JP6974407B2 - Combination of box body and lid - Google Patents

Combination of box body and lid Download PDF

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JP6974407B2
JP6974407B2 JP2019166995A JP2019166995A JP6974407B2 JP 6974407 B2 JP6974407 B2 JP 6974407B2 JP 2019166995 A JP2019166995 A JP 2019166995A JP 2019166995 A JP2019166995 A JP 2019166995A JP 6974407 B2 JP6974407 B2 JP 6974407B2
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lid
box body
braking torque
inner ring
coil spring
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JP2021042836A (en
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洋裕 小林
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Origin Co Ltd
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Description

本発明は、箱本体と蓋との組み合わせ、特に、箱本体と蓋とがヒンジ軸を介して接続され、蓋が箱本体の上面を覆う閉位置と箱本体の上面を開放する開位置との間を旋回自在であるものに関する。 The present invention relates to a combination of a box body and a lid, particularly a closed position in which the box body and the lid are connected via a hinge shaft and the lid covers the upper surface of the box body and an open position in which the upper surface of the box body is opened. Regarding things that can be swiveled between.

下記特許文献1には、箱本体と、前記箱本体にヒンジ軸を介して接続され、前記箱本体の上面を覆う閉位置と前記箱本体の上面を開放する開位置との間を旋回自在である蓋との組み合わせの一例が開示されている。 In the following Patent Document 1, the box body is freely swiveled between a closed position which is connected to the box body via a hinge shaft and covers the upper surface of the box body and an open position where the upper surface of the box body is opened. An example of a combination with a lid is disclosed.

特許文献1の箱本体は内側に収容空間部を備えた容器であって、この容器の上面には収容空間部に連通する開口が形成されており、特許文献1で開示された容器(箱本体)と蓋との組み合わせは、乗用車の運転席と助手席との間に設置されるコンソールボックスとして使用されている。箱本体と蓋との組み合わせは、特許文献1に示されるようなコンソールボックスの如き収納部材に限らず、例えば複写機のような収納部材以外のものにも利用される。箱本体が複写機の場合、箱本体は読み取り機能や印字機能等の主要部品が格納された筐体部分に相当し、蓋は箱本体の読み取り部を覆うカバーに相当する。 The box body of Patent Document 1 is a container having a storage space inside, and an opening communicating with the storage space is formed on the upper surface of the container, and the container (box body) disclosed in Patent Document 1 is disclosed. ) And the lid are used as a console box installed between the driver's seat and the passenger seat of the passenger car. The combination of the box body and the lid is not limited to a storage member such as a console box as shown in Patent Document 1, but is also used for a storage member other than a storage member such as a copier. When the box body is a copier, the box body corresponds to the housing part in which the main parts such as the reading function and the printing function are stored, and the lid corresponds to the cover covering the reading part of the box body.

ところで、内輪と外輪とを相対的に回転させる中心軸回りの回転トルクが付加されたときに、回転トルクが所定値より大きいと、コイルばねと内輪との間の摩擦力に打ち勝って外輪と内輪とが相対的に回転する、トルクリミッタなる機械部品も存在する。このようなトルクリミッタの内、内輪と外輪との相対的な回転の方向が正・逆いずれの場合であっても回転することができるものを双方向トルクリミッタといい、その一例としては下記特許文献2に記載されたものがある。このような双方向トルクリミッタは、一般に複写機等の給紙装置に組み込まれて用紙の重層送り防止機構として利用されるが、内輪に対して外輪が回転する際に所定の制動トルクを付与する制動トルク付与手段としても利用することができる。 By the way, when a rotational torque around the central axis that relatively rotates the inner ring and the outer ring is applied, if the rotational torque is larger than a predetermined value, the frictional force between the coil spring and the inner ring is overcome and the outer ring and the inner ring are overcome. There is also a mechanical component called a torque limiter that rotates relatively with and. Among such torque limiters, a bidirectional torque limiter that can rotate regardless of whether the relative rotation direction of the inner ring and the outer ring is forward or reverse is called a bidirectional torque limiter, and the following patent is an example thereof. There is one described in Document 2. Such a bidirectional torque limiter is generally incorporated in a paper feeding device such as a copying machine and used as a multi-layer feeding prevention mechanism for paper, but applies a predetermined braking torque to the inner ring when the outer ring rotates. It can also be used as a braking torque applying means.

特開2009−67105号公報Japanese Unexamined Patent Publication No. 2009-67105 特許第3344905号公報Japanese Patent No. 3344905

上述した特許文献1で開示された組み合わせにあっては、使用者は蓋を極めて軽い力で箱本体に対して旋回させることができるものの、使用者が開位置と閉位置との間の中間位置にて蓋を手放した際には、蓋は自由落下により相当な勢いで中間位置から閉位置まで旋回して箱本体と衝突し、大きな音が発生する。かような蓋の作動は品位を損なうものであり、この蓋が装着された商品の価値を下げてしまう虞がある。また、使用用途によっては、使用者が上記中間位置にて蓋と手放した際に、蓋は中間位置から閉位置に向かって旋回することなく中間位置で保持されることが望ましい場合もある。 In the combination disclosed in Patent Document 1 described above, the user can rotate the lid with respect to the box body with an extremely light force, but the user is in an intermediate position between the open position and the closed position. When the lid is released at, the lid swirls from the intermediate position to the closed position with considerable force due to free fall and collides with the box body, producing a loud noise. The operation of such a lid impairs the dignity, and there is a risk that the value of the product to which the lid is attached may be reduced. Further, depending on the intended use, it may be desirable that the lid is held in the intermediate position without turning from the intermediate position to the closed position when the user releases the lid in the intermediate position.

そこで、上記特許文献1で開示された箱本体と蓋との組み合わせのヒンジ軸に上記特許文献2で開示された制動トルク付与手段(双方向トルクリミッタ)を組み込むことで、蓋が箱本体に対して旋回する際に蓋に一定の制動トルクを付与し、使用者が中間位置で蓋を手放しても蓋が相当な勢いで閉位置まで旋回することを防止する、或いは蓋が中間位置から閉位置に向かって旋回することなく中間位置で保持されるようにすることができる。しかしながら、蓋の重量や要求される上記制動トルクの大きさによっては、制動トルク付与手段が過剰に大型化してしまい、好ましくない。 Therefore, by incorporating the braking torque applying means (bidirectional torque limiter) disclosed in Patent Document 2 into the hinge shaft of the combination of the box body and the lid disclosed in Patent Document 1, the lid can be attached to the box body. A constant braking torque is applied to the lid when turning to prevent the lid from turning to the closed position with considerable force even if the user releases the lid in the intermediate position, or the lid is in the closed position from the intermediate position. It can be held in an intermediate position without turning towards. However, depending on the weight of the lid and the required magnitude of the braking torque, the braking torque applying means becomes excessively large, which is not preferable.

本発明は上記内容に鑑みてなされたものであり、その主たる技術的課題は、コンパクトな構成であるにも拘らず、蓋の旋回に対して充分な制動トルクを付与することが可能な、新規且つ改良された箱本体と蓋との組み合わせを提供することである。 The present invention has been made in view of the above contents, and its main technical problem is that it is possible to apply a sufficient braking torque to the turning of the lid in spite of its compact configuration. And to provide an improved combination of box body and lid.

本発明者は、鋭意検討の結果、ヒンジ軸に対して偏心した偏心軸の周りを自転可能な外歯歯車を設けると共にヒンジ軸を中心とした円弧状に延在する内歯を蓋に設け、上記外歯歯車と内歯とが噛み合うようにし、外歯歯車は制動トルク付与手段による制動トルクを伴って自転するようにすることで、上記主たる技術的課題を達成することができることを見出した。 As a result of diligent studies, the present inventor provided an external gear that can rotate around the eccentric shaft eccentric to the hinge shaft, and provided an arc-shaped internal tooth extending around the hinge shaft on the lid. It has been found that the main technical problem can be achieved by engaging the external gear and the internal tooth and causing the external gear to rotate with the braking torque by the braking torque applying means.

即ち、本発明によれば、上記主たる技術的課題を達成する組み合わせとして、箱本体と、前記箱本体にヒンジ軸を介して接続され、前記箱本体の上面を覆う閉位置と前記箱本体の上面を開放する開位置との間を旋回自在である蓋との組み合わせにおいて、
前記箱本体には、前記ヒンジ軸に対して偏心した偏心軸の周りを自転可能な外歯歯車が設けられ、
前記蓋には、前記ヒンジ軸を中心とした円弧状の空間部が設けられ、前記空間部の外周縁には、前記外歯歯車と噛み合う内歯が周方向に連続して設けられており、
前記外歯歯車は摩擦式の制動トルク付与手段による制動トルクを伴って自転し、前記制動トルクによって前記蓋は前記閉位置と前記開位置との間の中間位置で保持される、ことを特徴とする組み合わせが提供される。
That is, according to the present invention, as a combination for achieving the above-mentioned main technical problems, the box body is connected to the box body via a hinge shaft, and the closed position covering the upper surface of the box body and the upper surface of the box body. In combination with a lid that is swivel between the open position and the open position
The box body is provided with an external gear that can rotate around the eccentric shaft that is eccentric with respect to the hinge shaft.
The lid is provided with an arc-shaped space portion centered on the hinge axis, and internal teeth that mesh with the external tooth gear are continuously provided on the outer peripheral edge of the space portion in the circumferential direction.
The external gear is rotated with a braking torque by a friction type braking torque applying means , and the lid is held at an intermediate position between the closed position and the open position by the braking torque. Combinations are provided.

好ましくは、前記制動トルク付与手段は、前記外歯歯車が外周面に形成された筒状の外輪と、前記外輪の内側に配置された軸状の内輪と、線材を巻回して形成され前記内輪の外周面に装着されたコイルばねとを備え、前記外輪と前記内輪とは相対回転可能であるものの、前記外輪と前記コイルばねとは相対回転不能であり、前記コイルばねの自由状態における内径は前記内輪の外径よりも小さく、前記コイルばねの軸方向両端には、前記コイルばねの径方向外側に延びる一対のフック部が形成されると共に、前記外輪の内周面には、前記一対のフック部の各々が挿入される一対の係止溝が形成され、前記外輪が前記内輪に対して周方向のいずれの方向に回転しても、前記一対のフック部のいずれかが前記一対の係止溝のいずれかに当接し、前記内輪に対する前記コイルばねの締め付け力が弱められる。前記箱本体には旋回規制係合突起が形成されると共に、前記蓋には旋回規制被係合突起が形成されており、前記蓋が前記閉位置から前記開位置まで旋回すると、前記旋回規制係合突起と前記旋回規制被係合突起とが係合するのが好ましい。好適には、前記箱本体は内側に収容空間部を備えており、前記箱本体の上面には前記収容空間部に連通する開口が形成されている。 Preferably, the braking torque applying means is formed by winding a tubular outer ring having the outer tooth gear formed on the outer peripheral surface, a shaft-shaped inner ring arranged inside the outer ring, and a wire rod. The outer ring and the inner ring can rotate relative to each other, but the outer ring and the coil spring cannot rotate relative to each other, and the inner diameter of the coil spring in a free state is A pair of hook portions that are smaller than the outer diameter of the inner ring and extend radially outward of the coil spring are formed at both ends in the axial direction of the coil spring, and the pair of hook portions are formed on the inner peripheral surface of the outer ring. A pair of locking grooves into which each of the hook portions is inserted is formed, and even if the outer ring rotates in any direction in the circumferential direction with respect to the inner ring, one of the pair of hook portions engages with the pair. It abuts on any of the stop grooves and the tightening force of the coil spring on the inner ring is weakened. A swivel restricting engaging projection is formed on the box body, and a swivel restricting engaged projection is formed on the lid. When the lid swivels from the closed position to the open position, the swivel restrictor It is preferable that the combined projection and the swivel-restricted engaged projection engage with each other. Preferably, the box body is provided with a storage space inside, and an opening communicating with the storage space is formed on the upper surface of the box body.

本発明の組み合わせにあっては、箱本体にはヒンジ軸に対して偏心した偏心軸の周りを自転可能な外歯歯車が設けられると共に、蓋にはヒンジ軸を中心として円弧状に延在する内歯が設けられ、上記外歯歯車は内歯と噛み合って制動トルク付与手段による制動トルクを伴って自転する。従って、蓋は上記制動トルクを伴って旋回動することとなる。このとき、ヒンジ軸を中心として円弧状に連続して設けられた内歯は外歯歯車に対して外側から噛み合うことから、上記内歯を一部に含む、ヒンジ軸を中心とした仮想内歯歯車の歯数は外歯歯車の歯数よりも大きくなる。従って、蓋が旋回すると、これと一体である内歯もヒンジ軸の周りを回転することとなるが、かかる内歯の回転は外歯歯車に増速して伝達されることとなり、外歯歯車にかかる回転トルクは低下する。それ故に、制動トルク付与手段が付与する制動トルクの定格が小さいもの、つまり小型の制動トルク付与手段であっても、蓋の旋回に対して充分な抵抗を付与することができるようになる。これにより、使用者が中間位置で蓋を手放してもが中間位置から閉位置に向かって旋回することなく中間位置で保持されるような装置をコンパクトに設計することが可能となる。更に、外歯歯車はヒンジ軸に対して偏心した位置で、ヒンジ軸を中心として周方向に延在する内歯と噛み合うことから、外歯歯車の径は小さくてよく、かかる観点からも上記装置をコンパクトに設計することが可能となる。 In the combination of the present invention, the box body is provided with an external gear that can rotate around the eccentric shaft eccentric with respect to the hinge shaft, and the lid extends in an arc shape around the hinge shaft. Internal teeth are provided, and the external gear meshes with the internal teeth and rotates with braking torque by the braking torque applying means. Therefore, the lid swivels with the braking torque. At this time, since the internal teeth continuously provided in an arc shape centered on the hinge shaft mesh with the external gear from the outside, the virtual internal teeth centered on the hinge shaft including the internal teeth as a part thereof. The number of teeth of the gear is larger than the number of teeth of the external gear. Therefore, when the lid rotates, the internal tooth integrated with the lid also rotates around the hinge shaft, but the rotation of the internal tooth is accelerated and transmitted to the external gear, and the external tooth gear. The rotational torque applied to is reduced. Therefore, even if the braking torque applying means has a small rating of the braking torque, that is, even a small braking torque applying means, sufficient resistance can be applied to the turning of the lid. This makes it possible to compactly design a device in which the lid is held in the intermediate position without turning from the intermediate position to the closed position even if the user releases the lid in the intermediate position. Further, since the external gear is eccentric to the hinge shaft and meshes with the internal teeth extending in the circumferential direction around the hinge shaft, the diameter of the external gear may be small. Can be designed compactly.

本発明に従って構成された組み合わせの好適実施形態の正面図。The front view of the preferred embodiment of the combination configured according to the present invention. 図1に示す組み合わせのA−A断面図。FIG. 2 is a cross-sectional view taken along the line AA of the combination shown in FIG. 図1に示す組み合わせのB−B断面図。BB sectional view of the combination shown in FIG. 図1に示す組み合わせの各構成部品を分解して示す斜視図。The perspective view which shows by disassembling each component of the combination shown in FIG. 図1に示す組み合わせの左側本体接続部を単体で示す斜視図。The perspective view which shows the left-hand body connection part of the combination shown in FIG. 1 by itself. 図1に示す組み合わせの左側蓋接続部材を単体で示す平面図。The plan view which shows the left side lid connecting member of the combination shown in FIG. 1 by itself. 図1に示す組み合わせの制動トルク付与手段を単体で示す図。The figure which shows the braking torque applying means of the combination shown in FIG. 1 by itself. 図7に示す制動トルク付与手段の各構成部品を分解して示す斜視図。FIG. 6 is a perspective view showing each component of the braking torque applying means shown in FIG. 7 in an exploded manner. 図1に示す組み合わせにおいて、本体に対して蓋を作動させた状態を示す図。The figure which shows the state which operated the lid with respect to the main body in the combination shown in FIG. 制動トルク付与手段の第一変形例を単体で示す図。The figure which shows the 1st modification of the braking torque application means by itself. 図10に示す制動トルク付与手段の各構成部品を分解して示す斜視図。FIG. 10 is a perspective view showing each component of the braking torque applying means shown in FIG. 10 in an exploded manner. 図10に示す制動トルク付与手段の制動リングを単体で示す図。FIG. 10 is a diagram showing a single braking ring of the braking torque applying means shown in FIG. 制動トルク付与手段の第二変形例を単体で示す図。The figure which shows the 2nd modification of the braking torque application means by itself. 図13に示す制動トルク付与手段の各構成部品を分解して示す斜視図。FIG. 3 is a perspective view showing each component of the braking torque applying means shown in FIG. 13 in an exploded manner. 図13に示す制動トルク付与手段の制動板を単体で示す図。FIG. 13 is a diagram showing a single braking plate of the braking torque applying means shown in FIG.

以下、本発明に従って構成された組み合わせについて添付図面を参照して、更に詳細に説明する。 Hereinafter, the combinations configured according to the present invention will be described in more detail with reference to the accompanying drawings.

図1乃至図4を参照して説明すると、本発明に従って構成された組み合わせは箱本体2と蓋4とから構成されている。以下の説明においては、特に指定しない限り、前後左右及び上下方向は図1に示す正面図を基準として規定し、「前後方向」とは図1の紙面に対して左右方向のことを、「左右方向」とは図1の紙面に対して垂直方向のことを、「上下方向」とは図1の紙面に対して上下方向のことを夫々意味する。 Explaining with reference to FIGS. 1 to 4, the combination configured according to the present invention is composed of the box body 2 and the lid 4. In the following description, unless otherwise specified, the front-back, left-right, and up-down directions are defined with reference to the front view shown in FIG. 1, and the "front-back direction" refers to the left-right direction with respect to the paper surface of FIG. The "direction" means the direction perpendicular to the paper surface of FIG. 1, and the "vertical direction" means the vertical direction with respect to the paper surface of FIG. 1, respectively.

図1乃至図4を参照して説明すると、箱本体2は前後方向に長い矩形形状の底板8を具備しており、その後方端部には、底板8に対して実質上垂直に起立する略矩形状の後側起立壁10が固着されている。図示は省略するが、底板8の左右側面及び前方端部にも、底板8に対して実質上垂直に起立する左右起立壁及び前方起立壁が固着されており、箱本体2の内側には、後側起立壁10、及び図示しない左右起立壁並びに前方起立壁によって囲繞された収容空間部9が設けられている。従って、図示の実施形態における、箱本体2の上面には、収容空間部9に連通する開口が係止されている。 Explaining with reference to FIGS. 1 to 4, the box body 2 is provided with a rectangular bottom plate 8 that is long in the front-rear direction, and is substantially perpendicular to the bottom plate 8 at its rear end. The rectangular rear standing wall 10 is fixed. Although not shown, the left and right standing walls and the front standing walls that stand substantially perpendicular to the bottom plate 8 are also fixed to the left and right side surfaces and the front end of the bottom plate 8, and the inside of the box body 2 is covered with the left and right standing walls. A rear standing wall 10, a left and right standing wall (not shown), and a storage space 9 surrounded by a front standing wall are provided. Therefore, in the illustrated embodiment, an opening communicating with the accommodation space 9 is locked on the upper surface of the box body 2.

後側起立壁10は底板8の左右方向全域に亘って延在しており、その後側端面における左右方向両側端部の上側角部には夫々前方に変位せしめられた略矩形形状の凹部12a及び12bが形成されている。左側に位置する凹部12a及び右側に位置する凹部12bには夫々、共に後方に向かって平行に延びる左側本体接続部材14a及び右側本体接続部材14bが固着されている。左側に位置する凹部12aの所要位置には、後方に突出する旋回規制係合突起15も固着されている。図示の実施形態においては、旋回規制係合突起15は後側起立壁10に埋め込まれて固定されたボルトである。 The rear upright wall 10 extends over the entire left-right direction of the bottom plate 8, and the upper corners of the left-right end portions on the rear end surface have a substantially rectangular recess 12a and each of which are displaced forward. 12b is formed. A left side main body connecting member 14a and a right side main body connecting member 14b, both of which extend in parallel toward the rear, are fixed to the recess 12a located on the left side and the recess 12b located on the right side, respectively. A swivel restricting engagement protrusion 15 projecting rearward is also fixed to a required position of the recess 12a located on the left side. In the illustrated embodiment, the swivel restricting engagement projection 15 is a bolt embedded and fixed in the rear upright wall 10.

図1、図4及び図5を参照して説明すると、左側本体接続部材14aは左右方向に所要肉厚を備えた略台形の枠状部材であって、共に実質上鉛直に上下方向に延在する前側辺部14a−1及び後側辺部14a−2と、前側辺部14a−1の上端と後側辺部14a−2の上端とを実質上水平に接続する上側辺部14a−3と、前側辺部14a−1の下端と後側辺部14a−2の下端とを接続する、後方に向かって上方に傾斜した下側辺部14a−4とを備えている。後側辺部14a−2には左方向に幾分突出した円形の後側当接部16が形成されており、その中央には後述するヒンジ軸が挿通される貫通穴18が形成されている。前側辺部14a−1にも左方向に幾分突出した円弧形状の前側当接部20が形成されている。前側当接部20は貫通穴18を中心とした円周に沿って延在している。左側本体接続部材14aと後述する左側蓋接続部材とが組み合わされると、左側本体接続部材14aは後側当接部16及び前側当接部20においてのみ左側蓋接続部材と当接することとなる。 Explaining with reference to FIGS. 1, 4 and 5, the left side main body connecting member 14a is a substantially trapezoidal frame-shaped member having a required wall thickness in the left-right direction, and both extend substantially vertically in the vertical direction. The front side portion 14a-1 and the rear side portion 14a-2, and the upper side portion 14a-3 connecting the upper end of the front side portion 14a-1 and the upper end of the rear side portion 14a-2 substantially horizontally. It is provided with a lower side portion 14a-4 inclined upward toward the rear, which connects the lower end of the front side portion 14a-1 and the lower end of the rear side portion 14a-2. A circular rear contact portion 16 slightly protruding to the left is formed on the rear side portion 14a-2, and a through hole 18 through which a hinge shaft described later is inserted is formed in the center thereof. .. The front side contact portion 20 having an arc shape slightly protruding to the left is also formed on the front side portion 14a-1. The front contact portion 20 extends along the circumference centered on the through hole 18. When the left side main body connecting member 14a and the left side lid connecting member described later are combined, the left side main body connecting member 14a comes into contact with the left side lid connecting member only at the rear side contact portion 16 and the front side contact portion 20.

主に図5を参照して説明を続けると、前後方向に見て前側辺部14a−1と後側辺部14a−2との間には、後述する制動トルク付与手段が取り付けられる制動トルク付与手段取付部22が設けられている。制動トルク付与手段取付部22は、上側辺部14a−3の下面から下方に向かって、下側辺部の上面から上方に向かって夫々実質上鉛直に延びる接続片24により支持固定される円筒形状の外側装着壁26を備えている。外側装着壁26の右側端は底壁28によって閉塞されている。外側装着壁26の内側には、これと同軸状に円筒形状の内側装着壁30が底壁28に固着されており、内側装着壁30の内周面には、固定内歯歯車32が形成されている。外側装着壁26及び内側装着壁30の左側端面は右方向に所要程度変位せしめられており、これによって制動トルク付与手段取付部22の左側には、上下方向が接続片24の端面によって規定される同図において二点鎖線で示される円柱形状の空間部34が画成される。 Continuing the explanation mainly with reference to FIG. 5, a braking torque applying means described later is attached between the front side portion 14a-1 and the rear side portion 14a-2 when viewed in the front-rear direction. A means mounting portion 22 is provided. The braking torque applying means mounting portion 22 has a cylindrical shape that is supported and fixed by a connection piece 24 that extends substantially vertically from the lower surface of the upper side portion 14a-3 downward and from the upper surface of the lower side portion upward. The outer mounting wall 26 is provided. The right end of the outer mounting wall 26 is blocked by the bottom wall 28. A cylindrical inner mounting wall 30 is coaxially fixed to the bottom wall 28 inside the outer mounting wall 26, and a fixed internal gear 32 is formed on the inner peripheral surface of the inner mounting wall 30. ing. The left end faces of the outer mounting wall 26 and the inner mounting wall 30 are displaced to the right by a required degree, whereby the vertical direction is defined by the end faces of the connecting pieces 24 on the left side of the braking torque applying means mounting portion 22. In the figure, a cylindrical space portion 34 shown by a two-dot chain line is defined.

右側本体接続部材14bは、左側本体接続部材14aと同一の外径を備えた板状部材であって、これにも後述するヒンジ軸が挿通される貫通穴36が形成されている。 The right side main body connecting member 14b is a plate-shaped member having the same outer diameter as the left side main body connecting member 14a, and a through hole 36 through which a hinge shaft described later is inserted is also formed therein.

図1乃至図4を参照して説明を続けると、蓋4はヒンジ軸38を介して箱本体2に対して旋回自在に接続されている。蓋4は前後方向に長い略矩形形状の天板40を具備している。天板40は全体的に箱本体2の底板8と対応した形状であるが、天板40の後方端部における左右方向両側には左右方向内側に変位せしめられた略矩形状の凹部42a及び42bが形成されている。左側に位置する凹部42a及び右側に位置する凹部42bには夫々、共に天板40の側面に固定されて天板40から垂直に垂下する左側蓋接続部44a及び右側蓋接続部44bが固定されている。左側蓋接続部44a及び右側接続部44bには、左側本体接続部材14a及び右側本体接続部材14bと共通してヒンジ軸38が挿通され、かくして、蓋4は箱本体2の上面を覆う閉位置(図9において実線で示す状態)と箱本体2の上面を開放する開位置(図9において二点鎖線で示す状態)との間を旋回自在に組み合わされる。 Continuing the description with reference to FIGS. 1 to 4, the lid 4 is rotatably connected to the box body 2 via the hinge shaft 38. The lid 4 includes a top plate 40 having a substantially rectangular shape that is long in the front-rear direction. The top plate 40 has a shape corresponding to the bottom plate 8 of the box body 2 as a whole, but substantially rectangular recesses 42a and 42b displaced inward in the left-right direction on both sides in the left-right direction at the rear end of the top plate 40. Is formed. The left side lid connection portion 44a and the right side lid connection portion 44b, which are both fixed to the side surface of the top plate 40 and vertically hang down from the top plate 40, are fixed to the recess 42a located on the left side and the recess 42b located on the right side, respectively. There is. A hinge shaft 38 is inserted into the left side lid connecting portion 44a and the right side connecting portion 44b in common with the left side main body connecting member 14a and the right side main body connecting member 14b, and thus the lid 4 is in a closed position covering the upper surface of the box main body 2. It is swiftly combined between the state shown by the solid line in FIG. 9) and the open position where the upper surface of the box body 2 is opened (the state shown by the two-dot chain line in FIG. 9).

図1、図4及び図6を参照して説明すると、左側蓋接続部材44aは左右方向に所要肉厚を備えた板状部材であって、中心角が90度の扇形状をした主部46と、主部46の上側に位置する矩形形状の取付部48とを備えている。主部46の円弧状外周面を規定する円の中心位置にはヒンジ軸38が挿通される貫通穴50が形成されている。主部46の径方向中間部乃至外周縁部には、貫通穴50を中心とした円弧状の空間部52が形成されている。空間部52の径方向幅は後述する外歯歯車が収容される程度である。そして、空間部52の外周縁には周方向に連続して形成された凹凸からなる内歯54が設けられている。図示の実施形態においては、内歯54の歯数は28であり、内歯54を一部に含む仮想内歯歯車54aの歯数は120である。ここで、仮想内歯歯車54aとは、図6において二点鎖線で示すとおり、内歯54が全周即ち360度に渡って存在していたと仮定した場合の歯車のことを意味する。主部46の外周面の下端部、即ち、取付部48と対向しこれから最も離れた側の端部には、径方向外方に突出する旋回規制被係合突起56が設けられている。取付部48には前後方向に間隔をおいて左右方向に貫通する2つの取付穴58が形成されており、この取付穴58を介して左側蓋接続部材44aはボルトの如き適宜の固定具で天板40に固定される。 Explaining with reference to FIGS. 1, 4 and 6, the left lid connecting member 44a is a plate-shaped member having a required wall thickness in the left-right direction, and is a fan-shaped main portion 46 having a central angle of 90 degrees. And a rectangular mounting portion 48 located above the main portion 46. A through hole 50 through which the hinge shaft 38 is inserted is formed at the center position of a circle defining the arcuate outer peripheral surface of the main portion 46. An arcuate space portion 52 centered on the through hole 50 is formed in the radial intermediate portion to the outer peripheral edge portion of the main portion 46. The radial width of the space portion 52 is such that an external gear, which will be described later, is accommodated. Further, on the outer peripheral edge of the space portion 52, internal teeth 54 made of irregularities continuously formed in the circumferential direction are provided. In the illustrated embodiment, the number of teeth of the internal teeth 54 is 28, and the number of teeth of the virtual internal gear 54a including the internal teeth 54 as a part is 120. Here, the virtual internal tooth gear 54a means a gear when it is assumed that the internal tooth 54 exists over the entire circumference, that is, 360 degrees, as shown by the alternate long and short dash line in FIG. At the lower end of the outer peripheral surface of the main portion 46, that is, at the end facing the mounting portion 48 and farthest from the mounting portion 48, a swivel restricting engaged projection 56 protruding outward in the radial direction is provided. The mounting portion 48 is formed with two mounting holes 58 penetrating in the left-right direction at intervals in the front-rear direction, and the left side lid connecting member 44a is connected to the ceiling with an appropriate fixing tool such as a bolt through the mounting holes 58. It is fixed to the plate 40.

右側蓋接続部材44bは、左側蓋接続部材44aと同一の外形を備えた板状部材であって、これにもヒンジ軸38が挿通される貫通穴60が形成されている。しかしながら、右側蓋接続部材44bには、左側蓋接続部材44aに形成されていたような空間部及び内歯は形成されていない。 The right side lid connecting member 44b is a plate-shaped member having the same outer shape as the left side lid connecting member 44a, and a through hole 60 through which the hinge shaft 38 is inserted is also formed therein. However, the right lid connecting member 44b does not have the space and internal teeth that were formed in the left lid connecting member 44a.

図1乃至図4を参照して説明を続けると、箱本体2には、ヒンジ軸38に対して偏心した番号62で示される偏心軸の周りを自転可能な外歯歯車64が設けられている。図示の実施形態においては、外歯歯車64の歯数は30である。外歯歯車64は蓋4に設けられた内歯54と噛み合うと共に、制動トルク付与手段66によって制動トルクが付与される。 Continuing the description with reference to FIGS. 1 to 4, the box body 2 is provided with an external tooth gear 64 that can rotate around the eccentric shaft indicated by the number 62 eccentric with respect to the hinge shaft 38. .. In the illustrated embodiment, the external gear 64 has 30 teeth. The external gear 64 meshes with the internal teeth 54 provided on the lid 4, and the braking torque is applied by the braking torque applying means 66.

図1乃至図4と共に図7及び図8を参照して説明すると、図示の実施形態の制動トルク付与手段66は、外歯歯車64が外周面に形成された筒状の外輪68と、外輪68の内側に配置された軸状の内輪70と、内輪70の外周面に装着されたコイルばね72とを備えている。 Explaining with reference to FIGS. 7 and 8 together with FIGS. 1 to 4, the braking torque applying means 66 of the illustrated embodiment has a tubular outer ring 68 in which an external tooth gear 64 is formed on an outer peripheral surface and an outer ring 68. A shaft-shaped inner ring 70 arranged inside the inner ring 70 and a coil spring 72 mounted on the outer peripheral surface of the inner ring 70 are provided.

外輪68の断面の内周は円形である。外輪68の軸方向片端は円形の閉塞壁74によって閉塞されており、閉塞壁74の軸方向内面の中央には内輪70の軸方向片端部を受ける円形溝部76が形成されている。外輪68の軸方向他端部には、外歯歯車64が形成されていない円筒形状の嵌合部78が設けられている。外輪68の軸方向他端には円形のシールド板80が圧入され、これによって外輪68の軸方向他端も閉塞されている。外輪68の内周面には、径方向内側に開放されて軸方向に延在する一対の係止溝82が周方向に所定の間隔をおいて形成されている。内輪70は、外輪68の内側においてこれと相対回転可能に配置される。内輪70は円筒形状であって、その軸方向他端面には、左側本体接続部材14aの外側装着壁26に形成された固定内歯歯車32と噛み合い結合される固定外歯歯車84が、内輪70と同軸上に固着されている。コイルばね72は線材を巻回して形成され、その自由状態における内径は内輪70の外径よりも小さい。コイルばね72の軸方向両端には、コイルばね72の径方向外側に向かって延びる一対のフック86が形成されている。コイルばね72は内輪70の外周面を締め付けた状態でこれに装着され、一対フック86の各々が外輪68の一対の係止溝82の各々に挿入される。 The inner circumference of the cross section of the outer ring 68 is circular. One end of the outer ring 68 in the axial direction is closed by a circular closing wall 74, and a circular groove portion 76 for receiving the one end in the axial direction of the inner ring 70 is formed in the center of the axial inner surface of the closing wall 74. At the other end of the outer ring 68 in the axial direction, a cylindrical fitting portion 78 in which the external tooth gear 64 is not formed is provided. A circular shield plate 80 is press-fitted into the other end in the axial direction of the outer ring 68, whereby the other end in the axial direction of the outer ring 68 is also closed. On the inner peripheral surface of the outer ring 68, a pair of locking grooves 82 that are open inward in the radial direction and extend in the axial direction are formed at predetermined intervals in the circumferential direction. The inner ring 70 is arranged inside the outer ring 68 so as to be rotatable relative to the inner ring 70. The inner ring 70 has a cylindrical shape, and on the other end surface in the axial direction, a fixed external gear 84 meshed with and coupled with a fixed internal gear 32 formed on the outer mounting wall 26 of the left main body connecting member 14a is provided on the inner ring 70. It is fixed coaxially with. The coil spring 72 is formed by winding a wire rod, and its inner diameter in a free state is smaller than the outer diameter of the inner ring 70. A pair of hooks 86 extending radially outward of the coil spring 72 are formed at both ends of the coil spring 72 in the axial direction. The coil spring 72 is attached to the inner ring 70 with the outer peripheral surface tightened, and each of the pair of hooks 86 is inserted into each of the pair of locking grooves 82 of the outer ring 68.

上述したとおりに組み合わされた外輪68及び内輪70にあっては、外輪68が内輪70に対して周方向のいずれの方向に回転しても、一対のフック86のいずれかが一対の係止溝82のいずれかに当接し、内輪70に対するコイルばね72の締め付け力が弱められる。このような制動トルク付与手段66は、上述したとおり内輪70の固定外歯歯車84が左側装着壁20に形成された固定内歯歯車32の内側に挿通されてこれと噛み合い結合されると共に、外輪68の嵌合部78が左側装着壁20における制動トルク付与手段取付部22の左側に画成された空間部34内に嵌め合わされ(図5(b)の斜視図も参照されたい)、外輪68(外歯歯車64)が左側本体接続部材14aに対して自転可能な状態でボルト88により抜け止めされる。 In the outer ring 68 and the inner ring 70 combined as described above, even if the outer ring 68 rotates in any direction in the circumferential direction with respect to the inner ring 70, one of the pair of hooks 86 is a pair of locking grooves. It comes into contact with any of 82, and the tightening force of the coil spring 72 with respect to the inner ring 70 is weakened. In such a braking torque applying means 66, as described above, the fixed external gear 84 of the inner ring 70 is inserted into the inside of the fixed internal gear 32 formed on the left side mounting wall 20 and meshed with the fixed external gear 32, and the outer ring is engaged with the fixed external gear 32. The fitting portion 78 of 68 is fitted into the space portion 34 defined on the left side of the braking torque applying means mounting portion 22 on the left mounting wall 20 (see also the perspective view of FIG. 5B), and the outer ring 68 is fitted. (External tooth gear 64) is prevented from coming off by the bolt 88 in a state where it can rotate with respect to the left side main body connecting member 14a.

図1に示すとおりに、各構成部品が組み合わされた本発明の組み合わせにあっては、蓋4は図9において実線で示される閉位置と同図において二点鎖線で示される開位置との間を、ヒンジ軸38を中心に旋回自在となる。蓋4が閉位置にあるときは、天板40は後側起立壁10の上端面と当接してこれによって上下方向に支持され、天板40は底板8と実質上平行となって箱本体2の上面を覆う(箱本体2を閉じる)。このとき、外歯歯車64は図9において空間部52の時計方向側端部に位置する。蓋4が閉位置からヒンジ軸38を中心に旋回せしめられると、天板40に固定された左側蓋接続部材44aもヒンジ軸38を中心に旋回せしめられ、左側蓋接続部材44aに形成された内歯54が時計方向に回転することで外歯歯車64はその場で時計方向に自転させられる。このとき、本発明の組み合わせにあっては、箱本体2にはヒンジ軸38に対して偏心した偏心軸62の周りを自転可能な外歯歯車64が設けられると共に、蓋4にはヒンジ軸38を中心として円弧状に延在する内歯54が設けられ、上記外歯歯車64は内歯54と噛み合って制動トルク付与手段66による制動トルクを伴って自転する。従って、蓋4は上記制動トルクを伴って旋回動することとなる。そして、蓋4には旋回規制被係合突起56が箱本体2には旋回規制係合突起15が夫々設けられているため、蓋4が箱本体2に対して開方向に旋回して図9において二点鎖線で示される開位置に到達すると、旋回被係合突起48が旋回係合突起15と係合して、それ以上の蓋4の箱本体2に対する開方向への旋回は規制される。 As shown in FIG. 1, in the combination of the present invention in which each component is combined, the lid 4 is between the closed position shown by the solid line in FIG. 9 and the open position shown by the two-dot chain line in the figure. Can be swiveled around the hinge shaft 38. When the lid 4 is in the closed position, the top plate 40 comes into contact with the upper end surface of the posterior upright wall 10 and is supported in the vertical direction by the top plate 40, and the top plate 40 is substantially parallel to the bottom plate 8 and the box body 2 Cover the upper surface of the box (close the box body 2). At this time, the external gear 64 is located at the clockwise end of the space 52 in FIG. When the lid 4 is swiveled around the hinge shaft 38 from the closed position, the left side lid connecting member 44a fixed to the top plate 40 is also swiveled around the hinge shaft 38, and the inside formed in the left side lid connecting member 44a. By rotating the teeth 54 in the clockwise direction, the external gear 64 is rotated in the clockwise direction on the spot. At this time, in the combination of the present invention, the box body 2 is provided with an external gear 64 capable of rotating around the eccentric shaft 62 eccentric with respect to the hinge shaft 38, and the lid 4 is provided with the hinge shaft 38. An internal tooth 54 extending in an arc shape is provided around the center of the gear 64 , and the external gear 64 meshes with the internal tooth 54 and rotates with braking torque by the braking torque applying means 66. Therefore, the lid 4 swivels with the braking torque. Since the lid 4 is provided with the swivel-restricted engaging protrusion 56 and the box body 2 is provided with the swivel-restricted engaging protrusion 15, the lid 4 swivels in the open direction with respect to the box body 2 in FIG. When the open position indicated by the two-point chain line is reached, the swivel engaged protrusion 48 engages with the swivel engaging protrusion 15, and further swiveling of the lid 4 with respect to the box body 2 in the open direction is restricted. ..

本発明の組み合わせにあっては、ヒンジ軸を中心として円弧状に連続して設けられた内歯は外歯歯車に対して外側から噛み合うことから、上記内歯を一部に含む、ヒンジ軸を中心とした仮想内歯歯車の歯数は外歯歯車の歯数よりも大きい。従って、蓋が旋回すると、これと一体である内歯もヒンジ軸の周りを回転することとなるが、かかる内歯の回転は外歯歯車に増速して伝達されることとなり、外歯歯車にかかる回転トルクは低下する。それ故に、制動トルク付与手段が付与する制動トルクの定格が小さいもの、つまり小型の制動
トルク付与手段であっても、蓋の旋回に対して充分な抵抗を付与することができるようになる。これにより、使用者が中間位置で蓋を手放してもが中間位置から閉位置に向かって旋回することなく中間位置で保持されるような装置をコンパクトに設計することが可能となる。更に、外歯歯車はヒンジ軸に対して偏心した位置で、ヒンジ軸を中心として周方向に延在する内歯と噛み合うことから、外歯歯車の径は小さくてよく、かかる観点からも上記装置をコンパクトに設計することが可能となる。
In the combination of the present invention, since the internal teeth continuously provided in an arc shape around the hinge shaft mesh with the external gear from the outside, the hinge shaft including the internal teeth as a part thereof is used. The number of teeth of the central virtual internal gear is larger than the number of teeth of the external gear. Therefore, when the lid rotates, the internal tooth integrated with the lid also rotates around the hinge shaft, but the rotation of the internal tooth is accelerated and transmitted to the external gear, and the external tooth gear. The rotational torque applied to is reduced. Therefore, even if the braking torque applying means has a small rating of the braking torque, that is, even a small braking torque applying means, sufficient resistance can be applied to the turning of the lid. This makes it possible to compactly design a device in which the lid is held in the intermediate position without turning from the intermediate position to the closed position even if the user releases the lid in the intermediate position. Further, since the external gear is eccentric to the hinge shaft and meshes with the internal teeth extending in the circumferential direction around the hinge shaft, the diameter of the external gear may be small. Can be designed compactly.

ここで、本発明にかかる箱本体と蓋との組み合わせに含まれる制動トルク付与手段は、上述した実施形態のものに限らず他の形態であってもよい。これについて、図10乃至図15を参照して説明する。 Here, the braking torque applying means included in the combination of the box body and the lid according to the present invention is not limited to the above-described embodiment, and may be another embodiment. This will be described with reference to FIGS. 10 to 15.

図10には上記制動トルク付与手段の第一変形例が示されている。以下の説明では、上述した制動トルク付与手段66と同一の機能を有する部材には同一の番号にxを付して示し、その説明は省略する。
図10及び図11を参照して説明すると、第一変形例の制動トルク付与手段66xの内輪70xの外周面には、コイルばね72に替えて、制動リング90が装着されている。図10及び図11と共に図12を参照して説明すると、制動リング90は金属製であって、円環形状の基部92と、基部92の外周縁から軸方向に延びる円筒形状の円筒壁94とを具備している。円筒壁94の外周縁部には径方向外方に突出する係止片96が周方向に等角度間隔をおいて3個設けられており、係止片96が外輪68xに形成された係止溝82xに嵌り込むことで(本変形例においては、係止溝82xも3個設けられている)、制動リング90は外輪68xの内側でこれに相対回転不能に配置される。基部92の内周縁には、径方向内側に向かって延出した後に、軸方向に湾曲せしめられる作用片98が周方向に等角度間隔をおいて6個設けられている。内輪70xは制動リング90の内側に挿通され、制動リング90の作用片98が内輪70xの外周面と密接することで、内輪70xに対する外輪68xの回転には制動トルクが付与されることとなる。図10及び図11に示すとおり、本変形例にあっては、かような制動リング90が軸方向に多数積層されて外輪68xの内側に配置されており、制動リング90の数を増減させることで上記制動トルクの大きさを調整することが可能となる。
FIG. 10 shows a first modification of the braking torque applying means. In the following description, members having the same function as the above-mentioned braking torque applying means 66 are indicated by adding x to the same number, and the description thereof will be omitted.
Explaining with reference to FIGS. 10 and 11, a braking ring 90 is mounted on the outer peripheral surface of the inner ring 70x of the braking torque applying means 66x of the first modification instead of the coil spring 72. Explaining with reference to FIGS. 10 and 11, the braking ring 90 is made of metal and has an annular base 92 and a cylindrical wall 94 extending axially from the outer peripheral edge of the base 92. Is equipped with. Three locking pieces 96 projecting outward in the radial direction are provided on the outer peripheral edge of the cylindrical wall 94 at equal angular intervals in the circumferential direction, and the locking pieces 96 are locked on the outer ring 68x. By fitting into the groove 82x (in this modification, three locking grooves 82x are also provided), the braking ring 90 is arranged inside the outer ring 68x so as to be relatively non-rotatable. On the inner peripheral edge of the base portion 92, six working pieces 98 that extend inward in the radial direction and then are curved in the axial direction are provided at equal intervals in the circumferential direction. The inner ring 70x is inserted inside the braking ring 90, and the working piece 98 of the braking ring 90 comes into close contact with the outer peripheral surface of the inner ring 70x, so that braking torque is applied to the rotation of the outer ring 68x with respect to the inner ring 70x. As shown in FIGS. 10 and 11, in this modification, a large number of such braking rings 90 are stacked in the axial direction and arranged inside the outer ring 68x, and the number of braking rings 90 is increased or decreased. It is possible to adjust the magnitude of the braking torque with.

図13には上記制動トルク付与手段の第二変形例が示されている。以下の説明では、上述した制動トルク付与手段66と同一の機能を有する部材には同一の番号にyを付して示し、その説明は省略する。
図13及び図14を参照して説明すると、第二変形例の制動トルク付与手段66yの内輪70yの外周面には、軸方向に延在する係止凹部99が周方向に等角度間隔をおいて6個設けられている。そして、内輪70yの外周面には、コイルばね72に替えて、制動板100が装着されている。図13及び図14と共に図15を参照して説明すると、制動板100は一対の片側制動板100a及び他側制動板100bから構成される。これらの制動板はいずれも金属製である。片側制動板100aは円錐台形状の片側基部102を備えている。片側基部102の内周縁には、径方向内側に突出する片側係止凸部104が周方向に等間隔をおいて6個形成されており、片側係止凸部104が内輪70yの係止凹部99に嵌り込むことで、片側制動板100aは内輪70yの外周面にこれに相対回転不能に装着される。他側制動板100bは、円環形状の他側基部106を備えている。他側基部106の外周縁には、径方向外側に突出する他側係止凸部108が周方向等角度間隔をおいて3個形成されており、他側係止凸部108が外輪68yの係止溝82yに嵌り込むことで、(本変形例においても、係止溝82yは3個設けられている)、他側制動板100bは外輪68yの内側でこれに相対回転不能に装着される。片側制動板100aと他側制動板100bとは軸方向に交互に配置されると共に両制動板は軸方向に密接し、かかる密接に起因して、内輪70yに対する外輪68yの回転には制動トルクが付与されることとなる。図13及び図14に示すとおり、本変形例にあっても、上述した制動板100(片側制動板100a及び他側制動板100b)は軸方向に多数配置されており、これらの数を増減させることで上記制動トルクの大きさを調整することが可能となる。
FIG. 13 shows a second modification of the braking torque applying means. In the following description, members having the same function as the above-mentioned braking torque applying means 66 are indicated by adding y to the same number, and the description thereof will be omitted.
Explaining with reference to FIGS. 13 and 14, on the outer peripheral surface of the inner ring 70y of the braking torque applying means 66y of the second modification, the locking recesses 99 extending in the axial direction are spaced at equal angles in the circumferential direction. There are 6 of them. A braking plate 100 is mounted on the outer peripheral surface of the inner ring 70y instead of the coil spring 72. Explaining with reference to FIG. 15 together with FIGS. 13 and 14, the braking plate 100 is composed of a pair of one-sided braking plates 100a and the other-side braking plate 100b. All of these braking plates are made of metal. The one-sided braking plate 100a includes a truncated cone-shaped one-sided base 102. On the inner peripheral edge of the one-side base 102, six one-side locking protrusions 104 protruding inward in the radial direction are formed at equal intervals in the circumferential direction, and the one-side locking protrusion 104 is a locking recess of the inner ring 70y. By fitting into 99, the one-side braking plate 100a is mounted on the outer peripheral surface of the inner ring 70y so as to be relatively non-rotatable. The other side braking plate 100b includes a ring-shaped other side base 106. On the outer peripheral edge of the other side base 106, three other side locking convex portions 108 protruding outward in the radial direction are formed at equal angular intervals in the circumferential direction, and the other side locking convex portions 108 are formed on the outer ring 68y. By fitting into the locking groove 82y (also in this modification, three locking grooves 82y are provided), the other side braking plate 100b is mounted on the inside of the outer ring 68y so as to be relatively non-rotatable. .. The one-side braking plate 100a and the other-side braking plate 100b are alternately arranged in the axial direction, and both braking plates are in close contact with each other in the axial direction. It will be granted. As shown in FIGS. 13 and 14, even in this modification, a large number of the above-mentioned braking plates 100 (one-side braking plate 100a and the other-side braking plate 100b) are arranged in the axial direction, and the number thereof is increased or decreased. This makes it possible to adjust the magnitude of the braking torque.

以上、本発明にかかる箱本体と蓋との組み合わせについて、添付した図面を参照して詳述したが、本発明にかかる箱本体と蓋との組み合わせは上述した実施形態に限定されることはなく、種々の変形例が考えられる。例えば、上述した実施形態においては、蓋4は開位置から閉位置へ旋回する際、及び閉位置から開位置へ旋回する際のいずれの場合であっても制動トルク付与手段によって制動トルクが付与されていたが、既知の一方向クラッチ(ワンウェイクラッチ)を組み合わせて、いずれか一方の旋回のときにのみ制動トルク付与手段による制動トルクが付与されるようにすることもできる。さらにまた、必ずしも箱本体の上面に開口が形成されている必要はなく、例えば複写機の筐体部分のように箱本体の上面は閉塞されていてもよい。 The combination of the box body and the lid according to the present invention has been described in detail with reference to the attached drawings, but the combination of the box body and the lid according to the present invention is not limited to the above-described embodiment. , Various modifications are conceivable. For example, in the above-described embodiment, the braking torque is applied by the braking torque applying means regardless of whether the lid 4 turns from the open position to the closed position or from the closed position to the open position. However, it is also possible to combine a known one-way clutch (one-way clutch) so that the braking torque is applied by the braking torque applying means only when one of the turns is made. Furthermore, the opening does not necessarily have to be formed on the upper surface of the box body, and the upper surface of the box body may be closed, for example, the housing portion of the copying machine.

2:箱本体
4:蓋
52:空間部
54:内歯
62:偏心軸
64:外歯歯車
66:制動トルク付与手段
68:外輪
70:内輪
72:コイルばね
2: Box body 4: Cover 52: Space 54: Internal teeth 62: Eccentric shaft 64: External gears 66: Braking torque applying means 68: Outer ring 70: Inner ring 72: Coil spring

Claims (3)

箱本体と、前記箱本体にヒンジ軸を介して接続され、前記箱本体の上面を覆う閉位置と前記箱本体の上面を開放する開位置との間を旋回自在である蓋との組み合わせにおいて、
前記箱本体には、前記ヒンジ軸に対して偏心した偏心軸の周りを自転可能な外歯歯車が設けられ、
前記蓋には、前記ヒンジ軸を中心とした円弧状の空間部が設けられ、前記空間部の外周縁には、前記外歯歯車と噛み合う内歯が周方向に連続して設けられており、
前記外歯歯車は摩擦式の制動トルク付与手段による制動トルクを伴って自転し、前記制動トルクによって前記蓋は前記閉位置と前記開位置との間の中間位置で保持される、ことを特徴とする組み合わせ。
In the combination of the box body and a lid that is connected to the box body via a hinge shaft and is rotatable between a closed position that covers the upper surface of the box body and an open position that opens the upper surface of the box body.
The box body is provided with an external gear that can rotate around the eccentric shaft that is eccentric with respect to the hinge shaft.
The lid is provided with an arc-shaped space portion centered on the hinge axis, and internal teeth that mesh with the external tooth gear are continuously provided on the outer peripheral edge of the space portion in the circumferential direction.
The external gear is rotated with a braking torque by a friction type braking torque applying means , and the lid is held at an intermediate position between the closed position and the open position by the braking torque. Combination to do.
前記制動トルク付与手段は、前記外歯歯車が外周面に形成された筒状の外輪と、前記外輪の内側に配置された軸状の内輪と、線材を巻回して形成され前記内輪の外周面に装着されたコイルばねとを備え、
前記外輪と前記内輪とは相対回転可能であるものの、前記外輪と前記コイルばねとは相対回転不能であり、
前記コイルばねの自由状態における内径は前記内輪の外径よりも小さく、
前記コイルばねの軸方向両端には、前記コイルばねの径方向外側に延びる一対のフック部が形成されると共に、前記外輪の内周面には、前記一対のフック部の各々が挿入される一対の係止溝が形成され、
前記外輪が前記内輪に対して周方向のいずれの方向に回転しても、前記一対のフック部のいずれかが前記一対の係止溝のいずれかに当接し、前記内輪に対する前記コイルばねの締め付け力が弱められる、請求項1に記載の組み合わせ。
The braking torque applying means is formed by winding a tubular outer ring having the outer gear formed on the outer peripheral surface, a shaft-shaped inner ring arranged inside the outer ring, and a wire rod, and forming the outer peripheral surface of the inner ring. Equipped with a coil spring mounted on the
Although the outer ring and the inner ring can rotate relative to each other, the outer ring and the coil spring cannot rotate relative to each other.
The inner diameter of the coil spring in the free state is smaller than the outer diameter of the inner ring.
A pair of hook portions extending radially outward of the coil spring are formed at both ends in the axial direction of the coil spring, and each of the pair of hook portions is inserted into the inner peripheral surface of the outer ring. Locking groove is formed,
When the outer ring rotates in any direction in the circumferential direction with respect to the inner ring, one of the pair of hook portions abuts on any of the pair of locking grooves, and the coil spring is tightened to the inner ring. The combination according to claim 1, wherein the force is weakened.
前記箱本体には旋回規制係合突起が形成されると共に、前記蓋には旋回規制被係合突起が形成されており、
前記蓋が前記閉位置から前記開位置まで旋回すると、前記旋回規制係合突起と前記旋回規制被係合突起とが係合する、請求項1又は2に記載の組み合わせ。
A swivel-restricted engaging protrusion is formed on the box body, and a swivel-restricted engaged protrusion is formed on the lid.
The combination according to claim 1 or 2, wherein when the lid swivels from the closed position to the open position, the swivel-restricted engaging projection and the swivel-restricted engaged projection engage.
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