WO2021039742A1

WO2021039742A1 - Tubular body, wiring member, and channel member

Info

Publication number: WO2021039742A1
Application number: PCT/JP2020/031893
Authority: WO
Inventors: 修一飯田; 諭史豊田; 友資吉田
Original assignee: 京セラ株式会社
Priority date: 2019-08-29
Filing date: 2020-08-24
Publication date: 2021-03-04
Also published as: JPWO2021039742A1

Abstract

A tubular body of the present disclosure includes, as the main component thereof, a ceramic material. The tubular body includes through-holes that pass through walls that constitute the tubular body. The through-holes include: first holes that open to the outer surface of the tubular body; and second holes that open to the inner surface of the tubular body. The opening diameter of the first holes is greater than that of the second holes.

Description

Cylindrical body, wiring member and flow path member

The present disclosure relates to a tubular body, a wiring member, and a flow path member.

There is known a wiring member in which a linear member such as an electric wiring and a tube is inserted inside to support or fix the linear member (see Patent Document 1).

JP-A-2017-143851

The tubular body of the present disclosure is a tubular body containing ceramics as a main component, has a through hole penetrating the wall constituting the tubular body, and the through hole opens in the outer surface of the tubular body. It has a first hole to be formed and a second hole to open on the inner surface of the tubular body, and the opening diameter of the first hole is larger than the opening diameter of the second hole.

FIG. 1 is a perspective view showing an example of the wiring member of the present disclosure. FIG. 2 is a side view showing an example of the wiring member of the present disclosure. FIG. 3 is a partially enlarged view showing an example of a cross section taken along the line AA in FIG. FIG. 4 is a partially enlarged view showing an example of a cross section taken along the line AA in FIG. FIG. 5 is a schematic view showing an enlarged cross section of a portion including a protrusion. FIG. 6 is a diagram showing the contour shape of the second hole in the wiring member of the present disclosure. FIG. 7 is a diagram showing the contour shape of the first hole in the wiring member of the present disclosure. FIG. 8 is a schematic view showing an enlarged cross section of a portion including a burr. FIG. 9 is a diagram showing the contour shape of the second hole in the wiring member of the present disclosure. FIG. 10 is a diagram showing the contour shape of the first hole in the wiring member of the present disclosure. FIG. 11 is a perspective view showing an example of the flow path member of the present disclosure. FIG. 12 is a schematic view showing the operation up to the discharge of the liquid in the liquid supply device of the present disclosure. FIG. 13 is a schematic view showing an operation at the time of discharging the liquid in the liquid supply device of the present disclosure. FIG. 14 is a perspective view showing an example of the flow path member of the present disclosure. FIG. 15 is a perspective view showing an example of the plunger of the present disclosure. FIG. 16 is a diagram for explaining the operation of the liquid supply device of the present disclosure. FIG. 17 is a diagram for explaining the operation of the liquid supply device of the present disclosure. FIG. 18 is a diagram for explaining the operation of the liquid supply device of the present disclosure. FIG. 19 is a diagram for explaining the operation of the liquid supply device of the present disclosure.

There are known wiring members that support and fix such linear members by inserting electrical wiring and linear members such as tubes inside. On the other hand, when the wiring member is formed of a tubular body, there is room for further improvement in suppressing the positional fluctuation of the linear member. Therefore, it is expected to realize a tubular body capable of suppressing the positional fluctuation of the linear member.

Hereinafter, the tubular body, the wiring member, and the flow path member of the present disclosure will be described with reference to FIGS. 1 to 10.

It should be noted that the drawings are schematic, and the relationship between the dimensions of each element, the ratio of each element, etc. may differ from the reality. In addition, there may be parts in which the relations and ratios of the dimensions of the drawings are different from each other.

<Wiring member>
FIG. 1 is a perspective view showing an example of the wiring member 10 of the present disclosure, and FIG. 2 is a side view showing an example of the wiring member 10 of the present disclosure. As shown in FIGS. 1 and 2, the wiring member 10 has an insertion hole 15, a closing wall 11, a side wall 17, and a through hole 12. The side wall 17 is an example of a wall. The wiring member 10 is made of a tubular body having an inner surface 13 and an outer surface 14, and has a through hole 12 penetrating a side wall 17 constituting the tubular body.

Here, the number of through holes 12 may be one or more, and is a portion through which a target wiring member (electrical wiring, tube, etc.) is inserted, and can be said to be an insertion hole. In the example of FIG. 1, the wiring member 10 is provided with two through holes 12 (hereinafter, also referred to as through

holes

12a and 12b).

The wiring member 10 made of a tubular body has an insertion hole 15 located at one end and a closing wall 11 located at the other end. That is, the tubular body of the present disclosure includes not only a shape in which both ends are open, but also a shape in which one end is closed and the other end is open.

With respect to the wiring member 10 of the present disclosure, a linear member (not shown) is inserted through the insertion hole 15 and inserted into the space 16 located inside the tubular body and the through hole 12, so that the wiring member 10 is inserted. Supported by. The space 16 is an area surrounded by the inner surface 13 of the side wall 17 and the inner surface 11a of the closed wall 11.

FIG. 3 is a partially enlarged view showing an example of a cross section taken along the line AA in FIG. As shown in FIG. 3, the through holes 12 formed in the wiring member 10 of the present disclosure include a first hole 21 that opens on the outer surface 14 of the tubular body and a second hole 22 that opens on the inner surface 13 of the tubular body. And have.

Here, in the present disclosure, in the through hole 12, the opening diameter D1 of the first hole 21 is larger than the opening diameter D2 of the second hole 22. In the present disclosure, the opening diameter is the longest diameter of the target holes.

When a linear member such as an electric wiring is inserted through the through hole 12 to fix the position of the linear member, when the linear member moves in the through hole 12 (the position changes), the linear member breaks due to fatigue. It may be short-circuited or short-circuited.

Therefore, in the wiring member 10 of the present disclosure, by making the opening diameter D1 of the first hole 21 larger than the opening diameter D2 of the second hole 22, at least the first hole 21 side to the second hole 22 side (opening diameter is large). It is possible to suppress the movement of the linear member from the large outer peripheral side to the inner peripheral side with a small opening diameter). Therefore, in the wiring member 10 of the present disclosure, the position fluctuation of the linear member can be suppressed. The wiring member 10 of the present disclosure is particularly effective when acceleration is applied to the wiring member 10.

Here, the difference between the opening diameter D1 of the first hole 21 and the opening diameter D2 of the second hole 22 may be 0.03 mm or more as long as it satisfies D1> D2.

Further, in the present disclosure, in the through hole 12, the opening area of the first hole 21 may be larger than the opening area of the second hole 22. When such a configuration is satisfied, it is possible to suppress the movement of the linear member from at least the first hole 21 side to the second hole 22 side (from the outer peripheral side having a large opening area to the inner peripheral side having a small opening area). it can. Therefore, in the wiring member 10 of the present disclosure, the position fluctuation of the linear member can be suppressed.

Further, as shown in FIG. 4, the inner wall surface 12c of the through hole 12 is located at a position close to the inner surface 13 of the tubular body or the inner surface 13 of the tubular body (that is, a position adjacent to the second hole 22). May have. When such a configuration is satisfied, the protrusion 23 further suppresses the movement of the linear member from the outer peripheral side to the inner peripheral side.

FIG. 5 is a schematic view showing an enlarged cross section of a portion including the protrusion 23, and can be said to be an enlarged view of the vicinity of the protrusion 23 in FIG. As shown in FIG. 5, the protrusion 23 is in the through hole 12. In the present disclosure, the protrusion 23 is a protrusion 23 that protrudes in a direction orthogonal to the penetration direction of the through hole 12 in a cross-sectional view along the central axis of the through hole 12, and has a height H1 of 0.02 ≦ H1. It means that / D2 ≦ 0.1 is satisfied.

Here, the height H1 starts from the virtual line segment S of the inner wall surface 12c of the through hole 12 in the cross-sectional view, and reaches the portion 12d that finally intersects the protrusion 23 when it is translated in the direction away from the inner wall surface 12c. It is the distance.

FIG. 6 is a diagram showing the contour shape of the second hole 22 in the wiring member of the present disclosure. As shown in FIG. 6, when the width of the protrusion 23 is L1 and the height of the protrusion 23 is H1, the width L1 may be larger than the height H1. The width L1 and height H1 of the protrusion 23 can be evaluated based on, for example, the contour of the second hole 22 and the circumscribed circle CC of the contour.

When such a configuration is satisfied, by increasing the width L1, the area where the linear member is strongly restrained by the inner wall surface 12c of the through hole 12 can be increased. Therefore, in the wiring member 10 of the present disclosure, the position fluctuation of the linear member can be further suppressed. The width L1 of the protrusion 23 is, for example, 500 μm or more.

Further, as shown in FIG. 6, in the wiring member 10 of the present disclosure, the tip portion of the protrusion 23 may have a wavy contour shape. When such a configuration is satisfied, the movement of the linear member from the outer peripheral side to the inner peripheral side is further suppressed.

FIG. 7 is a diagram showing the contour shape of the first hole 21 in the wiring member 10 of the present disclosure, and FIG. 8 is a schematic diagram showing an enlarged cross section of a portion including a burr 24.

As shown in FIGS. 7 and 8, the inner wall surface 12c of the through hole 12 is burred at a position close to the outer surface 14 of the tubular body or the outer surface 14 of the tubular body (that is, a position adjacent to the first hole 21). 24 may have. When such a configuration is satisfied, the burr 24 suppresses the movement of the linear member from the inner peripheral side to the outer peripheral side.

In the present disclosure, the burr 24 protrudes in a direction orthogonal to the penetrating direction of the through hole 12 in a cross-sectional view along the central axis of the through hole 12, and the height H2 is 0.02 ≦ H2. It means that / D1 ≦ 0.1 is satisfied.

Here, as shown in FIG. 8, the height H2 starts from the virtual line segment S of the inner wall surface 12c of the through hole 12 in the cross-sectional view, and when it is translated in the direction away from the inner wall surface 12c, it becomes the burr 24. It is the distance to the last intersecting part 12e.

Further, in the wiring member 10 of the present disclosure, the height H1 of the protrusion 23 on the inner peripheral side may be larger than the height H2 of the burr 24 on the outer peripheral side. When such a configuration is satisfied, the movement of the linear member from the inner peripheral side to the outer peripheral side is further suppressed. The width L2 of the burr 24 is smaller than the width L1 of the protrusion 23, and is, for example, 300 μm or less.

FIG. 9 is a diagram showing the contour shape of the second hole 22 in the wiring member of the present disclosure. As shown in FIG. 9, the contour shape of the second hole 22 is formed by four virtual line segment VLs formed by the contour and the virtual line segment VL when two virtual line segment VL passing through the center of gravity C of the contour and orthogonal to each other are drawn. At least one of the figures S1, S2, S3, and S4 may have a different area from the other figures. For example, in the example of FIG. 9, the figure S2 has a smaller area than the other figures S1, S3, and S4.

When such a configuration is satisfied, at least one of the four figures S1, S2, S3, and S4 is deformed, so that the deformed portion restrains the linear member. Therefore, in the wiring member 10 of the present disclosure, the position fluctuation of the linear member can be further suppressed.

Further, in the present disclosure, as shown in FIG. 9, the contour shape of the second hole 22 may have a contour obtained by deforming a part of an ellipse. When such a configuration is satisfied, this deformed portion restrains the linear member. Therefore, in the wiring member 10 of the present disclosure, the position fluctuation of the linear member can be further suppressed.

FIG. 10 is a diagram showing the contour shape of the first hole 21 in the wiring member of the present disclosure. As shown in FIG. 10, the contour shape of the first hole 21 is formed by four virtual line segment VLs formed by the contour and the virtual line segment VL when two virtual line segment VL passing through the center of gravity C of the contour and orthogonal to each other are drawn. At least one of the figures S1, S2, S3, and S4 may have a different area from the other figures. For example, in the example of FIG. 10, the figures S3 and S4 have a larger area than the other figures S1 and S2.

Further, in the present disclosure, as shown in FIG. 10, the contour shape of the first hole 21 may have a contour obtained by deforming a part of an ellipse. When such a configuration is satisfied, this deformed portion restrains the linear member. Therefore, in the wiring member 10 of the present disclosure, the position fluctuation of the linear member can be further suppressed.

Further, the inner wall surface 12c (see FIG. 3) of the through hole 12 in the wiring member 10 of the present disclosure may have a negative value of skewness Rsk of the roughness curve in the through direction (arrow direction in FIG. 3). That is, the value of such skewness Rsk may be smaller than zero. When such a configuration is satisfied, the movement of the linear member within the inner wall surface 12c is further suppressed.

Here, the lower limit of the value of the skewness Rsk of the roughness curve is, for example, -2, and may be -2 or more and -0.3 or less. When such a configuration is satisfied, the movement of the linear member within the inner wall surface 12c is further suppressed.

Further, the inner wall surface 12c of the through hole 12 may have a surface roughness Ra of a roughness curve in the penetration direction of 0.2 μm or more and 0.4 μm or less. When such a configuration is satisfied, the movement of the linear member within the inner wall surface 12c is further suppressed.

The wiring member 10 in the present disclosure is mainly composed of ceramics. Further, the wiring member 10 in the present disclosure may be made of ceramics. Here, examples of the ceramics include aluminum oxide ceramics, zirconium oxide ceramics, composite ceramics of aluminum oxide and zirconium oxide, silicon nitride ceramics, aluminum nitride ceramics, silicon carbide ceramics and mulite ceramics. ..

When the wiring member 10 contains aluminum oxide ceramic as the main component, the material is cheaper than other ceramics and the workability is excellent, but the characteristics such as durability required for the wiring member 10 are satisfied.

Here, the aluminum oxide ceramics are those containing 70% by mass or more of aluminum oxide out of 100% by mass of all the components constituting the ceramics. The material of the ceramics can be confirmed by the following method. First, a target sample is measured using an X-ray diffractometer (XRD), and identification is performed using a JCPDS card from the obtained 2θ (2θ is a diffraction angle) value. Next, a quantitative analysis of the contained components is performed using an ICP (Inductively Coupled Plasma) emission spectroscopic analyzer (ICP) or a fluorescent X-ray analyzer (XRF). Then, for example, if the presence of aluminum oxide is confirmed by the above identification _{and the content converted from the Al content measured by XRF into aluminum oxide (Al 2} O ₃ ) is 70% by mass or more, the aluminum oxide ceramics Is. It should be noted that other ceramics can be confirmed by the same method.

An example of a method for measuring skewness Rsk and surface roughness Ra on the inner wall surface 12c of the through hole 12 is as follows. First, the measurement direction is either the direction from the first hole 21 side to the second hole 22 side or the direction from the second hole 22 side to the first hole 21 side. Skewness Rsk and surface roughness Ra are measured according to JIS B0601 (2001). The measurement conditions for skewness Rsk and surface roughness Ra are that the cutoff type is Gaussian, the inclination correction uses the least squares straight line correction, the measurement length is 1.0 mm, and the cutoff wavelength is 0.8 mm. The measurement speed is 0.15 mm / sec.

<Flower path member and liquid supply device>
Subsequently, the flow path member and the liquid supply device of the present disclosure will be described with reference to FIGS. 11 to 19. FIG. 11 is a perspective view showing an example of the flow path member 120 of the present disclosure, and is an exploded perspective view of the constituent members of the liquid supply device 100 as a whole.

As shown in FIG. 11, the liquid supply device 100 of the present disclosure includes a ball valve 130, a flow path member 120, and a plunger 110 in this order from the top. The flow path member 120 may also be referred to as a cylinder 120 below.

The ball valve 130 is used to flow or stop the target liquid into the cylinder 120. Specifically, when the ball 131 is separated from the inner wall, the liquid is flowing, and when the ball 131 is in contact with the inner wall, the liquid is stopped. Here, the target liquid is a syrup of a stock solution if the liquid supply device 100 for beverages is for beverages. The valve does not have to be a ball valve as long as it can flow or stop the target liquid into the cylinder 120, and other valves can be used.

The plunger 110 has a cylindrical shape having an outer peripheral surface 111 including a portion sliding with the inner surface 123 of the cylinder 120 and a first surface 112 in contact with the target liquid. The shape of the plunger 110 is not limited to this shape.

The cylinder 120 is made of a tubular body having an inner surface 123 and an outer surface 124, and has a through hole 122 penetrating a wall 121 constituting the tubular body. Here, the number of through holes 122 may be one or more, and is a portion through which the target liquid flows and is discharged, and can be said to be a discharge hole.

The inner diameter of the cylinder 120 is slightly larger than the outer diameter of the plunger 110. Here, "small" is an interval at which the target liquid does not leak from the gap between the inner surface 123 of the cylinder 120 and the outer peripheral surface 111 of the plunger 110 and can slide with low frictional resistance. The portion where at least a part of the inner surface 123 of the cylinder 120 and at least a part of the outer peripheral surface 111 of the plunger 110 slide is a sliding surface. The liquid supply device 100 of the present disclosure includes a cylinder 120 and a plunger 110 made of the flow path member 120 of the present disclosure.

FIG. 12 is a schematic view showing the operation of the liquid supply device 100 of the present disclosure up to the discharge of the liquid. FIG. 13 is a schematic view showing the operation of the liquid supply device 100 of the present disclosure at the time of discharging the liquid.

As shown in FIG. 12, the liquid can be supplied to the cylinder 120 by separating the ball 131 from the inner wall of the ball valve 130 with the plunger 110 inserted in the cylinder 120.

Next, as shown in FIG. 13, the liquid can be discharged (discharged) from the through hole 122 by sliding the plunger 110 in a state where the ball 131 is in contact with the inner wall of the ball valve 130. Here, the sliding direction of the plunger 110 when discharging the liquid is the upward direction in FIG. 13, in other words, the direction approaching the ball valve 130.

Then, after discharging the liquid, the liquid can be supplied to the cylinder 120 by sliding the plunger 110 in the direction away from the ball valve 130 and separating the ball 131 from the inner wall of the ball valve 130. In this way, the operation of the ball 131 and the plunger 110 enables the supply and discharge of the liquid.

Here, in the present disclosure, similarly to the wiring member 10 described above, in the through hole 122, the opening diameter D1 of the first hole on the outer peripheral side (see FIG. 3) is the opening diameter D2 of the second hole on the inner peripheral side (FIG. 3). 3) is larger than. By satisfying such a configuration, turbulence is generated when the liquid flows through the through hole 122, so that foreign substances such as solid fine particles and microorganisms are less likely to adhere to the inner wall surface due to growth and proliferation. As a result, even if the liquid is repeatedly discharged after flowing through the through hole 122 for a long period of time, foreign matter is less accumulated on the inner wall surface, so that high-precision discharge can be performed for a long period of time.

Further, in the present disclosure, in the through hole 122, the opening area of the first hole may be larger than the opening area of the second hole. When such a configuration is satisfied, turbulence is generated when the liquid flows into the through hole 122, so that foreign matter is unlikely to adhere to the inner wall surface of the through hole 122.

Further, the inner wall surface of the through hole 122 may have a protrusion at a position close to the inner surface 123 of the tubular body or the inner surface 123 of the tubular body (that is, a position adjacent to the second hole). When such a configuration is satisfied, turbulent flow is generated at the protrusions when the liquid flows into the through hole 122, so that foreign matter is less likely to adhere to the inner wall surface of the through hole 122.

The protrusion provided in the through hole 122 of the flow path member 120 has the same shape as the protrusion 23 provided in the through hole 12 of the wiring member 10 described above.

That is, the width of the protrusion provided in the through hole 122 may be larger than the height of the protrusion. When such a configuration is satisfied, turbulent flow is generated at the protrusions when the liquid flows into the through hole 122, so that foreign matter is less likely to adhere to the inner wall surface of the through hole 122.

Further, the tip of the protrusion provided in the through hole 122 may have a wavy contour shape. When such a configuration is satisfied, turbulent flow is generated at the protrusions when the liquid flows into the through hole 122, so that foreign matter is less likely to adhere to the inner wall surface of the through hole 122.

Further, the inner wall surface of the through hole 122 may have burrs at a position close to the outer surface 124 of the tubular body or the outer surface 124 of the tubular body (that is, a position adjacent to the first hole). When such a configuration is satisfied, turbulence is generated by burrs when the liquid flows into the through hole 122, so that foreign matter is less likely to adhere to the inner wall surface of the through hole 122.

The burr provided in the through hole 122 of the flow path member 120 has the same shape as the burr 24 provided in the through hole 12 of the wiring member 10 described above.

That is, the height of the protrusion provided in the through hole 122 may be larger than the height of the burr. When such a configuration is satisfied, turbulence is generated when the liquid flows into the through hole 122, so that foreign matter is less likely to adhere to the inner wall surface of the through hole 122.

Further, the contour shape of the first hole located on the outer peripheral side of the through hole 122 is formed when two virtual line segments VL (see FIG. 9) that pass through the center of gravity C (see FIG. 9) of the contour and are orthogonal to each other are drawn. , At least one of the four figures S1, S2, S3, and S4 formed by the contour and the virtual line segment VL may have an area different from that of the other figures.

Similarly, the contour shape of the second hole located on the inner peripheral side of the through hole 122 is the contour and the virtual line segment VL when two virtual line segment VL passing through the center of gravity C of the contour and orthogonal to each other are drawn. At least one of the four figures S1, S2, S3, and S4 formed may have a different area from the other figures.

When such a configuration is satisfied, at least one of the four figures S1, S2, S3, and S4 is deformed, so that when the liquid flows into the through hole 122, turbulence occurs in this deformed portion. Therefore, foreign matter is less likely to adhere to the inner wall surface of the through hole 122.

Further, in the present disclosure, the contour shape of the first hole located on the outer peripheral side of the through hole 122 may have a contour obtained by deforming a part of an ellipse, or the contour shape of the first hole located on the inner peripheral side of the through hole 122 may be formed. The contour shape of the two holes may have a contour obtained by deforming a part of the ellipse. When such a configuration is satisfied, when the liquid flows into the through hole 122, a turbulent flow is generated at this deformed portion, so that foreign matter is less likely to adhere to the inner wall surface of the through hole 122.

Further, the inner wall surface of the through hole 122 in the flow path member 120 (cylinder 120) of the present disclosure may have a negative skewness Rsk value of the roughness curve in the penetration direction. That is, the value of such skewness Rsk may be smaller than zero. When such a configuration is satisfied, when the liquid flows through the through hole 122, there is little adhesion of solid fine particles and microorganisms to the inner wall surface due to growth and proliferation. As a result, even if the liquid is repeatedly discharged after flowing through the through hole 122 for a long period of time, foreign matter is less accumulated on the inner wall surface, so that high-precision discharge can be performed for a long period of time.

Here, the lower limit of the value of the skewness Rsk of the roughness curve is, for example, -2, and may be -2 or more and -0.3 or less. When such a configuration is satisfied, when the liquid flows through the through hole 122, there is less adhesion due to growth and proliferation of solid fine particles and microorganisms.

Further, the inner wall surface of the through hole 122 may have a surface roughness Ra of a roughness curve in the penetration direction of 0.2 μm or more and 0.4 μm or less. When such a structure is satisfied, the surface texture is such that the liquid easily flows, but due to moderate turbulence, there is little adhesion of solid fine particles and microorganisms due to growth and proliferation.

The flow path member 120 in the present disclosure is mainly composed of ceramics. Further, the flow path member 120 in the present disclosure may be made of ceramics. Here, examples of the ceramics include aluminum oxide ceramics, zirconium oxide ceramics, composite ceramics of aluminum oxide and zirconium oxide, silicon nitride ceramics, aluminum nitride ceramics, silicon carbide ceramics and mulite ceramics. ..

When the flow path member 120 contains aluminum oxide ceramic as a main component, the material is cheaper than other ceramics and the workability is excellent, but the characteristics such as corrosion resistance required for the flow path member 120 are satisfied.

Further, the cylindrical plunger 110 that slides on the inner surface 123 of the tubular body that is the flow path member 120 of the present disclosure may also be ceramics or aluminum oxide ceramics.

FIG. 14 is a perspective view showing the flow path member 210 of the present disclosure. As shown in FIG. 14, the flow path member 210 has an inflow hole 215, a closing wall 211, a side wall 217, and a through hole 212. The side wall 217 is an example of a wall. The flow path member 210 is made of a tubular body having an inner surface 213 and an outer surface 214, and has a through hole 212 penetrating the side wall 217 constituting the tubular body.

Here, the number of through holes 212 may be one or more, and is a portion through which the target liquid L flows and is discharged, and can be said to be a discharge hole. In the example of FIG. 14, the flow path member 210 is provided with two through holes 212 (hereinafter, also referred to as through

holes

212a and 212b).

The flow path member 210 made of a tubular body has an inflow hole 215 located at one end and a closing wall 211 located at the other end. A duct (not shown) is connected to the inflow hole 215, and the liquid L is supplied from the conduit to the liquid storage unit 216 via the inflow hole 215. Then, the liquid L supplied to the liquid storage unit 216 is discharged from the through hole 212. The liquid storage portion 216 is an area surrounded by the inner surface 213 of the side wall 217 and the inner surface 211a of the closed wall 211.

Here, in the present disclosure, similarly to the wiring member 10 described above, in the through hole 212, the opening diameter D1 of the first hole on the outer peripheral side (see FIG. 3) is the opening diameter D2 of the second hole on the inner peripheral side (FIG. 3). 3) is larger than. By satisfying such a configuration, turbulence is generated when the liquid L flows through the through hole 212, so that foreign substances such as solid fine particles and microorganisms are less likely to adhere to the inner wall surface due to growth and proliferation. As a result, even if the liquid L is repeatedly discharged after flowing through the through hole 212 for a long period of time, foreign matter is less accumulated on the inner wall surface, so that high-precision discharge can be performed for a long period of time.

Further, in the present disclosure, in the through hole 212, the opening area of the first hole may be larger than the opening area of the second hole. When such a configuration is satisfied, turbulence is generated when the liquid L flows into the through hole 212, so that foreign matter is unlikely to adhere to the inner wall surface of the through hole 212.

Further, the inner wall surface of the through hole 212 may have a protrusion at a position close to the inner surface 213 of the tubular body or the inner surface 213 of the tubular body (that is, a position adjacent to the second hole). When such a configuration is satisfied, when the liquid L flows into the through hole 212, turbulent flow is generated at the protrusions, so that foreign matter is less likely to adhere to the inner wall surface of the through hole 212.

The protrusion provided in the through hole 212 of the flow path member 210 has the same shape as the protrusion 23 provided in the through hole 12 of the wiring member 10 described above.

That is, the width of the protrusion provided in the through hole 212 may be larger than the height of the protrusion. When such a configuration is satisfied, when the liquid L flows into the through hole 212, turbulent flow is generated at the protrusions, so that foreign matter is less likely to adhere to the inner wall surface of the through hole 212.

Further, the tip of the protrusion provided in the through hole 212 may have a wavy contour shape. When such a configuration is satisfied, when the liquid L flows into the through hole 212, turbulent flow is generated at the protrusions, so that foreign matter is less likely to adhere to the inner wall surface of the through hole 212.

Further, the inner wall surface of the through hole 212 may have burrs at a position close to the outer surface 214 of the tubular body or the outer surface 214 of the tubular body (that is, a position adjacent to the first hole). When such a configuration is satisfied, turbulence is generated by burrs when the liquid L flows into the through hole 212, so that foreign matter is less likely to adhere to the inner wall surface of the through hole 212.

The burr provided in the through hole 212 of the flow path member 210 has the same shape as the burr 24 provided in the through hole 12 of the wiring member 10 described above.

That is, the height of the protrusion provided in the through hole 212 may be larger than the height of the burr. When such a configuration is satisfied, turbulence is generated when the liquid L flows into the through hole 212, so that foreign matter is less likely to adhere to the inner wall surface of the through hole 212.

Further, the contour shape of the first hole located on the outer peripheral side of the through hole 212 is formed when two virtual line segments VL (see FIG. 9) that pass through the center of gravity C (see FIG. 9) of the contour and are orthogonal to each other are drawn. , At least one of the four figures S1, S2, S3, and S4 formed by the contour and the virtual line segment VL may have an area different from that of the other figures.

Similarly, the contour shape of the second hole located on the inner peripheral side of the through hole 212 is the contour and the virtual line segment VL when two virtual line segment VL passing through the center of gravity C of the contour and orthogonal to each other are drawn. At least one of the four figures S1, S2, S3, and S4 formed may have a different area from the other figures.

When such a configuration is satisfied, at least one of the four figures S1, S2, S3, and S4 is deformed, so that when the liquid L flows into the through hole 212, turbulence is generated at this deformed portion. As a result, foreign matter is less likely to adhere to the inner wall surface of the through hole 212.

Further, in the present disclosure, the contour shape of the first hole located on the outer peripheral side of the through hole 212 may have a contour obtained by deforming a part of an ellipse, or the first hole located on the inner peripheral side of the through hole 212 may have a contour. The contour shape of the two holes may have a contour obtained by deforming a part of the ellipse. When such a configuration is satisfied, when the liquid L flows into the through hole 212, a turbulent flow is generated at this deformed portion, so that foreign matter is less likely to adhere to the inner wall surface of the through hole 212.

Further, the inner wall surface of the through hole 212 in the flow path member 210 of the present disclosure may have a negative skewness Rsk value of the roughness curve in the penetration direction. That is, the value of such skewness Rsk may be smaller than zero. When such a configuration is satisfied, when the liquid L flows through the through hole 212, there is little adhesion of solid fine particles and microorganisms to the inner wall surface due to growth and proliferation. As a result, even if the liquid L is repeatedly discharged after flowing through the through hole 212 for a long period of time, foreign matter is less accumulated on the inner wall surface, so that high-precision discharge can be performed for a long period of time.

Here, the lower limit of the value of the skewness Rsk of the roughness curve is, for example, -2, and may be -2 or more and -0.3 or less. When such a configuration is satisfied, when the liquid L flows through the through hole 212, adhesion due to growth and proliferation of solid fine particles and microorganisms is less.

Further, the inner wall surface of the through hole 212 may have a surface roughness Ra of a roughness curve in the penetration direction of 0.2 μm or more and 0.4 μm or less. When such a configuration is satisfied, the liquid L has a surface texture in which it easily flows, but due to moderate turbulence, there is little adhesion of solid fine particles and microorganisms due to growth and proliferation.

The flow path member 210 shown in FIG. 14 can also be used alone as a cylinder. Further, the flow path member 210 shown in FIG. 14 can also be used as the liquid supply device 200 by combining with the plunger 220 shown in FIG.

FIG. 15 is a perspective view showing an example of the plunger 220 of the present disclosure. The plunger 220 shown in FIG. 15 has a cylindrical shape and is inserted into the liquid storage portion 216 of the flow path member 210. That is, the outer diameter of the plunger 220 is slightly smaller than the inner diameter of the flow path member 210.

Here, a small amount is an interval at which the target liquid L does not leak from the gap between the inner surface 213 of the flow path member 210 and the outer surface 223 of the plunger 220 and can slide with low frictional resistance. The portion where at least a part of the inner surface 213 of the flow path member 210 and at least a part of the outer surface 223 of the plunger 220 slide is a sliding surface. The plunger 220 inserted through the flow path member 210 rotates internally.

The plunger 220 has one opening 228, the other opening 221 and a side wall 224, and an inflow hole 225. The opening 228 is located on one end face 227 side. The opening 221 is located on the other end face 222 side. The inflow hole 225 is a through hole that penetrates the side wall 224.

A rotating member (not shown) is connected to the opening 228. Such a rotating member rotates the plunger 220 in the rotation direction R (see FIG. 16). The plunger 220 rotates so that the central portion of the inflow hole 225 coincides with the central portion of the through

holes

212a and 212b of the flow path member 210. The inner diameter of the inflow hole 225 in the plunger 220 is preferably larger than the inner diameter of the through

holes

212a and 212b in the flow path member 210.

A conduit (not shown) is connected to the opening 228, and the liquid L (see FIG. 16) is supplied from the conduit to the liquid storage portion 229 via the opening 228. Then, the liquid L supplied to the liquid storage unit 229 is discharged from the through

holes

212a and 212b through the inflow hole 225. The liquid storage unit 229 is a region surrounded by the inner surface 226 of the side wall 224. Further, it is preferable that a check valve or the like (not shown) is arranged in the path of the liquid L so that the liquid L does not flow back from the liquid storage unit 229.

16 to 19 are diagrams for explaining the operation of the liquid supply device 200 of the present disclosure. FIG. 16 shows a state in which the position of the inflow hole 225 of the plunger 220 and the position of the through hole 212a of the flow path member 210 are aligned. In the state shown in FIG. 16, the liquid supply device 200 can discharge the liquid L supplied from the opening 228 of the plunger 220 from the through hole 212a.

FIG. 17 shows a state in which the plunger 220 rotates in the rotation direction R and changes its direction, and the positions of the inflow holes 225 of the plunger 220 and the positions of the through

holes

212a and 212b of the flow path member 210 do not match. There is. In the state shown in FIG. 17, the liquid supply device 200 can stop the discharge of the liquid L supplied from the opening 228 of the plunger 220.

FIG. 18 shows a state in which the position of the inflow hole 225 of the plunger 220 and the position of the through hole 212b of the flow path member 210 are aligned. In the state shown in FIG. 18, the liquid supply device 200 can discharge the liquid L supplied from the opening 228 of the plunger 220 from the through hole 212b.

FIG. 19 shows a state in which the plunger 220 rotates in the rotation direction R and changes its direction, so that the positions of the inflow holes 225 of the plunger 220 and the positions of the through

holes

In the present disclosure, the rotation speed of the plunger 220 may or may not be constant. Further, in the present disclosure, when the inflow hole 225 of the plunger 220 and the through hole 212a or the through hole 212b of the flow path member 210 are aligned with each other, the liquid supply device 200 rotates the plunger 220 for a certain period of time. You may stop it. Further, in the present disclosure, the rotation direction R of the plunger 220 may be continuously or temporarily reversed.

Further, the flow path member 210 in the present disclosure is mainly composed of ceramics. Further, the flow path member 210 in the present disclosure may be made of ceramics. Here, examples of the ceramics include aluminum oxide ceramics, zirconium oxide ceramics, composite ceramics of aluminum oxide and zirconium oxide, silicon nitride ceramics, aluminum nitride ceramics, silicon carbide ceramics and mulite ceramics. ..

When the flow path member 210 contains aluminum oxide ceramic as a main component, the material is cheaper than other ceramics and the workability is excellent, but the characteristics such as corrosion resistance required for the flow path member 210 are satisfied.

Further, the cylindrical plunger 220 that slides on the inner surface 213 of the tubular body that is the flow path member 210 of the present disclosure may also be ceramics or aluminum oxide ceramics.

<Manufacturing method>
Next, a method for manufacturing the tubular body of the present disclosure will be described.

First, prepare aluminum oxide powder, sintering aid, ion-exchanged water, and dispersant. Then, after weighing these in a desired amount, they are mixed and pulverized to obtain a primary slurry. Next, a binder is added to and mixed with the obtained primary slurry to obtain a secondary slurry. Then, the secondary slurry is spray-dried by a spray-drying granule method (spray-drying method) to granulate the granules to obtain granules.

Next, two molded bodies are prepared using the obtained granules. One corresponds to the lower portion of the cross section cut horizontally along the central axis of the through hole, and the other corresponds to the upper portion. Then, in each molded body, a portion to be a through hole is formed by combining the two, and the surface of the portion is further processed so that Rsk becomes negative after firing. Specifically, a process (transfer process) of pressing a mold having a desired surface texture is performed.

After that, after degreasing each molded product, a sintered body is obtained by holding and firing at a maximum temperature of 1500 to 1600 ° C. for 2 to 12 hours in an air atmosphere. Next, by joining by a known method, it is a tubular body containing ceramics as a main component, has a through hole penetrating the wall constituting the tubular body, and has a through hole in the penetrating direction of the inner wall surface of the through hole. A tubular body having a negative skewness Rsk value of the roughness curve can be obtained.

After obtaining the sintered body or joining it into a tubular body, processing may be performed to make the inner surface a sliding surface.

Further, in order to set the skewness Rsk of the roughness curve in the penetration direction of the inner wall surface of the through hole to -2 or more and -0.3 or less, the surface of the portion to be the through hole after firing has the above-mentioned surface texture. It may be processed using a mold. Further, in order to set the surface roughness Ra of the roughness curve in the penetration direction of the inner wall surface of the through hole to 0.2 μm or more and 0.4 μm or less, the surface of the portion to be the through hole after firing is the surface described above. It may be processed using a mold of properties.

Further, in the through hole, in order to make the opening diameter of the first hole that opens on the outer surface of the tubular body larger than the opening diameter of the second hole that opens on the inner surface of the tubular body, the portion that becomes the through hole in the molded body. In forming the above, the portion to be the first hole may be made larger than the portion to be the second hole. Further, when the difference between the opening diameter of the first hole and the opening diameter of the second hole is 0.03 mm or more, the processing dimensions at the time of forming the portion to be the through hole in the molded body may be adjusted.

Further, in order to form a protrusion on the inner wall surface of the through hole at a position close to the inner surface of the tubular body, it is sufficient to perform processing so that the portion to be the protrusion remains when forming the portion to be the through hole in the molded body. ..

Further, one tubular molded body is formed by using the granules obtained above, and a pin-shaped mold is passed through the side wall from the outer surface of the tubular molded body to form a through hole. The tubular body of the present disclosure may be manufactured by firing a tubular molded body having through holes formed therein.

In this case, in order to make the opening diameter of the first hole that opens to the outer surface of the tubular body larger than the opening diameter of the second hole that opens to the inner surface of the tubular body, the shape of the pin-shaped mold is formed. The base end side (outer surface side of the side wall) may be thicker, and the tip end side (inner surface side of the side wall) may be thinner.

In this case, in order to form a protrusion on the inner wall surface of the through hole at a position close to the inner surface or the inner surface of the tubular body, a recess may be arranged at a position corresponding to the protrusion in the pin-shaped mold. Further, in the pin-shaped mold, the friction coefficient (surface roughness) at the position corresponding to the protrusion may be increased.

Further, in this case, in order to make the width of the protrusion formed on the inner wall surface of the through hole at a position close to the inner surface or the inner surface of the tubular body larger than the height of the protrusion, the position corresponding to the protrusion in the pin-shaped mold. The width of the dents arranged in the dents may be made larger than the height of the dents.

In this case, in order to form a burr on the outer surface of the tubular body or a position close to the outer surface on the inner wall surface of the through hole, a dent may be arranged at a position corresponding to the burr in the pin-shaped mold. Further, the friction coefficient (surface roughness) at the position corresponding to the burr in the pin-shaped mold may be increased.

In this case, in order to make the height of the protrusion formed on the inner wall surface of the through hole larger than the height of the burr, the depth of the dent arranged at the position corresponding to the protrusion in the pin-shaped mold is changed to the burr. It may be larger than the depth of the dent arranged at the position corresponding to.

Further, in this case, in order for the contour shape of the first hole or the second hole to have a contour obtained by deforming a part of the ellipse in the through hole, a part of the ellipse is changed to the cross-sectional shape of the pin-shaped mold. It may be in a deformed shape.

Next, an example of the manufacturing method for the cylinder will be described. By press molding using the same granules as described above, a cylindrical molded body is obtained. After that, a desired cutting process may be performed.

Next, a cylinder can be obtained by producing a degreased body by degreasing the obtained molded body and then firing it in an air atmosphere at a maximum temperature of 1500 to 1600 ° C. for 2 to 12 hours. .. After obtaining the sintered body, processing may be performed to make the outer peripheral surface a sliding surface.

The flow path member of the present disclosure described above is a cylinder, and a liquid supply device can be obtained by providing a plunger that reciprocates in the cylinder.

The examples of the present disclosure will be specifically described below, but the present disclosure is not limited to these examples.

Converting calcium carbonate powder to calcium oxide (CaO) to 0.3 parts by mass and magnesium carbonate powder to magnesium oxide (MgO) as a sintering aid to 100 parts by mass of aluminum oxide powder, which is the main component. 0.6 parts by mass and 0.3 parts by mass of silicon oxide powder were added to obtain a mixed powder.

Next, this mixed powder, ion-exchanged water, and a dispersant were put into a ball mill, mixed and pulverized to prepare a primary slurry. Next, as a binder, an aqueous solution of acrylic resin and polyethylene glycol was added to the primary slurry and mixed to prepare a secondary slurry. Next, granules were prepared by spray-drying the secondary slurry using a spray dryer.

Then, the granules were press-molded into a cylindrical shape to obtain a molded product having a diameter of 9.8 mm and a length of 30 mm as a plunger.

Next, in the molded body for the cylinder, the lower part (lower molded body) and the upper part (upper molded body) of the cross section cut in the horizontal direction along the central axis of the through hole were separately press-molded. The lower half of the through hole is located in the lower molded body, and the upper half of the through hole is located in the upper molded body. Then, the surface of the through hole in the molded product was processed so that Rsk became negative after firing. Specifically, the surface texture of the mold of the portion corresponding to the surface of the through hole in the molded body was set to the desired surface texture, and the above-mentioned surface texture was pressed against the molded body (transfer processing).

Next, after degreasing each molded product, the plunger, the upper part of the cylinder, and the lower part of the cylinder, which are mainly composed of aluminum oxide ceramics, are fired by holding and firing at a maximum temperature of 1550 ° C. for 4 hours in an air atmosphere. Obtained. Then, the upper part and the lower part of the cylinder were joined by a known method. The dimensions of the cylinder after joining are 12 mm in outer diameter, 8 mm in inner diameter, and 16 mm in length. The plunger was processed so that the outer diameter was 7.95 mm. The through hole in the cylinder was machined to have a diameter of 1.5 mm after joining. The position of the through hole was such that its center was 4 mm away from one end surface of the cylinder. The opening diameter D1 and the opening diameter D2 of the through hole were set to the same value. By the above method, a plurality of plungers and cylinders having different surface textures of through holes were produced.

Then, Rsk was measured on the surface of the through hole of the manufactured cylinder. This measurement is performed according to JIS B0601 (2001), and the measurement conditions are Gaussian for the cutoff type and least squares straight line correction for the tilt correction, with a measurement length of 1.0 mm and a cutoff wavelength of 0.8 mm. The speed was 0.15 mm / sec.

Next, each plunger and each cylinder were installed in the liquid supply device shown in FIG. 11, the liquid was discharged, and the amount of adhesion was confirmed.

As the liquid, a carbonated drink syrup (stock solution: pH 2.2, solution amount: 100 ml) was used. As for the discharge, the discharge was performed at a rate of 20 times per minute, and this was repeated for 20 hours. To confirm the amount of adhesion, measure the mass (M1) before discharge and the mass (M2) after discharge in the cylinder, and set the rate of change ΔM (%) to {(M2-M1) / M1} × 100 (%). Obtained by.

As a result of confirming the Rsk in the cylinder with 6 types of -3, -2, -1, -0.3, -0.1, 1, the sample having a negative Rsk had a positive Rsk. It was about half the value of ΔM of the sample, and it was confirmed that the amount of adhesion was small because Rsk was negative. Further, it was confirmed that among the samples having a negative Rsk, the ΔM of the sample having an Rsk of -2, -1, and -0.3 was small.

Next, the surface texture of the mold of the portion corresponding to the surface of the through hole in the molded body was changed to prepare a cylinder in which Rsk was -1 and Ra was 0.1 μm, 0.2 μm, 0.4 μm, and 0.6 μm. .. A sample was prepared in the same manner as in Example 1 except that the surface texture of the mold of the portion corresponding to the surface of the through hole in the molded product was different, and the same evaluation as in Example 1 was performed. The sample having Rsk of -1 and Ra of 0.6 is the same as the sample having Rsk of -1 in Example 1.

As a result, it was confirmed that among the four samples, the ΔM of the samples with Ra of 0.2 μm and 0.4 μm was small.

Next, a sample having the same opening diameter D1 and an opening diameter D2 of the through hole, a sample having an opening diameter D1 larger than the opening diameter D2, and a protrusion having an opening diameter D1 larger than the opening diameter D2 and close to the opening diameter D2. A sample having the above was prepared. The Rsk of the surface of the through hole in each was -1, and Ra was 0.4 μm. Then, the same evaluation as in Example 1 was performed. As a result, the sample having the opening diameter D1 larger than the opening diameter D2 had a smaller ΔM than the sample having the same opening diameter D1 and the opening diameter D2. Further, the sample having an opening diameter D1 larger than the opening diameter D2 and having a protrusion at a position close to the opening diameter D2 had a smaller ΔM than the sample having no protrusion.

Note that the present disclosure is not limited to the above-described embodiment, and various changes, improvements, etc. can be made without departing from the gist of the present disclosure. Further, in the present disclosure, components over different embodiments may be appropriately combined.

10 Wiring member (example of tubular body)
12 Through hole 12c Inner wall surface 13 Inner surface 14 Outer surface 17 Side wall (example of wall)
21 1st hole 22 2nd hole 23 Protrusion 24 Bali 120 Flow path member (example of tubular body)
121 Wall 122 Through hole 123 Inner surface 124 Outer surface 210 Flow path member (example of tubular body)
212 Through hole 213 Inner surface 214 Outer surface 217 Side wall (example of wall)
C Center of gravity D1, D2 Opening diameter VL Virtual line segment L1 Width H1, H2 Height S1 to S4 Graphic

Claims

It is a tubular body whose main component is ceramics.
It has a through hole that penetrates the wall that constitutes the tubular body, and has a through hole.
The through hole has a first hole that opens on the outer surface of the tubular body and a second hole that opens on the inner surface of the tubular body.
The opening diameter of the first hole is larger than the opening diameter of the second hole.
Cylindrical body.
The contour of at least one of the first hole and the second hole is a four figure formed by the contour and the virtual line segment when two virtual line segments orthogonal to each other are drawn through the center of gravity of the contour. At least one of them has a different area from the other figures,
The tubular body according to claim 1.
The inner wall surface of the through hole has protrusions on the inner surface or a position close to the inner surface of the tubular body.
The tubular body according to claim 1 or 2.
When the width of the protrusion is L1 and the height of the protrusion is H1, L1 is larger than H1.
The tubular body according to claim 3.
The tip of the protrusion has a wavy contour shape.
The tubular body according to claim 3 or 4.
The inner wall surface of the through hole has a burr on the outer surface of the tubular body or at a position close to the outer surface.
The tubular body according to any one of claims 3 to 5.
The height H1 of the protrusion is larger than the height H2 of the burr.
The tubular body according to claim 6.
The inner wall surface of the through hole has a negative skewness Rsk value of the roughness curve in the penetration direction.
The tubular body according to any one of claims 1 to 7.
The skewness Rsk of the roughness curve is -2 or more and -0.3 or less.
The tubular body according to claim 8.
The inner wall surface of the through hole has a surface roughness Ra of a roughness curve in the penetration direction of 0.2 μm or more and 0.4 μm or less.
The tubular body according to any one of claims 1 to 9.
A wiring member using the tubular body according to any one of claims 1 to 10.
A flow path member using the tubular body according to any one of claims 1 to 10.