JP6749141B2

JP6749141B2 - Ladder device for ceiling storage

Info

Publication number: JP6749141B2
Application number: JP2016100961A
Authority: JP
Inventors: 克信藤川; 山本　勝雄; 勝雄山本; 俊介松浦
Original assignee: Daiken Co Ltd
Current assignee: Daiken Co Ltd
Priority date: 2016-05-20
Filing date: 2016-05-20
Publication date: 2020-09-02
Anticipated expiration: 2036-05-20
Also published as: JP2017206896A

Description

本発明は、折り畳まれて天井裏に収納され、伸展されて天井の開口部と床との間に掛け渡される梯子とを有する天井収納用梯子装置に関する。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ladder device for a ceiling storage, which has a ladder folded and stored in the back of the ceiling, extended, and extended between an opening of the ceiling and a floor.

従来、この種の天井収納用梯子装置としては、例えば図１１に示すように、天井１０１の開口部１０２に開口枠１０３が設けられ、開口枠１０３には、開口部１０２を開閉する蓋１０４がヒンジ１０５を介して回動自在に取り付けられている。蓋１０４には、折畳自在な梯子１０６が取付金具１０７を介して一体的に取り付けられている。また、天井１０１と蓋１０４との間に、屈曲自在なリンク１０８と、蓋１０４を閉方向Ｓへ付勢する引張りばね１０９とが設けられている。 Conventionally, as a ladder device for this type of ceiling storage, for example, as shown in FIG. 11, an opening frame 103 is provided in an opening portion 102 of a ceiling 101, and a lid 104 for opening and closing the opening portion 102 is provided in the opening frame 103. It is rotatably attached via a hinge 105. A foldable ladder 106 is integrally attached to the lid 104 via a mounting bracket 107. Further, between the ceiling 101 and the lid 104, a flexible link 108 and a tension spring 109 for urging the lid 104 in the closing direction S are provided.

これによると、蓋１０４を閉位置ＰＳから下向きに回動して開位置まで開き、梯子１０６を折畳状態から伸展することにより、梯子１０６が天井１０１の開口部１０２と床との間に掛け渡される。上記のように蓋１０４を閉位置ＰＳから開位置まで開く際、引張りばね１０９が次第に伸長する。 According to this, by rotating the lid 104 downward from the closed position PS to the open position and extending the ladder 106 from the folded state, the ladder 106 is hung between the opening 102 of the ceiling 101 and the floor. Passed. As described above, when the lid 104 is opened from the closed position PS to the open position, the tension spring 109 gradually extends.

梯子１０６を使用した後、梯子１０６を伸展状態から折り畳み、蓋１０４を開位置から閉位置ＰＳまで上向きに回動することにより、開口部１０２が蓋１０４で閉じられ、梯子１０６が折畳状態で天井裏に収納される。上記のように蓋１０４を開位置から閉位置ＰＳまで回動する際、引張りばね１０９が伸長状態から次第に短縮するため、引張りばね１０９のばね力によって蓋１０４が閉方向Ｓへ付勢され、これにより、使用者が蓋１０４を閉じるのに要する力を軽減することができる。 After using the ladder 106, the ladder 106 is folded from the extended state, and the lid 104 is pivoted upward from the open position to the closed position PS, whereby the opening 102 is closed by the lid 104 and the ladder 106 is in the folded state. It is stored behind the ceiling. When the lid 104 is rotated from the open position to the closed position PS as described above, the tension spring 109 is gradually shortened from the extended state, so that the lid 104 is biased in the closing direction S by the spring force of the tension spring 109. Thereby, the force required for the user to close the lid 104 can be reduced.

尚、上記のような天井収納用梯子装置１１０は例えば下記特許文献１に記載されている。 The above-described ceiling storage ladder device 110 is described in, for example, Patent Document 1 below.

特開２０００−４５６６８JP 2000-45668

しかしながら上記の従来形式では、天井収納用梯子装置１１０を天井１０１に取り付ける際、蓋１０４に梯子１０６を装着した状態で、蓋１０４を天井１０１に取り付けているため、梯子１０６を備えた蓋１０４の総重量が重くなり、天井１０１へ取り付ける際の施工性が悪いといった問題がある。 However, in the above-mentioned conventional type, when the ladder device 110 for storing the ceiling is attached to the ceiling 101, the lid 104 is attached to the ceiling 101 with the ladder 106 attached to the lid 104. There is a problem that the total weight becomes heavy and the workability when mounting on the ceiling 101 is poor.

本発明は、天井へ取り付ける際の施工性を向上させることができる天井収納用梯子装置を提供することを目的とする。 It is an object of the present invention to provide a ceiling storage ladder device that can improve workability when it is attached to a ceiling.

上記目的を達成するために、本第１発明は、天井に形成された開口部を開閉する蓋と、
折り畳まれて天井裏に収納され、伸展されて天井の開口部と床との間に掛け渡される梯子とを有する天井収納用梯子装置であって、
梯子の上端部が、第１取付部材を介して、天井側に上下回動自在に取り付けられ、
蓋が、第２取付部材を介して、天井側に上下回動自在に取り付けられ、
蓋に、梯子を下方から支持する支持部が設けられ、
支持部と梯子とは分離されており、
天井と蓋との間に、屈曲自在なリンクと、蓋を閉方向へ付勢する付勢部材とが設けられ、
リンクは、一端部が天井側に回動自在に連結された第１リンク部材と、一端部が蓋に回動自在に連結された第２リンク部材とを有し、
第１リンク部材の他端部と第２リンク部材の他端部とが相対回動自在に連結され、
付勢部材の一端部が天井側に設けられ、
付勢部材の他端部が第２リンク部材の一端部に連結され、
蓋を閉方向へ付勢する補助付勢部材が第１リンク部材と付勢部材との間に設けられているものである。 In order to achieve the above object, the first invention is a lid for opening and closing an opening formed in a ceiling,
A ladder device for a ceiling storage, comprising a ladder folded and stored in the back of the ceiling, extended, and extended between the opening of the ceiling and the floor.
The upper end of the ladder is vertically rotatably attached to the ceiling side via the first attachment member,
The lid is vertically rotatably attached to the ceiling side via the second attachment member,
The lid is provided with a support portion that supports the ladder from below ,
The support and the ladder are separated,
Between the ceiling and the lid, a bendable link and a biasing member that biases the lid in the closing direction are provided.
The link has a first link member whose one end is rotatably connected to the ceiling side, and a second link member whose one end is rotatably connected to the lid,
The other end of the first link member and the other end of the second link member are rotatably connected to each other,
One end of the biasing member is provided on the ceiling side,
The other end of the biasing member is connected to one end of the second link member,
An auxiliary urging member for urging the lid in the closing direction is provided between the first link member and the urging member.

これによると、梯子は、蓋に装着されておらず、蓋と分離されているため、梯子と蓋を個別に天井に取り付けることができる。これにより、蓋を取り付ける際、梯子の全重量が蓋にかかることはなく、蓋を容易に天井に取り付けることができるため、天井へ取り付ける際の施工性が向上する。 According to this, since the ladder is not attached to the lid and is separated from the lid, the ladder and the lid can be separately attached to the ceiling. Accordingly, when the lid is attached, the entire weight of the ladder is not applied to the lid, and the lid can be easily attached to the ceiling, so that the workability when attaching to the ceiling is improved.

また、梯子は第１取付部材を介して天井側に取り付けられ、蓋は第２取付部材を介して天井側に取り付けられているため、梯子の重量の一部は第１取付部材で受けられ、その分、第２取付部材にかかる重量が軽減されるので、第２取付部材を小型化することができる。 Since the ladder is attached to the ceiling side via the first attaching member and the lid is attached to the ceiling side via the second attaching member, a part of the weight of the ladder is received by the first attaching member, Since the weight of the second mounting member is reduced accordingly, the size of the second mounting member can be reduced.

また、蓋を閉位置から開く際、付勢部材と補助付勢部材とが蓋を閉方向へ付勢しているため、蓋にかかる梯子の重量によって蓋が急激に開いてしまうのを防止することができる。 Further, when the lid is opened from the closed position, the biasing member and the auxiliary biasing member bias the lid in the closing direction, so that the lid is prevented from opening suddenly due to the weight of the ladder on the lid. be able to.

蓋を閉位置から下向きに回動して開位置まで開き、梯子を折畳状態から伸展することにより、梯子が天井の開口部と床との間に掛け渡される。
本第２発明における天井収納用梯子装置は、第１リンク部材は第２リンク部材よりも短く、
付勢部材は引張りばねを有し、
補助付勢部材は補助引張りばねを有し、
補助引張りばねの引張力が引張りばねの引張力よりも小さく、
引張りばねの伸縮方向と補助引張りばねの伸縮方向とが交差しており、
補助引張りばねは蓋の閉位置と最も開いた開位置との間の所定位置において最も伸長し、
蓋が閉位置から下向きに回動して開位置まで開く際、引張りばねが次第に伸長するとともに、補助引張りばねが、閉位置から所定位置までの第１の範囲において次第に伸長し、所定位置から開位置までの第２の範囲において次第に短縮するものである。 By rotating the lid downward from the closed position to the open position and extending the ladder from the folded state, the ladder is suspended between the opening in the ceiling and the floor.
In the ladder device for ceiling storage according to the second aspect of the present invention, the first link member is shorter than the second link member,
The biasing member has a tension spring,
The auxiliary biasing member has an auxiliary tension spring,
The tension of the auxiliary tension spring is less than the tension of the tension spring,
The expansion and contraction direction of the tension spring intersects with the expansion and contraction direction of the auxiliary tension spring,
The auxiliary tension spring is most extended at a predetermined position between the closed position and the most open position of the lid,
When the lid pivots downward from the closed position and opens to the open position, the tension spring gradually expands, and the auxiliary tension spring gradually expands in the first range from the closed position to the predetermined position and opens from the predetermined position. It is gradually shortened in the second range up to the position.

これによると、使用者が蓋を閉位置から下向きに回動させて開位置まで開く際、引張りばねが次第に伸長するとともに、補助引張りばねが、第１の範囲において次第に伸長し、所定位置において最も伸長した後、第２の範囲において次第に短縮する。ここで、第２の範囲においては、引張りばねが最も伸長した状態にまで引き伸ばされるが、その反面、補助引張りばねが次第に短縮するため、使用者が蓋を開位置まで開くのに要する力の増大を、抑制することができる。 According to this, when the user pivots the lid downward from the closed position to open it to the open position, the tension spring gradually expands, and the auxiliary tension spring gradually expands in the first range, and becomes the most at the predetermined position. After extension, it is gradually shortened in the second range. Here, in the second range, the tension spring is extended to the most extended state, but on the other hand, the auxiliary tension spring is gradually shortened, so that the force required for the user to open the lid to the open position increases. Can be suppressed.

その後、使用者が蓋を開位置から閉位置まで上向きに回動させて開口部を閉じる際、伸長した引張りばねが次第に短縮するとともに、補助引張りばねが、第２の範囲において次第に伸長し、所定位置において最も伸長した後、第１の範囲において次第に短縮する。ここで、第２の範囲においては、引張りばねが最も伸長した状態から次第に短縮するため、引張りばねのみで蓋を閉方向へ付勢するための十分な付勢力が得られる。 Thereafter, when the user rotates the lid upward from the open position to the closed position to close the opening, the extended tension spring gradually shortens, and the auxiliary tension spring gradually extends in the second range to a predetermined value. It is most elongated in position and then gradually shortened in the first range. Here, in the second range, the tension spring gradually shortens from the most extended state, so that sufficient tension force for biasing the lid in the closing direction can be obtained only by the tension spring.

しかしながら、その後の第１の範囲においては、引張りばねがさらに短縮するため、引張りばねのみでは、蓋を閉方向へ付勢するための付勢力が不足する虞があるが、その反面、補助引張りばねが伸長した状態から次第に短縮することによって、蓋を閉方向へ付勢するための付勢力が補われる。これにより、蓋を開位置から閉位置まで上向きに回動させて開口部を閉じる際に要する使用者の持上力が軽減される。 However, in the subsequent first range, since the tension spring is further shortened, the tension spring alone may be insufficient in the biasing force for biasing the lid in the closing direction. The urging force for urging the lid in the closing direction is supplemented by gradually shortening from the extended state. As a result, the lifting force of the user required to rotate the lid upward from the open position to the closed position to close the opening is reduced.

また、引張りばねと補助引張りばねとを用いて蓋を閉方向へ付勢しているため、引張りばねのばね力を低減して引張りばねを小型軽量化することができる。
本第３発明における天井収納用梯子装置は、付勢部材は引張りばねのばね力を調節する調節部材を有するものである。 Further, since the lid is biased in the closing direction by using the tension spring and the auxiliary tension spring, the spring force of the tension spring can be reduced and the tension spring can be reduced in size and weight.
Ceiling for housing ladder device according to the third invention, the biasing member is to have the adjustment member for adjusting the spring force of the tension spring.

これによると、調節部材で引張りばねのばね力を調節することにより、使用者が蓋を開閉するのに要する力を調節することができる。 According to this, the force required for the user to open and close the lid can be adjusted by adjusting the spring force of the tension spring with the adjusting member.

以上のように本発明によると、梯子は、蓋に装着されておらず、蓋と分離されているため、梯子と蓋を個別に天井に取り付けることができる。これにより、蓋を取り付ける際、梯子の全重量が蓋にかかることはなく、蓋を容易に天井に取り付けることができるため、天井へ取り付ける際の施工性が向上する。また、梯子は第１取付部材を介して天井側に取り付けられ、蓋は第２取付部材を介して天井側に取り付けられているため、梯子の重量の一部は第１取付部材で受けられ、その分、第２取付部材にかかる重量が軽減されるので、第２取付部材を小型化することができる。また、蓋を閉位置から開く際、付勢部材と補助付勢部材とが蓋を閉方向へ付勢しているため、蓋にかかる梯子の重量によって蓋が急激に開いてしまうのを防止することができる。 As described above, according to the present invention, since the ladder is not attached to the lid and is separated from the lid, the ladder and the lid can be individually attached to the ceiling. Accordingly, when the lid is attached, the entire weight of the ladder is not applied to the lid, and the lid can be easily attached to the ceiling, so that the workability when attaching to the ceiling is improved. Since the ladder is attached to the ceiling side via the first attaching member and the lid is attached to the ceiling side via the second attaching member, a part of the weight of the ladder is received by the first attaching member, Since the weight of the second mounting member is reduced accordingly, the size of the second mounting member can be reduced. Further, when the lid is opened from the closed position, the biasing member and the auxiliary biasing member bias the lid in the closing direction, so that the lid is prevented from opening suddenly due to the weight of the ladder on the lid. be able to.

さらに、使用者が蓋を開位置から閉位置まで上向きに回動させて開口部を閉じる際、第１の範囲においては、引張りばねのみでは、蓋を閉方向へ付勢するための付勢力が不足する虞があるが、補助引張りばねが最も伸長した状態から次第に短縮することによって、蓋を閉方向へ付勢するための付勢力が補われる。これにより、蓋を開位置から閉位置まで上向きに回動させて開口部を閉じる際に要する使用者の力が軽減される。 Further, when the user turns the lid upward from the open position to the closed position to close the opening, in the first range, the tension spring alone provides an urging force for urging the lid in the closing direction. Although there may be a shortage, the biasing force for biasing the lid in the closing direction is supplemented by gradually shortening the auxiliary tension spring from the most extended state. This reduces the user's force required to rotate the lid upward from the open position to the closed position to close the opening.

また、調節部材で引張りばねのばね力を調節することにより、使用者が蓋を開閉するのに要する力を調節することができる。 Also, by adjusting the spring force of the tension spring with the adjusting member, the force required for the user to open and close the lid can be adjusted.

本発明の実施の形態における天井収納用梯子装置の一部切欠き側面図であり、蓋を開位置まで開いて梯子を伸展した状態を示す。FIG. 3 is a partially cutaway side view of the ladder device for ceiling storage according to the embodiment of the present invention, showing a state where the lid is opened to the open position and the ladder is extended. 図１におけるＸ−Ｘ矢視図である。It is a XX arrow line view in FIG. 同、天井収納用梯子装置の梯子と天井の固定枠との取付部分の拡大側面図である。FIG. 3 is an enlarged side view of the mounting portion between the ladder of the ceiling storage ladder device and the fixed frame of the ceiling. 図３におけるＸ−Ｘ矢視図である。It is a XX arrow line view in FIG. 同、天井収納用梯子装置の蓋と天井の固定枠との取付部分の拡大側面図であり、蓋を開位置まで開いたときの状態を示す。FIG. 3 is an enlarged side view of the attachment portion between the lid of the ceiling storage ladder device and the fixed frame of the ceiling, showing the state when the lid is opened to the open position. 同、天井収納用梯子装置の一部切欠き側面図であり、梯子を折り畳んで蓋を閉位置まで閉じた状態を示す。FIG. 3 is a partially cutaway side view of the same ceiling storage ladder device, showing a state in which the ladder is folded and the lid is closed to the closed position. 同、天井収納用梯子装置の蓋と天井の固定枠との取付部分の拡大側面図であり、蓋を閉位置まで閉じたときの状態を示す。FIG. 3 is an enlarged side view of the mounting portion between the lid of the ceiling storage ladder device and the fixed frame of the ceiling, showing the state when the lid is closed to the closed position. 同、天井収納用梯子装置の一部切欠き側面図であり、梯子を折り畳んだままで蓋を所定位置まで開いた状態を示す。FIG. 4 is a partially cutaway side view of the same ladder device for ceiling storage, showing a state in which the lid is opened to a predetermined position while the ladder is folded. 同、天井収納用梯子装置の蓋と天井の固定枠との取付部分の拡大側面図であり、蓋を所定位置まで開いた状態を示す。FIG. 3 is an enlarged side view of the mounting portion of the lid of the ceiling storage ladder device and the fixed frame of the ceiling, showing the state where the lid is opened to a predetermined position. 同、天井収納用梯子装置の一部切欠き側面図であり、梯子を折り畳んだままで、蓋を開位置まで開いた状態を示す。FIG. 3 is a partially cutaway side view of the ceiling storage ladder device, showing a state in which the lid is opened to the open position while the ladder is folded. 従来の天井収納用梯子装置の側面図である。It is a side view of the conventional ladder device for ceiling storage.

以下、本発明における実施の形態を、図面を参照して説明する。
（第１の実施の形態）
図１，図２に示すように、１は天井２に設けられた天井収納用梯子装置である。以下、天井収納用梯子装置１について説明する。 Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
As shown in FIG. 1 and FIG. 2, reference numeral 1 denotes a ceiling storage ladder device provided on a ceiling 2. The ceiling storage ladder device 1 will be described below.

天井２には四角形の開口部３が形成され、天井収納用梯子装置１は、開口部３を開閉する蓋５と、図６に示すように折り畳まれて天井裏６に収納され、図１に示すように伸展されて天井２の開口部３と床７との間に掛け渡される梯子９とを有している。 A square opening 3 is formed in the ceiling 2, and the ladder device 1 for storing the ceiling is covered with a lid 5 that opens and closes the opening 3, and is folded and stored in the ceiling back 6 as shown in FIG. As shown, it has a ladder 9 extended between the opening 3 of the ceiling 2 and the floor 7.

図１，図２に示すように、天井２の裏側には、開口部３の周縁を取り囲むように、四角枠状の取付用野縁１１（固定部材の一例）が設けられている。
梯子９は、左右一対の側桁１３と、両側桁１３間に設けられた複数の踏み板１４と、手摺１５とを有し、長さ方向において梯子部材１６ａ，１６ｂ，１６ｃに分割されており、これら梯子部材１６ａ，１６ｂ，１６ｃは屈伸自在に連結されている。図１〜図４に示すように、梯子９の上部の梯子部材１６ａの上端部は、左右一対の第１ヒンジ部材１７（第１取付部材の一例）を介して、取付用野縁１１（天井側の一例）に上下回動自在に取り付けられている。 As shown in FIGS. 1 and 2, a rectangular frame-shaped mounting field edge 11 (an example of a fixing member) is provided on the back side of the ceiling 2 so as to surround the peripheral edge of the opening 3.
The ladder 9 has a pair of left and right side girders 13, a plurality of step plates 14 provided between the side girders 13, and a handrail 15, and is divided into ladder members 16a, 16b, 16c in the length direction, These ladder members 16a, 16b, 16c are flexibly connected. As shown in FIGS. 1 to 4, the upper end portion of the ladder member 16a on the upper portion of the ladder 9 has a pair of left and right first hinge members 17 (an example of a first mounting member), and a mounting edge 11 (ceiling). It is attached rotatably up and down.

第１ヒンジ部材１７は、上部の梯子部材１６ａの側桁１３の上端部に設けられた梯子側ブラケット１８と、取付用野縁１１に設けられた固定側ブラケット１９と、これら梯子側ブラケット１８と固定側ブラケット１９とを連結する左右方向のヒンジピン２０とを有している。梯子側ブラケット１８は、固定側ブラケット１９に対して、ヒンジピン２０を中心に回動自在である。 The first hinge member 17 includes a ladder bracket 18 provided on the upper end of the side girder 13 of the upper ladder member 16a, a fixed bracket 19 provided on the mounting edge 11, and these ladder brackets 18. It has a hinge pin 20 in the left-right direction that connects the fixed bracket 19. The ladder bracket 18 is rotatable about the hinge pin 20 with respect to the fixed bracket 19.

図３〜図５に示すように、蓋５は、四角形状の内枠２１と、内枠２１内に設けられた四角板状の蓋部材２２とを有している。また、図５に示すように、取付用野縁１１は天井側の一例として四角形状の外枠５５を内周部に備えており、取付用野縁１１と外枠５５とは天井側に固定された固定部材である。蓋５は、第２ヒンジ部材２３（第２取付部材の一例）を介して、外枠５５に上下回動自在に取り付けられている。第２ヒンジ部材２３は、蓋５の一端部に設けられた蓋側ヒンジ４８と、外枠５５に設けられた固定側ヒンジ４９とを有している。 As shown in FIGS. 3 to 5, the lid 5 has a rectangular inner frame 21 and a rectangular plate-shaped lid member 22 provided in the inner frame 21. Further, as shown in FIG. 5, the mounting edge 11 is provided with a quadrangular outer frame 55 on the inner peripheral portion as an example of the ceiling side, and the mounting edge 11 and the outer frame 55 are fixed to the ceiling side. It is a fixed member. The lid 5 is vertically rotatably attached to the outer frame 55 via the second hinge member 23 (an example of a second attachment member). The second hinge member 23 has a lid-side hinge 48 provided on one end of the lid 5 and a fixed-side hinge 49 provided on the outer frame 55.

蓋側ヒンジ４８は、蓋５の内枠２１の一辺から相手方の固定側ヒンジ４９に向って突出している突起部５２および半円弧状の周胴部５３と、これら突起部５２と周胴部５３とで囲まれた内部空間５４とを有している。尚、内枠２１と蓋側ヒンジ４８とは例えばアルミ等の金属からなる一体成型品である。 The lid-side hinge 48 is surrounded by the protrusion 52 and the semi-arcuate peripheral body 53 protruding from one side of the inner frame 21 of the lid 5 toward the counterpart fixed-side hinge 49, and the protrusion 52 and the peripheral body 53. And an internal space 54. The inner frame 21 and the lid-side hinge 48 are integrally molded products made of metal such as aluminum.

また、固定側ヒンジ４９は、外枠５５の一辺下部から内部空間５４内に突入する突入部５６と、周胴部５３を外周側から受ける円弧状の受け部５７とを有している。尚、突入部５６は上方に窪んだ段付部５９を有し、突起部５２の先端が下方から段付部５９に受け止められる。 Further, the fixed-side hinge 49 has a protruding portion 56 that protrudes into the inner space 54 from a lower portion of one side of the outer frame 55, and an arcuate receiving portion 57 that receives the peripheral body portion 53 from the outer peripheral side. The protrusion 56 has a stepped portion 59 that is recessed upward, and the tip of the protrusion 52 is received by the stepped portion 59 from below.

尚、周胴部５３は後述する引張りコイルばね３８のばね力（引張り力）によって受け部５７に押し当てられ、これにより、蓋側ヒンジ４８が固定側ヒンジ４９から外れてしまうのを防止することができる。また、固定側ヒンジ４９と外枠５５とは例えばアルミ等の金属からなる一体成型品である。 The peripheral body portion 53 is pressed against the receiving portion 57 by the spring force (pulling force) of the tension coil spring 38, which will be described later, thereby preventing the lid-side hinge 48 from coming off the fixed-side hinge 49. .. The fixed hinge 49 and the outer frame 55 are integrally molded products made of metal such as aluminum.

図１，図２に示すように、蓋５は、裏側に、蓋５の幅方向（左右方向）に長い補強部材２５を有している。補強部材２５には、梯子９の両側桁１３を下方から支持する左右一対の支持部２６が設けられている。 As shown in FIGS. 1 and 2, the lid 5 has a reinforcing member 25 that is long in the width direction (left-right direction) of the lid 5 on the back side. The reinforcing member 25 is provided with a pair of left and right support portions 26 that support both side girders 13 of the ladder 9 from below.

天井２と蓋５との間には、屈曲自在な左右一対のリンク２９と、蓋５を閉方向Ｓへ付勢する左右一対の付勢部材３０とが設けられている。また、リンク２９と付勢部材３０との間には、蓋５を閉方向Ｓへ付勢する左右一対の補助付勢部材３１が設けられている。 Between the ceiling 2 and the lid 5, a pair of bendable left and right links 29 and a pair of left and right biasing members 30 that bias the lid 5 in the closing direction S are provided. Further, between the link 29 and the biasing member 30, a pair of left and right auxiliary biasing members 31 that bias the lid 5 in the closing direction S are provided.

リンク２９は、一端部が天井２の取付用野縁１１（天井側の一例）に回動自在に連結された第１リンク部材３４と、一端部が蓋５の補強部材２５に回動自在に連結された第２リンク部材３５とを有している。これら第１リンク部材３４の他端部と第２リンク部材３５の他端部とが相対回動自在に連結されている。尚、第１リンク部材３４の長さは第２リンク部材３５の長さよりも短い。 The link 29 has a first link member 34, one end of which is rotatably connected to the mounting edge 11 (an example of the ceiling side) of the ceiling 2, and one end of which is rotatably connected to the reinforcing member 25 of the lid 5. It has the 2nd link member 35 connected. The other end of the first link member 34 and the other end of the second link member 35 are connected so as to be rotatable relative to each other. The length of the first link member 34 is shorter than the length of the second link member 35.

付勢部材３０は、引張りコイルばね３８と、引張りコイルばね３８のばね力（引張り力）を調節するターンバックル３９（調節部材の一例）とを有している。天井２の取付用野縁１１には左右一対の係止部材４２（フック）が備えられ、引張りコイルばね３８の一端部が係止部材４２に係止されて（引っ掛けられて）いる。また、引張りコイルばね３８の他端部はターンバックル３９の一端部に係合し、ターンバックル３９の他端部が第２リンク部材３５の一端部に連結されている。 The biasing member 30 includes a tension coil spring 38 and a turnbuckle 39 (an example of an adjustment member) that adjusts the spring force (tensile force) of the tension coil spring 38. The mounting field edge 11 of the ceiling 2 is provided with a pair of left and right locking members 42 (hooks), and one end of the tension coil spring 38 is locked (hooked) by the locking member 42. The other end of the tension coil spring 38 engages with one end of the turnbuckle 39, and the other end of the turnbuckle 39 is connected to one end of the second link member 35.

補助付勢部材３１は、補助引張りコイルばね４４と、接続金具４５とを有している。補助引張りコイルばね４４は第１リンク部材３４と付勢部材３０との間に設けられている。すなわち、補助引張りコイルばね４４の一端部が接続金具４５を介して第１リンク部材３４に接続され、補助引張りコイルばね４４の他端部がターンバックル３９の一端部に係合している。 The auxiliary biasing member 31 has an auxiliary tension coil spring 44 and a connection fitting 45. The auxiliary tension coil spring 44 is provided between the first link member 34 and the biasing member 30. That is, one end of the auxiliary tension coil spring 44 is connected to the first link member 34 via the connection fitting 45, and the other end of the auxiliary tension coil spring 44 is engaged with one end of the turnbuckle 39.

補助引張りコイルばね４４のコイル中心径は引張りコイルばね３８のコイル中心径よりも小さく、補助引張りコイルばね４４の線径は引張りコイルばね３８の線径よりも細く、補助引張りコイルばね４４の有効巻数は引張りコイルばね３８の有効巻数よりも多く、補助引張りコイルばね４４のばね定数は引張りコイルばね３８のばね定数よりも小さい。 The coil center diameter of the auxiliary tension coil spring 44 is smaller than the coil center diameter of the tension coil spring 38, the wire diameter of the auxiliary tension coil spring 44 is smaller than the wire diameter of the tension coil spring 38, and the effective number of turns of the auxiliary tension coil spring 44 is small. Is larger than the effective number of turns of the tension coil spring 38, and the spring constant of the auxiliary tension coil spring 44 is smaller than the spring constant of the tension coil spring 38.

尚、補助引張りコイルばね４４は引張力が引張りコイルばね３８よりも小さく、このような引張力の大小関係が保たれるのであれば、上記の両コイルばね３８，４４についてのコイル中心径の大小関係、線径の太細関係、有効巻数の多少関係、ばね定数の大小関係は、上記に限定されるものではなく、逆の関係であってもよい。 Incidentally, the auxiliary tension coil spring 44 has a smaller tensile force than the tension coil spring 38, and if the magnitude relation of such tension forces is maintained, the coil center diameters of the above coil springs 38 and 44 are large or small. The relationship, the relationship of the diameter of the wire, the relationship of the number of effective windings, and the relationship of the magnitude of the spring constant are not limited to the above, and may be the opposite relationships.

図６に示すように蓋５が天井２の開口部３を閉じる位置を閉位置ＰＳとし、図１，図１０に示すように蓋５が最も開いた位置を開位置ＰＯとすると、補助引張りコイルばね４４は閉位置ＰＳと開位置ＰＯとの間に設定された所定位置Ａ（図８参照）において最も伸長するように構成されている。 When the lid 5 closes the opening 3 of the ceiling 2 as the closed position PS as shown in FIG. 6 and the lid 5 most open position as the open position PO as shown in FIGS. 1 and 10, the auxiliary tension coil The spring 44 is configured to extend most at a predetermined position A (see FIG. 8) set between the closed position PS and the open position PO.

尚、例えば、図６に示す閉位置ＰＳにおける引張りコイルばね３８の長さおよび補助引張りコイルばね４４の長さをそれぞれ１とすると、図８に示す所定位置Ａにおける引張りコイルばね３８の長さ（伸び率）は約１．３となり、補助引張りコイルばね４４の長さ（伸び率）は約１．７となる。また、図１，図１０に示す開位置ＰＯにおける引張りコイルばね３８の長さ（伸び率）は約１．４となり、補助引張りコイルばね４４の長さ（伸び率）は約１．４となる。 For example, assuming that the length of the tension coil spring 38 and the length of the auxiliary tension coil spring 44 at the closed position PS shown in FIG. 6 are 1, respectively, the length of the tension coil spring 38 at the predetermined position A shown in FIG. 8 ( The elongation rate is about 1.3, and the length (elongation rate) of the auxiliary tension coil spring 44 is about 1.7. Further, the length (elongation rate) of the tension coil spring 38 at the open position PO shown in FIGS. 1 and 10 is about 1.4, and the length (elongation rate) of the auxiliary tension coil spring 44 is about 1.4. ..

また、図８に示すように、閉位置ＰＳと所定位置Ａとの間を第１の範囲Ｂとし、所定位置Ａと開位置ＰＯとの間を第２の範囲Ｃとする。蓋５には、蓋５を閉位置ＰＳにロックするためのロック装置６２が設けられている。 Further, as shown in FIG. 8, a first range B is defined between the closed position PS and the predetermined position A, and a second range C is defined between the predetermined position A and the open position PO. The lid 5 is provided with a lock device 62 for locking the lid 5 in the closed position PS.

以下、上記構成における作用を説明する。
梯子９は、蓋５に装着されておらず、蓋５と分離されているため、梯子９と蓋５を個別に天井２の取付用野縁１１に取り付けることができる。これにより、蓋５を取り付ける際、梯子９の全重量が蓋５にかかることはなく、蓋５を容易に取付用野縁１１に取り付けることができるため、取り付けの施工性が向上する。 The operation of the above configuration will be described below.
Since the ladder 9 is not attached to the lid 5 and is separated from the lid 5, the ladder 9 and the lid 5 can be individually attached to the attachment field edge 11 of the ceiling 2. Accordingly, when the lid 5 is attached, the entire weight of the ladder 9 is not applied to the lid 5, and the lid 5 can be easily attached to the attachment field edge 11, so that the installation workability is improved.

また、図１〜図４に示すように梯子９は第１ヒンジ部材１７を介して天井２の取付用野縁１１に取り付けられ、図５に示すように蓋５は第２ヒンジ部材２３を介して天井２の取付用野縁１１に取り付けられているため、梯子９の重量の一部は第１ヒンジ部材１７で受けられ、その分、第２ヒンジ部材２３にかかる重量が軽減されるので、第２ヒンジ部材２３を小型化することができ、図５で示すように強度が低いアルミ成型品からなる第２ヒンジ部材２３を利用することができる。 Further, as shown in FIGS. 1 to 4, the ladder 9 is attached to the mounting edge 11 of the ceiling 2 via the first hinge member 17, and the lid 5 is attached via the second hinge member 23 as shown in FIG. Since the ladder 9 is attached to the mounting edge 11 of the ceiling 2, a part of the weight of the ladder 9 is received by the first hinge member 17, and the weight applied to the second hinge member 23 is reduced accordingly. The second hinge member 23 can be downsized, and the second hinge member 23 made of an aluminum molded product having low strength can be used as shown in FIG.

また、ロック装置６２を解除して、蓋５を閉位置ＰＳ（図６参照）から開く際、引張りコイルばね３８と補助引張りコイルばね４４とが蓋５を閉方向Ｓへ付勢しているため、蓋５にかかる梯子９の重量によって蓋５が急激に下方へ回動して開いてしまうのを防止することができる。 Further, when the lock device 62 is released and the lid 5 is opened from the closed position PS (see FIG. 6), the tension coil spring 38 and the auxiliary tension coil spring 44 urge the lid 5 in the closing direction S. It is possible to prevent the lid 5 from rapidly rotating downward and opening due to the weight of the ladder 9 on the lid 5.

蓋５を閉位置ＰＳ（図６参照）から下向きに回動して開位置ＰＯ（図１０参照）まで開き、図１，図２に示すように、梯子９を折畳状態から伸展することにより、梯子９が天井２の開口部３と床７との間に掛け渡される。 By rotating the lid 5 downward from the closed position PS (see FIG. 6) to the open position PO (see FIG. 10), the ladder 9 is extended from the folded state as shown in FIGS. 1 and 2. A ladder 9 is bridged between the opening 3 of the ceiling 2 and the floor 7.

使用者が蓋５を閉位置ＰＳ（図６参照）から下向きに回動させて開位置ＰＯ（図１０参照）まで開く際、引張りコイルばね３８が次第に伸長するとともに、補助引張りコイルばね４４が、第１の範囲Ｂにおいて次第に伸長し、図８に示すように、所定位置Ａにおいて最も伸長した後、第２の範囲Ｃにおいて次第に短縮する。ここで、第２の範囲Ｃにおいては、引張りコイルばね３８が最も伸長した状態にまで引き伸ばされるが、その反面、補助引張りコイルばね４４が最も伸長した状態から次第に短縮するため、使用者が蓋５を開位置ＰＯまで開くのに要する力の増大を、抑制することができる。 When the user rotates the lid 5 downward from the closed position PS (see FIG. 6) to open it to the open position PO (see FIG. 10), the tension coil spring 38 gradually expands and the auxiliary tension coil spring 44 is It gradually expands in the first range B, and as shown in FIG. 8, after it expands most at the predetermined position A, it gradually contracts in the second range C. Here, in the second range C, the tension coil spring 38 is stretched to the most stretched state, but on the other hand, the auxiliary tension coil spring 44 gradually shortens from the most stretched state, so that the user can use the lid 5 It is possible to suppress an increase in the force required to open the to the open position PO.

梯子９を伸展して使用した後、使用者が、図１０に示すように梯子９を折り畳み、蓋５を開位置ＰＯから閉位置ＰＳまで上向きに回動させて開口部３を閉じる際、伸長した引張りコイルばね３８が次第に短縮するとともに、補助引張りコイルばね４４が、第２の範囲Ｃにおいて次第に伸長し、図８に示すように所定位置Ａにおいて最も伸長した後、第１の範囲Ｂにおいて次第に短縮する。ここで、第２の範囲Ｃにおいては、引張りコイルばね３８が最も伸長した状態から次第に短縮するため、引張りコイルばね３８のみで蓋５を閉方向Ｓへ付勢するための十分な付勢力が得られる。 After the ladder 9 is extended and used, when the user folds the ladder 9 as shown in FIG. 10 and rotates the lid 5 upward from the open position PO to the closed position PS to close the opening part 3, the user extends it. The tension coil spring 38 is gradually shortened, and the auxiliary tension coil spring 44 is gradually extended in the second range C and is extended most in the predetermined position A as shown in FIG. Shorten. Here, in the second range C, since the tension coil spring 38 gradually shortens from the most extended state, a sufficient biasing force for biasing the lid 5 in the closing direction S is obtained only by the tension coil spring 38. To be

しかしながら、その後の第１の範囲Ｂにおいては、引張りコイルばね３８がさらに短縮して、引張りコイルばね３８の引張力がさらに低減するため、引張りコイルばね３８のみでは、蓋５を閉方向Ｓへ付勢するための付勢力が不足する虞があるが、その反面、補助引張りコイルばね４４が最も伸長した状態から次第に短縮することによって、蓋５を閉方向Ｓへ付勢するための付勢力が補われる。これにより、蓋５を開位置ＰＯから閉位置ＰＳまで上向きに回動させて開口部３を閉じる際に要する使用者の持上力が軽減される。 However, in the subsequent first range B, the tension coil spring 38 is further shortened and the tension force of the tension coil spring 38 is further reduced. Therefore, with only the tension coil spring 38, the lid 5 is attached in the closing direction S. Although the biasing force for biasing may be insufficient, on the other hand, the biasing force for biasing the lid 5 in the closing direction S is supplemented by gradually shortening the auxiliary tension coil spring 44 from the most extended state. Be seen. As a result, the lifting force of the user required to rotate the lid 5 upward from the open position PO to the closed position PS to close the opening 3 is reduced.

また、引張りコイルばね３８と補助引張りコイルばね４４とを用いて蓋５を閉方向Ｓへ付勢しているため、引張りコイルばね３８のばね力（引張力）を低減して引張りコイルばね３８を小型軽量化することができる。 In addition, since the lid 5 is biased in the closing direction S by using the tension coil spring 38 and the auxiliary tension coil spring 44, the spring force (tensile force) of the tension coil spring 38 is reduced to reduce the tension coil spring 38. It can be made smaller and lighter.

また、ターンバックル３９を操作して、引張りコイルばね３８のばね力（引張力）を調節することにより、使用者が蓋５を開閉するのに要する力を調節することができる。
また、図１０に示すように、蓋５を開位置ＰＯまで開いた際、補助引張りコイルばね４４は最も伸長した状態よりも短縮しているため、引張りコイルばね３８とターンバックル３９とに作用する補助引張りコイルばね４４の引張力は最大の引張力よりも小さく、これにより、引張りコイルばね３８とターンバックル３９とがほぼ一直線上に配置される。 In addition, by operating the turnbuckle 39 to adjust the spring force (tensile force) of the tension coil spring 38, the force required for the user to open and close the lid 5 can be adjusted.
Further, as shown in FIG. 10, when the lid 5 is opened to the open position PO, the auxiliary tension coil spring 44 is shorter than the most extended state, and therefore acts on the tension coil spring 38 and the turnbuckle 39. The tension force of the auxiliary tension coil spring 44 is smaller than the maximum tension force, so that the tension coil spring 38 and the turnbuckle 39 are arranged substantially in a straight line.

仮に、蓋５を開位置ＰＯまで開いた際、補助引張りコイルばね４４が最も伸長した状態になると、引張りコイルばね３８とターンバックル３９とに作用する補助引張りコイルばね４４の引張力が最大になり、引張りコイルばね３８とターンバックル３９とが、一直線上ではなく、山なりに屈曲して配置されてしまう虞があり、このような山なりに屈曲した配置になった場合、引張りコイルばね３８の引張力の一部がロスしてしまう虞がある。 If the auxiliary tension coil spring 44 is in the most extended state when the lid 5 is opened to the open position PO, the tension force of the auxiliary tension coil spring 44 acting on the tension coil spring 38 and the turnbuckle 39 becomes maximum. The tension coil spring 38 and the turnbuckle 39 may be arranged not in a straight line but in a mountain-like bent arrangement. In such a mountain-like bent arrangement, the tension coil spring 38 Part of the tensile force may be lost.

１天井収納用梯子装置
２天井
３開口部
５蓋
６天井裏
７床
９梯子
１１取付用野縁（天井側）
１７第１ヒンジ部材（第１取付部材）
２３第２ヒンジ部材（第２取付部材）
２６支持部
２９リンク
３０付勢部材
３１補助付勢部材
３４第１リンク部材
３５第２リンク部材
３８引張りコイルばね
３９ターンバックル（調節部材）
４４補助引張りコイルばね
５５外枠（天井側）
Ａ所定位置
Ｂ第１の範囲
Ｃ第２の範囲
Ｓ閉方向
ＰＳ閉位置
ＰＯ開位置 1 Ceiling storage ladder device 2 Ceiling 3 Opening 5 Lid 6 Ceiling back 7 Floor 9 Ladder 11 Mounting edge (ceiling side)
17 First Hinge Member (First Mounting Member)
23 Second Hinge Member (Second Attachment Member)
26 support part 29 link 30 biasing member 31 auxiliary biasing member 34 first link member 35 second link member 38 tension coil spring 39 turnbuckle (adjustment member)
44 Auxiliary tension coil spring 55 Outer frame (ceiling side)
A predetermined position B first range C second range S closing direction PS closed position PO open position

Claims

A lid that opens and closes the opening formed on the ceiling,
A ladder device for a ceiling storage, comprising a ladder folded and stored in the back of the ceiling, extended, and extended between the opening of the ceiling and the floor.
The upper end of the ladder is vertically rotatably attached to the ceiling side via the first attachment member,
The lid is vertically rotatably attached to the ceiling side via the second attachment member,
The lid is provided with a support portion that supports the ladder from below ,
The support and the ladder are separated,
Between the ceiling and the lid, a flexible link and a biasing member for biasing the lid in the closing direction are provided.
The link has a first link member whose one end is rotatably connected to the ceiling side, and a second link member whose one end is rotatably connected to the lid,
The other end of the first link member and the other end of the second link member are rotatably connected to each other,
One end of the biasing member is provided on the ceiling side,
The other end of the biasing member is connected to one end of the second link member,
A ceiling storage ladder device, wherein an auxiliary urging member for urging the lid in the closing direction is provided between the first link member and the urging member.

The first link member is shorter than the second link member,
The biasing member has a tension spring,
The auxiliary biasing member has an auxiliary tension spring,
The tension of the auxiliary tension spring is less than the tension of the tension spring,
The expansion and contraction direction of the tension spring intersects with the expansion and contraction direction of the auxiliary tension spring,
The auxiliary tension spring is most extended at a predetermined position between the closed position and the most open position of the lid,
When the lid pivots downward from the closed position and opens to the open position, the tension spring gradually expands, and the auxiliary tension spring gradually expands in the first range from the closed position to the predetermined position and opens from the predetermined position. The ladder device for ceiling storage according to claim 1, wherein the ladder device is gradually shortened in a second range up to the position.

The biasing member ceiling for housing ladder device according to claim 2, characterized in that the chromatic adjustment member for adjusting the spring force of the tension spring.