JP2009013711A - Open staircase - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an open staircase enhanced in productivity in plant and installation workability at site. <P>SOLUTION: This open staircase is formed of two parts comprising a staircase unit 2 for ascending installed on the floor surface FL1 of a lower story and a staircase unit 3 for communication for connecting the staircase unit 2 with an upper story FL2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an open staircase suitable for ascending and descending between a lower floor and an upper floor in a building.

  Conventionally, an open staircase in which a footboard is separated from a wall panel is known as a kind of staircase for raising and lowering between an upper floor and a lower floor in a building. Is installed between the lower floor and the upper floor, and between the lower floor and the landing above it.

  In recent years, staircases have been unitized for reasons such as cost reduction due to factory production, shortening of work and delivery times, and improvement of installation workability (see, for example, Patent Document 1).

  Therefore, a unitized open stairs has been proposed. (For example, refer to Patent Document 2).

  Moreover, as an open staircase, there exist a straight type thing installed in a plane belt | band | zone shape, an L type thing installed in a plane L shape, etc.

JP 11-343714 A JP 2003-193650 A

  By the way, in recent years, there has been a demand for higher performance of various products, and as one of the higher performance of various products, more improvement in factory productivity and on-site installation workability is required even in open stairs. It has been.

  The present invention has been made in view of this point, and it is an object of the present invention to provide an open stair that can more easily improve productivity in a factory and improve installation workability on site.

  In order to achieve the above-described object, the open staircase according to the present invention is characterized in that, in the open stair that connects the lower floor and the upper floor, the stair unit for the rising door installed on the floor of the lower floor, and the rising staircase unit. And a stairs unit for communication for connecting between the upper floor and the upper floor. By adopting such a configuration, it is possible to easily reduce the price, improve the delivery time, and improve the installation workability at the site by improving the productivity in the factory.

  It is preferable that the rising stair unit and the communication stair unit are configured to be connectable by a connecting member. By adopting such a configuration, it is possible to easily integrate the rising stair unit and the communication stair unit. As a result, the strength of the rising stair unit is reinforced, so that it is possible to prevent the rising stair unit from being bent, shaken, and shaken.

  The climbing stair unit includes two or three climbing footboards, and a lifting support main body standing on the floor of the lower floor in order to support each of the lifting footboards from below. The rising support body is a front end edge of the first-stage lift foot plate disposed on the floor side of the lower floor of the lift foot plates, and a final stage disposed on the uppermost floor side. Each of the above-mentioned stepping-up footboards is arranged in a stepped manner with a step so that the angle formed with the rear edge of the stepping-up stepping plate is a plane right angle. A plurality of communication treads formed in a flat plate shape; and a communication support body for supporting each of the plurality of communication treads from below. Tread There are those which are arranged by providing a stepped linearly, wherein A Agariguchi staircase unit and the contact stepped unit, preferably being formed so as to form a flat strip as a whole. By adopting such a configuration, the two-step or three-step staircase unit for the rising mouth can be moved up and down without changing the stride, and can be easily moved up and down. Furthermore, the length in the longitudinal direction of the staircase installation space required for the staircase installation can be shortened as compared to the conventional straight type open staircase.

  The upward support body includes a support plate that supports each of the upward foot treads from below, and a parent post that is erected on the floor of a lower floor and to which all ends of the support plates are fixed with steps. It is preferable to have a child support column that is erected on the floor surface of the lower floor and individually supports the other end of the lower surface of each support plate from below. By adopting such a configuration, the configuration can be simplified and installation work can be easily performed.

  The communication support body includes a support member that supports each of the plurality of communication treads from below, and the plurality of communication treads arranged between the rising step unit and the upper floor. A pair of girder bodies, which are disposed so as to be opposed to each other between the unit and the upper floor, and on which the support member is fixed along the arrangement direction of the plurality of treads for communication, and a floor on the lower floor It is preferable to have a pair of girder support columns which are erected on the surface and support each of the end portions on the lower floor side of the pair of girder bodies from below. By adopting such a configuration, the configuration can be simplified and installation work can be easily performed.

  It is preferable that each of the parent strut and the child strut is disposed on an inner side of an extension line of a region along both longitudinal edges of the communication tread. And by adopting such a structure, the flow line at the time of raising / lowering can be made smooth, and beautiful appearance quality can be obtained.

  The sub struts of the support plate that supports at least the final stage of each of the stepping-up plates for the upward opening from below are disposed on an extension line along one longitudinal direction of the pair of beam bodies. preferable. And by employ | adopting such a structure, the positioning of the connection unit with respect to the rising unit 2 at the time of installation work, or the rising port with respect to a connection unit can be performed easily and reliably.

  It is preferable that the pair of girder main bodies is formed of extruded aluminum or aluminum alloy. And by employ | adopting such a structure, a girder main body can be manufactured easily and weight reduction can be achieved easily.

  In the open staircase according to the present invention, it is preferable that a stair railing is provided. And by employ | adopting such a structure, the fall of the person who goes up and down can be prevented reliably.

  According to the open staircase according to the present invention, it is divided into two parts: a stair unit for an exit installed on the floor of a lower floor, and a stair unit for communication for communicating between the upper stair unit and the upper floor. As a result, it is possible to easily improve the productivity in the factory and the installation workability on the site.

  The present invention will be described below with reference to embodiments shown in the drawings.

  1 to 5 show an embodiment of an open staircase according to the present invention. FIG. 1 is a front view of a main part in an installed state, FIG. 2 is a side view, FIG. 3 is a plan view, and FIG. FIG. 5 is an enlarged front view of a connecting portion between the rising stair unit and the communication stair unit.

  The open staircase of the present embodiment has 13 steps between the first floor, which is the lower floor, and the second floor, which is the upper floor, in the atrium provided inside the building that is the installation site. The structure which can be moved up and down in communication, that is, the structure of 14 steps up and down is illustrated.

  As shown in FIGS. 1 to 5, the open staircase 1 according to the present embodiment includes a rising stair unit 2 (hereinafter simply referred to as a rising unit) installed on the floor FL1 on the first floor, and the rising unit 2. And a stairs unit 3 for communication (hereinafter simply referred to as a communication unit) for communicating between the floor 2 and the floor FL2 on the second floor. That is, the open staircase 1 of the present embodiment is divided into two parts, that is, the rising unit 2 and the connecting unit 3.

  The rising port unit 2 is formed in a substantially square shape on the plane, and the connecting unit 3 is formed in a substantially rectangular shape on a long plane along the ascending / descending direction (FIG. 3). Further, the rising port unit 2 and the communication unit 3 are connected and integrated by a connecting member 4 in the installed state, and are formed so as to form a flat belt as a whole. Further, the open staircase 1 according to the present embodiment includes a back side in the vertical direction in FIG. 1 (left side in FIG. 2 and an upper side in FIG. 3), a left side in FIG. 1 (a front side in the vertical direction in FIG. 2 and a left side in FIG. 3). ) Is the panel side PS on which the wall panel P is installed.

  The rising unit 2 includes three rising foot plates 5 made of a material such as natural wood, synthetic wood, and laminated lumber, and each of the three rising foot plates 5 from below to support 1 And a rising support body 6 standing on the floor FL1 of the floor.

  One of the three rising foot treads 5 is a first rising foot tread 5a (hereinafter simply referred to as a first step treading plate) disposed on the floor FL1 side of the first floor, and the remaining two treads 5 are the same. One is the last-stage lift board 5c (hereinafter simply referred to as the last-stage footboard) arranged on the uppermost floor side, and the last remaining one is arranged between the first stage and the last stage. Middle stepping plate 5b (hereinafter simply referred to as a middle stepping plate). Further, the three rising foot treads 5 (reference numeral 5 is a general term for the first step tread plate 5a, the last step tread plate 5c, and the middle step tread plate 5b) include a front edge 7 shown below the first step tread plate 5a in FIG. Steps 5c are arranged in a staircase pattern so that the angle between the tread plate 5c and the rear edge 8 shown on the right side of FIG. 3 is a right angle.

  The rising mouth unit 2 of the present embodiment is formed by three rising mouth treads 5 so as to have a level difference of about 200 mm, i.e., a three-step height (height) of 200 mm.

  The first step tread plate 5a is formed into a substantially right triangle plate shape with the lower left corner of FIG. 3 as a right angle as a whole, and the last step tread plate 5c is substantially flat as a whole with the upper right corner of FIG. 3 as a right angle. It is formed in the shape of a right triangle plate. Further, the middle stepping plate 5b has a right upper corner in FIG. 3 and a lower right corner in FIG. 3 located on a diagonal line of a right angle from each of two adjacent sides across the right angle. The two hypotenuses extending toward the bottom and the short sides connecting the lower right corners in FIG. 3 of the two hypotenuses as a whole are formed into a substantially elongated pentagonal plate shape.

  The upward opening support body 6 includes three support plates 9 that support the three upward opening foot plates 5 from below. These three support plates 9 are made of aluminum or an aluminum alloy. Of the three support plates 9, one is a first-stage support plate 9a that supports the first-stage tread plate 5a from below, and one of the remaining two plates is a last-stage support that supports the last-step tread plate 5c from below. The last remaining sheet is a middle stage support board 9b that supports the middle stage floor board 5b from below. In addition, the planar shape of each support plate 9 (symbol 9 is a generic term for the first-stage support plate 9a, the final-stage support plate 9c, and the middle-stage support plate 9b) is slightly reduced from the corresponding planar shape of the step-up plate 5 for the rising opening. It is formed to have a similar shape.

  Each of the three support plates 9 is disposed so that the upper surface is substantially horizontal, and one end of each of the three support plates 9, in this embodiment, the lower right corner end of FIG. 3 is on the floor FL 1 on the first floor. It is attached and fixed to the outer peripheral surface of the upright parent strut 10 with a preset step. In other words, the three support plates 9 are attached to the outer peripheral surface of the parent support column 10 in a plan view. Further, the other end side of the lower surface of each of the three support plates 9 opposite to the side on which the parent support column 10 is attached supports the floor FL1 on the first floor in order to individually support each of the three support plates 9 from below. It is attached and fixed to the upper end surface of the child support | pillar 11 standingly installed in this.

  That is, the first-stage support plate 9a is supported by the first-stage support column 11a as the child column 11 that individually supports the parent column 10 and the first-stage support plate 9a from below, and the final-stage support plate 9c is The stage support plate 9c is supported by a final stage support column 11c as a support column 11 that individually supports the column support plate 9c from below, and the intermediate support plate 9b supports the parent column 10 and the intermediate support plate 9b individually from below. Is supported by a middle step support column 11b.

  Therefore, the support body 6 for the rising mouth of the present embodiment is erected on the support plate 9 that supports each of the footboards 5 for the upward opening from below and the floor FL1 on the first floor, and all the one ends of the respective support plates 9 are Sub struts 11 (reference numeral 11 is a first stage child) which is vertically installed on a floor FL1 on the first floor and supports the other end of each lower surface of each support plate 9 individually from below. The column 11a, the final stage column 11c, and the middle column 11b are collectively referred to.).

  The parent column 10 and each child column 11 of the present embodiment are formed in a cylindrical shape from aluminum or an aluminum alloy. Of course, the parent column 10 and the child column 11 may be in the shape of a rectangular tube or a rod. In addition, it is good also as a structure which provides the some support | pillar 11 with respect to the support plate 9 of 1 sheet. In addition, it is preferable to attach a cap to the upper end portion of the parent support column 10 in the sense that the appearance quality can be further improved.

  The parent strut 10 and each child strut 11 are located on the inner side of the extension line of the region along both longitudinal edges of the communication step board 15 that constitutes a part of the communication unit 3 described in detail later, that is, of the communication step board 15. Arranged between the virtual plane including one end in the longitudinal direction and the virtual plane including the other end, the communication unit 3 with respect to the rising unit 2 at the site or the arrangement of the rising unit 2 with respect to the communication unit 3 It can be done easily. As a result, it is possible to improve the installation workability on site.

  Further, the final stage support column 11c is arranged on an extension line along one longitudinal direction shown in the upper part of FIG. 3 in the pair of beam bodies 18, and the middle stage support column 11b is shown in the upper part of FIG. It is arranged along the longitudinal direction of the girder body 18 at a distance from the final stage support column 11 c, and it is possible to easily arrange the connecting unit 3 for the rising port unit 2 or the rising port unit 2 for the connecting unit 3 in the field. It can be done. As a result, it is possible to improve the installation workability on site.

  In addition, the virtual line | wire which connects each of the first stage | paragraph support | pillar 11a and the middle stage | paragraph support | pillar 11b is arrange | positioned at intervals along the longitudinal direction of the tread 15 for communication, and the imaginary line | wire which connects the last stage | paragraph support | pillar 11c and the intermediate | middle stage support | pillar 11b The line and the virtual line connecting the middle stage support column 11b and the first stage support column 11a are arranged so as to form a right angle. As a result, positioning (positioning) of the connecting unit with respect to the rising port unit 2 or the rising port with respect to the connecting unit during installation work can be performed easily and reliably. As a result, it is possible to improve the installation workability on site.

  Therefore, each of the first stage support post 11a, the middle stage support post 11b, and the final stage support post 11c is disposed at three corners of a right triangle having the middle stage support post 11b as a right angle corner.

  Further, as shown in FIG. 3, the rising edge unit 2 of the present embodiment is such that the front end edge 7 of the first step tread plate 5a is orthogonal to the arrangement direction (lifting direction) shown in the left-right direction in FIG. 3 is arranged so as to be flush with one end in the horizontal direction, that is, the end edge of the longitudinal direction of the communication tread plate 15 shown in the lower part of FIG. 3, and the communication unit 3 for the rising unit 2 in the field or the communication unit 3 The arrangement of the riser unit 2 with respect to, that is, the alignment can be easily performed. As a result, on-site installation workability can be improved, and a beautiful appearance quality can be obtained.

  Reinforcing ribs 12 made of aluminum or an aluminum alloy plate are fixed to the lower surface of each support plate 9 with its thickness direction oriented in the horizontal direction. Further, the base end portions of the pair of connecting members 4 formed of aluminum or an aluminum alloy plate are fixed to the lower surface of the final stage support plate 9c, and the distal end portions of the connecting members 4 are respectively It is attached to a pair of beam support columns 19 constituting a part of the communication unit 3 described in detail later (FIGS. 1 and 5).

  The communication unit 3 includes a plurality of, in the present embodiment, 10 contact foot plates 15 formed of a material such as natural wood, synthetic wood, and laminated wood, and each of the 10 contact foot plates 15 is provided below. And a support body 16 for communication.

  Each of the communication footplates 15 is formed in a planar rectangular shape in which the lateral direction perpendicular to the arrangement direction (lifting direction) shown in the horizontal direction of FIG. Further, the length in the longitudinal direction of each communication foot plate 15 is substantially equal to the length of the rear edge 8 of the final step foot plate 5c. In addition, it is preferable that the material of the communication footboard 15 is formed of the same material as the material of the rising footboard 5 in the sense that a wide variety of footboards can be efficiently formed. Of course, the material of the communication footboard 15 and the material of the upward footboard 5 may be different from each other.

  The connecting support body 16 is for arranging ten connecting stepping plates 15 in a straight line between the rising unit 2 and the floor FL2 on the second floor. The communication support body 16 includes a support member 17, a pair of beam bodies 18, and a pair of beam support columns 19.

  The support member 17 is for supporting each of the communication treads 15 from below. The support member 17 is made of aluminum or aluminum alloy and has a substantially inverted triangular frame shape shown in FIG. It is formed into a shape. As these support members 17, two (a total of 20) support members 17 are used for one communication tread.

  The pair of girder main bodies 18 are for arranging ten connecting treads 15 between the riser unit 2 and the floor FL2 on the second floor, and have a vertically long cross section made of extruded aluminum or aluminum alloy. It is formed in a cylindrical shape and is inclined and arranged in accordance with the gradient of the stairs so as to face each other at a predetermined interval. On each upper surface of the pair of girder bodies 18, 20 support members 17 (10 support members 17 with respect to one girder body 18) are arranged at 10 intervals with a predetermined interval. It is fixed along the arrangement direction of the communication treads 15. Also, the upper floor side ends of the pair of girder bodies 18 are fixedly attached to a wall panel P disposed below the front surface of the floor FL2 on the second floor (FIG. 1).

  The pair of girder support columns 19 are for supporting the first floor FL1 side end of the pair of girder bodies 18 from below, and are vertically long cylinders made of extruded aluminum or aluminum alloy. It is formed in a shape. The pair of girder support columns 19 are erected on the floor FL1 on the first floor with their lower ends attached to the floor FL1 on the first floor. The pair of girder support columns 19 are arranged so that the upper ends of the pair of girder support columns 19 support the end on the floor FL1 side of the first floor of the pair of girder bodies 18 from below. The upper end of each column 19 is connected to the first floor of a pair of beam bodies 18 with bolts or the like via at least two connection plates 20 (only one portion is shown in FIG. 1) with respect to one beam support column 19. It is attached and fixed to the end of the floor FL1 side.

  Therefore, the interval between the pair of beam support columns 19 is configured to be the same as the interval between the pair of beam bodies 18.

  In addition, as a raw material of the connection plate 20, aluminum or an aluminum alloy is preferable, and a steel plate may be used as necessary for a design concept or the like.

  As shown in FIGS. 1, 4 and 5, the pair of connecting members 4 are attached to the surfaces of the pair of girder bodies 18 on the side of the upward opening unit 2 with bolts or the like in the installed state. The rising port unit 2 and the connection unit 3 are connected and integrated by a pair of connecting members 4.

  The communication unit 3 according to the present embodiment is arranged so that the ten communication step plates 15 have a level difference of about 200 mm, that is, the kick-up dimension is about 200 mm. Are arranged in a straight line so as to form a long planar rectangle along the arrangement direction shown in the horizontal direction.

  As shown in FIG. 1, a stair rail 21 is attached to the communication unit 3 of the present embodiment on the side opposite to the wall panel P in the installed state. The stair rail 21 is a conventionally known one composed of a main pillar, a small pillar, a drop-off prevention bar, a headboard, a drop-off prevention panel, and the like, and detailed description thereof will be omitted.

  The stair railing 21 can be selected and used from various conventionally known ones according to the necessity of a design concept or the like.

  Therefore, the open staircase 1 according to the present embodiment is raised by 14 steps by the three riser footboards 5 of the riser unit 2 and the ten contact footboards 15 arranged in a straight line of the communication unit 3 subsequent thereto. It is configured to be cut.

  Moreover, the flow line 23 at the time of the raising / lowering by the open staircase 1 of this embodiment has a planar L shape as shown by the two-dot chain double arrow in FIG.

  It should be noted that the number of stepping-up plates 5 for the rising opening unit 2 may be two as required according to the specifications of the installation site.

  In other words, the number of the stepping plate 5 for the rising unit 2 can be selected from two or three as required according to the specifications of the installation site, etc. The number can be increased or decreased according to the specifications of the installation site.

  Next, the operation of the present embodiment having the above-described configuration will be described.

  The open staircase 1 according to the present embodiment has ten support members 17 fixed to a support body 6 for rising mouth (the base end of the connecting member 4 is fixed) and one girder body 18 by factory production. The sub-unit (two sets), the pair of girder support columns 19, the three riser treads 5, the ten contact treads 15, and the three riser treads 5 are attached to the riser support body 6. Bolts for connecting the 10 connecting treads 15 to the support member 17 of one girder body 18, at least 4 for connecting the pair of girder support columns 19 and the pair of girder bodies 18. For connecting the upper floor side of the pair of girder main bodies 18 to the wall panel P, the connecting parts 20 and the bolts, and the child parts such as bolts and stays for installing the support body 6 for the upward opening on the floor FL1 side of the first floor Bolts and studs Child part of, and the like, and, to ship with a set of stairs handrail 21 to set.

  Of course, 10 communication footplates 15 may be incorporated into two sets of subunits, or three upward footstep plates 5 may be incorporated into the upward support body 6. However, since the weight of one unit increases, For the installation work, a work device such as a large hoist or crane is required.

  In addition, at the installation site, by installing one set received from the factory in a predetermined order, as shown in FIG. 1, wall panels disposed below the front of the floor FL1 on the first floor and the floor FL2 on the second floor. Open staircase 1 is installed between P and P. At this time, since a part of the open staircase 11 is a unit, the installation work can be performed in a short time.

  Thus, according to the open staircase 1 of the present embodiment, it is divided into two parts, the rising unit 2 installed on the floor FL1 on the first floor and the connecting unit 3 for communicating between the rising unit 2 and the upper floor. Since it is formed, it is possible to easily reduce the price, shorten the delivery date, and improve the installation workability at the site by improving the productivity in the factory.

  Further, according to the open staircase 1 of the embodiment, the rising port unit 2 and the connecting unit 3 are configured to be connectable by the connecting member 4, so that the rising port unit 2 and the connecting unit 3 can be easily integrated. Can be. As a result, the strength of the riser unit 2 is reinforced, so that the riser unit 2 can be prevented from bending, shaking, and shaking.

  In addition, according to the open staircase 1 of the embodiment, the rising unit 2 having three steps and the linear connecting unit 3 are formed so as to form a flat belt as a whole. Since the riser unit 2 can be raised and lowered without changing the stride, it can be easily raised and lowered. In addition, it is necessary for the installation of stairs compared to the conventional straight type open stairs (where the flow line during ascending and descending linearly between the first floor FL1 and the upper floor is linear) The length in the longitudinal direction shown in the left-right direction in FIG. 3 of the appropriate staircase installation space can be shortened.

  Specifically, in the conventional straight type open staircase, a 750 mm marginal space for a person to pass along the longitudinal direction of the staircase and to pass through the mouth portion is required in the Building Standard Law. In the open staircase 1, it is not necessary to provide this extra space on the left side of FIG. 3, and the left end of FIG.

  That is, in the open staircase 1 of the present embodiment, a margin space required in the conventional open staircase can be used as at least a part of the installation space of the rising unit 2, which contributes to a gentle staircase gradient.

  For example, when the floor height is 2800 mm, the kicking is 200 mm, and 14 steps are raised, in the open staircase 1 of this embodiment, the length of the rising unit 2 shown in the left-right direction in FIG. The total length of the stairs shown in FIG. 3 is 3276 mm with a total length of 3276 mm, and the slope of the staircase can be 41.28 °, whereas in the conventional straight type open staircase, the total length of the staircase is 3376 mm. Then, since an extra space of 750 mm is required at the rising port, the length of the actual staircase portion is 2600 mm, and the slope of the staircase is clearly 45 °.

  In addition, according to the open staircase 1 of the embodiment, the rising support body 6 is erected on the support plate 9 that supports each of the lift plate 5 from below and the floor FL1 on the first floor. It has a main strut 10 whose one end is fixed with a step, and a child strut 11 that stands on the floor FL1 on the first floor and supports the other end of each lower surface of each support plate 9 individually from below. Therefore, the configuration can be simplified and the installation work can be easily performed.

  Further, according to the open staircase 1 of the embodiment, the communication support body 16 is provided between the support member 17 that supports each of the plurality of communication treads 15 from below, the rising unit 2 and the floor FL2 on the second floor. In order to arrange the plurality of treads 15 for communication, they are inclined so as to face each other between the rising unit 2 and the floor FL2 of the floor, and a support member 17 is arranged on the upper surface in the arrangement direction of the plurality of treads 15 for communication. A pair of girder main bodies 18 fixed along the first floor and a pair of girder support columns 19 that stand on the floor FL1 on the first floor and support the lower ends of the pair of girder bodies 18 from below. Therefore, the configuration can be simplified and the installation work can be easily performed.

  Further, according to the open staircase 1 of the embodiment, each of the parent support column 10 and the child support column 11 is disposed on the inner side of the extension line of the region along both longitudinal edges of the communication tread plate 15. The flow line 23 at the time can be made smooth, and a beautiful appearance quality can be obtained.

  Further, according to the open staircase 1 of the embodiment, the final step column 11c that supports the final step plate 5c from below is extended along one longitudinal direction of the pair of girder bodies 18 shown in the upper part of FIG. Since it is arranged on the line, positioning (positioning) of the connecting unit with respect to the rising port unit 2 or the rising port with respect to the connecting unit at the time of installation work can be performed easily and reliably.

  Further, according to the open staircase 1 of the embodiment, since the pair of girder main bodies 18 are formed of extruded aluminum or aluminum alloy, the girder main body 18 can be easily manufactured and reduced in weight. Can be easily achieved.

  In addition, in the open staircase 1 of the embodiment, the length of the girder body 18 itself can be shortened because the rising unit 2 and the connecting unit 3 are divided into two. Thereby, the productivity of the girder body 18 can be improved. Further, by dividing the girder body 18 and the girder support column 19 into a structure in which the girder body 18 and the girder support column 19 are integrally formed by bending a long girder, the cost can be reduced. Can be planned. In other words, forming a long girder by extrusion processing is inferior in productivity, and the bending of a long girder with high accuracy is highly technical, skilled by workers, and expensive equipment. Necessary.

  Moreover, according to the open staircase 1 of the embodiment, since the stair railing 21 is provided, it is possible to reliably prevent a person moving up and down from falling.

  In addition, this invention is not limited to embodiment mentioned above, A various change is possible as needed. For example, a wooden staircase (box staircase) can be used as the communication unit. With such a configuration, the degree of freedom in design is improved.

The front view which shows the principal part in the installation state of embodiment of the open staircase which concerns on this invention Side view of essential parts of FIG. Plan view of the main part of FIG. FIG. 1 is an enlarged plan view of the main part of the support body for the rising mouth of FIG. (A) And (b) shows the principal part of the connection part of the stair unit for exits of FIG. 1 and a connection stair unit, (a) is an enlarged front view which shows the principal part of one connection part, (B) is the enlarged front view which shows the principal part of the other connection part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Open staircase 2 Climbing unit 3 Connecting unit 4 Connecting member 5 Climbing plate for rising port 6 Supporting body for rising port 7 Front end edge 8 Rear end edge 9 Supporting plate 10 Parent strut 15 Connecting stepping plate 16 Supporting supporting body 17 Supporting member 18 Girder body 19 Girder support column 20 Connection plate 21 Stair railing 23 Flow line FL1 (1st floor) FL2 (2nd floor) P Wall panel PS Panel side

Claims (9)

In the open stairs that connects the lower and upper floors,
2. An open staircase characterized in that it is divided into two parts: a stair unit for a rising exit installed on a floor of a lower floor, and a stair unit for communication for connecting the rising stair unit and the upper floor.   The open staircase according to claim 1, wherein the rising stair unit and the communication stair unit are configured to be connectable by a connecting member. The climbing stair unit includes two or three climbing footboards, and a lifting support main body standing on the floor of the lower floor to support each of the lifting footboards from below. And
The rising support body includes a front edge of a first-stage rising foot plate disposed on the floor side of the lower floor of each of the rising foot plates, and a final rising foot plate disposed on the uppermost floor. Each of the above-mentioned footboards for rising mouth is arranged in a stepped manner with a step so that the angle formed with the rear edge is a plane right angle,
The communication stair unit includes a plurality of communication treads formed in a flat plate shape, and a contact support body for supporting each of the plurality of communication treads from below,
The communication support body is a plurality of the communication tread plates arranged in a straight line with steps.
The open staircase according to claim 1 or 2, wherein the rising stair unit and the connecting stair unit are formed as a flat band as a whole.   The upward support body includes a support plate that supports each of the upward foot treads from below, and a parent post that is erected on the floor of a lower floor and to which all ends of the support plates are fixed with steps. 4. An open as claimed in claim 3, further comprising a child support column which is erected on the floor surface of the lower floor and individually supports the other end side of the lower surface of each support plate from below. Stairs.   The communication support body includes a support member that supports each of the plurality of communication treads from below, and the plurality of communication treads arranged between the rising step unit and the upper floor. A pair of girder bodies, which are disposed so as to be opposed to each other between the unit and the upper floor, and on which the support member is fixed along the arrangement direction of the plurality of treads for communication, and a floor on the lower floor 4. The open according to claim 3, further comprising: a pair of girder support columns which are erected on a surface and support each of the end portions on the lower floor side of the pair of girder bodies from below. Stairs.   5. The open staircase according to claim 4, wherein each of the parent strut and the child strut is disposed on an inner side of an extension line of a region along both longitudinal edges of the communication step board.   The sub struts of the support plate that supports at least the final stage of each of the rising foot treads from below are arranged on an extension line along one longitudinal direction of the pair of beam bodies. The open stair according to claim 6, characterized in that   6. The open staircase according to claim 5, wherein the pair of girder bodies is formed of extruded aluminum or aluminum alloy.   The stair railing is provided, The open stair of any one of Claim 1 thru | or 8 characterized by the above-mentioned.

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