明の請求項１の
内径測定具にあっては、測定対象の開口部に挿入される
挿入部内に、球状の接触子に接する縮径部分を有したシ
ャフトを移動自在に設けるだけで、内径測定具を構成す
ることができる。As described above, in the inner diameter measuring device according to the first aspect of the present invention, the reduced diameter portion in contact with the spherical contactor is provided in the insertion portion inserted into the opening to be measured. The inner diameter measuring tool can be constructed only by movably providing the shaft.
【００３２】このため、前記接触子及び前記シャフトの
小径化によって、前記挿入部の小径化が可能となる。し
たがって、開口部に挿入されるヘッドの側面に板状の下
動舌片を配設しなければならなかった従来と比較して、
小径化が可能となり、小径穴の測定を実現することがで
きる。Therefore, the diameter of the insertion portion can be reduced by reducing the diameters of the contactor and the shaft. Therefore, in comparison with the conventional case where the plate-shaped lower moving tongue piece had to be arranged on the side surface of the head inserted into the opening,
It is possible to reduce the diameter, and it is possible to measure small diameter holes.
【００３３】さらに、前記ヘッドの先端側部に、前記下
動舌片を固定するための凹部を正確な位置に正確な深さ
で形成する必要も無く、加工が容易となる。これによ
り、製造コストの削減に寄与することができる。Further, it is not necessary to form a concave portion for fixing the lower moving tongue piece at an accurate position and an accurate depth on the tip side portion of the head, and the processing is facilitated. This can contribute to a reduction in manufacturing cost.
【００３４】また、請求項２の内径測定具においては、
測定用の流体が通流する供給路を筒状部材で構成し、該
筒状部材の取付部にセンサを取り付け、このセンサで供
給される流体の背圧を測定することによって、測定対象
の開口部の内径を測定することができる。Further, in the inner diameter measuring tool of claim 2,
The supply passage through which the fluid for measurement flows is formed by a tubular member, a sensor is attached to the mounting portion of the tubular member, and the back pressure of the fluid supplied by this sensor is measured to open the measurement target opening. The inner diameter of the part can be measured.
【００３５】そして、筒状部材の噴出部からの流体を、
シャフトに設けられた大径の受圧部に噴出することがで
きるため、小径のシャフトの基端面に流体を噴出する場
合と比較して、背圧による測定精度を高めることができ
る。さらに、この大径の受圧部を、付勢手段を構成する
スプリングの受け面として有効利用することができる。Then, the fluid from the ejection portion of the tubular member is
Since the fluid can be ejected to the large-diameter pressure receiving portion provided on the shaft, it is possible to improve the measurement accuracy by the back pressure as compared with the case where the fluid is ejected to the base end surface of the small-diameter shaft. Further, this large-diameter pressure receiving portion can be effectively used as the receiving surface of the spring that constitutes the urging means.
【図１】本発明の一実施の形態を示す要部の断面図であ
る。FIG. 1 is a cross-sectional view of a main part showing an embodiment of the present invention.
【図２】同実施の形態の挿入部を示す要部の断面図であ
る。FIG. 2 is a sectional view of an essential part showing an insertion part of the same embodiment.
【図３】従来の内径測定具を示す図である。FIG. 3 is a view showing a conventional inner diameter measuring tool.
【図４】同従来例の要部を示す図で、（ａ）は図３のＡ
−Ａ断面図であり、（ｂ）は下動舌片を示す断面図であ
る。FIG. 4 is a diagram showing a main part of the conventional example, in which FIG.
FIG. 7B is a cross-sectional view taken along the line A of FIG.
１ 内径測定具 ２ 測定対象物 ３ 開口部 ３ａ 内周面 １５ 挿入部 ３２ 接触子 ４１ シャフト ４２ テーパ部 ５２ 受圧部 ６２ 筒状部材 ６４ コイルスプリング（付勢部材） ６５ 噴出部 ７１ 供給穴 ７３ 取付部 ７４ 差圧センサ 1 Inner diameter measuring tool 2 Object to be measured 3 openings 3a Inner surface 15 Insert 32 contacts 41 shaft 42 Tapered part 52 Pressure receiving part 62 tubular member 64 coil spring (biasing member) 65 Spout 71 Supply hole 73 Mounting part 74 Differential pressure sensor
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 2F062 AA34 CC25 CC26 EE04 EE07 EE63 FF03 FF25 GG17 GG81 GG83 HH13 HH21 MM01 2F066 AA23 DD12 DD14 FF09 HH13 ─────────────────────────────────────────────────── ─── Continued front page F term (reference) 2F062 AA34 CC25 CC26 EE04 EE07 EE63 FF03 FF25 GG17 GG81 GG83 HH13 HH21 MM01 2F066 AA23 DD12 DD14 FF09 HH13
Claims (2)
備えた内径測定具において、 前記挿入部から側方へ突出し、内側へ後退自在に設けら
れた球状の接触子と、 前記挿入部内にその長さ方向へ移動自在に収容され、前
記接触子に接する部位が先端へ向かうに従って縮径した
シャフトと、 該シャフトを先端方向へ付勢する付勢手段と、 前記挿入部より延出した前記シャフトの基端面に流体を
吹き付ける供給路と、 該供給路へ前記流体を供給する供給部と、 を備えたことを特徴とする内径測定具。1. An inner diameter measuring tool having an insertion portion to be inserted into an opening to be measured, wherein a spherical contactor that projects laterally from the insertion portion and is retractable inward is provided, and the inside of the insertion portion. A shaft that is movably accommodated in the longitudinal direction of the shaft, the diameter of which is reduced as the portion in contact with the contact element moves toward the distal end; An inner diameter measuring tool comprising: a supply path for spraying a fluid onto the base end surface of the shaft; and a supply section for supplying the fluid to the supply path.
部材の基端部に、前記流体を供給するとともに該流体の
背圧を測定するセンサの取付部を形成し、当該筒状部材
の先端部に前記流体を噴出する噴出部を設ける一方、 前記シャフトの基端部に、該シャフトより大径の受圧部
を設け、該受圧部と前記筒状部材間にスプリングを設け
て前記付勢手段を構成したことを特徴とする請求項１記
載の内径測定具。2. The supply passage is formed of a tubular member, and a mounting portion for a sensor that supplies the fluid and measures a back pressure of the fluid is formed at a base end portion of the tubular member. A jet portion for jetting the fluid is provided at the tip of the cylindrical member, while a pressure receiving portion having a diameter larger than that of the shaft is provided at the base end of the shaft, and a spring is provided between the pressure receiving portion and the tubular member. The inner diameter measuring tool according to claim 1, wherein the biasing means is configured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001285273A JP2003090718A (en) | 2001-09-19 | 2001-09-19 | Inner diameter measuring implement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001285273A JP2003090718A (en) | 2001-09-19 | 2001-09-19 | Inner diameter measuring implement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003090718A true JP2003090718A (en) | 2003-03-28 |
Family
ID=19108448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001285273A Withdrawn JP2003090718A (en) | 2001-09-19 | 2001-09-19 | Inner diameter measuring implement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003090718A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006284376A (en) * | 2005-03-31 | 2006-10-19 | Aisin Aw Co Ltd | Positioning device, air micro measuring device, and measuring method thereof |
| CN108981532A (en) * | 2018-08-20 | 2018-12-11 | 天津仲宇博金属制品有限公司 | A kind of cursor detection components of the big chain of rings |
| JP2021183916A (en) * | 2020-05-21 | 2021-12-02 | 株式会社ダイヤ精機製作所 | Measuring unit structure and measuring device using the same |
-
2001
- 2001-09-19 JP JP2001285273A patent/JP2003090718A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006284376A (en) * | 2005-03-31 | 2006-10-19 | Aisin Aw Co Ltd | Positioning device, air micro measuring device, and measuring method thereof |
| JP4713197B2 (en) * | 2005-03-31 | 2011-06-29 | アイシン・エィ・ダブリュ株式会社 | Positioning device and air micro measurement device |
| CN108981532A (en) * | 2018-08-20 | 2018-12-11 | 天津仲宇博金属制品有限公司 | A kind of cursor detection components of the big chain of rings |
| JP2021183916A (en) * | 2020-05-21 | 2021-12-02 | 株式会社ダイヤ精機製作所 | Measuring unit structure and measuring device using the same |
| JP7095905B2 (en) | 2020-05-21 | 2022-07-05 | 株式会社ダイヤ精機製作所 | Measuring unit structure and measuring device using it |
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Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20061006 |
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