JP2017206267A - Perforated plate for liquid charging nozzle, laminated sheet for liquid charging nozzle, and liquid charging device - Google Patents

Abstract

[Problem] To provide a perforated plate for a liquid filling nozzle, a laminated plate for a liquid filling nozzle, and a liquid filling device that can increase the strength of stress concentration points within the perforated plate while maintaining the aperture ratio of the perforated plate for a liquid filling nozzle. [Solution] The perforated plate for a liquid filling nozzle (11) includes a flat metal substrate (12). A plurality of first through holes (18) are regularly arranged in the center of the metal substrate (12), and a plurality of second through holes (19) are regularly arranged on the periphery of the metal substrate (12). Each of the first through holes (18) is polygonal, and each of the second through holes (19) is either circular or has rounded corners of the polygon that constitutes each first through hole (18). [Selected Figure] Figure 2

Description

  The present invention relates to a porous plate for a liquid filling nozzle, a laminated plate for a liquid filling nozzle, and a liquid filling apparatus.

  In a liquid filling apparatus for filling a container with a liquid such as a beverage, a liquid filling nozzle is provided at a liquid discharge port. In some cases, the liquid filling nozzle is provided with a mesh on the front end side of the discharge port to prevent the liquid inside from dropping when the filling is stopped. As the mesh, a metal net or a perforated plate produced by etching is used, and a plurality of layers are stacked in a liquid filling nozzle via an annular spacer having a frame (Patent Documents 1 and 2).

JP-A-9-99914 Japanese Utility Model Publication No. 5-68899

  The perforated plate produced by the above-described etching process is considered to be more durable than the wire mesh. However, when a perforated plate with a mesh is used repeatedly, stress is repeatedly concentrated on a specific portion (for example, a region adjacent to the annular spacer) of the perforated plate. For this reason, a deformation | transformation and damage may arise in the location where this stress concentrated. On the other hand, in order to increase the strength of the perforated plate, it is conceivable to increase the line width between the through holes of the mesh. However, in this case, since the aperture ratio of the mesh is reduced, the liquid filling efficiency of the container may be reduced. Further, it is conceivable that a plurality of meshes are overlapped and integrated to ensure strength, but in this case, the manufacturing cost increases.

  The present invention has been made in consideration of such points, and is capable of increasing the strength of the stress concentration portion in the porous plate while maintaining the aperture ratio of the porous plate for liquid-filling nozzles. It aims at providing the porous plate for nozzles, the laminated board for liquid filling nozzles, and a liquid filling apparatus.

  A porous plate for a liquid filling nozzle according to an embodiment of the present invention is a porous plate for a liquid filling nozzle, and includes a flat metal substrate, and a plurality of first through holes are provided at the center of the metal substrate. A plurality of second through holes are regularly arranged on the peripheral side of the metal substrate, and each first through hole has a polygonal shape, and each second through hole has a shape. Is characterized in that it is a shape obtained by rounding the corners of the polygon that constitutes the first through hole, or a circular shape.

  In the perforated plate for a liquid filling nozzle, the first through hole may be a hexagonal shape, and the plurality of first through holes may be arranged in a honeycomb shape.

  In the perforated plate for a liquid filling nozzle, the radius of curvature of the corner portion of the second through hole may be 20% or more of the length of the side of the polygon that forms the first through hole.

  In the perforated plate for a liquid filling nozzle, the metal substrate has a substantially rectangular shape, and a region where the second through hole is formed is not less than 10% and not more than 30% of the width of the metal substrate from the side of the metal substrate. It may be provided in the region.

  In the perforated plate for a liquid filling nozzle, the metal substrate has a substantially rectangular shape, and a region where the second through-hole is formed is the widest in the vicinity of the center of the side of the metal substrate, and at the end of the side. It may be gradually narrower as you head.

  A laminated plate for a liquid filling nozzle according to an embodiment of the present invention includes the porous plate for a liquid filling nozzle and an annular spacer that is laminated on the porous plate for a liquid filling nozzle and has a frame and an opening. It is characterized by.

  A liquid filling apparatus according to an embodiment of the present invention is a liquid filling apparatus including a liquid filling nozzle, a metering cylinder, and a connection pipe connecting the liquid filling nozzle and the metering cylinder. Has a cylindrical nozzle body and a discharge port provided at the tip of the cylindrical nozzle body, and the liquid-filled nozzle laminate is mounted in the vicinity of the discharge port.

  ADVANTAGE OF THE INVENTION According to this invention, the intensity | strength of the stress concentration location in a perforated panel can be raised, maintaining the aperture ratio of the perforated panel for liquid filling nozzles.

1A and 1B are overall plan views showing a perforated plate for a liquid filling nozzle according to an embodiment of the present invention. FIG. 2 is a partially enlarged plan view showing a perforated plate for a liquid-filled nozzle according to an embodiment of the present invention (part II enlarged view of FIG. 1). FIG. 3 is a partially enlarged cross-sectional view showing a perforated plate for a liquid filling nozzle according to an embodiment of the present invention (cross-sectional view taken along line III-III in FIG. 1). FIG. 4 is an overall plan view showing a perforated plate for a liquid filling nozzle according to a modification. FIG. 5 is an overall plan view showing a liquid-filled nozzle laminate according to an embodiment of the present invention. 6 is a partially enlarged cross-sectional view taken along the line VI-VI of the liquid-filled nozzle laminate shown in FIG. 7A and 7B are respectively a partially enlarged plan view and a side view of the VIIA portion of the laminated plate for a liquid filling nozzle shown in FIG. FIG. 8 is a diagram showing a method for manufacturing a laminated plate for a liquid filling nozzle according to an embodiment of the present invention. FIG. 9 is a diagram showing a liquid filling nozzle and a liquid filling apparatus using a laminated plate for a liquid filling nozzle according to an embodiment of the present invention.

A. The following liquid filling nozzle perforated plate, with reference to FIGS. 1 to 4, description will be given of a configuration of a liquid filling nozzle for perforated plate according to an embodiment of the present invention. In the following drawings, the same portions are denoted by the same reference numerals, and some detailed description may be omitted.

  First, the structure of the porous plate for liquid filling nozzles according to the present embodiment will be described. 1-4 is a figure which shows an example of the porous board for liquid filling nozzles by this Embodiment. 1 (a) and 1 (b) are plan views of the entire porous plate 11 for a liquid filling nozzle according to the present embodiment, respectively, and FIG. 2 is a partially enlarged view of the porous plate 11 for a liquid filling nozzle shown in FIG. It is a top view. 3 is a partially enlarged cross-sectional view taken along the line III-III of the liquid-filled nozzle porous plate 11 shown in FIG. 1, and FIG. 4 is a partial enlarged plan view of the liquid-filled nozzle porous plate 11 according to a modification.

  As shown in FIGS. 1 to 3, the porous plate 11 for liquid filling nozzles (hereinafter also referred to as the porous plate 11) includes a mesh-like and flat metal substrate 12.

  As shown in FIG. 1A, the metal substrate 12 has a substantially rectangular shape, more specifically, a square shape with rounded corners. Two orthogonal sides forming the outer shape of the metal substrate 12 extend along the X direction and the Y direction in FIG.

  In the metal substrate 12, a large number of through holes 18, 19 (see FIG. 2) are arranged over substantially the entire area. A first through hole region 16 having a high aperture ratio is formed on the center side in the planar direction of the metal substrate 12, and a second through hole region 17 having a low aperture ratio is formed on the peripheral side in the plane direction of the metal substrate 12. Yes. Here, the aperture ratio refers to the area of the opening portion (through holes 18 and 19) occupying the entire first through hole region 16 (second through hole region 17).

  In the first through-hole region 16, a plurality of first through-holes 18 (see FIG. 2) are regularly arranged throughout. A plurality of second through holes 19 (see FIG. 2) are regularly arranged in the second through hole region 17. The boundary L1 between the first through-hole region 16 and the second through-hole region 17 is a continuous connection of the second through-holes 19 located on the innermost side in the second through-hole region 17. Yes (see FIG. 2).

  In FIG. 1A, the width w <b> 2 of the second through hole region 17 is substantially the same along the outer periphery of the metal substrate 12. The second through-hole region 17 is preferably provided in a region from 10% to 30% of the width w1 of the metal substrate 12 from the side of the metal substrate 12 (0.1w1 ≦ w2 ≦ 0.3w1). In general, stress tends to concentrate on the outer periphery of the metal substrate 12. Therefore, by providing the second through-hole region 17 in the above range of the outer peripheral portion of the metal substrate 12, the strength of the portion where the stress is easily concentrated in the porous plate 11 is emphasized while maintaining the aperture ratio of the porous plate 11. Can be enhanced.

  FIG. 1B shows a perforated plate 11 according to a modification. In FIG. 1B, the second through-hole region 17 is the widest in the vicinity of the center of the side of the metal substrate 12, and gradually becomes narrower toward the end of the side of the metal substrate 12. In this case, the width w3 of the second through-hole region 17 at the center of the side of the metal substrate 12 is preferably a region that is not less than 10% and not more than 30% of the width w1 of the metal substrate 12 (0.1w1 ≦ w3 ≦ 0). .3w1). As described above, stress tends to concentrate on the outer periphery of the metal substrate 12, and the stress tends to concentrate more as it goes to the center of the side of the metal substrate 12. For this reason, the second through-hole region 17 is made wider at the center of the side of the metal substrate 12. Specifically, the second through-hole region 17 has a stress value of 50 at a location where the maximum stress is applied (location corresponding to the point P1) when it is assumed that all of the metal substrate 12 is the first through-hole region 16. It is preferable to provide in the range which becomes more than%. Thereby, the intensity | strength of the stress concentration location in the perforated panel 11 can be raised more effectively.

  Next, the configuration of the first through hole 18 and the second through hole 19 will be described with reference to FIG.

  As shown in FIG. 2, the shape of each first through-hole 18 is a regular hexagonal shape and has substantially the same size. The plurality of first through holes 18 are arranged in a so-called honeycomb shape. That is, around the first through hole 18, six first through holes 18 are arranged adjacent to each side of the first through hole 18. By arranging the first through holes 18 in a honeycomb shape, it is possible to increase the strength of the entire first through hole region 16 while maintaining a high aperture ratio of the first through hole region 16.

  A linear first mesh line 28 is formed between the first through holes 18 adjacent to each other. The width w4 of the first mesh line 28 is preferably 10% to 50% of the length d1 of each side of the first through hole 18. The width w4 of the first mesh line 28 can be appropriately set in consideration of the viscosity of the liquid to be filled, the filling speed, etc., for example, 0.1 mm or more and 0.5 mm or less, preferably 0.15 mm or more. 0.3 mm or less. By setting the width w4 of the first mesh line 28 in the above range, the strength in the porous plate 11 can be increased while maintaining the aperture ratio of the porous plate 11. In addition, the shape of the 1st through-hole 18 is good also as polygonal shapes, such as a square and a regular triangle other than a regular hexagon.

  The shape of each second through hole 19 is a regular hexagonal shape with rounded corners, and has almost the same size. The shape of the second through hole 19 is formed by uniformly rounding six regular hexagonal corners constituting the first through hole 18. The distance d3 between the opposing sides of the second through hole 19 is the same as the distance d2 between the opposing sides of the first through hole 18. The distances d2 and d3 can be appropriately set in consideration of the viscosity of the liquid to be filled, the filling speed, and the like, for example, 0.3 mm or more and 2.5 mm or less, preferably 0.5 mm or more and 1. 5 mm or less.

  The plurality of second through holes 19 are arranged in a honeycomb shape. That is, around the second through hole 19, six second through holes 19 are arranged adjacent to each side of the second through hole 19. Thereby, the intensity | strength of the 2nd through-hole area | region 17 can be raised, maintaining the aperture ratio of the 2nd through-hole area | region 17 high.

  A second mesh line 29 is formed between the second through holes 19 adjacent to each other. The width of the second mesh line 29 is narrowest at the longitudinal center portion 29a (width w5) and gradually becomes wider toward the longitudinal end portion 29b. The width w5 of the longitudinal center portion 29a of the second mesh line 29 is substantially the same as the width w4 of the first mesh line 28.

  The radius of curvature r1 of the corner of the second through hole 19 is preferably 20% or more of the length d1 of the polygonal side constituting the first through hole 18 (0.2d1 ≦ r1). Thereby, the width | variety of the 2nd mesh line 29 in the longitudinal direction edge part 29b can be enlarged, and the intensity | strength of the 2nd through-hole area | region 17 can be raised. The corner of the first through hole 18 may be rounded in the same manner. In this case, the radius of curvature r1 of the corner of the second through hole 19 is larger than the radius of curvature r2 of the corner of the first through hole 18. Is also big.

  When the shape of the 1st through-hole 18 is polygonal shapes, such as a square and a regular triangle, the shape of the 2nd through-hole 19 consists of a shape which rounded corners, such as the said square and a regular triangle. The arrangement of the first through holes 18 and the arrangement of the second through holes 19 are not limited to the honeycomb shape, and may be a pattern such as a lattice shape or a staggered shape.

  In addition, in FIG. 2, the straight line L2 has shown the position of the inner periphery of the cyclic | annular spacer 21 mentioned later (refer FIG. 7).

  As shown in the cross-sectional view of FIG. 3, the first through hole 18 and the second through hole 19 respectively penetrate the metal substrate 12 in the thickness direction (direction perpendicular to the plane of the metal substrate 12, Z direction). Moreover, the 1st through-hole 18 and the 2nd through-hole 19 are each formed by etching the metal substrate 12 from both surfaces. Therefore, a convex portion T is formed on the inner wall of the metal substrate 12 so as to protrude circumferentially toward the center of the first through hole 18 and the second through hole 19. Thereby, the liquid can be more effectively held by the porous plate 11 when the filling of the liquid is stopped.

  As described above, the first through-hole region 16 having a high aperture ratio is disposed on the center side of the metal substrate 12, and the second through-hole having a lower aperture ratio than the first through-hole region 16 is disposed on the peripheral side of the metal substrate 12. Area 17 is arranged. Thereby, the intensity | strength of the 2nd through-hole area | region 17 can be raised relatively, and the intensity | strength of the location where stress concentrates easily in the perforated panel 11 can be raised. On the other hand, since the opening ratio of the first through-hole region 16 is kept relatively high, the filling productivity is not greatly reduced when filling the liquid.

  FIG. 4 shows a modification of the perforated plate 11. In FIG. 4, the shape of each 2nd through-hole 19 is circular shape unlike the form shown in FIGS. In this case, since the width of the second mesh line 29 at the longitudinal end portion 29b can be increased, the strength of the second through-hole region 17 can be further increased. The diameter d3 of the second through hole 19 having a circular shape is the same as the distance d2 between the opposing sides of the first through hole 18.

B. Liquid filling nozzles laminates Next, the configuration of the liquid filling nozzle laminates according to the present embodiment. 5 and 6 are explanatory views showing an example of a liquid-filled nozzle laminate according to the present embodiment. FIG. 5 is an overall plan view of the liquid-filled nozzle laminate 10 according to the present embodiment, and FIG. 6 is a partially enlarged cross-sectional view taken along the line VI-VI of the liquid-filled nozzle laminate 10 shown in FIG. .

  As shown in FIGS. 5 and 6, the liquid-filled nozzle laminate 10 includes the above-described porous plate 11 and an annular spacer 21 laminated on the porous plate 11. Among these, the annular spacer 21 includes a frame body 22 and an opening 23 surrounded by the frame body 22. In the liquid-filled nozzle laminate 10, the second through hole 19 located at the periphery of the perforated plate 11 is also formed in a region overlapping the frame 22 of the annular spacer 21.

  As shown in FIG. 5, the annular spacer 21 has a square shape with rounded corners, and two orthogonal sides forming these outer shapes extend along the X direction and the Y direction in FIG. 5. The perforated plate 11 and the annular spacer 21 have substantially the same size, and are laminated so that their outer shapes match. On the other hand, the second through-hole region 17 of the perforated plate 11 is separated into a region covered with the annular spacer 21 and a region located inside the annular spacer 21.

  As shown in the cross-sectional view of FIG. 6, in the present embodiment, since the two porous plates 11 are laminated so that the through holes 18 and 19 overlap each other, the convex portion T is connected to each of the connected through holes 18, Two places are provided inside 19.

  FIG. 7A and FIG. 7B are respectively a partially enlarged plan view of the VIIA part of the liquid-filled nozzle laminate 10 shown in FIG. 5, and the VIIA part outside the liquid-filled nozzle laminate 10 (FIG. 5). It is the side view seen from the (VIIB direction). In FIG. 7A, a shaded region is a region where the perforated plate 11 and the frame body 22 of the annular spacer 21 overlap in plan view. L <b> 2 indicates the position of the inner peripheral edge of the annular spacer 21. Moreover, although the pattern of the 2nd through-hole 19 does not exist in the outer side of the external shape L3 of the frame 22 (annular spacer 21), it has illustrated for description.

  The patterns of the through holes 18 and 19 are formed in the perforated plate 11 in a region overlapping with the frame 22 of the annular spacer 21 (hereinafter referred to as the frame region 14) and a region overlapping with the opening 23 of the annular spacer 21 (hereinafter referred to as opening). (Referred to as region 15). In this case, the second through hole 19 is also formed in the frame region 14 of the porous plate 11, and the second through hole 19 overlaps the frame 22 when the porous plate 11 and the annular spacer 21 are laminated. ing. Therefore, it is not necessary to form the through holes 18 and 19 located at the outer edge portion of the opening region 15 along the shape of the frame 22 as in the case where the conventional through hole is not formed in the frame region 14. Therefore, even if the porous plate 11 is manufactured by etching, the through holes 18 and 19 are not formed smaller than the design or do not penetrate, and a laminated plate for a liquid-filled nozzle having a low flow resistance is obtained. be able to.

  Examples of the material of the metal substrate 12 of the porous plate 11 according to the present embodiment include austenitic, ferritic, and martensitic stainless steel, titanium, titanium alloy, nickel, nickel alloy, and the like.

  Examples of the material of the annular spacer 21 include austenitic, ferritic, and martensitic stainless steel, titanium, titanium alloy, nickel, nickel alloy, and the like.

  The thickness of the porous plate 11 is, for example, from 0.1 mm to 1.0 mm, and preferably from 0.2 mm to 0.6 mm. Moreover, the thickness of the annular spacer 21 is 0.1 mm or more and 1.0 mm or less, for example, Preferably, it is 0.3 mm or more and 0.6 mm or less.

  The size of the perforated plate 11 and the annular spacer 21 can be, for example, a length of one side of 30 mm or more and 80 mm or less, depending on the shape of the liquid filling nozzle to be used. Other rectangles, polygons, circles, ellipses, etc. may be used depending on the shape of the liquid filling nozzle.

  5 and 6, two perforated plates 11 are laminated, and one annular spacer 21 is laminated on each of the upper and lower sides. However, the laminated plate 10 for a liquid filling nozzle according to the present embodiment is limited to this. Instead, the annular spacer 21 may be laminated above or below one or more perforated plates 11, or may be laminated only on one of the upper side or the lower side of the perforated plate 11, It may be laminated between the perforated plates 11.

  Next, a portion where the porous plate 11 and the frame body 22 of the annular spacer 21 overlap will be described. As shown in FIG. 7A, the liquid filling nozzle laminate 10 is configured such that the second through hole 19 of the porous plate 11 enters the width of the frame 22 of the annular spacer 21. That is, the width w6 of the frame body 22 is larger than the distance d3 between the opposing sides of the second through hole 19, and the porous plate 11 and the annular spacer 21 have the second through hole 19 in the width of the frame body 22. Are stacked.

  Thus, since the laminated plate 10 for liquid filling nozzles by this Embodiment is comprised so that the 2nd through-hole 19 of the porous plate 11 may enter in the width | variety of the frame 22 of the annular spacer 21, the porous plate 11 The metal substrate 12 around the second through hole 19 can be joined to the frame 22 of the annular spacer 21. Therefore, the bonding strength between the perforated plate 11 and the annular spacer 21 can be increased, and a laminated plate for a liquid-filled nozzle that is more durable can be obtained. In addition, when the frame is rectangular, it is preferable in terms of strength to form at least one through hole on each side.

  The width w6 of the frame 22 of the annular spacer 21 can be set to, for example, 0.6 mm or more and 3.0 mm or less according to the shape of the liquid filling nozzle 60 (see FIG. 9) to be used.

C. Method for Producing Liquid Filled Nozzle Laminate Next, a method for producing a liquid filled nozzle laminate according to this embodiment will be described.

  In the present embodiment, a porous plate sheet 30 in which a plurality of porous plates 11 are provided in a plane and an annular spacer sheet 40 in which a plurality of annular spacers 21 are provided in a plane are laminated. The plate 11 and the annular spacer 21 are separated into individual pieces, and the laminated plate 10 for a liquid filling nozzle is produced.

  That is, first, as shown in FIG. 8A, a flat metal substrate sheet 10A is prepared. As will be described later, the metal substrate sheet 10A is joined to an annular spacer sheet 40 in which a plurality of openings 23 of the annular spacer 21 are provided on a flat metal base material, and then cut for each opening 23. Thus, the plurality of laminated plates 10 for liquid filling nozzles have a size that can be produced by attaching them in multiple directions. The material of the metal substrate sheet 10A is the same as that of the metal substrate 12 described above.

  Next, as shown in FIG. 8B, a plurality of first through holes 18 and a plurality of second through holes 19 are formed in the metal substrate sheet 10 </ b> A, and a perforated plate sheet 30 is produced. The perforated plate sheet 30 is a multi-faced body of the perforated plate 11, and the first through hole 18 and the second through hole 19 are formed on the entire surface excluding the outer periphery of the perforated plate sheet 30. In this case, the first through hole 18 is formed in a region corresponding to the center of each porous plate 11 (first through hole region 16), and the second through hole 19 is a region corresponding to the peripheral edge of each porous plate 11 ( The second through-hole region 17) is formed.

  The first through hole 18 and the second through hole 19 are formed by performing wet etching or dry etching on the metal substrate sheet 10A from the front and back sides. The etching solution at this time can be appropriately selected according to the material of the metal substrate sheet 10A to be used. For example, when stainless steel is used as the metal substrate sheet 10A, a ferric chloride aqueous solution is usually used and sprayed. It can be performed by etching.

  As shown in FIG. 8B, an alignment hole 33 used when laminating the porous plate sheet 30 and the annular spacer 21 may be formed on the outer periphery of the porous plate sheet 30. Here, a plurality of alignment hole portions 33 are provided at the four corners of the perforated plate sheet 30 and the four sides of the outer periphery.

  Next, as schematically shown in FIG. 8C, two perforated plate sheets 30 are stacked and joined. This joining can be performed by sintering joining, diffusion joining, arc welding, resistance welding, brazing, or the like.

  Subsequently, as shown in FIG. 8 (d), an annular spacer sheet 40 that is a multi-faced body of the annular spacer 21 is prepared, and laminated and bonded to the front and back surfaces of the perforated plate sheet 30, thereby forming a liquid filling nozzle. A laminated board sheet 50 is obtained. The annular spacer sheet 40 is a multi-faced body of the annular spacer 21 in which a plurality of annular spacers 21 are provided in a plane, and the frame body connecting portion 41 is provided with a plurality of openings 23 of the annular spacer 21. When the hole 33 for alignment is formed in the porous plate sheet 30, the hole 33 for alignment is also formed in the annular spacer sheet 40 at a position overlapping with the porous plate sheet 30. The

  The perforated plate sheet 30 and the annular spacer sheet 40 can be joined by the same method as that for joining the perforated plate sheets 30 described above. Here, thermal deformation (particularly elongation deformation) is likely to occur in the step of bonding over a long period of time in a high temperature atmosphere such as sintering bonding or diffusion bonding. Therefore, the alignment hole 33 is provided in an oval shape near the center of each side, or the alignment hole 33 of the porous plate sheet 30 is larger than the alignment hole 33 of the annular spacer sheet 40. By forming so as to be, it is possible to laminate while suppressing the influence of thermal deformation.

  Next, as shown in FIG.8 (e), the laminated body of the porous plate sheet | seat 30 and the cyclic | annular spacer sheet 40 which were produced in this way is formed for every opening part 23 of the cyclic | annular spacer sheet 40 by wire discharge cutting etc. Disconnect. Since each opening 23 corresponds to each annular spacer 21, the laminated body of the perforated plate sheet 30 and the annular spacer sheet 40 can be singulated for each annular spacer 21. Thus, the laminated board 10 for liquid filling nozzles shown in FIGS. 5-7 can be obtained. 8 (c), (d), and (e), the porous plate 11 and the annular spacer 21 are illustrated separately so that the layer structure of the laminate can be easily understood. ing.

  Since the liquid-filled nozzle laminate 10 according to the present embodiment is manufactured as described above, the second through hole 19 of the perforated plate 11 can also be formed in a region overlapping the frame 22 of the annular spacer 21. it can. Therefore, it is not necessary to form the through hole at the end of the opening region 15 of the porous plate 11 along the shape of the frame body 22 as in the case where the conventional through hole is not formed in the region overlapping the frame body 22. It can be set as the laminated board 10 for liquid filling nozzles which is excellent in property and has small flow resistance.

  Moreover, since the 2nd through-hole 19 can be provided to the edge part of the opening area | region 15 of the perforated plate 11, the laminated board 10 for liquid filling nozzles with a high aperture ratio and small flow resistance can be obtained.

  8 (c) and 8 (d) show a case where two porous plate sheets 30 are laminated and an annular spacer 21 is laminated on the front and back surfaces. The laminated plate for a liquid filling nozzle according to the present embodiment. The manufacturing method is not limited to this. The annular spacer 21 may be laminated on the front or back of one or more perforated plate sheets 30, or may be laminated only on one of the front side or the back side of the laminate of the perforated plate sheet 30. You may laminate | stack between board sheets 30. Moreover, when manufacturing the laminated board 10 for liquid filling nozzles, it is not restricted to the above, You may make it produce the porous plate 11 and the cyclic | annular spacer 21 separately, and may mutually laminate | stack them.

D. Liquid Filling Nozzle Next, an embodiment of the liquid filling nozzle 60 having the liquid filling nozzle laminate 10 according to the present embodiment will be described. FIG. 9 is an explanatory diagram showing an example of the liquid filling nozzle 60 and the liquid filling device 70.

  As shown in FIG. 9, the liquid filling nozzle 60 has a cylindrical nozzle body 61 and a discharge port 62 provided at the tip of the cylindrical nozzle body 61. The liquid-filled nozzle laminate 10 according to the present embodiment is attached to the vicinity of the discharge port 62 of the liquid-filled nozzle 60, particularly the discharge-side tip, by a fixing member.

E. Liquid filling apparatus will now be described an embodiment of a liquid filling apparatus 70 having a liquid filling nozzle laminates 10 according to the present embodiment. The liquid filling apparatus 70 according to the present embodiment includes a liquid filling nozzle 60, a metering cylinder 71, and a tank (not shown). The liquid filling nozzle 60 and the metering cylinder 71 are connected by a connection pipe 73, and the metering cylinder 71 and the tank are connected by a supply pipe 74. The connection pipe 73 and the supply pipe 74 are provided with an outflow check valve 75 and an inflow check valve 76, respectively.

  A piston 77 is provided inside the metering cylinder 71 so as to be movable up and down. When the piston 77 is moved downward, the inflow check valve 76 is opened, and the liquid in the tank is supplied to the metering cylinder 71 through the supply pipe 74. Further, when the piston 77 is moved upward, the outflow check valve 75 is opened, and the liquid supplied to the metering cylinder 71 is sent to the liquid filling nozzle 60 through the connection pipe 73 and filled into a container (not shown). The

  Moreover, there is no restriction | limiting in particular in the shape and material of the container used as the object filled with the liquid by the liquid filling apparatus by this Embodiment, For example, paper containers of various shapes, resin containers, glass containers, metal A container or the like can be used.

  When such a liquid filling apparatus 70 is used, the liquid is rectified by the liquid filling nozzle laminate 10 and fed into a container (not shown). At this time, pressure is repeatedly applied to the porous plate 11 of the laminated plate 10 for liquid-filled nozzles by a high-pressure liquid, and stress is concentrated particularly on the peripheral portion of the porous plate 11.

  On the other hand, according to the present embodiment, a plurality of first through holes 18 are regularly arranged on the center side of the metal substrate 12 of the porous plate 11, and a plurality of first through holes 18 are arranged on the peripheral side of the metal substrate 12. The two through holes 19 are regularly arranged. In this case, the shape of each first through-hole 18 is a polygonal shape, and the shape of each second through-hole 19 is a shape obtained by rounding the corners of the polygon forming the first through-hole 18, Or it is circular. Thus, the aperture ratio of the porous plate 11 as a whole is maintained high while ensuring the strength of the peripheral edge portion of the porous plate 11 where stress is likely to concentrate. Thereby, even after using the liquid filling apparatus 70 for a long time, it is possible to prevent the porous plate 11 from being deformed or damaged. Further, since the aperture ratio of the porous plate 11 is not greatly reduced, the filling productivity by the liquid filling device 70 is not lowered.

  A plurality of constituent elements disclosed in the above-described embodiment can be appropriately combined as necessary. Or you may delete a some component from all the components shown by the said embodiment.

DESCRIPTION OF SYMBOLS 10 Liquid filling nozzle laminated plate 11 Liquid filling nozzle porous plate 12 Metal substrate 16 1st through-hole area | region 17 2nd through-hole area | region 18 1st through-hole 19 2nd through-hole 21 Annular spacer 22 Frame 23 Opening part 28th 1 mesh line 29 2nd mesh line 70 Liquid filling device

Claims (7)

A perforated plate for a liquid filling nozzle,
It has a flat metal substrate,
A plurality of first through holes are regularly arranged on the center side of the metal substrate,
A plurality of second through holes are regularly arranged on the peripheral side of the metal substrate,
The shape of each first through hole is a polygonal shape,
The shape of each second through-hole is a shape obtained by rounding the corners of the polygon that constitutes the first through-hole, or a circular shape.   The perforated plate for a liquid filling nozzle according to claim 1, wherein the first through hole has a hexagonal shape, and the plurality of first through holes are arranged in a honeycomb shape.   3. The liquid filling nozzle according to claim 1, wherein a radius of curvature of a corner portion of the second through hole is 20% or more of a length of a polygonal side constituting the first through hole. Perforated plate.   The metal substrate has a substantially rectangular shape, and a region in which the second through hole is formed is provided in a region of 10% to 30% of the width of the metal substrate from a side of the metal substrate. The porous plate for liquid filling nozzles according to any one of claims 1 to 3.   The metal substrate has a substantially rectangular shape, and a region where the second through hole is formed is the widest in the vicinity of the center of the side of the metal substrate, and is gradually narrowed toward the end of the side. The perforated plate for a liquid-filled nozzle according to any one of claims 1 to 4. A perforated plate for a liquid filling nozzle according to any one of claims 1 to 5,
A laminated plate for a liquid filling nozzle, comprising: an annular spacer having a frame and an opening laminated on the porous plate for a liquid filling nozzle. A liquid filling apparatus having a liquid filling nozzle, a metering cylinder, and a connection pipe connecting the liquid filling nozzle and the metering cylinder,
The liquid filling nozzle has a cylindrical nozzle body and a discharge port provided at a tip of the cylindrical nozzle body, and the laminated plate for a liquid filling nozzle according to claim 6 is mounted in the vicinity of the discharge port. A liquid filling apparatus characterized by comprising:

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