WO2021186815A1 - Protection plug for transportation - Google Patents

Protection plug for transportation Download PDF

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Publication number
WO2021186815A1
WO2021186815A1 PCT/JP2020/046505 JP2020046505W WO2021186815A1 WO 2021186815 A1 WO2021186815 A1 WO 2021186815A1 JP 2020046505 W JP2020046505 W JP 2020046505W WO 2021186815 A1 WO2021186815 A1 WO 2021186815A1
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WO
WIPO (PCT)
Prior art keywords
cylinder
hole
groove
section
transportation
Prior art date
Application number
PCT/JP2020/046505
Other languages
French (fr)
Japanese (ja)
Inventor
竹徳 土屋
公志 前山
正一 近藤
英和 市川
Original Assignee
日立Astemo株式会社
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by 日立Astemo株式会社 filed Critical 日立Astemo株式会社
Priority to CN202080098611.8A priority Critical patent/CN115335612A/en
Priority to JP2022508060A priority patent/JP7442620B2/en
Publication of WO2021186815A1 publication Critical patent/WO2021186815A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/04—Arrangements of piping, valves in the piping, e.g. cut-off valves, couplings or air hoses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J13/00—Covers or similar closure members for pressure vessels in general
    • F16J13/02—Detachable closure members; Means for tightening closures
    • F16J13/10—Detachable closure members; Means for tightening closures attached by means of a divided ring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear

Definitions

  • the present invention relates to a transport protective plug, and more particularly to a transport protective plug used for an opening of a housing provided with a space for generating internal pressure.
  • a protective plug for transportation for example, in a pipe joint (housing)
  • a cylinder portion inserted into the opening of the pipe joint and a cylinder portion provided at one end of the cylinder portion are provided from the end face of the opening portion of the pipe joint.
  • Some have a finger hook that protrudes outward, and when transporting or storing the fitting, the cylinder is inserted into the opening of the fitting to prevent foreign matter from entering the inside of the fitting.
  • a protective plug for transportation could be easily removed from the pipe joint by using a finger hook (see, for example, Patent Document 1).
  • an object of the present invention is to provide a protective plug for transportation which is detachably provided in a through hole provided in a housing and is not likely to come off even if an internal pressure is generated in a space inside the housing.
  • the protective plug for transportation of the present invention is used in a product in which a through hole for communicating the inside and outside of the space is formed in a housing provided with a space in which an internal pressure is generated.
  • a transport protective plug that is detachably attached to a through hole and seals the space, a cylinder portion to be inserted into the through hole and one end of the cylinder portion are provided and are larger than the inner diameter of the through hole. It is characterized in that it is integrally provided with a flange portion formed having a large diameter, and a communication groove for communicating the inside and outside of the space portion is formed.
  • the communication groove is provided on the outer peripheral surface of the tubular portion, and is provided on the tubular portion side surface of the flange portion in succession with the first groove portion extending in the axial direction of the tubular portion. It is preferable to provide a second groove portion extending in a direction orthogonal to the first groove portion.
  • a large-diameter flange portion formed with a diameter larger than that of the flange portion continuously above the flange portion.
  • the housing is a cylinder portion of a vehicle braking device, and the through hole may be a union hole formed in the cylinder portion.
  • the transport protection plug of the present invention even if an internal pressure is generated in the space inside the housing, the internal pressure can be released to the outside by the communication groove, so that the transport protection plug may come out of the through hole. Therefore, it is possible to reliably prevent foreign matter from entering the space.
  • the communication groove is provided on the outer peripheral surface of the tubular portion, and is provided on the side surface of the tubular portion of the flange portion so as to be continuous with the first groove portion and the first groove portion extending in the axial direction of the tubular portion.
  • a finger can be hung between the flange portion and the large-diameter flange portion.
  • the protective plug for transportation can be easily attached and detached.
  • the transport protective plug can be formed at low cost, and more preferably, by forming the transport protective plug with a resin having elasticity, the transport protective plug has an appropriate elasticity. It can be made to improve workability.
  • the housing is the cylinder portion of the vehicle brake device and the through hole is a union hole formed in the cylinder portion, internal pressure is generated in the cylinder portion in the transportation process and the assembly process of the brake device.
  • the transport protection plug will come off, and it is possible to reliably prevent foreign matter from entering the cylinder portion.
  • FIG. 2 is a cross-sectional view taken along the line III-III of FIG. It is a perspective view of the protection plug for transportation which shows one embodiment of this invention.
  • FIG. 6 is a sectional view taken along line VV of FIG. It is a front view of the drum brake for a vehicle which assembled the foil cylinder by using the transport protection plug which shows one embodiment of this invention.
  • FIGS. 1 to 6 are diagrams showing an example of a form in which the transport protection plug of the present invention is applied to a wheel cylinder (cylinder portion) of a vehicle drum brake (vehicle brake device).
  • a pair of brake shoes 3 and 3 disposed inside a back plate 2 fixed to a vehicle body are expanded by a hydraulic operation of a foil cylinder 4 with an anchor 5 as a fulcrum.
  • the brake shoes 3 and 3 are fixed to the bow-shaped webs 3a and 3a arranged in parallel with the back plate 2 and the outer peripheral surfaces of the webs 3a and 3a, and the rims 3b and 3b orthogonal to the webs 3a and 3a.
  • the linings 3c and 3c attached to the outer peripheral surfaces of the rims 3b and 3b, one end of the webs 3a and 3a is supported by the pistons 6 and 6 of the wheel cylinder 4, and the other end is the anchor 5. It is supported.
  • the brake shoe 3 is urged in the diameter reduction direction by the return springs 7a and 7b stretched between the webs 3a and 3a, and during braking, the anchor 5 is pushed by the pistons 6 and 6 of the wheel cylinder 4. Is used as a fulcrum to expand outward, and the linings 3c and 3c on the outer surface are brought into sliding contact with the inner peripheral surface of the brake drum.
  • An automatic braking gap adjusting device 8 is arranged near the inside of the return spring 7a arranged on the wheel cylinder 4 side, and the linings 3c and 3c of the brake shoes 3 and 3 are worn and the inner circumference of the brake drum is worn.
  • the braking gap automatic adjusting device 8 regulates the retracted position of the widened brake shoes 3 and 3 to the outer peripheral side of the back plate, thereby performing predetermined braking.
  • the gap is compensated.
  • a parking lever 9a for a parking brake that expands and operates both brake shoes 3 and 3 is pivotally supported by a support shaft 9b, so that the braking action can also be performed by operating the parking brake. It has become.
  • the wheel cylinder 4 is a double-ended cylinder in which a cylinder hole 4b (space portion) is formed through a cylinder body 4a (housing) bolted to a back plate 2 and the pistons 6 and 6 are housed in the cylinder hole 4b.
  • the pistons 6 and 6 are urged in a direction away from each other by the elastic force of the piston spring 11 contracted in the hydraulic chamber 10 in the intermediate portion.
  • Each piston 6 includes a main body portion 6a that is slidably inserted into the cylinder hole 4b, and a small-diameter shaft portion 6b that is continuous with the outer end surface of the main body portion 6a and projects from the end surface of the cylinder body 4a. There is.
  • a piston seal groove 6c is provided around the outer peripheral surface of the main body 6a of each piston 6 on the inner side of the cylinder hole, and the piston seal 12 is fitted in the piston seal groove 6c.
  • the hydraulic chamber 10 is formed. In the hydraulic chamber 10, a union hole 13 for introducing the hydraulic fluid is opened, and the piston spring 11 is arranged.
  • a boot groove 6d is provided around the outer peripheral surface on the base end side, and a piston is formed in the boot groove 6d and the cylinder body side boot groove 4c provided around the tip end side of the cylinder body 4a. Both ends of the boot 14 are attached. Further, a brake shoe mounting groove 6e that is parallel to the back plate 2 and opens to the outer end surface is formed at the outer end portion of the small diameter shaft portion 6b.
  • a mounting portion 4d that protrudes toward the back plate side and is bolted to the back plate 2, a union boss portion 4e having a union hole 13 inside, and a bleeder screw.
  • a bleeder boss portion (not shown) to which the 15 is attached is formed.
  • the union hole 13 has a female screw hole 13a (through hole) for screwing a male screw portion (not shown) of the union bolt and a small diameter hole 13b that opens into the hydraulic chamber 10, and is screwed into the female screw hole 13a.
  • the hydraulic pressure pipe is connected to the union hole 13 via the union bolt, and the hydraulic pressure is supplied from the hydraulic pressure pipe to the hydraulic pressure chamber 10.
  • the wheel cylinder 4 When assembling such a vehicle drum brake 1, the wheel cylinder 4 is previously assembled with the piston 6 and the piston spring 11 in which the piston seal 12 is fitted in the cylinder body 4a, and the piston boot 14 is attached. With the bleeder screw 15 attached to the bleeder boss portion, the bleeder screw 15 is stored in the transport pallet 16 and transferred to the assembly site of the vehicle drum brake 1 and assembled inside the back plate 2. As shown in FIG. 1, the foil cylinder 4 during transportation is provided with a protective plug 17 for transportation attached to the female screw hole 13a of the union hole 13 to seal the inside of the cylinder hole 4b, and foreign matter is contained in the cylinder hole 4b from the outside. Prevents intrusion.
  • the transport protective plug 17 is formed of a resin, preferably a resin having elasticity, for example, polyvinyl chloride, vinyl acetate, or the like, and has a tubular portion 17a formed having a diameter slightly smaller than the inner diameter of the female screw hole 13a. , A flange portion 17b provided on the upper portion of the tubular portion 17a and formed to have a diameter larger than the inner diameter of the female screw hole 13a, and a flange portion 17b continuously provided on the upper portion of the flange portion 17b and having a diameter larger than that of the flange portion 17b.
  • a resin having elasticity for example, polyvinyl chloride, vinyl acetate, or the like
  • a large-diameter flange portion 17c to be formed is integrally provided, and a communication groove 18 is formed from the tubular portion 17a to the flange portion 17b.
  • the communication groove 18 is provided on the outer peripheral surface of the cylinder portion 17a, and is provided on the side surface of the cylinder portion of the flange portion 17b continuously with the first groove portion 18a extending in the axial direction of the cylinder portion 17a and the first groove portion 18a. It has a second groove portion 18b extending in a direction orthogonal to the first groove portion 18a, and when the transport protection plug 17 is attached to the female screw hole 13a, the inside of the cylinder hole 4b and the outside air pass through the communication groove 18. Communicate.
  • both pistons 6 and 6 are stored in the transport pallet 16 in a state of being pushed into the cylinder hole against the elastic force of the piston spring 11 in order to suppress rattling. ..
  • both pistons 6 and 6 are pushed into the cylinder hole, so that internal pressure is applied to the hydraulic chamber 10, but the communication groove 18
  • the internal pressure can be released to the outside air, the transport protective plug 17 does not come out of the female screw hole 13a, and foreign matter can be reliably prevented from entering the cylinder hole 4b during transportation.
  • the pistons 6 and 6 move in the directions away from each other due to the elastic force of the piston spring 11, and the tips of the pistons 6 and 6 are crimped to the transportation pallet 16.
  • the foil cylinder 4 can be fixed at the same time to prevent the foil cylinder 4 from rattling during transportation.
  • the transport protection plug 17 By forming the transport protection plug 17 in this way, the inside of the cylinder hole 4b can be reliably sealed during transportation and assembly of the foil cylinder 4, and foreign matter can be prevented from entering.
  • the communication groove 18 is provided on the outer peripheral surface of the tubular portion 17a, and is provided on the tubular portion side surface of the flange portion 17b continuously with the first groove portion 18a extending in the axial direction of the tubular portion 17a and the first groove portion 18a.
  • the length of the communication groove 18 can be shortened by forming the second groove portion 18b extending in the direction orthogonal to the first groove portion.
  • the transport protective plug 17 can be formed at low cost, and more preferably, by forming the transport protective plug 17 with an elastic resin, the transport protective plug 17 is suitable. It can be made elastic and workability is improved.
  • the transport protection plug of the present invention is not limited to the one used for the through hole formed in the cylinder portion of the brake device as in the above-described embodiment, but is a housing provided with a space portion inside in which internal pressure is generated. It can be widely applied to the through holes formed in. Further, the transport protective plug of the present invention does not have to have a large-diameter flange portion continuously above the flange portion, and the shape of the communication hole is such that the internal space portion and the outside air can be communicated with each other. Is optional.
  • Hydraulic chamber 11 ... Piston spring, 12 ... Piston seal, 13 ... Union hole, 13a ... Female screw hole , 13b ... Small diameter hole, 14 ... Piston boot, 15 ... Breeder brake, 16 ... Transport pallet, 17 ... Transport protection plug, 17a ... Cylinder part, 17b ... Flange part, 17c ... Large diameter flange part, 18 ... Communication groove , 18a ... 1st groove, 18b ... 2nd groove

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Braking Arrangements (AREA)
  • Handcart (AREA)

Abstract

Provided is a protection plug for transportation which is provided attachably/detachably in a through-hole provided in a case and will not be unplugged due to internal pressure generated in a space section inside the case. A protection plug 17 for transportation is mounted in a female threaded hole 13a of a union hole 13 provided in a wheel cylinder 4 (case). The protection plug 17 for transportation integrally comprises: a cylinder section 17a formed slightly smaller in diameter than the inner diameter of the female threaded hole 13a; a flange section 17b that is provided on the upper portion of the cylinder section 17a and is formed larger in diameter than the inner diameter of the female threaded hole 13a; and a large flange section 17c that is provided so as to be continuous with the upper portion of the flange section 17b and is formed larger in diameter than the flange section 17b. The protection plug has a communication groove 18 extending from the cylinder section 17a to the flange section 17b. The communication groove 18 has: a first groove section 18a that is provided in the outer circumferential surface of the cylinder section 17a and extends in the axial direction of the cylinder section 17a; and a second groove section 18b that is provided in the cylinder section-side surface of the flange section 17b so as to be continuous with the first groove section 18a and extends in a direction perpendicular to the first groove section 18a.

Description

輸送用保護プラグTransport protection plug
　本発明は、輸送用保護プラグに関し、詳しくは、内圧が発生する空間部を内部に備えた筐体の開口部に用いられる輸送用保護プラグに関する。 The present invention relates to a transport protective plug, and more particularly to a transport protective plug used for an opening of a housing provided with a space for generating internal pressure.
　従来、輸送用保護プラグとして、例えば、管継手（筐体）に用いられるものでは、管継手の開口部に挿入される筒部と、筒部の一端に設けられ、管継手の開口部端面よりも外方に突出する指掛け部とを備えたものがあり、管継手の輸送時や保管時には、筒部を管継手の開口部に挿入して、管継手の内部に異物が侵入することを防止し、管継手を施工する際には、指掛け部を利用して、輸送用保護プラグを管継手から容易に取り外せるようにしたものがあった（例えば、特許文献１参照。）。 Conventionally, as a protective plug for transportation, for example, in a pipe joint (housing), a cylinder portion inserted into the opening of the pipe joint and a cylinder portion provided at one end of the cylinder portion are provided from the end face of the opening portion of the pipe joint. Some have a finger hook that protrudes outward, and when transporting or storing the fitting, the cylinder is inserted into the opening of the fitting to prevent foreign matter from entering the inside of the fitting. However, when constructing a pipe joint, there was a case where a protective plug for transportation could be easily removed from the pipe joint by using a finger hook (see, for example, Patent Document 1).
実開平５－８９２６３号公報Jikkenhei 5-89263 Gazette
　しかし、内部の空間部に内圧が発生する筐体の通孔に、上述の特許文献１のような輸送用保護プラグを用いると、内圧発生時に輸送用保護プラグが筐体から抜ける虞があった。 However, if a transport protection plug as in Patent Document 1 described above is used for the through hole of the housing in which internal pressure is generated in the internal space, there is a risk that the transport protection plug will come off from the housing when internal pressure is generated. ..
　そこで本発明は、筐体に設けた通孔に着脱可能に設けられ、筐体内部の空間部に内圧が発生しても抜ける虞のない輸送用保護プラグを提供することを目的としている。 Therefore, an object of the present invention is to provide a protective plug for transportation which is detachably provided in a through hole provided in a housing and is not likely to come off even if an internal pressure is generated in a space inside the housing.
　上記目的を達成するため、本発明の輸送用保護プラグは、内圧が発生する空間部を内部に備えた筐体に、前記空間部の内外を連通させる通孔を形成した製品に用いられ、前記通孔に着脱可能に装着され、前記空間部を封止する輸送用保護プラグにおいて、前記通孔に挿入される筒部と、該筒部の一端部に設けられ、前記通孔の内径よりも大径に形成されるフランジ部とを一体に備えるとともに、前記空間部の内外を連通させる連通溝を形成したことを特徴としている。 In order to achieve the above object, the protective plug for transportation of the present invention is used in a product in which a through hole for communicating the inside and outside of the space is formed in a housing provided with a space in which an internal pressure is generated. In a transport protective plug that is detachably attached to a through hole and seals the space, a cylinder portion to be inserted into the through hole and one end of the cylinder portion are provided and are larger than the inner diameter of the through hole. It is characterized in that it is integrally provided with a flange portion formed having a large diameter, and a communication groove for communicating the inside and outside of the space portion is formed.
　また、前記連通溝は、前記筒部の外周面に設けられ、該筒部の軸線方向に延出する第１溝部と、該第１溝部に連続して前記フランジ部の筒部側面に設けられ、該第１溝部に対して直交方向に延出する第２溝部とを備えていると好ましい。 Further, the communication groove is provided on the outer peripheral surface of the tubular portion, and is provided on the tubular portion side surface of the flange portion in succession with the first groove portion extending in the axial direction of the tubular portion. It is preferable to provide a second groove portion extending in a direction orthogonal to the first groove portion.
　さらに、前記フランジ部の上部に連続して、該フランジ部よりも大径に形成される大径フランジ部を設けると好適である。 Further, it is preferable to provide a large-diameter flange portion formed with a diameter larger than that of the flange portion continuously above the flange portion.
　また、輸送用保護プラグを樹脂で形成すると好ましい。 It is also preferable to form the protective plug for transportation with resin.
　さらに前記筐体は、車両用ブレーキ装置のシリンダ部であり、前記通孔は、前記シリンダ部に形成されるユニオン孔であってもよい。 Further, the housing is a cylinder portion of a vehicle braking device, and the through hole may be a union hole formed in the cylinder portion.
　本発明の輸送用保護プラグによれば、筐体の内部の空間部に内圧が発生しても、連通溝により内圧を外部に逃がすことができることから、輸送用保護プラグが通孔から抜ける虞がなく、空間部に異物が侵入することを確実に防止することができる。 According to the transport protection plug of the present invention, even if an internal pressure is generated in the space inside the housing, the internal pressure can be released to the outside by the communication groove, so that the transport protection plug may come out of the through hole. Therefore, it is possible to reliably prevent foreign matter from entering the space.
　また、連通溝は、筒部の外周面に設けられ、該筒部の軸線方向に延出する第１溝部と、第１溝部に連続してフランジ部の筒部側面に設けられ、第１溝部に対して直交方向に延出する第２溝部とで形成したことにより、連通溝の長さを短くすることができる。 Further, the communication groove is provided on the outer peripheral surface of the tubular portion, and is provided on the side surface of the tubular portion of the flange portion so as to be continuous with the first groove portion and the first groove portion extending in the axial direction of the tubular portion. By forming the second groove portion extending in the direction orthogonal to the above, the length of the communication groove can be shortened.
　さらに、フランジ部の上部に連続して、該フランジ部よりも大径に形成される大径フランジ部を設けたことにより、フランジ部と大径フランジ部との間に指を掛けることができ、輸送用保護プラグの着脱を容易に行うことができる。 Further, by providing a large-diameter flange portion formed continuously on the upper portion of the flange portion and having a diameter larger than that of the flange portion, a finger can be hung between the flange portion and the large-diameter flange portion. The protective plug for transportation can be easily attached and detached.
　また、輸送用保護プラグを樹脂で形成することにより、輸送用保護プラグを安価に形成することができ、より好ましくは弾性を有する樹脂で形成することにより、輸送用保護プラグに適度な弾性を持たせることができ、作業性が向上する。 Further, by forming the transport protective plug with a resin, the transport protective plug can be formed at low cost, and more preferably, by forming the transport protective plug with a resin having elasticity, the transport protective plug has an appropriate elasticity. It can be made to improve workability.
　さらに、筐体は、車両用ブレーキ装置のシリンダ部であり、通孔は、シリンダ部に形成されるユニオン孔であることにより、ブレーキ装置の輸送工程や組み付け工程でシリンダ部内に内圧が発生しても輸送用保護プラグが抜ける虞がなく、シリンダ部内に異物が侵入することを確実に防止することができる。 Further, since the housing is the cylinder portion of the vehicle brake device and the through hole is a union hole formed in the cylinder portion, internal pressure is generated in the cylinder portion in the transportation process and the assembly process of the brake device. However, there is no risk that the transport protection plug will come off, and it is possible to reliably prevent foreign matter from entering the cylinder portion.
本発明の一形態例を示す輸送用保護プラグを用いて、車両用ドラムブレーキのホイルシリンダを輸送する際の説明図である。It is explanatory drawing at the time of transporting the foil cylinder of the drum brake for a vehicle using the transport protection plug which shows one embodiment of this invention. 本発明の一形態例を示す輸送用保護プラグの正面図である。It is a front view of the transport protection plug which shows one embodiment of this invention. 図２のＩＩＩ－ＩＩＩ断面図である。FIG. 2 is a cross-sectional view taken along the line III-III of FIG. 本発明の一形態例を示す輸送用保護プラグの斜視図である。It is a perspective view of the protection plug for transportation which shows one embodiment of this invention. 図６のＶ－Ｖ断面図である。FIG. 6 is a sectional view taken along line VV of FIG. 本発明の一形態例を示す輸送用保護プラグを用いて、ホイルシリンダを組み付けた車両用ドラムブレーキの正面図である。It is a front view of the drum brake for a vehicle which assembled the foil cylinder by using the transport protection plug which shows one embodiment of this invention.
　図１乃至図６は、本発明の輸送用保護プラグを車両用ドラムブレーキ（車両用ブレーキ装置）のホイルシリンダ（シリンダ部）に適用した一形態例を示す図である。 1 to 6 are diagrams showing an example of a form in which the transport protection plug of the present invention is applied to a wheel cylinder (cylinder portion) of a vehicle drum brake (vehicle brake device).
　車両用ドラムブレーキ１は、車体に固設されるバックプレート２の内部に配設される一対のブレーキシュー３，３を、ホイルシリンダ４の液圧操作によってアンカー５を支点に拡開するようにしている。ブレーキシュー３，３は、バックプレート２と平行に配設される弓型のウェブ３ａ，３ａと、該ウェブ３ａ，３ａの外周面に固設され、ウェブ３ａ，３ａに直交するリム３ｂ，３ｂと、該リム３ｂ，３ｂの外周面に貼着されるライニング３ｃ，３ｃとからなり、ウェブ３ａ，３ａの一端部がホイルシリンダ４のピストン６，６に支持され、他端部がアンカー５に支持されている。ブレーキシュー３は、ウェブ３ａ，３ａ間に張設されるリターンスプリング７ａ，７ｂによって、縮径方向に付勢されており、制動時には、ホイルシリンダ４のピストン６，６の押動によって、アンカー５を支点に外側へ拡開し、外面のライニング３ｃ，３ｃをブレーキドラムの内周面に摺接させる。 In the vehicle drum brake 1, a pair of brake shoes 3 and 3 disposed inside a back plate 2 fixed to a vehicle body are expanded by a hydraulic operation of a foil cylinder 4 with an anchor 5 as a fulcrum. ing. The brake shoes 3 and 3 are fixed to the bow- shaped webs 3a and 3a arranged in parallel with the back plate 2 and the outer peripheral surfaces of the webs 3a and 3a, and the rims 3b and 3b orthogonal to the webs 3a and 3a. And the linings 3c and 3c attached to the outer peripheral surfaces of the rims 3b and 3b, one end of the webs 3a and 3a is supported by the pistons 6 and 6 of the wheel cylinder 4, and the other end is the anchor 5. It is supported. The brake shoe 3 is urged in the diameter reduction direction by the return springs 7a and 7b stretched between the webs 3a and 3a, and during braking, the anchor 5 is pushed by the pistons 6 and 6 of the wheel cylinder 4. Is used as a fulcrum to expand outward, and the linings 3c and 3c on the outer surface are brought into sliding contact with the inner peripheral surface of the brake drum.
　ホイルシリンダ４側に配置されるリターンスプリング７ａの内側近傍には、制動間隙自動調整装置８が配設されていて、ブレーキシュー３，３のライニング３ｃ，３ｃが摩耗して、ブレーキドラムの内周面との間に制動間隙が設定以上に広がった場合に、この制動間隙自動調整装置８によって、拡開したブレーキシュー３，３の後退位置をバックプレート外周側に規制することにより、所定の制動間隙が補償されるようになっている。また、一方のブレーキシュー３には、両ブレーキシュー３，３を拡開操作するパーキングブレーキ用のパーキングレバー９ａが支軸９ｂによって枢支されており、パーキングブレーキ操作によっても、制動作用が行えるようになっている。 An automatic braking gap adjusting device 8 is arranged near the inside of the return spring 7a arranged on the wheel cylinder 4 side, and the linings 3c and 3c of the brake shoes 3 and 3 are worn and the inner circumference of the brake drum is worn. When the braking gap between the surface and the surface is wider than the set value, the braking gap automatic adjusting device 8 regulates the retracted position of the widened brake shoes 3 and 3 to the outer peripheral side of the back plate, thereby performing predetermined braking. The gap is compensated. Further, on one of the brake shoes 3, a parking lever 9a for a parking brake that expands and operates both brake shoes 3 and 3 is pivotally supported by a support shaft 9b, so that the braking action can also be performed by operating the parking brake. It has become.
　ホイルシリンダ４は、バックプレート２にボルト止めされるシリンダボディ４ａ（筐体）に、シリンダ孔４ｂ（空間部）を貫通形成し、該シリンダ孔４ｂに前記ピストン６，６を収容した両口シリンダで、前記ピストン６，６は、中間部の液圧室１０に縮設されたピストンスプリング１１の弾発力によって、互いに離反する方向へ付勢されている。 The wheel cylinder 4 is a double-ended cylinder in which a cylinder hole 4b (space portion) is formed through a cylinder body 4a (housing) bolted to a back plate 2 and the pistons 6 and 6 are housed in the cylinder hole 4b. The pistons 6 and 6 are urged in a direction away from each other by the elastic force of the piston spring 11 contracted in the hydraulic chamber 10 in the intermediate portion.
　各ピストン６は、シリンダ孔４ｂ内に摺動可能に内挿される本体部６ａと、該本体部６ａの外端面に連続して、シリンダボディ４ａの端面から突出する小径軸部６ｂとを備えている。各ピストン６の本体部６ａのシリンダ孔内部側の外周面には、ピストンシール溝６ｃが周設され、該ピストンシール溝６ｃにピストンシール１２が嵌着され、双方のピストンシール１２の間に前記液圧室１０が形成される。液圧室１０には、作動液を導入するユニオン孔１３が開口するとともに、前記ピストンスプリング１１が配置されている。 Each piston 6 includes a main body portion 6a that is slidably inserted into the cylinder hole 4b, and a small-diameter shaft portion 6b that is continuous with the outer end surface of the main body portion 6a and projects from the end surface of the cylinder body 4a. There is. A piston seal groove 6c is provided around the outer peripheral surface of the main body 6a of each piston 6 on the inner side of the cylinder hole, and the piston seal 12 is fitted in the piston seal groove 6c. The hydraulic chamber 10 is formed. In the hydraulic chamber 10, a union hole 13 for introducing the hydraulic fluid is opened, and the piston spring 11 is arranged.
　また、小径軸部６ｂは、基端側の外周面にブーツ溝６ｄが周設され、該ブーツ溝６ｄと、シリンダボディ４ａの先端側に周設されたシリンダボディ側ブーツ溝４ｃとに、ピストンブーツ１４の両端がそれぞれ装着される。さらに、小径軸部６ｂの外端部には、前記バックプレート２と平行で、外端面に開口するブレーキシュー装着溝６ｅが形成されている。 Further, in the small diameter shaft portion 6b, a boot groove 6d is provided around the outer peripheral surface on the base end side, and a piston is formed in the boot groove 6d and the cylinder body side boot groove 4c provided around the tip end side of the cylinder body 4a. Both ends of the boot 14 are attached. Further, a brake shoe mounting groove 6e that is parallel to the back plate 2 and opens to the outer end surface is formed at the outer end portion of the small diameter shaft portion 6b.
　シリンダボディ４ａのバックプレート側には、バックプレート側に突出するとともに、バックプレート２に当接してボルト止めされる取付部４ｄと、内部にユニオン孔１３を備えたユニオンボス部４ｅと、ブリーダスクリュ１５を取り付けるブリーダボス部（図示せず）とが形成されている。ユニオン孔１３は、ユニオンボルトの雄ねじ部（図示せず）を螺着する雌ねじ孔１３ａ（通孔）と、液圧室１０に開口する小径孔１３ｂとを有し、雌ねじ孔１３ａに螺着したユニオンボルトを介して液圧配管がユニオン孔１３に連結され、液圧配管から液圧室１０に液圧が供給される。 On the back plate side of the cylinder body 4a, a mounting portion 4d that protrudes toward the back plate side and is bolted to the back plate 2, a union boss portion 4e having a union hole 13 inside, and a bleeder screw. A bleeder boss portion (not shown) to which the 15 is attached is formed. The union hole 13 has a female screw hole 13a (through hole) for screwing a male screw portion (not shown) of the union bolt and a small diameter hole 13b that opens into the hydraulic chamber 10, and is screwed into the female screw hole 13a. The hydraulic pressure pipe is connected to the union hole 13 via the union bolt, and the hydraulic pressure is supplied from the hydraulic pressure pipe to the hydraulic pressure chamber 10.
　このような車両用ドラムブレーキ１を組み付ける際に、ホイルシリンダ４は、予め、シリンダボディ４ａ内に、ピストンシール１２を嵌着した状態のピストン６やピストンスプリング１１を組み付け、ピストンブーツ１４を取り付けるとともに、ブリーダボス部にブリーダスクリュ１５を取り付けた状態で、輸送用パレット１６に収納され、車両用ドラムブレーキ１の組み付け現場に移送され、バックプレート２の内部に組み付けられる。輸送時のホイルシリンダ４は、図１に示されるように、ユニオン孔１３の雌ねじ孔１３ａに輸送用保護プラグ１７を装着してシリンダ孔４ｂ内を封止し、外部からシリンダ孔４ｂ内に異物が侵入すること防止する。 When assembling such a vehicle drum brake 1, the wheel cylinder 4 is previously assembled with the piston 6 and the piston spring 11 in which the piston seal 12 is fitted in the cylinder body 4a, and the piston boot 14 is attached. With the bleeder screw 15 attached to the bleeder boss portion, the bleeder screw 15 is stored in the transport pallet 16 and transferred to the assembly site of the vehicle drum brake 1 and assembled inside the back plate 2. As shown in FIG. 1, the foil cylinder 4 during transportation is provided with a protective plug 17 for transportation attached to the female screw hole 13a of the union hole 13 to seal the inside of the cylinder hole 4b, and foreign matter is contained in the cylinder hole 4b from the outside. Prevents intrusion.
　輸送用保護プラグ１７は、樹脂、好ましくは弾性を有する樹脂、例えば、ポリ塩化ビニルや酢酸ビニル等で形成されるもので、雌ねじ孔１３ａの内径よりも僅かに小径に形成された筒部１７ａと、該筒部１７ａの上部に設けられ、雌ねじ孔１３ａの内径よりも大径に形成されたフランジ部１７ｂと、該フランジ部１７ｂの上部に連続して設けられ、フランジ部１７ｂよりも大径に形成される大径フランジ部１７ｃとを一体に備え、筒部１７ａからフランジ部１７ｂに亘って、連通溝１８が形成されている。連通溝１８は、筒部１７ａの外周面に設けられ、筒部１７ａの軸線方向に延出する第１溝部１８ａと、第１溝部１８ａに連続してフランジ部１７ｂの筒部側面に設けられ、第１溝部１８ａに対して直交方向に延出する第２溝部１８ｂとを有し、輸送用保護プラグ１７を雌ねじ孔１３ａに装着した際に、連通溝１８を介してシリンダ孔４ｂ内と外気とが連通する。 The transport protective plug 17 is formed of a resin, preferably a resin having elasticity, for example, polyvinyl chloride, vinyl acetate, or the like, and has a tubular portion 17a formed having a diameter slightly smaller than the inner diameter of the female screw hole 13a. , A flange portion 17b provided on the upper portion of the tubular portion 17a and formed to have a diameter larger than the inner diameter of the female screw hole 13a, and a flange portion 17b continuously provided on the upper portion of the flange portion 17b and having a diameter larger than that of the flange portion 17b. A large-diameter flange portion 17c to be formed is integrally provided, and a communication groove 18 is formed from the tubular portion 17a to the flange portion 17b. The communication groove 18 is provided on the outer peripheral surface of the cylinder portion 17a, and is provided on the side surface of the cylinder portion of the flange portion 17b continuously with the first groove portion 18a extending in the axial direction of the cylinder portion 17a and the first groove portion 18a. It has a second groove portion 18b extending in a direction orthogonal to the first groove portion 18a, and when the transport protection plug 17 is attached to the female screw hole 13a, the inside of the cylinder hole 4b and the outside air pass through the communication groove 18. Communicate.
　ホイルシリンダ４の輸送時には、ガタ付きを抑制するために、双方のピストン６，６をピストンスプリング１１の弾発力に抗して、シリンダ孔内部に押し込んだ状態で輸送用パレット１６に収納される。この時、ユニオン孔１３の雌ねじ孔１３ａに輸送用保護プラグ１７を装着した状態で、双方のピストン６，６をシリンダ孔内部に押し込むことから、液圧室１０に内圧が掛かるが、連通溝１８を介して内圧を外気に逃がすことができ、輸送用保護プラグ１７が雌ねじ孔１３ａから抜ける虞がなく、輸送時にシリンダ孔４ｂ内に異物が侵入することを確実に防止することができる。また、ホイルシリンダ４を輸送用パレット１６に収納すると、ピストン６，６がピストンスプリング１１の弾発力により離反する方向にそれぞれ移動し、ピストン６，６の先端が輸送用パレット１６に圧着することでホイルシリンダ４を固定し、輸送時にホイルシリンダ４がガタつくことを抑制できる。 When the foil cylinder 4 is transported, both pistons 6 and 6 are stored in the transport pallet 16 in a state of being pushed into the cylinder hole against the elastic force of the piston spring 11 in order to suppress rattling. .. At this time, with the transport protection plug 17 attached to the female screw hole 13a of the union hole 13, both pistons 6 and 6 are pushed into the cylinder hole, so that internal pressure is applied to the hydraulic chamber 10, but the communication groove 18 The internal pressure can be released to the outside air, the transport protective plug 17 does not come out of the female screw hole 13a, and foreign matter can be reliably prevented from entering the cylinder hole 4b during transportation. Further, when the foil cylinder 4 is stored in the transportation pallet 16, the pistons 6 and 6 move in the directions away from each other due to the elastic force of the piston spring 11, and the tips of the pistons 6 and 6 are crimped to the transportation pallet 16. The foil cylinder 4 can be fixed at the same time to prevent the foil cylinder 4 from rattling during transportation.
　一方、車両用ドラムブレーキ１の組み付け現場に輸送されたホイルシリンダ４をバックプレート２の内部に組み付ける際には、輸送用パレット１６からホイルシリンダ４を取り外すと、ピストン６，６がピストンスプリング１１の弾発力により離反する方向にそれぞれ移動するが、この時、液圧室１０には、輸送用保護プラグ１７の連通溝１８を介して外気が導入される。 On the other hand, when assembling the wheel cylinder 4 transported to the assembly site of the vehicle drum brake 1 inside the back plate 2, when the wheel cylinder 4 is removed from the transportation pallet 16, the pistons 6 and 6 become the piston spring 11. Each moves in the direction of separation due to the elastic force, and at this time, outside air is introduced into the hydraulic chamber 10 through the communication groove 18 of the transport protection plug 17.
　さらに、ホイルシリンダ４をバックプレート２に組み付ける際には、図５に示されるように、ピストン６，６のブレーキシュー装着溝６ｅ，６ｅにブレーキシュー３，３のウェブ３ａ，３ａの一端部が支持されるが、この時、ブレーキシュー３は、ウェブ３ａ，３ａ間に張設されるリターンスプリング７ａ，７ｂによって、縮径方向に付勢され、両ピストン６，６は、ピストンスプリング１１の弾発力に抗して、シリンダ孔４ｂ内に押し込まれた状態となる。ピストン６，６がシリンダ孔４ｂ内に押し込まれた状態となると液圧室１０に内圧が発生するが、輸送用保護プラグ１７の連通溝１８を介して内圧を外部に逃がすことができ、輸送用保護プラグ１７が雌ねじ孔１３ａから抜ける虞がなく、組み付け現場でシリンダ孔４ｂ内に異物が侵入することを確実に防止できる。また、このように、ホイルシリンダ４をバックプレート２に組み付けた後、輸送用保護プラグ１７を雌ねじ孔１３ａから取り外し、ユニオンボルトを取り付ける。 Further, when the wheel cylinder 4 is assembled to the back plate 2, as shown in FIG. 5, one end of the webs 3a and 3a of the brake shoes 3 and 3 is provided in the brake shoe mounting grooves 6e and 6e of the pistons 6 and 6. At this time, the brake shoe 3 is urged in the radial direction by the return springs 7a and 7b stretched between the webs 3a and 3a, and both pistons 6 and 6 are bullets of the piston spring 11. It is in a state of being pushed into the cylinder hole 4b against the force. When the pistons 6 and 6 are pushed into the cylinder hole 4b, an internal pressure is generated in the hydraulic chamber 10, but the internal pressure can be released to the outside through the communication groove 18 of the transport protection plug 17, and is used for transportation. There is no possibility that the protective plug 17 will come out of the female screw hole 13a, and it is possible to reliably prevent foreign matter from entering the cylinder hole 4b at the assembly site. Further, after assembling the foil cylinder 4 to the back plate 2 in this way, the transport protective plug 17 is removed from the female screw hole 13a, and the union bolt is attached.
　輸送用保護プラグ１７は、このように形成されることにより、ホイルシリンダ４の輸送時や組み付け時にシリンダ孔４ｂ内を確実に封止することができ、異物が侵入することを防止できる。また、連通溝１８は、筒部１７ａの外周面に設けられ、筒部１７ａの軸線方向に延出する第１溝部１８ａと、第１溝部１８ａに連続してフランジ部１７ｂの筒部側面に設けられ、第１溝部に対して直交方向に延出する第２溝部１８ｂとで形成されることにより、連通溝１８の長さを短くすることができる。さらに、フランジ部１７ｂの上部に連続して大径フランジ部１７ｃを設けたことにより、フランジ部１７ｂと大径フランジ部１７ｃの間に指を掛けることができ、輸送用保護プラグ１７の着脱を容易に行うことができる。また、輸送用保護プラグ１７を樹脂で形成したことにより、輸送用保護プラグ１７を安価に形成することができ、より好ましくは弾性を有する樹脂で形成することにより、輸送用保護プラグ１７に適度な弾性を持たせることができ、作業性が向上する。 By forming the transport protection plug 17 in this way, the inside of the cylinder hole 4b can be reliably sealed during transportation and assembly of the foil cylinder 4, and foreign matter can be prevented from entering. Further, the communication groove 18 is provided on the outer peripheral surface of the tubular portion 17a, and is provided on the tubular portion side surface of the flange portion 17b continuously with the first groove portion 18a extending in the axial direction of the tubular portion 17a and the first groove portion 18a. The length of the communication groove 18 can be shortened by forming the second groove portion 18b extending in the direction orthogonal to the first groove portion. Further, since the large-diameter flange portion 17c is continuously provided on the upper portion of the flange portion 17b, a finger can be hung between the flange portion 17b and the large-diameter flange portion 17c, and the transport protective plug 17 can be easily attached and detached. Can be done. Further, by forming the transport protective plug 17 with a resin, the transport protective plug 17 can be formed at low cost, and more preferably, by forming the transport protective plug 17 with an elastic resin, the transport protective plug 17 is suitable. It can be made elastic and workability is improved.
　なお、本発明の輸送用保護プラグは、上述の形態例のように、ブレーキ装置のシリンダ部に形成した通孔に用いられるものに限らず、内圧が発生する空間部を内部に備えた筐体に形成された通孔に、広く適用することができる。さらに、本発明の輸送用保護プラグは、フランジ部の上部に連続して大径フランジ部を備えていなくてもよく、また、連通孔の形状は内部の空間部と外気とを連通できるものあれば任意である。 The transport protection plug of the present invention is not limited to the one used for the through hole formed in the cylinder portion of the brake device as in the above-described embodiment, but is a housing provided with a space portion inside in which internal pressure is generated. It can be widely applied to the through holes formed in. Further, the transport protective plug of the present invention does not have to have a large-diameter flange portion continuously above the flange portion, and the shape of the communication hole is such that the internal space portion and the outside air can be communicated with each other. Is optional.
１…車両用ドラムブレーキ、２…バックプレート、３…ブレーキシュー、３ａ…ウェブ、３ｂ…リム、３ｃ…ライニング、４…ホイルシリンダ、４ａ…シリンダボディ、４ｂ…シリンダ孔、４ｃ…シリンダボディ側ブーツ溝、４ｄ…取付部、４ｅ…ユニオンボス部、５…アンカー、６…ピストン、６ａ…本体部、６ｂ…小径軸部、６ｃ…ピストンシール溝、６ｄ…ブーツ溝、６ｅ…ブレーキシュー装着溝、７ａ，７ｂ…リターンスプリング、８…制動間隙自動調整装置、９ａ…パーキングレバー、９ｂ…支軸、１０…液圧室、１１…ピストンスプリング、１２…ピストンシール、１３…ユニオン孔、１３ａ…雌ねじ孔、１３ｂ…小径孔、１４…ピストンブーツ、１５…ブリーダスクリュ、１６…輸送用パレット、１７…輸送用保護プラグ、１７ａ…筒部、１７ｂ…フランジ部、１７ｃ…大径フランジ部、１８…連通溝、１８ａ…第１溝部、１８ｂ…第２溝部 1 ... Vehicle drum brake, 2 ... Back plate, 3 ... Brake shoe, 3a ... Web, 3b ... Rim, 3c ... Lining, 4 ... Wheel cylinder, 4a ... Cylinder body, 4b ... Cylinder hole, 4c ... Cylinder body side boot Groove, 4d ... Mounting part, 4e ... Union boss part, 5 ... Anchor, 6 ... Piston, 6a ... Main body part, 6b ... Small diameter shaft part, 6c ... Piston seal groove, 6d ... Boot groove, 6e ... Brake shoe mounting groove, 7a, 7b ... Return spring, 8 ... Braking gap automatic adjustment device, 9a ... Parking lever, 9b ... Support shaft, 10 ... Hydraulic chamber, 11 ... Piston spring, 12 ... Piston seal, 13 ... Union hole, 13a ... Female screw hole , 13b ... Small diameter hole, 14 ... Piston boot, 15 ... Breeder brake, 16 ... Transport pallet, 17 ... Transport protection plug, 17a ... Cylinder part, 17b ... Flange part, 17c ... Large diameter flange part, 18 ... Communication groove , 18a ... 1st groove, 18b ... 2nd groove

Claims (5)

  1. 内圧が発生する空間部を内部に備えた筐体に、前記空間部の内外を連通させる通孔を形成した製品に用いられ、前記通孔に着脱可能に装着され、前記空間部を封止する輸送用保護プラグにおいて、
    前記通孔に挿入される筒部と、該筒部の一端部に設けられ、前記通孔の内径よりも大径に形成されるフランジ部とを一体に備えるとともに、前記空間部の内外を連通させる連通溝を形成したことを特徴とする輸送用保護プラグ。     It is used for products in which a through hole for communicating the inside and outside of the space portion is formed in a housing provided with a space portion for generating internal pressure, and is detachably attached to the through hole to seal the space portion. In the transport protection plug
    A tubular portion to be inserted into the through hole and a flange portion provided at one end of the tubular portion and formed to have a diameter larger than the inner diameter of the through hole are integrally provided, and the inside and outside of the space portion are communicated with each other. A protective plug for transportation characterized by forming a communication groove.
  2. 前記連通溝は、前記筒部の外周面に設けられ、該筒部の軸線方向に延出する第１溝部と、該第１溝部に連続して前記フランジ部の筒部側面に設けられ、該第１溝部に対して直交方向に延出する第２溝部とを備えていることを特徴とする請求項１記載の輸送用保護プラグ。 The communication groove is provided on the outer peripheral surface of the tubular portion, and is provided on the tubular portion side surface of the flange portion so as to be continuous with the first groove portion and the first groove portion extending in the axial direction of the tubular portion. The protective plug for transportation according to claim 1, further comprising a second groove portion extending in a direction orthogonal to the first groove portion.
  3. 前記フランジ部の上部に連続して、該フランジ部よりも大径に形成される大径フランジ部を設けたことを特徴とする請求項１又は２記載の輸送用保護プラグ。 The protective plug for transportation according to claim 1 or 2, wherein a large-diameter flange portion formed having a diameter larger than that of the flange portion is continuously provided on the upper portion of the flange portion.
  4. 樹脂で形成されることを特徴とする請求項１乃至３のいずれか１項記載の輸送用保護プラグ。 The transport protective plug according to any one of claims 1 to 3, wherein the protective plug is made of a resin.
  5. 前記筐体は、車両用ブレーキ装置のシリンダ部であり、前記通孔は、前記シリンダ部に形成されるユニオン孔であることを特徴とする請求項１乃至４のいずれか１項記載の輸送用保護プラグ。  The transportation according to any one of claims 1 to 4, wherein the housing is a cylinder portion of a vehicle braking device, and the through hole is a union hole formed in the cylinder portion. Protective plug.
PCT/JP2020/046505 2020-03-16 2020-12-14 Protection plug for transportation WO2021186815A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202080098611.8A CN115335612A (en) 2020-03-16 2020-12-14 Protective plug for conveying
JP2022508060A JP7442620B2 (en) 2020-03-16 2020-12-14 Transport protection plug

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JP2020045220 2020-03-16
JP2020-045220 2020-03-16

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WO2021186815A1 true WO2021186815A1 (en) 2021-09-23

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004011697A (en) * 2002-06-04 2004-01-15 Shin Ei Tech:Kk Plug member for air ventilation
JP2005076835A (en) * 2003-09-03 2005-03-24 Nissin Kogyo Co Ltd Liquid supply pipe connection structure of actuator for vehicles
JP2008079794A (en) * 2006-09-27 2008-04-10 Asahi Kasei Kuraray Medical Co Ltd Coupling for extracoporeal circulation module and medical adaptor equipped with the coupling
JP3152002U (en) * 2009-02-27 2009-07-16 株式会社島津製作所 Sealing plug and hydraulic device to which the sealing plug is attached
JP2019041074A (en) * 2017-08-29 2019-03-14 富士電機株式会社 Cooler for semiconductor module, plug member, and system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5467461B2 (en) 2010-03-17 2014-04-09 曙ブレーキ工業株式会社 Bleeder plug

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004011697A (en) * 2002-06-04 2004-01-15 Shin Ei Tech:Kk Plug member for air ventilation
JP2005076835A (en) * 2003-09-03 2005-03-24 Nissin Kogyo Co Ltd Liquid supply pipe connection structure of actuator for vehicles
JP2008079794A (en) * 2006-09-27 2008-04-10 Asahi Kasei Kuraray Medical Co Ltd Coupling for extracoporeal circulation module and medical adaptor equipped with the coupling
JP3152002U (en) * 2009-02-27 2009-07-16 株式会社島津製作所 Sealing plug and hydraulic device to which the sealing plug is attached
JP2019041074A (en) * 2017-08-29 2019-03-14 富士電機株式会社 Cooler for semiconductor module, plug member, and system

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JP7442620B2 (en) 2024-03-04
JPWO2021186815A1 (en) 2021-09-23

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