JP2012197673A - Structure including cap piece and connection member for cap piece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure using a connection member for cap pieces, of which good appearance is maintained for a long period.SOLUTION: A structure using a connection member for cap pieces having a width wider than that of the end faces of a staircase wall to which the cap pieces are attached comprises a first member and a second member. The first member is provided with: a surface part which covers a gap between the opposing end faces of a pair of cap pieces to be connected; a right and left pair of side face parts which extend from the both ends of the surface part and cover the gap from the right and left sides, respectively; and a surface part-side insertion face part which extends from the surface part toward the back side and enters the gap from the front side of the cap pieces. The second member is provided with: a right and left pair of back face parts which extend from the tips of the side face parts and cover the part of the gap exposed on a staircase wall surface from the back side, respectively; and a back face part-side insertion face part composed of an insertion region which extends from the back face part toward the front face and enters the part of the gap exposed on the staircase wall surface from the back side of the cap pieces, and an extension region which extends from the insertion region to the side in the opposite direction.

Description

  The present invention relates to a structure including a headboard attached to a staircase wall and a headboard connecting member, and belongs to the technical field of staircase members.

  Conventionally, when a headboard wider than this end face is attached to the end face of the staircase wall that separates the corridor side and the staircase side, as shown in FIG. 10, between the opposing end faces of a pair of headboards B1 and B2 fixed to the staircase wall A In some cases, a gap G is formed in the surface, which may impair the appearance.

  As an attachment structure capable of coping with this problem, there is one disclosed in Patent Document 1, for example. In the technique described in Patent Document 1, as shown in FIGS. 10 and 11, a connecting member C1 that connects a pair of headboards B1 and B2 on the staircase wall A is used, and the connecting member C1 is an elastic body. In addition, the gap G between the opposing end faces of the caps B1 and B2 is covered with a surface portion C11 that covers from the front side, a pair of left and right side portions C12 and C12 that covers from the side, and a pair of left and right back portions C13 that covers from the back side. C13 and an insertion surface portion C14 that enters the gap G from the front side. Then, by inserting the insertion surface portion C14 into the gap G while expanding the back surface portions C13 and C13 using elasticity, the front side indicated by the arrow a (in the direction perpendicular to the paper surface in FIG. 10A), the arrow b When viewed from the side indicated by the arrow and the back side indicated by the arrow c (in the direction perpendicular to the paper surface in FIG. 10B), the gap G is covered and the appearance is improved. .

  However, since it is the connecting member C1 made of an elastic body, the back surface portions C13 and C13 located on the lower side in the attached state may be deformed during long-term use due to their own weight, and in that case, the appearance from the back side Will be damaged. Therefore, there is a connector disclosed in Patent Document 2 as a connecting member that solves this problem. As shown in FIG. 12, the connecting member C2 for connecting the pair of headboards B1 and B2 in this case has a similar shape to the connecting member C1, and a hard material such as a wood material or a metal material is also applied. Since it is possible, the above-mentioned deformation problem is effectively solved and it can withstand long-term use.

Japanese Utility Model Publication No. 6-47453 Japanese Patent Laid-Open No. 2004-300766

  By the way, since the connecting members C1 and C2 are integrally formed, there is no adjustment allowance when the thickness of the headboards B1 and B2 varies. For example, as shown in FIG. If the thickness of B2 is thin, a gap G 'is generated between the back surface side of the connecting member C2 and the back surface portion C23 of the connecting member C2, resulting in a poorly connected connection portion, which eventually deteriorates the appearance.

  Then, this invention makes it a subject to provide the structure containing the headboard and the connecting member of a headboard with which good appearance is ensured over a long period of time.

  In order to solve the above problems, the present invention is configured as follows.

  That is, the present invention is a structure including a connecting member of the headboard that is wider than the end face that is attached to the end face of the staircase wall, and covers the gap between the opposite end faces of the pair of headboards to be connected from the front side. A pair of left and right side portions extending from both ends of the surface portion and covering the gap from both left and right sides, and a surface portion side extending from the surface portion toward the back side and entering the gap from the front side of the headboard A first member having an insertion surface portion; a pair of left and right rear surface portions that extend from the front end portion of the side surface portion and cover a portion exposed from the step wall surface of the gap from the back side; and extending from the back surface portion to the front side direction. A second insertion surface portion including an insertion portion that enters the portion exposed from the wall surface of the staircase wall of the gap and a back portion side insertion surface portion that extends from the insertion portion to the side opposite to the insertion portion. It includes a timber, and characterized.

  Here, in the structure including the head member of the present invention, the second member is formed separately from the first member. That is, the connecting member of the headboard of the present invention is composed of the first member and the second member. At this time, the second member is a pair of left and right members.

  Next, in the structure including the headboard connecting member of the present invention, the pair of left and right rear surface portions may be formed of a single member, and may have a rear surface side insertion surface portion that enters the gap. . In this case, the second member is a single member.

  Further, in the structure including the connecting member of the headboard of the present invention described above, the angle formed by the portions on both sides of the front surface side insertion surface portion on the back surface of the front surface portion corresponds to the angle formed by the connected headboard in a side view. Is preferably set.

  According to the present invention as set forth in claim 1, when the end face of the staircase wall is attached with a headboard wider than this, if a gap is generated between the opposing end faces of the pair of headboards to be coupled, In the connecting member used for connecting the headboard, the surface side insertion surface part enters the gap from the front side of the headboard and the mounting state is stable, and the surface part, the side part and the back part cover the gap, which is good A nicely connected part is realized. In addition, since the back surface portion is separate from the front surface portion, the side surface portion, and the front surface side insertion surface portion, the arrangement position can be adjusted in the front and back direction, and the fitting condition at the connecting portion of the headboard is improved. If the back surface portion is formed of a hard material, it becomes difficult to be deformed, and a good appearance is ensured over a long period of time.

  In addition, the connecting member of the headboard of the present invention has a rear surface side insertion surface portion that extends in the front side direction and enters the gap from the back side of the headboard, thereby contributing to further stabilization of the mounting state. In that case, since the back surface side insertion surface portion is composed of an insertion portion and an extension portion, and the extension portion extends in the left-right direction, the portion that enters the gap is increased, and the stabilization of the mounting state is further assisted. And it becomes effective in falling-off prevention by engaging with the end surface of a staircase wall.

  Further, in the headboard connecting member of the present invention, the pair of left and right rear surface portions may be joined by the insertion surface portion, and in this case, the portion that enters the gap is further increased and the stabilization of the mounting state is enhanced. The number of members can be small.

  And in the connecting member of the headboard of the present invention, the angle formed by the portions on both sides of the back surface side insertion surface portion on the back surface of the front surface portion of the connecting member corresponds to the angle formed by the connected headwood in a side view. Preferably, in this case, the degree of fit at the connecting portion of the headboard is further improved.

Embodiments of the present invention will be described below.
As shown in FIG. 1, a plurality of headboards 11 to 15 having a slightly wider plate shape than the end surface are attached to the end surface of the staircase wall 3 that partitions the corridor 1 side and the staircase 2 side. Further, the staircase wall 3 in the example has a slope corner indicated by an arrow X, a horizontal corner indicated by an arrow Y, and a vertical corner indicated by an arrow Z.

  At the gradient corner X, the headboard 11 on the vertical end face of the staircase wall 3 and the headboard 12 on the inclined end face are connected by the connecting member 20 in a state where the angle is usually 125 ° to 140 ° in a side view. At the horizontal corner Y, the headboard 13 on the horizontal end face of the staircase wall 3 and the headboard 14 on the horizontal end face are connected by another connecting member 30 in a L-shape in plan view. In the vertical corner Z, the headboard 14 on the horizontal end face of the staircase wall 3 and the headboard 15 on the vertical end face are connected by the connecting member 20 in an L-shape when viewed from the side.

  First, the connecting member 20 applied to the gradient corner X will be described. As shown in FIGS. 2 to 4, the connecting member 20 made of hard synthetic resin includes one first member 21 and two second members 22. 22.

  The first member 21 covers the gap G between the opposed end surfaces of the pair of headboards 11 and 12 attached to the end surface of the staircase wall 3 from the front side indicated by an arrow a (in the direction perpendicular to the paper surface in FIG. 2A). A surface portion 23, a pair of left and right side portions 24, 24 extending from both ends of the surface portion 23 and covering the gap G from the left and right sides indicated by arrows b, and extending from the surface portion 23 in the back side direction And a front surface side insertion surface portion 25 that enters the gap G from the front side, and these are integrally molded.

  In this case, the width dimension w1 of the first member 21 is set to a dimension that can cover the gap G. Moreover, the dimension of the front-and-back direction of the surface part side insertion surface part 25 is set smaller than the dimension of the end direction of the headboards 11 and 12 in the same direction. Moreover, the outer surface of the surface part 23 and the side surface parts 24 and 24 is made into the curved surface, and favorable touch is obtained.

  Then, the angle α formed by the portions 23a, 23a on both sides of the front surface side insertion surface portion 25 on the back surface of the front surface portion 23 of the first member 21 corresponds to the angle β formed by the connected caps 11, 12 in a side view. It is set (see FIG. 4). The angle α is equal to or less than the angle β, and in the illustrated example, the angle α is 90 ° and the angle β is 125 °. However, the first member 21 is applicable to an angle β of 90 ° to 140 °. ing. The angle β of 90 ° corresponds to the vertical corner Z shown in FIG.

  The pair of second members 22, 22 are arranged on the left and right sides so as to sandwich the staircase wall 3 on the back side of the first member 21, and each second member 22 is a distal end portion of the side surface portion 24 of the first member 21. A back surface portion 26 that covers from the back side indicated by an arrow c (in the direction perpendicular to the paper surface in FIG. 2B) and that is exposed from the wall surface of the staircase wall 3 of the gap G, and a front side direction from the back surface portion 26 And a back surface side insertion surface portion 27 that enters the gap G from the back side.

  In this case, the width dimension w2 of the second member 22 is set to a dimension that can cover the gap G, and is smaller than the width dimension w1 of the first member 21. Moreover, the back surface side insertion surface portion 27 has an insertion portion 27a that enters a portion exposed from the wall surface of the staircase wall 3 of the gap G, and an extension portion 27b that extends from the insertion portion 27a to the opposite side. And the dimension of the latter extension part 27b in the front and back direction is smaller than the former insertion part 27a and is offset to the front side, and the back surface side insertion surface part 27 is formed in an L shape in plan view. (See FIG. 3). Further, the outer surface of the back surface portion 26 is a curved surface (see FIG. 4).

  Then, in the state where the back surface portion 26 of each second member 22 is applied to the caps 11 and 12, the back surface side insertion surface portion 27 of each second member 22 is in the state where the surface portion 23 is applied to the caps 11 and 12. The dimensional relationship is set so as not to interfere with the front surface side insertion surface portion 25 of the one member 21. That is, in the mounted state, a slight gap is provided between the surface portion side insertion surface portion 25 of the first member 21 and the surface portion side insertion surface portion 27 of the second member 22 that are opposed to each other.

  An example of the arrangement method of the second member 22 will be described with reference to FIG. In other words, the surface portion 23 of the first member 21 is assigned to the headboards 11 and 12 on the staircase wall 3 from the front side. In the case shown in FIG. 5 (a), the second member 22 has a back surface portion 26 that is firmly attached to the caps 11 and 12 from the back side. The first member 21 does not protrude from the front end portion of the side surface portion 24 in the back side direction, and is slightly intruded. On the other hand, in the case shown in FIG. 5B, the back surface portion 26 of the second member 22 is not applied to the caps 11 and 12, but as shown by black triangle marks, the side surface portion 24 of the first member 21. It is aligned with the tip of the. This utilizes the fact that the back surface side insertion surface portion 27 of the second member 22 is formed in the above-described L-shape in plan view, and either method can be employed. In the case of FIG. 5B, the back surface portion 26 of the second member 22 includes the back surface side insertion surface portion 27 that enters the clearance G between the caps 11 and 12, so that the clearance as shown in FIG. G 'is blocked by the back surface side insertion surface portion 27, and does not impair the appearance.

  Next, a modified example of the connecting member will be described. As shown in FIG. 6, the connecting member 20 ′ made of hard synthetic resin in this case is an opposing end face of a pair of headboards 11 and 12 attached to the end face of the staircase wall 3. A surface portion 23 that covers the gap G (not shown) between the front side indicated by an arrow a, and a pair of left and right sides extending from both ends of the surface portion 23 and covering the gap G from both the left and right sides indicated by arrows b The first member 21 having the side surface portions 24, 24, the surface portion side insertion surface portion 25 extending in the back side direction from the surface portion 23 and entering the gap G from the front side, and a second member having a new configuration 22 '.

  The second member 22 'is formed of a single member, and a pair of left and right portions 26' and 26 'that covers a portion exposed from the staircase wall 3 of the gap G from the back side indicated by an arrow c, and the gap from the back side. And a back surface side insertion surface portion 27 ′ that enters G.

  Next, the connecting member 30 applied to the horizontal corner Y will be described. As shown in FIGS. 7 to 9, the connecting member 30 made of hard synthetic resin includes one first member 31 and two second members 32. , 32 ″.

  The first member 31 includes a surface portion 33 that covers the gap G between the opposing end surfaces of the pair of headboards 13 and 14 attached to the end surface of the staircase wall 3 from the front side indicated by an arrow a, and extends from both end portions of the surface portion 33. A pair of left and right side portions 34, 34 ″ that respectively cover the gap G from both the left and right sides indicated by arrows b, and a surface portion side insertion that extends from the surface portion 33 toward the back side and enters the gap G from the front side. And a surface portion 35.

  In this case, the width dimension w1 of the first member 31 is set to a dimension that can cover the gap G. Moreover, the dimension of the front-and-back direction of the surface part side insertion surface part 35 is set considerably smaller than the dimension of the same direction of the end surfaces of the headboards 13 and 14. Moreover, the outer surface of the surface part 33 is made into the curved surface, and favorable touch is obtained. Further, the side surface portions 34, 34 ″ have different shapes on the protruding corner side (left side in FIG. 7) and the entering corner side (also on the right side), and the side surface portion 34 on the protruding corner side has a curved outer surface. In addition, a concave portion is provided on the inner surface, and the side surface portion 34 ″ on the corner side has a flat outer surface and a convex portion on the inner surface (see FIG. 9).

  As in the case of the gradient corner X, the angle α formed by the portions 33a and 33a on both sides of the front surface side insertion surface portion 35 on the back surface of the front surface portion 33 of the first member 31 is the same as that of the headboards 13 and 14 to be connected. (See FIG. 8). That is, in this case, the angle α is 180 °, and the angle β is also 180 °.

  The pair of second members 32, 32 ″ are arranged on the left and right sides so as to sandwich the staircase wall 3 on the back side of the first member 31, and each second member 32, 32 ″ is a side portion of the first member 31. 34, 34 ″ extending from the front end portion of the gap G and exposing the portion exposed from the wall surface of the stepped wall 3 of the gap G from the back side indicated by the arrow c, and from the back side portions 36, 36 ″ to the front side direction There are back surface side insertion surface portions 37, 37 ″ that extend and enter the gap G from the back side.

  In that case, the width dimension w2 of the second member 32, 32 ″ is set to a dimension that can cover the gap G, and is smaller than the width dimension w1 of the first member 31 (see FIG. 2 member 32 ″). Further, the back surface side insertion surface portions 37 and 37 ″ extend to the opposite side from the insertion portions 37a and 37a ″ that enter the exposed portion of the gap G from the wall surface of the staircase wall 3 and the insertion portions 37a and 37a ″. The extension portions 37b and 37b ″ have a size in the front and back direction of the latter extension portions 37b and 37b ″, which is smaller than the former insertion portions 37a and 37a ″ and offset to the front side. This is the same as the second member 22 (see FIG. 7). Further, the outer surfaces of the back surface portions 36, 36 ″ are flat, and both end shapes of the outer surfaces substantially correspond to the shape of the staircase wall 3 and the inner surface shapes of both side surface portions 34, 34 ″ of the first member 31. (Refer to FIG. 9).

  Then, with the back surface portions 36, 36 "of the second members 32, 32" being applied to the headboards 13, 14, the back surface side insertion surface portions 37, 37 "of the second members 32, 32" are surface portions. The dimensional relationship is set so as not to interfere with the front surface side insertion surface portion 35 of the first member 31 in a state where 33 is applied to the caps 13 and 14. That is, in the mounted state, a slight gap is provided between the front surface side insertion surface portion 35 of the first member 31 and the back surface side insertion surface portions 37, 37 ″ of the second members 32, 32 ″. Yes.

  Here, as an example, a procedure for attaching the caps 11 and 12 and the connecting member 20 at the gradient corner X will be described. Note that an adhesive is used for the fixing operation of the members 11, 12, and 20.

  First, as shown in FIG. 1, the headboard 11 is fixed to the vertical end face of the staircase wall 3, and the first and second members 21, 22, and 22 constituting the connecting member 20 are fixed to the connecting end face of the headboard 11. . In that case, as shown in FIGS. 3, 4, and 5 (a), the front surface portion 23 of the first member 21 is applied to the front side of the headboard 11, and the back surface portions 26 and 26 of the second members 22 and 22 are disposed. The front surface side insertion surface portion 25 and the back surface side insertion surface portions 27 and 27 are fixed to the connecting end surface of the headboard 11 by being placed on the back side of the headboard 11.

  Then, as shown in FIGS. 1 and 4, the connecting end surface of the headboard 12 on the other inclined end surface side is inserted into the front surface side insertion surface portion 25 of the first member 21 and the rear surface portion side of the second members 22 and 22. It fixes to the surface parts 27 and 27.

  Further, another mounting procedure will be described. The headboard 11 is formed on the vertical end surface of the staircase wall 3, the headboard 12 is formed on the inclined end surface, and the surface portion side insertion surface portion 25 of the first member 21 and the second members 22, 22 are disposed between the opposite end surfaces. The back surface side insertion surface portions 27, 27 are fixed with a gap G so that they can be inserted.

  Then, as understood with reference to FIG. 3, after the pair of second members 22, 22 are fixed by inserting the back surface side insertion surface portions 27, 27 into the gap G from the left and right sides indicated by arrows b. Then, the first member 21 is fixed by inserting the surface portion side insertion surface portion 25 into the gap G from the front side indicated by the arrow a until the surface portion 23 and the caps 11 and 12 come into contact with each other.

  By having comprised as mentioned above, when the headboards 11-15 wider than this are attached to the end surface of the staircase wall 3, the clearance gap G arises between the opposing end surfaces of a pair of headboards 11-15 connected. Although it does not look good, in the connecting members 20, 20 ', 30 used for connecting the caps 11-15, the surface side insertion surface portions 25, 35 enter the gap G from the front side of the caps 11-15 and the mounting state is stable. In addition, since the front surface portions 23, 33, the side surface portions 24, 34, 34 "and the back surface portions 26, 26 ', 36, 36" cover the gap G, the connecting portions X to Z having a good appearance are realized. To do. Further, the rear surface portions 26, 26 ', 36, 36 "are separated from the front surface portions 23, 33, the side surface portions 24, 34, 34", and the front surface side insertion surface portions 25, 35. The position can be adjusted in the front and back direction, and the degree of fit at the connecting points X to Z of the caps 11 to 15 is improved. And since the back surface portions 26, 26 ', 36, and 36 "are made of a hard material, they are difficult to be deformed, and a good appearance is ensured over a long period of time.

  As shown in FIGS. 3 and 7, the back surface portions 26, 36, and 36 ″ are extended in the front side direction, and the back surface portion side insertion surface portion 27 (27 a) that enters the gap G from the back surface of the caps 11 to 14. , 37 (37a), 37 ″ (37a ″) contributes to further stabilization of the mounting state.

  In that case, since the back surface side insertion surface portions 27, 37, and 37 ″ further extend in the left-right direction, the portions 27b, 37b, and 37b ″ that enter the gap G are increased, and the stabilization of the mounting state is further assisted. Engaging with the end face of the staircase wall 3 is effective in preventing the dropout.

  On the other hand, as shown in FIG. 6, when the pair of left and right portions 26 'and 26' and the back surface side insertion surface portion 27 'are formed of a single member, the portion that enters the gap G is further increased. The stabilization of the state is enhanced and the number of members can be reduced. In this case, since the back surface side insertion surface portion 27 ′ is securely locked by the end surface of the staircase wall 3, the second member 22 ′ is not dropped after being attached.

  As shown in FIGS. 1, 4, and 8, the portions 23 a, 23 a, 33 a, 33 a on both sides of the front surface side insertion surface portions 25, 35 on the back surface of the surface portions 23, 33 of the connecting members 20, 30 are provided. Since the angle α formed corresponds to the angle β formed by the connected caps 11 to 15 in a side view, the fit of the caps 11 to 15 at the connecting points X to Z is further improved.

  It should be noted that the present invention is not limited to the above-described embodiment that has been specifically described in detail, and may be any that are within the spirit of the present invention.

  For example, the connecting members 20, 20 ′, 30 according to the present invention can be applied to a straight portion in addition to the gradient corner X, the horizontal corner Y, and the vertical corner Z shown in FIG.

  In the above embodiment, the connecting members 20, 20 ', 30 are made of hard synthetic resin, but only the second members 22, 22', 32, 32 "may be made of hard synthetic resin. The material is not limited to a synthetic resin material, and may be hard. For example, in addition to a synthetic resin material, a wood material, a metal material, and a combination thereof may be used.

  As described above, according to the present invention, there is provided a headboard connecting member that ensures a good appearance over a long period of time. The present invention is widely suitable for the technical field of staircase members.

It is a perspective view which shows the connection state of the headboard by the connection member which concerns on embodiment of this invention. The connection state in a gradient corner is shown, (a) is the figure seen from the front side, (b) is the figure seen from the back side. It is a top view of a connection member similarly. It is an expanded sectional view by the II-II line of FIG. The top view which expands and shows a part for demonstrating the example of the arrangement | positioning method from which a 2nd member differs, (a) when a back surface part is applied to a coping, (b) is a side surface of a back surface part and a 1st member. This is a case where the front end of the part is aligned. It is a top view equivalent to FIG. 3 which shows the modification of a 2nd member. It is a top view of the connection member applied to a horizontal corner. It is an expanded sectional view by the III-III line of FIG. It is the perspective view which looked at the connection state of a headboard from the back side, (a) is a protruding corner part, (b) is an entering corner part. The connection state of the headboard by the conventional connection member is shown, (a) is the figure seen from the front side, (b) is the figure seen from the back side. It is a top view of a connection member similarly. It is a top view of another conventional connection member.

3 Staircase walls 11 to 15 Kasaki 20, 20 ', 30 Connecting member 23, 33 Surface portion 24, 34, 34 "Side surface portion 25, 35 Surface portion side insertion surface portion (insertion surface portion extended to the surface portion)
26, 26 ', 36, 36 "back surface portion 27, 27', 37, 37" back surface side insertion surface portion (insertion surface portion extended to the back surface portion)
G gap

Claims (3)

A surface portion that covers from the front side the gap between the opposed end faces of a pair of headboards to be connected,
A pair of left and right side portions extending from both ends of the surface portion and covering the gap from both left and right sides, and a surface portion side insertion extending from the surface portion toward the back side and entering the gap from the front side of the headboard Face part,
A first member having:
A pair of left and right back surfaces extending from the back side of the gap and covering the exposed portion of the gap from the wall surface of the staircase wall from the back side, and extending from the back side to the front side, the gap from the back side of the headboard An insertion portion that enters a portion exposed from the wall surface of the staircase wall, and a back surface side insertion surface portion that includes an extended portion that extends to the opposite side from the insertion portion,
A second member having
A coupling member of the headboard wider than the end face attached to the end face of the staircase wall;
And
A headboard on a vertical end face of the staircase wall and a headboard on an inclined end face connected in an angle of 125 to 140 ° in a side view through the connecting member of the headboard;
Including structure. A surface portion that covers from the front side the gap between the opposed end faces of a pair of headboards to be connected,
A pair of left and right side portions extending from both ends of the surface portion and covering the gap from both left and right sides, and a surface portion side insertion extending from the surface portion toward the back side and entering the gap from the front side of the headboard Face part,
A first member having:
A pair of left and right back surfaces extending from the back side of the gap and covering the exposed portion of the gap from the wall surface of the staircase wall from the back side, and extending from the back side to the front side, the gap from the back side of the headboard An insertion portion that enters a portion exposed from the wall surface of the staircase wall, and a back surface side insertion surface portion that includes an extended portion that extends to the opposite side from the insertion portion,
A second member having
A coupling member of the headboard wider than the end face attached to the end face of the staircase wall;
And
Two headboards on the horizontal end face of the staircase wall connected in an L shape in plan view through the headboard connecting member;
Including structure. A surface portion that covers from the front side the gap between the opposed end faces of a pair of headboards to be connected,
A pair of left and right side portions extending from both ends of the surface portion and covering the gap from both left and right sides, and a surface portion side insertion extending from the surface portion toward the back side and entering the gap from the front side of the headboard Face part,
A first member having:
A pair of left and right back surfaces extending from the back side of the gap and covering the exposed portion of the gap from the wall surface of the staircase wall from the back side, and extending from the back side to the front side, the gap from the back side of the headboard An insertion portion that enters a portion exposed from the wall surface of the staircase wall, and a back surface side insertion surface portion that includes an extended portion that extends to the opposite side from the insertion portion,
A second member having
A coupling member of the headboard wider than the end face attached to the end face of the staircase wall;
And
A headboard on the horizontal end face of the staircase wall and a headboard on the vertical end face connected in an L shape in a side view through the connecting member of the headboard;
Including structure.

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