JP2017119982A - Beam member for step and beam structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a beam member for steps and a beam structure capable of easily adjusting forward and back length and height between steps.SOLUTION: A beam structure 20 comprises a step plate supporting member 21 supporting each of step plates, a connecting member 22 connecting adjacent step plate supporting members, a floor surface fixing member 23 fixing a lowermost step plate supporting member 21a onto a floor surface 1 of lower floor, and a wall surface fixing member 24 fixing a highest step plate supporting member 21c onto a wall surface 2. The step plate supporting member and the connecting member are connected by screwing of a male screw 26 formed on one of them and a female screw 32 formed on the other one in a manner where the height may be adjusted, a bolt insertion hole 35 as a round hole is formed on either of a projecting piece 28 projecting from a side near an upper edge of the step plate supporting member or a projecting piece 34 projecting from the connecting member, and a bolt insertion hole 30 as a lateral hole is formed on the other one. Via the bolt inserted into the bolt insertion holes, the connection may be established in a manner where front and back length may be adjusted.SELECTED DRAWING: Figure 2

Description

The present invention relates to a stair girder member and a girder structure.

Instead of supporting the stair treads with side girders arranged on both sides in the width direction (Sasara girders), one or two (or more) support girders are arranged at the center in the width direction. And the staircase structure (open staircase) which mounts and fixes a tread board on it is indicated by following patent documents 1 and 2 grade.

The staircase described in Patent Document 1 includes a tread 6 and a supporting member 1, and the supporting member 1 includes a tread mounting part 1 a, a horizontal member 2, a front connecting part 3, and a rear connecting part 4. The connecting portion 3 is connected to the rear connecting portion 4 of the lower support member 1.

The step board support girder described in Patent Document 2 includes support units 1, 2, and 3 including tread board mounting portions 1a, 2a, and 3a, a first member 4, and a second member 5, and the first member 4 and The second member 5 is connected to form a series of girders.

JP 2003-213866 A JP-A-5-340049

However, in the conventional staircase structure or girder structure described in Patent Documents 1 and 2, no means for adjusting the position in the front-rear direction and the height direction between adjacent treads is shown. For this reason, it is difficult to cope with a case where treads having different widths are placed or when the dimensional accuracy of each member is poor.

That is, in Patent Document 1, from the lower end of the rear connection part 4 in a state where the rear connection part 4 supporting the lower step board 6 is externally fitted below the front connection part 3 supporting the upper step board 6. Since the bolt 5 is inserted and screwed into the female screw portion 6a on the back surface of the tread board to fix the tread board 6 (FIG. 3), the height between the upper and lower tread boards 6, 6 depends on the length of the bolt 5. Fixed and cannot be adjusted. Moreover, since the space | interval of the front-back direction becomes fixed with the length of the horizontal member 2 which connects the front side connection part 3 and the rear side connection part 4 to a horizontal direction (front-back direction), this cannot be adjusted.

Even in Patent Document 2, the height interval and the front-rear interval between the treads are uniformly determined by the dimensions of the members constituting the support units 1, 2, 3, and thus cannot be adjusted.

Therefore, the problem to be solved by the present invention is a case where treads having different widths are used by providing a girder member and a girder structure that enable adjustment in the front-rear direction and the height direction between adjacent treads. In addition, the construction corresponding to this is easy, and it is also possible to easily cope with the case where the dimensional accuracy of each member is not good.

In order to solve this problem, the invention according to claim 1 of the present application is a girder member constituting a girder structure of a staircase, wherein a tread board support member having a tread board support plate for supporting a tread board at an upper end, and an upper tread board It has a connecting member for connecting the support member and the lower tread support member so that the height can be adjusted and the front and rear can be adjusted.

The invention according to claim 2 of the present application is the girder member according to claim 1, wherein at least one of the tread board support member and the connecting member is a cylindrical member, and the other member can slide in the height direction. And having a fixing means for fixing at an arbitrary position in this fitted state, the connecting member and the upper tread support member are connected so as to be adjustable in height.

The invention according to claim 3 of the present application is the girder member according to claim 2, wherein the fixing means is formed on the one member and the other member and is screwed onto the female screw. It consists of possible male screws.

According to a fourth aspect of the present invention, in the girder member according to any one of the first to third aspects, the fastening member insertion hole is formed in both the protruding piece protruding from the tread plate support member and the protruding piece protruding from the connecting member. And one of them is formed as a round hole having an inner diameter substantially equal to the shaft diameter of the fastening member, and the other is formed as a horizontally long hole having a width dimension larger than the shaft diameter of the fastening member. The connecting member and the lower tread board support member are connected to each other so as to be adjustable in the front-rear direction through a fastening member inserted through the connecting member.

The invention according to claim 5 of the present application is the girder member according to claim 4, wherein one of the projecting piece of the tread plate support member and the projecting piece of the connecting member is formed in a plate shape, and the other is the plate-shaped projecting piece. It is a pair of parallel protrusions extending in parallel across a gap that can be sandwiched.

The invention according to claim 6 of the present application is the girder member according to claim 5, wherein the tread plate support member is formed with a slit extending in the axial direction, and the pair of parallel members extends continuously from both ends facing the slit. A protruding piece is formed.

The invention according to claim 7 of the present application is the girder member according to any one of claims 1 to 6, further comprising a floor surface fixing member that fixes a tread plate support member that supports the bottom tread to the floor surface of the lower floor And a wall surface fixing member that fixes a tread plate support member that supports the uppermost tread plate to the wall surface.

The invention according to claim 8 of the present application is a girder structure configured using the girder member according to any one of claims 1 to 7.

According to the first aspect of the present invention, since the position of the adjacent treadboard support members can be adjusted in the front-rear direction and the height direction via the connecting member, even when treadles having different widths are used, it is possible Thus, it is possible to easily cope with the case where the dimensional accuracy of each member is not good.

According to the invention which concerns on Claim 2, one suitable embodiment with which a connection member and an upper step tread board support member are connected so that height adjustment is possible is provided.

According to the third aspect of the present invention, the connecting member and the upper tread board supporting member are connected by screwing of the screws, so that the height adjustment is easy and a strong connecting structure is obtained. Further, by turning the screw, the upper stepboard support member (and the upper stepboard support member) can be mounted on the connecting member (and therefore the lower stepboard support member and the stepboard placed thereon) at any angle. It is easy to attach the treads to be placed, and it is easy to apply to the surrounding stairs.

According to the fourth aspect of the present invention, the connecting member and the lower tread board supporting member are connected by inserting the screw into the round hole and the long hole and fastening them, so that the longitudinal adjustment is easy.

According to the invention of claim 5, the connecting member and the lower tread support member are connected by tightening with a bolt while the plate-like protruding piece is sandwiched between the parallel protruding pieces. Can be obtained.

According to the sixth aspect of the present invention, when connecting the connecting member and the lower-stage treadboard support member, the connecting member is reduced in diameter by tightening the bolt, and the upper member is connected to the upper-stage treadboard support member. Since the strength can be increased, a stronger connection structure can be obtained.

According to the seventh aspect of the present invention, the bottom tread support member is fixed to the floor of the lower floor using the floor fixing member, and the top tread support member is fixed to the wall using the wall fixing member. Therefore, a girder structure can be easily constructed using these girder members.

According to the invention which concerns on Claim 8, the girder structure constructed using these girder members is obtained. According to this girder structure, the adjacent treadboard support members can be adjusted in position in the front-rear direction and the height direction via the connecting members. It is easy, and it is possible to easily cope with the case where the dimensional accuracy of each member is not good.

It is a side view of the staircase structure which has the girder member and girder structure by one Embodiment (Example 1) of this invention. It is a side view which divides | segments and shows this staircase structure for every girder structure structural member (girder member). It is the side view (a), front view (b), back view (c), top view (d), and bottom view (e) which show independently the tread board support member used for this staircase structure. It is the side view (a), front view (b), back view (c), top view (d), and bottom view (e) which show independently the tread support member which supports the bottom tread of this staircase structure. They are a side view (a), a front view (b), a rear view (c), a plan view (d), and a bottom view (e) showing the connecting member used in this staircase structure alone. They are a side view (a), a front view (b), a rear view (c), a plan view (d), and a bottom view (e) showing the floor fixing member used in this staircase structure alone. It is the side view (a), front view (b), back view (c), top view (d), and bottom view (e) which show the wall surface fixing member used for this staircase structure independently. It is the side view (a), the top view (b), and bottom view (c) which show the connection state of the tread board support member in this staircase structure, and an up-and-down girder connection member. It is a side view of the staircase structure which has the girder member and girder structure by other embodiment (Example 2) of this invention. It is a side view which divides | segments and shows this staircase structure for every girder structural member (girder member). It is the side view (a), front view (b), back view (c), top view (d), and bottom view (e) which show independently the tread board support member used for this staircase structure. It is the side view (a), front view (b), back view (c), top view (d), and bottom view (e) which show the upper and lower girder connecting member used for this staircase structure independently. They are a side view (a), a front view (b), a rear view (c), a plan view (d), and a bottom view (e) showing the floor fixing member used in this staircase structure alone. It is the side view (a), front view (b), back view (c), top view (d), and bottom view (e) which show the wall surface fixing member used for this staircase structure independently. It is the side view (a), the top view (b), and bottom view (c) which show the connection state of the tread board support member in this staircase structure, and an up-and-down girder connection member. It is a top view which shows embodiment which applied the staircase structure by this invention (Example 1) to the surrounding staircase. It is each top view which shows that width adjustment is possible in the connection of the tread board support member and upper / lower girder connection member in this staircase structure.

The present invention will be described in detail below with reference to examples.

FIG. 1 is a side view of a staircase structure 10 according to an embodiment (Example 1) of the present invention, and FIG. 2 is a side view of the staircase structure 10 divided into girders. This staircase structure 10 has a girder structure 20 that supports a plurality of treads (three steps treads 11a to 11c are shown for the sake of simplification. When there is no need to distinguish them, these are collectively denoted by reference numeral 11). Have

The girder structure 20 includes tread plate support members 21a to 21c that support each tread plate (when there is no need to distinguish them, these are collectively denoted by reference numeral 21), and the adjacent tread plate support members are respectively in the front-rear direction and the vertical direction. The connecting members 22a and 22b that are connected at a predetermined interval (when there is no need to distinguish between them, these are collectively denoted by reference numeral 22), and the tread support member 21a that supports the bottom tread 11a is connected to the floor of the lower floor. 1 and a wall surface fixing member 24 that fixes the tread board support member 21c that supports the uppermost tread board 11c to the wall surface 2.

The tread board support members 21b and 21c that support the middle tread board 11b and the uppermost tread board 11c have the same configuration. That is, as shown in FIG. 3, these tread plate support members 21 have a tread plate fixing plate 25 at the upper end and a cylindrical portion having a male screw 26 engraved and formed over at least a predetermined length region on the lower end side. 27 and a vertical plate 28 projecting from the upper end portion of the cylindrical portion 27 toward one side. The tread plate fixing plate 25 is formed with screw holes 29 for fixing the tread plate 11 placed thereon with screws (not shown). Further, the vertical plate 28 is formed with bolt insertion long holes 30 in parallel at two upper and lower positions.

The tread board support member 21a that supports the lowermost tread board 11a also has substantially the same configuration as the above-described tread board support members 21b and 21c, but there is no tread board support member on the lower stage side, and thus a connecting member that couples to this. Since the connection part with respect to is unnecessary, as shown in FIG. 4, the cylindrical part 27 is shortened. A female screw 31 for connecting to the floor surface fixing member 23 is formed at the lower end of the tread board support member 21a.

The connecting member 22 (22a, 22b) has the same configuration. That is, as shown in FIG. 5, each connecting member 22 includes a cylindrical portion 33 having a female screw 32 engraved and formed at least over a predetermined length region on the upper end side, and one cylindrical direction from the cylindrical portion 33. It has the protruding piece 34 which protrudes, and is integrally formed. In this embodiment, a slit 45 is formed in a part of the cylindrical portion 33, and a pair of pieces protrudes in parallel in one side direction with a gap between them from both ends facing the slit 45. It is formed as a parallel projecting piece 34. The cylindrical portion 33 has an inner diameter that is substantially the same as or slightly larger than the outer diameter of the cylindrical portion 27 of the tread support member 21 and can be fitted into the cylindrical portion 27. 26 and the female screw 32 of the cylindrical portion 33 are coupled to the upper-stage tread board support member 21 through screwing. Bolt insertion holes 35 are formed in two stages on the parallel projecting piece 34, and the bolt 36 (FIG. 1) is inserted into the projecting piece 34 with the vertical plate 28 of the tread support member 21 inserted in the gap between the projecting pieces 34. The bolt is inserted into the bolt insertion hole 35 and the bolt insertion long hole 30 of the vertical plate 28 and screwed to a nut (not shown) on the opposite side, thereby being connected to the tread support member 21 on the lower side (FIG. 8).

The connecting member 22 includes a tread board support member that supports the lower tread board (for example, a tread board support member 21b that supports the tread board 11b) and a tread board support member that supports the upper tread board (for example, the tread board support member 21c that supports the tread board 11c). Are connected with the interval adjusted in the vertical direction and the front-rear direction. That is, as described above, in a state where the cylindrical portion 27 of the upper tread board support member 21c is fitted to the cylindrical portion 33 of the connecting member 22 below, the male screw 26 of the cylindrical portion 27 and the cylindrical portion 33 The distance in the vertical direction can be adjusted through threaded engagement with the female screw 32, and one of the holes through which the bolts 36 are inserted (the bolt insertion holes 35 of the projecting piece 34 in this embodiment) is the shaft diameter of the bolts 36. It is possible to adjust the distance in the front-rear direction by forming the other (the bolt insertion long hole 30 of the vertical plate 28 in this embodiment) as a long hole in the lateral direction. It is. FIG. 17A shows the case where the distance in the front-rear direction between the adjacent tread board support members 21 in this embodiment (therefore, the distance in the front-rear direction between the treads) is minimized, and FIG. (C) shows a case where the same interval is maximized, and the front-rear interval adjustment can be easily performed by moving the insertion position of the bolt 36 within the range of the bolt insertion slot 30 of the vertical plate 28.

The structure of the floor surface fixing member 23 is particularly limited as long as the floor plate supporting member 21a (FIG. 4) that supports the lowermost step plate 11a can be fixed to the floor surface 1 of the lower floor so that the height can be adjusted. In this embodiment, the floor surface fixing plate 37 that is fixed to the floor surface and the cylindrical portion 38 that hangs upward are integrally formed. A male screw 39 is formed at least over a predetermined length region on the upper end side. Then, screws (not shown) are driven into the lower floor 1 from the screw holes 40 of the floor fixing plate 37 to fix the floor fixing plate 37 to the lower floor 1. In a state where the cylindrical portion 38 of the floor surface fixing member 23 is fitted to the cylindrical portion 27, the lowermost step board support member 21a is engaged by screwing the female screw 31 of the cylindrical portion 27 and the male screw 39 of the cylindrical portion 38. Therefore, the tread 11a supported thereon can be fixed to the floor 1 on the lower floor at a predetermined height. In this embodiment, a female screw 31 is formed in the cylindrical portion 27 of the lowermost step board support member 21a and is screwed into a male screw 39 of the cylindrical portion 38 of the floor surface fixing member 23. As in the case of the tread board support members 21b and 21c, an embodiment in which a male screw is formed in the cylindrical portion 27 of the lowermost tread board support member 21a and this is screwed into a female screw formed in the cylindrical portion of the floor surface fixing member 23. It may be adopted.

The wall surface fixing member 24 is not particularly limited in configuration as long as it can fix the tread plate support member 21c (FIG. 3) supporting the uppermost tread plate 11c to the wall surface 2 so as to be adjustable in the front-rear direction. In the embodiment, a wall surface fixing plate 41 fixed to the wall surface and a parallel projecting piece 42 protruding from one surface thereof are integrally formed. The parallel projecting piece 42 has substantially the same configuration as the parallel projecting piece 34 of the connecting member 22, and is composed of a pair of pieces extending in parallel with a predetermined gap between each other, through which the bolt insertion hole 43 extends vertically. It is formed in two stages. Then, a screw (not shown) is driven into the wall surface 2 from the screw hole 43 of the wall surface fixing plate 41 to fix the wall surface fixing plate 41 to the wall surface 2, and then the vertical plate of the uppermost stepping plate support member 21 c is inserted into the gap between the projecting pieces 42. With the bolt 28 inserted, the bolt 36 (FIG. 1) is passed through the bolt insertion hole 43 of the projecting piece 42 and the bolt insertion long hole 30 of the vertical plate 28 and screwed to a nut (not shown) on the opposite side. The uppermost tread board support member 21 c can be fixed to the wall surface 2.

The construction method of the staircase structure 10 and the girder structure 20 described above will be described. After fixing the floor surface fixing member 23 to the floor surface 1 of the lower floor by screwing the screw into the floor surface 1 of the lower floor through the screw hole 40 of the floor surface fixing plate 37, the floor portion is fixed to the cylindrical portion 27 of the lowermost step board support member 21a. In the state in which the cylindrical portion 38 of the surface fixing member 23 is fitted, the height of the lowermost tread support member 21a is adjusted by screwing the female screw 31 of the cylindrical portion 27 and the male screw 39 of the cylindrical portion 38. And fix. Next, the cylindrical portion 27 of the middle stepping plate support member 21b that supports the tread plate 11b is fitted into the cylindrical portion 33 of the connecting member 22a, and these are adjusted in height through screwing of the male screw 26 and the female screw 32. And connect them. Then, the bolt 36 is inserted into the bolt insertion hole of the projecting piece 34 in a state where the vertical plate 28 of the lowermost step board support member 21a fixed to the floor 1 of the lower floor is inserted into the gap of the parallel projecting piece 34 of the connecting member 22a. 35 and the vertical plate 28 are passed through the bolt insertion long holes 30 and screwed to the nuts (not shown) on the opposite side, thereby adjusting the front and rear within the range of the bolt insertion long holes 30 to connect the connecting member 22a to the lowermost stepping plate. It connects with the support member 21a.

In this embodiment, the slit 45 is formed in the cylindrical portion 33 of the connecting member 22a, and the vertical plate 28 is sandwiched between the pair of pieces of the projecting piece 34 to be bolted. Therefore, when the bolt is tightened, the slit 45 is closed. In addition to the threaded engagement of the male screw 26 and the female screw 32, a strong fitting state is obtained between the cylindrical portions 27 and 33, and a fixing structure with high strength is obtained. In addition, when the cylindrical portion 33 is reduced in diameter by bolt tightening, or when a force is applied to the cylindrical portion 33 after the tread board support member 21 and the connecting member 22 are connected, the cylindrical portion 33 is distorted or twisted. In order to prevent this from occurring, flange portions 34a and 34b extending in the horizontal direction with a predetermined width are formed on the upper and lower ends of each piece constituting the protruding piece 34 (FIG. 5). Also for the wall surface fixing member 24, when the uppermost step board support member 21c is fixed with the vertical plate 28 of the uppermost step board support member 21c sandwiched in the gap between the pieces constituting the projecting piece 42, bolt fastening is performed. When the diameter of the cylindrical portion 33 is reduced, or when a force is applied to the cylindrical portion 33 after the tread board support member 21 and the connecting member 22 are connected, the wall surface fixing plate 41 fixed to the wall surface 2 is distorted. Similarly, flange portions 42a and 42b extending in the horizontal direction with a predetermined width are formed on the upper and lower ends of each piece constituting the projecting piece 42 in order to prevent the occurrence of bending or bending (FIG. 7).

Repeat this process for the number of steps in the stairs. Then, the uppermost tread board support member 21 c is fixed to the wall surface 2 by the wall surface fixing member 24. As described above, this operation is performed by driving a screw (not shown) from the screw hole 44 of the wall surface fixing plate 41 into the wall surface 2 and adjusting the height with the floor surface 3 on the upper floor. After fixing the fixing member 24 to the wall surface 2, the bolt 36 (FIG. 1) is connected to the bolt insertion hole 43 of the protruding piece 42 and the vertical position with the vertical plate 28 of the uppermost tread plate support member 21 c inserted into the gap of the protruding piece 42. By passing through the bolt insertion long hole 30 of the plate 28 and screwing it onto a nut (not shown) on the opposite side, it can be performed together with front-rear adjustment. After the girder member 20 is thus constructed, the step board 11 is placed and fixed on each of the tread board support members 21 to obtain the staircase structure 10.

Such a staircase structure 10 and a girder structure 20 can be applied to both a straight staircase and a surrounding staircase. FIG. 16 shows an embodiment applied to a surrounding staircase. Since the upper-stage treadboard support member 21 is connected to the connecting member 22 through screwing between the male screw 26 of the cylindrical portion 27 of the treadboard support member 21 and the female screw 32 of the cylindrical portion 33 of the connecting member 22, It is possible and easy to install the tread board support members 21 adjacent to each other at an arbitrary rotation angle. Note that the front end corner portion of the tread plate fixing plate 25 is chamfered so as to support the tread plates (the tread plates 11c to 11e in FIG. 16) constituting the turning portion when applied to a turning staircase as shown in FIG. This is to prevent the tread board fixing plate 25 of the tread board support member 21 (the tread board support members 21c to 21e in FIG. 16) from exceeding the nose (front end surface) of the tread board.

FIG. 9 is a side view of a staircase structure 50 according to another embodiment (Example 2) of the present invention, and FIG. 10 is a side view showing the staircase structure 50 divided for each girder component. This staircase structure 50 has a girder structure 60 that supports a plurality of treads (three-step treads 51a to 51c are shown for the sake of simplification. When there is no need to distinguish them, these are collectively denoted by reference numeral 51). Have

The girder structure 60 includes tread board support members 61a to 61c that support each tread board (when there is no particular need to distinguish them, these are collectively denoted by reference numeral 61), and adjacent tread board support members are arranged in the front-rear direction and the up-down direction, respectively. Connecting members 62a to 62c that are connected at a predetermined interval (when there is no particular need to distinguish them, these are collectively denoted by reference numeral 62), and a tread support member 61a that supports the bottom tread 51a is connected to the floor of the lower floor. 1 and a wall surface fixing member 64 that fixes the tread board support member 61c that supports the uppermost tread board 51c to the wall surface 2.

The tread board support members 61 (61a to 61c) have substantially the same configuration. That is, as shown in FIG. 11, these tread board support members 61 have tread board fixing plates 65 at the upper ends and are provided with male screws 66 extending over at least a predetermined length region (all axial lengths in this embodiment) on the lower end side. The cylindrical portion 67 is formed integrally with the cylindrical portion 67 and a parallel projecting piece 68 projecting from the upper end portion of the cylindrical portion 67 toward one side. The cylindrical portion 67 is formed with a slit 85 into which the tip of the vertical plate 74 of the connecting member 62 sandwiched between the parallel protrusions 68 is inserted. The slit 85 is formed over a range that can accommodate at least the tip portion of the vertical plate 74, but may be formed to extend from the upper end to the lower end of the cylindrical portion 67. The tread plate fixing plate 65 is formed with a screw hole 69 for fixing the tread plate 51 placed thereon with screws (not shown). The parallel projecting piece 68 is composed of a pair of pieces projecting in parallel in one side direction with a gap between each other, and bolt insertion holes 70 are formed at two locations on the upper and lower sides through these pieces. Note that the tread board support member 61a that supports the lowermost tread board 51a does not have a tread board support member on the lower stage side, and therefore does not require a connecting part to the connecting member that connects to the tread board support member 61a. It is formed short (not shown).

The connecting member 62 (62a, 62b) has the same configuration. That is, as shown in FIG. 12, each connecting member 62 includes a cylindrical portion 73 having a female screw 72 extending over at least a predetermined length region on the upper end side (all axial lengths in this embodiment), and one cylindrical portion 73 from the cylindrical portion 73. A vertical plate 74 protruding in the lateral direction is formed integrally. The cylindrical portion 73 has an inner diameter that is substantially the same as or slightly larger than the outer diameter of the cylindrical portion 67 of the tread board support member 61 and can be fitted to the cylindrical portion 67. In this fitted state, the male screw of the cylindrical portion 67 is fitted. 66 and the female screw 72 of the cylindrical portion 73 are coupled to the upper tread support member 61. The vertical plate 74 has bolt insertion long holes 75 formed in two upper and lower stages, and the bolt 76 (FIG. 9) protrudes with the vertical plate 74 inserted into the gap between the projecting pieces 68 of the tread plate support member 61. The bolt 68 is inserted into the bolt insertion hole 70 of the piece 68 and the bolt insertion long hole 75 of the vertical plate 74 and is screwed to the nut (not shown) on the opposite side, thereby being coupled to the tread support member 61 on the lower side (FIG. 15). ).

The connecting member 62 includes a tread support member that supports the lower tread (for example, a tread support 61b that supports the tread 51b) and a tread support that supports the upper tread (for example, the tread support 61c that supports the tread 51c). Are connected with the interval adjusted in the vertical direction and the front-rear direction. That is, as described above, the male screw 66 of the cylindrical portion 67 and the female screw 72 of the cylindrical portion 73 in a state in which the cylindrical portion 67 of the upper tread plate support member 61 c is fitted to the cylindrical portion 73 of the connecting member 62. Can be adjusted in the vertical direction through screwing, and one of the holes through which the bolt 76 is inserted (in this embodiment, the bolt insertion hole 70 of the projecting piece 68) substantially matches the shaft diameter of the bolt 76. By forming the other hole (the bolt insertion long hole 75 of the vertical plate 74 in this embodiment) as a long hole in the lateral direction, the distance in the front-rear direction can be adjusted.

The configuration of the floor surface fixing member 63 is not particularly limited as long as the floor plate supporting member 61a that supports the lowermost step plate 51a can be fixed to the floor surface 1 of the lower floor so that the height can be adjusted. In this embodiment, it is formed as a disk-shaped floor surface fixing plate 77 fixed to the floor surface, and has a female screw 78 screwed with the male screw 66 of the cylindrical portion 67 of the tread plate support member 61a. Then, a screw (not shown) is driven into the lower floor 1 from the screw holes 80 of the floor fixing plate 77 to fix the floor fixing plate 77 to the lower floor 1, and then the male portion of the cylindrical portion 67. By screwing the screw 66 into the female screw 78 of the floor surface fixing member 63, the lowermost step board supporting member 61a (and therefore the tread board 51a supported thereon) has a predetermined height with respect to the floor surface 1 of the lower floor. It can be fixed with.

The wall surface fixing member 64 is not particularly limited in configuration as long as it can fix the tread plate support member 61c that supports the uppermost tread plate 51c to the wall surface 2 so as to be adjustable in the front-rear direction. A wall surface fixing plate 81 fixed to the wall surface and a vertical plate 82 protruding from one surface thereof are integrally formed. The vertical plate 82 has substantially the same configuration as the vertical plate 74 of the connecting member 62 and has bolt insertion elongated holes 83 formed in two upper and lower stages, and the vertical plate 82 is a gap between the projecting pieces 68 of the tread plate support member 61c. 9, the bolt 76 (FIG. 9) is passed through the bolt insertion hole 70 of the projecting piece 68 and the bolt insertion long hole 83 of the vertical plate 82 and screwed to a nut (not shown) on the opposite side, It is connected to the uppermost tread board support member 61c (FIG. 15). Then, after screwing a screw (not shown) into the wall surface 2 from the screw hole 84 of the wall surface fixing plate 81 to fix the wall surface fixing plate 81 to the wall surface 2, the wall surface is fixed to the gap between the projecting pieces 68 of the uppermost tread plate support member 61c. With the vertical plate 82 of the member 64 inserted, the bolt 76 (FIG. 9) is passed through the bolt insertion hole 70 of the projecting piece 68 and the bolt insertion long hole 83 of the vertical plate 82 to the nut (not shown) on the opposite side. By screwing, the uppermost tread board support member 61c can be fixed to the wall surface 2.

The construction method of the staircase structure 50 and the girder structure 60 described above will be described. A screw (not shown) is driven into the lower floor 1 from the screw holes 80 of the floor fixing plate 77 to fix the floor fixing member 63 to the floor 1 of the lower floor. By screwing the male screw 66 of the cylindrical portion 67 into the female screw 78 of the floor surface fixing member 63, the lowermost stepboard support member 61a is adjusted in height and fixed. Next, the cylindrical portion 67 of the middle stepping plate support member 61b that supports the tread 51b is fitted into the cylindrical portion 73 of the connecting member 62a, and these are adjusted in height through screwing of the male screw 66 and the female screw 72. And connect them. Then, with the vertical plate 74 protruding from the cylindrical portion 73 inserted into the gap between the projecting pieces 68 of the lowermost step board support member 61a fixed to the floor surface 1 of the lower floor, the bolts 76 are inserted into the projecting pieces 68. The bolt 62 is inserted into the bolt insertion hole 70 and the bolt insertion hole 75 of the vertical plate 74 and is screwed to the nut (not shown) on the opposite side, thereby adjusting the front and rear within the range of the bolt insertion hole 75 and connecting member 62a. Is coupled to the lowermost tread plate support member 61a. In this embodiment, the vertical plate 74 of the connecting member 62 is clamped between the pair of pieces of the projecting piece 68 of each tread plate support member 61 and bolted, so that when the bolt is tightened, the gap between these pieces is closed. In addition to the screwing of the male screw 66 and the female screw 72, a tight clamping state is obtained between the vertical plate 74 and the projecting piece 68, and a fixing structure with high strength is obtained.

Repeat this process for the number of steps in the stairs. Then, the uppermost tread board support member 61 c is fixed to the wall surface 2 by the wall surface fixing member 64. As described above, this work is performed by driving a screw (not shown) into the wall surface 2 from the screw hole 84 of the wall surface fixing plate 81 and adjusting the height with the floor surface 3 on the upper floor. After fixing the fixing member 64 to the wall surface 2, the bolt 76 (FIG. 9) is bolted to the protruding piece 68 in a state where the vertical plate 82 of the wall fixing member 64 is inserted into the gap of the protruding piece 68 of the uppermost tread plate support member 61 c. By passing through the insertion hole 70 and the bolt insertion long hole 83 of the vertical plate 82 and screwing it onto a nut (not shown) on the opposite side, it can be performed together with front-rear adjustment. After the girder member 60 is thus constructed, the step board 51 is placed and fixed on each of the tread board support members 61, and the staircase structure 50 is obtained.

Such a staircase structure 50 and a girder structure 60 can be applied to a straight staircase or a surrounding staircase as in the first embodiment. Since the upper-stage treadboard support member 61 and the connecting member 62 are connected via screwing between the male screw 66 of the cylindrical portion 67 of the treadboard support member 61 and the female screw 72 of the cylindrical portion 73 of the connecting member 62, It is easy and possible to install the tread board support members 61 adjacent to each other at an arbitrary rotation angle, and when applied to a turning stair as shown in FIG. It is possible and easy to install the tread board support members 61 adjacent to each other at an arbitrary rotation angle. As in the first embodiment, when applied to the staircase, in order to prevent the tread plate fixing plate 65 of the tread plate support member 61 that supports the tread plate 51 constituting the turning portion from exceeding the step nose (front end surface) of the tread plate. The front end corner of the tread plate fixing plate 25 is chamfered.

In the first embodiment, the connection member 22 and the upper tread board support member 21 are connected to each other via screws (tail male screw 26 and female screw 32). Although it is easy to adjust, a strong connection structure can be obtained, and since it can be easily applied to surrounding stairs, it is considered to be one suitable connection mode. It is also possible to omit the female screw 32. Even in this case, as described above, the cylindrical portion 27 of the upper-stage treadboard support member (for example, the treadboard support member 21b) is inserted in advance into the cylindrical portion 33 of the lower connecting member 22a at a predetermined height. The vertical plate 28 projecting from the lower tread support member 21a is inserted between the parallel projecting segments 34 projecting from the connecting member 22a, and the bolt insertion hole 35 and the bolt insertion slotted hole. Since the slit 45 of the cylindrical portion 33 of the connecting member is closed by fixing with the bolt 36 passed through 30, a strong fitting state can be obtained between the cylindrical portions 27, 33. It can be firmly connected while maintaining the height.

The present invention has been described in detail with reference to some embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made within the scope of the invention defined in the claims. Or it can be implemented with modifications. For example, in the first embodiment, the male screw 26 is formed in a predetermined height range reaching the lower end of the cylindrical portion 27 of the tread board support member 21, and the female screw 32 is formed in the entire height range of the cylindrical portion 33 of the connecting member 22. However, the present invention is not limited to this. For example, a region where the male screw 26 is not formed is left in the vicinity of the lower end of the cylindrical portion 27 so that the region is smaller than the outer diameter of the threaded region, and a female screw is formed near the upper end of the cylindrical portion 33. The region can be formed larger than the inner diameter of the threaded region, leaving a region where 32 is not formed. If it does in this way, after inserting the lower end of the cylindrical part 27 of the tread board support member 21 into the upper end of the cylindrical member 33 of the connection member 22, and temporarily fixing, it can fix by screwing screws in the state which has not shifted | deviated. Therefore, it becomes easy to perform the operation of connecting and fixing these while adjusting the height, which is one preferred embodiment.

In addition, the formation region of the male screw 26 in the cylindrical portion 27 of the tread board support member 21 is preferably shorter than the formation region of the female screw 32 in the cylindrical portion 33 of the connecting member 22. In this way, if the height of the tread support member 21 is adjusted within the range where the male screw 26 is concealed by the female screw 32 and the cylindrical portion 33, the male screw 26 is not exposed and looks good. Can be maintained well.

Further, the screwing length of the male screw 26 and the female screw 32 is preferably in the range of 30 to 120 mm. If it is less than 30 mm, the joining strength between the tread board support member 21 and the connecting member 22 is insufficient and it becomes difficult to support the stairs, and if it exceeds 120 mm, the workability deteriorates. From this viewpoint, a more preferable range is 50 to 100 mm.

In addition, the screw formation area | region and screwing length demonstrated above are formed in the external thread 39 formed in the cylindrical part 38 of the floor surface fixing member 23 in Example 1, and the cylindrical part 27 of the lowest step board support member 21a. The same applies to the female screw 31. In the second embodiment, the male screw 66 formed on the cylindrical portion 67 of the tread plate support member 61 and the female screw 72 formed on the cylindrical portion 73 of the connecting member 62 are also used. Also, the cylindrical portion 67 of the lowermost step plate support member 61a. The same applies to the male screw 66 and the female screw 78 formed on the floor fixing plate 77 of the floor fixing member 63.

In the first and second embodiments, the male screws 26 and 66 are formed on the cylindrical portions 27 and 67 of the tread board support members 21 and 61 and the female screws 32 and 72 are provided on the cylindrical portions 33 and 73 of the connecting members 22 and 62. These are formed and screwed together, but conversely, female threads are formed in the cylindrical portions 27 and 67 of the tread board support members 21 and 61 and male screws 32 are formed in the cylindrical portions 33 and 73 of the connecting members 22 and 62. Needless to say, an embodiment may be adopted in which these are formed by screwing together.

DESCRIPTION OF SYMBOLS 1 Floor surface of lower floor 2 Wall surface 3 Floor surface of upper floor 10 Stair structure 11 (11a-11c, 11a-11h) Tread 20 Girder structure 21 (21a-21c, 21a-21h) Tread support 22 (22a-22c) Connecting member 23 Floor surface fixing member 24 Wall surface fixing member 25 Tread plate fixing plate 26 Male screw 27 Cylindrical portion 28 Vertical plate (plate-shaped protruding piece)
29 Screw hole 30 Bolt insertion slot (fastening member insertion hole formed as a horizontal slot)
31 Female Thread 32 Female Thread 33 Cylindrical Part 34 Projection (Parallel Projection)
35 Bolt insertion holes (fastening member insertion holes formed as round holes)
36 bolt (fastening member)
37 Floor surface fixing plate 38 Cylindrical portion 39 Male screw 40 Screw hole 41 Wall surface fixing plate 42 Projection piece 43 Bolt insertion hole 44 Screw hole 45 Slit 50 Step structure 51 (51a to 51c) Step board 60 Girder structure 61 (61a to 61c) Support member 62 (62a to 62c) Connecting member 63 Floor surface fixing member 64 Wall surface fixing member 65 Tread plate fixing plate 66 Male screw 67 Cylindrical portion 68 Projection piece (parallel projection piece)
69 Screw hole 70 Bolt insertion hole (fastening member insertion hole formed as a round hole)
72 Female thread 73 Cylindrical portion 74 Vertical plate (plate-shaped protrusion)
75 Bolt insertion slot (fastening member insertion hole formed as a horizontal slot)
76 Bolt (fastening member)
77 Floor surface fixing plate 78 Male screw 80 Screw hole 81 Wall surface fixing plate 82 Vertical plate 83 Bolt insertion slot 84 Screw hole 85 Slit

Claims (8)

A girder member constituting a girder structure of a staircase, the height of a tread plate support member having a tread plate support plate for supporting a tread plate at an upper end, an upper step tread plate support member, and a lower step tread plate support member, and front and rear A girder member comprising a coupling member coupled in an adjustable manner. At least one member of the tread board support member and the connecting member is a cylindrical member, and the other member is slidably fitted in the height direction and fixed at an arbitrary position in this fitted state. The girder member according to claim 1, wherein the connecting member and the upper tread board supporting member are connected to each other so as to be height-adjustable. The girder according to claim 2, wherein the fixing means includes a female screw formed on the one member and a male screw formed on the other member and screwable with the female screw. Element. Fastening member insertion holes are formed in both the projecting piece projecting from the tread board support member and the projecting piece projecting from the connecting member, and one of them is formed as a round hole having an inner diameter substantially equal to the shaft diameter of the fastening member. In addition, the other is formed as a horizontally long hole having a width dimension larger than the shaft diameter of the fastening member, and the connecting member and the lower treadboard support member can be adjusted in the front-rear direction through a fastening member inserted through the round hole and the horizontally long hole. The girder member according to any one of claims 1 to 3, wherein the girder member is connected. Either one of the projecting piece of the tread board support member and the projecting piece of the connecting member is formed in a plate shape, and the other is a pair of parallel projecting pieces extending in parallel with a gap between which the plate-shaped projecting piece can be sandwiched. The girder member according to claim 4, wherein: 6. The staircase structure according to claim 5, wherein a slit extending in the axial direction is formed in the tread board support member, and the pair of parallel projecting pieces are formed so as to extend continuously from both ends facing the slit. . Furthermore, it has a floor surface fixing member that fixes the tread board support member that supports the bottom tread to the floor surface of the lower floor, and a wall surface fixing member that fixes the tread board support member that supports the top tread to the wall surface. The girder member according to any one of claims 1 to 6, wherein the girder member is characterized. A girder structure configured using the girder member according to claim 1.