JP6765723B2 - Bracket bracket for drop bar - Google Patents

Bracket bracket for drop bar Download PDF

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JP6765723B2
JP6765723B2 JP2018049431A JP2018049431A JP6765723B2 JP 6765723 B2 JP6765723 B2 JP 6765723B2 JP 2018049431 A JP2018049431 A JP 2018049431A JP 2018049431 A JP2018049431 A JP 2018049431A JP 6765723 B2 JP6765723 B2 JP 6765723B2
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cylindrical body
lid member
drop
insertion hole
peripheral surface
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JP2019157588A (en
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安藤　康司
康司 安藤
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株式会社日中製作所
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Description

本発明は、門扉等に用いられる落とし棒を落下係合する落とし棒用受け金具に関する。 The present invention relates to a drop bar receiving metal fitting that drops and engages a drop bar used for a gate or the like.

例えば、門扉を係止するために門扉の下端に落とし棒を設け、床面に受け金具を埋め込んでおいて、落とし棒を落下させて受け金具に係合させて、門扉を閉鎖状態又は開放状態に保持するように構成されている。
前記落とし棒用受け金具として特許文献１に開示されたものは、上端には内周に突出するフランジが在る中空の円筒形本体と、該本体内を摺動し得かつ該本体上端の該フランジの内側面に衝合し得る下端が開いて上端が閉じた中空円筒の摺動部材と、該本体の下端に取付けられた底部材と、該底部材と該摺動部材の上端閉塞部との間に在るスプリングとを包含している（実用新案登録請求の範囲）。 For example, in order to lock the gate, a drop bar is provided at the lower end of the gate, a receiving metal fitting is embedded in the floor surface, and the dropping bar is dropped and engaged with the receiving metal fitting to close or open the gate. It is configured to hold in.
The metal fittings for the drop bar disclosed in Patent Document 1 include a hollow cylindrical main body having a flange protruding inward at the upper end, and the upper end of the main body which can slide in the main body. A hollow cylindrical sliding member with an open lower end that can abut against the inner surface of the flange and a closed upper end, a bottom member attached to the lower end of the main body, and the bottom member and the upper end closing portion of the sliding member. It includes the springs between the two (the scope of the utility model registration claims).

実開昭４９−１２２６３２号公報Jitsukaisho 49-12632

前記従来技術は、落とし棒を落下させたときにスプリングを介して摺動部材で弾力的に受け、落とし棒を引き上げたときに摺動部材の上端閉塞部で円筒形本体のフランジ内を施蓋することができるが、上端閉塞部とフランジとのハメアイはラフであるため、両者の隙間に砂塵が入り込み、摺動部材の摺動に支障を来すことがある。砂塵のために摺動部材が摺動しなくなると、受け金具の落とし棒挿入穴は開口したままになる。 In the prior art, when the drop rod is dropped, it is elastically received by the sliding member via a spring, and when the drop rod is pulled up, the inside of the flange of the cylindrical body is covered with the upper end closing portion of the sliding member. However, since the hook eye between the upper end closed portion and the flange is rough, dust may enter the gap between the two and hinder the sliding of the sliding member. When the sliding member does not slide due to dust, the drop bar insertion hole of the receiving metal fitting remains open.

本発明は、このような従来技術の問題点を解決できるようにした落とし棒用受け金具を提供することを目的とする。
本発明は、蓋部材の胴部の外周面にリブを周方向複数本形成しておいて、蓋部材と円筒体との隙間に砂塵が入り込んでも、その砂塵をリブ間から落下できるようにした落とし棒用受け金具を提供することを目的とする。 An object of the present invention is to provide a metal fitting for a drop bar capable of solving such a problem of the prior art.
In the present invention, a plurality of ribs are formed on the outer peripheral surface of the body of the lid member in the circumferential direction so that even if dust enters the gap between the lid member and the cylindrical body, the dust can fall from between the ribs. It is an object of the present invention to provide a metal fitting for a drop bar.

本発明は、蓋部材の胴部の外周面に落下溝を周方向複数本形成しておいて、蓋部材と円筒体との隙間に砂塵が入り込んでも、その砂塵を落下溝から落下できるようにした落とし棒用受け金具を提供することを目的とする。 In the present invention, a plurality of drop grooves are formed on the outer peripheral surface of the body of the lid member in the circumferential direction so that even if dust enters the gap between the lid member and the cylindrical body, the dust can fall from the drop groove. It is an object of the present invention to provide a metal fitting for a drop bar.

本発明における課題解決のための具体的手段は、次の通りである。
第１に、上端に落とし棒挿入穴Ｈを有する円筒体３と、この円筒体３に摺動自在に挿入されていて上部が落とし棒挿入穴Ｈ内を塞ぎ可能な蓋部材４と、前記円筒体３の下部に設けられた底部材５と、円筒体３内で蓋部材４を落とし棒挿入穴Ｈ塞ぎ方向に弾発する弾性体６とを備えており、前記円筒体３には落とし棒挿入穴Ｈの下方側に規制部３ａが形成され、前記蓋部材４は、落とし棒挿入穴Ｈを塞ぐ塞ぎ部４ａと、この塞ぎ部４ａの下方で円筒体３の内周面に摺接可能な胴部４ｂと、前記塞ぎ部４ａと胴部４ｂとの間で円筒体３の規制部３ａに当接して抜け止めされる抜け止め部４ｃとを有する落とし棒用受け金具であって、
前記蓋部材４は胴部４ｂの外周面に円筒体３の内周面と摺接可能なリブ８を周方向間隔をおいて複数本形成し、このリブ８の上部に前記抜け止め部４ｃを形成していることを特徴とする。 Specific means for solving the problem in the present invention are as follows.
First, a cylindrical body 3 having a drop rod insertion hole H at the upper end, a lid member 4 slidably inserted into the cylindrical body 3 and having an upper portion capable of closing the inside of the drop rod insertion hole H, and the cylinder. A bottom member 5 provided at the lower part of the body 3 and an elastic body 6 for dropping the lid member 4 in the cylindrical body 3 in the direction of closing the drop rod insertion hole H are provided, and the drop rod is inserted into the cylindrical body 3. A regulating portion 3a is formed on the lower side of the hole H, and the lid member 4 can be slidably contacted with the closing portion 4a that closes the drop bar insertion hole H and the inner peripheral surface of the cylindrical body 3 below the closing portion 4a. A drop bar receiving metal fitting having a body portion 4b and a retaining portion 4c that abuts on the regulating portion 3a of the cylindrical body 3 and is prevented from coming off between the closing portion 4a and the body portion 4b.
The lid member 4 is formed with a plurality of ribs 8 capable of sliding with the inner peripheral surface of the cylindrical body 3 on the outer peripheral surface of the body portion 4b at intervals in the circumferential direction, and the retaining portion 4c is formed on the upper portion of the ribs 8. It is characterized by being formed.

第２に、上端に落とし棒挿入穴Ｈを有する円筒体３と、この円筒体３に摺動自在に挿入されていて上部が落とし棒挿入穴Ｈ内を塞ぎ可能な蓋部材４と、前記円筒体３の下部に設けられた底部材５と、円筒体３内で蓋部材４を落とし棒挿入穴Ｈ塞ぎ方向に弾発する弾性体６とを備えており、前記円筒体３には落とし棒挿入穴Ｈの下方側に規制部３ａが形成され、前記蓋部材４は、落とし棒挿入穴Ｈを塞ぐ塞ぎ部４ａと、この塞ぎ部４ａの下方で円筒体３の内周面に摺接可能な胴部４ｂと、前記塞ぎ部４ａと胴部４ｂとの間で円筒体３の
規制部３ａに当接して抜け止めされる抜け止め部４ｃとを有する落とし棒用受け金具であって、
前記蓋部材４は胴部４ｂの外周面に円筒体３の内周面との間に入る砂塵を落下させる落下溝９を周方向間隔をおいて複数本形成していることを特徴とする。 Secondly, a cylindrical body 3 having a drop rod insertion hole H at the upper end, a lid member 4 slidably inserted into the cylindrical body 3 and having an upper portion capable of closing the inside of the drop rod insertion hole H, and the cylinder. A bottom member 5 provided at the lower part of the body 3 and an elastic body 6 for dropping the lid member 4 in the cylindrical body 3 in the direction of closing the drop rod insertion hole H are provided, and the drop rod is inserted into the cylindrical body 3. A regulating portion 3a is formed on the lower side of the hole H, and the lid member 4 can be slidably contacted with the closing portion 4a that closes the drop bar insertion hole H and the inner peripheral surface of the cylindrical body 3 below the closing portion 4a. A drop bar receiving metal fitting having a body portion 4b and a retaining portion 4c that abuts on the regulating portion 3a of the cylindrical body 3 and is prevented from coming off between the closing portion 4a and the body portion 4b.
The lid member 4 is characterized in that a plurality of drop grooves 9 for dropping dust entering between the outer peripheral surface of the body portion 4b and the inner peripheral surface of the cylindrical body 3 are formed at intervals in the circumferential direction.

第３に、前記蓋部材４は胴部４ｂに弾性体６の上部を連結する連結部４ｄを有し、前記弾性体６は上部が連結部４ｄに連結されかつ下部が底部材５に支持されたコイルスプリングで形成されており、蓋部材４の胴部４ｂと底部材５との間には、前記コイルスプリングと反対巻きであって蓋部材４の下降後期に圧縮される過負荷コイルスプリング１１を設けていることを特徴とする。 Thirdly, the lid member 4 has a connecting portion 4d for connecting the upper portion of the elastic body 6 to the body portion 4b, and the upper portion of the elastic body 6 is connected to the connecting portion 4d and the lower portion is supported by the bottom member 5. The overload coil spring 11 is formed of a coil spring, and is wound in the opposite direction to the coil spring between the body portion 4b and the bottom member 5 of the lid member 4 and is compressed in the later descent of the lid member 4. It is characterized in that it is provided.

第４に、前記底部材５は、外周に円筒体３の内周面に螺合する雄ねじ部５ａを有し、内部に上下に貫通していて回動工具を係合可能な角穴５ｂを形成していることを特徴とする。 Fourth, the bottom member 5 has a male screw portion 5a screwed onto the inner peripheral surface of the cylindrical body 3 on the outer periphery thereof, and has a square hole 5b that penetrates vertically inside and can engage a rotating tool. It is characterized by being formed.

本発明によれば、蓋部材と円筒体との隙間に砂塵が入り込んでも、その砂塵を落下排除できる。
即ち、請求項１に係る発明は、蓋部材４は胴部４ｂの外周面に円筒体３の内周面と摺接可能なリブ８を周方向間隔をおいて複数本形成しているので、蓋部材４は胴部４ｂの外周面と円筒体３の内周面との間に砂塵が入り込んでも、その砂塵をリブ８間から落下排除でき、蓋部材４の落とし棒挿入穴Ｈ塞ぎ位置復帰を確保でき、また蓋部材４の抜け止め部４ｃの形成が容易にできる。 According to the present invention, even if dust enters the gap between the lid member and the cylindrical body, the dust can be dropped and eliminated.
That is, in the invention according to claim 1, the lid member 4 has a plurality of ribs 8 formed on the outer peripheral surface of the body portion 4b so as to be slidable with the inner peripheral surface of the cylindrical body 3 at intervals in the circumferential direction. Even if dust enters between the outer peripheral surface of the body 4b and the inner peripheral surface of the cylindrical body 3, the lid member 4 can drop and eliminate the dust from between the ribs 8 and return the lid member 4 to the drop bar insertion hole H closing position. Can be secured, and the retaining portion 4c of the lid member 4 can be easily formed.

請求項２に係る発明は、蓋部材４は胴部４ｂの外周面に落下溝９を周方向間隔をおいて複数本形成しているので、蓋部材４は胴部４ｂの外周面と円筒体３の内周面との間に砂塵が入り込んでも、その砂塵を落下溝９から落下排除でき、蓋部材４の落とし棒挿入穴Ｈ塞ぎ位置復帰を確保できる。
請求項３に係る発明は、円筒体３内で蓋部材４を落とし棒挿入穴Ｈ塞ぎ方向に弾発するコイルスプリングの弾性体６に加えて、蓋部材４の下降後期に圧縮される過負荷コイルスプリング１１を設けているので、落とし棒から急激な過負荷を受けても、耐久性及び振動吸収性を向上できる。 In the invention according to claim 2, since the lid member 4 has a plurality of drop grooves 9 formed on the outer peripheral surface of the body portion 4b at intervals in the circumferential direction, the lid member 4 is formed on the outer peripheral surface of the body portion 4b and a cylindrical body. Even if dust enters between the inner peripheral surface of No. 3, the dust can be removed from the drop groove 9 and the drop rod insertion hole H of the lid member 4 can be returned to the closed position.
According to the third aspect of the present invention, in addition to the elastic body 6 of the coil spring in which the lid member 4 is dropped in the cylindrical body 3 and repelled in the direction of closing the rod insertion hole H, the overload coil is compressed in the late descent of the lid member 4. Since the spring 11 is provided, durability and vibration absorption can be improved even if a sudden overload is received from the drop rod.

請求項４に係る発明は、底部材５は内部に上下に貫通した角穴５ｂを形成しているので、回動工具を係合して円筒体３の内周面に螺合するのが容易であり、この角穴５ｂから砂塵や水を抜くことができる。 In the invention according to claim 4, since the bottom member 5 forms a square hole 5b that penetrates vertically inside, it is easy to engage a rotating tool and screw it into the inner peripheral surface of the cylindrical body 3. Therefore, dust and water can be drained from the square hole 5b.

本発明の実施形態を示す断面図であって、（Ａ）は落とし棒挿入穴塞ぎ状態断面図、（Ｂ）は落とし棒係合状態断面図である。It is sectional drawing which shows the embodiment of this invention, (A) is the drop bar insertion hole closed state sectional view, (B) is the drop bar engagement state sectional view. 受け金具の分解断面図である。It is an exploded sectional view of the receiving metal fitting. 受け金具の平面図である。It is a top view of the receiving metal fitting. 蓋部材の正面図である。It is a front view of a lid member.

以下、本発明の実施の形態を図面に基づいて説明する。
図１〜４において、受け金具１は、門扉に装着された落とし棒１５の直下の床面に埋め込まれており、上端に落とし棒挿入穴Ｈを有する円筒体３と、この円筒体３に摺動自在に挿入された蓋部材４と、円筒体３の下部に設けられた底部材５と、円筒体３内に挿入された弾性体６とを備えている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIGS. 1 to 4, the receiving metal fitting 1 is embedded in the floor surface directly below the drop rod 15 mounted on the gate, and has a cylindrical body 3 having a drop rod insertion hole H at the upper end and sliding on the cylindrical body 3. It includes a lid member 4 that is movably inserted, a bottom member 5 that is provided at the bottom of the cylindrical body 3, and an elastic body 6 that is inserted into the cylindrical body 3.

前記円筒体３は上下に貫通した穴を有する円筒形であり、上端に径内方向に突出した内フランジ１６を形成して、内フランジ１６の内周を内フランジ１６より下方部分の内周より小径の落とし棒挿入穴Ｈとし、内フランジ１６の下側を蓋部材４の抜けを規制する規制部３ａとしている。
また、円筒体３は上端外周に径外方向に突出した外フランジ１７を形成して、この外フランジ１７を床上面に当接して、床内への埋没を防止している。また、円筒体３の下部内面には底部材５取付け用の雌ネジ部１８が形成されている。 The cylindrical body 3 has a cylindrical shape having holes penetrating vertically, forms an inner flange 16 protruding inward in the radial direction at the upper end, and makes the inner circumference of the inner flange 16 from the inner circumference of a portion below the inner flange 16. A drop rod insertion hole H having a small diameter is provided, and the lower side of the inner flange 16 is a regulating portion 3a that regulates the removal of the lid member 4.
Further, the cylindrical body 3 forms an outer flange 17 protruding in the outer diameter direction on the outer periphery of the upper end, and the outer flange 17 is brought into contact with the upper surface of the floor to prevent it from being buried in the floor. Further, a female screw portion 18 for attaching the bottom member 5 is formed on the lower inner surface of the cylindrical body 3.

前記蓋部材４はキャップ形状であり、上部が落とし棒挿入穴Ｈ内を塞ぎ可能な塞ぎ部４ａと、この塞ぎ部４ａの下方で円筒体３の内周面に摺接可能な胴部４ｂと、前記塞ぎ部４ａと胴部４ｂとの間で円筒体３の規制部３ａに当接して抜け止めされる抜け止め部４ｃとが形成されている。
蓋部材４の塞ぎ部４ａは落下してくる落とし棒１５と当接する部位であり、落とし棒挿入穴Ｈの内径より僅かに小さく、落とし棒挿入穴Ｈ内に抵抗なく挿脱し、挿入されることにより落とし棒挿入穴Ｈを隙間の少ない状態で塞ぐことができる。 The lid member 4 has a cap shape, and has a closing portion 4a whose upper portion can close the inside of the drop rod insertion hole H, and a body portion 4b which can be slidably contacted with the inner peripheral surface of the cylindrical body 3 below the closing portion 4a. A retaining portion 4c is formed between the closing portion 4a and the body portion 4b so as to come into contact with the regulating portion 3a of the cylindrical body 3 and prevent the cylinder from coming off.
The closing portion 4a of the lid member 4 is a portion that comes into contact with the falling drop rod 15, is slightly smaller than the inner diameter of the drop bar insertion hole H, and is inserted and removed without resistance into the drop bar insertion hole H. Therefore, the drop bar insertion hole H can be closed with a small gap.

蓋部材４の胴部４ｂは外周面に円筒体３の内周面と摺接可能なリブ８が周方向間隔をおいて等間隔に複数本（実施形態では４本）形成されている。各リブ８は胴部４ｂの周方向に一定幅を有して断面形状が略台形状であり、胴部４ｂの上端から下端まで長い突条部である。このリブ８は外周面側が円筒体３の内周面と摺接可能であり、両側縁面が外周側から内周側へ次第に間隔が広がる傾斜面となっている。 A plurality of ribs 8 (four in the embodiment) that can be slidably contacted with the inner peripheral surface of the cylindrical body 3 are formed on the outer peripheral surface of the body portion 4b of the lid member 4 at equal intervals at intervals in the circumferential direction. Each rib 8 has a constant width in the circumferential direction of the body portion 4b, has a substantially trapezoidal cross-sectional shape, and is a long ridge portion from the upper end to the lower end of the body portion 4b. The outer peripheral surface side of the rib 8 is slidable with the inner peripheral surface of the cylindrical body 3, and both side edge surfaces are inclined surfaces whose intervals gradually increase from the outer peripheral side to the inner peripheral side.

前記リブ８は胴部４ｂの軸線と直交する方向の断面形状が略台形の代わりに半円形でもよく、リブ８は胴部４ｂの上下端間に連続しているが、突起を断続した形状でもよい。
前記各リブ８の上端面は、外周側から内周側へ次第に上方移行する傾斜面となっており、この傾斜面が円筒体３の規制部３ａに当接する抜け止め部４ｃとなっている。この抜け止め部４ｃが末広がりテーパ面になっていることにより、規制部３ａに当接すると塞ぎ部４ａを落とし棒挿入穴Ｈの中心に合わせるようになる。 The rib 8 may have a semicircular cross-sectional shape in the direction orthogonal to the axis of the body 4b instead of a substantially trapezoid, and the rib 8 is continuous between the upper and lower ends of the body 4b, but may have an intermittent protrusion. Good.
The upper end surface of each of the ribs 8 is an inclined surface that gradually shifts upward from the outer peripheral side to the inner peripheral side, and this inclined surface serves as a retaining portion 4c that abuts on the regulating portion 3a of the cylindrical body 3. Since the retaining portion 4c has a divergent tapered surface, when it comes into contact with the regulating portion 3a, the closing portion 4a is aligned with the center of the drop rod insertion hole H.

前記蓋部材４において、胴部４ｂの外周面にリブ８を周方向間隔をおいて複数本形成することは、リブ８間の空間によって、胴部４ｂの外周面に周方向間隔をおいて複数本の上下に貫通した落下溝９を形成することになる。
前記胴部４ｂの外周面と円筒体３の内周面との間には、リブ８間の空間、即ち、落下溝９が存在することにより、落とし棒挿入穴Ｈ内から砂塵が入ってきても、胴部４ｂと円筒体３との間に詰まらせることなく落下排除できる。砂塵の落下排除は、蓋部材４が落とし棒挿入穴Ｈを塞ぐ位置まで復帰するのを確保化できる。 In the lid member 4, a plurality of ribs 8 are formed on the outer peripheral surface of the body portion 4b at intervals in the circumferential direction, which is a plurality of ribs 8 formed on the outer peripheral surface of the body portion 4b at intervals in the circumferential direction due to the space between the ribs 8. A drop groove 9 penetrating the top and bottom of the book will be formed.
Since the space between the ribs 8, that is, the drop groove 9 exists between the outer peripheral surface of the body portion 4b and the inner peripheral surface of the cylindrical body 3, dust enters from the inside of the drop rod insertion hole H. However, the fall can be eliminated without clogging between the body portion 4b and the cylindrical body 3. The fall exclusion of dust can ensure that the lid member 4 returns to the position where the drop rod insertion hole H is closed.

胴部４ｂのリブ８の高さ、即ち、落下溝９の溝深さ及び溝幅は、入る可能性のある砂塵の最大径より大きい寸法になっている。
蓋部材４は胴部４ｂの中空内部が弾性体６の上部を連結する連結部４ｄとなっており、前記弾性体６は上部が胴部４ｂ内の連結部４ｄに挿入連結されたコイルスプリングで形成されており、このコイルスプリングが円筒体３内で蓋部材４を落とし棒挿入穴Ｈ塞ぎ方向に弾発しており、落とし棒１５が蓋部材４に落下してきたとき、その衝撃荷重を弾力的に吸収する。 The height of the rib 8 of the body portion 4b, that is, the groove depth and groove width of the drop groove 9, is larger than the maximum diameter of dust that may enter.
The hollow inside of the body portion 4b of the lid member 4 is a connecting portion 4d that connects the upper portion of the elastic body 6, and the elastic body 6 is a coil spring whose upper portion is inserted and connected to the connecting portion 4d in the body portion 4b. The coil spring is formed, and the coil spring elastically drops the lid member 4 in the cylindrical body 3 in the direction of closing the drop rod insertion hole H, and when the drop rod 15 falls on the lid member 4, the impact load is elastic. Absorb to.

蓋部材４の胴部４ｂと底部材５との間には、蓋部材４を落とし棒挿入穴Ｈへの復帰を行う前記弾性体６に加えて、弾性体６のコイルスプリングと反対巻きであって径大で軸方向寸法の短い過負荷コイルスプリング１１が設けられていて二重スプリング構造になっている。この過負荷コイルスプリング１１は弾性体６のコイルスプリングと共に底部材５に支持されている。 Between the body 4b and the bottom member 5 of the lid member 4, in addition to the elastic body 6 that drops the lid member 4 and returns it to the rod insertion hole H, the coil spring of the elastic body 6 is wound in the opposite direction. An overload coil spring 11 having a large diameter and a short axial dimension is provided to form a double spring structure. The overload coil spring 11 is supported by the bottom member 5 together with the coil spring of the elastic body 6.

過負荷コイルスプリング１１は図１（Ｂ）に示すように、蓋部材４の下降中期から、少なくとも下降後期から蓋部材４の胴部４ｂと当接しかつ圧縮されるものであり、落とし棒１５が急激に落下（強い力の押し下げ）したとき、その荷重を強力に受けて反発作用をする。
落とし棒１５が落とし棒挿入穴Ｈ内に挿入されているとき、弾性体６のコイルスプリングは大きく圧縮され、過負荷コイルスプリング１１は少し圧縮された状態になり、弾性体６の圧縮過多を外周側から防止及び保護をし、落とし棒１５が上方へ抜けると、弾性体６が蓋部材４を上部まで押し上げて、抜け止め部４ｃを規制部３ａに当接させる。 As shown in FIG. 1 (B), the overload coil spring 11 is in contact with and compressed from the body portion 4b of the lid member 4 from the middle stage of descent of the lid member 4 and at least from the latter stage of descent, and the drop rod 15 is used. When it falls suddenly (pushing down a strong force), it receives the load strongly and acts as a repulsion.
When the drop rod 15 is inserted into the drop rod insertion hole H, the coil spring of the elastic body 6 is greatly compressed, the overload coil spring 11 is in a slightly compressed state, and the excessive compression of the elastic body 6 is applied to the outer circumference. Preventing and protecting from the side, when the drop rod 15 is pulled out upward, the elastic body 6 pushes up the lid member 4 to the upper part, and the retaining portion 4c is brought into contact with the regulating portion 3a.

前記底部材５は、外周に円筒体３の内周面の雌ネジ部１８に螺合する雄ねじ部５ａを有し、内部に上下に貫通した六角又は四角の角穴５ｂを形成している。
この底部材５は弾性体６及び過負荷コイルスプリング１１の下端を受持するものであり、角穴５ｂに六角棒レンチ等の回動工具を係合することにより円筒体３への装着ができる。 The bottom member 5 has a male screw portion 5a screwed into a female screw portion 18 on the inner peripheral surface of the cylindrical body 3 on the outer periphery thereof, and forms a hexagonal or square hole 5b penetrating vertically inside.
The bottom member 5 receives the lower end of the elastic body 6 and the overload coil spring 11, and can be attached to the cylindrical body 3 by engaging a rotating tool such as a hexagon wrench with the square hole 5b. ..

底部材５は角穴５ｂが貫通穴であることにより、落とし棒挿入穴Ｈから入ってきた砂塵及び水を円筒体３の下方へ排出することができ、砂塵及び水が溜まって弾性体６及び過負荷コイルスプリング１１に悪影響を及ぼすのを防止できる。
なお、本発明は前記実施形態に限定されるものではなく、部材の形状、構成及び組み合わせ等を変更したりすることもできる。 Since the square hole 5b of the bottom member 5 is a through hole, the dust and water that have entered from the drop bar insertion hole H can be discharged below the cylindrical body 3, and the dust and water are collected to collect the elastic body 6 and the elastic body 6. It is possible to prevent the overload coil spring 11 from being adversely affected.
The present invention is not limited to the above embodiment, and the shape, configuration, combination, and the like of the members can be changed.

例えば、蓋部材４の胴部４ｂのリブ８は４本以外でもよく、３本以上を等間隔で設けることが好ましく、リブ８の幅を落下溝９より広くしてもよい。
また、リブ８及び落下溝９は蓋部材４の胴部４ｂに軸線方向に沿った直線形状であるが、傾斜又は螺旋形状でもよい。
さらに、リブ８間の空間を落下溝９としているが、蓋部材４の胴部４ｂの外周面を円筒体３の内周面と摺接する面とし、その外周面に切削により上下に貫通した細い溝を形成して落下溝９としてもよい。 For example, the number of ribs 8 on the body portion 4b of the lid member 4 may be other than four, and it is preferable that three or more ribs 8 are provided at equal intervals, and the width of the ribs 8 may be wider than the drop groove 9.
Further, the rib 8 and the drop groove 9 have a linear shape along the axial direction on the body portion 4b of the lid member 4, but may have an inclined or spiral shape.
Further, although the space between the ribs 8 is a drop groove 9, the outer peripheral surface of the body portion 4b of the lid member 4 is a surface that is in sliding contact with the inner peripheral surface of the cylindrical body 3, and the outer peripheral surface is thin and penetrates vertically by cutting. A groove may be formed to form a drop groove 9.

さらにまた、蓋部材４の胴部４ｂに形成する連結部４ｄは、胴部４ｂの中心から落下溝９の溝底までの寸法より短い寸法を半径とする円形突起を胴部４ｂの下部から下方突出させ、この円形突起に弾性体６のコイルスプリングの上部を嵌合させるように構成してもよい。 Furthermore, the connecting portion 4d formed on the body portion 4b of the lid member 4 has a circular protrusion having a radius shorter than the dimension from the center of the body portion 4b to the groove bottom of the drop groove 9 downward from the lower portion of the body portion 4b. It may be configured to protrude and fit the upper part of the coil spring of the elastic body 6 to the circular protrusion.

１ 受け金具
３ 円筒体
３ａ 規制部
４ 蓋部材
４ａ 塞ぎ部
４ｂ 胴部
４ｃ 抜け止め部
４ｄ 連結部
５ 底部材
５ａ 雄ねじ部
５ｂ 角穴
６ 弾性体
８ リブ
９ 落下溝
１１ 過負荷コイルスプリング
１５ 落とし棒
１６ 内フランジ
１７ 外フランジ
１８ 雌ネジ部
Ｈ 落とし棒挿入穴 1 Receiving metal fittings 3 Cylindrical body 3a Restricting part 4 Lid member 4a Closing part 4b Body part 4c Retaining part 4d Connecting part 5 Bottom member 5a Male thread part 5b Square hole 6 Elastic body 8 Rib 9 Drop groove 11 Overload coil spring 15 Drop bar 16 Inner flange 17 Outer flange 18 Female thread H Drop bar insertion hole

Claims (4)

上端に落とし棒挿入穴（Ｈ）を有する円筒体（３）と、この円筒体（３）に摺動自在に挿入されていて上部が落とし棒挿入穴（Ｈ）内を塞ぎ可能な蓋部材（４）と、前記円筒体（３）の下部に設けられた底部材（５）と、円筒体（３）内で蓋部材（４）を落とし棒挿入穴（Ｈ）塞ぎ方向に弾発する弾性体（６）とを備えており、前記円筒体（３）には落とし棒挿入穴（Ｈ）の下方側に規制部（３ａ）が形成され、前記蓋部材（４）は、落とし棒挿入穴（Ｈ）を塞ぐ塞ぎ部（４ａ）と、この塞ぎ部（４ａ）の下方で円筒体（３）の内周面に摺接可能な胴部（４ｂ）と、前記塞ぎ部（４ａ）と胴部（４ｂ）との間で円筒体（３）の規制部（３ａ）に当接して抜け止めされる抜け止め部（４ｃ）とを有する落とし棒用受け金具であって、
前記蓋部材（４）は胴部（４ｂ）の外周面に円筒体（３）の内周面と摺接可能なリブ（８）を周方向間隔をおいて複数本形成し、このリブ（８）の上部に前記抜け止め部（４ｃ）を形成していることを特徴とする落とし棒用受け金具。 A cylinder (3) having a drop rod insertion hole (H) at the upper end, and a lid member (3) slidably inserted into the cylinder (3) so that the upper part can close the inside of the drop rod insertion hole (H). 4), a bottom member (5) provided at the bottom of the cylindrical body (3), and an elastic body that drops the lid member (4) in the cylindrical body (3) and repels in the direction of closing the rod insertion hole (H). The cylindrical body (3) is provided with a regulating portion (3a) below the drop rod insertion hole (H), and the lid member (4) is provided with the drop rod insertion hole (6). A closing portion (4a) that closes H), a body portion (4b) that can be slidably contacted with the inner peripheral surface of the cylindrical body (3) below the closing portion (4a), and the closing portion (4a) and the body portion. A drop rod receiving metal fitting having a retaining portion (4c) that comes into contact with the regulating portion (3a) of the cylindrical body (3) and is prevented from coming off from the cylinder (4b).
In the lid member (4), a plurality of ribs (8) capable of sliding with the inner peripheral surface of the cylindrical body (3) are formed on the outer peripheral surface of the body portion (4b) at intervals in the circumferential direction, and the ribs (8) are formed. ), Which is characterized in that the retaining portion (4c) is formed on the upper part of the drop bar. 上端に落とし棒挿入穴（Ｈ）を有する円筒体（３）と、この円筒体（３）に摺動自在に挿入されていて上部が落とし棒挿入穴（Ｈ）内を塞ぎ可能な蓋部材（４）と、前記円筒体（３）の下部に設けられた底部材（５）と、円筒体（３）内で蓋部材（４）を落とし棒挿入穴（Ｈ）塞ぎ方向に弾発する弾性体（６）とを備えており、前記円筒体（３）には落とし棒挿入穴（Ｈ）の下方側に規制部（３ａ）が形成され、前記蓋部材（４）は、落とし棒挿入穴（Ｈ）を塞ぐ塞ぎ部（４ａ）と、この塞ぎ部（４ａ）の下方で円筒体（３）の内周面に摺接可能な胴部（４ｂ）と、前記塞ぎ部（４ａ）と胴部（４ｂ）との間で円筒体（３）の規制部（３ａ）に当接して抜け止めされる抜け止め部（４ｃ）とを有する落とし棒用受け金具であって、
前記蓋部材（４）は胴部（４ｂ）の外周面に円筒体（３）の内周面との間に入る砂塵を落下させる落下溝（９）を周方向間隔をおいて複数本形成していることを特徴とする落とし棒用受け金具。 A cylinder (3) having a drop rod insertion hole (H) at the upper end, and a lid member (3) slidably inserted into the cylinder (3) so that the upper part can close the inside of the drop rod insertion hole (H). 4), a bottom member (5) provided at the bottom of the cylindrical body (3), and an elastic body that drops the lid member (4) in the cylindrical body (3) and repels in the direction of closing the rod insertion hole (H). The cylindrical body (3) is provided with a regulating portion (3a) below the drop rod insertion hole (H), and the lid member (4) is provided with the drop rod insertion hole (6). A closing portion (4a) that closes H), a body portion (4b) that can be slidably contacted with the inner peripheral surface of the cylindrical body (3) below the closing portion (4a), and the closing portion (4a) and the body portion. A drop rod receiving metal fitting having a retaining portion (4c) that comes into contact with the regulating portion (3a) of the cylindrical body (3) and is prevented from coming off from the cylinder (4b).
The lid member (4) is formed with a plurality of drop grooves (9) on the outer peripheral surface of the body portion (4b) at intervals in the circumferential direction for dropping dust that enters between the inner peripheral surface of the cylindrical body (3). A metal fitting for a drop bar, which is characterized by being 前記蓋部材（４）は胴部（４ｂ）に弾性体（６）の上部を連結する連結部（４ｄ）を有し、前記弾性体（６）は上部が連結部（４ｄ）に連結されかつ下部が底部材（５）に支持されるコイルスプリングで形成されており、蓋部材（４）の胴部（４ｂ）と底部材（５）との間には、前記コイルスプリングと反対巻きであって蓋部材（４）の下降後期に圧縮される過負荷コイルスプリング（１１）を設けていることを特徴とする請求項１又は２に記載の落とし棒用受け金具。 The lid member (4) has a connecting portion (4d) for connecting the upper portion of the elastic body (6) to the body portion (4b), and the upper portion of the elastic body (6) is connected to the connecting portion (4d). The lower part is formed by a coil spring supported by the bottom member (5), and the winding between the body portion (4b) and the bottom member (5) of the lid member (4) is opposite to that of the coil spring. The drop rod receiving metal fitting according to claim 1 or 2, wherein an overload coil spring (11) that is compressed in the latter stage of lowering of the lid member (4) is provided. 前記底部材（５）は、外周に円筒体（３）の内周面に螺合する雄ねじ部（５ａ）を有し、内部に上下に貫通していて回動工具を係合可能な角穴（５ｂ）を形成していることを特徴とする請求項１〜３のいずれか１項に記載の落とし棒用受け金具。 The bottom member (5) has a male screw portion (5a) screwed onto the inner peripheral surface of the cylindrical body (3) on the outer circumference, and is a square hole that penetrates vertically inside and can engage a rotating tool. The drop bar receiving metal fitting according to any one of claims 1 to 3, wherein (5b) is formed.
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