JPH11100986A - Temporarily set staircase - Google Patents

Abstract

PROBLEM TO BE SOLVED: To horizontally hold a tread regardless of a set angle, and facilitate disassembling and assembling by pivoting and connecting a link through a pivot part on upper and lower leg columns to hold a parallel state and constituting a temporarily set staircase. SOLUTION: A staircase body A is constituted so that a pivot part is provided on upper and lower leg columns 1 comprising steel-made pipe material to pivot and connect a link and right and left leg columns are connected with a connection rod at upper, middle and lower three points. A tread B is constituted so that a gauze is stretched on a frame body, a locking groove provided on the frame body is fitted to the pivot part of the leg column 1, and the non- slip member 8 of a thumbscrew and the like is inserted in the frame body of the link and the tread B to be fixed. A foot part 10 is rotatably attached to the lower end of the staircase body A, and a leg column joint is inserted in the leg column 1 to vertically connect the staircase body A. In addition, a fitting for handrail attaching 13 is attached to the leg column 1. Thus, the tread B is horizontally held regardless of the set angle of the staircase body A, and disassembling and assembling are easy.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は主として工事現場に
於いて、地下構造物と地上との間など上下階の間を行き
来するのに適用される仮設階段に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temporary staircase which is mainly used at a construction site to move between upper and lower floors such as between an underground structure and the ground.

【０００２】[0002]

【従来の技術】工事現場に於いては、上下階の間を行き
来するために仮設階段を設置することが必要になり、従
来では一般に鉄骨製の仮設階段が使用されていた。2. Description of the Related Art At a construction site, it is necessary to install temporary stairs to move between upper and lower floors. Conventionally, temporary stairs made of steel have been used.

【０００３】[0003]

【発明が解決しようとする課題】従来提供されている仮
設階段は、一般に上り下りし易い３８°前後の角度に設
置したときに踏み板が水平になるように設計されてお
り、また長さは一定で伸縮調整できない構成になってい
る。長さが一定の仮設階段であっても、仮設階段の設置
場所の階高にはばらつきがある場合には設置角度の大小
変更により階高のばらつきに対処できるが、設置角度を
変更すると踏み板の水平性が失われ危険である。The temporary stairs provided so far are generally designed such that the tread is horizontal when installed at an angle of about 38 °, which is generally easy to ascend and descend, and has a fixed length. It is configured so that it cannot be adjusted for expansion and contraction. Even if the temporary stairs have a fixed length, if the floor height of the temporary stairs installation location varies, the variation of the floor height can be dealt with by changing the installation angle. It is dangerous because horizontality is lost.

【０００４】また、仮設階段は通常鉄骨製で高重量であ
り、施工現場で簡単に組み立て解体できる構成のものが
望まれるが、このような構成の仮設階段はいまだ提供さ
れるに至っていない。The temporary staircase is usually made of steel and is heavy, and it is desired that the temporary staircase can be easily assembled and disassembled at a construction site. However, such a temporary staircase has not yet been provided.

【０００５】本発明は踏み板の水平性を保持した状態の
ままで設置角度を階高に合わせて自由に変更できると共
に組み立て解体が容易な仮設階段を提供することを目的
としてなされたものでる。An object of the present invention is to provide a temporary staircase in which the installation angle can be freely changed according to the floor height while the horizontality of the step board is maintained, and the assembly and disassembly is easy.

【０００６】[0006]

【課題を解決するための手段】本発明は、階段本体と該
階段本体に対し階段の上り下り方向に多段的に設置され
る脱着自在な多数枚の踏み板とを備え、階段本体は左右
２組の脚部と該脚部同士を上記踏み板の左右幅に相当す
る間隔を存して平行に連結する複数本の連結ロッドとか
ら構成され、上記脚部の各組は、上下一対の脚柱と該脚
柱を平行状態に枢止連結する複数本のリンクとから構成
されていて平行四辺形のリンク構造を有し且つ上脚柱の
組と下脚柱の組に於いてそれぞれ上記ロッドにより連結
されており、上記リンクは多段設置の踏み板の各段の取
り付け間隔に相当する間隔で並列され、これらリンクの
上下両端部の枢軸部は上下左右の脚柱の内端から内方へ
突出し各段のリンクごとに４本一組の係止突部を構成
し、一方踏み板は上記脚部間の間隔に略々相当する左右
幅を有する本体部と該本体部の左右の両側辺から階段の
下り方向に延出する左右側板部を備え、該左右側板部の
両側部に階下側から階上側に向けて凹入する係止溝がト
ータルで４個一組となるように形成され、踏み板は４個
一組の係止溝に於いて階段本体の各段のリンクの４個一
組の係止突部に対し掛け外し自在に取り付けることが出
来る構成になっていることを特徴とする仮設階段に係
る。According to the present invention, there is provided a staircase main body and a plurality of detachable treads which are installed in multiple stages in the ascending and descending directions of the staircase with respect to the staircase main body. And a plurality of connecting rods for connecting the legs in parallel with an interval corresponding to the left and right width of the tread plate, and each set of the legs is a pair of upper and lower legs. A plurality of links for pivotally connecting the pedestals in a parallel state, having a parallelogram link structure, and being connected by the rods in the upper pedestal set and the lower pedestal set, respectively. The links are arranged in parallel at intervals corresponding to the mounting intervals of each step of the multi-step footboard, and the pivots at the upper and lower ends of these links project inward from the inner ends of the upper, lower, left and right pillars, and Each link constitutes a set of four locking projections, while the footboard is A main body having a left and right width substantially equivalent to the interval between the legs, and a left and right side plate extending from both left and right sides of the main body in a descending direction of the stairs; Are formed so as to form a set of four locking grooves which are recessed from the floor toward the upper floor. The present invention relates to a temporary staircase, wherein the temporary staircase is configured to be detachably attached to a set of locking projections.

【０００７】[0007]

【発明の実施の形態】以下に本発明の一実施形態を添付
図面に基づき説明すると次の通りである。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the accompanying drawings.

【０００８】本発明仮設階段は鋼製の階段本体Ａ（図
１,２参照）と該階段本体Ａに対し取り外し可能に装着
される鋼製の踏み板Ｂ（図６参照）を備えている。The temporary staircase of the present invention includes a steel stair body A (see FIGS. 1 and 2) and a steel tread plate B (see FIG. 6) removably attached to the stair body A.

【０００９】図１は階段本体Ａを水平に倒した状態で示
す平面図、図２は同側面図であり、階段本体Ａは図１か
ら明らかなように左右２組の脚部１,１と該脚部１,１を
軸方向の両端部と中間部の都合３個所で連結する連結ロ
ッド２とから構成されている。連結ロッド２は少なくと
も２箇所にあればよく、例えば中間部は省略してもよ
い。FIG. 1 is a plan view showing the staircase main body A in a horizontal state, and FIG. 2 is a side view thereof. As is clear from FIG. It is composed of a connecting rod 2 for connecting the legs 1, 1 at three convenient positions at both ends in the axial direction and at an intermediate portion. It is sufficient that the connecting rod 2 is provided at at least two places, and for example, the intermediate part may be omitted.

【００１０】脚部１は、図２の側面図から明らかなよう
に、上,下脚柱１ａ,１ｂとこれら脚柱１ａ,１ｂを平行
状態に連結する多数本、例えば７本の平行配置のリンク
１ｃとから構成され、リンク１ｃの相互間には踏み板Ｂ
（図６参照）の設置間隔、例えば３００mm程度の間隔が
設けられている。脚柱１ａ,１ｂとしては、例えば鋼製
のパイプ材が用いられる。As is apparent from the side view of FIG. 2, the leg 1 has a large number of, for example, seven, parallel links connecting the upper and lower pillars 1a, 1b and the pillars 1a, 1b in a parallel state. 1c, and a step board B is provided between the links 1c.
(See FIG. 6), for example, an interval of about 300 mm is provided. As the pillars 1a and 1b, for example, a steel pipe material is used.

【００１１】図１及び図３（図１の３−３線に沿う断面
図）から明らかなように、２組の脚部１,１は上脚柱１
ａ,１ａの組及び下脚柱１ｂ,１ｂの組ごとに両端リンク
１ｃ１、１ｃ１及び中間リンク１ｃ２との３個所に於い
て上下一対の鋼製連結ロッド２,２によりそれぞれ連結
され、該ロッド２はこれらリンク１ｃ１,１ｃ１及び１
ｃ２を上下両端部に於いて上下脚柱１ａ,１ｂに対し枢
止連結する枢軸を兼用している。尚,図１,２ではリンク
を上下脚柱１ａ,１ｂの内側に配置した場合が示されて
いるが、外側に配置するようにしてもよい。As is clear from FIGS. 1 and 3 (a sectional view taken along line 3-3 in FIG. 1), the two sets of legs 1, 1
a, 1a and a pair of lower pillars 1b, 1b are connected by a pair of upper and lower steel connecting rods 2, 2 at three places including both end links 1c1, 1c1 and an intermediate link 1c2. These links 1c1, 1c1 and 1
The c2 also serves as a pivot for pivotally connecting the upper and lower legs 1a, 1b at the upper and lower ends. Although FIGS. 1 and 2 show the case where the links are arranged inside the upper and lower legs 1a and 1b, they may be arranged outside.

【００１２】リンク１ｃ,１ｃ１,１ｃ２の断面形状は特
に制限されないが、図２には３０〜５０mm程度の幅の鋼
製帯板状のものが示されている。The cross-sectional shapes of the links 1c, 1c1, 1c2 are not particularly limited, but FIG. 2 shows a steel strip having a width of about 30 to 50 mm.

【００１３】脚柱１,１の左右間隔は連結ロッド２の幅
止めフランジ２ａ,２ａ（図４参照）間の間隔に相当
し、例えば５００mm程度の間隔に設定されている。The distance between the left and right pillars 1, 1 corresponds to the distance between the width stopping flanges 2a, 2a (see FIG. 4) of the connecting rod 2, and is set, for example, to about 500 mm.

【００１４】両端及び中間のリンク１ｃ１,１ｃ１及び
１ｃ２を除く他のリンク１ｃの上下両端部は上下脚柱１
ａ,１ｂに対し枢軸部３により枢止連結されている。The upper and lower ends of the link 1c other than the both ends and the intermediate links 1c1, 1c1 and 1c2
a and 1b are pivotally connected to each other by a pivot 3.

【００１５】枢軸部３は図５の拡大図に示すように脚柱
１ａ,１ｂの内端より内方へ突出し、この突出部に内端
鍔部４ａ付の係止突部４が形成される。而して各段に於
いて左右のリンク１ｃ,１ｃはそれぞれ上下２箇所に係
止突部４,４を備え、各段当たり４個一組の係止突部４
が形成されることになる。As shown in the enlarged view of FIG. 5, the pivot 3 protrudes inward from the inner ends of the pillars 1a and 1b, and a locking projection 4 with an inner end flange 4a is formed on this projection. . In each step, the left and right links 1c, 1c are provided with locking projections 4 at upper and lower portions, respectively.
Is formed.

【００１６】両端及び中間のリンク１ｃ１,１ｃ１及び
１ｃ２に於いては上下一対の連結ロッド２,２が枢軸部
３並びに係止突部４を兼用し、該ロッド２の両端部には
鍔部４ａ１（図４参照）が形成されている。In each of the links 1c1, 1c1 and 1c2 at both ends and the middle, a pair of upper and lower connecting rods 2 also serve as a pivot 3 and a locking projection 4, and flanges 4a1 are provided at both ends of the rod 2. (See FIG. 4).

【００１７】図６に示すように、踏み板Ｂは平板状の本
体部５と該本体部５の各辺から階段の下り方向に突出す
る上下,左右の側板部６ａ,６ａ、６ｂ,６ｂとから構成
され、左右側板部６ｂ,６ｂには、両端部に階段の上り
下り方向を基準に下から上向きに凹入する係止溝７が形
成され、而して踏み板Ｂは全体で４個一組の係止溝７を
備えている。４個一組の係止溝７の各溝間の間隔は４個
一組の上記係止突部４の各突部部間の間隔に一致し、各
組ごとに該係止突部４に対し自由に係脱できるようにな
っている。As shown in FIG. 6, the step board B is composed of a flat plate-shaped main body 5 and upper and lower, left and right side plate parts 6a, 6a, 6b, 6b protruding from each side of the main body 5 in the descending direction of the stairs. The left and right side plate portions 6b, 6b are formed at both ends with locking grooves 7 which are recessed upward from below with reference to the ascending and descending directions of the stairs. Locking groove 7 is provided. The spacing between each set of four locking grooves 7 corresponds to the spacing between each set of four locking projections 4, and the set of locking projections 4 It can be freely disengaged.

【００１８】本体部１は長方形状で長辺側（上下の辺）
の長さは脚柱１,１間の間隔と略々等しいか或いはこれ
より若干小さく、図示の例では間隔５００mmに対し４８
０mm程度に設定した場合が示されている。一方短辺側
（左右の辺）の長さは脚部１の上下脚柱１ａ,１ｂの外
端間の間隔に略々等しく、図示の例では２８０mm程度の
間隔に設定した場合が示されている。The main body 1 is rectangular and has a long side (upper and lower sides).
Is approximately equal to or slightly smaller than the distance between the pillars 1 and 1;
The case where it is set to about 0 mm is shown. On the other hand, the length of the short side (left and right sides) is substantially equal to the interval between the outer ends of the upper and lower pillars 1a and 1b of the leg 1, and in the illustrated example, the interval is set to about 280mm. I have.

【００１９】上下,左右の側板部６ａ,６ａ、６ｂ,６ｂ
は踏み板Ｂの曲げ強度を強化するリブとして機能し、突
出幅は例えばリンク幅と同程度の３０〜５０mm程度あれ
ば充分である。また３０〜５０mm程度の突出幅があれ
ば、係止溝７として充分な深さのものを形成できる。Upper and lower, left and right side plate portions 6a, 6a, 6b, 6b
The rib functions as a rib for enhancing the bending strength of the tread plate B, and it is sufficient that the protrusion width is, for example, about 30 to 50 mm, which is about the same as the link width. If the projection width is about 30 to 50 mm, the locking groove 7 can be formed with a sufficient depth.

【００２０】上下,左右側板部６ａ,６ａ、６ｂ,６ｂを
枠状に連成しておけば高強度となり、本体部５としては
図６に示すように金網状のものを使用でき、踏み板Ｂの
軽量化が可能になる。If the upper and lower, left and right side plate portions 6a, 6a, 6b, 6b are connected in a frame shape, the strength becomes high. As the main body portion 5, a wire mesh shape can be used as shown in FIG. Can be reduced in weight.

【００２１】階段を組み立てるに際しては、図１,２に
示す状態で、図１に仮想線で示すように、踏み板Ｂを脚
部１,１間の間隔内に差し込み、取り付け対象のリンク
１ｃ,１ｃの階上側に位置させた後に４個一組の係止溝
７を上記リンク１ｃ,１ｃ側に備えた４個一組の係止突
部４に係止し、係止後、リンク１ｃに備えた抜け止め部
材８例えば蝶ねじを回動操作しその先端部を踏み板側板
部６ｂの挿通穴９に挿入することにより、一段の踏み板
Ｂの取り付けが完了する。抜け止め部材８はプッシュ式
であってもよい。When assembling the stairs, in the state shown in FIGS. 1 and 2, as shown by a virtual line in FIG. 1, the tread plate B is inserted into the space between the legs 1, 1, and the links 1 c, 1 c to be attached are attached. After being located on the upper floor, a set of four locking grooves 7 is locked to the set of four locking projections 4 provided on the link 1c, 1c side, and after locking, the set is provided on the link 1c. By rotating the retaining member 8, for example, a thumbscrew, and inserting the tip end thereof into the insertion hole 9 of the tread plate side plate portion 6 b, the attachment of the tread plate B is completed. The retaining member 8 may be of a push type.

【００２２】以下、同様にして各段のリンクの部分に踏
み板Ｂを取り付けて行くことにより本発明仮設階段が得
られる。図７に示すように本発明仮設階段を傾斜設置し
た状態では、踏み板Ｂの重量は係止溝７を係止突部４に
対し押し付ける方向にかかると共に踏み板側板部６ｂの
挿通穴９内に挿入された抜け止め部材８が踏み板Ｂの上
方への抜け止めとして機能するので、踏み板Ｂが階段本
体Ａから外れるという危険性は全くなくなり、階段本体
Ａに対し踏み板Ｂを簡単な操作で安定確実に取り付け固
定することができる。Hereinafter, the temporary stairs of the present invention can be obtained by attaching the tread plate B to the link portion of each step in the same manner. As shown in FIG. 7, when the temporary staircase of the present invention is installed at an angle, the weight of the tread plate B is applied in the direction of pressing the locking groove 7 against the locking projection 4 and is inserted into the insertion hole 9 of the tread plate side plate portion 6b. Since the provided retaining member 8 functions as a retainer for the upper part of the step board B, there is no danger that the step board B comes off the stair body A, and the step board B can be stably and reliably moved with respect to the stair body A by a simple operation. Can be mounted and fixed.

【００２３】図８は本発明仮設階段の傾斜設置状況を示
し、同図（イ）は３０°、（ロ）は４５°、（ハ）は６
０°に傾斜設置した状態をそれぞれ示し、このように傾
斜設置角度を変更することにより、工事の進行等により
階高の高さが変わってもこの階高の変更に簡単容易に対
処することができる。また傾斜設置角度を種々選択して
も踏み板Ｂは平行四辺形のリンク構造に基づき平行状態
を保持できる。FIGS. 8A and 8B show an inclined installation state of the temporary staircase of the present invention, wherein FIG. 8A is 30 °, FIG. 8B is 45 °, and FIG.
Each of the above shows a state where the floor is inclined at 0 °. By changing the inclination installation angle in this way, even if the height of the floor changes due to the progress of the construction, etc., it is possible to easily and easily cope with the change of the floor height. it can. Further, even if various inclination installation angles are selected, the tread plate B can maintain the parallel state based on the parallelogram link structure.

【００２４】傾斜設置状態に於いて、脚部１,１の接地
部の安定化を計るために、２組の上下脚柱１ａ,１ａ、
１ｂ,１ｂの接地部に対し足部１０を取り付けることが
できる。In order to stabilize the ground portion of the legs 1, 1 in the inclined installation state, two pairs of upper and lower legs 1a, 1a,
The foot 10 can be attached to the grounding portions 1b, 1b.

【００２５】足部１０は図９に示すように側面３角形状
の足本体１０ａと該足本体１０ａの上端から上方へ延出
する差し込み部１０ｂを備え、差し込み部１０ｂはスト
ッパ１０ｃの位置まで脚柱１ａ又は１ｂ内に下端から上
向きに差し込むことができるようになっている。差し込
み状態に於いてピン（図示せず）で抜け止めするため
に、差し込み状態に於いて連通するピン穴１１、１２が
差し込み部１０ｂと脚柱１ａ,１ｂ（図２参照）の下端
部とに形成されている。As shown in FIG. 9, the foot 10 has a triangular side leg body 10a and an insertion portion 10b extending upward from the upper end of the foot body 10a, and the insertion portion 10b extends to the position of the stopper 10c. It can be inserted upward from the lower end into the pillar 1a or 1b. Pin holes 11 and 12 communicating with each other in the inserted state are provided between the insertion portion 10b and the lower ends of the pillars 1a and 1b (see FIG. 2) in order to prevent the pins from being removed with the pins (not shown) in the inserted state. Is formed.

【００２６】設置時の傾斜に対応するために足本体１０
ａは差し込み部１０ｂに対し軸止めされ、軸止め部１０
ｄの中心軸線周りの方向に自由に回動できるようになっ
ている。In order to cope with the inclination at the time of installation, the foot body 10
a is fixed to the insertion portion 10b,
d can be freely rotated in the direction around the central axis.

【００２７】傾斜設置時に上脚柱１ａ,１ａに手摺り
（図示せず）を取り付け可能とするために、手摺りの取
り付け金具１３が、例えば上脚柱１ａ,１ａの両端部に
備えられている。In order to be able to attach a handrail (not shown) to the upper pillars 1a, 1a at the time of the inclined installation, handrail mounting brackets 13 are provided at both ends of the upper pillars 1a, 1a, for example. I have.

【００２８】仮設階段をあまり長くすると取り扱いに不
便であるので、定尺寸法例えば２１００mm程度の長さの
ものを、複数本例えば２本を継ぎ足して使用するような
構成にしてもよい。。If the temporary stairs are too long, it is inconvenient to handle them. Therefore, a configuration in which a plurality of, for example, two stylized ones having a length of about 2100 mm may be used. .

【００２９】この場合、脚柱１ａ,１ｂの軸方向の接続
には、足場組等に使用されている脚柱ジョイント１４
（図１参照）を適用できる。In this case, the connection of the pillars 1a and 1b in the axial direction is made by the pillar joints 14 used in a scaffolding assembly or the like.
(See FIG. 1) can be applied.

【００３０】仮設階段を解体する場合には、組立時と逆
の手順を取ればよい。解体後に於いては階段本体Ａは平
行四辺形のリンク構造に基づき折り畳むことができる。
折り畳み状態での持ち運びに便ならしめるために、脚部
の上脚柱１ａには提げ手１５が取り付けられている。When disassembling the temporary stairs, a procedure reverse to that for assembling may be used. After dismantling, the staircase body A can be folded based on a parallelogram link structure.
In order to facilitate carrying in a folded state, a hand 15 is attached to the upper pedestal 1a of the leg.

【００３１】[0031]

【発明の効果】本発明によれば、踏み板の水平状態を保
持した状態のままで設置角度を自由に変更でき、種々の
階高に適合させて使用することができる上に組み立て解
体が可能で搬入搬出に便利な仮設階段を提供できる。According to the present invention, the installation angle can be freely changed while the horizontal state of the tread plate is maintained, it can be used in accordance with various floor heights, and it can be assembled and disassembled. It is possible to provide temporary stairs that are convenient for loading and unloading.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の一実施形態を示す階段本体の平面図で
ある。FIG. 1 is a plan view of a staircase main body showing one embodiment of the present invention.

【図２】同、階段本体の側面図である。FIG. 2 is a side view of the staircase main body.

【図３】図１の３−３に沿う断面図である。FIG. 3 is a sectional view taken along line 3-3 in FIG. 1;

【図４】連結ロッドの端部の拡大断面図である。FIG. 4 is an enlarged sectional view of an end of a connecting rod.

【図５】リンクの枢軸部の拡大図である。FIG. 5 is an enlarged view of a pivot portion of a link.

【図６】踏み板の斜視図である。FIG. 6 is a perspective view of a tread plate.

【図７】階段の組立完成後の状況を示す斜視図である。FIG. 7 is a perspective view showing a state after completion of the assembly of the stairs.

【図８】階段の傾斜設置状況を設置角度を変えて示す側
面図である。FIG. 8 is a side view showing an inclined installation state of a stair at different installation angles.

【図９】足部の側面図である。FIG. 9 is a side view of a foot.

【符号の説明】[Explanation of symbols]

Ａ 階段本体 Ｂ 踏み板 １ 脚部 １ａ 上脚柱 １ｂ 下脚柱 １ｃ リンク ２ 連結ロッド ２ａ 幅止めフランジ ３ 枢軸部 ４ 係止突部 ４ａ 鍔部 ５ 踏み板の本体部 ６ａ 踏み板の上下側板部 ６ｂ 踏み板の左右側板部 ７ 係止溝 ８ 抜け止め部材 ９ 挿通穴 １０ 足部 １１ ピン穴 １２ ピン穴 １３ 手摺り取り付け金具 １４ 脚柱ジョイント １５ 提げ手 Reference Signs List A Stair body B Stepping board 1 Leg 1a Upper leg 1b Lower leg 1c Link 2 Connecting rod 2a Width stopper flange 3 Pivot 4 Locking projection 4a Flange 5 Tread plate main body 6a Tread plate upper and lower plate portions 6b Tread plate left and right Side plate 7 Locking groove 8 Retaining member 9 Insertion hole 10 Foot 11 Pin hole 12 Pin hole 13 Handrail mounting bracket 14 Pillar joint 15 Hanging hand

フロントページの続き (72)発明者 津中 慶次 大阪府大阪市西区南堀江２丁目４番８号 株式会社日本インダストリー製作所内 (72)発明者 東山 真澄 大阪府大阪市西区南堀江２丁目４番８号 株式会社日本インダストリー製作所内Continued on the front page (72) Inventor Keiji Tsunaka 2-4-8 Minamihorie, Nishi-ku, Osaka-shi, Osaka Inside Japan Industries Co., Ltd. (72) Masumi Higashiyama 2-4-2-8 Minamihorie, Nishi-ku, Osaka, Osaka No. Japan Industry Manufacturing Co., Ltd.

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】階段本体と該階段本体に対し階段の上り下
り方向に多段的に設置される脱着自在な多数枚の踏み板
とを備え、階段本体は左右２組の脚部と該脚部同士を上
記踏み板の左右幅に相当する間隔を存して平行に連結す
る複数本の連結ロッドとから構成され、上記脚部の各組
は、上下一対の脚柱と該脚柱を平行状態に枢止連結する
複数本のリンクとから構成されていて平行四辺形のリン
ク構造を有し且つ上脚柱の組と下脚柱の組に於いてそれ
ぞれ上記ロッドにより連結されており、上記リンクは多
段設置の踏み板の各段の取り付け間隔に相当する間隔で
並列され、これらリンクの上下両端部の枢軸部は上下左
右の脚柱の内端から内方へ突出し各段のリンクごとに４
本一組の係止突部を構成し、一方踏み板は上記脚部間の
間隔に略々相当する左右幅を有する本体部と該本体部の
左右の両側辺から階段の下り方向に延出する左右側板部
を備え、該左右側板部の両側部に階下側から階上側に向
けて凹入する係止溝がトータルで４個一組となるように
形成され、踏み板は４個一組の係止溝に於いて階段本体
の各段のリンクの４個一組の係止突部に対し掛け外し自
在に取り付けることが出来る構成になっていることを特
徴とする仮設階段。1. A staircase body comprising: a plurality of detachable treads which are installed in multiple stages in the ascending and descending directions of the stairs with respect to the staircase body; And a plurality of connecting rods that are connected in parallel with an interval corresponding to the left and right width of the tread plate, and each pair of the legs is configured to pivot the pair of upper and lower legs and the legs in parallel. It has a parallelogram link structure composed of a plurality of links to be stopped and connected, and is connected by the above-mentioned rods in each of a set of upper pedestal columns and a set of lower pedestal columns, and the above-mentioned link is installed in multiple stages The pivots at the upper and lower ends of these links protrude inward from the inner ends of the upper, lower, left and right pillars, and each of the links at each step has four links.
The set of locking projections constitutes a pair of locking projections, and the tread plate extends in the down direction of the stairs from the left and right sides of the main body having left and right widths substantially corresponding to the distance between the legs. A left and right plate portion is provided, and locking grooves that are recessed from the lower floor to the upper floor are formed on both sides of the left and right side plate portions so as to form a set of four in total. A temporary staircase characterized in that it can be detachably attached to a set of four locking projections of links of each step of a staircase body in a stop groove. 【請求項２】リンクがそれぞれ外側からの操作により内
方に向かって進退移動できる抜け止め部材を備え、一方
踏み板の両側板部に、階段本体への取り付け状態に於い
て、上記抜け止め部材の先端部が挿脱される挿通穴が形
成されていることを特徴とする請求項１記載の仮設階
段。2. A link member having a retaining member which can move inward and backward by an operation from the outside, and which is provided on both side plates of the one stepping plate when the retaining member is attached to the stair body. 2. The temporary staircase according to claim 1, wherein an insertion hole through which a tip portion is inserted / removed is formed. 【請求項３】連結ロッドがリンクの枢軸部並びに係止突
部を兼用していることを特徴とする請求項１又は２記載
の仮設階段。3. The temporary staircase according to claim 1, wherein the connecting rod also serves as a pivot portion and a locking projection of the link.