JP6670058B2 - Cartridge tank - Google Patents

Cartridge tank Download PDF

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JP6670058B2
JP6670058B2 JP2015165428A JP2015165428A JP6670058B2 JP 6670058 B2 JP6670058 B2 JP 6670058B2 JP 2015165428 A JP2015165428 A JP 2015165428A JP 2015165428 A JP2015165428 A JP 2015165428A JP 6670058 B2 JP6670058 B2 JP 6670058B2
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side wall
ring
wall
shaped portion
opening
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JP2017044231A (en
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嘉智 佐藤
嘉智 佐藤
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Lube Corp
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Description

本発明は、工作機械や射出成形機等の産業機械等に設けられる潤滑ポンプに取り付けられてグリス等の流動状の潤滑剤を供給する可撓樹脂製のカートリッジタンクに関する。   The present invention relates to a cartridge tank made of a flexible resin which is attached to a lubrication pump provided in an industrial machine such as a machine tool or an injection molding machine and supplies a fluid lubricant such as grease.

従来、この種のカートリッジタンクとしては、例えば、本願出願人が先に提案した特許文献１（特開２０１２−７２８９１号公報）に記載されたものが知られている。
図３に示すように、このカートリッジタンクＴａは、図示外の潤滑ポンプに取り付けられるとともにブロー成形により成形され内部空間Ｅに充填された図示外の潤滑剤を潤滑ポンプに供給するもので、山部２と谷部３とが軸方向に交互に形成され軸方向に伸縮可能な蛇腹筒状の側壁１と、側壁１の一端縁１ａに一体に連設される底壁４と、側壁１の他端縁１ｂに一体に連設されるとともに側壁１と同軸の外開口６及び内開口７を有した通路８が形成され潤滑ポンプに取り付けられる筒状の取付口部５とを備えている。 Conventionally, as this kind of cartridge tank, for example, the one described in Patent Document 1 (Japanese Patent Application Laid-Open No. 2012-72891) previously proposed by the present applicant is known.
As shown in FIG. 3, the cartridge tank Ta is attached to a lubrication pump (not shown) and supplies a lubrication pump (not shown) which is formed by blow molding and filled in the internal space E to the lubrication pump. 2 and a valley portion 3 are formed alternately in the axial direction, and a bellows-shaped cylindrical side wall 1 which can be expanded and contracted in the axial direction, a bottom wall 4 integrally connected to one end 1a of the side wall 1, A passage 8 having an outer opening 6 and an inner opening 7 coaxially formed with the side wall 1 and integrally formed with the end edge 1b is formed, and has a cylindrical mounting opening 5 to be mounted on the lubrication pump.

取付口部５は、側壁１の他端縁１ｂに連設され側壁１の外径よりも小さい外径を有するリング状部１０と、リング状部１０に連設されるとともに外周に雄ネジ１１が形成されリング状部１０の最大外径よりも小さい外径を有する雄ネジ部１２とを備えて構成されている。リング状部１０の外側には、周方向に沿う溝１３が形成され、リング状部１０は、溝１３の側壁１側の一側面１３ａを形成する一方リング状部１４，溝１３の雄ネジ部１１側の他側面１３ｂを形成する他方リング状部１５，溝１３の底面１３ｃを形成する中間リング状部１６を備えて構成されている。一方リング状部１４と他方リング状部１６の外径は同じに形成されている。   The mounting opening 5 is connected to the other end 1b of the side wall 1 and has a ring-shaped portion 10 having an outer diameter smaller than the outer diameter of the side wall 1; And a male screw portion 12 having an outer diameter smaller than the maximum outer diameter of the ring-shaped portion 10. On the outer side of the ring-shaped portion 10, a groove 13 is formed along the circumferential direction. The ring-shaped portion 10 forms one side surface 13a on the side wall 1 side of the groove 13, while the ring-shaped portion 14 and the male screw portion of the groove 13 are formed. It is provided with a ring-shaped portion 15 forming the other side surface 13b on the 11th side and an intermediate ring-shaped portion 16 forming the bottom surface 13c of the groove 13. The outer diameters of the one ring-shaped part 14 and the other ring-shaped part 16 are formed to be the same.

そして、このカートリッジタンクＴａを潤滑ポンプに取り付けるときは、取付口部５の雄ネジ部１２を潤滑ポンプの取付部の雌ネジ部にねじ込んで取り付ける。この状態で、潤滑ポンプを作動させると、潤滑ポンプの吸引力によってカートリッジタンクＴａ内の潤滑剤が吸引され、潤滑剤はこの潤滑ポンプから所望の潤滑個所に吐出される。図４に示すように、カートリッジタンクＴａの潤滑剤が吸引されて徐々に消費されると、蛇腹筒状の側壁１が徐々に収縮し、収縮しきったところで、潤滑剤がなくなったとして、カートリッジタンクＴａを新しいものと交換する。   When the cartridge tank Ta is mounted on the lubrication pump, the male screw portion 12 of the mounting port 5 is screwed into the female screw portion of the mounting portion of the lubrication pump. When the lubrication pump is operated in this state, the lubricant in the cartridge tank Ta is sucked by the suction force of the lubrication pump, and the lubricant is discharged from the lubrication pump to a desired lubrication point. As shown in FIG. 4, when the lubricant in the cartridge tank Ta is sucked and gradually consumed, the bellows-like cylindrical side wall 1 is gradually contracted. Replace Ta with a new one.

特開２０１２−７２８９１号公報JP 2012-72891 A

ところで、この従来のカートリッジタンクＴａにおいては、図４に示すように、潤滑ポンプの吸引により、蛇腹筒状の側壁１が収縮しきったところで潤滑剤がなくなったとして、新しいものと交換するが、一方リング状部１４は肉厚になっているので剛性が高いことから、この一方リング状部１４に連設する側壁１の一端縁１ａ近傍が外開口６側に折れ曲がりにくくなっている。そのため、底壁内面４ａと取付口部５の通路８の内開口７側との間に生じる空間Ｅａが大きくなってしまい、この空間内に残る潤滑剤が多くなって無駄になり、不経済になるという問題があった。   By the way, in this conventional cartridge tank Ta, as shown in FIG. 4, the lubricant is exhausted when the bellows-shaped cylindrical side wall 1 is completely contracted by suction of the lubrication pump, and is replaced with a new one. Since the ring-shaped portion 14 is thick and has high rigidity, the vicinity of one end 1a of the side wall 1 connected to the ring-shaped portion 14 is hardly bent toward the outer opening 6 side. Therefore, the space Ea generated between the inner surface 4a of the bottom wall and the inner opening 7 side of the passage 8 of the mounting opening 5 becomes large, and the amount of lubricant remaining in this space increases, resulting in waste and uneconomical. There was a problem of becoming.

本発明は、このような問題点に鑑みてなされたもので、蛇腹筒状の側壁が収縮しきった際に、底壁内面と取付口部の通路の内開口側との間に生じる空間ができるだけ小さくなるようにし、この空間内に残る潤滑剤の量を極力減らして、潤滑剤の残留量を低減して無駄を防止し省力化を図ったカートリッジタンクを提供することを目的とする。   The present invention has been made in view of such a problem, and when the bellows-shaped cylindrical side wall is completely contracted, the space generated between the inner surface of the bottom wall and the inner opening side of the passage of the mounting port is as small as possible. An object of the present invention is to provide a cartridge tank which is reduced in size, reduces the amount of lubricant remaining in this space as much as possible, reduces the residual amount of lubricant, prevents waste, and saves labor.

このような目的を達成するため、本発明のカートリッジタンクは、潤滑ポンプに取り付けられるとともにブロー成形により成形され内部空間に充填された潤滑剤を該潤滑ポンプに供給する樹脂製のカートリッジタンクにおいて、
山部と谷部とが軸方向に交互に形成され軸方向に伸縮可能な蛇腹筒状の側壁と、該側壁の一端縁に一体に連設される底壁と、上記側壁の他端縁に一体に連設されるとともに該側壁と同軸の外開口及び内開口を有した通路が形成され上記潤滑ポンプに取り付けられる筒状の取付口部とを備え、
該取付口部を、上記側壁の他端縁に連設され該側壁の外径よりも小さい外径を有するリング状部と、該リング状部に連設されるとともに外周に雄ネジが形成され該リング状部の最大外径と同じ若しくはこれよりも小さい外径を有する雄ネジ部とを備えて構成し、
上記リング状部の外側に周方向に沿う溝を形成し、該リング状部を、上記溝の上記側壁側の一側面を形成する一方リング状部，上記溝の上記雄ネジ部側の他側面を形成する他方リング状部，上記溝の底面を形成する中間リング状部を備えて構成し、上記一方リング状部の外径よりも上記他方リング状部の外径を小さく形成し、
上記一方リング状部の外側と内開口との間であって、該一方リング状部の上記側壁側の内部空間に面する部分を周方向に沿って切除し、該一方リング状部に上記側壁の一端縁から略軸方向に沿って立ち上がる始端を有した可撓薄肉状の縦壁を形成し、上記内部空間の潤滑剤の消費により上記側壁が縮小した際、該縮小した側壁の上記取付口部側が上記縦壁の始端を通り軸方向に直交する平面よりも上記外開口側に位置するようにした構成としている。 In order to achieve such an object, the cartridge tank of the present invention is a resin cartridge tank that is attached to a lubrication pump and supplies the lubricant filled in the internal space formed by blow molding to the lubrication pump.
Crests and valleys are alternately formed in the axial direction, and the bellows-shaped cylindrical side wall is extendable and contractable in the axial direction, a bottom wall integrally connected to one end of the side wall, and the other end of the side wall. A passage having an outer opening and an inner opening coaxially with the side wall and being formed integrally with the side wall, and having a cylindrical mounting port attached to the lubricating pump;
A ring-shaped portion connected to the other end of the side wall and having an outer diameter smaller than the outer diameter of the side wall; and a male screw formed on the outer periphery and connected to the ring-shaped portion. A male screw portion having an outer diameter equal to or smaller than the maximum outer diameter of the ring-shaped portion,
A groove is formed along the circumferential direction outside the ring-shaped portion, and the ring-shaped portion forms one side surface of the groove on the side wall side, while the ring-shaped portion and the other side surface of the groove on the male screw portion side And an intermediate ring-shaped portion forming the bottom surface of the groove. The outer diameter of the other ring-shaped portion is formed smaller than the outer diameter of the one ring-shaped portion.
A portion of the one ring-shaped portion between the outside and the inner opening and facing the inner space on the side wall side of the one ring-shaped portion is cut along the circumferential direction, and the one ring-shaped portion is cut off along the side wall. Forming a flexible thin vertical wall having a starting end rising substantially in the axial direction from one end edge of the side wall, and when the side wall is reduced due to consumption of the lubricant in the internal space, the mounting opening of the reduced side wall is formed. The part side is located on the outer opening side with respect to a plane passing through the starting end of the vertical wall and orthogonal to the axial direction.

これにより、このカートリッジタンクを潤滑ポンプに取り付けるときは、取付口部の雄ネジ部を潤滑ポンプの取付部の雌ネジ部にねじ込んで取り付ける。この状態で、潤滑ポンプを作動させると、カートリッジタンク内の潤滑剤が徐々に消費され、これに従って、蛇腹筒状の側壁が徐々に収縮し、収縮しきったところで、潤滑剤がなくなったとして、カートリッジタンクを新しいものと交換する。この場合、一方リング状部には側壁の一端縁から略軸方向に沿って立ち上がる始端を有した可撓薄肉状の縦壁が形成されているので、この縦壁及びこれに連続する側壁の一端縁近傍の剛性が小さくなって外側に折れ曲がりやすくなっており、そのため、縮小した側壁の取付口部側が縦壁の始端を通り軸方向に直交する平面よりも外開口側に位置するので、底壁内面と取付口部の通路の内開口側との間に生じる空間がそれだけ小さくなり、この空間内に残る潤滑剤の量を極力減らすことができ、潤滑剤の残留量を低減して無駄を防止し省力化を図ることができる。 Thus, when this cartridge tank is mounted on the lubrication pump, the male screw portion of the mounting port is screwed into the female screw portion of the mounting portion of the lubrication pump. In this state, when the lubrication pump is operated, the lubricant in the cartridge tank is gradually consumed, and accordingly, the bellows-like cylindrical side wall gradually contracts. Replace the tank with a new one. In this case, the ring-shaped portion is formed with a flexible thin-walled vertical wall having a starting end that rises substantially in the axial direction from one end edge of the side wall. The rigidity in the vicinity of the edge is reduced and it is easy to bend outward, so that the mounting opening side of the reduced side wall is located closer to the outer opening than the plane passing through the starting end of the vertical wall and orthogonal to the axial direction, so that the bottom wall The space created between the inner surface and the inner opening side of the passage of the mounting opening becomes smaller accordingly, the amount of lubricant remaining in this space can be reduced as much as possible, and the amount of residual lubricant is reduced and waste is prevented. Labor can be saved.

そして、本発明の特徴は、上記の通り、上記リング状部の外側に周方向に沿う溝を形成し、該リング状部を、上記溝の上記側壁側の一側面を形成する一方リング状部，上記溝の上記雄ネジ部側の他側面を形成する他方リング状部，上記溝の底面を形成する中間リング状部を備えて構成し、上記一方リング状部の外径よりも上記他方リング状部の外径を小さく形成し、上記一方リング状部に、上記縦壁を形成した構成にある。 The feature of the present invention is that, as described above, a groove is formed along the circumferential direction outside the ring-shaped portion, and the ring-shaped portion forms one side surface on the side wall side of the groove. A second ring-shaped portion forming the other side surface of the groove on the side of the male screw portion, and an intermediate ring-shaped portion forming a bottom surface of the groove, wherein the other ring is larger than the outer diameter of the one ring-shaped portion. The outer diameter of the shape portion is formed small, and the vertical wall is formed in the one ring shape portion .

これにより、ブロー成形においては、成形型によって側壁，底壁及び取付口部に対応する部位を保持し、取付口部の外開口に対応する部分からエアを吹き込むが、この際に、取付口部に溝があるので、中間リング状部の直径方向の肉厚が薄くなっており、しかも、一方リング状部の外径よりも他方リング状部の外径を小さく形成しているので、他方リング状部の直径方向の肉厚も薄くなることから、成形時の蛇腹筒状の側壁側の成形、及び、縦壁の成形においての負担がかからなくなり、また、冷却の時間が速くなることから、冷却の間に材料がダレてしまう事態が抑制され、蛇腹筒状の側壁の肉厚、及び、縦壁の肉厚が均一になりやすく、内面も滑らかに形成することができる。   Thereby, in the blow molding, the side wall, the bottom wall, and the portion corresponding to the mounting opening are held by the molding die, and air is blown from the portion corresponding to the outer opening of the mounting opening. Since the intermediate ring-shaped portion has a smaller thickness in the diameter direction because of the groove, and the outer diameter of the other ring-shaped portion is formed smaller than the outer diameter of the one ring-shaped portion, Since the wall thickness in the diameter direction of the shaped portion is also reduced, the burden on forming the side wall side of the bellows cylindrical shape at the time of forming and the burden on forming the vertical wall are eliminated, and the cooling time is shortened. The situation in which the material is dripped during cooling is suppressed, and the thickness of the side wall of the bellows-shaped cylinder and the thickness of the vertical wall are easily made uniform, and the inner surface can be formed smoothly.

更に、必要に応じ、上記一方リング状部の縦壁の終端に連続するとともに上記溝の上記側壁側の一側面に対応した横壁を形成し、該横壁の少なくとも上記縦壁の終端側を可撓薄肉状に形成した構成としている。横壁も薄肉状になるので、この横壁も剛性が小さくなって外側に折れ曲がりやすくなり、そのため、縮小した側壁の取付口部側が縦壁の始端を通り軸方向に直交する平面よりもより一層外開口側に位置するようになり、底壁内面と取付口部の通路の内開口側との間に生じる空間がより一層小さくなり、潤滑剤の残留量をより一層低減することができる。   Further, if necessary, a horizontal wall which is continuous with the terminal of the vertical wall of the one ring-shaped portion and which corresponds to one side surface of the groove on the side wall side is formed, and at least the terminal end side of the vertical wall of the horizontal wall is flexible. It is configured to be thin. Since the side wall also becomes thin, the side wall also has a low rigidity and is easily bent outward, so that the mounting opening side of the reduced side wall passes through the starting end of the vertical wall and is more outwardly opened than a plane orthogonal to the axial direction. Side, the space generated between the inner surface of the bottom wall and the inner opening side of the passage of the mounting opening portion is further reduced, and the residual amount of the lubricant can be further reduced.

更にまた、必要に応じ、上記通路の内開口縁を、上記内部空間側に膨出する断面弧状に形成し、上記横壁を上記内開口縁から上記縦壁の終端に向けて漸次薄肉になるように形成した構成としている。横壁がより一層薄肉状になって外側に折れ曲がりやすくなり、そのため、縮小した側壁の取付口部側が縦壁の始端を通り軸方向に直交する平面よりもより一層外開口側に位置するようになり、底壁内面と取付口部の通路の内開口側との間に生じる空間がより一層小さくなり、潤滑剤の残留量をより一層低減することができる。   Furthermore, if necessary, the inner opening edge of the passage is formed to have an arc-shaped cross section that bulges toward the inner space side, and the horizontal wall is gradually thinned from the inner opening edge toward the end of the vertical wall. The structure is formed as follows. The side wall becomes thinner and bends outward more easily, so that the mounting opening side of the reduced side wall is located closer to the outer opening side than the plane passing through the starting end of the vertical wall and orthogonal to the axial direction. Further, the space generated between the inner surface of the bottom wall and the inner opening side of the passage of the mounting opening is further reduced, and the residual amount of the lubricant can be further reduced.

また、必要に応じ、上記底壁内面を内側に弧状に膨出形成し、上記内部空間の潤滑剤の消費により上記側壁が縮小した際、上記底壁内面を上記通路の内開口縁に当接可能にした構成としている。底壁内面と取付口部の通路の内開口側との間に生じる空間がより一層小さくなり、潤滑剤の残留量をより一層低減することができる。   Further, if necessary, the inner surface of the bottom wall is formed to protrude in an arc shape inward, and when the side wall is reduced due to consumption of the lubricant in the inner space, the inner surface of the bottom wall is brought into contact with the inner opening edge of the passage. The configuration is made possible. The space created between the inner surface of the bottom wall and the inner opening side of the passage of the mounting opening is further reduced, and the residual amount of the lubricant can be further reduced.

更に、必要に応じ、上記側壁に軸方向の伸縮力が作用しない状態での該側壁の山部と山部とのピッチ及び谷部と谷部とのピッチをＰとし、上記底壁の最外側縁を通り軸方向に直交する平面と該底壁の内側面中央を通り軸方向に直交する平面との軸方向幅をＨとして、０．５Ｐ≦Ｈ≦１．０Ｐに設定し、上記底壁内面が上記通路の内開口縁に当接したとき、縮小した側壁の上記取付口部側の６０％以上が上記縦壁の始端を通り軸方向に直交する平面よりも上記外開口側に位置するように形成した構成としている。底壁内面と取付口部の通路の内開口側との間に生じる空間がより一層小さくなり、潤滑剤の残留量をより一層低減することができる。   Further, if necessary, the pitch between the peaks and the valleys and the pitch between the valleys and the valleys of the side wall in a state where no axial stretching force acts on the side wall is P, and the outermost of the bottom wall is The axial width of a plane passing through the edge and orthogonal to the axial direction and a plane passing through the center of the inner surface of the bottom wall and orthogonal to the axial direction is set as H, and 0.5P ≦ H ≦ 1.0P is set. When the inner surface contacts the inner opening edge of the passage, 60% or more of the reduced side wall on the side of the mounting opening is located on the outer opening side with respect to a plane passing through the starting end of the vertical wall and orthogonal to the axial direction. The structure is formed as described above. The space created between the inner surface of the bottom wall and the inner opening side of the passage of the mounting opening is further reduced, and the residual amount of the lubricant can be further reduced.

本発明によれば、潤滑剤が消費され、蛇腹筒状の側壁が徐々に収縮して、収縮しきった際、底壁内面と取付口部の通路の内開口側との間に生じる空間ができるだけ小さくなるので、この空間内に残る潤滑剤の量を極力減らして、潤滑剤の残留量を低減して無駄を防止し省力化を図ることができる。   According to the present invention, when the lubricant is consumed, the bellows-shaped cylindrical side wall gradually contracts, and when the side wall is completely contracted, the space generated between the inner surface of the bottom wall and the inner opening side of the passage of the mounting opening is as small as possible. Since the size is reduced, the amount of the lubricant remaining in this space is reduced as much as possible, and the remaining amount of the lubricant is reduced, thereby preventing waste and saving power.

本発明の実施の形態に係るカートリッジタンクを、側壁に軸方向の伸縮力が作用しない状態で示す断面図である。FIG. 9 is a cross-sectional view showing the cartridge tank according to the embodiment of the present invention in a state where no axial expansion and contraction force acts on the side wall. 本発明の実施の形態に係るカートリッジタンクを、側壁が収縮しきった状態で示す断面図である。FIG. 4 is a cross-sectional view showing the cartridge tank according to the embodiment of the present invention in a state where the side wall has completely contracted. 従来のカートリッジタンクの一例を、側壁に軸方向の伸縮力が作用しない状態で示す断面図である。FIG. 11 is a cross-sectional view illustrating an example of a conventional cartridge tank in a state where no axial expansion and contraction force acts on a side wall. 従来のカートリッジタンクの一例を、側壁が収縮しきった状態で示す断面図である。FIG. 10 is a cross-sectional view illustrating an example of a conventional cartridge tank in a state where a side wall is completely contracted.

以下、添付図面に基づいて本発明の実施の形態に係るカートリッジタンクを説明する。尚、上記と同様のものには同一の符号を付して説明する。
図１及び図２に示すように、本発明の実施の形態に係るカートリッジタンクＴは、グリス等の流動状の図示外の潤滑剤が充填され、図示外の周知の潤滑ポンプに装着される。潤滑ポンプは、カートリッジタンクＴが着脱可能に取り付けられるアダプタ部及びカートリッジタンクＴ内の潤滑剤を吸引して吐出するポンプ部を有している。 Hereinafter, a cartridge tank according to an embodiment of the present invention will be described with reference to the accompanying drawings. Note that the same components as described above are denoted by the same reference numerals and described.
As shown in FIGS. 1 and 2, the cartridge tank T according to the embodiment of the present invention is filled with a fluid (not shown) such as grease and attached to a known lubricant pump (not shown). The lubrication pump has an adapter part to which the cartridge tank T is detachably attached, and a pump part for sucking and discharging the lubricant in the cartridge tank T.

本発明の実施の形態に係るカートリッジタンクＴは、ブロー成形により成形される可撓樹脂製であり、潤滑ポンプに供給するグリス等の流動状の潤滑剤が充填される。樹脂としては、例えば、低密度ポリエチレン等の可撓性のプラスチック材料が用いられる。実施の形態に係るカートリッジタンクＴは、潤滑油の収容量が２００ｍｌ用のものである。収容量は、これに限定されるものではなく、例えば、５００ｍｌ、７００ｍｌ等適宜変更して差し支えない。
カートリッジタンクＴの基本的構成は、山部２と谷部３とが軸方向に交互に形成され軸方向に伸縮可能な蛇腹筒状の側壁１と、側壁１の一端縁１ａに一体に連設される底壁４と、側壁１の他端縁１ｂに一体に連設されるとともに側壁１と同軸の外開口６及び内開口７を有した通路８が形成され上記潤滑ポンプに取り付けられる筒状の取付口部５とを備えて構成されている。 The cartridge tank T according to the embodiment of the present invention is made of a flexible resin formed by blow molding, and is filled with a fluid lubricant such as grease supplied to a lubrication pump. As the resin, for example, a flexible plastic material such as low-density polyethylene is used. The cartridge tank T according to the embodiment has a lubricating oil capacity of 200 ml. The capacity is not limited to this, and may be changed as appropriate, for example, 500 ml or 700 ml.
The basic configuration of the cartridge tank T is such that a peak portion 2 and a valley portion 3 are alternately formed in the axial direction, and are formed in a bellows-shaped cylindrical side wall 1 which can be extended and contracted in the axial direction, and are integrally connected to one end edge 1a of the side wall 1. The bottom wall 4 is formed integrally with the other end 1b of the side wall 1 and a passage 8 having an outer opening 6 and an inner opening 7 which is coaxial with the side wall 1 is formed, and is formed into a cylindrical shape attached to the lubrication pump. And the attachment port 5 of the first embodiment.

取付口部５は、側壁１の他端縁１ｂに連設され側壁１の外径よりも小さい外径を有するリング状部１０と、リング状部１０に連設されるとともに外周に雄ネジ１１が形成されリング状部１０の最大外径と同じ若しくはこれよりも小さい外径を有する雄ネジ部１２とを備えて構成されている。また、リング状部１０の外側には、周方向に沿う溝１３が形成されており、リング状部１０は、溝１３の側壁１側の一側面１３ａを形成する一方リング状部１４，溝１３の雄ネジ部１２側の他側面１３ｂを形成する他方リング状部１５，溝１３の底面１３ｃを形成する中間リング状部１６を備えて構成されている。   The mounting opening 5 is connected to the other end 1b of the side wall 1 and has a ring-shaped portion 10 having an outer diameter smaller than the outer diameter of the side wall 1; And a male screw portion 12 having an outer diameter equal to or smaller than the maximum outer diameter of the ring-shaped portion 10. On the outside of the ring-shaped portion 10, a groove 13 is formed along the circumferential direction. The ring-shaped portion 10 forms one side surface 13a on the side wall 1 side of the groove 13 while the ring-shaped portion 14 and the groove 13 are formed. And the other ring-shaped portion 15 forming the other side surface 13b on the male screw portion 12 side, and the intermediate ring-shaped portion 16 forming the bottom surface 13c of the groove 13.

この取付口部５において、一方リング状部１４の外径Ｄａよりも他方リング状部１５の外径Ｄｂが小さく形成され、Ｄａ＞Ｄｂに設定されている。実施の形態では、取付口部５において、一方リング状部１４の外径をＤａ，他方リング状部１５の外径をＤｂ，中間リング状部１６の外径（溝１３の外径）をＤｃとしたとき、例えば、Ｄａ＝４４ｍｍ，Ｄｂ＝３５．３ｍｍ（雄ネジ外径＝φ３４．９ｍｍ），Ｄｃ＝３１．５ｍｍに設定されている。寸法は、これに限定されるものではない。   In the mounting opening 5, the outer diameter Db of the other ring-shaped portion 15 is formed smaller than the outer diameter Da of the one ring-shaped portion 14, and Da> Db. In the embodiment, the outer diameter of the one ring-shaped portion 14 is Da, the outer diameter of the other ring-shaped portion 15 is Db, and the outer diameter of the intermediate ring-shaped portion 16 (the outer diameter of the groove 13) is Dc. For example, Da = 44 mm, Db = 35.3 mm (external diameter of external thread = φ34.9 mm), and Dc = 31.5 mm. The dimensions are not limited to this.

そして、一方リング状部１４の外側と内開口７との間であって、一方リング状部１４の側壁１側の内部空間Ｅに面する部分は、周方向に沿って切除されており、この一方リング状部１４に側壁１の一端縁１ａから略軸方向に沿って立ち上がる始端２０ａを有した可撓薄肉状の縦壁２０が形成されている。これにより、内部空間Ｅの潤滑剤の消費により側壁１が縮小した際、縮小した側壁１の取付口部５側が、縦壁２０の始端２０ａを通り軸方向に直交する平面Ｓａよりも、外開口６側に位置するように形成される。 A portion between the outside of the one ring-shaped portion 14 and the inner opening 7 and facing the internal space E on the side of the side wall 1 of the one ring-shaped portion 14 is cut off along the circumferential direction. on the other hand that are ring-shaped portion 14 the flexible thin-walled vertical wall 20 having a starting end 20a rising along a substantially axial direction from one end edge 1a of the side wall 1 in it is formed. This ensures that when the side wall 1 has been reduced by the consumption of the lubricant in the interior space E, the mounting opening 5 side is reduced sidewalls 1, than the plane Sa orthogonal to start 20a of the vertical wall 20 axially through the outer It is formed so as to be located on the opening 6 side.

また、一方リング状部１４には、縦壁２０の終端２０ｂに連続するとともに溝１３の側壁１側の一側面１３ａに対応し、略軸方向に直交する方向に延びる横壁２１が形成され、横壁２１の少なくとも縦壁２０の終端２０ｂ側が可撓薄肉状に形成されている。更に、通路８の内開口縁７ａは、内部空間Ｅ側に膨出する断面弧状に形成されており、横壁２１は、内開口縁７ａから縦壁２０の終端２０ｂに向けて漸次薄肉になるように形成されている。   On the other hand, on the one ring-shaped portion 14, a lateral wall 21 which is continuous with the terminal end 20b of the vertical wall 20 and corresponds to one side surface 13a of the side wall 1 of the groove 13 and extends in a direction substantially orthogonal to the axial direction is formed. At least the end 20b side of the vertical wall 20 is formed in a flexible thin shape. Further, the inner opening edge 7a of the passage 8 is formed in an arc-shaped cross section that bulges toward the internal space E, and the horizontal wall 21 becomes thinner gradually from the inner opening edge 7a toward the terminal end 20b of the vertical wall 20. Is formed.

更に、底壁４は、略均一な厚さで形成され、底壁内面４ａは、内側に弧状に膨出形成され、内部空間Ｅの潤滑剤の消費により側壁１が縮小した際、底壁内面４ａが通路８の内開口縁７ａに当接可能に形成されている。詳しくは、側壁１に軸方向の伸縮力が作用しない状態での側壁１の山部２と山部２とのピッチ（谷部３と谷部３とのピッチ）をＰとし、底壁４の最外側縁を通り軸方向に直交する平面Ｓｂと底壁４の底壁内側面４ａの中央Ｓｃとの軸方向幅をＨとして、０．５Ｐ≦Ｈ≦１．０Ｐに設定されている。また、底壁内面４ａが通路８の内開口縁７ａに当接したとき、縮小した側壁１の取付口部５側の６０％以上が縦壁２０の始端２０ａを通り軸方向に直交する平面よりも外開口６側に位置するように形成されている。   Furthermore, the bottom wall 4 is formed with a substantially uniform thickness, the bottom wall inner surface 4a is formed to bulge in an arc shape inside, and when the side wall 1 is reduced due to consumption of the lubricant in the internal space E, the bottom wall inner surface is formed. 4 a is formed so as to be able to contact the inner opening edge 7 a of the passage 8. More specifically, the pitch between the ridges 2 of the side wall 1 (the pitch between the valleys 3 and the valleys 3) in a state where no axial stretching force acts on the side wall 1 is P, Assuming that the axial width between the plane Sb passing through the outermost edge and orthogonal to the axial direction and the center Sc of the bottom wall inner side surface 4a of the bottom wall 4 is H, 0.5P ≦ H ≦ 1.0P is set. When the bottom wall inner surface 4a contacts the inner opening edge 7a of the passage 8, at least 60% of the reduced side wall 1 on the side of the mounting opening 5 passes through the starting end 20a of the vertical wall 20 and is perpendicular to the axial direction. Are also formed so as to be located on the outer opening 6 side.

このようなカートリッジタンクＴを製造するときは、ブロー成形によって成形する。ブロー成形においては、成形型によって側壁１，底壁４及び取付口部５に対応する部位を保持し、取付口部５の外開口６に対応する部分からエアを吹き込むが、この際に、取付口部５に溝１３があるので、中間リング状部１６の直径方向の肉厚が薄くなっており、しかも、一方リング状部１４の外径Ｄａよりも他方リング状部１５の外径Ｄｂを小さく形成（Ｄａ＞Ｄｂ）しているので、他方リング状部１５の直径方向の肉厚も薄くなることから、成形時の蛇腹筒状の側壁１側の成形、及び、縦壁２０の成形においての負担がかからなくなり、また、冷却の時間が速くなることから、冷却の間に材料がダレてしまう事態が抑制され、蛇腹筒状の側壁１の肉厚、及び、縦壁２０の肉厚が均一になりやすく、内面も滑らかに形成することができる。   When manufacturing such a cartridge tank T, it is formed by blow molding. In blow molding, a part corresponding to the side wall 1, the bottom wall 4 and the mounting opening 5 is held by a molding die, and air is blown from a part corresponding to the outer opening 6 of the mounting opening 5, but at this time, the mounting is performed. Since the opening 5 has the groove 13, the thickness of the intermediate ring-shaped part 16 in the diameter direction is thin, and the outer diameter Db of the other ring-shaped part 15 is smaller than the outer diameter Da of the one ring-shaped part 14. Since it is formed small (Da> Db), on the other hand, the thickness in the diameter direction of the ring-shaped portion 15 is also reduced, so that the forming of the bellows-like cylindrical side wall 1 and the forming of the vertical wall 20 at the time of forming are performed. And the cooling time is shortened, so that the material is prevented from dripping during cooling, and the thickness of the bellows-like cylindrical side wall 1 and the thickness of the vertical wall 20 are reduced. Are easily formed, and the inner surface can be formed smoothly.

そして、このカートリッジタンクＴを潤滑ポンプに取り付けるときは、取付口部５の雄ネジ部１２を潤滑ポンプの取付部の雌ネジ部にねじ込んで取り付ける。この状態で、潤滑ポンプを作動させると、カートリッジタンクＴ内の潤滑剤が徐々に消費され、これに従って、蛇腹筒状の側壁１が徐々に収縮し、収縮しきったところで、潤滑剤がなくなったとして、カートリッジタンクＴを新しいものと交換する。この場合、図２に示すように、一方リング状部１４には、側壁１の一端縁１ａから略軸方向に沿って立ち上がる始端２０ａを有した可撓薄肉状の縦壁２０が形成されているので、この縦壁２０及びこれに連続する側壁１の一端縁１ａ近傍の剛性が小さくなって外側に折れ曲がりやすくなっており、そのため、縮小した側壁１の取付口部５側が縦壁２０の始端２０ａを通り軸方向に直交する平面よりも外開口６側に位置するので、底壁内面４ａと取付口部５の通路８の内開口７側との間に生じる空間Ｅａがそれだけ小さくなり、この空間内に残る潤滑剤の量を極力減らすことができ、潤滑剤の残留量を低減して無駄を防止し省力化を図ることができる。 When the cartridge tank T is mounted on the lubrication pump, the male screw 12 of the mounting port 5 is screwed into the female screw of the mounting part of the lubrication pump. In this state, when the lubrication pump is operated, the lubricant in the cartridge tank T is gradually consumed, and accordingly, the bellows-like cylindrical side wall 1 gradually contracts. Replace the cartridge tank T with a new one. In this case, as shown in FIG. 2 , the one ring-shaped portion 14 is formed with a flexible thin-walled vertical wall 20 having a starting end 20 a rising substantially in the axial direction from one end edge 1 a of the side wall 1. Therefore, the rigidity in the vicinity of one end edge 1a of the vertical wall 20 and the side wall 1 continuing to the vertical wall 20 is reduced, so that the vertical wall 20 is easily bent outward. And the space Ea generated between the bottom wall inner surface 4a and the inner opening 7 side of the passage 8 of the mounting opening 5 becomes smaller, and the space Ea becomes smaller. The amount of the lubricant remaining in the inside can be reduced as much as possible, and the amount of the remaining lubricant can be reduced to prevent waste and save power.

また、横壁２１の少なくとも縦壁２０の終端２０ｂ側が可撓薄肉状に形成され、実施の形態では、横壁２１が円弧状の内開口縁７ａから縦壁２０の終端２０ｂに向けて漸次薄肉になるように形成されているので、この横壁２１も剛性が小さくなって外側に折れ曲がりやすくなり、そのため、縮小した側壁１の取付口部５側が縦壁２０の始端２０ａを通り軸方向に直交する平面Ｓａよりもより一層外開口６側に位置するようになり、底壁内面４ａと取付口部５の通路８の内開口７側との間に生じる空間Ｅａがより一層小さくなり、潤滑剤の残留量をより一層低減することができる。   Further, at least the end 20b side of the vertical wall 20 of the horizontal wall 21 is formed in a flexible thin shape, and in the embodiment, the horizontal wall 21 becomes gradually thinner from the arc-shaped inner opening edge 7a toward the end 20b of the vertical wall 20. As a result, the lateral wall 21 also has a low rigidity and is easily bent outward, so that the reduced opening side 5 of the side wall 1 passes through the starting end 20a of the vertical wall 20 and is a plane Sa perpendicular to the axial direction. The space Ea generated between the bottom wall inner surface 4a and the inner opening 7 side of the passage 8 of the mounting opening 5 is further reduced, and the residual amount of the lubricant is further reduced. Can be further reduced.

また、底壁内面４ａが内側に弧状に膨出形成され、内部空間Ｅの潤滑剤の消費により側壁１が縮小した際、底壁内面４ａが通路８の内開口縁７ａに当接するので、特に、縮小した側壁１の取付口部５側の６０％以上が縦壁２０の始端２０ａを通り軸方向に直交する平面Ｓａよりも外開口６側に位置するので、底壁内面４ａと取付口部５の通路８の内開口７側との間に生じる空間Ｅａがより一層小さくなり、潤滑剤の残留量をより一層低減することができる。   Further, the bottom wall inner surface 4a is formed to protrude inward in an arc shape, and the bottom wall inner surface 4a abuts on the inner opening edge 7a of the passage 8 when the side wall 1 is reduced due to consumption of the lubricant in the inner space E. Since 60% or more of the reduced side wall 1 on the side of the mounting opening 5 is located closer to the outer opening 6 than the plane Sa that passes through the starting end 20a of the vertical wall 20 and is orthogonal to the axial direction, the inner surface 4a of the bottom wall and the mounting opening 5 The space Ea generated between the passage 5 and the inner opening 7 side of the passage 8 is further reduced, and the residual amount of the lubricant can be further reduced.

尚、上記実施の形態において、側壁１の蛇腹の山数は適宜に定めて良く、潤滑剤Ｌの容量等により適宜変更して差し支えない。また、カートリッジタンクＴの樹脂の材質も適宜に変更してよいことは勿論である。 Incidentally, Te form smell the above embodiment, the number of ridges of the bellows side wall 1 may be suitably determined, no problem appropriately changed by the capacity or the like of the lubricant L. In addition, it goes without saying that the material of the resin of the cartridge tank T may be appropriately changed.

Ｔ カートリッジタンク
１ 側壁
１ａ 一端縁
１ｂ 他端縁
２ 山部
３ 谷部
４ 底壁
４ａ 底壁内面
５ 取付口部
６ 外開口
７ 内開口
７ａ 内開口縁
８ 通路
１０ リング状部
１１ 雄ネジ
１２ 雄ネジ部
１３ 溝
１３ａ 一側面
１３ｂ 他側面
１３ｃ 底面
１４ 一方リング状部
１５ 他方リング状部
１６ 中間リング状部
２０ 縦壁
２０ａ 始端
２０ｂ 終端
２１ 横壁 T Cartridge tank 1 Side wall 1a One end edge 1b Other end edge 2 Peak 3 Valley 4 Bottom wall 4a Bottom wall inner surface 5 Mounting opening 6 Outer opening 7 Inner opening 7a Inner opening rim 8 Passage 10 Ring-shaped portion 11 Male screw 12 Male Screw portion 13 Groove 13a One side surface 13b Other side surface 13c Bottom surface 14 One ring-shaped portion 15 The other ring-shaped portion 16 Intermediate ring-shaped portion 20 Vertical wall 20a Start end 20b End end 21 Side wall

Claims (3)

潤滑ポンプに取り付けられるとともにブロー成形により成形され内部空間に充填された潤滑剤を該潤滑ポンプに供給する樹脂製のカートリッジタンクにおいて、
山部と谷部とが軸方向に交互に形成され軸方向に伸縮可能な蛇腹筒状の側壁と、該側壁の一端縁に一体に連設される底壁と、上記側壁の他端縁に一体に連設されるとともに該側壁と同軸の外開口及び内開口を有した通路が形成され上記潤滑ポンプに取り付けられる筒状の取付口部とを備え、
該取付口部を、上記側壁の他端縁に連設され該側壁の外径よりも小さい外径を有するリング状部と、該リング状部に連設されるとともに外周に雄ネジが形成され該リング状部の最大外径と同じ若しくはこれよりも小さい外径を有する雄ネジ部とを備えて構成し、
上記リング状部の外側に周方向に沿う溝を形成し、該リング状部を、上記溝の上記側壁側の一側面を形成する一方リング状部，上記溝の上記雄ネジ部側の他側面を形成する他方リング状部，上記溝の底面を形成する中間リング状部を備えて構成し、上記一方リング状部の外径よりも上記他方リング状部の外径を小さく形成し、
上記一方リング状部の外側と内開口との間であって、該一方リング状部の上記側壁側の内部空間に面する部分を周方向に沿って切除し、該一方リング状部に上記側壁の一端縁から略軸方向に沿って立ち上がる始端を有した可撓薄肉状の縦壁を形成し、上記内部空間の潤滑剤の消費により上記側壁が縮小した際、該縮小した側壁の上記取付口部側が上記縦壁の始端を通り軸方向に直交する平面よりも上記外開口側に位置するようにし、
上記一方リング状部の縦壁の終端に連続するとともに上記溝の上記側壁側の一側面に対応した横壁を形成し、該横壁の少なくとも上記縦壁の終端側を可撓薄肉状に形成し、
上記通路の内開口縁を、上記内部空間側に膨出する断面弧状に形成し、上記横壁を上記内開口縁から上記縦壁の終端に向けて漸次薄肉になるように形成したことを特徴とするカートリッジタンク。 In a resin cartridge tank that is attached to the lubrication pump and supplies a lubricant formed by blow molding and filled in the internal space to the lubrication pump,
Crests and valleys are alternately formed in the axial direction, and the bellows-shaped cylindrical side wall is extendable and contractable in the axial direction, a bottom wall integrally connected to one end of the side wall, and the other end of the side wall. A passage having an outer opening and an inner opening coaxially with the side wall and being formed integrally with the side wall, and having a cylindrical mounting port attached to the lubricating pump;
A ring-shaped portion connected to the other end of the side wall and having an outer diameter smaller than the outer diameter of the side wall; and a male screw formed on the outer periphery and connected to the ring-shaped portion. A male screw portion having an outer diameter equal to or smaller than the maximum outer diameter of the ring-shaped portion,
A groove is formed along the circumferential direction outside the ring-shaped portion, and the ring-shaped portion forms one side surface of the groove on the side wall side, while the ring-shaped portion and the other side surface of the groove on the male screw portion side And an intermediate ring-shaped portion forming the bottom surface of the groove. The outer diameter of the other ring-shaped portion is formed smaller than the outer diameter of the one ring-shaped portion.
A portion of the one ring-shaped portion between the outside and the inner opening and facing the inner space on the side wall side of the one ring-shaped portion is cut along the circumferential direction, and the one ring-shaped portion is cut off along the side wall. Forming a flexible thin vertical wall having a starting end rising substantially in the axial direction from one end edge of the side wall, and when the side wall is reduced due to consumption of the lubricant in the internal space, the mounting opening of the reduced side wall is formed. Part side is located on the outer opening side than a plane passing through the starting end of the vertical wall and orthogonal to the axial direction ,
Forming a horizontal wall corresponding to one side surface of the side wall side of the groove while being continuous with the end of the vertical wall of the one ring-shaped portion, forming at least the end side of the vertical wall of the horizontal wall in a flexible thin shape,
The inner opening edge of the passage is formed to have an arc-shaped cross section that bulges toward the inner space side, and the lateral wall is formed so as to become gradually thinner from the inner opening edge toward the end of the vertical wall. Cartridge tank. 上記底壁内面を内側に弧状に膨出形成し、上記内部空間の潤滑剤の消費により上記側壁が縮小した際、上記底壁内面を上記通路の内開口縁に当接可能にしたことを特徴とする請求項１記載のカートリッジタンク。 The inner surface of the bottom wall is formed to protrude in an arc shape inward, and the inner surface of the bottom wall can be brought into contact with the inner opening edge of the passage when the side wall is reduced due to consumption of the lubricant in the inner space. The cartridge tank according to claim 1, wherein 上記側壁に軸方向の伸縮力が作用しない状態での該側壁の山部と山部とのピッチ及び谷部と谷部とのピッチをＰとし、上記底壁の最外側縁を通り軸方向に直交する平面と該底壁の内側面中央との軸方向幅をＨとして、０．５Ｐ≦Ｈ≦１．０Ｐに設定し、上記底壁内面が上記通路の内開口縁に当接したとき、縮小した側壁の上記取付口部側の６０％以上が上記縦壁の始端を通り軸方向に直交する平面よりも上記外開口側に位置するように形成したことを特徴とする請求項２記載のカートリッジタンク。 The pitch between the peaks and the valleys and the pitch between the valleys and the valleys of the side wall in a state where the axial expansion and contraction force does not act on the side wall is defined as P, and passes through the outermost edge of the bottom wall in the axial direction. When the axial width between the orthogonal plane and the center of the inner surface of the bottom wall is H, 0.5P ≦ H ≦ 1.0P is set, and when the bottom wall inner surface contacts the inner opening edge of the passage, 3. The structure according to claim 2, wherein at least 60% of the reduced side wall on the side of the mounting opening is located closer to the outer opening than a plane passing through the starting end of the vertical wall and orthogonal to the axial direction. Cartridge tank.
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