Rail mounting suspension device

Abstract

To provide a rail mounting suspension device that can be securely and easily attached to a rail, has a simple structure, and has an inexpensive manufacturing cost.SOLUTION: A rail mounting suspension device comprises: a shaft in which a suspension section is attached to its lower end; an upper pressing member which is coaxially screwed onto the shaft at an upper end of the shaft; and a lower pressing member which is rotatably and coaxially attached to the shaft at the upper end of the shaft. The lower pressing member includes a protruding section that extends upward and can be fit into an opening of a rail installed in a structure. This protruding section has an inclined portion that presses the upper pressing member during tightening through the screwing between the upper pressing member and the shaft and causes an end face in a longitudinal direction of the upper pressing member to come into contact with an inner wall of the rail.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a rail mounting suspension device that is mounted to a rail such as an upper rail installed in a building structure. [Background technology]

[0002] Patent Document 1 describes a suspension device that can be installed on a ceiling rail installed on the ceiling of a building, in which a hook is provided at the lower end of a shaft on which a clothes hanger or other item can be hung, and a rectangular guide member is attached to the upper end of the shaft as a stopper. In this suspension device, the width and length of the rectangular guide member are set to a width that allows it to enter the opening passage of the ceiling rail and a length corresponding to the width of the hollow cavity inside the ceiling rail, and the rectangular guide member is inserted into the hollow cavity through the opening passage, and then rotated 90 degrees to engage with the upper surface of the opening. The rectangular guide member and the shaft are biased downward by a spring member, and the rectangular guide member engaged with the upper surface of the opening is pressed against the ceiling rail in this state to install the suspension device.

[0003] Patent Document 2 describes a suspension device in which a head provided at the upper end is fitted into a suspension rail, both side steps at the lower end of the head are engaged with engagement pieces of the suspension rail, and a fastener provided below the head is fastened to clamp and fix the engagement pieces between the fastener and the head from above and below. The head is formed so that the left and right width is smaller than the width of the opening of the suspension rail when viewed from the front, and larger than the width of the opening when viewed from the side. When fitting the head into the suspension rail, the suspension device is fitted into the suspension rail facing the front, and in that state is rotated 90 degrees so that the suspension device faces the side. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2008-119425 A [Patent Document 2] Utility Model Registration No. 3143112 Summary of the Invention [Problem to be solved by the invention]

[0005] By using the suspension devices described in Patent Documents 1 and 2, in top-hung sliding door systems where the door is often left open, or in partition systems where partitions are rarely used, the ceiling rails (suspension rails, upper rails) can be effectively used to attach the suspension devices.

[0006] However, with the conventional suspension device described in Patent Document 1, when the rectangular guide member acting as a stopper is inserted into the ceiling rail and rotated, the rectangular guide member does not face a direction perpendicular to the longitudinal direction of the ceiling rail, and there is a high possibility that the suspension device cannot be securely fixed to the ceiling rail. In addition, the suspension device described in Patent Document 1 requires the provision of a spring member that urges the rectangular guide member and the shaft downward, resulting in a complex structure and high manufacturing costs.

[0007] According to the conventional suspension device described in Patent Document 2, when the head is fitted inside the suspension rail and rotated, the head does not face a direction perpendicular to the longitudinal direction of the suspension rail, and there is a high possibility that the suspension device cannot be securely fixed to the ceiling rail. In addition, the suspension device described in Patent Document 2 requires fixing the suspension device by operating a fastener at a high position close to the suspension rail, so the fixing operation is not easy and it is not easy to attach it to the suspension rail.

[0008] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a rail-mounted suspension device that can be securely and easily attached to a rail installed on a building structure.

[0009] Another object of the present invention is to provide a rail-mounted suspension device that has a simple structure and is inexpensive to manufacture. [Means for solving the problem]

[0010] The rail mounting suspension device of the present invention comprises a shaft having a suspension part attached to its lower end, an upper press member that is screwed coaxially to the shaft at its upper end, and a lower press member that is coaxially attached to the shaft at its upper end so as to be freely rotatable relative to the shaft. The lower press member has a protruding part that protrudes upward and can be fitted into an opening in a rail provided in a building. The protruding part has an inclined part that presses the upper press member when the upper press member and the shaft are screwed together to tighten the upper press member, thereby causing the end face in the longitudinal direction of the upper press member to abut against the inner wall of the rail.

[0011] The protruding portion of the lower presser member fits into the opening of the rail, preventing the rotation of the lower presser member, making it easy to install the suspension device in the opening, and since the lower presser member does not rotate, there is no risk of damaging the surface of the rail. In particular, in the suspension device of the present invention, the protruding portion of the lower presser member has an inclined portion, which presses the upper presser member and abuts its end face in the longitudinal direction against the inner wall of the rail when the upper presser member and the shaft are screwed together to tighten the upper presser member, so that the upper presser member is always positioned in the appropriate direction and position when tightened, and the suspension device can be firmly, reliably, and easily installed on the rail. In addition, since the installation is performed by screwing the upper presser member and the shaft together without providing a spring member or the like, the structure is simple and the manufacturing cost is low. Furthermore, since the installation can be performed by simply rotating the shaft from below, there is no need to operate at a high position, and the suspension device can be installed on the rail very easily.

[0012] It is preferable that the lower press member has a base portion disposed below the opening of the rail, and a protrusion portion protruding upward from the base portion and capable of being fitted into the opening of the rail.

[0013] In this case, it is more preferable that the opening of the rail is sandwiched between the base of the lower holding member and the upper holding member by screwing and tightening the upper holding member onto the shaft. Since the upper holding member is screwed onto the shaft, when the shaft is rotated and the screw is tightened, the upper holding member moves (descends) in the axial direction of the shaft, thereby sandwiching the opening of the rail between the upper holding member and the lower holding member.

[0014] It is also preferable that the inclined portion of the lower press member is inclined downward in the axial direction.

[0015] It is also preferable that the shaft has a male thread portion fixed to the shaft at its axial center, and a female thread portion provided on the upper press member and meshing with the male thread portion.

[0016] It is also preferable that the upper and lower holding members each include a rotation preventing mechanism for preventing the upper holding member from rotating in one direction relative to the lower holding member.

[0017] In this case, it is preferable that the rotation prevention mechanism comprises a pair of protrusions provided on the outer periphery of the lower pressure member and a pair of cutout portions provided on the outer periphery of the upper pressure member, which respectively abut against the pair of protrusions.

[0018] It is also preferable that the upper press member is made of a flexible material having elasticity.

[0019] In this case, it is preferable that the upper press member is made of a rubber material.

[0020] It is also preferable that the lower press member is made of a material having rigidity. Effect of the Invention

[0021] According to the present invention, the protrusion of the lower presser member prevents the lower presser member from rotating, so that the suspension device can be easily attached to the opening, and since the lower presser member does not rotate, there is no risk of damaging the surface of the rail. When the upper presser member and the shaft are screwed together to be fastened, the inclined portion of the protrusion of the lower presser member presses the upper presser member to abut its end face in the longitudinal direction against the inner wall of the rail, so that the upper presser member is always positioned in the appropriate direction and position when fastened, and the suspension device can be securely, reliably, and easily attached to the rail. In addition, since the attachment is performed by screwing the upper presser member and the shaft without providing a spring member or the like, the structure is simple and the manufacturing cost is low. Furthermore, since the attachment can be performed by simply rotating the shaft from below, there is no need to operate at a high position, and the suspension device can be attached to the rail very easily. [Brief description of the drawings]

[0022] [Figure 1] 1 is a perspective view showing, in outline, the overall configuration of a rail mounting suspension device according to an embodiment of the present invention; [Diagram 2] 2 is a perspective view showing a schematic configuration of an upper presser member provided at the upper end of the rail mounting suspension device of FIG. 1. FIG. [Diagram 3] 2A, 2B, and 2C are schematic diagrams showing the configuration of an upper presser member provided at the upper end of the rail mounting suspension device of FIG. 1, in which (A) is a plan view, (B) is a front view, and (C) is a bottom view. [Figure 4] 2 is a perspective view showing a schematic configuration of a lower presser member provided at the upper end of the rail mounting suspension device of FIG. 1. FIG. [Diagram 5] 2A and 2B are plan and side views each showing a schematic configuration of a lower presser member provided at the upper end of the rail mounting suspension device of FIG. 1. [Figure 6] 2 is a perspective view showing a schematic configuration of an upper end portion of a shaft, an upper presser member, a lower presser member, and a male screw portion of the rail mounting suspension device of FIG. 1. FIG. [Figure 7]2 is a side view showing the upper end of the shaft, the upper pressure member, the lower pressure member, and the male thread portion of the rail mounting suspension device of FIG. 1, with the sides of the upper pressure member and the lower pressure member aligned. FIG. [Figure 8] 2 is a side view showing the upper end of the shaft, the upper pressure member, the lower pressure member, and the male thread portion of the rail mounting suspension device of FIG. 1, with the sides of the upper pressure member and the lower pressure member aligned. FIG. [Figure 9] 2 is a perspective view showing the configuration of the upper end of the shaft, the upper hold-down member, the lower hold-down member, and the male screw portion of the rail mounting suspension device of FIG. 1 together with the upper rail. FIG. [Figure 10] FIG. 10 is an enlarged perspective view of a portion of FIG. 9. [Figure 11] FIG. 13 is a perspective view showing the overall configuration of a rail mounting suspension device according to another embodiment of the present invention. [Figure 12] 12 is a perspective view showing a schematic configuration of an upper presser member provided at the upper end of the rail mounting suspension device of FIG. 11. FIG. [Figure 13] 12A, 12B, and 12C are schematic diagrams showing the configuration of an upper presser member provided at the upper end of the rail mounting suspension device of FIG. 11, in which FIG. [Figure 14] 12 is a perspective view showing a schematic configuration of a lower presser member provided at the upper end of the rail mounting suspension device of FIG. 11. FIG. [Figure 15] 12A and 12B are plan and side views each showing a schematic configuration of a lower presser member provided at the upper end of the rail mounting suspension device of FIG. 11. [Figure 16] 12 is a perspective view showing the schematic configuration of the shaft upper end portion, upper presser member, lower presser member, and male screw portion of the rail mounting suspension device of FIG. 11. FIG. [Figure 17] 12 is a side view showing the upper end of the shaft, the upper pressure member, the lower pressure member and the male thread portion of the rail mounting suspension device of FIG. 11 with the sides of the upper pressure member and the lower pressure member aligned. FIG. [Figure 18]12 is a side view showing the upper end of the shaft, the upper pressure member, the lower pressure member and the male thread portion of the rail mounting suspension device of FIG. 11 with the sides of the upper pressure member and the lower pressure member aligned. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] FIG. 1 is a perspective view showing the overall configuration of a rail mounting suspension device according to one embodiment of the present invention.

[0024] As shown in the figure, the rail mounting suspension device in this embodiment comprises a shaft 10, a suspension part 11 attached to the lower end of the shaft 10, an upper pressure member 12 screwed onto the shaft 10 and coaxially arranged at the upper end of the shaft 10, and a lower pressure member 13 coaxially arranged below the upper pressure member 12 at the upper end of the shaft 10 and freely rotatable relative to the shaft 10.

[0025] In this embodiment, the shaft 10 is made of a metal pipe or an ABS resin pipe whose surface is coated with a resin film, and is configured to be expandable and contractable in the axial direction as required by the coaxial sliding of the inner pipe and the outer pipe. A male screw portion 14 (see Figs. 6 to 9), which will be described later, is coaxially fixed to the shaft 10, and the male screw portion 14 is configured to rotate together with the rotation of the shaft 10. A disk-shaped support plate 10a is fixed to the upper end of the shaft 10 for placing and supporting the lower press member 13.

[0026] The hanging part 11 is composed of a clothesline ring, clothesline hook or other hanging device made of a resin or metal material, and this hanging device is fixed to the lower end of the shaft 10 so as to be freely rotatable around its axis.

[0027] FIG. 2 is a perspective view showing a schematic configuration of upper pressure member 12 provided at the upper end of the rail mounting suspension device in this embodiment, and FIG. 3 shows a schematic configuration of this upper pressure member 12 in (A) a plan view, (B) a front view, and (C) a bottom view.

[0028] As shown in these figures, the upper holding member 12 has an overall shape of a substantially rectangular parallelepiped, and its length is set according to the width of the inner wall 17b (see FIG. 9) of the upper rail 17 to be attached to the building. For example, the length of the upper holding member 12 is set to a value that is approximately equal to or slightly larger than the inner wall width. The width of the upper holding member 12 is set according to the width of the opening 17a (see FIG. 9) of the upper rail 17. For example, the width of the upper holding member 12 is set to a value that is approximately equal to or slightly smaller than the opening width. As a mere example, the upper holding member 12 in this embodiment has a length of 40.2 mm, a width of 9 mm, and a height (excluding the female thread portion) of 10 mm. One end 12a of both end faces in the length direction of the upper holding member 12 is rounded and a step portion 12b is formed in a notched state on the lower surface. A through hole 12c is formed in the center of the upper holding member 12, penetrating between the upper surface and the lower surface, and a female screw portion 12d is coaxially embedded in this through hole 12c. The female screw portion 12d is screwed into a male screw portion 14 coaxially fixed to the shaft 10. Therefore, the upper holding member 12 is screwed into the male screw portion 14 coaxially fixed to the shaft 10 by this female screw portion 12d, and is configured to move up and down in the axial direction along the male screw portion 14 by rotation of the shaft 10. The portion of the upper holding member 12 other than the female screw portion 12d is made of a flexible material having elasticity, which in this embodiment is a rubber material.

[0029] FIG. 4 is a perspective view showing a schematic configuration of a lower pressure member 13 provided at the upper end of the rail mounting suspension device in this embodiment, and FIG. 5 shows a schematic configuration of this lower pressure member 13 in (A) a plan view, (B) a front view, and (C) a bottom view.

[0030] As shown in these figures, the lower press member 13 has a disk-shaped base 13a having approximately the same diameter as the support plate 10a of the shaft 10, a pair of protruding parts 13b1 and 13b2 each having an approximately rectangular parallelepiped shape protruding upward from the base 13a and capable of being fitted into the opening 17a of the upper rail 17, and a through hole 13c provided in the center of the base 13a and through which the male screw part 14 rotatably passes. The pair of protruding parts 13b1 and 13b2 are each provided with a pair of inclined parts 13d1 and 13d2 inclined downward in the axial direction. The pair of protruding parts 13b1 and 13b2 are formed in a point-symmetric shape with respect to the central axis of the base 13a, and the width of each of the pair of protruding parts 13b1 and 13b2 is set according to the width of the opening 17a of the upper rail 17. For example, the width of each of the protrusions 13b1 and 13b2 is set to a value that is approximately equal to or slightly smaller than the width of the opening. As a mere example, in this embodiment, each of the pair of protrusions 13b1 or 13b2 has a width of 9 mm and a height of 3.7 mm, each of the pair of inclined parts 13d1 and 13d2 has a width of 4.5 mm, a horizontal length of 2.7 mm, and an inclination angle of 35° with respect to the horizontal, the base part 13a has a diameter of 30 mmφ, a thickness of 2 mm, and the through hole 13c has a diameter of 5.3 mmφ. The lower press member 13 is configured to be rotatable about the axis (male thread part 14) of the shaft 10, and is configured to be completely free to rotate about its own axis before the pair of protrusions 13b1 and 13b2 are fitted into the opening of the upper rail. When the pair of protrusions 13b1 and 13b2 fit into the opening 17a of the upper rail 17, the lower press member 13 is prevented from rotating relative to the upper rail 17. The lower press member 13 is made of a rigid material, which in this embodiment is a resin material.

[0031] When the shaft 10 is rotated to lower the upper holding member 12 toward the lower holding member 13, a pair of inclined portions 13d1 and 13d2 provided on a pair of protrusions 13b1 and 13b2 of the lower holding member 13 come into contact with and press the underside of the upper holding member 12, thereby causing the end face in the longitudinal direction of the upper holding member 12 to come into contact with the inner wall 17b (see FIG. 9) of the upper rail 17. This causes the upper holding member 12 to face in the appropriate direction, and the suspension device is securely attached to the upper rail 17.

[0032] Figures 6 to 8 are oblique views showing the upper end of shaft 10, upper pressure member 12, lower pressure member 13 and male screw portion 14 of the rail mounting suspension device of this embodiment, assembled together; Figure 9 is an oblique view showing the upper end of shaft 10, upper pressure member 12, lower pressure member 13 and male screw portion 14 of the rail mounting suspension device of this embodiment, mounted on upper rail 17; and Figure 10 is an oblique view showing an enlarged portion of Figure 9.

[0033] The configuration of the rail mounting suspension device in this embodiment will be explained in more detail below with reference to these figures, and its operation will be explained. In these figures, 15 indicates the lock pin of the male thread 14, 16 indicates a washer, 17 indicates the upper rail, 17a indicates the opening of the upper rail 17, and 17b indicates the inner wall of the upper rail 17.

[0034] The lower holding member 13 is placed coaxially on the support plate 10a at the upper end of the shaft 10 by inserting the male thread portion 14 into the through hole 13c, and the upper holding member 12 is placed coaxially on top of it by screwing the female thread portion 12d into the male thread portion 14. Furthermore, the upper holding member 12 is attached by passing a washer 16 through the male thread portion 14 and fitting a lock pin 15. As a result, the lower holding member 13 and the upper holding member 12 are coaxially attached to the upper end of the shaft 10.

[0035] To mount such a rail-mounted suspension device on the upper rail 17, first align the lower hold-down member 13 and the upper hold-down member 12 so that their sides are positioned on the same plane. This aligned state is shown in Figures 7 and 8.

[0036] Next, the shaft 10 is held and the pair of protrusions 13b1 and 13b2 of the upper hold-down member 12 and the lower hold-down member 13 of this rail mounting suspension device are fitted into the upper rail 17 through the opening 17a, and then the shaft 10 is rotated in a direction in which the male thread 14 is tightened (depending on the threading direction, but in this embodiment, which is a positive thread, it is clockwise as viewed from below) until the longitudinal end face of the upper hold-down member 12 is lightly abutted against the inner wall 17b of the upper rail 17. Next, the shaft 10 is further rotated to screw the male thread 14 into the female thread 12d of the upper hold-down member 12, thereby moving the upper hold-down member 12 axially downward. At this time, since the pair of protrusions 13b1 and 13b2 are fitted into the opening 17a of the upper rail 17, the lower holding member 13 does not rotate, and only the upper holding member 12 moves axially toward the lower holding member 13 (downward), and the opening 17a of the upper rail 17 is sandwiched between the upper holding member 12 and the lower holding member 13. During this sandwiching, the pair of inclined portions 13d1 and 13d2 provided on the pair of protrusions 13b1 and 13b2 of the lower holding member 13 abut against and press the lower surface 12e (see FIG. 10) of the upper holding member 12, so that the end surface in the length direction of the upper holding member 12 presses against and abuts against the inner wall 17b of the upper rail 17. As a result, the upper holding member 12 is fixed facing in an appropriate direction crossing the opening 17a, and the rail mounting hanging device is firmly and reliably attached to the upper rail 17 with a simple operation.

[0037] To remove the rail mounting suspension device from the upper rail 17, rotate the shaft 10 in the direction that loosens the male thread 14 (counterclockwise when viewed from below in this embodiment), and the upper presser member 12 moves axially upward, releasing the clamping. Since the pair of protrusions 13b1 and 13b2 prevent the lower presser member 13 from rotating, the mounting and removal processes for the opening 17a are easy, and furthermore, the lower presser member 13 can be prevented from damaging the surface of the upper rail 17.

[0038] As described above in detail, according to the rail mounting suspension device of this embodiment, the upper press member 12 is screwed to the shaft 10 by the male thread portion 14 and the female thread portion 12d, so that when the shaft 10 is rotated, the upper press member 12 moves axially in the shaft direction (downward), and thus the opening 17a of the upper rail 17 can be sandwiched between the upper press member 12 and the lower press member 13. Since the pair of protrusions 13b1 and 13b2 of the lower press member 13 are fitted into the opening 17a of the upper rail 17, the rotation of the lower press member 13 is suppressed when the shaft 10 is rotated as described above. This makes it easy to mount the lower press member 13 in the opening 17a, and since the lower press member 13 does not rotate, the surface of the upper rail 17 is not damaged. In addition, the pair of protrusions 13b1 and 13b2 have a pair of inclined portions 13d1 and 13d2, and these pair of inclined portions 13d1 and 13d2 press the upper presser member 12 and press and abut its end face in the length direction against the inner wall 17b of the upper rail 17 when the upper presser member 12 and the shaft 10 are screwed together to tighten the upper rail 17. Therefore, the upper presser member 12 is always positioned in the appropriate direction when tightened, and the rail mounting suspension device of this embodiment can be securely and reliably mounted on the upper rail 17. In addition, since the mounting is performed by screwing the upper presser member 12 and the shaft 10 without providing a spring member or the like, the structure is simple and the manufacturing cost is low. Furthermore, since the mounting can be performed only by rotating the shaft 10 from below, the mounting process of the rail mounting suspension device on the upper rail 17 is very easy.

[0039] FIG. 11 is a perspective view showing the overall configuration of a rail mounting suspension device in accordance with another embodiment of the present invention.

[0040] As shown in the figure, the rail mounting suspension device in this embodiment comprises a shaft 110, a suspension part 111 attached to the lower end of the shaft 110, an upper pressure member 112 screwed onto the shaft 110 and coaxially arranged at the upper end of the shaft 110, and a lower pressure member 113 arranged coaxially at the upper end of the shaft 110 below the upper pressure member 112 and freely rotatable relative to the shaft 110.

[0041] In this embodiment, the shaft 110 is made of a metal pipe or an ABS resin pipe whose surface is coated with a resin film, and is configured to be expandable and contractable in the axial direction as required by the coaxial sliding of the inner pipe and the outer pipe. A male screw portion 114 (see Figs. 16 to 18) described later is coaxially fixed to the shaft 110, and the male screw portion 114 is configured to rotate together with the rotation of the shaft 110. A disk-shaped support plate 110a is fixed to the upper end of the shaft 110 for placing and supporting the lower press member 113.

[0042] The hanging part 111 is composed of a clothesline ring, clothesline hook or other hanging device made of a resin or metal material, and this hanging device is fixed to the lower end of the shaft 110 so as to be freely rotatable around its axis.

[0043] FIG. 12 is a perspective view showing a schematic configuration of an upper presser member 112 provided at the upper end of the rail mounting suspension device in this embodiment, and FIG. 13 shows a schematic configuration of this upper presser member 112 in (A) a plan view, (B) a front view, and (C) a bottom view.

[0044] As shown in these figures, the upper hold-down member 112 has an overall shape of a roughly rectangular parallelepiped, and its length is set according to the width of the inner wall of the upper rail to which it is to be attached, which is provided in the building. For example, the length of the upper hold-down member 112 is set to a value that is roughly equal to or slightly larger than the inner wall width. The width of the upper hold-down member 112 is set according to the width of the opening of the upper rail. For example, the width of the upper hold-down member 112 is set to a value that is roughly equal to or slightly smaller than the opening width. As a mere example, the length of the upper hold-down member 112 in this embodiment is 40.2 mm, the width is 9 mm, and the height (excluding the female thread portion) is 10 mm. One end 112a of both longitudinal end faces of the upper holding member 112 is rounded, and a pair of notches 112b1 and 112b2 are formed on the outer periphery of the lower face to engage and abut with a pair of projections 113e1 and 113e2 (see Figs. 14 and 15) of the lower holding member 113 described later. A through hole 112c is formed in the center of the upper holding member 112, penetrating between its upper and lower faces, and a female screw portion 112d is coaxially embedded in this through hole 112c. The female screw portion 112d is screwed into a male screw portion 114 fixed coaxially to the shaft 110. Therefore, the upper holding member 112 is configured so that the female thread portion 112d screws into a male thread portion 114 that is coaxially fixed to the shaft 110, and moves up and down in the axial direction along the male thread portion 114 by rotation of the shaft 110. The portion of the upper holding member 112 other than the female thread portion 112d is formed of an elastic flexible material, which in this embodiment is a rubber material.

[0045] FIG. 14 is a perspective view showing a schematic configuration of a lower presser member 113 provided at the upper end of the rail mounting suspension device in this embodiment, and FIG. 15 shows a schematic configuration of this lower presser member 113 in (A) a plan view, (B) a front view, and (C) a bottom view.

[0046] As shown in these figures, the lower press member 113 has a base 113a in the shape of a circular disk having a diameter substantially equal to that of the support plate 110a of the shaft 110, a pair of protruding parts 113b1 and 113b2 each having a substantially rectangular parallelepiped shape protruding upward from the base 113a and capable of being fitted into the opening of the upper rail, and a through hole 113c provided in the center of the base 113a and through which the male screw part 114 rotatably passes. The pair of protruding parts 113b1 and 113b2 are each provided with a pair of inclined parts 113d1 and 113d2 inclined downward in the axial direction. The pair of protruding parts 113b1 and 113b2 are formed in a point-symmetrical shape with respect to the central axis of the base 113a, and the width of each of the pair of protruding parts 113b1 and 113b2 is set according to the width of the opening of the upper rail. For example, the width of each of the protrusions 113b1 and 113b2 is set to a value that is approximately equal to or slightly smaller than the width of the opening. A pair of projections 113e1 and 113e2 that protrude in the axial direction is provided on the outer periphery of the pair of protrusions 113b1 and 113b2, respectively. The pair of projections 113e1 and 113e2 are configured to engage with and abut on a pair of notches 112b1 and 112b2 provided on the outer periphery of the upper pressing member 112, respectively. As a mere example, in this embodiment, each of the pair of protrusions 113b1 or 113b2 has a width of 9 mm and a height of 8.5 mm, each of the pair of inclined portions 113d1 or 113d2 has a width of 4.5 mm, a horizontal length of 2.7 mm, an inclination angle of 35° with respect to the horizontal, the base portion 113a has a diameter of 30 mmφ, a thickness of 2 mm, and the through hole 113c has a diameter of 5.3 mmφ. The lower press member 113 is configured to be rotatable with respect to the axis (male thread portion 114) of the shaft 110, and is configured to be completely free to rotate with respect to its own axis before the pair of protrusions 113b1 and 113b2 are fitted into the opening of the upper rail. When the pair of protrusions 113b1 and 113b2 are fitted into the opening of the upper rail, the rotation of the lower press member 113 with respect to the upper rail is suppressed. The lower press member 113 is made of a material having rigidity, which in this embodiment is made of a resin material.

[0047] When the shaft 110 is rotated to lower the upper holding member 112 toward the lower holding member 113, a pair of inclined portions 113d1 and 113d2 provided on a pair of protrusions 113b1 and 113b2 of the lower holding member 113 abut against and press the underside of the upper holding member 112, thereby abutting the end face in the longitudinal direction of the upper holding member 112 against the inner wall of the upper rail. This causes the upper holding member 112 to face in the appropriate direction, and the suspension device is securely attached to the upper rail.

[0048] 16 to 18 are perspective views showing the upper end of shaft 110, upper hold down member 112, lower hold down member 113 and male thread portion 114 of the rail mounting suspension device in this embodiment, all assembled together.

[0049] The configuration of the rail mounting suspension device in this embodiment will be described in more detail below with reference to these figures, and its operation will be described below. In these figures, reference numeral 115 denotes a lock pin of the male thread portion 114, and reference numeral 116 denotes a washer.

[0050] The lower holding member 113 is placed coaxially on the support plate 110a at the upper end of the shaft 110 by inserting the male thread portion 114 into the through hole 113c, and the upper holding member 112 is placed coaxially on top of the lower holding member 113 by screwing the female thread portion 112d into the male thread portion 114. Furthermore, the upper holding member 112 is attached by passing a washer 116 through the male thread portion 114 and fitting a lock pin 115. As a result, the lower holding member 113 and the upper holding member 112 are coaxially attached to the upper end portion of the shaft 110.

[0051] To mount such a rail-mounted suspension device on an upper rail, first align the sides of the lower hold-down member 113 and the upper hold-down member 112 so that they are positioned on the same plane. This aligned state is shown in Figures 17 and 18.

[0052] Next, the shaft 110 is held and the pair of protrusions 113b1 and 113b2 of the upper hold-down member 112 and the lower hold-down member 113 of this rail mounting suspension device are fitted into the upper rail through the openings, and then the shaft 110 is rotated in a direction in which the male thread 114 is tightened (depending on the threading direction, but in this embodiment, which is a positive thread, it is clockwise as viewed from below) to lightly abut the longitudinal end face of the upper hold-down member 112 against the inner wall of the upper rail. Next, the shaft 110 is further rotated to screw the male thread 114 into the female thread 112d of the upper hold-down member 112, thereby moving the upper hold-down member 112 axially downward. At this time, since the pair of protrusions 113b1 and 113b2 are fitted into the opening of the upper rail, the lower holding member 113 does not rotate, and only the upper holding member 112 moves axially toward the lower holding member 113 (downward), and the opening of the upper rail is sandwiched between the upper holding member 112 and the lower holding member 113. During this sandwiching, the pair of inclined portions 113d1 and 113d2 provided on the pair of protrusions 113b1 and 113b2 of the lower holding member 113 abut against and press the lower surface of the upper holding member 112, so that the end surface in the length direction of the upper holding member 112 presses against and abuts against the inner wall of the upper rail. As a result, the upper holding member 112 is fixed facing in an appropriate direction across the opening, and the rail mounting hanging device is firmly and reliably attached to the upper rail 17 with a simple operation.

[0053] To remove the rail mounting suspension device from the upper rail, the shaft 110 is rotated in a direction that loosens the male screw portion 114 (counterclockwise as viewed from below in this embodiment), and the upper pressing member 112 moves axially upward, thereby releasing the clamping. At that time, the rotation prevention mechanism is activated. That is, the pair of protrusions 113e1 and 113e2 of the lower pressing member 113 abut against the pair of cutout portions 112b1 and 112b2 of the upper pressing member 112, respectively, and thus the rotation in one direction (counterclockwise as viewed from below) due to the co-rotation of the upper pressing member 112 is prevented. This makes it very easy to release the clamping. In addition, the pair of protrusions 113b1 and 113b2 prevent the lower pressing member 113 from rotating, making it easy to mount and remove the device from the opening, and further, the lower pressing member 113 is prevented from damaging the surface of the upper rail.

[0054] As described above in detail, according to the rail mounting suspension device of this embodiment, the upper press member 112 is screwed to the shaft 110 by the male thread portion 114 and the female thread portion 112d, so that when the shaft 110 is rotated, the upper press member 112 moves axially in the shaft direction (descending), and thus the opening of the upper rail can be sandwiched between the upper press member 112 and the lower press member 113. Since the pair of protrusions 113b1 and 113b2 of the lower press member 113 are fitted into the opening of the upper rail, the rotation of the lower press member 113 is suppressed when the shaft 110 is rotated as described above. This makes it easy to install in the opening, and since the lower press member 113 does not rotate, the surface of the upper rail is not damaged. In addition, the pair of protrusions 113b1 and 113b2 have a pair of inclined portions 113d1 and 113d2, and when the upper presser member 112 and the shaft 110 are screwed together to be fastened, the pair of inclined portions 113d1 and 113d2 press the upper presser member 112 to press and abut its end face in the length direction against the inner wall of the upper rail, so that the upper presser member 112 is always positioned in the appropriate direction when fastened, and the rail mounting suspension device of this embodiment can be securely and reliably mounted on the upper rail. In addition, since the mounting is performed by screwing the upper presser member 112 and the shaft 110 without providing a spring member or the like, the structure is simple and the manufacturing cost is low. Furthermore, since the mounting can be performed only by rotating the shaft 110 from below, the mounting process of the rail mounting suspension device to the upper rail is very easy. Furthermore, in this embodiment, when the rail mounting hanging device is removed from the upper rail, a pair of protrusions 113e1 and 113e2 of the lower pressure member 113 abut against a pair of cutout portions 112b1 and 112b2 of the upper pressure member 112, respectively, thereby preventing rotation in one direction (counterclockwise when viewed from below) due to co-rotation of the upper pressure member 112, making removal extremely easy.

[0055] The above-described embodiments are merely illustrative of the present invention, and are not limiting, and the present invention can be embodied in various other modified and altered forms. Therefore, the scope of the present invention is defined only by the claims and their equivalents. [Explanation of symbols]

[0056] 10, 110 Shaft 10a, 110a support plate 11, 111 Hanging part 12, 112 Upper holding member 13, 113 Lower holding member 14, 114 Male thread 12a, 112a one end 12b Step 12c, 13c, 112c, 113c through hole 12d, 112d female thread 12e Bottom 13a, 113a base 13b1, 13b2, 113b1, 113b2 protrusion 13d1, 13d2, 113d1, 113d2 sloped part 15, 115 Lock pin 16, 116 Washer 17 Top Rail 17a opening 17b Inner wall 112b1, 112b2 notch 113e1, 113e2 protrusion

Claims

1. The device comprises a shaft having a hanging portion attached to a lower end thereof, an upper press member that is coaxially screwed to the shaft at an upper end thereof, and a lower press member that is coaxially attached to the shaft at the upper end thereof so as to be freely rotatable relative to the shaft, The lower holding member has a protruding portion that protrudes upward and can be fitted into an opening of a rail provided in a building, A suspension device for rail mounting, characterized in that the protrusion has an inclined portion that presses the upper pressure member when the upper pressure member and the shaft are tightened by screwing them together, thereby abutting the longitudinal end face of the upper pressure member against the inner wall of the rail.

2. The rail mounting suspension device according to claim 1, characterized in that the lower pressure member has a base portion that is positioned below the opening in the rail, and a protrusion portion that protrudes upward from the base portion and can be inserted into the opening.

3. The rail mounting suspension device according to claim 2, characterized in that the opening of the rail is sandwiched between the base of the lower pressure member and the upper pressure member by tightening the upper pressure member by screwing it onto the shaft.

4. 2. The rail mounting suspension device according to claim 1, wherein the inclined portion of the lower press member is inclined downward in the axial direction.

5. 2. The rail mounting suspension device according to claim 1, further comprising: a male thread portion fixed to the shaft at the axial center of the shaft; and a female thread portion provided on the upper pressure member and screwed into the male thread portion.

6. 2. The rail mounting suspension device according to claim 1, wherein the upper and lower pressure members are provided with a rotation prevention mechanism that prevents the upper pressure member from rotating in one direction relative to the lower pressure member.

7. The rail mounting suspension device as described in claim 6, characterized in that the rotation prevention mechanism comprises a pair of protrusions provided on the outer periphery of the lower pressure member and a pair of cutout portions provided on the outer periphery of the upper pressure member, which respectively abut against the pair of protrusions.

8. 8. The rail mounting suspension device according to claim 1, wherein the upper press member is made of a flexible material having elasticity.

9. 9. The rail mounting suspension device according to claim 8, wherein the upper retaining member is made of a rubber material.

10. 8. The rail mounting suspension device according to claim 1, wherein the lower press member is made of a material having rigidity.

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