JP2008106555A - Stairs with illumination - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To connect wiring connected to a lighting means, to a controller or the like of an upper floor or a lower floor and to present simple appearance of a side face of a girder with easy construction work in open stairs fitting the girder into a cutout part of each tread and fitting the edge part of the cutout part into a fitting groove of the girder for connection. <P>SOLUTION: The lighting means is provided at the lower face of a front part of the tread 2. A storage groove 9 extending backward from the front part of the tread 2 near the lighting means is formed at the lower face of the tread 2. A storage recess 11 communicating with the rear end of the storage groove 9 is formed at the tread 2. The girder 1 is fitted into the cutout part 7 formed in the tread 2 and opened backward. The edge part of the cutout part 7 is fitted into the fitting groove 4 formed in the girder 1 and opened forward. In this state, the storage recess 11 is allowed to communicate with the girder side wiring groove part 6 formed in the side face of the girder 1 and extending in the longitudinal direction of the girder 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an illuminated staircase in which illumination means is provided on the lower surface of the front portion of a tread.

  Conventionally, for example, as shown in FIG. 16, an illuminated staircase in which illumination means 35 is provided on the lower surface of the front portion of each tread board 2 is used. This lighting means 35 illuminates the lower tread 2 with the illumination means 35. The safety at the time of ascending and descending can be improved (for example, Patent Document 1).

  By the way, the illumination means 35 provided on the step board 2 of each step needs to be connected to a controller or a switch provided on the lower floor or the upper floor by a wiring 36. A wiring duct 34 extending from the side plate 33 to the side plate 33 that is in contact with the tread plate 2 is provided, and the wiring duct 34 is connected to a controller or the like on the lower floor or the upper floor through the wiring 36 of the illumination means 35.

  Here, the wiring duct 34 is formed as follows. A tread side duct 34 a extending in the left-right direction is provided on the lower surface of the front part of the tread board 2 in the vicinity of the illumination means 35, and the tread side duct 34 a reaches the side end of the tread board 2. A side plate side duct 34 b is provided on the side surface of the side plate 33 along the longitudinal direction of the side plate 33. An arbitrary portion in the longitudinal direction of the side plate side duct 34b is connected to an end portion of the tread plate side duct 34a through a communication duct 34c provided on the side surface of the side plate 33, thereby forming a wiring duct 34. .

However, since the illuminated staircase shown in FIG. 16 is provided with the side plate side duct 34 b and the communication duct 34 c protruding from the side plate 33, these ducts 34 b and 34 c impair the appearance of the side plate 33. Further, it is necessary to provide the communication duct 34c along the lower surface of the tread plate 2, and to connect it to the side plate side duct 34b, so that the construction is troublesome. Moreover, in this illuminated staircase, it is necessary to provide the communication duct 34c along the lower surface of the tread board 2 and connect it to the side plate side duct 34b.
JP 2000-303644 A

  The present invention was invented in view of the above-described conventional problems, and in an open staircase in which a girder is fitted into a notch portion of a tread board and an edge portion of the notch portion is fitted into a fitting groove of the girder and connected. With lighting that can connect the wiring connected to the lighting means to the upper floor and lower floor controllers via wiring passages, etc., and the construction work is easy and the side of the girder can be made simple The task is to provide stairs.

  In order to solve the above-mentioned problem, the illuminated staircase according to the present invention is provided with illumination means on the lower surface of the front portion of the tread board 2, and on the lower surface of the tread board 2, the tread plate side extends backward from the front portion of the tread board 2 near the illumination means. A wiring groove portion 17 is formed, a groove communication recess 18 is formed in the tread plate 2 so as to communicate with a rear end portion of the tread plate side wiring groove portion 17, and a girder 1 is formed in a notch portion 7 formed in the tread plate 2 and opening rearward. The longitudinal direction of the girder 1 in which the groove communication recess 18 is formed on the side surface of the girder 1 in a state where the groove is fitted into the fitting groove 4 that opens in the front formed in the girder 1 at the edge of the notch 7. It is characterized by being connected to a girder-side wiring groove 6 extending in the direction.

  With the above configuration, the wiring 13 connected to the illumination means in the open staircase in which the girder 1 is fitted into the notch 7 of the tread 2 and the edge of the notch 7 is fitted in the fitting groove 4 of the girder 1 and connected. Can be led to the girder-side wiring groove 6 through the tread-side wiring groove 17 and the groove communication recess 18 of the tread 2 in order, and can be connected to the controller 26 or the like on the upper floor or the lower floor. In addition, in this case, a linear girder-side wiring groove portion 6 that extends in the longitudinal direction of the girder 1 may be formed on the side surface of the girder 1 as a groove for the wiring 13.

  A second aspect of the present invention is the first aspect of the present invention, wherein the girder-side wiring groove portion 6 is formed so as to cross the fitting groove 4 and the fitting groove 4 is formed to a position extending rearward from the girder-side wiring groove portion 6. The wiring cover 24 covers a portion excluding a portion overlapping the fitting groove 4 of the wiring groove portion 6.

  By forming the girder-side wiring groove 6 so as to cross the fitting groove 4 in this way, a dimensional error occurs in the tread plate 2 fitted into the fitting groove 4, and the rear end surface of the tread plate 2 and the rear end surface of the fitting groove 4 Even if a gap is generated between them, the tread plate 2 can be arranged so as to cross the girder-side wiring groove 6.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the storage recess 11 is formed at the rear end of the tread plate 2, and the cover base 15b having a U-shaped cross section is stored in the storage recess 11. 11 and a cover base 15 b constitute a groove communication recess 18, and the wiring 13 passed through the groove communication recess 18 is covered with a wiring cover 19 b attached to the cover base 15.

  The external appearance can be improved by covering the wiring 13 in the groove communication recess 18 with the wiring cover 24 which is substantially flush with the surface of the tread plate 2.

  In the invention according to claim 1, in the open staircase in which the girder is fitted into the notch portion of the tread plate and the edge portion of the notch portion is fitted into the fitting groove of the girder and connected, the wiring connected to the illumination means is connected to the tread plate. It can be led to the girder-side wiring groove portion through the tread plate-side wiring groove portion and the groove communication recess in order. In addition, in this case, it is only necessary to form a linear girder-side wiring groove extending in the longitudinal direction of the girder on the side surface of the girder, and the side of the girder can have a simple appearance. The tread board side wiring groove part and the girder side wiring groove part can be communicated with each other only by attaching to the girder, and the construction work becomes easy.

  In addition, in addition to the effect of the invention of claim 1, claim 2 provides a case where a dimensional error occurs in the tread fitted into the fitting groove and a gap is formed between the rear end face of the tread board and the rear end face of the fitting groove. The tread board can be arranged so as to cross the girder-side wiring groove portion. In this case, the end surface of the wiring cover arranged above and below the fitting groove is cut straight to form the end surface. Can be abutted against the rear end surface and lower surface of the tread plate without any gap, and the end opening on the fitting groove side of the wiring passage formed between the girder side wiring groove portion and the wiring cover is hidden by the tread plate. be able to.

  Further, in addition to the effect of the invention of claim 1 or 2, claim 3 can prevent the passage for the wiring composed of the groove communication recess and the wiring cover from protruding greatly from the tread, and the appearance of the tread It can be improved.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings. In the following description, the front side is defined as the front side and the back side as the rear side as viewed from the person climbing the stairs.

  In the illuminated staircase of the present example, a plurality of treads 2 are protruded outward from the girder 1 on the girder 1 installed in the building, as shown in FIGS. 10 and 11. It is an open staircase in which the lighting means composed of the lighting unit 3 is provided at the front center of the lower surface of each tread plate 2 without the kick plate and both sides of the girder 1 are exposed.

  As shown in FIG. 2, the girders 1 are formed in a long plate shape along the stairs inclination direction, and are installed in a building side by side so that the side surfaces face each other. The lower end of each girder 1 is connected to the floor 5 on the lower floor, for example, and the upper end is connected to the beam or pillar on the upper floor, for example. Insertion grooves 4 that open to the front are formed at a plurality of locations in the longitudinal direction of each girder 1. Each insertion groove 4 extends horizontally rearward from the upper surface of the girder 1 inclined rearward (front surface of the girder 1), and the groove width is the thickness of the tread plate 2 so that the step board 2 of each step can be fitted. The dimensions are approximately the same. Each fitting groove 4 is composed of a front kerf portion 4a having no bottom and a bottomed groove portion 4b formed by extending both side portions of the kerf portion 4a rearward, and is formed on both side surfaces of the beam 1. The bottomed groove 4b is formed in a rectangular shape in a side view.

  A passage on the side of the spar 1 for storing the wiring 13 connected to the lighting unit 3 of the stool 2 is provided on the side surface of the center side in the left-right direction of the tread plate 2 (opposite girder 1 side) of both sides of each girder 1 As shown, a girder-side wiring groove 6 having a U-shaped cross section extending in the longitudinal direction of the girder 1 is formed. The girder-side wiring groove 6 is formed in a straight line over the entire length in the longitudinal direction of the girder 1, traverses the rear part of each fitting groove 4, and a part in the longitudinal direction overlaps with each fitting groove 4 in a side view. is doing.

  FIG. 3 shows an overlapping portion between the girder-side wiring groove 6 and the fitting groove 4, and as shown in the figure, the girder-side wiring groove 6 is grooved more than the bottomed groove 4b of the fitting groove 4 formed on the same surface. The depth is deeper. Each fitting groove 4 is formed to a position extending beyond the girder-side wiring groove 6 and behind the girder-side wiring groove 6. That is, the girder-side wiring groove portion 6 in FIG. 3 passes through the range of the rear end surface of each fitting groove 4 (that is, the side on the rear side of the bottomed groove portion 4b having a rectangular shape in side view). The lower corner of the rear portion of the fitting groove 4 is located below and behind the girder-side wiring groove 6.

  As shown in FIG. 4, the tread plate 2 attached to the girder 1 has a substantially rectangular plate shape in plan view that is long in the left-right direction. In the figure, reference numeral 7 denotes a notch 7 that opens rearward for fitting the girder 1 provided on the side of the tread 2, and the tread 2 in this example is connected to each of the girder 1 arranged on both sides. For this reason, the notches 7 are formed on both side portions of the tread plate 2. A housing recess 8 is formed in the center of the front part of the lower surface of the tread plate 2. The housing recess 8 houses an illumination unit 3 having an LED as a light emitter as shown in FIG. It is.

  As shown in FIG. 4, a linear storage groove 9 is formed on the lower surface of the tread plate 2 so as to extend rearward from the center portion of the front portion of the tread plate 2 in the vicinity of the lighting unit 3. The storage groove 9 has a U-shaped cross section, the front end portion communicates with the storage recess 8, and the rear end portion reaches the rear end portion of the tread plate 2.

  A storage recess 11 extending in the left-right direction is formed at the rear end portion of the tread plate 2, with a middle portion in the longitudinal direction communicating with the rear end portion of the storage groove 9. The storage recess 11 is formed by a step portion formed by raising the portion between the notches 7 at the rear end portion of the lower surface of the tread plate 2, and the portion extending over the entire length in the longitudinal direction opens downward and rearward. Moreover, both ends in the longitudinal direction are opened from the side surface of the rear end portion of each cut portion 7.

  In each of the storage groove 9 and the storage recess 11, long cover bases 15 a and 15 b having a U-shaped cross-section opening downward are stored and attached by a plurality of screws 10 as shown in FIG. 6. Each of the cover bases 15a and 15b is formed by cutting a cover base material 16 made of a synthetic resin and having a long U-shaped section as shown in FIG. 5A into a predetermined dimension. 9 is provided over the entire length of the storage groove 9, but the cover base 15b stored in the storage recess 11 has both longitudinal ends of the storage recess 11 as shown in FIG. It is not provided in, and it is provided in the part covering the full length except the both ends of a longitudinal direction. Thus, on the lower surface of the tread plate 2, there are a tread plate side wiring groove portion 17 including the storage groove 9 and the cover base 15a stored in the storage groove 9, and a groove communication recess portion 18 including the storage recess 11 and the cover base 15b stored therein. Will be formed. That is, the groove communication recess 18 of this example extends from the rear end of the tread board side wiring groove 17 toward the outer sides on both sides, and the tread board side wiring groove 17 and the groove communication recess 18 are viewed in plan view. A passage for the wiring 13 on the T-shaped tread board 2 side is formed.

  Note that a portion of the cover base 15b and an end portion of the cover base 15a of the wiring cover 19b (to be described later) that covers the cover base 15b (not shown by hatching in FIG. 8) is cut out, and the space in the cover base 15a and the cover are covered through the cutout. The space in the base 15b communicates.

  As shown in FIG. 13, two wiring cords 13 a and 13 b are connected to the lighting unit 3 as the wiring 13. A female connector 20a is provided at the end of one of the two wiring cords 13a and 13b, and a male connector 20b is provided at the end of the other wiring cord 13b. The connector 20a of the wiring cord 13a can be connected to the connector 20b of the wiring cord 13b connected to the lighting unit 3 of the upper step board 2, that is, the lighting unit 3 of this example is provided with the lighting unit 3 of each step board 2. The wires 13 are connected in a daisy chain.

  As shown in FIG. 6, the wiring cords 13 a and 13 b connected to the lighting unit 3 of each of the treads 2 are the cover base 15 b that constitutes the inside of the cover base 15 a that constitutes the tread board-side wiring groove 17 and the groove communication recess 18. After being sequentially passed through the inside, the end of one of the cut-out portions 7 in the longitudinal direction of the groove communication recess 18, i.e., the cover base 15 b of the storage recess 11 is located further on the cut-out portion 7 side. It reaches the part and is pulled out toward the rear of the tread 2 from the same part.

  As shown in FIG. 7, the two wiring cords 13a and 13b housed in the tread board side wiring groove portion 17 and the groove communication recess 18 are covered with wiring covers 19a and 19b. The wiring covers 19a and 19b are attached to the cover base 15a constituting the tread board side wiring groove portion 17 and the cover base 15b constituting the groove communication recess 18, respectively. Each of the wiring covers 19a and 19b is formed by cutting a long cover material 21 made of a synthetic resin shown in FIG. 5B to the same length as the corresponding cover bases 15a and 15b. The cover material 21 includes a cover portion 22 that closes the lower openings of the cover bases 15a and 15b, and fitting pieces 23 that protrude from both sides of the cover portion 22, and each wiring cover formed by cutting the cover material 21. 19a and 19b are attached to each cover base 15 by fitting the fitting pieces 23 on both sides inside the cover bases 15a and 15b so that the outer surface of the cover portion 22 is substantially flush with the lower surface of the tread plate 2. The rear surface of the cover base 15b is also substantially flush with the rear end surface of the tread plate 2.

  In order to attach each of the treads 2 to the girder 1, the lighting unit 3 is attached to the tread 2 before being attached to the girder 1, and the wiring cords 13a and 13b are connected to the treading side wiring groove 17 and the groove communication recess 18 as described above. It is housed in and covered with the wiring covers 19a and 19b, and the notches 7 of the tread plate 2 are inserted into the fitting grooves 4 of the corresponding girders 1 as shown in FIG. As a result, the rear portion of the fitting groove 4 (the portion between the bottomed groove portions 4 b) is fitted into each cut portion 7 of the tread plate 2, and the edge portion of each cut portion 7 is fitted into the fitting groove 4. That is, the side edge portion of the cut portion 7 of each tread plate 2 is close to the vertical rear end surface of the bottomed groove portion 4b of the fitting groove 4, and the front edge portion of the peripheral portion of each cut portion 7 is the cut groove portion 4a. And the edges on both sides are fitted into the bottomed groove 4b. In addition, each tread 2 is fixed to the girder 1 with a woodworking adhesive and a nail in the cut portion 7.

  When the tread plate 2 is attached to the girder 1 in this way, the end portions on both sides in the longitudinal direction of the groove communication recess 18 of the tread plate 2 (the end portions on both sides in the longitudinal direction of the storage recess 11) are the girder side wiring groove portions. 6 to communicate with each other. That is, in this case, the openings at the rear of both ends in the longitudinal direction of the groove communication recess 18 of the tread plate 2 are openings 6 a formed by passing the girder-side wiring groove 6 through the rear end surface of the fitting groove 4. At the same time, the opening below the same end communicates with the opening 6b formed by passing the girder-side wiring groove 6 through the lower end surface of the fitting groove 4, and the same end. The opening on the side of the notch 7 communicates with a portion overlapping the fitting groove 4 of the girder-side wiring groove 6 formed deeper than the fitting groove 4 in a side view. Therefore, by simply attaching the tread plate 2 to the girder 1 in this way, a passage for the continuous wiring 13 leading from the front end of the housing groove 9 to the girder-side wiring groove portion 6 through the housing recess 11 is formed.

  The wiring cords 13a and 13b of the lighting unit 3 drawn out from the respective treads 2 are connected to the wiring cord 13b of the lighting unit 3 of the upper tread plate 2 and the wiring cord 13a of the lighting unit 3 of the lower tread plate 2 via connectors 20a and 20b. Next, the wiring cords 13a and 13b drawn out from the tread 2 of each lighting unit 3 are accommodated in the girder-side wiring groove 6 of the girder 1 including the connectors 20a and 20b at the end, and thereafter 12, the wiring cords 13 a and 13 b in the girder-side wiring groove 6 are hidden by attaching a wiring cover 24 to the girder-side wiring groove 6.

  As described above, the wiring cords 13a and 13b drawn out from the longitudinal ends of the groove communication recesses 18 of the respective treads 2 are accommodated in the girder-side wiring groove 6 so as to be connected to the lighting units 3 of the respective treads 2. The two wiring cords 13a and 13b can be housed in a continuous path including the tread plate side wiring groove portion 17, the groove communication recess portion 18, and the girder side wiring groove portion 6, and these tread plate side wiring groove portion 17 and the groove communication recess portion. 18, the wiring cords 13a and 13b passed through the girder-side wiring groove 6 in order are covered with the wiring covers 19a, 19b and 24.

  Here, as shown in FIG. 3, each insertion groove 4 of the girder 1 is formed to a position extending beyond the girder-side wiring groove 6 and to the rear of the girder-side wiring groove 6. Since the side edge portion of the cut groove portion 4 a of the tread plate 2 is fitted into the bottom groove portion 4 b, the wiring cover 24 cannot be provided over the entire length of the girder side wiring groove portion 6. For this reason, the wiring cover 24 is provided in a portion excluding a portion overlapping the fitting groove 4 such as a portion between the fitting grooves 4 in the digit-side wiring groove portion 6, that is, the wiring cover 24 is provided in each portion in the digit-side wiring groove portion 6. It is provided above and below the fitting groove 4. These wiring covers 24 are formed by cutting a long cover material 28 made of synthetic resin and having a predetermined length as shown in FIG. Similar to the cover material 21 on the side of the tread board 2, the cover material 28 includes a cover portion 29 that closes the opening on the outer side of the girder-side wiring groove portion 6, and fitting pieces 30 that protrude from both sides of the cover portion 29. Each wiring cover 24 formed from the material 28 is attached so that the outer surface of the covering portion 29 is substantially flush with the side surface of the girder 1 by fitting the fitting pieces 30 on both sides inside the girder-side wiring groove portion 6. .

  As shown in FIG. 14, the lower end surface of the wiring cover 24 that is positioned above the fitting groove 4 in a state where the wiring cover 24 is attached to the beam 1 is perpendicular to the bottomed groove portion 4 b of the fitting groove 4. It is cut so as to be parallel to the rear end face, and the upper end face of the wiring cover 24 located below the fitting groove 4 is cut so as to be parallel to the horizontal lower surface of the bottomed groove portion 4b of the fitting groove 4. Both of them are inclined surfaces inclined with respect to the longitudinal direction of the wiring cover 24, and the wiring cover 24 between the fitting grooves 4 has the inclined end surface opposed to the longitudinal end portion of the storage recess 11. It is. Therefore, in a state where the tread plate 2 is fitted in each fitting groove 4, each wiring cover 24 has an appearance that is continuous in a straight line.

  Further, as shown in FIG. 1, the lighting unit 3 provided on the uppermost or lower tread 2 is attached to the upper or lower floor wall 25 by the wiring 13 passing in order from the girder side wiring groove 6, the floor 5, and the back of the wall 25. The lighting unit 3 is connected to the provided controller 26, so that the lighting state of each lighting unit 3 can be changed by operating the switch 27 on the upper floor or the lower floor connected to the controller 26. The switch 27 may have a function of detecting a human body by a human body detection unit such as a heat ray sensor and automatically changing the lighting state of the lighting unit 3.

  As described above, in the illuminated staircase of the present invention, the tread board-side wiring groove portion 17 extending rearward from the front portion of the tread board 2 in the vicinity of the illumination means is formed on the lower surface of the tread board 2, and the tread board 2 is provided behind the tread board side wiring groove portion 17. A groove communication recess 18 that communicates with the end portion is formed, and the spar 1 is fitted into the notch 7 that is open to the rear formed in the tread plate 2 and the edge of the notch 7 is formed in the front of the spar 1 In the state where it is fitted in the fitting groove 4 that opens, the groove communication recess 18 is communicated with the girder-side wiring groove 6 that extends in the longitudinal direction of the girder 1 formed on the side surface of the girder 1, thereby cutting the tread plate 2. In the open staircase in which the girder 1 is fitted into the notch 7 and the edge of the notch 7 is fitted in the fitting groove 4 of the girder 1 and connected, the groove communication recess 18 is formed from the front end of the tread board side wiring groove 17. A passage for the continuous wiring 13 that leads to the girder-side wiring groove 6 can be formed through this, and thereby, under the front portion of each tread 2 The wiring 13 connected to the illumination means provided in the cable is led out to the girder-side wiring groove 6 through the tread board-side wiring groove 17 and the groove communication recess 18 in this order, and the upper floor and the lower floor via the girder-side wiring groove 6. The controller 26 can be routed.

  Further, in this example, the girder-side wiring groove 6 is formed so as to cross the fitting groove 4, and the fitting groove 4 is formed to a position extending rearward from the girder-side wiring groove 6. Since the wiring cover 24 covers the portion excluding the portion overlapping with the groove 4, a dimensional error occurs in the tread plate 2 fitted in the fitting groove 4, and the tread plate 2 is inserted between the rear end surface of the tread plate 2 and the rear end surface of the fitting groove 4. Even if a gap is generated, the tread plate 2 can be disposed so as to cross the girder side wiring groove portion 6, and in this case, the inclined end surface of the wiring cover 24 disposed above and below the fitting groove 4 is used as the rear end surface of the tread plate 2. Since it can abut against the lower surface without any gap, the end opening on the fitting groove 4 side of the passage for the wiring 13 formed between the girder-side wiring groove 6 and the wiring cover 24 can be hidden by the tread plate 2. it can. That is, in this case, the dimensional error of the tread plate 2 can be absorbed by the extent that the fitting groove 4 protrudes rearward from the girder-side wiring groove portion 6.

  Further, in this example, a storage recess 11 is formed at the rear end of the tread plate 2, a cover base 15b having a U-shaped cross section is stored in the storage recess 11, and a groove communication recess is formed between the storage recess 11 and the cover base 15b. Since the wiring 13 passing through the groove communication recess 18 is covered with the wiring cover 19b attached to the cover base 15, the wiring 13 in the groove communication recess 18 is substantially the same as the lower surface of the tread plate 2. The appearance can be improved by covering with the wiring cover 24 that is flush with the surface. In addition, it is preferable that the outer surface of the cover part 22 of the wiring covers 19a and 19b covering the tread board side wiring groove 18 has the same color as the tread board 2 or has the same grain pattern as the tread board 2. The covers 19a and 19b are not conspicuous. Similarly, it is also preferable that the outer surface of the covering portion 29 of the wiring cover 24 covering the girder-side wiring groove portion 6 has the same color as that of the girder 1 or has a woodgrain pattern similar to that of the girder 1.

  Further, the above-mentioned illuminated staircase is provided on the tread board 2 by providing the girder side wiring groove portions 6 on the girder 1 on both sides and forming the groove communication recesses 18 from the rear end portion of the tread board side wiring groove portion 17 toward both sides. Although the wiring 13 of the lighting unit 3 can be led out to the girder-side wiring groove 6 of either the left or right girder 1, the girder-side wiring groove 6 is provided only in one girder 1 and the rear end of the tread board-side wiring groove 17 The groove communication recess 18 may be formed only toward the girder 1 side where the girder-side wiring groove 6 is provided. Further, in the illuminated staircase, the girders 1 are arranged on both sides of the tread board 2 and the notches 7 are provided on both sides of the tread board 2, and these notches 7 are fitted into the girders 1, for example, the tread board 2 As shown in FIG. 15, the girder 1 is arranged only on one side of the tread plate 2, and a notch 7 is provided only on one side of the tread plate 2, and the notch 7 is fitted into the girder 1 arranged on one side of the tread plate 2 and the other side. May be connected to the wall 25 or the like.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates an example of an embodiment of the present invention, and is a side view of an illuminated staircase with illustration of a tread board omitted. It is a side view of a digit same as the above. It is the A section enlarged view of FIG. The tread board same as the above is shown (a) is a bottom view, and (b) is a side view. (A) is a perspective view of a cover base material, (b) is a perspective view of a cover material for a tread, and (c) is a perspective view of a cover material for a girder. It is a perspective view which shows the state before attaching an illumination unit and a cover base to a tread board same as the above. It is a perspective view which shows the state before attaching a wiring cover to a tread board same as the above. It is the perspective view which showed the notch part of the cover base provided in the recess 18 for groove | channel communication same as the above, and the wiring cover which covers this by hatching. It is a principal part expansion perspective view of a footboard same as the above. It is a perspective view which shows the state before attaching a tread board same as the above to a girder. It is a perspective view which shows the state which fitted the tread plate same as the above in the insertion groove | channel of the girder. It is BB 'sectional drawing of FIG. It is a perspective view of an illumination unit same as the above. It is the side view used in order to explain cutting of the wiring cover material for girders. It is a bottom view of the tread of another example. It is a side view of the conventional illuminated staircase.

Explanation of symbols

1 girder 2 tread 6 girder side wiring groove 7 notch 9 tread side wiring groove 17
11 Groove communication recess 18
13 Wiring 19b Wiring cover 24 Wiring cover

Claims (3)

  Lighting means is provided on the lower surface of the front part of the tread, and a tread-side wiring groove extending rearward from the front part of the tread near the lighting means is formed on the lower surface of the tread, and communicated with the rear end of the tread-side wiring groove The groove communication recess is formed, and the girder is fitted into the rear notch formed in the tread, and the edge of the notch is fitted in the front fitting groove formed in the girder. The illuminated staircase is characterized in that the groove communication recess is communicated with a girder side wiring groove extending in the longitudinal direction of the girder formed on the side surface of the girder.   A portion excluding a portion overlapping the fitting groove of the girder-side wiring groove portion, forming the girder-side wiring groove portion so as to cross the fitting groove, and forming the fitting groove to a position extending rearward from the girder-side wiring groove portion. The illuminated staircase according to claim 1, wherein the step is covered with a wiring cover. A storage recess is formed at the rear end of the tread, a cover base having a U-shaped cross section is stored in the storage recess, and a groove communication recess is formed by the storage recess and the cover base. The illuminated staircase according to claim 1 or 2, wherein the wiring passed through the place is covered with a wiring cover attached to the cover base.

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