JP2012188845A - Stair riser and fixing structure of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and highly accurately drive a fixture when an upper end part of a stair riser is fixed using the fixture while the upper part is fitted in a riser fitting groove on a rear face of a tread.SOLUTION: An upper end part of a riser 2 is fitted in a riser fitting groove 5 formed on a rear face 32 of a stair tread 3. A rear face side recessed groove 8 extending in the longitudinal direction is formed on a rear face 23 of the riser 2. The upper end part of the riser is firmly fixed in the riser fitting groove by an adhesive applied to an upper butt end of the riser and a fixture 9 driven from the rear face side recessed groove.

Description

  The present invention relates to a stair kick plate and a fixing structure thereof.

In general, the construction of a staircase including a side plate, a tread plate, and a kick plate is performed in the following order.
1 Fix the side plate to the wall.
2 The step board of the staircase is fitted into the tread board fitting groove formed in the side plate, and a wedge is driven in and fixed to the side plate.
3 Apply adhesive to the top end of the kick plate.
4 The left and right end portions of the kick plate are fitted into the kick plate fitting groove of the side plate, and the upper end of the kick plate is fitted into the kick plate fitting groove on the back surface of the tread plate.
5 Fix the kick board to the side board and the tread board with a fixing tool such as a wood screw.

  However, the following problems have been pointed out in the fixing structure of the kick board and the tread board by such construction.

  That is, when the fixing tool E such as a wood screw is driven obliquely from the back surface side of the kick plate A toward the tread plate B in the fixing process of 5 above, the tip of the fixture E is on the back surface side of the kick plate A. The fixture E may not enter the kick plate A at a predetermined position and angle. In this case, the fixing device E is driven between the kick plate fitting groove C of the tread plate B and the back surface of the kick plate A, and the original driving position and angle of the fixing device E are shifted upward accordingly. In some cases, the fixture E penetrates the tread B and the tip protrudes to the front side of the tread B (see FIG. 6), or the surface of the tread B is swollen. Furthermore, the fixture E may destroy the entrance of the kick plate fitting groove C and the upper end portion of the kick plate A, and the fixation between the kick plate A and the tread plate B may not be firmly performed.

  In addition, as a measure for improving this problem, in Patent Document 1, a recessed portion is formed so as to continue to the rear of the kick plate fitting groove on the back surface of the tread plate, and an inclined surface is formed from the recessed portion to the back surface of the tread plate. Thus, the fitting state of the kick plate can be confirmed through the inclined surface, and the head of the nail can be placed in the recessed portion when nailing, so that the tread plate can be easily nailed without getting in the way. It is supposed that work can be done.

CD-ROM of actual application No. 4-60084 (Japanese Utility Model Application No. 6-20703)

  However, according to the prior art described in Patent Document 1, since the recessed portion is formed continuously behind the kick plate fitting groove on the back surface of the tread plate, the upper end portion on the back surface side of the kick plate cannot be supported, and the fixed strength And the stability is insufficient. Moreover, since this recessed part is formed in sufficient magnitude | size so that the fixing location of a fixing tool can be visually observed, the intensity | strength of a tread is reduced. Further, the driving angle when the fixing tool is driven from the upper end on the back surface side of the kick plate in the fixing step 5 is not fixed, and as described above with reference to FIG. In some cases, problems such as projecting to the surface of the tread board or swelling of the tread surface may occur. In particular, in this conventional technique, nailing is performed from the inside of the recess, so that the depth of nailing becomes shallow, and there is a high possibility that such a problem occurs when the driving angle is shifted even a little.

  Therefore, the place which this invention makes a subject solves such a disadvantage of a prior art, and fixes it with a fixing tool in the state where the kick board of the staircase was fitted in the kick board fitting groove on the back of the tread board. It is easy to drive the fixing tool, and the fixing tool can be prevented from penetrating the tread board and projecting its tip to the surface side of the tread board or causing the tread surface to bulge. It is to provide a novel staircase kick plate and its fixing structure that can prevent the upper end of the entrance and the kick plate from being destroyed and can firmly fix the kick plate and the tread board. .

  In order to solve this problem, the present invention according to claim 1 is a kick plate whose upper end is fitted into a kick plate fitting groove formed on the back surface of a step board of a staircase, the kick plate fitting A back-side concave groove extending in the longitudinal direction is formed on one side surface that becomes the back side when fitted into the groove.

  The present invention according to claim 2 is a fixing structure of a kick plate that fits and fixes the upper end portion of the kick plate in a kick plate fitting groove formed on the rear surface of the step board of the staircase, and the rear surface side of the kick plate A back groove on the back side extending in the longitudinal direction is formed, and the kick plate is fixed to the tread by a fixing tool driven from the back groove.

  According to the first aspect of the present invention, when the upper end portion of the kick plate is fitted to the kick plate fitting groove on the back surface of the tread plate, the fixture is fixed inside the concave groove on the back side. Since the tool can be driven in a stable state with the tip of the tool applied, workability is improved. At this time, since the driving position and the angle are prevented from being greatly shifted, the fixing tool penetrates the tread board as in the case of the prior art and the tip projects to the tread surface side, or the tread surface is swollen. This will not cause any problems.

  Furthermore, since the fixing tool is driven from the back-side concave groove, the fixing tool does not slide on the back surface of the kick plate during driving and does not enter the kick plate fitting groove on the back surface of the tread plate. Therefore, the fixing work can be performed without damaging the entrance of the kick plate fitting groove and the tip of the kick plate.

  According to the second aspect of the present invention, since the fixture is driven from the back side groove and the kick plate is fixed to the tread, it is possible to prevent positional deviation, angular deviation, or slippage of the fixture during driving. A strong fixing structure can be obtained while improving workability, and the entrance of the kick plate fitting groove and the tip of the kick plate are not damaged.

It is a perspective view which shows an example of the staircase structure to which this invention is applied. It is upper part sectional drawing which shows two embodiment of this invention about the kick board used for this staircase. It is sectional drawing which shows the fixed structure which fitted and fixed the upper end part of the kick board of FIG. 2 to the kick board fitting groove of a tread board back surface. It is a top sectional view of a kick board by other embodiments of the present invention. It is explanatory drawing which shows the kick board fixation operation | work at the time of constructing the stairs of FIG. 1 using the kick board of FIG. 4 to process order (a)-(b). It is sectional drawing which shows the state which penetrated the surface of the tread board because the driving angle of the fixing tool at the time of fixing a kick board to a tread board shifted | deviated in the fixing structure of the kick board of a staircase by a prior art.

  FIG. 1 is a perspective view showing an example of a staircase structure to which the present invention is applied, in which kick plates 2 and treads 3 are alternately stretched between a pair of side plates 1 and 1. The staircase structure has various shapes such as a straight shape, an L shape, and a spiral shape, but the present invention can be applied to any of them.

  FIG. 2A shows the shape of the upper end portion of the kick plate 2 according to one embodiment of the present invention. FIG. 3 shows the kick plate fitting groove 5 in which the upper end portion of the kick plate 2 is formed on the back surface of the tread plate 3. FIG. 2 shows a fixing structure obtained by fitting to and fixing with the adhesive 6 and the fixture 9. In the kick plate 2, a back-side concave groove 8 extending in the longitudinal direction (width direction in the construction state) is formed on the back surface 23 side near the upper end. The back-side recessed groove 8 has an upper end substantially flush with or slightly lower than the tread plate back surface 32 in a state where the upper end portion of the kick plate 2 is fitted and fixed to the kick plate fitting groove 5 of the back surface 32 of the tread plate 3. It is formed in the position. By forming the back-side concave groove 8 at such a position, it is possible to prevent the tip of the fixture 9 from entering the kick plate fitting groove 5 when the fixture 9 (FIG. 3) is driven. Will be driven at the correct angle, so that the fixing tool 9 penetrates the tread board 3 and the tip projects to the surface side of the tread board 3 or causes the surface of the tread board 3 to bulge as in the case of the prior art. Can be prevented, and damage to the entrance of the kick plate fitting groove 5 can be prevented.

  Further, when the upper end portion of the kick plate 2 is fitted to the innermost portion of the kick plate fitting groove 5 and the front surface side is pressed against the front inner wall surface 52 of the kick plate fitting groove 5, the back side concave groove 8 is formed. The upper end portion of the kick plate 2 in the kick plate fitting groove 5 is substantially continuous with the space between the rear inner wall surface 53 of the kick plate fitting groove 5 and the back surface side of the upper end portion of the kick plate 2A. The fitting state and the driving state of the fixture 9 can be easily visually confirmed from these continuous spaces. Therefore, it can fix in the state which does not have a clearance gap between the upper end part of the kick board 2, and the kick board fitting groove 5, and the firm and stable fixing structure which does not produce a stepping sound at the time of a walk is obtained.

  Further, when the adhesive 6 overflows from the kick plate fitting groove 5 and flows down along the back surface 23 side of the kick plate 2, the adhesive enters the back surface side concave groove 8 and prevents further flow down. When this hardens in the back surface side concave groove 8, it plays a role of firmly holding and fixing the head of the fixture 9, so that a stronger fixing structure can be obtained.

  The cross-sectional shape of the back-side concave groove 8 is not particularly limited as long as it enables the fixing tool 9 to be driven at a predetermined position and angle, but preferably has a rectangular shape as shown in FIG. The cross-sectional shape is a right-angled triangular cross-sectional shape having an upper side that is substantially perpendicular to the back surface 23 of the kick plate 2 (substantially parallel to the upper end lip 21) and an oblique side that extends from the back end of the upper side to the back surface 23 (see FIG. 2 (b)). In the latter case, it is preferable to form the oblique side so that the inclination angle is substantially the same as a predetermined driving angle of the fixture 9. Further, the size is not particularly limited as long as the above-described effects can be exhibited, but generally, the groove width is preferably about 3 to 10 mm, and the depth is If it is too much, the strength of the kick plate 2 is lowered, so that it is generally 2 mm or less, preferably about 0.5 to 1 mm as the depth to which the tip of the fixture 9 is hooked and held firmly. As an example, in this embodiment, the back side concave groove 8 having a square shape with an opening width of 3 mm and a depth of 1 mm is 12 mm from the upper end of the kick plate 2 having a thickness of 9 mm (same as the depth of the kick plate fitting groove 5). It is formed in the position to leave.

In addition, when MDF is used as the kick board 2, it is good to scrape the hard layer by the side of the kick board back surface 23, and to form the back surface side ditch | groove 8. FIG. MDF is a plate-like body in which wood fibers are densely solidified with an adhesive, and a high-density hard layer is formed on the front and back surfaces. That is, the average density of the MDF is about 0.7~0.9g / cm ^3, hard layer having a density of about 0.9~1.1g / cm ³ on the front and back surface is formed, the intermediate layer 0 It is formed as a soft layer of about 55 to 0.65 g / cm ³ . The high-density hard layer is difficult to position because the tip of the fixture 9 is difficult to enter, and since it becomes slippery on the surface, the MDF hard layer is shaved so that a relatively soft layer is exposed on the groove bottom surface. It is preferable to form the concave groove 8 on the back surface. In this way, the fixture 9 can be easily driven and can be driven at a predetermined position without causing slip. Moreover, since the head of the fixture 9 is caught by the hard layer portion, it is firmly held, and the entrance corner of the back-side concave groove 8 is not damaged. In general, if the back-side groove 8 is formed by cutting out from the front surface (the back surface 23 of the kick plate) to a depth of about 1 to 2 mm, it penetrates the hard layer and is relatively soft on the groove bottom surface of the back-side groove 8. Layer (layer having a density of about 0.7 to 0.9 g / cm ³ ) appears, and the above-described effects can be exhibited.

  FIG. 4 shows the shape of the upper end portion of the kick plate 2A according to another embodiment of the present invention. Like the kick plate 2 of the first embodiment, the back side concave portion extending in the longitudinal direction on the back surface 23 side near the upper end. A groove 8 is formed, and further, a throat side concave groove 4 extending in the longitudinal direction is formed at the upper end lip thereof. The configuration, shape, dimensions, and the like of the back-side concave groove 8 are the same as those of the first embodiment, and the effect of being able to perform the driving of the fixture 9 with high workability and high accuracy and overflow from the kick plate fitting groove 5. The operation and effect of housing the adhesive 6 and holding the head of the fixture 9 are the same as those in the first embodiment, and thus the description thereof is omitted here.

  The cross-sectional shape of the mouth end side groove 4 is arbitrary, and may be a U-shaped or V-shaped cross-sectional shape in addition to the illustrated rectangular shape. Moreover, it is preferable that the width | variety center groove | channel 4 is formed so that the center of the width | variety may correspond with the thickness direction center in the upper end lip of the kick board 2A.

  It is preferable that the width of the kerf-side concave groove 4 is formed to be about 1/3 to 2/3 of the thickness of the kick plate 2. If the width of the kerf-side ditch 4 exceeds 2/3 of the thickness of the kick plate 2, the upper end protrusions 21, 21 left on both sides of the kerf-side ditch 4 are relatively thin. Accordingly, the adhesion area of the kick plate fitting groove 5 (described later) formed on the back surface of the tread board 3 with respect to the groove bottom surface 51 is reduced, and the adhesive strength is lowered. Further, when the upper end portion of the kick plate 2A is pushed toward the groove bottom surface 51 of the kick plate fitting groove 5, the thin upper end protruding portions 21 and 21 may be damaged by the impact. On the other hand, when the width of the grooved groove 4 is less than 1/3 of the thickness of the kick plate 2, the upper end of the kick plate 2A with the adhesive applied to the upper end is fitted into the kick plate. When it is inserted into the groove 5, it becomes difficult for the adhesive to enter the mouth end side concave groove 4, and many of them overflow from the kick plate fitting groove 5 and may flow down along the front and back surfaces of the kick plate 2A. In addition, since the adhesive does not sufficiently enter the mouth end side groove 4, a space is generated inside, and a strong fixing structure cannot be obtained.

  The depth of the wooden mouth side concave groove 4 is 3 mm or less, and particularly preferably 0.5 to 2 mm. If the kerf-side ditch 4 is too deep, most of the adhesive applied to the upper end kerf of the kick plate 2A has entered the kerf-side ditch 4 and the kick plate 2A has been fitted into the kick plate fitting groove 5. Sometimes the adhesive does not reach the front and rear inner walls of the kick plate fitting groove 4, so that the kick plate 2A and the tread plate 3 are not sufficiently fixed, and the non-adhesive surfaces rub against each other when walking. There is a fear. On the other hand, if the mouth end side groove 4 is too shallow, when the adhesive is applied to the upper end end of the kick plate 2A, the adhesive does not easily come into contact with the two points at the entrance of the end groove 4 and the adhesive is applied. It becomes easy to separate from the surface and it becomes difficult to apply a certain amount evenly. Further, when the upper end portion of the kick plate 2A is fitted into the kick plate fitting groove 5, the adhesive may not be stored in the cut end side groove 4 and may overflow from the cut end side groove 4.

  The size (width, depth) of the kerf-side concave groove 4 is determined in consideration of the above. As an example, in the case of the kick plate 2 having a thickness of 9 mm, the mouth end side concave groove 4 having an opening width of 3 mm and a depth of 1 mm is formed.

  With reference to FIG. 5, a description will be given of a kick plate fixing operation when constructing a staircase using the kick plate 2A of FIG.

  First, as shown in FIG. 5A, the adhesive 6 is applied while being pushed out from the adhesive tube 7 along the kerf-side concave groove 4 formed in the upper end lip of the kick plate 2A. The adhesive 6 is not particularly limited, but generally, a urethane adhesive, a vinyl acetate adhesive, or the like is used.

  The adhesive 6 is applied along the cutout side groove 4, and at this time, the adhesive non-applied portions are about 1 to 2 mm near the front and back of the upper end protrusions 21 and 21 on both sides of the cutout side groove 4. It is good to apply so that it remains. By doing in this way, even if a kick board is inclined a little at the time of construction, while preventing the adhesive 6 from dripping on the front and back of the kick board 2A, it serves as a standard of the appropriate application amount of the adhesive 6. be able to. In order to realize this, for example, when the groove-side concave groove 4 having a rectangular cross section is formed with a width of about 1/3 of the thickness of the kick plate 2A, the adhesive 6 is centered on the thickness of the kick plate 2A. It is good to use what cut | disconnected the front-end | tip of the adhesive tube 7 so that it may apply | coat with the width | variety of about 2/3 of this thickness centering on width. As a more specific example, as described above, when the top end of the kick plate 2A having a thickness of 9 mm has the opening width of 3 mm and the groove-side concave groove 4 having a rectangular cross section, the adhesive to be applied is applied. What cut | disconnected the front-end | tip of the adhesive tube 7 so that 6 may become a diameter of about 6 mm is good.

  The amount of the adhesive 6 applied is preferably 10 to 35 g / m with respect to the kick plate 2A having a width of 750 to 1000 mm and a thickness of 5 to 15 mm, although it depends on the size of the cut end side groove 4. In this example, in the case of the kick plate 2A having a length (width) of 900 mm and a thickness of 9 mm, an adhesive application amount of 21.7 g / m was adopted at the upper end lip. Thus, by adjusting the application surface and the application amount of the adhesive 6 with respect to the top end of the kick plate 2A, an appropriate adhesive application state can be obtained, and the adhesive 6 is applied in an excessive amount. It is possible to prevent inconveniences such as overflowing from the kick plate fitting groove 5 and an excessive amount of the adhesive 6 being applied, resulting in a decrease in fixing strength and a squealing.

  Next, as shown in FIG. 5 (b), the upper end portion of the kick plate 2 </ b> A with the adhesive 6 applied to the upper end lip is fitted into the kick plate fitting groove 5 formed on the back surface of the tread plate 3. Go. As shown in the drawing, the kick plate fitting groove 5 is formed to have a groove width dimension slightly larger than the thickness of the kick plate 2A.

  As shown in FIG. 5C, when the upper end lip of the kick plate 2A comes into contact with the groove bottom surface 51 of the kick plate fitting groove 5, the adhesive 6 applied to the upper end lip of the kick plate 2A. Is crushed and enters the groove 4 on the side of the groove 4 without gap, and expands in the back of the groove 5 in the kick plate fitting groove 5, including the upper end protrusions 21, 21 of the kick plate 2 A and the bottom surface 51 of the groove. Between the front inner wall surface 52 and the rear inner wall surface 53 of the kick plate fitting groove 5 in the inside of the kick plate fitting groove 5. Get in.

  In this state, as shown in FIG. 5 (d), the kick plate 2 </ b> A is pressed against the front inner wall surface 52 of the kick plate fitting groove 5. As a result, the upper end portion on the surface 22 side of the kick plate 2A is bonded and fixed to the front inner wall surface 52 of the kick plate fitting groove 5 by the adhesive 6 interposed therebetween, and the upper end lip of the kick plate 2A and the kick plate 2A. The adhesive is interposed between the groove bottom surface 51 of the plate fitting groove 5 and between the upper end on the back surface 23 side of the kick plate 2A and the rear inner wall surface 53 of the kick plate fitting groove 5 by the adhesive 6 interposed therebetween. Therefore, the upper end portion of the kick plate 2A is bonded and fixed to the kick plate fitting groove 5 on three surfaces, and an extremely strong fixing structure is obtained. Further, the adhesive 6 is interposed between the kick plate 2A and the kick plate fitting groove 5, and they do not rub against each other. Even if the excessive amount of the adhesive 6 overflows from the kick plate fitting groove 5, it will flow down from the rear side where the relatively large gap is formed to the back side of the kick plate 2A. Even if the adhesive is solidified in this portion, it is hidden from the surface side and cannot be seen, so the aesthetic appearance is not impaired.

  In the above-mentioned and the kick plate fixing operation shown in FIG. 5, the kick plate 2 </ b> A (FIG. 4) formed with the back-side groove 8 and the mouth-side groove 4 is used. The kick plate fixing operation in the case of using the kick plate 2 (FIG. 2) in which only the back-side concave groove 8 is formed without being formed is performed in substantially the same manner. In this case, the adhesive 6 cannot be applied along the cutout groove 4 and does not enter the cutout groove 4, but the upper end portion of the kick plate 2 is fitted to the kick plate with three surfaces. It is the same in that it is adhered and fixed to the groove 5, and an extremely strong fixing structure can be obtained, and the occurrence of trumbling during walking can be prevented.

DESCRIPTION OF SYMBOLS 1 Side board 2, 2A Kicking board 21 Upper end lip 22 Front surface 23 Back surface 3 Tread board 31 Front surface 32 Back surface 4 Deck side groove 5 Kick board fitting groove 51 Groove bottom surface 52 Front inner wall surface 53 Rear inner wall surface 6 Adhesive 7 Adhesive tube 8 Back side groove 9 Fixing tool

Claims (2)

A kick plate whose upper end is fitted to a kick plate fitting groove formed on the back surface of the step board of the staircase, and is longitudinally formed on one side surface which becomes the back side when fitted to the kick plate fitting groove The back surface side ditch | groove extended in this is formed. A structure for fixing a kick plate that fits and fixes the upper end portion of the kick plate in a groove for fitting the kick plate formed on the back surface of the step board of the staircase, and has a concave on the back side that extends in the longitudinal direction on the back side of the kick plate A structure for fixing a kick plate, wherein a groove is formed, and the kick plate is fixed to the tread by a fixing tool driven from the concave groove on the back surface side.

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