Center pillar fixation apparatus

Abstract

To provide a center pillar fixation apparatus which suppresses debris or the like from entering and accumulating inside through holes for receiving rods as possible.SOLUTION: A lid element consists of: an upper side 90 shorter than longitudinal dimensions of an opening; a first sagging side 91 and a second sagging side 92 sagging from a longitudinal end part of the upper side 90 or the vicinity of the end part; and a first lower side 93 and a second lower side 94 extending in a direction away from each other from lower ends of the first sagging side 91 and the second sagging side 92. In a state where the lid element is fitted to a recessed part 8, the first lower side 93 and the second lower side 94 are abutted against a bottom part 84, the first lower side 93 is abutted against a lower end part of a first wall 80, the second lower side 94 is abutted against a lower end part of a second wall 81, and a first hole part 71 and a second hole part 72 to be inserted with center pillar fixing rods adjacently to longitudinal both ends of the upper side 90 of the lid element are formed on the recessed part 8.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a center pillar fixing device. [Background technology]

[0002] A center post is used when multiple shutters are used to open and close a large opening. The center post has guides on the sides to guide the ends of the shutter curtains, and the rod of the lifting and lowering fittings installed at the bottom end of the facing part is dropped into a center post fixing tray buried in a specified position in the ground, thereby fixing the center post at a specified position in the width direction of the opening (Patent Document 1).

[0003] Since such a center column fixing tray has a hole for receiving the rod, over time, if debris gets in through the hole and accumulates inside, it may hinder the rod's downward movement and cause the center column to become poorly fixed. [Patent Document 1] Patent Publication No. 2022-55258 DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0004] The present invention aims to prevent as much as possible the intrusion and accumulation of debris into a center pillar fixing device through a hole that receives a rod. [Means for solving the problem]

[0005] The technical means adopted in the present invention to solve such problems are as follows: A center column fixing device in which a center column fixing rod is received in a recess provided in a floor surface through a slot-shaped opening formed at the upper end of the recess, The recess includes a first wall and a second wall extending downward from short edges of the longitudinal ends of the opening, and a bottom, A lid element is removably attached to the recess, The lid element includes an upper side that is shorter than the longitudinal dimension of the opening, a first hanging side and a second hanging side that hang down from an end or a vicinity of an end in the longitudinal direction of the upper side, and a first lower end portion and a second lower end portion that extend in a direction away from each other from lower ends of the first hanging side and the second hanging side, When the lid element is attached to the recess, the first lower end portion and the second lower end portion abut the bottom portion, the first lower end portion abuts the lower end portion of the first wall, and the second lower end portion abuts the lower end portion of the second wall. The recess is formed with holes adjacent to both longitudinal ends of the upper side of the lid element into which a center column fixing rod is inserted. This is the center column fixing device.

[0006] In one embodiment, the dimension between the tip of the first lower end portion and the tip of the second lower end portion of the lid element is greater than the longitudinal dimension of the recess; The lid element is removably attached to the recess by elastic deformation.

[0007] In one embodiment, the lid element includes the upper side, the first hanging side and the second hanging side, a first lower side located at a lower end of the first hanging side and abutting the bottom portion, and a second lower side located at a lower end of the second hanging side and abutting the bottom portion, The lid element is configured so that, due to the elastic force in the expansion direction of the first hanging edge and the second hanging edge, the tip of the first lower edge abuts against the lower end of the first wall and the tip of the second lower edge abuts against the lower end of the second wall.

[0008] In one embodiment, the recess includes a third wall and a fourth wall extending downward from a long edge of the opening; a first hole portion into which a first center pillar fixing rod is inserted is formed in a space surrounded by the first wall, the first hanging side, the first bottom side, and one end of the third wall and the fourth wall; A second hole portion into which a second center pillar fixing rod is inserted is formed in the space surrounded by the second wall, the second hanging edge, the second bottom edge, and the other ends of the third wall and the fourth wall.

[0009] In one embodiment, in a state where a center column fixing rod is inserted into the hole formed adjacent to both ends of the upper side of the lid element in the longitudinal direction, The distance between one of the center column fixing rods and the first wall is smaller than the distance between the one of the center column fixing rods and the first hanging side, The distance between the other center pillar fixing rod and the second wall is smaller than the distance between the other center pillar fixing rod and the second hanging side. In this way, if the center column is biased in the left-right direction when fixed, when one center column fixing rod abuts against the first wall, the other center column fixing rod is spaced away from the second hanging edge, and when the other center column fixing rod abuts against the second wall, one center column fixing rod is spaced away from the first hanging edge, thereby preventing the center column fixing rods from abutting against the lid element.

[0010] Another technical means adopted by the present invention is a cover element removably mounted on a longitudinal recess of the center column fixing device, The lid element includes an upper side, a first hanging side and a second hanging side hanging from a longitudinal end or a vicinity of the end of the upper side, and a first lower side and a second lower side extending in a direction away from each other from lower ends of the first hanging side and the second hanging side, The longitudinal dimension of the upper side is shorter than the longitudinal dimension of the recessed portion, A dimension between the tip of the first bottom side and the tip of the second bottom side is equal to or greater than a longitudinal dimension of the recess, The height dimension of the lid element is approximately the same as the depth of the recess; The short dimension of the lid element is approximately the same as the short dimension of the recess; A lid element. Effect of the Invention

[0011] In the present invention, in a center column fixing device in which a center column fixing rod is received into a recess through a long hole-shaped opening (receiving hole) formed at the upper end of a recess provided in a floor surface, a cover element is removably attached to the recess to close the long opening that receives the center column fixing rod, leaving only the portion that receives the center column fixing rod, thereby narrowing the area of ​​the opening (receiving hole) at the upper end of the recess and preventing the intrusion of debris. The dimension between the tip of the first lower end portion and the tip of the second lower end portion of the lid element is larger than the longitudinal dimension of the recess, and the lid element is removably attached to the recess by elastic deformation, so that the lid element can be easily attached and detached from the recess and there is no rattling of the lid element attached to the recess.

[0012] By removing the lid element from the recess, the inside of the recess can be cleaned, and at this time, the lid element can be used as a tool for scraping out dirt from inside the recess. [Brief description of the drawings]

[0013] [Figure 1] FIG. 2 is a front view of the dual lightweight shutter according to the embodiment. [Diagram 2] FIG. 2 is a vertical cross-sectional view of the twin lightweight shutter according to the embodiment. [Diagram 3] FIG. 2 is a partial enlarged view of the lower end portion of the center pillar in FIG. [Figure 4] 1A and 1B are a plan view and cross-sectional views from two different directions of a center pillar fixing device equipped with a lid element according to a first embodiment of the present invention; [Diagram 5] FIG. 2 is a diagram showing a lid element according to the first embodiment. [Figure 6] 1A is a diagram showing the positional relationship between a center column fixing rod and a hole in a center column fixing device equipped with a lid element according to the first embodiment. FIG. [Figure 7] 1A to 1C are diagrams illustrating the attachment of a lid element to a recess in a center pillar fixing device provided with a lid element according to the first embodiment. [Figure 8] 5A to 5C are diagrams illustrating scraping out dirt accumulated in a recess using the lid element according to the first embodiment. [Figure 9]FIG. 11 is a diagram showing a modified example of the center pillar fixing device having a lid element according to the first embodiment. [Figure 10] 13A and 13B are a plan view and cross-sectional views from two different directions of a center pillar fixing device equipped with a lid element according to a second embodiment of the present invention. [Figure 11] FIG. 11 is a diagram showing a lid element according to a second embodiment. [Figure 12] FIG. 13 shows a lid element according to yet another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] [A] Dual-mounted lightweight shutter The shutter device according to this embodiment is a double-attached lightweight shutter. FIG. 1 is a front view of the double-attached lightweight shutter, which opens and closes a building opening with a first shutter curtain 1 and a second shutter curtain 2. A first guide rail 3 and a second guide rail 4 are erected at both ends of the building opening in the width direction, and a center post 5 is provided in the center of the building opening in the width direction. The center post 5 has a first facing portion 50, a second facing portion 51, and left and right side portions 52, which are substantially rectangular in cross section, and each side portion 52 has a guide groove 53 formed in the height direction. A lifting and dropping metal fitting 6 is provided below the first facing portion 50 of the center post 5. A center post fixing device that fixes the lower end portion of the center post 5 using the lifting and dropping metal fitting 6 is buried in a predetermined portion of the floor surface or ground FL.

[0015] The lifting / dropping fitting 6 includes a lifting / dropping rod formed in an inverted U shape by left and right center column fixing rods 60, 60 and an upper gripping portion 61, and a case 62 that supports the lifting / dropping rod so that it can move up and down. The lifting / dropping rod is movable up and down between an upper position (unlocked state) when the center column is not fixed, and a lower position (locked state) when the center column is fixed. In Figs. 1 to 3, the lifting / dropping rod (center column fixing rod 60) is in the lower position, and the center column 5 is fixed by the center column fixing device.

[0016] By installing and fixing the center pillar 5 in a predetermined position, the building opening is divided into a first opening and a second opening, and the first shutter curtain 1 opens and closes the first opening by raising and lowering one widthwise end guided by the first guide rail 3 and the other widthwise end guided by one guide groove 53 of the center pillar 5, and the second shutter curtain 2 opens and closes the second opening by raising and lowering one widthwise end guided by the second guide rail 4 and the other widthwise end guided by the other guide groove 53 of the center pillar 5.

[0017] [B] Middle pillar fixing device [B-1] Overall configuration The center-column fixing device according to this embodiment includes a plate 7 in which a long-hole-shaped receiving hole 70 extending in the opening width direction is formed, and a recess 8 formed on the lower surface of the plate 7 with the receiving hole 70 as the opening at the upper end, and is embedded below the building opening so that the upper surface of the plate 7 coincides with the floor surface or the ground surface FL. A lid element 9 is detachably attached to the recess 8, and when the center column is fixed, a center-column fixing rod 60 is received in a space formed between the lid element 9 and the recess 8. The lid element 9 closes the long-shaped opening at the upper end of the recess 8, leaving only the portion (first hole portion 71, second hole portion 72) that receives the center-column fixing rod 60. Although the material of the plate 7, the recess 8, and the lid element 9 is not limited, in this embodiment, the plate 7, the recess 8, and the lid element 9 are all made of metal (for example, steel or stainless steel). The lid element 9 may also be made of resin. The lid element 9 according to this embodiment is formed by bending a narrow metal piece, and is elastically deformable.

[0018] 4, the recess 8 includes a first wall 80 and a second wall 81 extending downward from short edges of the longitudinal ends of the opening, a third wall 82 and a fourth wall 83 extending downward from long edges of the opening, and a bottom 84. In this embodiment, the recess 8 is fixed to the plate 7 by welding the bent pieces at the upper ends of the plate materials forming the third wall 82 and the fourth wall 83 of the recess 8 to the lower surface of the plate 7 while abutting them against the lower surface of the plate 7, and by welding the upper ends of the first wall 80 and the second wall 81 to the lower surface of the plate 7. Positioning abutment portions 73 for a pair of center posts 5 are protrudingly provided on the upper surface of the plate 7 adjacent to the receiving holes 70.

[0019] The width of the receiving hole 70 in the short-side direction is a little larger than the diameter of the center column fixing rod 60, and when the center column fixing rod 60 is received, there is a clearance (clearance between the receiving hole 70 and the center column fixing rod 60) that does not affect the fixing of the center column. The indoor / outdoor dimensions of the first hole portion 71 and the second hole portion 72 formed in the recess 8 by providing the cover element 9 are determined by the short-side dimension of the receiving hole 70. The first wall 80 and the second wall 81 of the recess 8 according to this embodiment are vertical walls extending perpendicularly to the plate 7, while the third wall 82 and the fourth wall 83 of the recess 8 extend downward and continuously while gradually separating from each other until they reach the bottom 84. That is, the third wall 82 and the fourth wall 83 of the recess 8 are inclined planes that extend downward in a spreading manner in a side view, and the recess 8 is formed into a substantially trapezoidal shape in a side view from the inclined third wall 82 and the fourth wall 83 and the horizontal bottom 84.

[0020] The lid element 9 comprises an upper side 90 shorter than the longitudinal dimension of the opening (receiving hole 70), a first hanging side 91 and a second hanging side 92 hanging down from a longitudinal end or the vicinity of the end of the upper side 90, and a first lower end portion and a second lower end portion extending in a direction away from each other from the lower ends of the first hanging side 91 and the second hanging side 92, and when the lid element 9 is attached to the recess 8, the first lower end portion and the second lower end portion abut against the bottom 84, the first lower end portion abuts against the lower end portion of the first wall 80, and the second lower end portion abuts against the lower end portion of the second wall 81. In the illustrated embodiment, the first hanging side 91 and the second hanging side 92 of the lid element 9 hang down from the end of the upper side 90, but the first hanging side and the second hanging side may hang down from the vicinity of the end while leaving an extra end (a portion protruding outward from the corner) at the end of the upper side. In this embodiment, the dimension between the tip of the first lower end portion and the tip of the second lower end portion of the lid element 9 is larger than the longitudinal dimension of the recess 8, and the lid element 9 is detachably attached to the recess 8 by elastic deformation. There are several modes (FIGS. 5, 11, 12) for the shapes of the first and second lower end portions of the lid element 9, and the details of these will be described later.

[0021] By attaching the lid element 9 to the recess 8, holes into which the center pillar fixing rods 60 are inserted are formed in the recess 8 adjacent to both longitudinal ends of the upper side 90 of the lid element 9. More specifically, a first hole 71 into which the first center pillar fixing rod 60 is inserted is formed between the first wall 80 of the recess 8 and the first hanging side 91 of the lid element 9, and a second hole 72 into which the second center pillar fixing rod 60 is inserted is formed between the second wall 81 of the recess 8 and the second hanging side 92 of the lid element 9.

[0022] [B-2] Center column fixing device equipped with the lid element according to the first embodiment 5, the lid element 9 comprises an upper side 90 that is shorter than the longitudinal dimension of the opening, a first hanging side 91 and a second hanging side 92 that hang down from a longitudinal end of the upper side 90, and a first lower side 93 and a second lower side 94 that extend in directions away from each other from the lower ends of the first hanging side 91 and the second hanging side 92. The upper side 90, the first lower side 93, and the second lower side 94 extend horizontally.

[0023] The dimension between the tip of the first lower edge 93 and the tip of the second lower edge 94 of the lid element 9 is slightly larger than the longitudinal dimension of the recess 8, and when the lid element 9 is attached to the recess 8, the first lower edge 93 and the second lower edge 94 abut against the bottom 84 of the recess 8, and due to the elastic force in the expansion direction of the first depending edge 91 and the second depending edge 92, the tip of the first lower edge 93 abuts against the lower end of the first wall 80 and the tip of the second lower edge 94 abuts against the lower end of the second wall 81.

[0024] When the lid element 9 is attached to the recess 8, a first hole portion 71 through which the first center pillar fixing rod 60 is inserted is formed in the space surrounded by the first wall 80 of the recess 8, the first hanging edge 91 and the first bottom edge 93 of the lid element 9, and one end of the third wall 82 and the fourth wall 83 of the recess 8, and a second hole portion 72 through which the second center pillar fixing rod 60 is inserted is formed in the space surrounded by the second wall 81 of the recess 8, the second hanging edge 92 and the second bottom edge 94 of the lid element 9, and the other end of the third wall 82 and the fourth wall 83 of the recess 8.

[0025] 6 is a diagram showing the positional relationship between the first center column fixing rod 60 in the lower position and the first hole portion 71, and the positional relationship between the second center column fixing rod 60 and the second hole portion 72. The positional relationship shown in the upper diagram of FIG. 6 is the positional relationship as designed for the center column fixing device, and shows the fixed position of the center column fixing rod 60 with respect to the first hole portion 71 and the second hole portion 72.

[0026] In the upper diagram of FIG. 6, when the first center post fixing rod 60 is inserted into the first hole portion 71, the distance α between the side surface of the first center post fixing rod 60 and the first wall 80 of the recess 8 is smaller than the distance β between the side surface of the first center post fixing rod 60 and the first hanging edge 91 of the lid element 9, and when the second center post fixing rod 60 is inserted into the second hole portion 72, the distance α between the side surface of the second center post fixing rod 60 and the second wall 81 of the recess 8 is smaller than the distance β between the side surface of the second center post fixing rod 60 and the second hanging edge 92 of the lid element 9.

[0027] The lower diagram of Fig. 6 shows a case where the center post 5 is shifted in the width direction when the center post is fixed. The distance between the first center post fixing rod 60 and the second center post fixing rod 60 is constant, and as shown in the figure, when the center post 5 is shifted to the right from its fixed position, both the first center post fixing rod 60 and the second center post fixing rod 60 move to the right. When the side surface of the second center post fixing rod 60 abuts against the second wall 81 of the recess 8, the first center post fixing rod 60 approaches the first hanging edge 91 of the lid element 9, but is separated from the first hanging edge 91 because β>α. Similarly, when the side surface of the first center post fixing rod 60 abuts against the first wall 80 of the recess 8, the second center post fixing rod 60 approaches the second hanging edge 92 of the lid element 9, but is separated from the second hanging edge 92 because β>α. Since the lid element 9 is removably inserted into the recess 8, there is a risk that the lid element 9 will float upward out of the recess 8 due to the impact when the center column fixing rod 60 abuts against the lid element 9, so the center column fixing rod 60 is restricted from abutting against the lid element 9.

[0028] 7 is a diagram showing the attachment of the lid element 9 to the recess 8 according to the first embodiment. The longitudinal dimension of the upper side 90 of the lid element 9 is shorter than the longitudinal dimension of the recess 8, the dimension between the tip of the first bottom side 93 and the tip of the second bottom side 94 is slightly larger than the longitudinal dimension of the recess 8, the height dimension of the lid element 9 is approximately the same as the depth of the recess 8, and the short side dimension of the lid element 9 is approximately the same as the short side dimension of the recess 8.

[0029] As shown by the solid lines in the upper diagram of Fig. 7, the lid element 9 is inserted into the recess 8 in a tilted position, the tip of the second lower side 94 is brought into contact with the corner between the lower end and the bottom 84 of the second wall 81 of the recess 8, the tip of the first lower side 93 is brought into contact with the middle part of the first wall 80 of the recess 8, and the tip of the first lower side 93 is moved downward to the lower end of the first wall 80 while being in sliding contact with the first wall 80 while deforming the first hanging side 91 so as to approach the second hanging side 92, whereby the lid element 9 is attached to the recess 8 as shown by the solid lines in the lower diagram of Fig. 7. In short, by applying a force in the direction of the arrow in the position shown in the upper diagram of Fig. 7 and pushing it in, the position shown in the lower diagram of Fig. 7 is obtained.

[0030] In this state, the tip of the first lower side 93 of the lid element 9 abuts against the lower end of the first wall 80 of the recess 8, the tip of the second lower side 94 abuts against the lower end of the second wall 81 of the recess 8, and the lower surfaces of the first lower side 93 and the second lower side 94 abut against the bottom 84 of the recess 8. The first hanging side 91 and the second hanging side 92 of the lid element 9 are slightly inclined with respect to the vertical plane in a direction in which the lower ends approach each other due to elastic deformation, and the tip of the first lower side 93 is pressed against the lower end of the first wall 80 of the recess 8 and the tip of the second lower side 94 is pressed against the lower end of the second wall 81 of the recess 8 by the restoring force of the elastically deformed first hanging side 91 and second hanging side 92, and the lid element 9 is fixed in a stretched state between the lower end of the first wall 80 and the lower end of the second wall 81 of the recess 8.

[0031] When it is desired to remove the lid element 9 from the recess 8, the opposing first hanging edge 91 and second hanging edge 92 are deformed so as to approach each other, thereby tilting the lid element 9, for example, to release the tip of the first lower edge 93 from being pressed against the first wall 80 of the recess 8, and then the lid element 9 is rotated, whereby the lid element 9 can be removed from the recess 8. In short, the lid element 9 can be removed by rotating it upwards while applying a force in the direction of the arrow in the attitude shown in the lower diagram of FIG. 7. In this way, since the lid element 9 is detachable from the recess 8, it can also be used as a retrofit for an existing center column fixing tray (Patent Document 1).

[0032] The lid element 9 can be used as a tool for scraping out dirt accumulated in the recess 8. As shown in Fig. 8, the lid element 9 is inserted into the recess 8 in a vertical position, the second lower edge 94 is brought into contact with the lower end portion of the first wall 80 of the recess 8, and the tip of the second lower edge 94 is brought into contact with the bottom 84 of the recess 8. In this state, the lid element 9 is rotated so that the tip of the second lower edge 94 slides from one end (the lower end of the first wall 80) to the other end (the lower end of the second wall 81) of the bottom of the recess 8, and the tip of the second lower edge 94 is moved upward in a state of sliding contact with the second wall 81 of the recess 8.

[0033] 9 shows a modified example of the center column fixing device equipped with the lid element according to the first embodiment. The bottom 84 of the recess 8 is composed of a horizontal main surface portion and inclined portions 840 on the left and right sides of the main surface portion. The tip of the first lower side 93 of the lid element 9 abuts against the lower end of the first wall 80 of the recess 8 and the upper end of the bottom 84 of the recess 8 (one of the inclined portions 840), and the tip of the second lower side 94 of the lid element 9 abuts against the lower end of the second wall 81 of the recess 8 and the upper end of the bottom 84 of the recess 8 (the other inclined portion 840).

[0034] [B-3] Center column fixing device with lid element according to the second embodiment 11, the lid element 9 includes an upper side 90 shorter than the longitudinal dimension of the opening, a first hanging side 91 and a second hanging side 92 hanging down from the longitudinal end of the upper side 90, a first lower side 93 and a second lower side 94 extending away from the lower ends of the first hanging side 91 and the second hanging side 92, a first outer vertical side 95 rising from the tip of the first lower side 93, and a second outer vertical side 96 rising from the tip of the second lower side 94, and a bulging abutment portion 950 is formed on the outer surface of the first outer vertical side 95, and a bulging abutment portion 960 is formed on the outer surface of the second outer vertical side 96. The upper side 90, the first lower side 93, and the second lower side 94 extend horizontally.

[0035] As shown in Figure 10, when the lid element 9 is attached to the recess 8, the first lower edge 93 and the second lower edge 94 abut against the bottom 84 of the recess 8, and due to the elastic force in the expanding direction of the first depending edge 91 and the second depending edge 92, the abutment portion 950 of the first outer vertical edge 95 abuts against the lower end portion of the first wall 80 and the abutment portion 960 of the second outer vertical edge 96 abuts against the lower end portion of the second wall 81.

[0036] As shown in Figure 10, when the lid element 9 is attached to the recess 8, a first hole portion 71 into which the first center pillar fixing rod 60 is inserted is formed in the space surrounded by the first wall 80 of the recess 8, the first hanging edge 91 of the lid element 9, the first bottom edge 93 of the lid element 9, and one end of the third wall 82 and the fourth wall 83 of the recess 8, and a second hole portion 72 into which the second center pillar fixing rod is inserted is formed in the space surrounded by the second wall 81 of the recess 8, the second hanging edge, the second bottom edge, and the other ends of the third wall and the fourth wall. When the first center pillar fixing rod 60 is inserted into the first hole portion 71, the lower end of the first center pillar fixing rod 60 is positioned higher than the upper end of the first outer vertical edge 95, and when the second center pillar fixing rod 60 is inserted into the second hole portion 72, the lower end of the second center pillar fixing rod 60 is positioned higher than the upper end of the second outer vertical edge 96.

[0037] [B-4] Lid element according to another embodiment 12(A), the lid element 9 includes an upper side 90 shorter than the longitudinal dimension of the opening, a first hanging side 91 and a second hanging side 92 hanging down from a longitudinal end of the upper side 90, and a first lower curved side 91' and a second lower curved side 92' extending integrally in a curved shape in a direction away from each other from the lower ends of the first hanging side 91 and the second hanging side 92. When the lid element 9 is attached to the recess 8, the elastic force of the first hanging side 91 and the second hanging side 92 in the expanding direction causes the tip of the first lower curved side 91' to abut against the lower end of the first wall 80 of the recess 8 and one end of the bottom 84, and the tip of the second lower curved side 92' to abut against the lower end of the second wall 81 of the recess 8 and one end of the bottom 84.

[0038] In the embodiment shown in Figure 12 (B), the lid element 9 consists of an upper edge 90 that is shorter than the longitudinal dimension of the opening, a first hanging edge 91 and a second hanging edge 92 hanging from the longitudinal end of the upper edge 90, a first lower edge 93 and a second lower edge 94 extending in a direction away from each other from the lower ends of the first hanging edge 91 and the second hanging edge 92, a first outer vertical edge 95' hanging from the tip of the first lower edge 93, and a second outer vertical edge 96' hanging from the tip of the second lower edge 94, and a bulging abutment portion 950' is formed on the outer surface of the first outer vertical edge 95' and a bulging abutment portion 960' is formed on the outer surface of the second outer vertical edge 96'. When the lid element 9 is attached to the recess 8, the lower ends of the first outer vertical edge 95' and the second outer vertical edge 96' abut against the bottom 84 of the recess 8, and due to the elastic force in the expanding direction of the first hanging edge 91 and the second hanging edge 92, the abutment portion 950' of the first outer vertical edge 95' abuts against the lower end portion of the first wall 80 and the abutment portion 960' of the second outer vertical edge 96' abuts against the lower end portion of the second wall 81.

[0039] In the embodiment shown in FIG. 12(C), lid element 9 comprises upper side 90 that is shorter than the longitudinal dimension of the opening, first and second hanging sides 91 and 92 hanging down from a longitudinal end of upper side 90, and first and second lower inclined sides 93" and 94" that rise at an angle in a direction away from each other from the lower ends of the first and second hanging sides 91 and 92. When lid element 9 is attached to recess 8, the lower ends of first and second hanging sides 91 and 92 abut against bottom 84 of recess 8, and lid element 9 is configured such that the upper end of first lower inclined side 93" abuts against the lower end of first wall 80 and the upper end of second lower inclined side 94" abuts against the lower end of second wall 81 due to the elastic force of first and second hanging sides 91 and 92 in the expanding direction. [Explanation of symbols]

[0040] 5 Middle pillar 60 Center column fixing rod (first center column fixing rod, second center column fixing rod) 7 Plate 70 Receptacle 71 1st hole (hole) 72 2nd hole (hole) 8 Recess 80 1st wall 81 Second wall 82 Third wall 83 4th wall 84 Bottom 9 Lid element 90 Top 91 1st hanging side 92 2nd hanging side 93 First bottom side (first bottom end) 94 Second bottom side (second bottom end) 95 1st outer vertical side (1st lower end part) 96 2nd outer vertical side (2nd lower end part) 91´ 1st lower curved side (1st lower end part) 92´ 2nd lower curved side (2nd lower end part) 95´ 1st outer vertical side (1st lower end part) 96´ 2nd outer vertical side (2nd lower end part) 93´´ 1st lower slope side (1st lower end part) 94´´ 2nd lower slope side (2nd lower end part) FL floor surface α is the distance between the wall of the recess and the center column fixing rod when the center column fixing rod is inserted into the hole formed by the wall of the recess and the hanging side of the lid element β The distance between the hanging edge of the lid element and the center column fixing rod when the center column fixing rod is inserted into the hole formed by the wall of the recess and the hanging edge of the lid element

Claims

1. A center column fixing device in which a center column fixing rod is received in a recess provided in a floor surface through a slot-shaped opening formed at the upper end of the recess, The recess includes a first wall and a second wall extending downward from short edges of the longitudinal ends of the opening, and a bottom, A lid element is removably attached to the recess, The lid element includes an upper side that is shorter than the longitudinal dimension of the opening, a first hanging side and a second hanging side that hang down from an end or a vicinity of an end in the longitudinal direction of the upper side, and a first lower end portion and a second lower end portion that extend in a direction away from each other from lower ends of the first hanging side and the second hanging side, When the lid element is attached to the recess, the first lower end portion and the second lower end portion abut the bottom portion, the first lower end portion abuts the lower end portion of the first wall, and the second lower end portion abuts the lower end portion of the second wall. The recess is formed with holes adjacent to both longitudinal ends of the upper side of the lid element, into which a center column fixing rod is inserted. Middle column fixation device.

2. a dimension between a tip of the first lower end portion and a tip of the second lower end portion of the lid element is greater than a longitudinal dimension of the recess; The lid element is removably attached to the recess by elastic deformation.

2. The center post fixing device of claim 1.

3. The lid element includes the upper side, the first hanging side and the second hanging side, a first lower side located at a lower end of the first hanging side and abutting the bottom portion, and a second lower side located at a lower end of the second hanging side and abutting the bottom portion, The lid element is configured such that a tip end of the first lower side abuts against a lower end of the first wall and a tip end of the second lower side abuts against a lower end of the second wall due to an elastic force in an expansion direction of the first hanging side and the second hanging side.

3. A center pillar fixing device according to claim 1 or 2.

4. The recess includes a third wall and a fourth wall extending downward from a long edge of the opening, a first hole portion into which a first center pillar fixing rod is inserted is formed in a space surrounded by the first wall, the first hanging side, the first bottom side, and one end of the third wall and the fourth wall; A second hole portion into which a second center pillar fixing rod is inserted is formed in a space surrounded by the second wall, the second hanging side, the second bottom side, and the other end of the third wall and the fourth wall.

4. The center post fixing device according to claim 3.

5. In a state where the center column fixing rod is inserted into the hole formed adjacent to both ends in the longitudinal direction of the upper side of the lid element, a distance between one of the center column fixing rods and the first wall is smaller than a distance between the one of the center column fixing rods and the first hanging side, The distance between the other center column fixing rod and the second wall is smaller than the distance between the other center column fixing rod and the second hanging side.

2. The center post fixing device of claim 1.

6. A cover element that is removably mounted on a longitudinal recess of a center column fixing device, The lid element includes an upper side, a first hanging side and a second hanging side hanging from a longitudinal end or a vicinity of the end of the upper side, and a first lower side and a second lower side extending in a direction away from each other from lower ends of the first hanging side and the second hanging side, The longitudinal dimension of the upper side is shorter than the longitudinal dimension of the recessed portion, A dimension between a tip of the first lower side and a tip of the second lower side is equal to or greater than a longitudinal dimension of the recess; The height dimension of the lid element is approximately the same as the depth of the recess; The short dimension of the lid element is approximately the same as the short dimension of the recess; Lid element.

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