JPH04107593U - Bundled flexible tube - Google Patents
Bundled flexible tubeInfo
- Publication number
- JPH04107593U JPH04107593U JP1737691U JP1737691U JPH04107593U JP H04107593 U JPH04107593 U JP H04107593U JP 1737691 U JP1737691 U JP 1737691U JP 1737691 U JP1737691 U JP 1737691U JP H04107593 U JPH04107593 U JP H04107593U
- Authority
- JP
- Japan
- Prior art keywords
- hoses
- hose
- rubber
- surface layer
- bundle
- 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.)
- Pending
Links
- 229920001971 elastomer Polymers 0.000 claims abstract description 35
- 239000005060 rubber Substances 0.000 claims abstract description 23
- 239000000806 elastomer Substances 0.000 claims abstract description 12
- 239000002344 surface layer Substances 0.000 claims abstract description 11
- 239000007787 solid Substances 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 230000007774 longterm Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 17
- 239000010410 layer Substances 0.000 description 10
- 229920001084 poly(chloroprene) Polymers 0.000 description 7
- 239000011162 core material Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 239000000945 filler Substances 0.000 description 3
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000006082 mold release agent Substances 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 240000000491 Corchorus aestuans Species 0.000 description 1
- 235000011777 Corchorus aestuans Nutrition 0.000 description 1
- 235000010862 Corchorus capsularis Nutrition 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Landscapes
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
(57)【要約】
【目的】 複数のホースを結束することにより取り扱い
が簡単で且つホースの損傷がなく、各ホース内を搬送さ
れる液体等に圧力差がある場合でも振動又は捩れが殆ど
なく、更に内部への水や油或はガス等の侵入を防止で
き、長期間の使用に耐え得る結束型フレキシブル管を提
供する。
【構成】 同種のゴム又はエラストマーからなる外面層
を有する複数のホース１と、該ホース１の外面層と同種
のゴム又はエラストマーからなっていて、内部に複数の
ホース１を長手方向に沿い埋設した中実の長尺線状又は
棒状の結束体２とを備え、各ホース１の外面層と結束体
２とが端部を除いて接着し一体化されていることを特徴
とする結束型フレキシブル管。
(57) [Summary] [Purpose] By bundling multiple hoses, handling is easy and there is no damage to the hoses, and there is almost no vibration or twisting even when there is a pressure difference in the liquid conveyed within each hose. Furthermore, the present invention provides a bundled flexible pipe that can prevent water, oil, gas, etc. from entering the inside and can withstand long-term use. [Structure] A plurality of hoses 1 each having an outer surface layer made of the same kind of rubber or elastomer, and a plurality of hoses 1 made of the same kind of rubber or elastomer as the outer surface layer of the hoses 1, with the plurality of hoses 1 buried inside along the longitudinal direction. A bundled flexible tube comprising a solid long wire-shaped or rod-shaped bundle 2, and characterized in that the outer surface layer of each hose 1 and the bundle 2 are bonded and integrated except for the ends. .
Description
【０００１】0001
本考案は、複数のホースをゴム又はエラストマーで結束して一体化した結束型 フレキシブル管に関する。 This invention is a bundled type that combines multiple hoses with rubber or elastomer. Regarding flexible pipes.
【０００２】0002
各種化学製造工業や建設ボーリング現場等においては、２種以上の水や油等の 液体或はガスを複数のホースを通して同時に、同一方向に又は逆方向に搬送する 場合がある。 In various chemical manufacturing industries, construction boring sites, etc., two or more types of water, oil, etc. Convey liquid or gas through multiple hoses simultaneously, in the same direction or in opposite directions There are cases.
【０００３】 かかる場合、一般的には必要本数のホースをそれぞれ単独で用いるか、又は各 ホースを束ねてバンド等で数箇所結束して使用していた。しかしこの方法では、 ホースの取り扱い及び設置が面倒であるうえ、２種以上の液体やガスの搬送に伴 って各ホースが様々な方向に様々な周期で振動する等の不都合があり、ホース自 体も露出しているため損傷しやすかった。0003 In such cases, generally the required number of hoses are used individually, or each The hoses were tied together in several places using bands, etc. But with this method, Handling and installation of hoses is troublesome, and it is difficult to handle and install hoses when transporting two or more types of liquids or gases. This causes inconveniences such as each hose vibrating in various directions and at various cycles, and the hose itself Their bodies were also exposed, making them vulnerable to damage.
【０００４】 そこで、複数のホースを予めシース等により結束した管や、更に電気的制御を 行うための電気ケーブル等もホースと一緒に結束した管が提案されている。例え ば、実公昭36−18962号公報には中空管や電気ケーブル等を複数本集め、その外 側にゴムやプラスチックの保護シースを施した結束管が記載されている。又、特 公昭44−4838号公報や特公昭51−25613号公報には、複数のホースを撚り合わせ てプラスチック等の外被で覆い、その空間に繊維状物質又は海綿状物質の充填材 を充填した結束管が開示されている。0004 Therefore, we have decided to use tubes in which multiple hoses are bundled in advance with a sheath, etc., or electrically controlled tubes. It has been proposed that the electrical cables used for this purpose be bundled together with hoses. example For example, Publication No. 36-18962 collects multiple hollow tubes, electric cables, etc. A binding tube with a protective rubber or plastic sheath on the side is described. Also, special In Publication No. 44-4838 and Special Publication No. 51-25613, multiple hoses are twisted together. Cover the space with an outer covering such as plastic, and fill the space with a fibrous or spongy material. A binding tube filled with
【０００５】 しかし、従来提案されたこれらの結束管においては、各ホースが保護シース又 は外被と接着固定されておらず、更には充填材とも接着固定されていないので、 引張や曲げに対する強度が低く、又各ホース内を搬送される液体等に圧力差があ ると結束管が振動したり又は捩れたりし、短期間の間に結束が緩んでホースの位 置関係がズレたり、ホースが内部で局所的に摩耗する等の欠点があった。又、保 護シースや外被内の各ホースの間は空隙になつているか、充填材が充填されてい ても繊維状又は海綿状の物質であるため、結束管の内部に水や油或はガス等が侵 入しやすく、使用環境によっては或は長期間使用する間にはホースや保護シース 又は充填材等が腐食したり劣化する危険があった。[0005] However, in these bundling tubes proposed so far, each hose is covered with a protective sheath or is not adhesively fixed to the outer sheath, and furthermore is not adhesively fixed to the filling material. It has low strength against tension and bending, and there is a pressure difference between the liquids conveyed in each hose. If this occurs, the binding tube may vibrate or become twisted, and the binding may loosen over a short period of time, causing the hose to become There were drawbacks such as misalignment and local wear of the hose. Also, keep The spaces between each hose within the protective sheath or jacket are either air gaps or filled with filler material. However, since it is a fibrous or spongy material, water, oil, gas, etc. may invade the inside of the bundling pipe. Depending on the usage environment or during long-term use, hoses and protective sheaths may be necessary. Or there was a risk that the filling material etc. would corrode or deteriorate.
【０００６】[0006]
本考案はかかる従来の事情に鑑み、複数のホースを結束することにより取り扱 いが簡単で且つホースの損傷がなく、各ホース内を搬送される液体等に圧力差が ある場合でも振動又は捩れが殆どなく、更に内部への水や油或はガス等の侵入を 防止でき、長期間の使用に耐え得る結束型フレキシブル管を提供することを目的 とする。 In view of such conventional circumstances, the present invention is designed to handle the problem by bundling multiple hoses together. It is easy to use, does not damage the hoses, and eliminates pressure differences between the liquids, etc. conveyed within each hose. Even if there is, there is almost no vibration or twisting, and furthermore, there is no intrusion of water, oil, gas, etc. into the interior. The purpose is to provide a bundled flexible pipe that can prevent damage and withstand long-term use. shall be.
【０００７】[0007]
上記目的を達成するため、本考案の結束型フレキシブル管においては、同種の ゴム又はエラストマーからなる外面層を有する複数のホースと、該ホースの外面 層と同種のゴム又はエラストマーからなっていて、内部に前記複数のホースを長 手方向に沿い埋設した中実の長尺線状又は棒状の結束体とを備え、前記ホースの 外面層と結束体とが端部を除いて接着し一体化されていることを特徴とする。 In order to achieve the above purpose, in the bundled flexible pipe of the present invention, the same kind of a plurality of hoses having an outer layer of rubber or elastomer; and an outer surface of the hoses; It is made of the same type of rubber or elastomer as the layer, and has the plurality of long hoses inside. A solid long wire-shaped or rod-shaped bundle buried along the direction of the hose, It is characterized in that the outer layer and the bundle are bonded and integrated except for the ends.
【０００８】 次に、本考案の結束型フレキシブル管の製造を図２により説明する。同種のゴ ム又はエラストマーの外面層を有する複数のホース１を前もつて作製し、この各 ホース１と同種のゴム又はエラストマーからなる芯材３の回りに前記各ホース１ （予め端部に離型剤を塗布するか又はテープ等を巻いておく）を長手方向に沿っ て直線状又は螺旋状に施し、更にその外周を前記芯材３と同種のゴム又はエラス トマーからなる被覆材４で被覆した後、外周に布等を巻き付けて長尺の棒状又は 線状に成形して加圧した状態で加硫すればよく、この方法により前記被覆材４と 芯材３のゴム又はエラストマーが図１に示すごとく互いにホース１の間を埋めて 中実となり、且つホース１の外面層と接着して一体化する。[0008] Next, manufacturing of the bundled flexible tube of the present invention will be explained with reference to FIG. 2. same species A plurality of hoses 1 having an outer surface layer of rubber or elastomer are prepared in advance, each of which Each of the hoses 1 is placed around a core material 3 made of the same type of rubber or elastomer as the hose 1. (apply a release agent to the edges in advance or wrap tape, etc.) along the longitudinal direction. The outer periphery is coated with the same type of rubber or elastomer as the core material 3. After being coated with the covering material 4 made of Tomer, a cloth or the like is wrapped around the outer periphery to form a long rod or It is sufficient to form it into a linear shape and vulcanize it under pressure, and by this method, the coating material 4 and The rubber or elastomer of the core material 3 fills the space between the hoses 1 as shown in Figure 1. It becomes solid and is bonded and integrated with the outer surface layer of the hose 1.
【０００９】 尚、図１の結束型フレキシブル管においては各ホース１が総て互いに接触した 構造を図示してあるが、各ホース１は総てが又は一部が互いに離れた状態で結束 体２により結束されていても良い。ホース１は外面層の材質が限定される以外は いかなる構造であっても良く、例えば内面層から外面層まで単一の材質で構成さ れても良いし、或は内部に繊維や金属線を編組し又は巻き付けた補強層を設ける ことも可能である。[0009] In addition, in the bundled flexible pipe shown in Fig. 1, all the hoses 1 were in contact with each other. Although the structure is illustrated, each hose 1 is bundled with all or some parts separated from each other. They may be bound together by the body 2. Hose 1 has the following features except that the material of the outer layer is limited. It may have any structure, for example, it may be made of a single material from the inner layer to the outer layer. Alternatively, a reinforcing layer made of braided or wrapped fibers or metal wires may be provided inside. It is also possible.
【００１０】0010
本考案の結束型フレキシブル管では、前記したように結束される複数のホース の外面層とこれらを埋設する結束体の材質が同種のゴム又はエラストマーからな るので、製造過程での加硫により各ホースと結束体とが互いに接着し、しかもホ ースを除いた結束体自体は空隙のない中実状態になっている。 In the bundled flexible pipe of the present invention, multiple hoses are bundled as described above. The material of the outer surface layer of the Therefore, each hose and bundle adhere to each other through vulcanization during the manufacturing process, and the hoses are bonded together. The bundle itself, excluding the base, is solid with no voids.
【００１１】 従って、本考案の結束型フレキシブル管は全体が一体化しており、引張や曲げ に対する強度が高くなるばかりか、各ホース内を搬送される液体等に圧力差があ つても結束管の振動又は捩れを防止でき若しくは大幅に低減される。その結果、 使用中に各ホースの結束が緩むことがなく、又ホースが内部で擦れて局所的に摩 耗することを防止できる。更に、この結束型フレキシブル管は中実で且つホース との間にも隙間がないので、内部に水や油或はガス等が侵入せず、長期間使用し てもホースや結束体が腐食又は劣化しない。[0011] Therefore, the bundled flexible pipe of the present invention is integrated as a whole, so it is not prone to tension or bending. Not only does this increase the strength against the Vibration or twisting of the binding tube can be prevented or significantly reduced even when the tube is tied. the result, The binding of each hose does not come loose during use, and the hoses do not rub internally and cause local wear. Can prevent wear and tear. Furthermore, this bundled flexible pipe is solid and can be used as a hose. Since there is no gap between the The hose and bundle will not corrode or deteriorate even if
【００１２】 一方、結束型フレキシブル管の端部では各ホースと結束体とが接着していない ので、各ホース端部を結束体からそれぞれ分離して容易に取り出し、各ホースに 必要な接続金具等を取り付けることが出来る。0012 On the other hand, at the ends of bundled flexible pipes, each hose and bundle are not bonded. Therefore, separate each hose end from the bundle and take it out easily, and attach it to each hose. Necessary connection fittings etc. can be attached.
【００１３】 尚、本考案の結束型フレキシブル管においても、前記ホース以外に電気ケーブ ル等を一緒に結束することが可能である。例えば、図３は結束体２内に太いホー ス５と細いホース６と電気ケーブル７を各々2本づつ埋設して一体化した結束型 フレキシブル管である。但し、この様な場合においても、電気ケーブル７等の最 外周に結束体２と同種のゴム又はエラストマーからなる外面層を設けることが望 ましい。[0013] In addition, in the bundled flexible pipe of the present invention, in addition to the above-mentioned hose, an electric cable is also used. It is possible to tie the items together. For example, in Figure 3, there is a thick hole inside the bundle 2. A bundle type in which two each of the hose 5, thin hose 6, and electric cable 7 are buried and integrated. It is a flexible tube. However, even in such a case, if the electrical cable 7 etc. It is desirable to provide an outer surface layer made of the same type of rubber or elastomer as the bundle 2 on the outer periphery. Delicious.
【００１４】[0014]
結束すべきホースとして、アクリルニトリル−ブタジエンゴム（ＮＢＲ）の内 面層と、その外周に直径が0.32mmのワイヤーを編組して形成した補強層と、更に その外周に設けたクロロプレンゴム（ＣＲ）の外面層とからなり、内径9.5mm及 び外径16.4mmの耐圧140kg／cm2用ゴムホース3本を予め準備した。各ゴムホース の両端部約500mmに離型剤を各々塗布した後、これら3本のゴムホースを別に用意 した直径3.6mmのＣＲの芯材の外周に長手方向に沿って螺旋状に互いに接触させ て巻き付け、その外周にＣＲの被覆材を約4.0mmの厚さに被覆した。次に、前記 被覆材の外周に布を巻き付けて外径43.0mmになるように成形し、そのまま加硫缶 にいれ150℃で1時間加硫した。The hose to be bundled has an inner layer of acrylonitrile-butadiene rubber (NBR), a reinforcing layer formed by braiding wire with a diameter of 0.32 mm around the outer periphery, and a layer of chloroprene rubber (CR) provided around the outer periphery. Three rubber hoses having an inner diameter of 9.5 mm and an outer diameter of 16.4 mm and having a pressure resistance of 140 kg/cm 2 were prepared in advance. After applying a mold release agent to approximately 500 mm at both ends of each rubber hose, these three rubber hoses are wound around the outer periphery of a separately prepared CR core material with a diameter of 3.6 mm in a spiral manner in contact with each other along the longitudinal direction. , and a CR coating material was coated on its outer periphery to a thickness of about 4.0 mm. Next, a cloth was wrapped around the outer periphery of the covering material to form it to an outer diameter of 43.0 mm, and the material was placed in a vulcanizing can and vulcanized at 150° C. for 1 hour.
【００１５】 得られた結束型フレキシブル管は、互いに接触した3本のゴムホースの外側及 び内側を被覆材及び芯材として施したＣＲが中実の結束体となって隙間なく埋め 、且つ各ゴムホースの外面層のＣＲと結束体のＣＲとが接着することにより一体 化した構造になっていた。但し、予め離型剤を塗布した各ゴムホースの両端部は 結束体と接着せず、簡単に引き剥がすことが出来た。[0015] The obtained bundled flexible tube is made of three rubber hoses that are in contact with each other and The CR applied to the inner side as a covering material and a core material forms a solid bundle and fills it without any gaps. , and the CR of the outer surface layer of each rubber hose and the CR of the bundle are bonded together to form one body. It had a structured structure. However, both ends of each rubber hose are coated with mold release agent in advance. It did not adhere to the bundle and could be easily peeled off.
【００１６】 比較例として、図４のごとく3本のゴムホース１の間に充填材８としてジュー トを充填し、その周囲を不織布９でテーピングした後、塩化ビニル（ＰＶＣ）の 外被１０を設けた従来技術による結束型フレキシブル管を製造した。得られた比 較例の結束型フレキシブル管では、各ゴムホース１とジュートの充填材８とＰＶ Ｃの外被１０とが異種材質からなるため、互いに接着していなかった。[0016] As a comparative example, as shown in Figure 4, juice was placed between three rubber hoses 1 as a filler 8. After filling the container and taping the surrounding area with non-woven fabric 9, a polyvinyl chloride (PVC) A bundled flexible tube according to the prior art provided with a jacket 10 was manufactured. The resulting ratio In the comparative bundled flexible pipe, each rubber hose 1, jute filler 8, and PV Since the outer sheath 10 of C was made of different materials, they were not adhered to each other.
【００１７】 次に、前記本考案例と比較例の各結束型フレキシブル管について、各ゴムホー ス端部にそれぞれ接続金具を取り付け、各々3本のホースに異なる圧力（140kg／ cm2、70kg／cm2、10kg／cm2）で水を圧送したところ、本考案例の結束型フレキ シブル管では捩れが殆ど起こらなかったのに対して、比較例の結束型フレキシブ ル管では捩れが反復して起こり、各ゴムホースの結束が緩んで結束体との相対的 位置関係にズレが発生した。Next, for each of the bundled flexible tubes of the present invention example and comparative example, connecting fittings were attached to the ends of each rubber hose, and different pressures (140 kg/cm 2 , 70 kg/cm 2 ) were applied to each of the three hoses. , 10 kg/cm 2 ), the bundled flexible tube of the present invention hardly twisted, whereas the bundled flexible tube of the comparative example repeatedly twisted, causing each rubber hose to twist. The binding became loose and the relative positional relationship with the binding body became misaligned.
【００１８】[0018]
本考案によれば、取り扱いが簡単で且つ内部に埋設されたホースに損傷が起こ り難く、各ホース内を搬送される液体等に圧力差がある場合でも振動又は捩れが 殆どなく、従って各ホースの位置ズレや局所的摩耗が発生しないうえ、内部に水 や油或はガス等が侵入しないので腐食や劣化が抑制され、長期間にわたり安定し て使用できる結束型フレキシブル管を提供できる。 According to the present invention, it is easy to handle and does not cause damage to the hose buried inside. vibration or twisting even when there is a pressure difference in the liquid conveyed within each hose. Therefore, there is no misalignment or local wear of each hose, and there is no water inside. Corrosion and deterioration are suppressed because there is no intrusion of oil, gas, etc., and it is stable for a long period of time. It is possible to provide bundled flexible pipes that can be used for various purposes.
【図１】本考案による結束型フレキシブル管の一具体例
を示す断面図である。FIG. 1 is a sectional view showing a specific example of a bundled flexible tube according to the present invention.
【図２】本考案による結束型フレキシブル管の製造方法
を説明するための一部切り欠き側面図である。FIG. 2 is a partially cutaway side view illustrating a method of manufacturing a bundled flexible tube according to the present invention.
【図３】本考案による結束型フレキシブル管の別の具体
例を示す断面図である。FIG. 3 is a sectional view showing another example of the bundled flexible tube according to the present invention.
【図４】比較例の結束型フレキシブル管を示す断面図で
ある。FIG. 4 is a sectional view showing a bundled flexible tube of a comparative example.
１ ホース ２ 結束体 ３ 芯材 ４ 被覆材 ５ 太いホース ６ 細いホース ７ 電気ケーブル ８ 充填材 ９ 不織布 １０ 外被 1 hose 2 Binding body 3 Core material 4 Covering material 5 Thick hose 6 Thin hose 7 Electric cable 8 Filling material 9 Non-woven fabric 10 Outer cover
Claims (1)
面層を有する複数のホースと、該ホースの外面層と同種
のゴム又はエラストマーからなっていて、内部に前記複
数のホースを長手方向に沿い埋設した中実の長尺線状又
は棒状の結束体とを備え、前記ホースの外面層と結束体
とが端部を除いて接着し一体化されていることを特徴と
する結束型フレキシブル管。Claim 1: A hose comprising a plurality of hoses each having an outer surface layer made of the same kind of rubber or elastomer, and a plurality of hoses made of the same kind of rubber or elastomer as the outer surface layer of the hoses, with the plurality of hoses buried inside along the longitudinal direction. What is claimed is: 1. A bundled flexible tube comprising a solid elongated linear or rod-shaped bundle, wherein the outer surface layer of the hose and the bundle are bonded and integrated except for the ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1737691U JPH04107593U (en) | 1991-02-28 | 1991-02-28 | Bundled flexible tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1737691U JPH04107593U (en) | 1991-02-28 | 1991-02-28 | Bundled flexible tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04107593U true JPH04107593U (en) | 1992-09-17 |
Family
ID=31904152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1737691U Pending JPH04107593U (en) | 1991-02-28 | 1991-02-28 | Bundled flexible tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04107593U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013210026A (en) * | 2012-03-30 | 2013-10-10 | Osaka Gas Co Ltd | Tube structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5089448A (en) * | 1973-12-13 | 1975-07-17 |
-
1991
- 1991-02-28 JP JP1737691U patent/JPH04107593U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5089448A (en) * | 1973-12-13 | 1975-07-17 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013210026A (en) * | 2012-03-30 | 2013-10-10 | Osaka Gas Co Ltd | Tube structure |
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