Rail for door roller traveling floor, and fitting

Abstract

To provide a rail for a door roller traveling floor in which an influence on surroundings due to changes in shape caused by temperature changes in an installation environment is suppressed, and a fitting.SOLUTION: In a rail 1 for a door roller traveling floor, a convex portion 5 includes a rounded quadrangular hole portion 12 having a rounded quadrangular shape that is long in a length direction DL. The rounded quadrangular hole portion 12 is in the form of a countersunk hole. The rounded quadrangular hole portion 12 includes: a pair of linear portions 16 parallel to each other at the center in the longitudinal direction DL; a pair of semicircular arc portions 18 connected to the linear portions 16; a pair of width-side truncated quadrangular pyramid side surfaces 20 constituted by surfaces in a width direction DW of a truncated quadrangular pyramid shape located on an inner lower side following the pair of linear portions 16; and a pair of semi-truncated conical side surfaces 22 constituted by semi-truncated conical surfaces located on the inner lower side following the semicircular arc portions 18 and connected to the width-side truncated quadrangular pyramid side surfaces 20.SELECTED DRAWING: Figure 1A

Description

[Technical Field]

[0001] The present invention relates to a rail for a door roller running floor, which has a running groove portion for running the door roller, a convex portion for holding the running groove portion, and an alignment inclined portion for aligning the convex portion with the floor surface, and to a building fixture which has such a rail for a door roller running floor. [Background technology]

[0002] The present applicant has been continuing research, development, and commercialization of rails for door roller running floors, and has disclosed the following technologies regarding rails for door roller running floors (see, for example, Patent Documents 1, 2, and 3). The door roller running floor rail according to Patent Document 1 is a door roller rail with a rail body thickness of 2.5 mm to 3.5 mm, which aims to solve the problems of thin rails. The door roller running floor rails according to Patent Documents 2 and 3 disclose single rail connecting members that connect multiple single floor rails, etc., which aim to solve the problems related to restrictions when transporting single floor rails. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 9-67974 [Patent Document 2] Patent Publication No. 2021-123990 [Patent Document 3] Patent Publication No. 2021-173128 Summary of the Invention [Problem to be solved by the invention]

[0004] These conventional techniques are recognized as effective techniques for solving the respective problems. However, in the course of developing a wide range of business related to door roller running floor rails, the applicant has discovered new problems related to door roller running floor rails. In particular, the applicant has found that as door roller running floor rails are made thinner and lighter, it becomes necessary to suppress the impact of temperature changes in the installation environment on their shape. The present invention was made in consideration of these circumstances, and aims to suppress the impact on the surrounding area of ​​shape changes due to temperature changes in the installation environment by arranging fixing holes in the convex parts that hold the running groove parts in the longitudinal direction in plan view, in rails for door roller running floors that are fixed to the floor surface, with rounded square hole parts that are long in the longitudinal direction when viewed from above. Another object of the present invention is to suppress the influence of temperature changes on fittings by providing fittings with the rail for a door roller running floor according to the present invention. [Means for solving the problem]

[0005] The rail for a door roller running floor of the present invention is a rail for a door roller running floor comprising: a running groove portion for running the door roller in the lengthwise direction; a pair of convex portions for holding both sides of the running groove portion in a widthwise direction intersecting the lengthwise direction; and a pair of alignment inclined portions for aligning the pair of convex portions with the floor surface, wherein the convex portions have a rounded square hole portion that is a rounded rectangle that is long in the lengthwise direction when viewed from above, and the rounded square hole portion is a countersunk hole that is connected to the floor surface, and the rounded square hole portion has, on the front side, a pair of straight portions that are parallel to each other in the center of the lengthwise direction, a pair of semicircular semicircular arc portions that are respectively connected to both ends of the straight portions, a pair of width-side quadrangular pyramid truncated side surfaces that are formed by the width-direction faces that are truncated inwardly and downstream from the pair of straight portions, and a pair of semicircular truncated side surfaces that are formed by semicircular truncated cone-shaped faces that are located inwardly and downstream from the semicircular arc portions and connected to the width-side quadrangular pyramid truncated side surfaces. Therefore, when the rail for the door roller running floor of the present invention expands or contracts in the longitudinal direction due to a change in environmental temperature, it is held in the fixed position before expansion or contraction by the rounded square hole countersunk head screw, so it is easy to suppress the impact on the surrounding area due to shape changes such as the rail for the door roller running floor floating up, which occurs when it is fixed only at the round hole portion, for example.

[0006] Furthermore, in one embodiment of the present invention, a rail for a door roller running floor has a round hole portion that is circular in plan view and is located away from the rounded square hole portion in the longitudinal direction, and the round hole portion is a countersunk hole that is connected to the floor surface, and the round hole portion has a truncated cone-shaped truncated cone side surface with a lower inner diameter that is smaller than the front inner diameter on the front side, and the pair of semi-frustum cone side surfaces are characterized in that when they are hypothetically combined, their shape matches that of the truncated cone side surface. Furthermore, in one embodiment of the present invention, when the rail for a door roller running floor is installed on the floor surface, the rounded square hole portion is covered like a lid by a flat washer having an outer periphery that is fitted into the upper front side along the width side truncated square pyramid side and the semicircular truncated cone side, and the washer has a secondary circular hole portion in the center that has a secondary truncated cone side that is shaped like a truncated cone and matches the shape of the round hole portion, and the circular hole portion is connected to the floor surface via a countersunk round hole screw that matches the truncated cone side, and the secondary circular hole portion is connected to the washer and the floor surface via a countersunk round hole screw that matches the secondary truncated cone side. In addition, in the rail for a door roller running floor according to one embodiment of the present invention, the washer is made of synthetic resin. In addition, in one embodiment of the rail for a door roller running floor of the present invention, the lower length of the rounded corners of the lower outer peripheral end of the washer in the longitudinal direction is characterized in that it is 1.5 to 2 times the lower diameter of the secondary round corners at the lower inner peripheral end of the secondary round hole portion. Furthermore, in one embodiment of the rail for a door roller running floor according to the present invention, the rail height of the convex portion relative to the floor surface is approximately 3 mm, the rail plate thickness is approximately 1 mm and is made of aluminum, the rail length in the longitudinal direction is approximately 1800 mm to 3500 mm, and the hole spacing from the center of the round hole portion to the center of the rounded square hole portion is approximately 300 mm to 400 mm.

[0007] In addition, the building fixture of the present invention is a building fixture comprising a door roller running floor rail installed on the floor surface and having a running groove portion for running a door roller in the longitudinal direction, and an opening and closing door equipped with the door roller, wherein the door roller running floor rail is a door roller running floor rail according to one embodiment of the present invention. Therefore, the fixture according to the present invention is a rail for a door roller running floor described in any one of the present embodiments, and therefore exhibits the same effects as the rail for a door roller running floor. [Effects of the Invention]

[0008] The rail for a door roller running floor according to the present invention comprises a round hole portion positioned with a countersunk head screw for a round hole, and a longitudinally long rounded square hole portion positioned at a position away from the round hole portion with a countersunk head screw for a rounded square hole. Therefore, when the rail expands or contracts in the longitudinal direction due to the influence of the ambient temperature, etc., the expansion or contraction (movement) can be easily absorbed within the allowable range in the longitudinal direction of the truncated pyramidal side face on the width side of the rounded square hole, and the effect of easily suppressing the impact on the surroundings due to shape changes such as lifting up can be achieved. Furthermore, since the rail for a door roller running floor according to the present invention is applied to the fitting according to the present invention, it achieves the same effects as those achieved by the rail for a door roller running floor. [Brief explanation of the drawings]

[0009] [Figure 1A] 1 is an overall plan view showing a door roller running floor rail according to an embodiment of the present invention as viewed from above, with the vertical direction in the drawing being the length direction and the horizontal direction being the width direction. [Figure 1B] 1 is an overall plan view showing another door roller running floor rail according to an embodiment of the present invention, viewed from above, with the vertical direction in the drawing being the length direction and the horizontal direction being the width direction. FIG. [Figure 2] FIG. 1C is a schematic diagram showing the end face of the rail for a door roller running floor shown in FIG. 1A and FIG. 1B, and also showing the configuration of a fixture according to an embodiment of the present invention as a fixture having an opening and closing door applied via a door roller to a rail for a door roller running floor installed on the floor surface. [Figure 3]1B is a schematic cross-sectional view showing the cross-sectional state of a round hole portion of the door roller running floor rail indicated by the arrow symbol SF3-SF3 in FIG. 1A. FIG. [Figure 4] 1B is a schematic cross-sectional view showing the cross-sectional state of a rounded square hole portion of the door roller running floor rail indicated by the arrow symbol SF4-SF4 in FIG. 1A. FIG. [Figure 5A] 1B is a schematic plan view showing the countersunk head screw for a round hole applied to the round hole shown in FIG. 1A as viewed from the front side of the convex portion. FIG. [Figure 5B] 5B is a schematic side view, partially in cross section, showing a state in which a round-hole flat head screw, indicated by the arrow symbol SF5B-SF5B in FIG. 5A, is applied to a round hole portion to fix a convex portion to a floor surface. FIG. [Figure 6A] 1C is a schematic plan view showing the outline of the state of the sub-round hole flat head screw applied to the rounded square hole shown in FIGS. 1A and 1B via a washer, as viewed from the front side of the convex portion. FIG. [Figure 6B] 6B is a schematic side view, partially in cross section, showing the state in which the countersunk head screw for a secondary round hole, indicated by the arrow symbol SF6B-SF6B in FIG. 6A, is applied to a rounded square hole portion to fix a convex portion to a floor surface. [Figure 7] 6B is a schematic side view, partially in cross section, showing the state in which the countersunk head screw for a secondary round hole, indicated by the arrow symbol SF7-SF7 in FIG. 6A, is applied to a rounded square hole portion to fix a convex portion to a floor surface. [Figure 8A] 6B is a schematic plan view showing the washer shown in FIG. 6A as viewed from above. FIG. [Figure 8B] 8B is a schematic side view showing the side surface in the length direction of the washer shown in FIG. 8A. FIG. [Figure 8C] 8C is a cross-sectional view showing a cross section in the length direction indicated by the arrow symbol SF8C-SF8C in FIG. 8A. [Figure 8D] 8B is a schematic side view showing the side surface in the width direction of the washer shown in FIG. 8A. FIG. [Figure 8E] 8E is a cross-sectional view showing a cross section in the width direction indicated by the arrow symbol SF8E-SF8E in FIG. 8A. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described with reference to the drawings (FIGS. 1A to 8E). 1A is an overall plan view showing a door roller running floor rail according to an embodiment of the present invention, as viewed from above, with the vertical direction in the drawing being the length direction and the horizontal direction being the width direction. Note that, because the dimensions of the width, round hole portion, and rounded square hole portion are extremely small compared to the length, the length direction of the door roller running floor rail is schematically shown in a reduced form by a two-dot chain line. 1B is an overall plan view showing another door roller running floor rail different from that shown in FIG. 1A according to an embodiment of the present invention, viewed from above, with the vertical direction in the drawing being the length direction and the horizontal direction being the width direction. Note that because the width and the dimensions of the rounded rectangular hole are extremely small compared to the length, the length direction of the door roller running floor rail is shown schematically in a reduced form with a two-dot chain line. Note that both ends in the length direction DL are omitted. 1A shows a configuration in which both a round hole portion 10 and a rounded square hole portion 12 coexist, whereas in Fig. 1B, there is no round hole portion 10 and the fixing is performed only by the rounded square hole portion 12. The configuration of the rounded square hole portion 12 is the same as in Fig. 1A, so the same reference numerals are used and redundant explanations will be omitted where appropriate. 1A and 1B, a plurality of rounded square holes 12 and a plurality of round holes 10 are arranged in the length direction DL at an appropriate hole interval LH. In this embodiment, in terms of the number in the length direction DL, one rounded square hole 12 and one round hole 10 are shown in FIG. 1A, and two rounded square holes 12 are shown in FIG. 1B, but they are repeatedly arranged at an appropriate interval in the length direction DL. In FIG. 1A, the round holes 10 and the rounded square holes 12 may be arranged alternately. 2 is a schematic diagram showing the end face of the rail for a door roller running floor shown in FIGS. 1A and 1B, and also shows the structure of a fitting according to an embodiment of the present invention as a fitting having an opening and closing door applied via a door roller to the rail for a door roller running floor installed on the floor surface. Note that in FIG. 2, the line drawings of the round hole portion 10 and the rounded square hole portion 12 are omitted for ease of viewing. FIG. 3 is a schematic cross-sectional view showing the cross-sectional state of a round hole portion of the door roller running floor rail indicated by the arrow symbol SF3-SF3 in FIG. 1A. Fig. 4 is a schematic cross-sectional view of the cross-section of the rounded square hole portion of the door roller running floor rail indicated by the arrow symbol SF4-SF4 in Fig. 1A. Note that the cross-section in the width direction of the rounded square hole portion indicated by the arrow symbol SF4L-SF4L in the figure is the same as in Fig. 3, so is not shown. FIG. 5A is a schematic plan view showing the countersunk head screw for a round hole applied to the round hole shown in FIG. 1A, as viewed from the front side of the convex portion. FIG. 5B is a schematic side view, partially in cross section, showing a state in which the round-hole flat head screw indicated by the arrow symbol SF5B-SF5B in FIG. 5A is applied to the round hole portion to fix the convex portion to the floor surface.

[0011] The rail 1 for a door roller running floor in this embodiment comprises a running groove portion 3 that allows the door roller 2 to run in the length direction DL, a pair of convex portions 5 that hold both sides of the running groove portion 3 in the width direction DW that intersects with the length direction DL, and a pair of alignment inclined portions 7 that align the pair of convex portions 5 with the floor surface 9. In the rail 1 for a door roller running floor (Figure 1B), the convex portion 5 has a rounded square hole portion 12 that is a rounded square that is long in the length direction DL in a plan view, and the rounded square hole portion 12 is a countersunk hole that is connected to the floor surface 9. On the front side, the rounded square hole portion 12 has a pair of straight lines 16 that are parallel to each other in the center of the length direction DL, a pair of semicircular arc portions 18 that are connected to both ends of the straight lines 16, a pair of width-side truncated square pyramid side surfaces 20 that are formed by truncated square pyramid-shaped surfaces in the width direction DW and located below and inward from the pair of straight lines 16, and a pair of semicircular truncated cone side surfaces 22 that are formed by semicircular truncated cone-shaped surfaces that are located below and inward from the semicircular arc portions 18 and connect to the width-side truncated square pyramid side surfaces 20. Therefore, when the rail 1 for the door roller running floor of the present invention expands or contracts in the longitudinal direction DL due to a change in environmental temperature, it is held in the fixed position before expansion or contraction by the rounded square hole countersunk head screw (not shown), so it is easy to suppress the impact on the surrounding area due to shape changes such as the rail 1 for the door roller running floor floating up, which occurs when it is fixed only by the round hole portion 10, for example.

[0012] The rounded square hole portion 12 has semicircular arc portions 18 at both ends configured to face inward and downward (toward the inner plate thickness), semicircular truncated cone side surfaces 22 of the semicircular truncated cone, and a central straight portion 16 configured to face inward and downward (toward the inner plate thickness) in the width direction DW, and a pair of semicircular truncated cone side surfaces 20 of the square truncated cone side surfaces 14 configured to face inward and downward (toward the inner plate thickness) in the width direction DW, and the pair of semicircular truncated cone side surfaces 22 positioned apart from the truncated cone side surfaces 14 match in shape with the truncated cone side surfaces 14 when they are virtually united excluding the straight portions 16. This makes it easy to maintain the allowable position of the door roller running floor rail 1 in the length direction DL by applying a rounded square hole countersunk head screw (not shown) of the same dimensions that functions similarly to the round hole countersunk head screw 42 (Fig. 5A) to the center of the straight portions 16 in the length direction DL. By using only the rounded square hole 12 to form the countersunk hole for connection to the floor surface 9, it becomes easier to reliably suppress the effects of changes in shape (particularly in the length direction DL) that accompany expansion and contraction of the door roller running floor rail 1. At the installation site, it may be preferable to use only the rounded square hole 12. When using only the rounded square hole 12, it is possible to avoid the restriction on the door roller running floor rail 1's ability to follow temperature changes that is caused by the round hole 10, and it becomes easier to improve the degree of freedom of expansion and contraction of the door roller running floor rail 1.

[0013] 1A shows an embodiment in which a round hole portion 10 is used in addition to the rounded square hole portion 12. As shown in FIG. 1A, the embodiment is not limited to the case where only the rounded square hole portion 12 is arranged (FIG. 1B), but the round hole portion 10 can be arranged in addition to the rounded square hole portion 12. That is, the rail 1 for a door roller running floor according to one embodiment of the present invention has a convex portion 5, which is located away from the rounded square hole portion 12 in the longitudinal direction DL and has a round hole portion 10 that is circular in a plan view, which is a countersunk hole that is connected to the floor surface 9, and which has a truncated cone-shaped truncated cone side surface 14 whose lower inner diameter 11d is smaller than the front inner diameter 11s on the front side, and it is preferable that the pair of semi-frustum cone side surfaces 22, when hypothetically combined, have a shape that matches the truncated cone side surface 14. The round hole portion 10 has a truncated cone side surface 14 that is larger on the front side and smaller on the bottom, so a round hole countersunk head screw 42 is used to specify the fixed position for positioning.

[0014] When the rail 1 for the door roller running floor expands or contracts in the length direction DL due to the influence of the ambient temperature, etc., by fixing the fixed position with one of the round hole flat head screws 42 and keeping the screw position fixed to the floor surface 9 on the other side of the rounded square hole flat head screw (not shown), the expansion and contraction (movement) of the rail 1 for the door roller running floor can be easily absorbed within the range of the length direction DL of the truncated pyramidal side surface 20 on the width side of the rounded square hole portion 12. Therefore, when the rail 1 for the door roller running floor expands or contracts in the longitudinal direction DL due to a change in environmental temperature, it is held in the fixed position before expansion or contraction by the rounded square hole countersunk head screw (not shown), making it easy to suppress the impact on the surrounding area caused by shape changes such as the rail 1 for the door roller running floor floating up, which occurs when it is fixed only at the round hole portion, for example.

[0015] In the rail 1 for the door roller running floor, the rail height H1 of the convex portion 5 relative to the floor surface 9 is approximately 3 mm, the rail plate thickness T1 is approximately 1 mm and is made of aluminum, the rail length L1 in the longitudinal direction DL is approximately 1700 mm to 3600 mm, and the hole spacing LH from the center of the round hole portion 10 to the center of the rounded square hole portion 12 is approximately 300 mm to 400 mm. In the thin and lightweight aluminum door roller running floor rail 1, which is approximately 3 mm high from the floor surface 9, the hole spacing LH from the center of the round hole portion 10 (or the rounded square hole portion 12) to the center of the rounded square hole portion 12 is approximately 300 mm to 400 mm, so even if elongation occurs due to an increase in environmental temperature, it is easy to prevent the door roller running floor rail 1 from lifting up from the floor surface 9. This makes it easy to reliably prevent the effects of elongation due to environmental temperature in the thin and lightweight door roller running floor rail 1.

[0016] A round hole 10 may be provided at the end of the door roller running floor rail 1, and in this case, the round hole end interval LM as the interval from the end to the round hole 10 is preferably approximately 50 mm. The dimensions of each part of the door roller running floor rail 1 in the width direction DW are as follows: in the case of a single groove, the rail width W1 is approximately 34 mm, the groove width W3 is approximately 4 mm, the convex portion width W5 is approximately 11 mm, and the slope width W7 is approximately 4 mm. In the case of multiple grooves, the rail width W1 is further increased. Such a thin and lightweight door roller running floor rail 1 is easily affected by the ambient temperature, and in particular, expansion due to temperature rise is likely to become noticeable. Furthermore, the dimension of the front inner diameter 11s on the front side of the round hole portion 10 is, for example, 5.7 mm, and the dimension of the lower inner diameter 11d is, for example, 3.2 mm, and the inclination angle of the middle truncated cone side surface 14 is open at 90 degrees upward (to the front side) (each inclined 45 degrees from the vertical).

[0017] The influence of the ambient temperature on the thin and lightweight door roller running floor rail 1 occurs as follows. The influence of the floor surface 9 on the installation state of the sash roller running floor rail 1 will be further described. The floor surface 9 on which the aluminum door roller running floor rail is installed is generally made of concrete or wood. Aluminum tends to expand on-site. In contrast, concrete and wood tend to shrink in a stable state after installation, and shrinkage of the floor surface 9 due to the expansion of aluminum was often observed on-site. Specifically, it was confirmed that when the door roller running floor rail 1 according to this embodiment was not applied, the aluminum rail, whose both ends were fixed, expanded relative to the floor surface 9, causing it to lift up from the floor surface 9.

[0018] The thermal expansion coefficient of aluminum is 23.6E-6, and the amount of expansion for a 1°C temperature change is approximately 0.024mm per 1000mm (source: Kaimei Copper Co., Ltd.). A 10°C temperature rise results in an expansion of 0.24mm per 1000mm. The drying shrinkage rate of concrete (concrete grade: standard) is 500 to 650E-6, and the amount of drying shrinkage is approximately 0.50 to 0.65 mm per 1000 mm (source: Japan Concrete Institute). While aluminum expands at 0.24 mm, concrete shrinks at 0.5 to 0.65 mm, and because they act in opposite directions, the relative misalignment is 0.74 to 0.89 mm per meter, and 1.48 to 1.78 mm per meter over 2 meters, resulting in an easily visible misalignment. This misalignment will appear as a lift in the middle of a thin, lightweight rail when both ends are fixed with fixing screws without applying the door roller running floor rail 1 according to this embodiment. The amount of shrinkage of wood (when drying) is approximately 16.0 mm per 1000 mm (source: Kamiya Sensei's DIY Furniture Class). Aluminum expands at 0.24 mm, while wood shrinks at 16 mm, and because they act in opposite directions, the relative positional deviation is 16.24 mm per meter, which is even greater than in the case of concrete.If the door roller running floor rail 1 of this embodiment is not used to address this, the middle part of the rail will lift up, so it is necessary to use the door roller running floor rail 1 to address this.

[0019] The fitting 60 according to this embodiment comprises a door roller running floor rail 1 installed on a floor surface 9 and having a running groove portion 3 for running door rollers 2 in the length direction DL, and an opening and closing door 62 equipped with the door rollers 2. The door roller running floor rail 1 is the door roller running floor rail 1 according to this embodiment. The fitting 60 includes the rail 1 for a sash roller running floor according to any one of the present embodiments, and therefore exhibits the same effects as those of the rail 1 for a sash roller running floor.

[0020] 1A to 5B, a case where the washer 30 is not applied to the rounded square hole 12 has been described. Next, an embodiment of the washer 30 applied to the rounded square hole 12 will be described. FIG. 6A is a schematic plan view showing an outline of the state in which the countersunk head screw for a sub-circular hole applied to the rounded square hole shown in FIGS. 1A and 1B via a washer is viewed from the front side of the convex portion. 6B is a schematic side view, partially in cross section, showing the state in which the countersunk head screw for a secondary round hole, indicated by the arrow symbol SF6B-SF6B in FIG. 6A, is applied to a rounded square hole portion to fix the convex portion to the floor surface. 7 is a schematic side view, partially in cross section, showing the state in which the countersunk head screw for a secondary round hole, indicated by the arrow SF7-SF7 in FIG. 6A, is applied to a rounded square hole to fix the convex portion to the floor surface. The exact shape of washer 30 is shown in more detail in FIGS. 8A to 8E. FIG. 8A is a schematic plan view showing the washer shown in FIG. 6A as viewed from above. FIG. 8B is a schematic side view showing the side surface in the length direction of the washer shown in FIG. 8A. FIG. 8C is a cross-sectional view showing a cross section in the length direction indicated by the arrow SF8C-SF8C in FIG. 8A. FIG. 8D is a schematic side view showing the side surface in the width direction of the washer shown in FIG. 8A. FIG. 8E is a cross-sectional view showing a cross section in the width direction indicated by the arrow SF8E-SF8E in FIG. 8A.

[0021] In the door roller running floor rail 1 according to this embodiment, when it is installed on the floor surface 9, the rounded square hole portion 12 is covered like a lid by a flat washer 30 having an outer peripheral portion 32 that is fitted into the upper front side along the width side truncated square pyramid side surface 20 and the semicircular truncated cone side surface 22. The washer 30 fitted to the rail 1 for the door roller running floor has a secondary circular hole portion 34 in the center having a secondary truncated cone side surface 36 that is shaped like a truncated cone and matches the shape of the circular hole portion 10, and the circular hole portion 10 is connected to the floor surface 9 via a secondary countersunk screw 42 that matches the secondary truncated cone side surface 14, and the secondary circular hole portion 34 is connected to the washer 30 and the floor surface 9 via a secondary countersunk screw 46 that matches the secondary truncated cone side surface 36.

[0022] When the door roller running floor rail 1 is installed on the floor surface 9, the rounded square hole 12 is covered at the top of the front side with a flat washer 30 having an outer periphery 32 that fits in and aligns with the width side truncated square pyramid side surface 20 and the semicircular truncated cone side surface 22. As a result, the rounded square hole 12 is covered with the washer 30, which makes it easier to prevent dust from accumulating. In the rail 1 for the door roller running floor, the round hole portion 10 is connected and fixed to the floor surface 9 via a round hole countersunk head screw 42, and the secondary round hole portion 34 of the washer 30 is connected and fixed to the washer 30 and the floor surface 9 via a secondary round hole countersunk head screw 46. As a result, the door roller running floor rail 1 is fixed by connecting the round hole portion 10 to the floor surface 9 via the round hole countersunk screw 42, and connecting the washer 30 and the rounded square hole portion 12 to the floor surface 9 via the secondary round hole countersunk screw 46. Furthermore, because the shapes of the round hole portion 10 (frustum cone side surface 14) and the secondary round hole portion 34 (secondary truncated cone side surface 36) match each other, the round hole countersunk screw 42 and the secondary round hole countersunk screw 46 have common dimensions, allowing for the sharing of parts. The rail 1 for the door roller running floor is fixed at a round hole portion 10 that specifies the fixed position, and when expansion and contraction occurs due to temperature changes, the displacement is absorbed in the length direction DL of the rounded square hole portion 12 into which a washer 30 located away from the round hole portion 10 is fitted, making it easy to prevent the rail 1 from floating up against the floor surface 9.

[0023] The washer 30 is preferably made of a synthetic resin. By using a synthetic resin, the washer 30 can be easily fitted into the rounded rectangular hole portion 12. In addition, the washer 30 can easily maintain its alignment in the length direction DL. The rounded lower length LCC of the lower outer peripheral end 32b of the washer 30 in the length direction DL is preferably 1.5 to 2 times the secondary rounded lower diameter Φs of the lower inner peripheral end 34b of the secondary round hole portion 34. The rounded lower length LCC of the lower outer peripheral end 32b of the washer 30 along the rounded square hole portion 12 is made 1.5 times the secondary rounded lower diameter Φs at the lower inner peripheral end 34b of the secondary rounded hole portion 34, making it easier to reliably secure the semicircular truncated cone side surfaces 22 facing each other in the length direction DL on both sides, and by making it up to twice the length, it is easier to prevent the rounded lower length LCC from becoming larger than necessary. [Industrial Applicability]

[0024] The present invention suppresses deformation of a thin and lightweight door roller running floor rail caused by changes in ambient temperature, and can therefore be effectively used industrially for the deployment of door roller running floor rails and for building fixtures that use door roller running floor rails. [Explanation of symbols]

[0025] 1. Rail for door roller running floor 2 door rollers 3 Running groove 5 Convex part 7 Alignment slope 9 Floor 10 Round hole 11s Table inner diameter 11d Lower inner diameter 12 Rounded square hole 14. Cone truncation side 16 Straight section 18 Semicircular arc section 20 Width side truncated pyramid side 22 Half-cone side 30 Washers 32 Outer periphery 32b Lower outer peripheral edge 34 Secondary round hole part 34b Lower inner edge 36 Sub-frustum side 42 Round hole flat head screw 46 Sub-round hole countersunk head screw 60 Building Materials 62 Opening and closing door DL Lengthwise DW Width direction H1 Rail height L1 Rail length LCC rounded corner bottom length LH hole spacing LM Round hole end spacing T1 Rail thickness W1 Rail width W3 Groove width W5 Convex width W7 Slope width φs: Sub-circle lower diameter

Claims

1. A door roller running floor rail comprising: a running groove portion for running a door roller in a lengthwise direction; a pair of convex portions for holding both sides of the running groove portion in a width direction intersecting with the lengthwise direction; and a pair of alignment inclined portions for aligning the pair of convex portions with a floor surface, The convex portion has a rounded rectangular hole portion that is elongated in the length direction in a plan view, The rounded rectangular hole portion is a countersink connected to the floor surface, The rounded square hole portion has, on the front side, a pair of straight line portions parallel to each other in the center in the length direction, a pair of semicircular arc portions connected to both ends of the straight line portions, a pair of width-side truncated square pyramid side surfaces formed by truncated square pyramid-shaped surfaces in the width direction located below and inwardly following the pair of straight line portions, and a pair of truncated semiconical side surfaces formed by truncated semiconical surfaces located below and inwardly following the semicircular arc portions and connected to the width-side truncated square pyramid side surfaces. A rail for door roller running floor.

2. The rail for a door roller running floor according to claim 1, the convex portion is located away from the rounded rectangular hole portion in the length direction and includes a round hole portion that is circular in a plan view, the round hole is a countersunk hole connected to the floor surface, the round hole portion has a truncated cone side surface having a lower inner diameter smaller than a front inner diameter on the front side, The pair of semi-frustum side surfaces are designed to match the shape of the truncated cone side surface when they are combined. A rail for door roller running floor.

3. The rail for a door roller running floor according to claim 1, When the base is installed on the floor, the rounded rectangular hole is covered with a flat washer having an outer periphery that is fitted into the upper portion of the front side along the side surface of the truncated quadrangular pyramid on the width side and the truncated semi-conical side, The washer has a secondary circular hole portion in the center, the secondary circular hole portion having a secondary circular truncated cone side surface that is shaped to match the circular hole portion, the round hole is connected to the floor surface via a countersunk head screw that matches the side surface of the truncated cone; The secondary circular hole portion is connected to the washer and the floor surface via a secondary circular hole countersunk head screw that matches the secondary truncated cone side surface. A rail for door roller running floor.

4. The rail for a door roller running floor according to claim 3, The washer is made of synthetic resin. A rail for door roller running floor.

5. The rail for a door roller running floor according to claim 3, The length of the rounded corners at the lower outer circumferential end of the washer in the length direction is 1.5 to 2 times the diameter of the rounded corners at the lower inner circumferential end of the secondary circular hole portion. A rail for door roller running floor.

6. The rail for a door roller running floor according to claim 1, The rail height of the convex portion relative to the floor surface is approximately 3 mm, and the rail plate thickness is approximately 1 mm and is made of aluminum. The rail length in the longitudinal direction is approximately 1800 mm to 3500 mm, and the hole interval from the center of the round hole to the center of the rounded square hole is approximately 300 mm to 400 mm. A rail for door roller running floor.

7. A door fitting comprising a door roller running floor rail installed on a floor surface and having a running groove portion for running a door roller in the length direction, and an opening and closing door having the door roller, A fitting, characterized in that the rail for a door roller running floor is the rail for a door roller running floor according to any one of claims 1 to 6.

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