Rotation support stand, rotation support unit, and method for assembling rotation support unit

Abstract

To provide a rotation support stand, a rotation support unit, and an assembly method of the rotation support unit for smoothly rotating a rotation member while stably supporting it with a simple structure.SOLUTION: A rotation support stand for supporting a rotation member having a protrusion at each of one end and the other end. The rotation support stand is formed in a frame shape, and includes a frame portion having support protrusions on each of two inner walls facing each other on one side, an annular first guide fitted into a first protrusion which is one support protrusion, and an annular second guide fitted into a second protrusion which is the other support protrusion. The rotation support stand supports the protrusion at one end of the rotation member by the first protrusion and the first guide, and supports the protrusion at the other end of the rotation member by the second protrusion and the second guide.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a rotation support stand for supporting a rotation member, and a rotation support unit in which the rotation member is combined with the rotation support stand. [Background technology]

[0002] Conventionally, there has been known a freestanding stand in which a panel printed with various images is attached to a base (see, for example, Patent Document 1). The stand in Patent Document 1 is configured so that the panel stands upright by fitting a protrusion on the panel into a mounting hole in the base and placing the panel with the base side facing downwards. Patent Document 1 also exemplifies a stand that is configured with a base formed with a mounting hole with a circular cross section and a panel with a cylindrical protrusion, and in this stand the panel is rotatable with respect to the base.

[0003] However, the stand in Patent Document 1 does not have a configuration that allows the panel to be rotated while placed on the table. In this regard, there is also a known stand that allows the rotation of the rotating member by drilling a hole in the center of a panel-shaped rotating member, passing a shaft through the hole, and fixing both ends of the shaft to the top and bottom of a frame that can stand upright. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2023-135589 Summary of the Invention [Problem to be solved by the invention]

[0005] However, conventional stands have a complicated structure for rotating the rotating member, and this structure makes it difficult to smoothly rotate the panel. Therefore, a stand with a simple structure that allows the rotating member to rotate smoothly is desired. [Means for solving the problem]

[0006] A rotating support stand according to one embodiment of the present invention is a rotating support stand that supports a rotating member having protrusions on each of its one and other ends, and has a frame portion formed in a frame shape and having support protrusions on each of two opposing inner walls on one side, a first annular guide that fits into the first protrusion, which is one of the support protrusions, and a second annular guide that fits into the second protrusion, which is the other support protrusion, and the first protrusion and first guide support the protrusion at one end of the rotating member, and the second protrusion and second guide support the protrusion at the other end of the rotating member.

[0007] A rotary support unit according to one embodiment of the present invention has a frame-shaped frame portion having support protrusions on each of two opposing inner walls, a first annular guide fitted into the first protrusion which is one of the support protrusions, a second annular guide fitted into the second protrusion which is the other support protrusion, and a plate-shaped rotating member having protrusions on each of one end and the other end, wherein the frame portion supports the protrusion at one end of the rotating member with the first protrusion and the first guide, and supports the protrusion at the other end of the rotating member with the second protrusion and the second guide.

[0008] A method for assembling a rotating support unit according to one embodiment of the present invention includes a first guide fitting step of fitting a ring-shaped first guide into a first protrusion, which is one of the support protrusions, of a frame section formed in a frame shape and having support protrusions on each of two opposing inner walls; a rotating member placement step of fitting a ring-shaped second guide into the protrusion at the other end of a rotating member having protrusions at each of its one and other ends, and abutting the protrusion at one end against the first protrusion while facing the protrusion at the other end against the second protrusion, which is the other support protrusion; and a second guide relocation step of moving the second guide fitted into the protrusion at the other end toward the second protrusion and fitting it into the second protrusion. [Effects of the Invention]

[0009] In the present invention, a first annular guide is fitted onto the first protrusion, and a second annular guide is fitted onto the second protrusion, and the first and second guides are configured to guide the rotational movement of the rotating member via the protrusions on both ends. This allows the rotating member to be stably supported and smoothly rotated with a simple structure. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view illustrating an example of the appearance of a rotation support unit according to an embodiment of the present invention; [Figure 2] 2 is an explanatory view illustrating a state in which each component of the rotation support unit in FIG. 1 is cut out from a resin plate. FIG. [Figure 3] 2A and 2B are explanatory views showing the rotary member of FIG. 1, in which (a) is a front view of the rotary member, and (b) is a front view illustrating a state in which a second guide is fitted into a protrusion of the rotary member. [Figure 4] 2A and 2B are explanatory views showing the frame part of FIG. 1, in which (a) is a front view of the frame part, and (b) is an example of a state in which a first guide is fitted into a support protrusion of a frame member. [Figure 5] 3A and 3B are explanatory diagrams illustrating how the rotation support unit of FIG. 1 is assembled, where (a) is an example of the state in which the rotation member in the state of FIG. 3B is placed within the frame of the frame part, and (b) is an example of the state in which the second guide has been moved to the support protrusion from the state of (a). [Figure 6] 2 is a flowchart illustrating steps involved in an assembly method for the rotation support unit of FIG. 1. [Figure 7] FIG. 10 is a perspective view illustrating an example of the appearance of a rotation support unit according to a first modified example of the embodiment of the present invention. [Figure 8] FIG. 10 is a perspective view illustrating an example of the appearance of a rotation support unit according to a second modification of the embodiment of the present invention. [Figure 9] FIG. 11 is a perspective view illustrating an example of the appearance of a rotation support unit according to a third modified example of the embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0011] Embodiment 1 to 5, a configuration example of a rotation support unit 100 according to an embodiment will be described. In each figure, some reference numerals are omitted as appropriate to avoid cluttering the drawings. Also, in each figure, outline arrows are shown as appropriate to indicate the movements of the first guide 31 and the second guide 32.

[0012] 1, the rotation support unit 100 is composed of a rotation support stand 10 and a rotation member 50. The rotation support stand 10 has a frame portion 20, a first guide 31, a second guide 32, and a base portion 40.

[0013] The rotation support unit 100 of this embodiment is configured so that each component (frame portion 20, first guide 31, second guide 32, base portion 40, and rotation member 50) is cut out from a single resin plate, and the overall thickness is uniform. The resin plate is formed of, for example, a highly transparent synthetic resin such as acrylic. In FIG. 1, although the edges and the like of each component of the rotation support unit 100 that may be visible through the plate are shown with relatively thin lines, some visible lines have been omitted or simplified to prioritize clarity.

[0014] 2 shows an example of a resin plate in which cuts have been made by a laser cutter or the like in the locations corresponding to the outer and inner peripheries of each component (only the outer periphery of the rotating member 50), and this also corresponds to the rotation support unit 100. The rotation support unit 100 has a remaining portion 80 from which each component can be easily separated by hand.

[0015] If the components of the rotation support unit 100 are packed in a bag or the like as a single plate including the remaining portion 80, it takes up less space and is easy to organize, making it highly convenient for transportation, display, etc. The plate-shaped rotation support unit 100 as shown in Figure 2 may or may not have the remaining portion 80 at the location of the fitting hole 3h and the fitting portion 41. However, the rotation support unit 100 may be sold without the remaining portion 80.

[0016] The base 40 is a plate-like member having a fitting portion 41 formed in the center. The base 40 in this embodiment is formed in a rectangular shape, with the fitting portion 41 formed along the longitudinal direction thereof. In order to stably support the frame 20, the fitting portion 41 is preferably formed in the center of the base 40 in the longitudinal direction and the center of the lateral direction. The fitting portion 41 may be formed in the shape of a groove or a through hole, as long as it allows for stable fitting of the fitting protrusion 23, which will be described later.

[0017] As shown in Fig. 3, the rotating member 50 is a plate-like member having protrusions (51, 52) on one end and the other end. The rotating member 50 is arranged to rotate around an axis on a line connecting the centers of the two protrusions (51, 52) (see the double-headed arrow in Fig. 1). It is preferable that the outer shape of the rotating member 50 in a plan view is formed to be line-symmetrical about the axis of rotation.

[0018] Here, the protrusion at one end is referred to as the one-end protrusion 51, and the protrusion at the other end is referred to as the other-end protrusion 52. The one-end protrusion 51 is provided in the center of one end of the rotating member 50, and the other-end protrusion 52 is provided in the center of the other end of the rotating member 50. The one-end protrusion 51 and the other-end protrusion 52 are each formed in a tapered shape that tapers toward the tip. The tapering angle of the one-end protrusion 51 can be adjusted depending on the thickness K of the first guide 31 and the size of the fitting hole 31h, etc., and the tapering angle of the other-end protrusion 52 can be adjusted depending on the thickness K of the second guide 32 and the size of the fitting hole 32h, etc.

[0019] The one-end protrusion 51 and the other-end protrusion 52 illustrated in each figure are each formed in the shape of an isosceles triangle when viewed from the front, with rounded tips. The tapered angle (vertex angle) of the one-end protrusion 51 and the tapered angle (vertex angle) of the other-end protrusion 52 may be the same or different. The length L1 of the one-end protrusion 51 is preferably formed to be longer than the thickness K of the first guide 31. The length L2 of the other-end protrusion 52 is preferably formed to be longer than the thickness K of the second guide 32.

[0020] The rotating member 50 illustrated in each figure has a main body portion 50A formed in a rectangular shape that is slightly smaller than the inner surface of the frame portion 20, with one end protrusion 51 and the other end protrusion 52 protruding on opposite sides. The rotating member 50 is used, for example, with an image such as an illustration or a photograph printed on one or both sides. The rotating member 50 in FIG. 1 is an example in which an image is printed on one side of the main body portion 50A. In FIG. 3(a), the boundaries between the main body portion 50A and each of the one end protrusion 51 and the other end protrusion 52 are indicated by dashed lines (virtual lines), but these are not formed separately but are formed integrally.

[0021] As shown in FIG. 4, the frame portion 20 is formed in a frame shape and has support protrusions (21, 22) on each of two opposing inner walls (2A, 2B). Hereinafter, one support protrusion will be referred to as the first protrusion 21, and the other support protrusion will be referred to as the second protrusion 22. The first protrusion 21 is provided at the center of the inner wall 2A, and the second protrusion 22 is provided at the center of the inner wall 2B. The first protrusion 21 and the second protrusion 22 are disposed to face each other and extend in opposite directions. The first protrusion 21 and the second protrusion 22 are each formed in a rectangular shape in cross section. The height h1 of the first protrusion 21 is shorter than the thickness K of the first guide 31, and the height h2 of the second protrusion 22 is shorter than the thickness K of the second guide 32.

[0022] The frame portion 20 also has a fitting protrusion 23 on the outer wall 2G that fits into the fitting portion 41 of the base portion 40. The fitting protrusion 23 is provided on the outer wall 2G at a position on the back side of the first protrusion 21. In other words, the fitting protrusion 23 extends outward from a position on the outer wall 2G that is back-to-back with the first protrusion 21. The length of the fitting protrusion 23 in the extension direction is equal to or less than the thickness of the base portion 40.

[0023] In other words, the frame portion 20 has a frame-shaped main body portion 20A and support protrusions (21, 22) extending in opposite directions from two opposing inner surfaces of the main body portion 20A. The frame portion 20 also has a fitting protrusion 23 on the outer surface of the main body portion 20A, located on the rear side of the surface from which the first protrusion 21 extends. In FIG. 4(a), the boundaries between the main body portion 20A and the first protrusion 21, the second protrusion 22, and the fitting protrusion 23 are indicated by dashed lines (phantom lines). However, these are not formed separately but are integrally formed. The frame portion 20 also has two opposing inner walls 2C formed flat. The rectangular inner wall of the frame portion 20, formed by the inner wall 2A, the inner wall 2B, and the two inner walls 2C, is referred to as the entire inner wall 2N.

[0024] As shown in FIG. 4(b), the first guide 31 is fitted onto the first protrusion 21, which is one of the support protrusions. As shown in FIG. 5(b), the second guide 32 is fitted onto the second protrusion 22, which is the other support protrusion. The first guide 31 and the second guide 32 are each formed in an annular shape and have a fitting hole 3h. That is, the first protrusion 21 is fitted into the fitting hole 3h of the first guide 31, and the second protrusion 22 is fitted into the fitting hole 3h of the second guide 32. The first guide 31 and the second guide 32 guide the rotational movement of the rotating member 50.

[0025] The first protrusion 21, the second protrusion 22, and the fitting protrusion 23 overlap each other in the extension direction. Here, the direction perpendicular to the extension direction and parallel to the surface on which the frame portion 20 is arranged is defined as the "left-right direction." The first protrusion 21 and the second protrusion 22 are preferably arranged so that their left-right centers overlap with the left-right center of the frame portion 20. This allows for smoother and more stable rotation of the rotating member 50. The fitting protrusion 23 is preferably arranged so that its left-right center overlaps with the left-right center of the inner wall 2A. This improves stability when the fitting protrusion 23 is fitted into the fitting portion 41 of the base portion 40 and the frame portion 20 is placed.

[0026] Here, when the rotation support unit 100 is assembled and displayed, it is positioned so that the base part 40 side, i.e., the first protrusion 21 side, is on the bottom side. Therefore, for convenience, the description may be made using an expression in which the first protrusion 21 side is considered to be the bottom side and the second protrusion 22 side is considered to be the top side.

[0027] The rotation support stand 10 is assembled so that the first protrusion 21 and the first guide 31 support one end protrusion 51 of the rotation member 50, and the second protrusion 22 and the second guide 32 support the other end protrusion 52 of the rotation member 50. More specifically, the one end protrusion 51 is supported by abutting against the first protrusion 21, and its rotation is guided by the first guide 31. The other end protrusion 52 is supported by the second protrusion 22 via the second guide 32. In other words, the second protrusion 22 functions to fix the second guide 32, and the other end protrusion 52 is guided in its rotation by the second guide 32.

[0028] The frame portion 20 of this embodiment has a first recess 21U in the inner wall 2A provided with the first protrusion 21, recessed in the opposite direction to the protruding direction of the first protrusion 21, and having the first protrusion 21 provided on its bottom surface 21v. The frame portion 20 also has a second recess 22U in the inner wall 2B provided with the second protrusion 22, recessed in the opposite direction to the protruding direction of the second protrusion 22, and having the second protrusion 22 provided on its bottom surface 22v.

[0029] The first recess 21U and the second recess 22U are formed at the center in the left-right direction. The first protrusion 21 protrudes from the center in the left-right direction of the bottom surface 21v of the first recess 21U, and the second protrusion 22 protrudes from the center in the left-right direction of the bottom surface 22v of the second recess 22U. The first recess 21U is formed so as not to interfere with the first guide 31 fitted into the first protrusion 21, and the first recess 21U is formed so as not to interfere with the second guide 32 fitted into the second protrusion 22. However, the width of the first recess 21U may be such that it lightly contacts the outer surface of the first guide 31 fitted into the first protrusion 21, and the width of the second recess 22U may be such that it lightly contacts the outer surface of the second guide 32 fitted into the second protrusion 22.

[0030] The rotation support stand 10 is such that the difference obtained by subtracting the distance (projection distance) T1 between the tip of one end projection 51 and the tip of the other end projection 52 on the rotating member 50 (see Fig. 3(a)) from the distance (support distance) S1 between the first projection 21 and the second projection 22 in the frame portion 20 (see Fig. 4(a)) is shorter than the thickness K of the second guide 32 (S1 - T1 < K). Specifically, the support distance S1 is the distance from the support surface 21f which is the inner surface of the first projection 21 to the opposing surface 22f which is the inner surface of the second projection 22. The projection distance T1 is the distance from the tip of the one end projection 51 to the tip of the other end projection 52. Thereby, as shown in Fig. 5(b), it can be configured such that the one end projection 51 abuts against the first projection 21 and the other end projection 52 is supported by the second guide 32.

[0031] Regarding the positional relationship between the other end projection 52 and the second guide 32 as illustrated in Fig. 3(b), (1) it may be configured such that the tip of the other end projection 52 is disposed within the fitting hole 3h of the second guide 32, (2) it may be configured such that the tip of the other end projection 52 and the outer surface of the second guide 32 are flush, or (3) it may be configured such that the tip of the other end projection 52 protrudes outside the second guide 32. However, in the case of (1), it is preferable to adjust so that the difference between the tip of the other end projection 52 and the outer surface of the second guide 32 becomes as small as possible.

[0032] Explaining in correspondence with the assembly process, the rotation support stand 10 is preferably configured such that the support distance S1 is not less than the distance (arrangement distance) T2 from the tip of the one end projection 51 of the rotating member 50 to the farther one of the tip of the other end projection 52 or the outer surface of the second guide 32 when the second guide 32 is fitted to the other end projection 52. With such a configuration, as shown in Fig. 5(a), in a state where the one end projection 51 is abutted against the first projection 21, the other end projection 52 and the second projection 22 can be easily opposed to each other.

[0033] Furthermore, in the rotation support stand 10, the distance S2 (inter-guide distance) from the inner surface of the first guide 31 fitted onto the first protrusion 21 to the inner surface of the second guide 32 fitted onto the second protrusion 22 is shorter than the inter-protrusion distance T1. Note that the inner surfaces of the guides (31, 32) refer to the surfaces that face each other. With this configuration, it is possible to create a state in which the tip of the one-end protrusion 51 of the rotation member 50 fits into the fitting hole 3h of the first guide 31, and the tip of the other-end protrusion 52 fits into the fitting hole 3h of the second guide 32, as shown in Figure 5(b).

[0034] Next, a method for assembling the rotation support unit 100 will be described with reference to the flowchart of FIG.

[0035] [Base fitting process] The user fits the fitting protrusions 23 of the frame unit 20 into the plate-shaped base unit 40 on which the fitting portions 41 are formed. As a result, the frame unit 20 is supported by the base unit 40 and can stand upright (step S101).

[0036] [First guide fitting process] The user fits the annular first guide 31 onto the first protrusion 21 of the frame part 20. See the side of the first protrusion 21 in FIG. 4(b) (step S102).

[0037] [Rotating member placement process] Next, as shown in FIG. 3(b), the user fits the annular second guide 32 onto the other-end protrusion 52 of the rotating member 50 (step S103). The user also positions the one-end protrusion 51 in contact with the first protrusion 21, while aligning the other-end protrusion 52 with the second protrusion 22. More specifically, the user positions the tip of the one-end protrusion 51 against the support surface 21f, which is the inner surface of the first protrusion 21. This results in the state shown in FIG. 5(a). In the example of FIG. 5(a), the support distance S1 is longer than the arrangement distance T2, and the other-end protrusion 52 and the second protrusion 22 can be easily arranged to face each other with the one-end protrusion 51 in contact with the first protrusion 21 (step S104).

[0038] [Second guide relocation process] 5(b), the user moves the second guide 32 fitted into the other-end protrusion 52 toward the second protrusion 22 and fits it into the second protrusion 22. The user stands the rotation support unit 100 upright, and presses (flicks) one of the left and right ends of the rotation member 50 supported by the rotation support stand 10 with a finger or the like, thereby rotating the rotation member 50 (step S105).

[0039] Although the above-described method for assembling the rotation support unit 100 has been described in the order of the step numbers shown in Fig. 6, the order of the steps does not matter as long as the unit can be assembled into the state shown in Fig. 1. For example, the base fitting step of step S101 may be performed after each of steps S102 to S105. Furthermore, the steps of step S103 and step S104 may be performed in parallel, for example, by fitting the second guide 32 into the other end protrusion 52 while the one end protrusion 51 is in contact with the first protrusion 21.

[0040] As described above, the rotation support stand 10 in this embodiment is configured to support one end protrusion 51 of the rotation member 50 with the first protrusion 21 and the first guide 31, and to support the other end protrusion 52 of the rotation member 50 with the second protrusion 22 and the second guide 32. That is, the rotation support stand 10 is configured so that the first guide 31 is fitted into the first protrusion 21 and the second guide 32 is fitted into the second protrusion 22, and the first guide 31 and the second guide 32 guide the rotational movement of the rotation member 50 via the protrusions (51, 52) at both ends. Therefore, the rotation support stand 10 can stably support the rotation member 50 while allowing it to rotate smoothly with a simple structure.

[0041] If the rotation support stand 10 is configured so that the first protrusion 21 is disposed on the lower side and the second protrusion is disposed on the upper side, the one-end protrusion 51 of the rotation member 50 is supported by abutting against the first protrusion 21 of the frame part 20. In other words, the tip of the one-end protrusion 51 of the rotation member 50 contacts the support surface 21f of the first protrusion 21, and the first guide 31 only assists the rotation of the one-end protrusion 51. Furthermore, when the rotation member 50 rotates, it only comes into contact with a portion of the inner circumference of the second guide 32 fixed to the second protrusion 22. In other words, the rotation support stand 10 is designed to minimize contact points with the rotation member 50, thereby achieving smooth and stable rotation of the rotation member 50.

[0042] In the present embodiment, the frame portion 20 has a first recess 21U in the inner wall 2A that has the first protrusion 21. The first recess 21U is recessed in the opposite direction to the protruding direction of the first protrusion 21, and the first protrusion 21 is provided on a bottom surface 21v of the first recess 21U. The frame portion 20 also has a second recess 22U in the inner wall 2B that has the second protrusion 22. The second recess 22U is recessed in the opposite direction to the protruding direction of the second protrusion 22, and the second protrusion 22 is provided on a bottom surface 22v of the second recess 21U. Therefore, when attaching the first guide 31 to the first protrusion 21, the first guide 31 can be retracted into the first recess 21U, and when attaching the second guide 32 to the second protrusion 22, the second guide 32 can be retracted into the second recess 22U. Therefore, the gap between one end of the rotating member 50 and the inner wall 2A of the frame portion 20, and the gap between the other end of the rotating member 50 and the inner wall 2B of the frame portion 20 can be narrowed, thereby increasing the strength of the frame portion 20 and improving its design.

[0043] The rotation support stand 10 of this embodiment is configured so that the difference obtained by subtracting the distance T1 between the tip of the one-end projection 51 and the tip of the other-end projection 52 of the rotation member 50 (protrusion-to-protrusion distance) from the distance S1 between the first projection 21 and the second projection 22 of the frame portion 20 (support-to-support distance) is shorter than the thickness K of the second guide 32. Therefore, even if the angle of the rotation support unit 100 after assembly is changed, the rotation member 50 will not come off the rotation support stand 10, thereby increasing the user's sense of security and reliability when using the rotation support stand 10.

[0044] Incidentally, the rotation support unit 100 can be assembled easily and accurately through the steps of a base fitting step, a first guide fitting step, a rotating member arrangement step, and a second guide relocation step, which are also shown in the flowchart of Fig. 6. Note that the rotation support unit 100 is a combination of the rotation support stand 10 and the rotating member 50, and the rotation support stand 10 and the rotating member 50 may be sold separately.

[0045] <Variation 1> The frame portion 20 may be configured without the first recess 21U and the second recess 22U, as shown in Fig. 7. Even in this case, the first protrusion 21 and the first guide 31 can stably support the one end protrusion 51 of the rotating member 50, while the second protrusion 22 and the second guide 32 can stably support the other end protrusion 52 of the rotating member 50. However, as can be seen from a comparison of Fig. 5(b) and Fig. 7, the gap between one end of the rotating member 50 and the inner wall 2A of the frame portion 20 and the gap between the other end of the rotating member 50 and the inner wall 2B of the frame portion 20 become wider, which not only slightly reduces the design but also relatively reduces the strength of the frame portion 20.

[0046] The frame portion 20 may be configured to have either the first recess 21U or the second recess 22U. This narrows the gap between one end of the rotating member 50 and the inner wall 2A of the frame portion 20, or the gap between the other end of the rotating member 50 and the inner wall 2B of the frame portion 20, thereby improving the design and increasing the strength of the frame portion 20 to a certain extent. From the perspective of stability, it is preferable to provide the first recess 21U on the lower side and increase the volume of the inner wall 2A side relatively, since this lowers the center of gravity of the frame portion 20. Other configurations are the same as those described above. The rotation support stand 10 and rotation support unit 100 of this variation 1 also enable smooth and stable rotation of the rotating member 50 with a simple structure. Other advantages are the same as those of the configuration described above.

[0047] <Variation 2> As shown in FIG. 8 , the frame portion 20 may be a polygonal frame in a planar view, and the shape of the rotational member 50 may be adjusted accordingly. While FIG. 8 illustrates a frame portion 20 that is hexagonal in a planar view and a rotational member 50 that has a hexagonal outer shape in a planar view, the present invention is not limited to this. The frame portion 20 may be a frame of various polygonal shapes in a planar view, and the rotational member 50 may be formed to have an outer shape of various polygonal shapes in a planar view. However, in the rotation support unit 100, the inner wall surface of the frame portion 20 and the outer shape of the rotational member 50 may be symmetrical about the rotation axis of the rotational member 50 in a planar view. For example, the frame portion 20 may be a frame of circular or elliptical shape in a planar view, and the rotational member 50 may be formed to have an outer shape of circular or elliptical shape in a planar view. Other configurations are the same as those described above. The rotation support stand 10 and rotation support unit 100 of this modified example 2 also enable smooth and stable rotation of the rotation member 50 with a simple structure. Other effects obtained are similar to those of the configuration of the main text described above. The configuration of modified example 1 can also be applied to the rotation support unit 100 of modified example 2.

[0048] <Variation 3> The frame portion 20 may be configured such that the first protrusion 21 and the second protrusion 22 are arranged side-by-side, as shown in FIG. 9 . In this case, the fitting protrusion 23 is arranged on the outer wall 2G of the frame portion 20 at a position where the first protrusion 21 and the second protrusion 22 are not back-to-back. With this configuration, the one-end protrusion 51 of the rotation member 50 contacts the lower portion of the first guide 31, and the other-end protrusion 52 contacts the lower portion of the second guide 32. However, the contact area between the protrusions is minimized, allowing the rotation member 50 to rotate smoothly and stably. Other configurations are the same as those described above. The rotation support stand 10 and the rotation support unit 100 of this third variation also allow the rotation member 50 to rotate smoothly and stably with a simple structure. Other effects are the same as those of the configuration of the third variation. The configurations of the first and second variations can also be applied to the rotation support unit 100 of the third variation.

[0049] The above-described embodiment is an example of the rotation support stand, rotation support unit, and rotation support unit assembly method according to the present invention, and the technical scope of the present invention is not limited to these embodiments. For example, the shapes of the first guide 31 and the second guide 32 are not limited to the examples shown in the figures, and may be modified as appropriate as long as their respective functions are maintained. While the figures illustrate the first guide 31 and the second guide 32 with circular outer and inner peripheries in a plan view, this is not limiting. For example, the outer peripheries of the first guide 31 and the second guide 32 may be polygonal, elliptical, or the like in a plan view.

[0050] The number, shape, and arrangement of the fitting protrusions 23 and the fitting portions 41 are not limited to the examples shown in the figures and may be modified as appropriate as long as the stability of the fitting is not compromised. For example, the fitting portions 41 may be formed along the short direction of the rectangular base portion 40 or at an angle to the long direction. However, the base portion 40 does not necessarily have to be rectangular in plan view, and the fitting portions 41 may be provided in a location other than the center of the base portion 40. The fitting portions 41 do not necessarily have to be slit-shaped. The frame portion 20 may have multiple fitting protrusions 23. In this case, the base portion 40 may have multiple fitting portions 41 corresponding to the multiple fitting protrusions 23 one-to-one, or may have a fitting portion 41 into which multiple fitting protrusions 23 are fitted together. The height h1 of the first protrusions 21 and the height h2 of the second protrusions 22 may be equal to or different from each other. The thickness K of the first guide 31 and the thickness K of the second guide 32 may be equal to or different from each other. The length L1 of the one end protrusion 51 and the length L2 of the other end protrusion 52 may be equal to or different from each other.

[0051] The frame unit 20 and the base unit 40 may be integrally formed. For example, a frame unit having a shape obtained by combining the frame unit 20 and the base unit 40 may be formed by injection molding using a mold or by a 3D printer. In this case, the frame unit 20 does not have the fitting protrusion 23, and the base unit 40 does not have the fitting portion 41. Similarly, the frame unit 20 and the first guide 31 may be integrally formed, and further, the frame unit 20, the first guide 31, and the base unit 40 may be integrally formed. However, it is more convenient for the rotation support stand 10 to be configured so that each component (the frame unit 20, the first guide 31, the second guide 32, and the base unit 40) is cut out from a single resin plate, as this saves space during transportation and display.

[0052] The rotating support stand 10 can stably support and smoothly rotate various shapes of rotating members 50 having one end protrusion 51 and the other end protrusion 52 arranged at appropriate positions. That is, the rotating member 50 is not limited to a plate-shaped one, and various shapes can be adopted. For example, an optional or separately sold rotating member 50 may be supported on the rotating support stand 10, and the rotating member 50 may be enjoyed by rotating. The rotating support stand 10 and the rotating member 50 may not be transparent, and may be translucent. Each figure shows an example in which the edges of each component of the rotating support unit 100 are rounded (chamfered) in a plan view, but this is not essential. [Explanation of symbols]

[0053] 2A to 2C inner wall, 2G outer wall, 2N frame inner wall, 3h fitting hole, 10 rotation support stand, 20 frame portion, 20A, 50A main body portion, 21 first protrusion, 21U first recess, 21f support surface, 21v, 22v bottom surface, 22 second protrusion, 22U second recess, 22f opposing surface, 23 fitting protrusion, 31 first guide, 31h, 32h fitting hole, 32 second guide, 40 base portion, 41 fitting portion, 50 rotation member, 51 one end protrusion, 52 other end protrusion, 80 remaining portion, 100 rotation support unit, h1, h2 height, K thickness, S1 distance between supports, S2 distance between guides, T1 distance between protrusions, T2 arrangement distance.

Claims

1. A rotary support stand for supporting a rotary member having protrusions at one end and the other end, a frame portion formed in a frame shape and having support protrusions on two opposing inner walls of one side; a first annular guide fitted onto the first protrusion, which is one of the support protrusions; and an annular second guide fitted into the second protrusion, which is the other of the support protrusions, A rotary support stand in which the first protrusion and the first guide support the protrusion portion at one end of the rotating member, and the second protrusion and the second guide support the protrusion portion at the other end of the rotating member.

2. The frame portion is the inner wall includes at least one of a first recess provided in the inner wall having the first protrusion and a second recess provided in the inner wall having the second protrusion; The first recess is a recess on the opposite side to the protruding direction of the first protrusion, and the first protrusion is provided on the bottom surface of the recess; 2. The rotation support stand according to claim 1, wherein the second recess is recessed in a direction opposite to the direction in which the second protrusion protrudes, and the second protrusion is provided on the bottom surface of the second recess.

3. A rotating support stand as described in claim 1 or 2, wherein the difference obtained by subtracting the distance between the tip of the protrusion at one end of the rotating member and the tip of the protrusion at the other end from the distance between the first protrusion and the second protrusion in the frame portion is shorter than the thickness of the second guide.

4. a frame portion formed in a frame shape and having support protrusions on two opposing inner walls of one side; a first annular guide fitted onto the first protrusion, which is one of the support protrusions; a second annular guide fitted onto the second protrusion, which is the other of the support protrusions; a plate-shaped rotating member having protrusions at one end and the other end, A rotation support unit in which the first protrusion and the first guide support the protrusion portion at one end of the rotating member, and the second protrusion and the second guide support the protrusion portion at the other end of the rotating member.

5. The frame portion is the inner wall includes at least one of a first recess provided in the inner wall having the first protrusion and a second recess provided in the inner wall having the second protrusion; The first recess is a recess on the opposite side to the protruding direction of the first protrusion, and the first protrusion is provided on the bottom surface of the recess; The rotation support unit according to claim 4 , wherein the second recess is recessed in a direction opposite to a direction in which the second protrusion protrudes, and the second protrusion is provided on a bottom surface of the second recess.

6. 6. A rotation support unit as described in claim 4 or 5, wherein the difference obtained by subtracting the distance between the tip of the protrusion at one end of the rotation member and the tip of the protrusion at the other end from the distance between the first protrusion and the second protrusion in the frame portion is shorter than the thickness of the second guide.

7. The device further includes a plate-shaped base portion on which a fitting portion is formed, The frame portion is The rotation support unit according to claim 4 or 5, further comprising a fitting protrusion on an outer wall thereof, the fitting protrusion being fitted into the fitting portion.

8. a first guide fitting step of fitting an annular first guide into a first protrusion, which is one of the support protrusions of the frame part formed in a frame shape and having support protrusions on two mutually opposing inner walls of one side; a rotating member arrangement step of fitting an annular second guide onto the protrusion at the other end of a rotating member having protrusions at each of its one end and the other end, and bringing the protrusion at one end into contact with the first protrusion while bringing the protrusion at the other end into opposition to a second protrusion, which is the other of the support protrusions; a second guide relocation step of moving the second guide, which is fitted into the protrusion at the other end, toward the second protrusion and fitting it into the second protrusion.

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