Cylindrical body and method for forming cylindrical body

Abstract

To provide means to facilitate access to the inside of a cylindrical body through a simple structure.SOLUTION: A cylindrical body having a plurality of peripheral surface portions arranged in a circumferential direction, comprises a plurality of holding portions that hold the peripheral surface portions so as to be adjacent to each other in a predetermined direction. The peripheral surface portions include engaging portions with opposite ends extending in a predetermined direction. Each of the holding portions has a pair of contact surfaces that can contact the engaging portions. The contact surfaces guide the displacement of the peripheral surface portions in an insertion direction and can restrict the displacement of the peripheral surface portions in the circumferential direction.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a cylindrical body and a method for forming a cylindrical body. [Background technology]

[0002] A toxic target elimination device is known that has a cylindrical portion having an internal flow path through which a fluid passes, and an ultraviolet ray emitting portion having a long tubular shape, and that uses ultraviolet rays to eliminate toxic targets such as viruses (see, for example, Patent Document 1).In such a toxic target elimination device, the ultraviolet ray emitting portion is positioned inside the cylindrical portion (within the flow path) with its longitudinal direction aligned with the axial direction of the cylindrical portion, and irradiates ultraviolet rays directly onto the fluid passing through the flow path. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-057632 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the toxicity target reduction device described in the above-mentioned Patent Document 1, the cylindrical part has a continuous peripheral surface in the circumferential direction so as to form a ring, so that the inside cannot be accessed from the radial direction, and when performing work such as replacing the ultraviolet emitting part, it is necessary to pull out the ultraviolet emitting part along the axial direction of the cylindrical part and take it out. In particular, the longer the cylindrical part is in the axial direction, the larger the working space required, making it difficult to pull out the ultraviolet emitting part, and there is a problem that workability is reduced.

[0005] The present invention was made through intensive research by the inventors in consideration of the above problems, and has an object to provide a means for facilitating access to the inside of a cylindrical body with a simple structure. [Means for solving the problem]

[0006] The cylindrical body of the present invention is a cylindrical body having a plurality of peripheral plate portions arranged in a circumferential direction, and is equipped with a plurality of holding portions which hold the plurality of peripheral plate portions adjacent to each other in a predetermined direction, the peripheral plate portions have engaging portions whose both ends extend in a predetermined direction, the holding portions have a pair of contact surfaces which can come into contact with the engaging portions, and the contact surfaces can guide the displacement of the peripheral plate portions in the insertion direction and regulate the circumferential displacement of the peripheral plate portions.

[0007] The cylindrical body of the present invention is characterized in that the engaging portions at both ends of the peripheral plate portion are arranged in a parallel orientation or inclined outwardly in the circumferential direction relative to each other.

[0008] The cylindrical body of the present invention is characterized in that the engagement portion extends substantially parallel to a normal direction at a circumferential center portion of the peripheral plate portion.

[0009] The cylindrical body of the present invention is also characterized in that the angle formed by the pair of contact surfaces is an obtuse angle.

[0010] The cylindrical body of the present invention is also characterized in that the angle formed by the pair of contact surfaces is a right angle or an acute angle.

[0011] The cylindrical body of the present invention is further characterized in that the retaining portion has a support portion including a pair of the contact surfaces, the support portion being capable of contacting the engaging portion and engaging in a circumferential direction, and an engagement portion being engaged with the support portion and capable of engaging with the peripheral plate portion in the mounting direction.

[0012] The cylindrical body of the present invention is also characterized in that the peripheral plate portion has an inward surface of the cylindrical body that has reflectivity for reflecting electromagnetic waves.

[0013] The cylindrical body of the present invention is characterized in that the electromagnetic waves are ultraviolet rays.

[0014] The method for forming a cylindrical body of the present invention is a method for forming a cylindrical body formed by holding a plurality of peripheral plate portions arranged in the circumferential direction by a holding portion, and is characterized in having the steps of: guiding the mounting direction of the peripheral plate portions by a plurality of support portions arranged in the circumferential direction and forming at least a part of a frame; mounting the peripheral plate portions between the support portions; and fitting an engagement portion into the support portion having the peripheral plate portions arranged on both sides. Effect of the Invention

[0015] According to the present invention, the inside of the cylindrical body can be easily accessed with a simple structure. [Brief description of the drawings]

[0016] [Figure 1] FIG. 2 is a perspective view showing a cylindrical body according to the embodiment. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] 10 is an explanatory diagram showing the contact surfaces of adjacent columnar portions spaced apart from each other; FIG. [Diagram 5] FIG. [Figure 6] FIG. 4 is a cross-sectional view showing a peripheral reflector. [Figure 7] FIG. [Figure 8] 11A to 11C are diagrams showing an example of a procedure for attaching a peripheral reflector between the columnar portions. [Figure 9] FIG. 13 is a diagram showing peripheral reflectors mounted between all of the columns. [Figure 10] 13 is a view showing a cylindrical body with a fitting portion fitted into a columnar portion. FIG. [Figure 11] 13A and 13B are diagrams illustrating other examples of the engagement portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] An embodiment of the cylindrical body of the present invention will be described below with reference to the drawings. Fig. 1 is a perspective view showing a cylindrical body 1 according to this embodiment. Here, the cylindrical body 1 is a member having a structure that amplifies ultraviolet light as electromagnetic waves, and includes a frame 2, a plurality of peripheral reflectors 4 (peripheral plate portions) that are detachable from the frame 2, and a fitting portion 6 that is fitted to the frame 2 to fix the peripheral reflectors 4 and the frame 2.

[0018] The cylindrical body 1 also contains an ultraviolet light source 10 (electromagnetic wave emission source) disposed inside the frame 2 and a peripheral reflector 4. Here, it is described as amplifying ultraviolet light, but it may also reflect and / or amplify electromagnetic waves other than ultraviolet light and / or transmit electromagnetic waves of a specific wavelength range, in which case an electromagnetic wave emission source capable of emitting electromagnetic waves of other wavelengths may be provided in place of the ultraviolet light source 10.

[0019] Fig. 2 is a perspective view showing the arrangement of the frame 2, and Fig. 3 is a cross-sectional view of the frame 2. The frame 2 comprises a pair of frame support members 20 arranged opposite each other in the longitudinal direction of the cylindrical body 1, and a plurality of columnar portions 22 (support portions) that span between the pair of frame support members 20. The multiple columnar portions 22 extend along the axial direction of the cylindrical body 1 and are arranged at approximately equal intervals along the circumferential direction of the cylindrical body 1.

[0020] The frame support member 20 is a member with a substantially circular cross section that forms the axial end of the cylindrical body 1, and has one or more through holes through which fluids such as gas, liquid, and granular materials can pass. The frame support member 20 is also formed with a restricting portion 20a that restricts the radial position of the peripheral reflector 4 attached to the frame 2. The restricting portion 20a can be positioned on the peripheral edge portion and / or outer circumferential surface of the frame support member 20.

[0021] The columnar portions 22 have an elongated shape extending in the axial direction, and in this embodiment, are provided radially outward of the restricting portion 20a, and are provided at three locations along the circumferential direction. That is, the columnar portions 22 are arranged at intervals of approximately 120° on the outer periphery of the end face portion 20. The number of columnar portions 22 is not limited to three, and may be two or four or more.

[0022] 3, the columnar portion 22 has a pair of contact surfaces 24. The pair of contact surfaces 24 form a corner by intersecting one end of each other, and the corner is formed radially inward of the cylindrical body 1, faces the axis of the cylindrical body 1, and forms a ridge line that extends linearly in the axial direction. The angle of the corner, i.e., the angle formed by the pair of contact surfaces 24, can be set to be an obtuse angle.

[0023] In addition, the opposing contact surfaces 24 of the columnar portions 22 that are spaced apart and adjacent in the circumferential direction can be configured to form a surface that is approximately parallel to a line that connects the axis of the cylindrical body 1 and the midpoint of an imaginary line segment connecting the columnar portions 22. In other words, the contact surface 24 forms a surface that is approximately perpendicular to the imaginary line segment connecting the columnar portions 22.

[0024] Specifically, Fig. 4 is an explanatory diagram showing the contact surfaces 24a, 24b of adjacent columnar portions 22 that are spaced apart from each other, and the orientations of the opposing contact surfaces 24a, 24b of adjacent columnar portions 22 are determined so that the contact surface 24a of one columnar portion 22 and the contact surface 24b of the other columnar portion 22 form parallel surfaces as shown in Fig. 4. The opposing contact surfaces 24a, 24b, etc. that are spaced apart from each other in this manner function to guide the peripheral reflector 4 to be attached to the frame 2 along the attachment direction, and to restrict the peripheral reflector 4 from being displaced in the circumferential direction.

[0025] It goes without saying that the angle formed by the pair of contact surfaces 24 of the columnar portion 22 is not limited to an obtuse angle, but may be a right angle or an acute angle. In that case, the adjacent contact surfaces 24a, 24b, etc., spaced apart from each other, are naturally non-parallel to each other.

[0026] The position of the columnar portion 22 with respect to the restricting portion 20a is radially outward. This is to achieve a positional relationship in which the peripheral reflectors 4 are arranged with almost no gap between them, sandwiching the columnar portion 22. As a result, when the peripheral reflectors 4 are arranged to a position restricted by the restricting portion 20a (described later), the peripheral reflectors 4 arranged to sandwich the columnar portion 22 can be displaced radially inward to a position reaching a corner of the columnar portion 22, and can be arranged close enough to butt the ends of the reflectors 12 together.

[0027] Next, the peripheral reflector 4 will be described. Fig. 5 is a perspective view showing the peripheral reflector 4, and Fig. 6 is a cross-sectional view showing the peripheral reflector 4. The peripheral reflector 4 is a plate-like member extending in the longitudinal direction (axial direction) of the cylindrical body 1, and has a reflecting portion 12 whose cross-sectional shape is curved into a substantially arc shape, an engaging portion 14, and the like.

[0028] The curved concave side of the reflecting portion 12 becomes the inner peripheral surface of the cylindrical body 1, and a reflecting surface having high reflectivity to ultraviolet rays is formed on that surface. Therefore, the convex side of the reflecting portion 12 on the peripheral reflecting plate 4 faces radially outward of the cylindrical body 1. The cylindrical body 2 can also be configured such that a separate exterior member is disposed on the outside of the peripheral reflecting plate 4 to surround the frame 2 and the peripheral reflecting plate 4.

[0029] The reflecting surface of the reflecting portion 12 can be formed by providing a reflecting layer or the like that reflects ultraviolet light with a high reflectance, preferably a reflectance of 95% or more, more preferably a reflectance of 97% or more. Such a reflecting layer can be made of a material with a high refractive index, such as one or a combination of materials selected from zirconium oxide, tantalum pentoxide, titanium oxide, hafnium oxide, yttrium oxide, zinc oxide, niobium pentoxide, chromium oxide, aluminum oxide, silicon oxide, and the like.

[0030] The reflective surface of the reflective portion 12 can be formed by an appropriate method, for example, physical vapor deposition methods (PVD methods) such as vacuum deposition, ion plating, and sputtering, chemical vapor deposition methods (CVD methods) such as thermal CVD and plasma CVD, powder coating, solvent coating, printing, electroplating, electroless plating, electrodeposition coating, water-based coating, etc. For coating, ultraviolet reflective paint (for example, paint containing particulate silica (SiO2), alumina (Al2O3), etc.) can be used.

[0031] The reflective surface may be constructed by multi-layering high refractive index materials, where each layer may be made of the same material, different materials, or different materials may be laminated alternately.

[0032] The engagement parts 14 are provided at both ends of the reflecting part 12 and are formed so as to be in close contact, abutment or sliding contact with the contact surface 24. The engagement parts 14 can be provided, for example, by bending the ends of the peripheral reflector 4, with their tips pointing radially outward. The engagement parts 14 may be joined to both ends of the reflecting part 12 by welding, bonding with an adhesive, fastening with a fastening member or the like, or the like.

[0033] Here, the engaging portion 14 can be configured to have a flat portion that can engage with the contact surface 24 in the circumferential direction in order to come into surface contact with the contact surface 24. The flat portion forms a surface that is approximately parallel to the normal line (dotted line a shown in FIG. 6) at the circumferential center of the reflecting portion 12. The distance between the engaging portions 14 is set to be approximately equal to or greater than the distance between the contact surfaces of the adjacent columnar portions 22 described above. Therefore, when the peripheral reflector 4 is attached between the columnar portions 22, the engaging plate portion 14 comes into surface contact or line contact with the contact surface 24.

[0034] The fitting portion 6 has a shape that allows it to be attached to and detached from the columnar portion 22. Fig. 7 is a plan view showing the fitting portion 6, which has a generally U-shaped cross section so as to be fixed to the radially outer side of the columnar portion 22, and is provided at both ends with claw-fitting shaped engagement portions 16 that can engage with each contact surface 24 of the columnar portion 22. The fitting portion 6 can be attached to the columnar portion 22 by partially or entirely bending, so that the interval between the engagement portions 16 can be expanded.

[0035] When the fitting portion 6 is attached to the columnar portion 22 with the peripheral reflectors 4 already arranged on both sides of the columnar portion 22, the fitting portion 6 can function as a holding portion for fixing and holding the peripheral reflectors 4 to the frame 2 together with the columnar portion 22. In addition, the total length of the fitting portion 6 along the axial direction of the cylindrical body 1 is not particularly limited, but here it is set to a length equivalent to the length of the peripheral reflector 4 in the longitudinal direction. Of course, it can also be set to be less than the length of the peripheral reflector 4 in the longitudinal direction.

[0036] Next, an example of a procedure for mounting the peripheral reflector 4 between the columnar parts 22 will be described. Fig. 8 is a diagram showing an example of a procedure for mounting the peripheral reflector 4 between the columnar parts 22. The peripheral reflector 4 is mounted on the frame 2 by inserting the peripheral reflector 4 from the outside of the frame 2 inward in the radial direction as indicated by the arrows in Fig. 8(a). When the peripheral reflector 4 is inserted into the space between the columnar parts 22 as shown in Fig. 8(b), the engagement plate portion 14 comes into surface contact with the contact surface 24, and the peripheral displacement of the peripheral reflector 4 is restricted by the columnar parts 22.

[0037] Using the same method as above, the peripheral reflector 4 is inserted into the spaces between all of the columnar portions 22, as shown in Fig. 9. Next, the fitting portions 6 are fitted into the columnar portions 22. When the engagement portions 14 are in contact with both contact surfaces 24 of the columnar portions 22, as shown in Fig. 10, the fitting portions 6 are fitted into the outside of the columnar portions 22, so that both ends of the fitting portions 6 come into contact with the tips of the engagement portions 14, and engage with the engagement portions 14 in the mounting direction. Thus, the displacement of the peripheral reflector 4 in the mounting direction is restricted by the fitting portions 6.

[0038] Therefore, the peripheral reflector 4 can be attached to the frame 2 to form the cylindrical body 1, with its radial displacement restricted by the end surface portion 20 and the fitting portion 6, and its circumferential displacement restricted by the columnar portion 22.

[0039] As described above, the cylindrical body 1 can be easily formed by simply fitting the fitting portion 6 to the columnar portion 22 after the peripheral reflector 4 is attached to the frame 2. When replacing the ultraviolet light source 10 inside the cylindrical body 1, it is possible to access the inside of the cylindrical body 1 from the radial direction and remove the ultraviolet light source 10 from a direction other than the axial direction, thereby improving workability.

[0040] Furthermore, since the columnar portion 22 is provided with a pair of contact surfaces 24 that intersect at one end, adjacent peripheral reflectors 4 sandwiching the columnar portion 22 can be positioned closely together with almost no gaps between them, so that ultraviolet rays can be reflected over almost the entire inner circumference of the cylindrical body 1, and ultraviolet rays can be reliably amplified inside the cylindrical body 1.

[0041] In addition, the columnar section 22 has a corner where a pair of contact surfaces 24 intersect at one end, and the corner faces inward in the radial direction, so that it is possible to maximize the proportion of the reflecting section 12 to the inner peripheral surface of the cylindrical body 1. In other words, by arranging the peripheral reflectors 4 with almost no gaps between them, it is possible to configure almost the entire area of ​​the inner peripheral surface of the cylindrical body 1 with the reflecting section 12. In contrast, if the cross-sectional shape of the columnar portion 22 is substantially rectangular or the like and the pair of contact surfaces 24 do not intersect at one end, the frame surface of the columnar portion 22 facing the center of the cylindrical body 1 is exposed as the inner peripheral surface of the cylindrical body 1. However, since the columnar portion 22 does not have a UV-reflective reflective surface, the frame surface becomes a non-reflective area for UV rays within the inner peripheral surface of the cylindrical body 1. In order to compensate for the reflectivity of this non-reflective area, it is possible to configure the frame surface by disposing a separate reflector, etc., but by providing the columnar portion 22 having a pair of contact surfaces where the contact surfaces 24 intersect each other at one end, the peripheral reflectors 4 can be arranged with almost no gaps, and the proportion of the reflective portion 12 on the inner peripheral surface of the cylindrical body 1 can be maximized at low cost, which is preferable.

[0042] In the above description, the engaging portions 14 are arranged in a parallel direction, but the present invention is not limited to this, and the engaging portions 14 may be inclined outward so as to expand outward. FIG. 10 is a diagram showing another example of the engaging portion 30. When the engaging portions 30 are shaped to open outward in the circumferential direction, the base end of the engaging portion 30 is formed so as to be elastically deformable. When the engaging portion 30 is arranged between the columnar portions 22 as shown in FIG. 11(a), even if the engaging portion 30 interferes with the columnar portion 22, the base end of the engaging portion 30 can bend and enter between the columnar portions 22. That is, as shown in FIG. 11(b), the base end of the engaging portion 30 bends, and the engaging portion 30 presses the contact surface 24 and slides against the contact surface 24 while the peripheral reflector 4 enters between the engaging portions 30. When the engaging portion 14 faces outward, the shape etc. of the columnar portion 22 may be set so as to have a contact surface 24 corresponding to the engaging portion 14. In other words, the shape etc. of the columnar portion 22 may be set so that the contact surface 24 forms a parallel surface with the engaging portion 14 when the peripheral reflector 4 is attached, and can be in close contact, abutment or sliding contact with the engaging portion 14.

[0043] Furthermore, the cylindrical body 1 of the present invention may be provided with a grip, a handle, a crank, a knob, or the like on the frame support member 20, etc. In this way, for example, when the cylindrical body 1 is housed in a separate exterior part for use, the cylindrical body 1 can be easily handled when housed in the exterior part or taken out from the exterior part, improving convenience. [Explanation of symbols]

[0044] Reference Signs List 1: cylindrical body, 2: frame, 4: peripheral reflector, 6: fitting portion, 10: ultraviolet light source, 14, 30: engagement portion, 20: frame support member, 22: columnar portion, 24: contact surface.

Claims

1. A cylindrical body having a plurality of peripheral plate portions arranged in a circumferential direction, The device includes a plurality of holding portions that hold the plurality of peripheral plate portions adjacent to each other in a predetermined direction, The peripheral plate portion has engagement portions extending from both ends in a predetermined direction, The retaining portion is a cylindrical body having a pair of contact surfaces that can contact the engaging portion, and the contact surfaces guide the displacement of the peripheral plate portion in the insertion direction and regulate the circumferential displacement of the peripheral plate portion.

2. 2. The cylindrical body according to claim 1, wherein the engaging portions at both ends of the peripheral plate portion are arranged in a parallel orientation or inclined outwardly in the circumferential direction relative to each other.

3. 2. The cylindrical body according to claim 1, wherein the engaging portion extends substantially parallel to a normal direction at a circumferential center portion of the peripheral plate portion.

4. 2. The cylindrical body according to claim 1, wherein the angle formed by the pair of contact surfaces is an obtuse angle.

5. 2. The cylindrical body according to claim 1, wherein the angle formed by the pair of contact surfaces is a right angle or an acute angle.

6. The holding portion is a support portion including a pair of the contact surfaces and capable of contacting and engaging with the engaging portion in a circumferential direction; 2. The cylindrical body according to claim 1, further comprising a fitting portion that is fitted to the support portion and can engage with the peripheral plate portion in the mounting direction.

7. 7. The cylindrical body according to claim 1, wherein the peripheral plate portion has a surface facing inward of the cylindrical body that has reflectivity for reflecting electromagnetic waves.

8. 8. The cylindrical body according to claim 7, wherein the electromagnetic wave is an ultraviolet ray.

9. A method for forming a cylindrical body having a plurality of peripheral plate portions arranged in a circumferential direction held by a holding portion, comprising the steps of: a step of guiding the mounting direction of the peripheral plate portion by a plurality of support portions that form at least a part of the frame and are arranged in the peripheral direction; mounting the peripheral plate portion between the support portions; and fitting the fitting portion into the support portion having the peripheral plate portions on both sides.

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