Fixed structure, storage shelf, and fixing method

Abstract

The present invention provides a fixing structure, storage shelf, and fixing method that can easily prevent objects from tipping over. [Solution] The fixing structure comprises a fixing member disposed on the mounting surface and including a first screw groove having a screw shaft in the first direction; an engaging member including a second screw groove that engages with the first screw groove and a spur gear having a gear shaft in the first direction; and a guide portion fixed to the bottom of the object in the first direction and having a linear tooth profile gear that meshes with the spur gear.

Description

Technical Field

[0004] , , , ,

[0001] The present disclosure relates to a fixing structure, a storage shelf, and a fixing method.

Background Art

[0002] By fitting a fixing fitting fixed to the floor and an anti-tipping fitting fixed to an object, the object is prevented from tipping over.

[0003] For example, Patent Document 1 discloses "a cabinet provided with casters disposed on a cabinet bottom plate, a pair of reinforcing members in a U-shape in front view disposed to run in the front-rear direction below the cabinet bottom plate, and anti-tipping fittings having head plate members at the lower portions of vertical necks, which are attached and disposed near the respective reinforcing members on the lower surface of the cabinet bottom plate". In the pair of fixing fittings in the cabinet, the rear ends are close to the wall and orthogonal to the wall, and are installed and fixed to the floor so as to be parallel at an interval equal to the interval between the pair of anti-tipping fittings. The pair of fixing fittings has a bottom plate member seated on the floor surface, a pair of side plate members, a pair of upper plate members, an engagement plate member, and a guide groove, the front-rear length of which is substantially equal to the length of the reinforcing member of the cabinet. The pair of side plate members are formed such that the left and right side edges of the bottom plate member are bent upward at right angles respectively. The pair of upper plate members are formed such that the upper side edges of the respective side plate members are bent inward at right angles. The engagement plate member connects the rear portions of the pair of upper plate members such that a predetermined upper surface coincides with the upper surface of the upper plate members. The guide groove is tapered and formed in the engagement plate member so as to expand on the front side, and the neck of the anti-tipping fitting is pushed into the guide groove. One of the upper plate members is fixed to the reinforcing member with bolts such that a predetermined upper surface is in close contact with the lower surface of the reinforcing member in a state where the anti-tipping fitting of the cabinet is fitted to the engagement plate member.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

[0005] In the cabinet installation structure disclosed in Patent Document 1, an anti-tipping bracket fixed to the cabinet is fitted into an engaging plate member of a fixing bracket fixed to the floor, and a reinforcing member of the cabinet is fixed to the fixing bracket. The reinforcing member of the cabinet and the fixing bracket are fastened together with bolts. However, depending on the arrangement of the reinforcing members, it may be difficult to secure space for placing tools. In such cases, it becomes difficult to fasten bolts with tools, making it difficult to prevent the object from tipping over.

[0006] The purpose of this disclosure is to provide a fixed structure, a storage shelf, and a fixing method that solve the above-mentioned problems. [Means for solving the problem]

[0007] The fixing structure of this disclosure comprises: a fixing member disposed on a mounting surface and including a first screw groove having a screw shaft in a first direction; an engaging member including a second screw groove that engages with the first screw groove and a spur gear having a gear shaft in the first direction; and a guide portion fixed to the bottom of an object in the first direction and having a linear tooth profile gear that meshes with the spur gear.

[0008] The fixing method of this disclosure includes the steps of: arranging a fixing member including a first screw groove having a screw shaft in a first direction on a mounting surface; preparing an engaging member including a second screw groove that engages with the first screw groove and a spur gear having a gear shaft in the first direction; and a guide portion fixed to the bottom of an object in the first direction and having a linear tooth profile gear; and meshing the gear and the spur gear. [Effects of the Invention]

[0009] The fixing structure, storage shelf, and fixing method described herein make it easier to prevent objects from tipping over. [Brief explanation of the drawing]

[0010] [Figure 1] This is a perspective view showing an example of a storage shelf related to this disclosure. [Figure 2] This is a perspective view showing a part of the configuration of the storage shelf related to this disclosure. [Figure 3] This is a perspective view I showing a part of the configuration of the fixed structure related to this disclosure. [Figure 4] This is a perspective view II showing a part of the configuration of the fixed structure related to this disclosure. [Figure 5] This is a perspective view I showing an example of a fixed structure related to this disclosure. [Figure 6] This is a plan view showing a part of the configuration of the fixed structure related to this disclosure. [Figure 7] This is a perspective view III showing a part of the configuration of the fixed structure related to this disclosure. [Figure 8] This is a partially enlarged view of a portion of the configuration of the fixed structure related to this disclosure. [Figure 9] This diagram shows a series of operations in the fixed structure related to this disclosure. [Figure 10] This is flowchart I, which shows an example of the processing of the fixing method related to this disclosure. [Figure 11] This is a perspective view showing an example of a fixed structure in a comparative example. [Figure 12] This is a perspective view II showing an example of a fixed structure related to this disclosure. [Figure 13] This is flowchart II, illustrating an example of the processing of the fixing method related to this disclosure. [Modes for carrying out the invention]

[0011] The embodiments of this disclosure will be described below with reference to the drawings. The drawings and specific configurations used in each embodiment should not be used to interpret the disclosure. In all drawings, identical or corresponding components are denoted by the same reference numerals, and common descriptions are omitted. In this disclosure, the drawings are associated with one or more embodiments.

[0012] <First Embodiment> Hereinafter, an embodiment according to the present disclosure will be described with reference to the drawings. Hereinafter, an example of the configuration of the fixing structure in the present disclosure will be described with reference to FIGS. 1 to 9.

[0013] Hereinafter, the axial direction of the screw axis AX of the first screw groove 211g included in the fixing member 21 is referred to as the Z direction. The direction intersecting the Z direction and in which the fixing member 21 is introduced into the hook portion 231 is referred to as the Y direction. Further, the direction intersecting the Z direction and the Y direction is referred to as the X direction. Also, one side in the X direction is the +X direction, and the other side in the X direction is the -X direction. Also, one side in the Y direction is the +Y direction, and the other side in the Y direction is the -Y direction. Also, one side in the Z direction is the +Z direction, and the other side in the Z direction is the -Z direction.

[0014] For example, the X direction, the Y direction, and the Z direction may be directions orthogonal to each other. For example, the mounting surface MS on which the fixing member 21 is disposed may be a surface along the XY plane and facing the +Z direction.

[0015] The above expressions are for convenience of explanation and do not limit the direction in which the fixing member 21 is disposed.

[0016] (Configuration of Storage Shelf) The storage shelf 100 is used for installing a device housing such as an information processing device. An example of the storage shelf 100 is a server rack. The device housing is an example of the "object". As shown in Figure 1-2, the storage shelf 100 comprises a shelf 10 and one or more (e.g., multiple) fixing structures 20. A part of the fixing structure 20 (the guide portion 23 described later) is fixed to the bottom of the object X. For example, the object X is the device housing described above. For example, in this disclosure, the object X is prevented from tipping over by two fixing structures 20. Therefore, as shown in Figure 3-4, two guide portions 23 are fixed to the bottom of the object X in the first direction. The number of fixing structures 20 required to prevent the object X from tipping over may be set as appropriate. Note that if there are multiple fixing structures 20 required to prevent the object X from tipping over, the guide portions 23 are not limited to being arranged in a straight line.

[0017] For example, the storage shelf 100 in this disclosure stores multiple objects Xm using multiple fixing members 21m. The multiple fixing members 21m include multiple fixing members 21 described later, and the multiple objects Xm include multiple objects X. The shelf 10 has a mounting surface MS for arranging the fixing members 21 of the fixing structure 20. For example, a large number of fixing members 21 are arranged on the mounting surface MS in this disclosure. However, if there are multiple fixing structures 20 required to prevent the object X from tipping over, the fixing members 21 are not limited to being arranged in a straight line.

[0018] (Overview of the fixed structure) As shown in Figure 5, in the fixing structure 20 of this disclosure, when the guide portion 23 is introduced toward the fixing member 21 from a predetermined direction (for example, the Y direction), the engaging member 22 that engages with the fixing member 21 rises toward the +Z direction and presses against the bottom of the object X. This suppresses rattling of the object X and prevents the object X from tipping over. If the rotational direction when the threaded portion (the portion including the second thread groove 221g) of the engaging member 22 is tightened toward the fixing member 21 is called the first rotational direction ROT1, then when the guide portion 23 is introduced toward the fixing member 21, a force is applied to the engaging member 22 in the opposite direction to the first rotational direction ROT1 (hereinafter also referred to as the "second rotational direction ROT2"). (Configuration of fixed structure) As shown in Figure 5, the fixing structure 20 includes a fixing member 21, an engaging member 22, a guide portion 23, and an elastic member 24. The elastic member 24 reduces vibrations transmitted to the object X via the mounting surface MS. Examples of the elastic member 24 include rubber, a spring, and a gel. The elastic member 24 is positioned between the spur gear 222 (described later) and the bottom of the object in the first direction. For example, the elastic member 24 in this disclosure is mounted on the spur gear 222.

[0019] (Configuration of fixing members) As shown in Figure 6, the fixing member 21 includes a first thread groove 211g having a thread axis Ax in a first direction (for example, the Z direction). The fixing member 21 is disposed on the mounting surface MS. The fixing member 21 including the first thread groove 211g may be a male thread or a female thread. For example, the fixing member 21 comprises a main body portion 211 and a flange portion 212.

[0020] The main body portion 211 is a columnar member having a cylindrical, prismatic, or other predetermined cross-sectional shape extending in the Z direction. The main body portion 211 has an engagement hole 211h that opens in the Z direction. The engagement hole 211h may be a through hole. The inner circumferential surface of the engagement hole 211h has a first screw groove 211g. In this disclosure, since the inner circumferential surface of the engagement hole 211h has a first screw groove 211g, the fixing member 21 is a female thread.

[0021] The flange portion 212 is capable of contacting the stepped surface 23sf, which will be described later. The flange portion 212 has an axis in the first direction. For example, the axis of the flange portion 212 in this disclosure is coaxial with the screw axis Ax. The flange portion 212 includes a first surface 212a and a second surface 212b. The first surface 212a is the surface facing the mounting surface MS. The second surface 212b is the surface located on the opposite side from the first surface 212a. The second surface 212b is the surface facing the spur gear 222 (see Figure 5-6).

[0022] (Configuration of the engaging member) As shown in Figure 6, the engaging member 22 includes a second screw groove 221g that engages with the first screw groove 211g, and a spur gear 222. The engaging member 22, including the second screw groove 221g, may be either a female thread or a male thread. For example, the engaging member 22 comprises a main body portion 221 and a spur gear 222.

[0023] The main body 221 has a second screw groove 221g coaxial with the screw shaft Ax. In this disclosure, since the inner circumferential surface of the engagement hole 211h has a first screw groove 211g, the engagement member 22 is a male screw.

[0024] The spur gear 222 has a gear axis in the first direction (for example, the Z direction). The gear axis is coaxial with the screw axis Ax.

[0025] (Guide section configuration) As shown in Figures 5 and 7-8, the guide portion 23 has a linear-toothed gear 23r that meshes with the spur gear 222. The guide portion 23 is fixed to the bottom of the object X in the first direction. For example, the guide section 23 comprises a hook section 231 and one or two rail sections 232. The rail sections 232 are arranged continuously with respect to the hook section 231 in a second direction.

[0026] The hook portion 231 grips the fixing member 21 introduced from a second direction (for example, the Y direction) that intersects the first direction. The hook portion 231 has a claw portion 231c that expands toward the fixing member 21. The hook portion 231 has a stepped surface 23sf around the expanded portion of the claw portion 231c. As shown in Figure 7-8, a counterbore 231cu is formed around the expanded portion of the claw portion 231c, thereby forming a stepped surface 23sf that is stepped with the upper surface 23s of the hook portion (or the bottom of the object). A gear 23r is positioned on the side circumferential surface of the counterbore 231cu formed in the hook portion 231. The position of the gear 23r is determined so that when it meshes with the spur gear 222, it rotates the engaging member 22 in the second rotational direction ROT2. For example, if the engaging member 22 is a reverse thread, the gear 23r is located on the -X side of the side circumferential surface of the counterbore 231cu. For example, if the engaging member 22 is a standard thread, the gear 23r is located on the +X side of the side circumferential surface of the counterbore 231cu.

[0027] The rail section 232 introduces the fixing member 21 into the hook section 231 from a second direction (for example, the Y direction) that intersects the first direction. For example, in this disclosure, the rail section 232 is provided on both the left and right sides, centered on the claw section 231c. The rail section 232 has an expansion angle with respect to the second direction.

[0028] The rail portion 232 has an inclined portion 232s. The inclined portion 232s extends in a second direction while having an inclined surface 23ss that becomes smaller in a first direction (e.g., the Z direction) as it approaches the fixing member 21. The inclined surface 23ss is aligned continuously with respect to the stepped surface 23sf in the second direction. As shown in Figure 7-8, an opening 232ap opening in the +Z direction is formed around the inclined portion 232s, so that the inclined surface 23ss has a step between it and the upper surface 23s. This step prevents contact between the flange portion 212 and the rail portion 232.

[0029] As shown again in Figure 3-4, the guide section 23 is located within the lower surface area of ​​the object X when viewed from the first direction (for example, the Z direction). This reduces the floor space required for the installation of the object X.

[0030] As shown in Figures 6 and 8-9, if the distance from the mounting surface MS to the first surface 212a of the flange portion 212 is defined as the first distance A1, and the distance from the mounting surface MS to the stepped surface 23sf is defined as the second distance A2, then the first distance A1 is smaller than the second distance A2.

[0031] As shown in Figure 9, when viewed from the Z direction, the tooth tips of the spur gear 222 are positioned to overlap with the flange portion 212. That is, when viewed from the Z direction, the tooth tips of the spur gear 222 are located within the first surface 212a.

[0032] As shown in Figures 6 and 8-9, if the distance from the mounting surface MS to the second surface 212b of the flange portion 212 is defined as the third distance A3, and the distance from the mounting surface MS to the end of the gear 23r is defined as the fourth distance A4, then the third distance A3 is smaller than the fourth distance A4.

[0033] The diameter of the flange portion 212 is slightly smaller than the distance between the side surfaces of the counterbore 231cu in a third direction (for example, the X direction) that intersects the first and second directions. In addition, the outer dimensions of the main body portion 211 are slightly smaller than the distance between the two surfaces of the expanding portion of the claw portion 231c in the third direction. As a result, the rail portion 232 can easily guide the fixing member 21 to the correct position on the hook portion 231. Furthermore, in the third direction, the diameter of the cutting edge circle of the spur gear 222 is slightly smaller than the diameter of the flange portion 212. This prevents wear of the spur gear 222 due to contact with the side surface of the counterbore 231cu.

[0034] The engaging member 22 and the guide portion 23 in this disclosure are examples of a rack and pinion. In a fixing structure for an object X using a rack and pinion, the position of the deepest part of the expanding portion relative to the fixing member 21 is easily uniquely determined.

[0035] (Operation of the engaging member 22) In Figure 9, the upper section shows a plan view of how the guide section 23 is introduced toward the fixing member 21 from a predetermined direction (for example, the Y direction), and the lower section shows a partial cross-sectional view of the same state as seen from the side. The process by which the engaging member 22 rises in the +Z direction and presses against the bottom of the object X is described in detail below.

[0036] As shown in Figure 9 (9-1), after the flange portion 212 rides onto the inclined portion 232s, the guide portion 23 moves such that the fixing member 21 moves relative to the deepest part of the expanded portion. At this time, because the rail portion 232 has an expanded angle with respect to the second direction, when the first surface 212a of the flange portion 212 is introduced while in contact with the inclined surface 23ss, the fixing member 21 moves relative to the claw portion 231c.

[0037] As shown in Figures 9(9-2) to (9-4), the spur gear 222 engages with the gear 23r when the fixing member 21 moves relative to the deepest part of the expanded portion. As the fixing member 21 continues to move relative to the gear, the spur gear 222 rotates in the second rotational direction ROT2. As the spur gear 222 rotates, the threaded portion of the engaging member 22 (the portion including the second thread groove 221g) is rotated in the second rotational direction ROT2. Due to the rotation in the second rotational direction ROT2, the engaging member 22 rises in the +Z direction. After rising by a predetermined amount, the spur gear 222, which is mounted on the engaging member 22, presses against the bottom of the object X via the elastic member 24.

[0038] Furthermore, when the fixing member 21 rides onto the stepped surface 23sf, the fixing member 21 presses the hook portion toward the -Z direction due to the relationship between the first distance A1 and the second distance A2 described above.

[0039] (Fixing method) An example of the fixing method described herein will be explained below with reference to Figure 10.

[0040] First, the worker places a fixing member, which includes a first screw groove 211g having a screw shaft in the first direction, onto the mounting surface MS (Step ST10: Step of placing the fixing member onto the mounting surface).

[0041] Next, the worker prepares an engaging member which includes a second screw groove 221g that engages with the first screw groove 211g and a spur gear 222 having a gear shaft in the first direction, and a guide part which is fixed to the bottom of the object in the first direction and has a linear tooth gear 23r (Step ST11: Preparation step).

[0042] Next, the worker meshes gear 23r with spur gear 222 (Step ST12: step of meshing gear and spur gear). Here, the meshing of the gear 23r of the guide section with the spur gear 222 causes the threaded portion of the engaging member (including the second thread groove 221g) to rotate in the direction opposite to the tightening direction. This rotation causes the engaging member 22 to move toward the bottom of the object X in the first direction, and the engaging member 22 presses against the object X. (End)

[0043] (Mechanism of Action and Effects) The fixing structure 20 of this embodiment comprises a fixing member 21 disposed on the mounting surface MS and including a first screw groove 211g having a screw shaft Ax in the first direction; an engaging member 22 including a second screw groove 221g that engages with the first screw groove 211g and a spur gear 222 having a gear shaft in the first direction; and a guide portion 23 fixed to the bottom of the object X in the first direction and having a linear tooth gear 23r that meshes with the spur gear 222. The meshing of the gear 23r of the guide portion and the spur gear 222 causes the screw portion of the engaging member 22 (the portion including the second screw groove 221g) to rotate in the direction opposite to the tightening direction. This rotation causes the engaging member 22 to move toward the bottom of the object X in the first direction, and the engaging member 22 presses against the object X. As a result, rattling of the object X installed on the mounting surface MS is suppressed, and tipping of the object X is suppressed. Therefore, the fixing structure relating to this disclosure is effective in preventing the object from tipping over.

[0044] Here, as a comparative example, let's consider an object X' equipped with an anti-tipping device ST at its bottom. As shown in Figure 11, the anti-tipping device ST is a sheet metal member having two bends. When the anti-tipping device ST shown in Figure 11 is installed at the bottom of object X', the anti-tipping device ST requires an area larger than the bottom surface area of ​​object X'.

[0045] In contrast, the fixed structure according to this disclosure only requires an area equivalent to the area of ​​the underside of the object X as the area required for the fixed structure 20. Therefore, when setting up the object X in a limited space such as a server rack, it is not necessary to provide space for the anti-tipping device ST.

[0046] In addition to the above configuration, the fixing structure 20 of this disclosure further includes a hook portion 231 having a claw portion 231c that expands toward the fixing member 21, and a gear 23r is arranged in the hook portion 231. As a result, the fixing member 21 is gripped by the claw portion 231c, and the engaging member 22 is pressed by the meshing of the gear 23r and the spur gear 222. Therefore, the effect is also obtained that the fixing member 21 is easily fixed when the engaging member 22 presses against the object X.

[0047] In addition, the fixing structure 20 of this disclosure further includes a flange portion 212 having an axis in the first direction, a rail portion 232 for introducing the fixing member 21 to the hook portion 231 from a second direction, and an inclined portion 232s extending inclined so as to become smaller in the first direction as it approaches the fixing member 21, with the second direction being a direction intersecting the first direction. As a result, when the flange portion 212 is introduced while in contact with the inclined portion 232s, the fixing member 21 moves relatively toward the claw portion 231c. Therefore, the rail portion 232 can also be used to guide the fixing member 21 to the correct position on the hook portion 231.

[0048] In addition, in the fixing structure 20 of this disclosure, the rail portion 232 is further arranged in a second direction with respect to the hook portion 231, the hook portion 231 has a stepped surface 23sf around the expanding portion of the claw portion 231c, and the flange portion 212 is capable of contacting the stepped surface 23sf. As a result, when the engaging member 22 presses against the object X, the flange portion 212 contacts the stepped surface 23sf, and the surface pressure between the flange portion 212 and the hook portion 231 increases. Therefore, the effect of suppressing rattling of the hook portion 231 on the mounting surface MS, thereby further suppressing the tipping of the object is obtained. A further effect is obtained when the weight of the object X is smaller than a predetermined size relative to the force with which the engaging member 22 presses against the object X.

[0049] In addition, the fixing structure 20 of this disclosure has the following effect because, "when the distance from the mounting surface MS to the first surface 212a of the flange portion 212 is defined as the first distance A1, and the distance from the mounting surface MS to the stepped surface 23sf is defined as the second distance A2, the first distance A1 is smaller than the second distance A2, and the first surface 212a is the surface facing the mounting surface MS." In the fixing structure 20 of this disclosure, the flange portion 212 presses the hook portion 231 toward the mounting surface MS via the stepped surface 23sf, thereby suppressing rattling of the hook portion 231 on the mounting surface MS. As a result, tipping of the object is further suppressed.

[0050] In addition, the fixing structure 20 of this disclosure has the following effect because, "when the distance from the mounting surface MS to the second surface 212b on the flange portion 212 is defined as the third distance A3, and the distance from the mounting surface MS to the end of the linear tooth profile is defined as the fourth distance A4, the third distance A3 is smaller than the fourth distance A4, and the second surface 212b is the surface located on the opposite side from the first surface 212a." The fixed structure 20 of this disclosure prevents wear of the gear 23r due to contact with the flange portion 212.

[0051] Furthermore, the fixing structure 20 of this disclosure also has the effect of preventing wear of the spur gear 222 due to contact with the hook portion 231, by positioning the tooth tips of the spur gear 222 to overlap with the flange portion 212 when viewed from the first direction.

[0052] Furthermore, the fixing structure 20 of this disclosure also provides the effect of "reducing vibrations transmitted to the object X via the mounting surface MS, and / or protecting the bottom of the object X" by "further comprising an elastic member 24, the elastic member 24 being positioned between the spur gear 222 and the bottom portion."

[0053] Furthermore, the storage shelf 100 of this disclosure has the following effects by "equipping the above-mentioned fixing structure 20 and a shelf having a mounting surface MS." In the storage shelf 100 of this disclosure, the threaded portion of the engaging member (including the second thread groove 221g) is rotated in the opposite direction to the tightening direction by the meshing of the gear 23r of the guide portion and the spur gear 222. This rotation causes the engaging member 22 to move toward the bottom of the object X in the first direction, and the engaging member 22 presses against the object X. As a result, rattling of the object X is suppressed and tipping of the object X is suppressed. Therefore, the storage shelf relating to this disclosure is more likely to prevent objects stored in the shelf from tipping over.

[0054] (Variation 1) For example, the object X may be a storage shelf 100. In this case, a part of the fixing structure 20 (the guide part 23 described above) is fixed to the bottom of the storage shelf 100, and a fixing member 21 is provided on the floor surface where the storage shelf 100 is placed.

[0055] (Modification 2) In the above disclosure, the main body 211 had an engagement hole 211h that opened in the +Z direction. Here, the main body 211 may have a boss that protrudes in the +Z direction instead of the engagement hole 211h. In this modified example, the boss has a first thread groove 211g around the Z direction. Because the boss has a first thread groove 211g around the Z direction, the fixing member 21 is a male thread.

[0056] (Variation 3) The fixing member 21 in the above disclosure may be an anchor. In the case of a male-threaded anchor, the engaging member 22 engages with the male-threaded portion. In this case, the fixing member 21 is female-threaded. In the case of a female-threaded anchor, the engaging member 22 engages with the female-threaded portion. In this case, the fixing member 21 is male-threaded.

[0057] <Second Embodiment> An embodiment of this disclosure will be described below with reference to the figures.

[0058] (composition) As shown in Figure 12, the fixing structure 20m comprises a fixing member 21m disposed on the mounting surface and including a first screw groove 211gm having a screw shaft Ax in the first direction; an engaging member 22m including a second screw groove 221gm that engages with the first screw groove 211gm and a spur gear 222m having a gear shaft in the first direction; and a guide portion 23m fixed to the bottom of the object in the first direction and having a linear toothed gear 23rm that meshes with the spur gear 222m.

[0059] (Mechanism of Action and Effects) In the fixing structure 20m of this disclosure, the meshing of the gear 23rm of the guide portion with the spur gear 222m causes the threaded portion of the engaging member 22m (the portion including the second thread groove 221gm) to rotate in the direction opposite to the tightening direction. This rotation causes the engaging member 22m to move toward the bottom of the object in the first direction, and the engaging member 22m presses against the object. As a result, rattling of the object installed on the mounting surface is suppressed, and tipping of the object X is suppressed. Therefore, the fixing structure relating to this disclosure is effective in preventing the object from tipping over.

[0060] <Third Embodiment> An embodiment of this disclosure will be described below with reference to the figures.

[0061] As shown in Figure 13, the fixing method includes the steps of: arranging a fixing member including a first screw groove having a screw shaft in the first direction on the mounting surface (step ST10m: step of arranging the fixing member on the mounting surface); preparing an engaging member including a second screw groove that engages with the first screw groove and a spur gear having a gear shaft in the first direction, and a guide part fixed to the bottom of the object in the first direction and having a linear tooth profile gear (step ST11m: step of preparation); and meshing the gear and the spur gear (step ST12m: step of meshing the gear and the spur gear).

[0062] (Mechanism of Action and Effects) According to the fixing method of this disclosure, the meshing of the gear of the guide portion with the spur gear causes the threaded portion of the engaging member (including the second thread groove) to rotate in the direction opposite to the tightening direction. This rotation causes the engaging member to move toward the bottom of the object in the first direction, and the engaging member presses against the object. As a result, rattling of the object installed on the mounting surface is suppressed, and tipping of the object is suppressed. Therefore, the fixing structure relating to this disclosure is effective in preventing the object from tipping over.

[0063] Although the present disclosure has been described above with reference to embodiments, the present disclosure is not limited to the embodiments described above. Various modifications to the structure and details of the present disclosure can be made as understandable to those skilled in the art within the scope of the present disclosure. Furthermore, each embodiment can be combined with other embodiments as appropriate.

[0064] Some or all of the above embodiments may also be described as follows, but are not limited to the following:

[0065] (Note 1) A fixing member disposed on the mounting surface and including a first screw groove having a screw shaft in the first direction, An engaging member including a second screw groove that engages with the first screw groove, and a spur gear having a gear shaft in the first direction, A guide portion fixed to the bottom of the object in the first direction and having a linear toothed gear that meshes with the spur gear, Equipped with, Fixed structure.

[0066] (Note 2) The guide portion further comprises a hook portion having a claw portion that expands toward the fixing member, In the hook portion, the gear is arranged The fixing structure described in Appendix 1.

[0067] (Note 3) The fixing member further comprises a flange portion having an axis in the first direction, The guide portion further includes a rail portion for introducing the fixing member to the hook portion from a second direction, The rail portion has an inclined portion that extends in an inclined manner such that it becomes smaller in the first direction as it approaches the fixing member. The second direction is a direction that intersects the first direction. The fixing structure described in Appendix 2.

[0068] (Note 4) The rail portion is arranged continuously with respect to the hook portion in the second direction, The hook portion has a stepped surface around the expanding portion of the claw portion, The flange portion is capable of contacting the stepped surface. The fixing structure described in Appendix 3.

[0069] (Note 5) The distance from the mounting surface to the first surface on the flange portion is defined as the first distance. When the distance from the mounting surface to the stepped surface is defined as the second distance, The aforementioned first distance is smaller than the aforementioned second distance. The first surface is the surface facing the mounting surface. The fixing structure described in Appendix 4.

[0070] (Note 6) The distance from the mounting surface to the second surface on the flange portion is defined as the third distance. When the distance from the mounting surface to the end of the linear tooth profile is defined as the fourth distance, The aforementioned third distance is smaller than the aforementioned fourth distance. The second surface is the surface located on the opposite side from the first surface. The fixing structure described in Appendix 5.

[0071] (Note 7) When viewed from the first direction, The tooth tips of the spur gear are positioned to overlap with the flange portion. The fixed structure described in any one of the appendices 3 through 6.

[0072] (Note 8) Further equipped with an elastic member, The elastic member is positioned between the spur gear and the bottom. A fixing structure as described in any one of the appendices 1 through 7.

[0073] (Note 9) A fixed structure described in any one of the appendices 1 to 8, A shelf having the aforementioned mounting surface, Equipped with, Storage shelf.

[0074] (Note 10) A step of arranging a fixing member, which includes a first screw groove having a screw shaft in the first direction, on a mounting surface, The steps include: preparing an engaging member including a second screw groove that engages with the first screw groove and a spur gear having a gear shaft in the first direction, and a guide portion fixed to the bottom of an object in the first direction and having a linear tooth profile gear; The steps of meshing the gear and the spur gear, including, Fixing method.

[0075] (Note 11) The guide portion further comprises a hook portion having a claw portion that expands toward the fixing member, In the hook portion, the gear is arranged The fixing method described in Appendix 10.

[0076] (Note 12) The fixing member further comprises a flange portion having an axis in the first direction, The guide portion further includes a rail portion for introducing the fixing member to the hook portion from a second direction, The rail portion has an inclined portion that extends in an inclined manner such that it becomes smaller in the first direction as it approaches the fixing member. The second direction is a direction that intersects the first direction. The fixing method described in Appendix 11.

[0077] (Note 13) The rail portion is arranged continuously with respect to the hook portion in the second direction, The hook portion has a stepped surface around the expanding portion of the claw portion, The flange portion is capable of contacting the stepped surface. The fixing method described in Appendix 12.

[0078] (Note 14) The distance from the mounting surface to the first surface on the flange portion is defined as the first distance. When the distance from the mounting surface to the stepped surface is defined as the second distance, The aforementioned first distance is smaller than the aforementioned second distance. The first surface is the surface facing the mounting surface. The fixing method described in Appendix 13.

[0079] (Note 15) The distance from the mounting surface to the second surface on the flange portion is defined as the third distance. When the distance from the mounting surface to the end of the linear tooth profile is defined as the fourth distance, The aforementioned third distance is smaller than the aforementioned fourth distance. The second surface is the surface located on the opposite side from the first surface. The fixing method described in Appendix 14.

[0080] (Note 16) When viewed from the first direction, The tooth tips of the spur gear are positioned to overlap with the flange portion. The fixing method described in any one of the appendices 12 to 15.

[0081] (Note 17) Further equipped with an elastic member, The elastic member is positioned between the spur gear and the bottom. The fixing method described in any one of the appendices 10 to 16. [Explanation of Symbols]

[0082] 100 storage shelves 10 shelves 20 Fixed structure 21 Fixing member 211 Main body 211h Engagement hole 211g First thread groove 212 Flange section 212a Front page 212b Second side 22 Engaging member 221 Main body 221g Second thread groove 222 Spur gear 23 Guide Section 231 Hook part 231c Claw part 231 cu counterbore 232 Rail section 232ap opening 232s slope section 23r gear 23s top surface 23sf step surface 23ss slope 24 Elastic members 20m fixed structure 21m fixing member 211gm First thread groove 22m Engaging Member 221gm Second thread groove 222m spur gear 23m guide section 23rm gear A1 First distance A2 Second distance A3 third distance A4 fourth distance Ax screw shaft MS mounting surface ROT1 First rotation direction ROT2 Second rotation direction ST Anti-tip device X Object X' Object Xm object

Claims

1. A fixing member disposed on the mounting surface and including a first screw groove having a screw shaft in the first direction, An engaging member including a second screw groove that engages with the first screw groove, and a spur gear having a gear shaft in the first direction, A guide portion fixed to the bottom of the object in the first direction and having a linear toothed gear that meshes with the spur gear, Equipped with, Fixed structure.

2. The guide portion further comprises a hook portion having a claw portion that expands toward the fixing member, In the hook portion, the gear is arranged The fixing structure according to claim 1.

3. The fixing member further comprises a flange portion having an axis in the first direction, The guide portion further includes a rail portion for introducing the fixing member to the hook portion from a second direction, The rail portion has an inclined portion that extends in an inclined manner such that it becomes smaller in the first direction as it approaches the fixing member. The second direction is a direction that intersects the first direction. The fixing structure according to claim 2.

4. The rail portion is arranged continuously with respect to the hook portion in the second direction, The hook portion has a stepped surface around the expanding portion of the claw portion, The flange portion is capable of contacting the stepped surface. The fixing structure according to claim 3.

5. The distance from the mounting surface to the first surface on the flange portion is defined as the first distance. When the distance from the mounting surface to the stepped surface is defined as the second distance, The aforementioned first distance is smaller than the aforementioned second distance. The first surface is the surface facing the mounting surface. The fixing structure according to claim 4.

6. The distance from the mounting surface to the second surface on the flange portion is defined as the third distance. When the distance from the mounting surface to the end of the linear tooth profile is defined as the fourth distance, The aforementioned third distance is smaller than the aforementioned fourth distance. The second surface is the surface located on the opposite side from the first surface. The fixing structure according to claim 5.

7. When viewed from the first direction, The tooth tips of the spur gear are positioned to overlap with the flange portion. The fixing structure according to claim 6.

8. Further equipped with an elastic member, The elastic member is positioned between the spur gear and the bottom. The fixing structure according to any one of claims 1 to 7.

9. A fixing structure according to any one of claims 1 to 7, A shelf having the aforementioned mounting surface, Equipped with, Storage shelf.

10. A step of arranging a fixing member, which includes a first screw groove having a screw shaft in the first direction, on a mounting surface, The steps include: preparing an engaging member including a second screw groove that engages with the first screw groove and a spur gear having a gear shaft in the first direction, and a guide portion fixed to the bottom of an object in the first direction and having a linear tooth profile gear; The steps of meshing the gear and the spur gear, including, Fixing method.

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