Fixing structure, storage shelf, and fixing method

Abstract

To provide a fixing structure, a storage shelf, and a fixing method that can easily prevent an object from falling over. [Solution] The fixing structure includes a fixing member arranged on the mounting surface and including a first screw groove having a screw axis in a first direction, an engaging member including a second screw groove engaging with the first screw groove and a spur gear having a gear axis in the first direction, and a guide portion fixed to the bottom of the object in the first direction and having a gear with a linear tooth profile that meshes with the spur gear.

Description

[Technical Field]

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

[0002] The fixing bracket fixed to the floor and the anti-tip bracket fixed to the object are fitted together to prevent the object from tipping over.

[0003] For example, Patent Document 1 discloses a cabinet equipped with "casters attached to the cabinet bottom plate, a pair of U-shaped reinforcing members (in front view) arranged to run in the front-rear direction on the lower part of the cabinet bottom plate, and anti-tip fittings attached to the underside of the cabinet bottom plate near each reinforcing member and having a head plate member below the vertical neck portion." The pair of fixing members in the cabinet have their rear ends close to the wall and perpendicular to the wall, and are installed and fixed to the floor so that they are parallel to the spacing between the pair of anti-tip fittings. The pair of fixing members includes a bottom plate member that rests on the floor and has a front-rear length approximately equal to the length of the reinforcing members of the cabinet, a pair of side plate members, a pair of top plate members, an engagement plate member, and a guide groove. The pair of side plate members are formed by bending the left and right side edges of the bottom plate member upward at a right angle. The pair of top plate members are formed by bending the upper edges of each side plate member inward at a right angle. The engagement plate member connects the rear portions of the pair of upper plate members so that a predetermined upper surface coincides with the upper surface of the upper plate member. The guide groove is tapered so that it widens toward the front, and the neck portion of the anti-tip fitting is pressed into the guide groove. When the anti-tip fitting of the cabinet is fitted into the engagement plate member, the predetermined upper surface of one of the upper plate members comes into close contact with the lower surface of the reinforcing member, and the top plate member is fixed to the reinforcing member with bolts. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 6-13591 Summary of the Invention [Problem to be solved by the invention]

[0005] In the cabinet installation structure disclosed in Patent Document 1, an anti-tip fitting fixed to the cabinet is fitted into an engagement 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 member, it may be difficult to secure enough space to place a tool. In such cases, it becomes difficult to tighten the bolts using a tool, making it difficult to prevent the object from tipping over.

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

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

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

[0009] The fixing structure, storage shelf, and fixing method according to the present disclosure make it easier to prevent objects from falling over. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view illustrating an example of a storage shelf according to the present disclosure. [Figure 2] 1 is a perspective view showing a part of the configuration of a storage shelf according to the present disclosure. [Figure 3] 1 is a perspective view I showing a part of the configuration of a fixing structure according to the present disclosure. [Figure 4] 2 is a perspective view II showing a part of the configuration of the fixing structure according to the present disclosure. FIG. [Figure 5] 1 is a perspective view I showing an example of a fixing structure according to the present disclosure. [Figure 6] FIG. 2 is a plan view showing a part of the configuration of a fixing structure according to the present disclosure. [Figure 7] 3 is a perspective view III showing a part of the configuration of the fixing structure according to the present disclosure. [Figure 8] FIG. 2 is a partially enlarged view of a portion of the configuration of a fixing structure according to the present disclosure. [Figure 9] 10A-10C illustrate a series of operations in a fixed structure according to the present disclosure. [Figure 10] 1 is a flowchart I showing an example of a process of a fixing method according to the present disclosure. [Figure 11] FIG. 10 is a perspective view showing an example of a fixing structure in a comparative example. [Figure 12] 2 is a perspective view II showing an example of a fixing structure according to the present disclosure. FIG. [Figure 13] 10 is a flowchart II showing an example of a process of a fixing method according to the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, each embodiment of the present disclosure will be described with reference to the drawings. Note that the drawings and specific configurations used in each embodiment should not be used to interpret the disclosure. The same or corresponding configurations in all drawings will be assigned the same reference numerals, and common descriptions will be omitted. It should be noted that in this disclosure, the drawings may relate to one or more embodiments.

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

[0013] Hereinafter, the axial direction of the screw axis AX of the first screw groove 211g included in the fixing member 21 will be referred to as the Z direction. The direction that intersects with the Z direction and in which the fixing member 21 is introduced into the hook portion 231 will be referred to as the Y direction. The direction that intersects with the Z direction and the Y direction will be referred to as the X direction. One of the X directions will be referred to as the +X direction, and the other of the X directions will be referred to as the -X direction. One of the Y directions will be referred to as the +Y direction, and the other of the Y directions will be referred to as the -Y direction. One of the Z directions will be referred to as the +Z direction, and the other of the Z directions will be referred to as the -Z direction.

[0014] For example, the X, Y, and Z directions may be perpendicular to one another. 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 used for the convenience of explanation and do not limit the direction in which the fixing member 21 is disposed.

[0016] (Storage shelf configuration) The storage shelf 100 is used to install device housings such as information processing devices. An example of the storage shelf 100 is a server rack. The device housing is an example of an "object." As shown in FIG. 1-2, the storage shelf 100 includes a shelf 10 and one or more (e.g., a plurality of) fixing structures 20. A part of the fixing structure 20 (a guide portion 23 described below) is fixed to the bottom of the object X. For example, the object X is the above-mentioned device housing. For example, the object X in the present disclosure is prevented from tipping over by two fixing structures 20. Therefore, as shown in FIG. 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 when there are a plurality of fixing structures 20 required to prevent the object X from tipping over, the guide portions 23 are not limited to being arranged in the same straight line.

[0017] For example, the storage shelf 100 in the present disclosure stores a plurality of objects Xm using a plurality of fixing members 21m. The plurality of fixing members 21m includes a plurality of fixing members 21 described below, and the plurality of objects Xm includes a plurality of objects X. The shelf 10 has a mounting surface MS for arranging the fixing members 21 of the fixing structure 20. For example, in the present disclosure, a large number of fixing members 21 are arranged on the mounting surface MS. Note that, when 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 the same straight line.

[0018] (Outline of the fixed structure) 5, in the fixing structure 20 of the present 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 rattle of the object X and prevents the object X from tipping over. Note that if the rotation direction when the threaded portion (portion including the second screw groove 221g) of the engaging member 22 is tightened relative to the fixing member 21 is defined as a first rotation direction ROT1, when the guide portion 23 is introduced toward the fixing member 21, a force is applied to the engaging member 22 in a direction opposite to the first rotation direction ROT1 (hereinafter also referred to as a "second rotation direction ROT2"). (Fixed structure configuration) As shown in FIG. 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 gel. The elastic member 24 is disposed between a spur gear 222 (described later) and the bottom of the object in the first direction. For example, the elastic member 24 in the present disclosure is mounted on the spur gear 222.

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

[0020] The main body 211 is a columnar member extending in the Z direction and having a predetermined cross-sectional shape such as a cylindrical shape, a rectangular shape, or another shape. The main body 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 the present disclosure, since the inner circumferential surface of the engagement hole 211h has the first screw groove 211g, the fixing member 21 is an internal thread.

[0021] The flange portion 212 is capable of coming into contact with a stepped surface 23sf (described later). The flange portion 212 has an axis in a first direction. For example, the axis of the flange portion 212 in the present 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 faces the mounting surface MS. The second surface 212b is located on the opposite side of the first surface 212a. The second surface 212b faces the spur gear 222 (see FIGS. 5 and 6).

[0022] (Configuration of Engagement Member) 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 that includes the second screw groove 221g may be either an internal thread or an external thread. For example, the engagement member 22 includes a main body 221 and a spur gear 222 .

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

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

[0025] (Guide section configuration) 5 and 7-8, the guide portion 23 has a gear 23r with a linear tooth profile 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 portion 23 includes a hook portion 231 and one or two rail portions 232. The rail portions 232 are aligned continuously with the hook portions 231 in the second direction.

[0026] The hook portion 231 clamps the fixing member 21 introduced from a second direction (for example, the Y direction) intersecting 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 FIGS. 7-8 , a countersunk portion 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). The gear 23r is disposed on the side peripheral surface of the countersunk portion 231cu formed in the hook portion 231. The gear 23r is disposed so that, when meshing with the spur gear 222, it rotates the engaging member 22 in the second rotation direction ROT2. For example, if the engaging member 22 has a reverse thread, the gear 23r is located on the −X direction side of the side peripheral surface of the countersunk portion 231cu. For example, if the engaging member 22 has a positive thread, the gear 23r is located on the +X direction side of the side peripheral surface of the countersunk portion 231cu.

[0027] The rail portion 232 guides the fixing member 21 into the hook portion 231 from a second direction (e.g., the Y direction) that intersects with the first direction. For example, the rail portions 232 in the present disclosure are provided on both the left and right sides of the claw portion 231c. The rail portions 232 have an opening angle with respect to the second direction.

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

[0029] 3-4 again, when viewed from the first direction (for example, the Z direction), the guide portion 23 is located within the lower surface area of ​​the target object X. This reduces the occupied floor area required for installing the target 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 a first distance A1 and the distance from the mounting surface MS to the step surface 23sf is defined as a second distance A2, the first distance A1 is smaller than the second distance A2.

[0031] 9, when viewed from the Z direction, the tooth tips of the spur gear 222 are positioned so as to overlap with the flange portion 212. In other words, when viewed from the Z direction, the tooth tips of the spur gear 222 are positioned 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 a third distance A3 and the distance from the mounting surface MS to the end of the gear 23r is a fourth distance A4, 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 peripheral surfaces of the countersunk portion 231cu in a third direction (e.g., the X direction) that intersects the first and second directions. In addition, the outer dimension of the main body portion 211 is slightly smaller than the distance between the two surfaces of the expanded portion of the claw portion 231c in the third direction. This makes it easier for the rail portion 232 to guide the fixing member 21 to the appropriate position in the hook portion 231. Furthermore, the diameter of the cutting edge circle of the spur gear 222 in the third direction 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 peripheral surface of the counterbore 231cu.

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

[0035] (Operation of the engagement member 22) In Figure 9, the upper part shows a plan view of the guide portion 23 being introduced toward the fixed member 21 from a predetermined direction (e.g., the Y direction), and the lower part shows a partial cross-sectional view of the same state as seen from the side. The process in which the engaging member 22 rises in the +Z direction and presses against the bottom of the object X will be described in detail below.

[0036] 9(9-1), after the flange portion 212 climbs up onto the inclined portion 232s, the guide portion 23 moves so that the fixing member 21 moves relatively to the deepest part of the expanded portion. At this time, since the rail portion 232 has an expansion angle with respect to the second direction, when the first surface 212a of the flange portion 212 is introduced while being in contact with the inclined surface 23ss, the fixing member 21 moves relatively toward the claw portion 231c.

[0037] As shown in (9-2) to (9-4) of FIG. 9, when the fixing member 21 moves relative to the deepest part of the expanded portion, the spur gear 222 meshes with the gear 23r. As the fixing member 21 continues to move relative to the innermost part, the spur gear 222 rotates in the second rotation direction ROT2. As the spur gear 222 rotates, the threaded portion (portion including the second screw groove 221g) of the engaging member 22 rotates in the second rotation direction ROT2. The rotation in the second rotation direction ROT2 causes the engaging member 22 to rise in the +Z direction. After rising by a predetermined amount, the spur gear 222 placed on the engaging member 22 presses against the bottom of the object X via the elastic member 24.

[0038] When the fixing member 21 climbs onto the step surface 23sf, the fixing member 21 presses the hook portion in 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 a fixing method according to the present disclosure will be described below with reference to FIG.

[0040] First, the worker places a fixing member including a first screw groove 211g having a screw axis in a first direction on the mounting surface MS (step ST10: step of placing a fixing member on a mounting surface).

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

[0042] Next, the worker meshes the gear 23r with the spur gear 222 (step ST12: a step of meshing a gear with a spur gear). Here, the gear 23r of the guide portion engages with the spur gear 222, causing the threaded portion of the engaging member (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. (End)

[0043] (Action and effect) The fixing structure 20 of this embodiment includes a fixing member 21 disposed on a mounting surface MS and including a first screw groove 211g having a screw axis Ax in a first direction; an engaging member 22 including a second screw groove 221g engaging with the first screw groove 211g and a spur gear 222 having a gear axis in the first direction; and a guide unit 23 fixed to a bottom portion of the object X in the first direction and including a gear 23r with a linear tooth profile that meshes with the spur gear 222. The gear 23r of the guide unit meshes with the spur gear 222, causing the threaded portion of the engaging member 22 (the portion including the second screw groove 221g) to rotate in the direction opposite to the fastening direction. This rotation moves the engaging member 22 toward the bottom portion of the object X in the first direction, and the engaging member 22 presses against the object X. This suppresses rattle of the object X placed on the mounting surface MS, and prevents the object X from tipping over. Therefore, the fixing structure according to the present disclosure is likely to prevent the object from falling over.

[0044] Here, as a comparative example, consider an object X' that has a tip-prevention device ST at its bottom. As shown in Fig. 11, the tip-prevention device ST is a sheet metal member having two bend lines. When the tip-prevention device ST shown in Fig. 11 is provided at the bottom of the object X', the tip-prevention device ST requires an area larger than the underside area of ​​the object X'.

[0045] In contrast, the fixing structure according to the present disclosure requires only an area equal to the area of ​​the underside of the object X as the area required for the fixing structure 20. Therefore, when setting the object X in a limited space such as a server rack, it is not necessary to provide space for the fall prevention device ST.

[0046] In addition to the above configuration, in the fixing structure 20 of the present disclosure, "the guide portion 23 further includes a hook portion 231 having a claw portion 231c that widens toward the fixing member 21, and the gear 23r is disposed in the hook portion 231," so that the fixing member 21 is clamped by the claw portion 231c, and the engagement member 22 is pressed by the meshing of the gear 23r and the spur gear 222. Therefore, an effect can be obtained that "when the engagement member 22 presses the object X, the fixing member 21 is easily fixed."

[0047] Additionally, in the fixing structure 20 of the present disclosure, "the fixing member 21 further includes a flange portion 212 having an axis in the first direction, and the guide portion 23 further includes a rail portion 232 that introduces the fixing member 21 into the hook portion 231 from the second direction, and the rail portion 232 has an inclined portion 232s that extends at an angle that becomes smaller in the first direction as it approaches the fixing member 21, and the second direction is a direction that intersects the first direction," so that when the flange portion 212 is introduced while remaining in contact with the inclined portion 232s, the fixing member 21 moves relatively toward the claw portion 231c. Therefore, an effect can also be obtained in which "the rail portion 232 can guide the fixing member 21 to an appropriate position in the hook portion 231."

[0048] Additionally, in the fixing structure 20 of the present disclosure, "the rail portions 232 are arranged continuously in the second direction relative to the hook portions 231, the hook portions 231 have step surfaces 23sf around the widened portions of the claw portions 231c, and the flange portions 212 are contactable with the step surfaces 23sf," so that when the engaging member 22 presses against the object X, the flange portions 212 come into contact with the step surfaces 23sf, increasing the surface pressure between the flange portions 212 and the hook portions 231. This also provides the effect of "reducing rattling of the hook portions 231 on the mounting surface MS, thereby further reducing tipping of the object." This effect is further enhanced when the weight of the object X is smaller than a predetermined value relative to the force with which the engaging member 22 presses against the object X.

[0049] In addition, the fixing structure 20 of the present 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 the first distance A1 and the distance from the mounting surface MS to the step surface 23sf is 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 the present disclosure, the flange portion 212 presses the hook portion 231 toward the mounting surface MS via the step surface 23sf, thereby suppressing rattle of the hook portion 231 on the mounting surface MS, thereby further suppressing the object from tipping over.

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

[0051] Furthermore, in the fixing structure 20 of the present disclosure, "when viewed from the first direction, the tooth tip of the spur gear 222 is positioned so as to overlap with the flange portion 212," which also has the effect of "preventing wear of the spur gear 222 due to contact with the hook portion 231."

[0052] Furthermore, the fixing structure 20 of the present disclosure "further includes an elastic member 24, which is disposed between the spur gear 222 and the bottom," thereby achieving the effect of "reducing vibrations transmitted to the object X via the mounting surface MS, and / or making it easier to protect the bottom of the object X."

[0053] Furthermore, the storage shelf 100 of the present disclosure has the following effects by "being provided with the above-described fixing structure 20 and a shelf having a mounting surface MS." In the storage shelf 100 of the present disclosure, the gear 23r of the guide portion engages with the spur gear 222, causing the threaded portion of the engaging member (the portion 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. This prevents the object X from rattling and tipping over. Therefore, the storage shelf according to the present disclosure is more likely to prevent objects stored in the storage 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 above-mentioned guide part 23) is fixed to the bottom of the storage shelf 100, and a fixing member 21 is disposed on the floor surface on which the storage shelf 100 is to be placed.

[0055] (Variation 2) In the above disclosure, the main body 211 has an engagement hole 211h that opens 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. The boss in this modification has a first screw groove 211g around the periphery in the Z direction. Because the boss has the first screw groove 211g around the periphery in the Z direction, the fixing member 21 is a male screw.

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

[0057] Second Embodiment Hereinafter, an embodiment according to the present disclosure will be described with reference to the drawings.

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

[0059] (Action and effect) In the fixing structure 20m of the present disclosure, the gear 23rm of the guide portion engages with the spur gear 222m, causing the threaded portion of the engaging member 22m (the portion including the second thread groove 221gm) to rotate in the direction opposite to the fastening 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. This prevents the object placed on the mounting surface from rattling, and prevents the object X from tipping over. Therefore, the fixing structure according to the present disclosure is likely to prevent the object from falling over.

[0060] Third Embodiment Hereinafter, an embodiment according to the present disclosure will be described with reference to the drawings.

[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 axis in a first direction on a mounting surface (step ST10m: step of arranging a fixing member 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 axis in the first direction; and a guide part that is fixed to the bottom of the object in the first direction and has a gear with a linear tooth profile (step ST11m: step of preparing); and meshing the gear with the spur gear (step ST12m: step of meshing the gear with the spur gear).

[0062] (Action and effect) According to the fixing method of the present disclosure, the gear of the guide portion engages with the spur gear, causing the threaded portion of the engaging member (the portion 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. This reduces rattle of the object placed on the mounting surface and prevents the object from tipping over. Therefore, the fixing structure according to the present disclosure is likely to prevent the object from falling over.

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

[0064] A part or all of the above-described embodiments can be described as, but not limited to, the following supplementary notes.

[0065] (Appendix 1) a fixing member disposed on the mounting surface and including a first screw groove having a screw axis 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 axis in the first direction; a guide portion fixed to a bottom portion of the object in the first direction and having a gear with a linear tooth profile that meshes with the spur gear; Equipped with Fixed structure.

[0066] (Appendix 2) The guide portion further includes a hook portion having a claw portion that opens toward the fixing member, The gear is disposed in the hook portion. A fixing structure as described in Appendix 1.

[0067] (Appendix 3) The fixing member further includes a flange portion having an axis in the first direction, the guide portion further includes a rail portion that guides the fixing member into the hook portion from a second direction, the rail portion has an inclined portion that extends at an inclination that decreases in the first direction toward the fixing member, The second direction is a direction intersecting the first direction. A fixing structure as described in Appendix 2.

[0068] (Appendix 4) The rail portions are aligned continuously with the hook portions in the second direction, The hook portion has a stepped surface around the expanded portion of the claw portion, The flange portion is capable of contacting the step surface. A fixing structure as described in Appendix 3.

[0069] (Appendix 5) a distance from the mounting surface to a first surface of the flange portion is a first distance; When the distance from the mounting surface to the step surface is defined as a second distance, the first distance is less than the second distance; The first surface faces the mounting surface. A fixing structure as described in Appendix 4.

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

[0071] (Appendix 7) When viewed from the first direction, The tooth tip of the spur gear is positioned so as to overlap the flange portion. 7. A fixing structure according to any one of claims 3 to 6.

[0072] (Appendix 8) Further comprising an elastic member, The elastic member is disposed between the spur gear and the bottom portion. 8. A fastening structure according to any one of clauses 1 to 7.

[0073] (Appendix 9) A fixing structure according to any one of appendices 1 to 8; a shelf having the mounting surface; Equipped with Storage shelf.

[0074] (Appendix 10) disposing a fastening member on a mounting surface, the fastening member including a first thread groove having a thread axis in a first direction; a step of preparing an engaging member including a spur gear having a gear axis in the first direction and a second screw groove that engages with the first screw groove; and a guide part fixed to a bottom part of an object in the first direction and having a gear with a linear tooth profile; meshing the gear with the spur gear; Including, Fixing method.

[0075] (Appendix 11) The guide portion further includes a hook portion having a claw portion that opens toward the fixing member, The gear is disposed in the hook portion. Fixation method described in Appendix 10.

[0076] (Appendix 12) The fixing member further includes a flange portion having an axis in the first direction, the guide portion further includes a rail portion that guides the fixing member into the hook portion from a second direction, the rail portion has an inclined portion that extends at an inclination that decreases in the first direction toward the fixing member, The second direction is a direction intersecting the first direction. Fixation method described in Appendix 11.

[0077] (Appendix 13) The rail portions are aligned continuously with the hook portions in the second direction, The hook portion has a stepped surface around the expanded portion of the claw portion, The flange portion is capable of contacting the step surface. Fixation method described in Appendix 12.

[0078] (Appendix 14) a distance from the mounting surface to a first surface of the flange portion is a first distance; When the distance from the mounting surface to the step surface is defined as a second distance, the first distance is less than the second distance; The first surface faces the mounting surface. Fixation method described in Appendix 13.

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

[0080] (Appendix 16) When viewed from the first direction, The tooth tip of the spur gear is positioned so as to overlap the flange portion. 16. The fixation method according to any one of claims 12 to 15.

[0081] (Appendix 17) Further comprising an elastic member, The elastic member is disposed between the spur gear and the bottom portion. 17. The fixation method according to any one of 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 screw groove 212 Flange 212a Front page 212b Second side 22 Engagement member 221 Main body 221g Second screw groove 222 Spur gear 23 Guide section 231 Hook part 231c Claw part 231cu countersunk 232 Rail section 232ap opening 232s slope section 23r gear 23s top surface 23sf step surface 23ss slope 24 Elastic member 20m fixed structure 21m fixed member 211gm First groove 22m engaging member 221gm Second screw 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 Fall prevention equipment 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 axis 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 axis in the first direction; a guide portion fixed to a bottom portion of the object in the first direction and having a gear with a linear tooth profile that meshes with the spur gear; Equipped with the guide portion includes a hook portion having a claw portion that expands toward the fixing member, and a rail portion that guides the fixing member into the hook portion from a second direction that intersects with the first direction, the rail portion includes an inclined portion that is continuously aligned with the hook portion in the second direction and extends at an inclination that becomes smaller in the first direction toward the fixing member, The hook portion has a stepped surface around the expanded portion of the claw portion, The gear is disposed on the hook portion, the fixing member includes a flange portion having an axis in the first direction, The flange portion is capable of contacting the step surface. Fixed structure.

2. a distance from the mounting surface to a first surface of the flange portion is a first distance; When the distance from the mounting surface to the step surface is defined as a second distance, the first distance is less than the second distance; The first surface faces the mounting surface. The fixing structure according to claim 1 .

3. a third distance is a distance from the mounting surface to a second surface of the flange portion; When the distance from the mounting surface to the end of the linear tooth profile is defined as a fourth distance, the third distance is smaller than the fourth distance; The second surface is a surface located opposite to the first surface. The fixing structure according to claim 2 .

4. When viewed from the first direction, The tooth tip of the spur gear is positioned so as to overlap the flange portion. The fixing structure according to claim 3 .

5. Further comprising an elastic member, The elastic member is disposed between the spur gear and the bottom portion. A fixing structure according to any one of claims 1 to 4.

6. A fixing structure according to any one of claims 1 to 4; a shelf having the mounting surface; Equipped with Storage shelf.

7. disposing a fastening member on a mounting surface, the fastening member including a first thread groove having a thread axis in a first direction; a step of preparing an engaging member including a spur gear having a gear axis in the first direction and a second screw groove that engages with the first screw groove; and a guide part fixed to a bottom part of an object in the first direction and having a gear with a linear tooth profile; meshing the gear with the spur gear; Including, the guide portion includes a hook portion having a claw portion that expands toward the fixing member, and a rail portion that guides the fixing member into the hook portion from a second direction that intersects with the first direction, the rail portion includes an inclined portion that is continuously aligned with the hook portion in the second direction and extends at an inclination that becomes smaller in the first direction toward the fixing member, The hook portion has a stepped surface around the expanded portion of the claw portion, The gear is disposed on the hook portion, the fixing member includes a flange portion having an axis in the first direction, The flange portion is capable of contacting the step surface. Fixing method.

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