JP2016089355A - Stair junction structure and stair construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stair junction structure and a stair construction method capable of constructing in ascending order from a lower level without coming and going between a front side and a rear side of the stairs during construction and generating less clearance between a footboard and a riser.SOLUTION: A footboard 20 comprises: a cutout part 21 formed by cutting a rear upper face of the footboard 20; a first sliding part 22 formed at an upper rear end of the footboard 20; an edge part 23 at angle of 90 degrees or less consisting of the cutout part 21 and an upper face of the footboard 20 in front of the cutout part 21. The riser 30 comprises a second sliding part 31 formed on a lower rear end of the riser 30; a projection 32, which is a lower front part of the riser 30 protruding downward and can be stored in the cutout part 21 of the footboard 20; and a vertical face part 33, which is at least a part of a front end of the projection 32 contacting to the edge part 23 of the footboard 20 and is a vertical face. At least one of the first sliding part 22 of the footboard 20 and the second sliding part 31 of the riser 30 inclines downward from the rear side to the front side.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a staircase junction structure and a staircase construction method in which a horizontal tread plate and a kick plate that is in contact with a rear portion of the tread plate and extends vertically upward are joined.

Regarding the structure of stairs (wooden stairs) using a wooden base material used in ordinary houses, there are a box-type stairs, a platform stairs, and exposed stairs.
Except for the exposed stairs, it is common to use a kick plate between the upper and lower treads. The kick plate is used to conceal the back of the staircase, has a thickness of about 5 to 12 mm, and does not contribute much to the strength of the staircase itself. Therefore, thick and sturdy materials with a thickness of about 30 to 40 mm are used for members responsible for staircase structures such as treads, side plates, and sasara girders. On the other hand, the kick plate is usually fixed to a level with a nail (see, for example, Patent Documents 1 and 2).

In a general straight box-type staircase, construction is performed in the following procedure (see FIGS. 11 to 13).
(A) As shown in FIG. 11, the attachment groove 4 for attaching the tread plate 2 and the kick plate 3 to the side plate 1 is processed. At this time, the width of the mounting groove 4 of the tread plate 2 is slightly wider than the thickness of the tread plate 2. Further, a groove 5 into which the upper end portion of the kick plate 3 is inserted is processed on the front back surface of the tread plate 2.
(B) Install 12 side plates from the first floor to the second floor of the building.
(C) As shown in FIG. 12, the tread plate 2 is constructed so as to match the mounting groove 4 processed in the side plate 1 from the back side of the staircase (right side in FIG. 12).
(D) From the back side of the staircase, a wedge 6 is inserted and fixed between the tread board 2 and the mounting groove 4 (FIG. 13). The wedge 6 is fixed to the side plate 1 with a small nail or the like (not shown) so as not to come off. As a result, the tread board 2 is firmly fixed.
(E) From the back side of the stairs, the kick plate 3 is constructed so as to match the mounting groove 4 processed in the side plate 1. The kick plate 3 is erected so as to contact the rear end surface of the tread plate 2.
(F) From the back side of the stairs, the kick plate 3 is fixed with the nail 7, and the kick plate 3 and the tread plate 2 are joined.
(G) Thereafter, (c) to (f) are repeated.
In addition to the above procedure, (b) is omitted, and in some cases, construction is performed at a predetermined position by using a crane or the like finally with the stairs assembled.

In the case of a straight platform staircase, construction is performed according to the following procedure.
(A) As shown in FIG. 14, sawtooth processing 9 is performed on the sasara girder 8 in accordance with the shape of the tread plate 2 and the kick plate 3.
(B) Install 8 Sasara girders from the first floor to the second floor.
(C) The kick plate 3 is installed on the sawtooth processing vertical surface 10 of the sasara girder 8 from the lower stage on the stair surface side.
(D) From the stair surface side, the tread board 2 is installed on the sawtooth processed horizontal surface 11 of the sasara girder 8 (FIG. 15).
(E) The kick board 3 is fixed with the nail 7 from the back side of the stairs (FIG. 16).
(F) Thereafter, (c) to (e) are repeated toward the upper stage.

Here, in the box-type stairs, the construction of the tread board 2 and the kick board 3 is basically construction from the back side of the stairs. If the height is in the range of about 1 to 2 m, you can work without taking an unreasonable posture, but the first and second steps of the tread board 2 are located about 50 cm from the floor, so the operator lies on the floor. Is forced to work in an unreasonable posture. On the other hand, when the height is 2 m or more, the hand cannot be reached, so it is necessary to work on a work platform such as a stepladder.
In addition, since the wall on the back side of the staircase is inclined, it is rarely used for a living room, and is usually used for storing toilets or closets. These operations in confined spaces are difficult to carry in the stepladder, and may be forced into an unnatural posture, which is extremely painful for the operator and also causes the danger of dropping from the stepladder. there were.

  In addition, when the kick board 3 in the back is first constructed and then the front tread 2 is constructed, there is no problem in the lower stage, but in the vicinity of the uppermost stage, the kick board 3 is placed in the far side by one tread board 2. Since it must be installed in the position, the posture may become unstable.

Because of these problems, various structures as shown below have been developed.
(A) The kick board 3 is installed on the upper surface of the tread board 2 (see FIG. 17).
By placing the kick plate 3 on the upper surface of the tread board 2, it is no longer necessary to hit a nail from the back of the stairs. Thereby, construction can be performed very easily and quickly. In particular, it is said that it is often used on the platform staircase because of the ease of construction.

(B) A notch 13 is provided on the rear end of the upper surface of the tread plate 2 and the kick plate 3 is installed here (see FIG. 18).
A notch 13 is provided in the tread plate 2, the kick plate 3 is constructed after the tread plate 2 is constructed, and the nail 7 is driven. According to this method, it is possible to work without difficulty from the bottom in the order of the tread board 2, the kick board 3, the tread board 2, the kick board 3.
(C) A groove 14 into which the lower end of the kick plate 3 enters is formed on the upper surface of the tread plate 2 (see, for example, Patent Document 3 and FIG. 19).
A groove 14 into which the lower end portion of the kick plate 3 enters is provided in the tread plate 2, and the lower end of the kick plate 3 is inserted into the groove 14. In this case, as in the case of B, construction can be performed in order from the bottom in the order of the tread board 2, the kick board 3, the tread board 2, the kick board 3. Moreover, there is no need for construction from the back of the stairs.

Japanese Patent No. 3287823 Japanese Utility Model Publication No. 52-22626 Japanese Utility Model Publication No. 3-26831

However, there are the following problems even with the staircase junction structure (A) to (C).
(1) A gap 12 is generated between the step board 2 and the kick board 3 (A, B, C).
Since the joint portion between the step board 2 and the kick board 3 is always located at the height of the user's eyes when the user goes up the stairs, the gap 12 between the step board 2 and the kick board 3 is often noticeable and unsightly.
In order to prevent such a gap 12 from being generated at the time of construction, a skill that is skilled in construction is required, and it takes a long time for a worker with little experience.
In addition, after construction, there is no support member on the back side (rear part) of the tread board 2 for both the box-shaped staircase and the platform staircase, so when the user moves up and down the staircase, a certain amount of bending occurs in the tread board 2 due to the weight of the user, A gap 12 may occur between the kick plate 3 (see FIGS. 20 and 21A).
Although it may be lightly fixed with the long and narrow nail 7 from the back surface of the tread board 2 as shown in FIG.
Further, when there is a foot collision described later with respect to the kick plate 3, even if the nail 7 is used as in A and B, the nail 7 is loosened and floats, and a gap 12 is generated (FIG. 22 and FIG. 22). (See FIG. 23).
On the other hand, when the nail 7 is not used as in C, the kick plate 3 easily moves backward by the play amount of the groove 14 of the tread plate 2 at the time of collision, and a gap 12 is generated (see FIG. 24).

(2) Sensitive to collision A child's mischief or even an adult may accidentally kick the kick board 3 when going up the stairs. In general, when the kick plate 3 is applied in a painted state, the painted surface of the kick plate 3 is in contact with the end of the tread plate 2, so that it is sufficient to apply an inexpensive adhesive that is normally used here. Can't adhere to. On the other hand, an ethylene-modified vinyl acetate resin emulsion adhesive or the like that can be bonded even on a painted surface is expensive.
Also, since the construction time is usually shortened, the kick plate 3 is simply fixed to the tread plate 2 with a simple fixing means such as a nail 7, so that the fixing strength is low and the nail 7 is easily detached and removed. There are many. Even if the nail 7 does not come out, if the nail 7 is loosened, the gap 12 is conspicuous.
If a screw is used instead of the nail 7, it can be firmly fixed and the generation of the gap 12 can be suppressed. However, the screw is more expensive than the nail 7, and the construction time is several times (using a dedicated machine, the nail 7 Is 1 to 2 seconds, and the screw is 10 to 20 seconds).

  Therefore, the object of the present invention is that the construction of the staircase can be constructed in order from the bottom without going back and forth between the front and back sides of the staircase during construction, and the gap between the tread board and the kick board is less likely to occur. The purpose is to provide a method for constructing stairs.

  In order to achieve the above object, a staircase junction structure according to claim 1 of the present invention includes a horizontally disposed tread plate (20) and a kick plate extending vertically upward in contact with a rear portion of the tread plate (20). In the staircase joining structure formed by joining (30), the tread plate (20) includes a notch portion (21) in which a rear upper surface of the tread plate (20) is notched and the notch portion (21). Are formed, a first sliding part (22) provided at the upper rear end of the tread (20), the notch (21) and the tread (20) in front of the notch (21). And an edge portion (23) having an angle of 90 ° or less formed by the upper surface of the top plate, and the kick plate (30) is provided at a lower rear end of the kick plate (30). A second sliding portion (31) in contact with the first sliding portion (22), and the kick plate ( 0) a lower front portion projects downward and can be accommodated in a notch (21) of the tread (20), and the projecting portion that contacts the edge (23) of the tread (20) A vertical surface portion (33) that is at least a part of the front end of (32) and is a vertical surface, and the first sliding portion (22) of the tread plate (20) and the second of the kick plate (30) At least one of the two sliding portions (31) is inclined downward from the rear to the front.

  The staircase joining structure according to claim 2 is such that the first sliding portion (22) of the tread (20) is inclined downward from the rear to the front and the second of the kick plate (30). The sliding portion (31) is in contact with the first sliding portion (22) of the tread plate (20) at a point in a sectional view.

  The staircase joining structure according to claim 3 is characterized in that the rear surface of the main body of the kick plate (30) is substantially flush with the rear end surface of the tread plate (20).

  Further, in the staircase joining structure according to claim 4, the angle of the edge portion (23) of the tread plate (20) is 90 °, and the front surface of the protruding portion (32) of the kick plate (30) is The bottom of the protrusion (32) is flush with the front surface of the main body of the kick plate (30).

  The staircase construction method according to claim 5 is a first step provided at the upper rear end by forming a notch (21) in which a rear upper surface is notched and the notch (21). A tread (20) having a sliding portion (22), and an edge portion (23) formed by an upper surface on the front side of the notch portion (21) and the notch portion (21) of 90 ° or less. A second sliding portion (31) provided at the lower rear end and in contact with the first sliding portion (22) of the tread (20), and a notch ( 21) a projecting part (32) that can be accommodated in the inside, and a vertical surface part that is at least a part of the front end of the projecting part (32) that contacts the edge part (23) of the tread (20) and is a vertical surface (33), and a first sliding part (2) of the tread (20). ) And the second sliding part (31) of the kick plate (30) is a construction method of a staircase in which at least one is inclined downward from the rear toward the front, and the step plate (20) disposed horizontally The projecting portion (32) of the kick plate (30) is fitted into the notch portion (21) from above, and the second sliding portion (31) of the kick plate (30) is fitted to the tread plate (20). The abutment plate (30) is slid downward and forward by contacting the first sliding portion (22), and the vertical surface portion (33) of the kick plate (30) is moved to the edge of the tread plate (20). It is made to contact | abut to a part (23).

  Moreover, the construction method of the staircase described in claim 6 is characterized in that the kick plate (30) is not directly fixed to the tread plate (20).

  Here, the symbols in the parentheses indicate corresponding elements or corresponding matters described in the drawings and the embodiments for carrying out the invention described later.

According to the staircase junction structure according to claim 1 of the present invention, at least one of the first sliding portion of the tread plate and the second sliding portion of the kick plate is inclined downward from the rear to the front. Therefore, at the time of construction, the second sliding portion of the kick plate slides with the first sliding portion of the tread plate, so that the kick plate moves downward and forward. Then, at the position where the vertical surface portion of the kick plate abuts against the edge portion of the tread plate, the protruding portion of the kick plate is accommodated in the notch portion of the tread plate and the kick plate is positioned with respect to the tread plate. It is difficult to create a gap between them.
In this way, even an inexperienced operator can easily and accurately arrange the kick plate, so that the construction time can be shortened.
Moreover, if the length of the protrusion part of a kick board is set longer than the bending amount of a tread board produced when a user raises / lowers a staircase, it will be hard to produce a clearance gap after construction.

  In addition, at least one of the first sliding portion of the tread plate and the second sliding portion of the kick plate is inclined downward from the rear to the front, in other words, upward from the front to the rear. It is inclined. Therefore, since the upward inclination receives the impact at the time of the collision received by the kick plate, the kick plate is strong against the collision and the kick plate is difficult to move backward. As a result, it is difficult to generate a gap between the tread board and the kick board. Although it is strong against a collision in this way, it only needs to cut the tread plate and the kick plate, so that the construction time does not increase and the cost can be reduced.

Moreover, since the notch is formed in the upper part of the tread board, it can be constructed from the front side of the stairs and from the lower stage in order, and the operator can work by using unstable stepladders or crawling near the floor surface. There is no need to perform the operation, and the worker can get on the tread board he has constructed and can work safely without any unreasonable posture. The construction from the lower stage is the work from the lower stage completely in the order of the tread board, the kick board, the tread board, and the kick board, and the conventional one-stage kick board, tread board, one step ahead kick board, one stage lower Since there is no space for one step like the treads, safety is even higher.
In addition, since it is not necessary to move between the front side and the back side of the staircase during construction, which is common practice in conventional staircase construction, work efficiency is very high.

  Moreover, according to the joining structure of the staircase of Claim 2, in addition to the effect of the invention of Claim 1, the 2nd sliding part of a kick board is a cross-sectional view in the 1st sliding part of a tread board. Since the contact is made at a point, the frictional force is not so high and the sliding is smoothly performed, and the kick plate is appropriately positioned with respect to the tread.

  Further, according to the staircase junction structure according to claim 3, in addition to the function and effect of the invention according to claim 1 or 2, since the rear surface of the main body of the kick plate is substantially flush with the rear end surface of the tread plate, The effective area of the tread board in front of the kick board is widened, and the waste of the material at the rear end portion of the tread board that does not contribute to the effective area is minimized.

According to the staircase junction structure according to claim 4, in addition to the operational effects of the invention according to claims 1 to 3, the front surface of the protrusion of the kick plate extends to the lower end of the protrusion. Since there is a wide allowable range where the edge portion of the tread plate abuts and the angle of the edge portion of the tread plate is 90 °, a gap between the tread plate and the kick plate is less likely to occur.
Furthermore, when the front surface of the notch portion of the tread plate is vertical, the contact surface between the front surface of the protruding portion of the kick plate and the front surface of the notch portion of the tread plate becomes wide, so that the fixed (joined) state is stabilized. .

  Moreover, according to the construction method of the staircase of Claim 5, while inserting the protrusion part of a kick board from upper direction with respect to the notch part of the horizontally arranged tread board, the 2nd sliding part of a kick board is made into the step board's Since the kick plate is slid downward and forward by contacting the first sliding portion and the vertical surface portion of the kick plate is brought into contact with the edge portion of the tread plate, even an inexperienced operator can accurately In addition, the kick plate can be easily arranged, and a gap is hardly generated between the tread plate and the kick plate. Moreover, since the positioning of the kick plate is easy, the construction time can be shortened even if it is not an expert.

Moreover, according to the construction method of the staircase of Claim 6, in addition to the effect of the invention of Claim 5, since a kick board is not directly fixed with respect to a tread, the bending of the tread which arises by the raising / lowering after construction The squeaking sound (stepping sound) due to is suppressed. In other words, when a load is applied to the tread, the tread will try to move away from the kick plate, and a squeaking noise will be generated at that time. , It is hard to generate itchiness.
Further, since it is not fixed with a nail or an adhesive, there is no need to worry about deterioration, breakage, or peeling of these fixing means.

  In addition, like the staircase joining structure and the staircase construction method of the present invention, the kick plate has a protruding portion, and at least one of the first sliding portion of the tread plate and the second sliding portion of the kick plate, The points that incline downward from the rear toward the front are not described in Patent Documents 1 to 3 described above.

It is sectional drawing which shows the joining structure of the staircase which concerns on 1st embodiment of this invention, (a) shows before construction, (b) shows after construction, respectively. It is sectional drawing which shows the junction structure of the staircase concerning 2nd embodiment of this invention, (a) shows before construction, (b) shows after construction, respectively. It is sectional drawing which shows the joining structure of the staircase concerning 3rd embodiment of this invention, (a) shows before construction, (b) shows after construction, respectively. It is sectional drawing which shows the joining structure of the staircase which concerns on 4th embodiment of this invention, (a) shows before construction, (b) shows after construction, respectively. It is sectional drawing which shows the joining structure of the staircase which concerns on other embodiment of this invention, (a) shows before construction, (b) shows after construction, respectively. It is sectional drawing which shows the joining structure of the staircase concerning other embodiment of this invention, (a) shows before construction, (b) shows after construction, respectively. It is sectional drawing which shows the joining structure of the staircase concerning other embodiment of this invention, (a) shows before construction, (b) shows after construction, respectively. It is sectional drawing which shows the joining structure of the staircase concerning other embodiment of this invention, (a) shows before construction, (b) shows after construction, respectively. It is sectional drawing which shows the joining structure of the staircase concerning other embodiment of this invention, (a) shows before construction, (b) shows after construction, respectively. It is sectional drawing which shows the joining structure of the staircase concerning other embodiment of this invention, (a) shows before construction, (b) shows after construction, respectively. It is a figure which shows the side plate of the box-shaped staircase which concerns on a prior art example. It is a side view which shows the state which constructs a tread board and a kick board to the box-shaped staircase which concerns on a prior art example. It is the elements on larger scale of the principal part in FIG. It is a figure which shows the sasara girder of the platform staircase which concerns on a prior art example. It is a side view which shows the state which constructs a tread board and a kick board in the platform step which concerns on a prior art example. It is the elements on larger scale of the principal part in FIG. It is a side view which shows the joining structure of the foot board and kick board which concern on a prior art example. It is a side view which shows the joining structure of the tread board and kick board which concerns on another prior art example. It is a side view which shows the joining structure of the tread board and kick board concerning another prior art example. It is a perspective view which shows the state which the tread of the staircase concerning a prior art example bent. (A) is a side view showing a state in which a gap is generated between the tread board and the kick board in the conventional example of FIG. 17, and (b) is a state in which a nail is struck from the back surface of the tread board to prevent the gap. FIG. It is a side view which shows the state which the clearance gap produced between the tread board and the kick board in the prior art example of FIG. It is a side view which shows the state which the clearance gap produced between the tread board and the kick board in the prior art example of FIG. FIG. 20 is a side view showing a state where a gap is generated between the tread board and the kick board in the conventional example of FIG. 19.

(First embodiment)
With reference to FIG. 1, the joining structure of the staircase and the construction method of the staircase according to the first embodiment of the present invention will be described.
This staircase includes a tread board 20 and a kick board 30.

The step board 20 is formed by cutting a plate having a rectangular cross section, and includes a notch portion 21, a first sliding portion 22, and an edge portion 23.
The notch 21 is formed by notching the rear upper surface of the tread plate 20. The cutout portion 21 is formed by communicating a rectangular groove 21a and a triangular groove 21b in a sectional view.
The rear end of the notch 21 (triangular groove 21b) is inclined downward from the rear toward the front, starting from the upper end and the rear end of the tread plate 20 before notching. By forming the notch portion 21 in this way, the first sliding portion 22 that is a slope portion is provided at the upper rear end of the tread plate 20.
Further, the depth of the rectangular groove 21a is deeper than the depth of the triangular groove 21b (in the thickness direction of the tread plate 20).
The angle formed by the upper surface of the tread 20 on the front side of the notch 21 (rectangular groove 21a) and the notch 21 (rectangular groove 21a) is 90 °, which is referred to as an edge portion 23.
Further, the distance from the rear end surface of the tread plate 20 to the front end of the notch 21 is slightly longer than the thickness of the kick plate 30.

The kick plate 30 is formed by cutting the lower end of a plate having a rectangular cross section, and includes a second sliding portion 31 and a protruding portion 32.
The second sliding portion 31 is formed by cutting the lower rear end of the kick plate 30 into a rectangular shape and comes into contact with the first sliding portion 22 of the tread plate 20. The cut width is approximately half of the thickness of the kick plate 30.
The protruding portion 32 is a portion in which the lower front portion of the kick plate 30 protrudes relatively downward by the cutting of the kick plate 30.
The width of the projecting portion 32 is equal to or smaller than the width of the rectangular groove 21a of the tread plate 20, and the projecting portion 32 can be accommodated in the cutout portion 21 of the tread plate 20, as shown in FIG. In this figure, since the width of the protrusion 32 is substantially equal to the width of the rectangular groove 21a of the tread plate 20, there is almost no play between them.

The front end of the protrusion 32 is a vertical surface portion 33 that is a vertical surface, and the protrusion 32 protrudes downward without protruding forward from the vertical surface portion 33. That is, the front surface of the protrusion 32 of the kick plate 30 is flush with the front surface of the main body of the kick plate 30 up to the lower end of the protrusion 32. When the second sliding portion 31 comes into contact with the first sliding portion 22 of the tread plate 20 at a point in cross section, the vertical surface portion 33 simultaneously comes into contact with the edge portion 23 of the tread plate 20 (in FIG. 1B). (See the dashed circle.)
Thus, when the 2nd sliding part 31 contact | abuts to the 1st sliding part 22 of the tread 20, the lower end of the protrusion part 32 is spaced apart from the bottom face of the notch part 21 (rectangular groove 21a). That is, the situation cannot be such that the lower end of the projecting portion 32 contacts the bottom surface of the notch portion 21 of the tread plate 20 and the second sliding portion 31 and the first sliding portion 22 do not contact.
Moreover, the length from the vertical surface part 33 of the protrusion part 32 to the lower end of the protrusion part 32 is longer than the amount of bending (maximum amount of bending) of the center part of the tread plate 20 that occurs when the user moves up and down the stairs.

Next, the construction method of this staircase is demonstrated.
First, the tread plate 20 in which the notch portion 21 is formed is disposed horizontally.
Then, the protruding portion 32 of the kick plate 30 is fitted into the cutout portion 21 of the tread plate 20 from above, and the second sliding portion 31 of the kick plate 30 is brought into contact with the first sliding portion 22 of the tread plate 20.

  As a result, as shown by the arrow in FIG. 1B, the kick plate 30 is slid downward and forward, and the vertical surface portion 33 of the kick plate 30 is brought into contact with the edge portion 23 of the tread plate 20. In the present embodiment, since there is almost no play between the width of the protruding portion 32 of the kick plate 30 and the width of the rectangular groove 21a of the tread plate 20, the second sliding portion 31 contacts the first sliding portion 22 at the same time. Although the vertical surface portion 33 of the kick plate 30 appears to abut the edge portion 23 of the tread plate 20, the kick plate 30 slides downward and forward slightly.

  At this time, no nail or adhesive is used between the kick board 30 and the tread board 20, and the kick board 30 is not directly fixed to the tread board 20.

According to the staircase joining structure and the staircase construction method configured as described above, the first sliding portion 22 of the tread plate 20 is inclined downward from the rear to the front. As the second sliding portion 31 of the plate 30 slides with the first sliding portion 22 of the tread plate 20, the kick plate 30 moves downward and forward. Then, at the position where the vertical surface portion 33 of the kick plate 30 contacts the edge portion 23 of the tread plate 20, the protruding portion 32 of the kick plate 30 is accommodated in the notch portion 21 of the tread plate 20, so that the kick plate 30 is against the tread plate 20. Since the positioning is performed, it is difficult for a gap to be generated between the tread board 20 and the kick board 30.
In this manner, even an inexperienced operator can easily and accurately arrange the kick plate 30, so that the construction time can be shortened.
Moreover, since the length of the protrusion part 32 of the kick board 30 is set longer than the amount of bending of the tread board 20 that occurs when the user moves up and down the stairs, a gap is hardly generated even after construction.

  In addition, the fact that the first sliding portion 22 of the tread plate 20 is inclined downward from the rear to the front is, in other words, inclined upward from the front to the rear. Therefore, since the upward inclination receives the impact at the time of the collision received by the kick plate 30, the kick plate 30 is resistant to the collision and the kick plate 30 is difficult to move backward. As a result, it is difficult for a gap to be generated between the tread board 20 and the kick board 30. Thus, although it is strong against a collision, since it only needs to cut into the tread board 20 and the kick board 30, construction time does not increase and cost can also be suppressed.

Moreover, since the notch 21 is formed in the upper part of the tread plate 20, it can be constructed from the front side of the stairs and from the lower stage in order, and the operator can use an unstable stepladder or crawl around the floor. There is no need to work, and the worker can get on the tread board 20 that he has constructed and can work safely without any unreasonable posture. The construction from the lower stage is a work from the lower stage completely in the order of the tread board 20, the kick board 30, the tread board 20, and the kick board 30. The conventional one-stage kick board 30, the tread board 20, and the first kick board. Since there is no space for one step of the tread plate 20 like the step plate 20, the step tread 20, the safety is even higher.
In addition, since it is not necessary to move between the front side and the back side of the staircase during construction, which is common practice in conventional staircase construction, work efficiency is very high.

Further, since the second sliding portion 31 of the kick plate 30 contacts the first sliding portion 22 of the tread plate 20 at a point in a cross-sectional view, the frictional force is not so high and slides smoothly and appropriately. Is positioned with respect to the tread plate 20.
Furthermore, since the rear surface of the main body of the kick plate 30 is substantially flush with the rear end surface of the tread plate 20, the effective area of the tread plate 20 in front of the kick plate 30 is increased, and the rear end portion of the tread plate 20 that does not contribute to the effective area is increased. Material waste is minimized. This is because the lower rear end of the kick plate 30 is cut to form the second sliding portion 31, and thus is not formed in this way (when the lower end of the kick plate 30 remains in a rectangular shape that is not cut). This is because the rear surface of the kick plate 30 can be positioned further rearward.
Further, since the front surface of the protruding portion 32 of the kick plate 30 is flush with the front surface of the main body of the kick plate 30 to the lower end of the protruding portion 32, the allowable range with which the edge portion 23 of the step plate 20 abuts is wide. Since the angle of the edge portion 23 is 90 °, a gap between the tread plate 20 and the kick plate 30 is less likely to occur.
Moreover, since the front surface of the notch 21a of the tread plate 20 is vertical, the contact surface between the front surface of the protrusion 32 of the kick plate 30 and the front surface of the notch 21a of the tread plate 20 is wide, and the fixed (joined) state is maintained. Stabilize.

(Second embodiment)
Next, with reference to FIG. 2, a joining structure and a staircase construction method according to the second embodiment of the present invention will be described. In addition, the same code | symbol was attached | subjected to the same part as 1st embodiment.

The difference of this embodiment from the first embodiment is the width and length of the protrusion 32 of the kick plate 30, and the other components are the same as those of the first embodiment.
The width of the projecting portion 32 is narrower than the width of the rectangular groove 21a of the tread plate 20, and the play is larger than that of the first embodiment.

Further, the length of the protruding portion 32 is longer than that of the first embodiment, and when the second sliding portion 31 slides with the first sliding portion 22 and the vertical surface portion 33 contacts the edge portion 23. Further, the length of the protrusion 32 is such that the lower end of the protrusion 32 abuts against the bottom surface of the rectangular groove 21a.
The length of the protrusion 32 is the upper limit of the length of the protrusion 32 in the present invention. Note that the lower limit of the length of the protrusion 32 is equal to the maximum amount of bending of the tread plate 20.

  Even if it is such a structure, there exists the same effect as 1st embodiment, and the same construction method can be performed.

(Third embodiment)
Next, with reference to FIG. 3, the joining structure and the construction method of the staircase which concern on 3rd embodiment of this invention are demonstrated. In addition, the same code | symbol was attached | subjected to the same part as 1st embodiment.
The difference of this embodiment from the first embodiment is the shape of the notch 21 of the tread plate 20, and the other components are the same as those of the first embodiment.

  In the present embodiment, the front end of the cutout portion 21 of the tread plate 20 is inclined downward from the rear to the front, whereby the angle of the edge portion 23 of the tread plate 20 is 90 ° or less.

Even in such a configuration, when the second sliding portion 31 slides with the first sliding portion 22, the vertical surface portion 33 of the kick plate 30 contacts the edge portion 23 of the tread plate 20. It is hard to occur and construction is easy and accurate. Further, even when an impact is applied to the kick plate 30, a gap is hardly generated.
In particular, since the angle of the edge portion 23 of the tread plate 20 is 90 ° or less, the edge portion 23 of the tread plate 20 abuts on the vertical surface portion 33 of the kick plate 30 at a pin point when the kick plate 30 moves most forward. The generation of gaps can be reliably suppressed.
Moreover, the construction method similar to 1st, 2nd embodiment can be performed.

(Fourth embodiment)
Next, with reference to FIG. 4, the joining structure which concerns on 4th embodiment of this invention is demonstrated. In addition, the same code | symbol was attached | subjected to the same part as 1st embodiment.
The difference of this embodiment from the first embodiment is the shape of the second sliding portion 31 of the kick plate 30, and the other components are the same as those of the first embodiment.

In 1st thru | or 3rd embodiment, although the 2nd sliding part 31 was a corner | angular part and contacted the 1st sliding part 22 in the cross sectional view, the 2nd sliding part 31 of this embodiment is from back. It is inclined downward toward the front.
In addition, since the inclination angle of the first sliding portion 22 and the inclination angle of the second sliding portion 31 are equal, the second sliding portion 31 and the first sliding portion 22 are in contact with each other in a cross-sectional view (in reality, Face to face).

  In addition, the contact method of the 1st sliding part 22 and the 2nd sliding part 31 is not restricted to these, As shown in FIG. 5, only the 2nd sliding part 31 of the kick board 30 is inclined. The first sliding part 22 and the second sliding part 31 may be slid. Here, the notch 21 of the tread board 20 is formed in a staircase shape in which a deep rectangle and a shallow rectangle communicate with each other.

  In the fourth embodiment, both the first sliding portion 22 and the second sliding portion 31 are inclined, but unlike the fourth embodiment, the rear end of the tread plate 20 and the kick plate as shown in FIG. Both of the lower ends of 30 may be cut into a triangular shape, and the inclination angles of the two may be made different at that time. In this case, by making the lower end angle of the kick plate 30 larger than the lower end angle of the notch portion 21 of the tread plate 20, the first sliding portion 22 and the second sliding portion 31 are in contact with each other in a sectional view.

  Further, as shown in FIG. 7, the tread plate 20 of FIG. 5 and the kick plate 30 of FIG. 6 may be combined.

  Moreover, as shown in FIG. 8, the notch 21 of the tread board 20 may be substantially V-shaped, and the lower end of the kick board 30 may be substantially V-shaped. Even at this time, the front end and the upper end portion of the cutout portion 21 of the tread plate 20 are cut vertically so that the edge portion 23 is 90 °. Then, the vertical surface portion 33 of the kick plate 30 contacts the edge portion 23 of the tread plate 20. At this time, the lower end top part of the notch part 21 and the lower end top part of the kick board 30 are spaced apart.

  Further, as shown in FIG. 9, the cutout portion 21 of the tread plate 20 may have a triangular shape, the second sliding portion 31 of the kick plate 30 may have a right angle, and the protruding portion 32 may have a triangular shape. Even if it does in this way, the difficulty of the production | generation of a clearance gap and the ease of construction are the same as that of other embodiment.

Moreover, as shown in FIG. 10, you may make it the notch part 21 of the tread board 20 consist only of a rectangular groove.
Further, the rear surface of the main body of the kick plate 30 is substantially flush with the rear end surface of the tread plate 20, and the rear surface of the main body of the kick plate 30 is located behind the rear end surface of the tread plate 20. Moreover, it is not restricted to substantially the same.

  Further, the kick plate 30 may be fixed to the tread plate 20 with an adhesive.

DESCRIPTION OF SYMBOLS 1 Side board 2 Tread board 3 Kick board 4 Mounting groove 5 Groove 6 Wedge 7 Nail 8 Sasara girder 9 Sawtooth processing 10 Sawtooth processing vertical surface 11 Sawtooth processing horizontal surface 12 Gap 13 Notch 14 Groove 20 Tread plate 21 Notch 21a Rectangular groove 21b Triangular groove 22 First sliding part 23 Edge part 30 Kick plate 31 Second sliding part 32 Projection part 33 Vertical surface part

Claims (6)

In the joining structure of the staircase formed by joining the tread board arranged horizontally and the kick board that touches the rear part of the tread board and extends vertically upward,
The tread is
A notch formed by notching the rear upper surface of the tread;
A first sliding portion provided at an upper rear end of the tread by forming the notch,
And an edge portion formed by the upper surface of the tread plate on the front side of the notch portion and an angle portion of 90 ° or less, and
The kick plate is
A second sliding portion provided at a lower rear end of the kick plate and contacting the first sliding portion of the tread plate;
A lower front portion of the kick plate protrudes downward and can be accommodated in a notch portion of the tread plate; and
A vertical surface portion that is at least a part of the front end of the protruding portion that contacts the edge portion of the tread board and is a vertical surface;
At least one of the first sliding portion of the tread plate and the second sliding portion of the kick plate is inclined downward from the rear to the front, and the staircase joining structure is characterized in that: While the first sliding portion of the tread plate is inclined downward from the rear to the front,
2. The staircase joining structure according to claim 1, wherein the second sliding portion of the kick plate is in contact with the first sliding portion of the tread plate at a point in a cross-sectional view.   The staircase joining structure according to claim 1 or 2, wherein a rear surface of the main body of the kick plate is substantially flush with a rear end surface of the tread plate. The angle of the edge portion of the tread is 90 °,
The staircase junction structure according to any one of claims 1 to 3, wherein a front surface of the projecting portion of the kick plate is flush with a front surface of the main body of the kick plate up to a lower end of the projecting portion. . The rear upper surface is formed by a notch portion, the first sliding portion provided at the upper rear end by forming the notch portion, and the upper surface on the front side of the notch portion and the notch portion. A tread having an edge portion having an angle of 90 ° or less;
A second sliding portion that is provided at the lower rear end and comes into contact with the first sliding portion of the tread; a lower front portion that projects downward; and a projection that can be accommodated in the notch of the tread; and an edge portion of the tread A kick plate having at least a part of the front end of the projecting portion that contacts and a vertical surface portion that is a vertical surface, and a first sliding portion of the tread plate and a second sliding portion of the kick plate At least one of them is a construction method of stairs inclined downward from the rear to the front,
The protruding portion of the kick plate is fitted from above into the notch portion of the tread plate disposed horizontally, and the second sliding portion of the kick plate is brought into contact with the first sliding portion of the tread plate, thereby A construction method for a staircase, wherein the kick plate is slid downward and forward, and the vertical surface portion of the kick plate is brought into contact with the edge portion of the tread plate.   The staircase construction method according to claim 5, wherein the kick plate is not directly fixed to the tread.