【考案の詳細な説明】[Detailed explanation of the idea]
（産業上の利用分野）
本考案は、工作油、作動油、潤滑油、洗浄水、
各種廃水、廃塗料などの過に用いる溝付き過
筒に関する。
（従来の技術）
従来、ガラス繊維などの繊維から成る過筒は
公知である。この場合、粉塵保持容量（DHC）
を向上せしめるため、その円筒体の外側から内側
に至るに従い繊維密度を高くした密度勾配型過
筒も公知である。更にこの密度勾配型過筒の
DHCを向上せしめるため、第６図に示すように、
その外表面に環状の横溝を円筒体の高さ方向に間
隔を存して、その多数本を平行に配設して外側に
おける過表面積を増大した溝付き過筒も公知
である。
（考案が解決しようとする問題点）
本考案は、従来の前記の最もDHCが大きい溝
付き過筒よりも更にDHCの大きい過筒を得
ることを目的とし、過筒を検討していた所、該
過筒は、一般にこれを構成する無数の繊維の多
くは、その筒体の円周方向に配列されていること
に注目した。而して前記従来の溝付き過筒は、
その環状横溝は、円周方向に配列の繊維がDHC
向上に有効に利用されていないことが分つた。
（問題点を解決するための手段）
本考案は、従来の前記溝付き過筒に比し著し
く大きいDHC向上と使用寿命の延長をもたらす
溝付き過筒を提供するもので、周方向に配列さ
れた無数の繊維を備え且つバインダーで結着成形
された筒体の外表面に、該周方向に配列の無数の
繊維に対し交叉する線状又は点状の溝の多数を全
周面に間隔を存して形成して成る。
（実施例）
第１図は、本考案実施の１例の溝付き過筒１
の斜面図であり、該筒１は、従来法に従つて作成
した密度勾配型過筒体１ａの外表面に、その中
心軸に沿い延び且つ両端面に開口する断面コ字状
の直線状の溝２の多数本を筒体１ａの全周面に一
定間隔３を存して平行に配設して成るものであ
る。
かくして、各直線状の溝２は、第２図に明示の
如く、筒体１ａの円周方向に配列の無数の繊維ｂ
に対し交叉して延び、その溝２の両側面には無数
の繊維ｂ間に無数の間隙ｃが露出するものが得ら
れる。従つて、かかる本考案の過筒１を常法に
従つて汚水などの過に使用するときは、その外
表面全周は凹凸形状のため過表面積が増大する
に加え、前記の溝２の両側面に露出の繊維間の無
数の間隙ｃの存在により筒体１ａの多孔性は増大
し、これだけ従来の前記溝付き過筒に比し
DHCの増大をもたらし又これに伴い使用寿命の
増大をもたらす。
第３図は、他の実施例を示し、前記実施例にお
ける垂直線上の溝２に代え、曲線状の溝２に形成
し、その多数本を所定間隔３を存して全周面に配
設したものであり、その作用効果は前記実施例と
同様である。
第４図は、更に他の実施例を示し、溝２を円形
の点状の溝２としその多数個を、その軸方向に沿
い且つその全周面に縦横方向に所定間隔３を存し
て配設したものであり、これによれば、各円形溝
２の円周面における筒体１ａの周方向に配列の繊
維と交叉する両側面に無数の繊維ｂ間の間隙ｃが
露出したものが得られる。かくして、これらの円
形溝２の配設でDHCの向上と使用寿命の延長が
もたらされる。
前記実施例１及び２の線状溝２の寸法は、例え
ば、幅３mm、深さ５〜６mm、溝２間の間隔３の寸
法は例えば９〜10mmとする。前記実施例２の曲線
溝の傾斜角度は、例えば垂直軸に対し略45°傾斜
する傾斜溝とする。
円形溝２の寸法は、例えば孔径５mm、深さ３〜
６mmとし、その孔数は孔数12000〜16000個／m2と
する。
一般に、溝２の断面形状は、Ｕ字状、コ字状、
Ｖ状など任意である。
筒体１ａを構成する繊維の平均繊維径は例えば
6μmとし、密度100〜300Kg／m3の範囲とする。
次に、前記の第１図示の実施例１、第３図示の
実施例２及び第４図示の実施例３及び比較例とし
て、第６図示の従来の溝付き過筒及び溝のない
フラツトな外表面の密度勾配型過筒体を夫々同
じ試験装置に組込み通水量を一定に保持し、水槽
にJIS7種（関東ローム）を投入し、水槽の水が清
澄となつた時の差圧（圧力損失）を測定し、その
差圧になる粉塵投入量をDHCとした。その結果
は、下記表１及び第５図に圧力損失とDHCとの
関係曲線で示す通りである。
(Industrial Application Field) This invention is applicable to machine oil, hydraulic oil, lubricating oil, cleaning water,
This article relates to grooved tubes used to filter various types of waste water, waste paint, etc. (Prior Art) Conventionally, a jacket made of fibers such as glass fibers is known. In this case, the dust holding capacity (DHC)
In order to improve the fiber density, a density gradient type overtube is also known, in which the fiber density increases from the outside to the inside of the cylindrical body. Furthermore, this density gradient type tube
In order to improve DHC, as shown in Figure 6,
A grooved tube is also known in which a large number of annular lateral grooves are arranged in parallel on the outer surface at intervals in the height direction of the cylindrical body to increase the surface area on the outside. (Problems to be Solved by the Invention) The present invention aims to obtain a grooved overtube with an even larger DHC than the conventional grooved overtube with the highest DHC. It has been noted that most of the numerous fibers that constitute the tube are generally arranged in the circumferential direction of the tube. Therefore, the conventional grooved tube has a
Its annular lateral groove has fibers arranged in the circumferential direction of the DHC
It was found that this was not used effectively for improvement. (Means for Solving the Problems) The present invention provides a grooved tube that significantly improves DHC and extends the service life compared to the conventional grooved tube. On the outer surface of a cylindrical body, which has countless fibers arranged in the circumferential direction and is bonded and molded with a binder, a large number of linear or dot-shaped grooves that intersect with the countless fibers arranged in the circumferential direction are arranged at intervals on the entire circumferential surface. It exists and is formed. (Example) Figure 1 shows a grooved overtube 1 of an example of implementing the present invention.
2 is a perspective view of the cylinder 1, in which a straight line with a U-shaped cross section is provided on the outer surface of a density gradient type over cylinder 1a prepared according to a conventional method, extending along its central axis and opening at both end faces. A large number of grooves 2 are arranged in parallel on the entire circumferential surface of the cylindrical body 1a at regular intervals 3. Thus, each linear groove 2 is formed by a number of fibers b arranged in the circumferential direction of the cylindrical body 1a, as clearly shown in FIG.
The grooves 2 extend across each other, and on both sides of the groove 2, countless gaps c are exposed between the countless fibers b. Therefore, when the overtube 1 of the present invention is used for filtration of sewage or the like in accordance with a conventional method, the entire outer surface has an uneven shape, so that the oversurface area increases, and in addition, both sides of the groove 2 are Due to the presence of countless gaps c between the fibers exposed on the surface, the porosity of the cylinder 1a is increased, compared to the conventional grooved tube.
This results in an increase in DHC and a concomitant increase in service life. FIG. 3 shows another embodiment, in which the vertical grooves 2 in the previous embodiment are replaced with curved grooves 2, and a large number of them are arranged on the entire circumferential surface at a predetermined interval 3. The operation and effect are the same as those of the above embodiment. FIG. 4 shows yet another embodiment, in which the grooves 2 are circular dotted grooves 2, and a large number of them are arranged at predetermined intervals 3 in the longitudinal and lateral directions along the axial direction and on the entire circumferential surface. According to this, gaps c between countless fibers b are exposed on both sides of the circumferential surface of each circular groove 2, which intersect with the fibers arranged in the circumferential direction of the cylinder 1a. can get. Thus, the arrangement of these circular grooves 2 results in improved DHC and extended service life. The dimensions of the linear grooves 2 in Examples 1 and 2 are, for example, 3 mm in width and 5 to 6 mm in depth, and the dimensions of the interval 3 between the grooves 2 are, for example, 9 to 10 mm. The inclination angle of the curved groove in the second embodiment is, for example, approximately 45° with respect to the vertical axis. The dimensions of the circular groove 2 are, for example, a hole diameter of 5 mm and a depth of 3 to 5 mm.
The diameter is 6 mm, and the number of holes is 12,000 to 16,000 holes/m 2 . Generally, the cross-sectional shape of the groove 2 is U-shaped, U-shaped,
It can be arbitrary, such as V-shaped. For example, the average fiber diameter of the fibers constituting the cylinder 1a is
6μm, and the density is in the range of 100 to 300Kg/ m3 . Next, as the above-mentioned Example 1 shown in the first drawing, Example 2 shown in the third drawing, Example 3 shown in the fourth drawing, and a comparative example, the conventional grooved overtube shown in the sixth drawing and the flat outer cylinder without a groove will be described. The surface density gradient type overtube was assembled into the same test equipment to keep the water flow constant, and JIS 7 type (Kanto Roam) was put into the water tank, and the differential pressure (pressure loss) when the water in the tank became clear. ) was measured, and the amount of dust input that resulted in the differential pressure was defined as DHC. The results are shown in Table 1 below and the relationship curve between pressure loss and DHC in Figure 5.
【表】
この表及びグラフより、本考案の溝加工によ
り、従来のフラツト型過
筒及び環状横溝付き過筒に比しDHCは著しく
大きくなり従つて又その使用寿命の延長をもたら
すことが分る。
（考案の効果）
このように本考案によるときは、筒体の外表面
に、周方向に配列の無数の繊維に対し交叉する溝
の多数を全周面に間隔を存して形成したので、
過筒の外側の過面積と多孔性が増大し、従来の
環状横溝付き過筒に比し著しく大きいDHCを
有し、使用寿命が延長する等の効果を有する。[Table] From this table and graph, it can be seen that the groove processing of the present invention significantly increases the DHC compared to the conventional flat type tube and annular horizontally grooved tube, and therefore extends its service life. . (Effects of the invention) As described above, according to the present invention, a large number of grooves are formed on the outer surface of the cylindrical body, which intersect with the countless fibers arranged in the circumferential direction, at intervals on the entire circumferential surface.
The outer area and porosity of the outer tube are increased, and the DHC is significantly larger than that of the conventional annular grooved tube, which has the effect of extending the service life.
【図面の簡単な説明】[Brief explanation of the drawing]
第１図は本考案実施の１例の斜面図、第２図は
その１部拡大斜面図、第３図及び第４図は夫々他
の実施例の斜面図、第５図は過特性の比較図、
第６図は従来の溝付き過筒の斜面図を示す。
１……本考案過筒、１ａ……筒体、２……
溝、３……間隔、ｂ……繊維、ｃ……間隙。
Fig. 1 is a slope view of one example of implementing the present invention, Fig. 2 is a partially enlarged slope view of the same, Figs. 3 and 4 are slope views of other embodiments, respectively, and Fig. 5 is a comparison of overcharacteristics. figure,
FIG. 6 shows a perspective view of a conventional grooved tube. 1... Over-tube of the present invention, 1a... Cylindrical body, 2...
Groove, 3... space, b... fiber, c... gap.