JP6168688B2

JP6168688B2 - Safety hook

Info

Publication number: JP6168688B2
Application number: JP2013139918A
Authority: JP
Inventors: 恵太山川; 賢一勝又; 悠子斎藤; 佐藤　秀樹; 秀樹佐藤; 桂齋藤; 典之中嶋; 康多笠原; 山崎　雅之; 雅之山崎
Original assignee: 株式会社エバー商会
Priority date: 2013-07-03
Filing date: 2013-07-03
Publication date: 2017-07-26
Anticipated expiration: 2033-07-03
Also published as: JP2015012914A

Description

本発明は、建設工事現場等の高所で作業を行なう際に、作業者の墜落を防止する安全帯や安全ロープの先端に連結する安全フックに関する。 TECHNICAL FIELD The present invention relates to a safety hook that is connected to the tip of a safety belt or safety rope that prevents a worker from falling when working at a high place such as a construction site.

高所作業において、作業者の墜落を防止する安全帯や安全ロープの先端に連結する安全フックが知られている（特許文献１，２，３等参照）。例えば特許文献３に開示されるように、安全フックは、工事現場等に敷設される単管やロープ等に掛け止め得るように形成した鉤部の下方開口部に、開閉バーを揺動可能な状態にして取り付け、開閉バーの揺動を、鉤部の背側に取り付けたロックレバーによって行なうように形成した構成となっているのが一般的である。 In high-altitude work, there are known safety belts that prevent workers from falling and safety hooks that are connected to the tips of safety ropes (see Patent Documents 1, 2, 3, etc.). For example, as disclosed in Patent Document 3, the safety hook can swing an opening / closing bar in a lower opening portion of a flange portion that is formed so as to be hooked on a single pipe or a rope laid on a construction site or the like. In general, it is configured so that the opening and closing bar is rocked by a lock lever attached to the back side of the collar.

特開２００２−３４５９８７号公報JP 2002-345987 A 特開２００６−１８７５０６号公報JP 2006-187506 A 特開２００７−１１７５７３号公報JP 2007-117573 A

しかしながら、上記特許文献１，２，３に開示される安全フックは、開口部分の狭い逆Ｊ字状に形成され、何れも開閉バーが、鉤部の掛かる方向に直交する方向である横方向（上下方向に直交する方向）の軸を中心に回転自在に支持され、上下方向に回転する。そして、開閉バーは安全フック内方に揺動することで開放する構成とされる。このため、開閉バーが単管や、単管同士を連結する連結部と干渉し易くなり、すなわち作業者の手指が干渉してしまい、掛けたままの状態での通過が不可能となる。また、これら従来の安全フックは、鉤部の形状やサイズ、開口部分の大きさなどが、上記連結部、特に支柱との連結部における通過について考慮されていない。安全フックは、連結部に干渉すれば、掛け替えなければならない。掛け替え時は無綱状態となり、事故の発生にも繋がる。このため、現場では２丁掛け安全帯の使用が指導されるが、２丁掛けの安全帯は両手を使ったり持ち替えたりなど扱いづらく、掛け替えの手間が掛かることから、作業者の評判は芳しくない。一方、連結部との干渉を回避しようとすれば、安全フックが大型化し、重量も大きくなる不利がある。そこで、大型化せず、２丁掛け安全帯よりも扱いやすく、掛け替え不要な安全フックの開発が望まれていた。 However, the safety hooks disclosed in the above-mentioned Patent Documents 1, 2, and 3 are formed in an inverted J shape with a narrow opening portion, and in each case, the opening / closing bar is in a direction perpendicular to the direction in which the hook is applied ( It is supported so as to be rotatable around an axis in a direction perpendicular to the vertical direction) and rotates in the vertical direction. The opening / closing bar is configured to open by swinging inward of the safety hook. For this reason, the open / close bar easily interferes with a single tube or a connecting portion for connecting the single tubes, that is, the operator's fingers interfere with each other, and it is impossible to pass it in the state of being hung. Further, in these conventional safety hooks, the shape and size of the collar portion, the size of the opening portion, and the like are not considered for the passage at the connecting portion, particularly the connecting portion with the support column. If the safety hook interferes with the connecting part, it must be replaced. At the time of change, it becomes unconformity, which leads to the occurrence of an accident. For this reason, the use of a 2-catch safety belt is instructed at the site, but the 2-cable safety belt is difficult to handle, such as using both hands and changing, and it takes time and effort to change, so the operator's reputation is not good. . On the other hand, if the interference with the connecting portion is to be avoided, there is a disadvantage that the safety hook is enlarged and the weight is increased. Therefore, it has been desired to develop a safety hook that does not increase in size and is easier to handle than a two-catch safety belt and that does not require replacement.

本発明は上記状況に鑑みてなされたもので、その目的は、掛止本体部が大型化せず、支柱のある被掛止体同士の連結部を、被掛止体に掛止したまま容易に通過できる、すなわち掛け替えせずに安全を確保して通過できる安全フックを提供することにある。 The present invention has been made in view of the above situation, and the purpose thereof is not to increase the size of the main body of the latch, and it is easy to keep the connecting portion of the latched bodies with the struts on the latched body. It is intended to provide a safety hook that can pass through, i.e., pass through without being replaced.

次に、上記の課題を解決するための手段を、実施の形態に対応する図面を参照して説明する。
本発明の安全フック１１は、支柱１９の上端に架け渡される被掛止体の通過する開放部２３が下方となる鉤状の掛止本体部１３と、
前記開放部２３を挟む前記掛止本体部１３の開放部一端２５に連設され前記開放部２３から外側に離れる方向に延設し端部にロープ接続部２７を有するグリップ部１５と、
前記開放部一端２５に枢支されて基端部３１が回転自在に支持され前記開放部２３に対して開閉自在となる開閉杆１７と、
を具備することを特徴とする。 Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
Safety hook 11 of the present invention, the hook-shaped hook body portion 13 opening 23 for passage of the hooking member bridged to the upper end of the strut 19 becomes lower,
A grip portion 15 that is connected to one end 25 of the opening portion of the latching main body portion 13 that sandwiches the opening portion 23, extends in a direction away from the opening portion 23, and has a rope connection portion 27 at the end portion;
An opening / closing rod 17 that is pivotally supported by the one end 25 of the opening part and is rotatably supported by the base end part 31;
It is characterized by comprising.

この安全フック１１では、グリップ部１５が開放部２３に対して離れる方向に延設されていることによって連結部５７や支柱１９と干渉し難くなる。その結果、連結部５７の位置で掛け替えなどの作業を不要とし高所作業などの安全性を確保できる。
なお、上記構成においては、好ましくは、掛止本体部１３の形状は、逆Ｕ字状に形成されて、開放部２３に対する奥行き及び内幅、所謂懐を大きく形成し、すなわち開放部２３を開閉杆１７にて閉じた状態で、この開閉杆１７の延在方向に対して略直交する方向で掛止本体部１３が長く、且つ開閉杆１７の長さより狭くならないよう内幅長を幅広に形成される。そして、グリップ部１５は、開放部２３に対して閉じた状態の開閉杆１７とで９０°以上の鈍角をなし、掛止部本体１３の開放部一端２５に開放部２３から外側に離れる方向に延在するように、すなわち開閉杆１７とグリップ部１５とでヘ字状となって設けられる。このことから、掛止部本体１３の開放部２３から奥方向となる被掛止体の進入方向、及び支柱１９の立設方向に対して、グリップ部１５がそれらから離れる方向に配置されることになり、作業者Ｐがグリップ部１５を握ったままでも連結部５７や支柱１９と干渉せず、すなわち掛け替えせずに通過可能となる。 In the safety hook 11, the grip portion 15 is extended in a direction away from the opening portion 23, so that it is difficult to interfere with the connecting portion 57 and the support column 19. As a result, a work such as a change is not required at the position of the connecting portion 57, and safety such as a high place work can be secured.
In the above configuration, preferably, the shape of the latching main body portion 13 is formed in an inverted U shape so as to increase the depth and inner width, that is, the so-called pocket with respect to the open portion 23, that is, open / close the open portion 23. When closed by the hook 17, the latching main body 13 is long in a direction substantially orthogonal to the extending direction of the opening / closing hook 17, and the inner width length is formed so as not to be narrower than the length of the opening / closing hook 17. Is done. The grip portion 15 forms an obtuse angle of 90 ° or more with the opening and closing rod 17 in a state of being closed with respect to the opening portion 23, and in a direction away from the opening portion 23 to the opening portion one end 25 of the latch portion main body 13. In other words, the opening / closing rod 17 and the grip portion 15 are provided in a U-shape so as to extend. For this reason, the grip portion 15 is arranged in a direction away from them with respect to the approach direction of the to-be-latched body that is the back direction from the opening portion 23 of the latch portion main body 13 and the standing direction of the column 19. Thus, even if the worker P holds the grip portion 15, the worker P can pass without interfering with the connecting portion 57 and the support column 19, that is, without being switched.

本発明の安全フック１１は、支柱１９の上端に架け渡される被掛止体の通過する開放部２３が下方となる鉤状の掛止本体部１３と、
前記開放部２３を挟む前記掛止本体部１３の開放部一端２５に連設され前記開放部２３から外側に離れる方向に傾斜して垂下し垂下端にロープ接続部２７を有するグリップ部１５と、
前記開放部一端２５に上下方向の枢軸２９を中心に基端部３１が回転自在に支持され所定回転位置に位置規制されることで前記開放部２３を挟む前記掛止本体部１３の開放部他端３３に形成される係合部３５に先端部３７が係合して前記係合部３５からの上下方向の離脱が規制されて前記開放部２３を閉鎖する開閉杆１７と、
を具備することを特徴とする。 Safety hook 11 of the present invention, the hook-shaped hook body portion 13 opening 23 for passage of the hooking member bridged to the upper end of the strut 19 becomes lower,
A grip portion 15 provided continuously with an opening portion one end 25 of the latching main body portion 13 sandwiching the opening portion 23 and having a rope connection portion 27 at a hanging end and inclined downward in a direction away from the opening portion 23;
A base end portion 31 is rotatably supported around a pivot 29 in the vertical direction at one end 25 of the open portion, and is positioned at a predetermined rotational position so that the open portion of the latch main body portion 13 sandwiches the open portion 23. An opening / closing rod 17 that engages a distal end portion 37 with an engagement portion 35 formed at an end 33 and restricts the release in the vertical direction from the engagement portion 35 to close the opening portion 23;
It is characterized by comprising.

この安全フック１１では、開閉杆１７の基端部３１が、上下方向の枢軸２９を中心に、開放部一端２５に回転自在に支持される。開閉杆１７は、枢軸２９を中心に水平方向に回転され、係合部３５との係合が解除される。
掛止本体部１３を被掛止体に通して水平移動した安全フック１１は、支柱１９に到達すると、開閉杆１７が支柱１９に当たる。その際、開閉杆１７は、所定回転位置への位置規制が解除されていると、衝接した支柱１９からの反力により枢軸２９を中心に水平方向に回転する。開閉杆１７が水平方向に回転することで、開放部２３が開放し、開放部２３が支柱１９を通過可能となる。これにより、安全フック１１が、支柱１９に支持される被掛止体同士の連結部５７を通過できることになる。
このとき、開閉杆１７は、水平方向に回転されるので、従来構造のように、掛止本体部内方に揺動する場合に比べ、連結部５７と干渉し難くなる。また、グリップ部１５が開放部２３に対して離れる方向に傾斜配置していることによっても連結部５７や支柱１９と干渉し難くなる。その結果、連結部５７の位置で掛け替えなどの作業を不要とし高所作業などの安全性を確保できる。また、掛止本体部１３が小型化・軽量化可能となる。 In the safety hook 11, the base end portion 31 of the opening / closing rod 17 is rotatably supported by the opening portion one end 25 around the pivot 29 in the vertical direction. The opening / closing rod 17 is rotated in the horizontal direction around the pivot 29, and the engagement with the engagement portion 35 is released.
When the safety hook 11 that has horizontally moved through the latching body 13 through the body to be latched reaches the column 19, the opening / closing rod 17 hits the column 19. At that time, when the position restriction to the predetermined rotation position is released, the opening / closing rod 17 rotates in the horizontal direction around the pivot 29 by the reaction force from the striking support column 19. When the opening / closing rod 17 rotates in the horizontal direction, the opening portion 23 is opened, and the opening portion 23 can pass through the column 19. As a result, the safety hook 11 can pass through the connecting portion 57 between the objects to be hooked supported by the support column 19.
At this time, since the opening / closing rod 17 is rotated in the horizontal direction, it is less likely to interfere with the connecting portion 57 as compared with the case of swinging inwardly in the latching main body portion as in the conventional structure. Further, even when the grip portion 15 is inclined in a direction away from the opening portion 23, it is difficult to interfere with the connecting portion 57 and the support column 19. As a result, a work such as a change is not required at the position of the connecting portion 57, and safety such as a high place work can be secured. Further, the latch main body 13 can be reduced in size and weight.

本発明の安全フック１１は、上記本発明の安全フック１１であって、
前記係合部３５が、前記先端部３７の回転方向に開口して前記先端部３７を通過可能とする溝状に形成されることを特徴とする。 Safety hook 11 of the present invention, there is provided a safety hook 11 of the Akira to the present onset,
The engaging portion 35 is formed in a groove shape that opens in the rotation direction of the tip portion 37 and allows the tip portion 37 to pass therethrough.

この安全フック１１では、溝状の係合部３５に係合して開放部２３を閉塞している開閉杆１７は、回転位置規制が解除されると、開口から脱して容易に係合部３５からの離脱が可能となる。また、元の位置に回転される開閉杆１７は、開口から進入して、容易に係合部３５（元の係合位置）に配置可能となる。 In the safety hook 11, the opening / closing rod 17 that is engaged with the groove-like engaging portion 35 and closes the opening portion 23 is easily removed from the opening when the rotational position restriction is released. It is possible to leave. Further, the opening / closing rod 17 rotated to the original position can enter from the opening and can be easily disposed at the engaging portion 35 (original engaging position).

本発明の安全フック１１は、上記本発明の安全フック１１であって、
コ字状に形成され内側に前記基端部３１を挟み前記開放部一端２５に横方向の操作軸４１を中心に一対のコ字状開口部４３が回転自在に支持され前記開閉杆１７を前記所定回転位置に位置規制するとともに、コ字状連結部４５に設けられた指掛け部４７が前記グリップ部１５へ接近する方向に回転されることで前記開閉杆１７の前記所定回転位置への位置規制を解除する操作片３９を具備することを特徴とする。 Safety hook 11 of the present invention is a safety hook 11 of the present invention,
A pair of U-shaped openings 43 are rotatably supported around the operation shaft 41 in the lateral direction at the open end 25 with the base end 31 sandwiched inside, and the opening / closing rod 17 is The position of the opening / closing rod 17 is restricted to the predetermined rotational position by restricting the position to the predetermined rotational position and rotating the finger hook portion 47 provided in the U-shaped connecting portion 45 in the direction approaching the grip portion 15. The operation piece 39 which cancels | releases is provided.

この安全フック１１では、開閉杆１７は、上下方向の枢軸２９を中心に基端部３１が回転自在に支持され、横方向に回転する。すなわち、掛止本体部１３の開放部２３から内側方向に沿う方向で枢軸２９が設けられ、それに直交する方向に回転する。また、操作片３９は、横方向、すなわち上下方向を軸線方向とする枢軸２９と直交する方向の操作軸４１を中心にコ字状開口部４３が回転自在に支持され、上下方向に回転する。従って、操作片３９が開閉杆１７を挟まない下側位置へ回転されれば、開閉杆１７は、所定回転位置への位置規制が解除され、横方向の回転、すなわち、開放部２３の開閉が可能となる。一方、操作片３９が開閉杆１７を挟む上側位置へ回転されれば、開閉杆１７は、操作片３９に挟持され、所定回転位置に位置規制される。 In the safety hook 11, the opening / closing rod 17 has a base end portion 31 rotatably supported around a pivot 29 in the vertical direction, and rotates in the lateral direction. That is, the pivot 29 is provided in a direction along the inner side direction from the opening part 23 of the latching main body part 13 and rotates in a direction orthogonal thereto. The operation piece 39 is supported by a U-shaped opening 43 so as to be rotatable about an operation shaft 41 in a direction perpendicular to the pivot 29 with the horizontal direction, that is, the vertical direction as the axial direction, and rotates in the vertical direction. Therefore, if the operating piece 39 is rotated to a lower position that does not sandwich the opening / closing rod 17, the position restriction of the opening / closing rod 17 to the predetermined rotation position is released, and the lateral rotation, that is, the opening / closing portion 23 is opened / closed. It becomes possible. On the other hand, if the operation piece 39 is rotated to an upper position sandwiching the opening / closing rod 17, the opening / closing rod 17 is pinched by the operation piece 39 and the position of the operation piece 39 is restricted to a predetermined rotational position.

本発明の安全フック１１は、上記の安全フック１１であって、
前記掛止本体部１３と前記操作片３９との間には、前記開閉杆１７が前記所定回転位置となるように前記操作片３９を付勢するバネ部材４９が設けられることを特徴とする。 Safety hook 11 of the present invention is a safety hook 11 described above,
A spring member 49 for biasing the operation piece 39 is provided between the latching main body 13 and the operation piece 39 so that the opening / closing rod 17 is in the predetermined rotation position.

この安全フック１１では、バネ部材４９の付勢により操作片３９が上側位置に回転されることで、開閉杆１７が所定回転位置である常時閉塞位置となる。また、バネ部材４９は、操作片３９が操作されると、付勢方向に抗して変位することで、操作片３９の操作を許容する。この操作片３９の操作によって、開閉杆１７の回転位置規制が容易に解除可能となる。 In the safety hook 11, the operating piece 39 is rotated to the upper position by the urging of the spring member 49, so that the opening / closing rod 17 is in a normally closed position that is a predetermined rotation position. Further, when the operation piece 39 is operated, the spring member 49 allows the operation piece 39 to be operated by being displaced against the urging direction. By operating the operation piece 39, the rotational position restriction of the opening / closing rod 17 can be easily released.

本発明の安全フック１１は、上記の安全フック１１であって、
前記グリップ部１５には前記操作片３９に係脱して前記操作片３９の回転を規制または規制解除するロック部５１が設けられていることを特徴とする。 Safety hook 11 of the present invention is a safety hook 11 described above,
The grip portion 15 is provided with a lock portion 51 that engages and disengages the operation piece 39 to restrict or release the rotation of the operation piece 39.

この安全フック１１では、ロック部５１が操作片３９に係合することで、操作片３９の操作が不能となる。操作片３９は、ロック部５１の係合が解除されることで、操作が可能となる。つまり、開閉杆１７は、操作片３９とロック部５１とにより、所定回転位置の位置規制の維持、及び係合部３５からの離脱が二重にロックされる。 In the safety hook 11, the lock 51 is engaged with the operation piece 39, so that the operation piece 39 cannot be operated. The operation piece 39 can be operated by releasing the engagement of the lock portion 51. That is, the opening / closing rod 17 is double-locked by the operation piece 39 and the lock portion 51 so as to maintain the position restriction at the predetermined rotational position and to disengage from the engagement portion 35.

本発明に係る請求項１記載の安全フックによれば、グリップ部が開放部に対して離れる方向に延設されていることによって、連結部や支柱と、グリップ部を握る作業者の手指とが干渉し難くなる。その結果、被掛止体から掛止本体部を離脱させるような掛け替え作業が無くなり、すなわち、単管やロープと支柱との連結部分であっても、掛止本体部を被掛止体に掛けた状態のまま通過が可能となり、掛け替えなどの煩雑な作業を不要として被掛止体に沿って移動が可能となり、高所作業における安全性を確保することができる。 According to the safety hook of the first aspect of the present invention, the connecting portion and the support column and the operator's fingers holding the grip portion are provided by extending the grip portion away from the opening portion. It becomes difficult to interfere. As a result, there is no need to change the hook main body from the hooked body, i.e., the hook main body is hung on the hooked body even at the connecting part between a single pipe or rope and a column. Therefore, it is possible to move along the to-be-latched body without requiring a complicated operation such as changing, and it is possible to secure safety in high-altitude work.

本発明に係る請求項１記載の安全フックによれば、被掛止体から掛止本体部を離脱させるような掛け替え作業が無くなり、すなわち、単管やロープと支柱との連結部分であっても、開閉杆が回転することで掛止本体部を被掛止体に掛けた状態のまま通過が可能となり、掛け替えなどの煩雑な作業を不要として被掛止体に沿って移動が可能となり、高所作業における安全性を確保することができる。また、掛止本体部が大型化せず、支柱のある被掛止体同士の連結部を、被掛止体に掛止したまま容易に通過できる。 According to the safety hook of the first aspect of the present invention, there is no need to change the hook main body from the hooked body, that is, even a connecting portion between a single pipe or a rope and a column. Rotating the open / close rod allows the hook body to pass through the hooked body, allowing it to move along the hooked body without the need for complicated work such as switching. Safety at work can be ensured. Moreover, the latching main body portion does not increase in size and can easily pass through the connecting portion between the latched bodies having the support columns while being latched on the latched body.

本発明に係る請求項２記載の安全フックによれば、簡素な構造で、開閉杆の先端部を係合部に対して回転方向にのみ係合解除となるとともに、掛止本体部の開放部に対して上下の方向に開閉杆が回転しない係合状態となり、被掛止体から離脱することがない。 According to the safety hook of the second aspect of the present invention, with a simple structure, the front end portion of the opening / closing rod is disengaged only in the rotational direction with respect to the engaging portion, and the opening portion of the latching main body portion On the other hand, the opening / closing rod does not rotate in the vertical direction, so that it is not detached from the hooked body.

本発明に係る請求項１記載の安全フックによれば、簡素な構造で開閉杆を所定回転位置に位置規制、及び位置規制解除できる。 According to the safety hook of the first aspect of the present invention, it is possible to restrict the position of the opening / closing rod to the predetermined rotational position and to cancel the position restriction with a simple structure.

本発明に係る請求項３記載の安全フックによれば、バネ部材の付勢により常時閉塞位置となる開閉杆の位置規制を、バネ部材の付勢に抗する操作片の操作で容易に解除でき、安全性、操作性を高めることができる。 According to the safety hook of the third aspect of the present invention, the position restriction of the opening / closing rod that is always in the closed position by the biasing of the spring member can be easily released by the operation of the operation piece that resists the biasing of the spring member. , Safety and operability can be improved.

本発明に係る請求項４記載の安全フックによれば、ロック部を解除操作しなければ単独では操作片が操作できず、開閉杆が不用意に開くことを防止して、安全性を向上させることができる。 According to the safety hook according to claim 4 of the present invention, the operation piece cannot be operated alone unless the lock portion is released, and the safety of the open / close hook is prevented from being inadvertently opened. be able to.

本発明の実施形態に係る安全フックの正面図である。It is a front view of the safety hook concerning the embodiment of the present invention. 図１に示した安全フックを裏側から見た背面図である。It is the rear view which looked at the safety hook shown in FIG. 1 from the back side. 操作片及びロック部が握られた安全フックの正面図である。It is a front view of the safety hook with which the operation piece and the lock part were grasped. 安全フック使用現場の説明図である。It is explanatory drawing of the safety hook use site. ロック部解除時の動作説明図である。It is operation | movement explanatory drawing at the time of lock part cancellation | release. 操作片が操作されて開閉杆が回転された安全フックの動作説明図である。It is operation | movement explanatory drawing of the safety hook by which the operation piece was operated and the opening-and-closing hook was rotated. 連結部通過時の動作説明図である。It is operation | movement explanatory drawing at the time of a connection part passage. 開閉杆の回転された安全フックを上側から見た動作説明図である。It is operation | movement explanatory drawing which looked at the safety hook which the opening-and-closing hook was rotated from the upper side.

以下、本発明に係る実施形態を図面を参照して説明する。
図１は本発明の実施形態に係る安全フックの正面図、図２は図１に示した安全フックを裏側から見た背面図、図３は操作片及びロック部が握られた安全フックの正面図である。
本実施形態に掛かる安全フック１１は、掛止本体部１３と、グリップ部１５と、開閉杆１７と、を有する。掛止本体部１３は、支柱１９（図４参照）の上端に架け渡される被掛止体である単管や親綱２１の通過する開放部２３が下方となる鉤状（フック状）に形成される。 Embodiments according to the present invention will be described below with reference to the drawings.
1 is a front view of a safety hook according to an embodiment of the present invention, FIG. 2 is a rear view of the safety hook shown in FIG. 1 viewed from the back side, and FIG. 3 is a front view of the safety hook with an operation piece and a lock portion gripped. FIG.
The safety hook 11 according to the present embodiment includes a latching main body part 13, a grip part 15, and an opening / closing bar 17. The hook body 13 is formed in a hook-like shape with a single pipe that is a body to be hooked over the upper end of the column 19 (see FIG. 4) and an open part 23 through which the master rope 21 passes. Is done.

グリップ部１５は、開放部２３を挟む掛止本体部１３の開放部一端２５に連設される。グリップ部１５は、開放部２３から外側に離れる方向に傾斜し、後述する開閉杆１７の枢軸２９に対し外方向に延び開閉杆１７とで略へ字状に配置して、斜め下方向に延出して垂下端にロープ接続部２７を有する。 The grip part 15 is connected to the opening part one end 25 of the latching main body part 13 that sandwiches the opening part 23. The grip portion 15 is inclined in a direction away from the opening portion 23, extends outwardly with respect to a pivot 29 of the opening / closing rod 17 described later, and is disposed in a substantially square shape with the opening / closing rod 17, and extends obliquely downward. It has a rope connection part 27 at the bottom end.

なお、掛止本体部１３の形状は、逆Ｕ字状に形成されて、開放部２３に対する奥行き及び内幅、所謂懐を大きく形成し、すなわち開放部２３を開閉杆１７にて閉じた状態で、この開閉杆１７の延在方向に対して略直交する方向（図３中Ａ）に掛止本体部１３の最奥部１４が位置し、掛止本体部１３として奥行きが長く形成され、且つ開閉杆１７の長さより狭くならないよう内幅長を幅広に形成される。そして、グリップ部１５は、開放部２３に対して閉じた状態の開閉杆１７とで９０°以上の鈍角（図３中Ｂ）をなし、掛止部本体１３の開放部一端２５に開放部２３から外側に離れる方向に延在するように、すなわち開閉杆１７とグリップ部１５とでヘ字状となって設けられる。 In addition, the shape of the latching main body 13 is formed in an inverted U shape so that the depth and inner width of the opening 23 are large, that is, so-called pockets, that is, in a state where the opening 23 is closed by the opening / closing rod 17. The innermost portion 14 of the latching main body 13 is positioned in a direction substantially orthogonal to the extending direction of the opening / closing rod 17 (A in FIG. 3), and the depth as the latching main body 13 is formed long. The inner width length is formed wider so as not to be narrower than the length of the opening / closing rod 17. The grip portion 15 forms an obtuse angle (B in FIG. 3) of 90 ° or more with the opening / closing rod 17 in a state of being closed with respect to the opening portion 23, and the opening portion 23 is formed at the opening portion one end 25 of the latch portion main body 13. The opening / closing rod 17 and the grip portion 15 are formed in a letter shape so as to extend in a direction away from the outside.

開閉杆１７は、掛止本体部１３に回転自在に取り付けられる。すなわち、掛止本体部１３の開放部一端２５には、上下方向を軸芯とする枢軸２９が設けられる。開閉杆１７は、この枢軸２９を中心に基端部３１が回転自在に支持される。開閉杆１７は、所定回転位置に位置規制されることで、開放部２３を挟む掛止本体部１３の開放部他端３３に形成される係合部３５に先端部３７が係合する。係合部３５に先端部３７が係合した開閉杆１７は、係合部３５からの上下方向の離脱が規制されて、すなわち掛止本体部１３の開放部一端２５から開放部他端３３に掛け渡されるように位置し、開放部２３を閉鎖する。 The opening / closing rod 17 is rotatably attached to the latching main body 13. That is, a pivot 29 having an axis in the vertical direction is provided at one end 25 of the opening portion of the latching main body 13. The opening / closing rod 17 has a base end portion 31 supported rotatably about the pivot 29. The position of the opening / closing rod 17 is restricted to a predetermined rotational position, so that the distal end portion 37 engages with the engaging portion 35 formed at the other open portion 33 of the latching main body 13 sandwiching the open portion 23. The opening / closing rod 17 with the distal end 37 engaged with the engaging portion 35 is restricted from being vertically detached from the engaging portion 35, that is, from the opening portion one end 25 of the latching main body portion 13 to the opening portion other end 33. It is located so as to be spanned and closes the opening 23.

本実施形態において、係合部３５は、先端部３７の回転方向に開口する。すなわち、先端部３７を通過可能とする溝状に形成される。 In the present embodiment, the engaging portion 35 opens in the rotation direction of the distal end portion 37. That is, it is formed in a groove shape that allows passage through the tip portion 37.

掛止本体部１３には、操作片３９が回転自在に設けられる。操作片３９は、開閉杆１７の基端部３１から枢軸２９の軸線方向に沿うやや離れた位置から延設され、コ字状に形成され、内側に開閉杆１７の基端部３１を挟む。掛止本体部１３の開放部一端２５には、横方向、すなわち上下方向を軸線方向とする枢軸２９と直交する方向の操作軸４１が設けられる。操作片３９は、この操作軸４１を中心に一対のコ字状開口部４３が回転自在に支持される。操作片３９は、操作軸４１を中心に回転することで、挟持し、且つコ字状連結部４５が当接した開閉杆１７を所定回転位置に位置規制する。また、操作軸４１は、コ字状連結部４５の外方に突設された指掛け部４７がグリップ部１５へ接近する方向に回転されることで、開閉杆１７の挟持状態を解放し（図３，７，８参照）、開閉杆１７の所定回転位置への位置規制を解除する。 An operation piece 39 is rotatably provided on the latch main body 13. The operation piece 39 extends from a position slightly separated from the base end portion 31 of the opening / closing rod 17 along the axial direction of the pivot 29, is formed in a U shape, and sandwiches the base end portion 31 of the opening / closing rod 17 inside. An operation shaft 41 in a direction orthogonal to the pivot 29 having the horizontal direction, that is, the vertical direction as the axial direction, is provided at one end 25 of the opening portion of the latching main body portion 13. The operation piece 39 is rotatably supported by a pair of U-shaped openings 43 around the operation shaft 41. The operation piece 39 rotates about the operation shaft 41, thereby pinching and restricting the position of the opening / closing rod 17 with which the U-shaped connecting portion 45 abuts at a predetermined rotational position. Further, the operating shaft 41 is released in a state in which the opening / closing rod 17 is clamped by rotating a finger hooking portion 47 projecting outward from the U-shaped connecting portion 45 toward the grip portion 15 (see FIG. 3, 7, 8), the position restriction of the opening / closing rod 17 to the predetermined rotational position is released.

掛止本体部１３と操作片３９との間には、バネ部材４９が配設される。バネ部材４９は、操作片３９の先端となるコ字状連結部４５を開閉杆１７に当接状態として、操作片３９に開閉杆１７が挟持状態を維持し、開閉杆１７が所定回転位置となるように操作片３９を付勢する。 A spring member 49 is disposed between the latching main body 13 and the operation piece 39. The spring member 49 keeps the open / close bar 17 in a sandwiched state between the operation piece 39 with the U-shaped connecting portion 45 serving as the tip of the operation piece 39 in contact with the open / close bar 17, and the open / close bar 17 is at a predetermined rotational position. The operation piece 39 is biased so as to become.

グリップ部１５には、ロック部５１が設けられる。ロック部５１は、グリップ部１５に対してロック軸５３を中心に回転自在に支持される。このロック軸５３は操作軸４１と平行に設けられる。ロック部５１は、操作片３９に係脱することにより、操作片３９の回転を規制または規制解除する。本実施形態では、ロック部５１の一端に係止爪５２を具備し、この係止爪５２が操作片３９のコ字状開口部４３先端に係合することで操作片３９の回転を抑止し、ロック部５１がロック軸５３を中心に回転することで、係合が解除されて操作片３９の回転を可能とする。ロック部５１は、通常時、ロックバネ５５（図２参照）によって、係止爪５２を操作片３９に係合して操作片３９をロックする位置に付勢される。このロックバネ５５に抗してロック部５１を操作することで、操作片３９のロックが解除される。 The grip portion 15 is provided with a lock portion 51. The lock portion 51 is supported so as to be rotatable about the lock shaft 53 with respect to the grip portion 15. The lock shaft 53 is provided in parallel with the operation shaft 41. The lock part 51 is engaged with or disengaged from the operation piece 39 to restrict or release the rotation of the operation piece 39. In the present embodiment, a locking claw 52 is provided at one end of the lock portion 51, and the locking claw 52 is engaged with the distal end of the U-shaped opening 43 of the operation piece 39 to suppress the rotation of the operation piece 39. The lock 51 rotates about the lock shaft 53, so that the engagement is released and the operation piece 39 can be rotated. The lock portion 51 is normally biased to a position where the locking claw 52 is engaged with the operation piece 39 and the operation piece 39 is locked by a lock spring 55 (see FIG. 2). By operating the lock portion 51 against the lock spring 55, the operation piece 39 is unlocked.

次に、安全フック１１の使用方法及び作用を説明する。
図４は安全フック使用現場の説明図、図５はロック部解除時の動作説明図、図６は操作片３９が操作されて開閉杆１７が回転された安全フック１１の動作説明図、図７は連結部通過時の動作説明図、図８は開閉杆１７の回転された安全フック１１を上側から見た動作説明図である。
安全フック１１の使用場所は、例えば駅ホーム屋根上の雪下ろし作業現場等となる。屋根には支柱１９が所定の間隔で建てられ、支柱間には親綱２１が掛け渡される。親綱２１は、支柱１９の上端において締結などされ、例えば図７に示す連結部５７を構成する。この連結部５７は、例えば支柱上端に固定した連結板５９の両端に、隣接する一方の親綱２１の端と隣接する他方の親綱２１の端が接続される。
安全フック１１の使用開始時には、先ず、ロック部５１を解除し（図５参照）、操作片３９を引き（図６参照）、開閉杆１７をフリーとする。この状態で親綱２１に、掛止本体部１３を掛ける。なお、ロック部５１と操作片３９とは、同時に握ることで解除が可能となる。 Next, the usage method and operation of the safety hook 11 will be described.
4 is an explanatory view of the safety hook use site, FIG. 5 is an explanatory view of the operation when releasing the lock portion, FIG. 6 is an explanatory view of the operation of the safety hook 11 in which the operating piece 39 is operated and the opening / closing rod 17 is rotated, FIG. FIG. 8 is an operation explanatory view when passing through the connecting portion, and FIG. 8 is an operation explanatory view of the safety hook 11 rotated by the opening / closing rod 17 as viewed from above.
The place where the safety hook 11 is used is, for example, a snow removal work site on the roof of the station platform. Posts 19 are built on the roof at predetermined intervals, and a master rope 21 is spanned between the posts. The master rope 21 is fastened at the upper end of the support column 19 and constitutes, for example, a connecting portion 57 shown in FIG. In this connecting portion 57, for example, the end of one adjacent master rope 21 and the end of the other master rope 21 adjacent to each other are connected to both ends of a connecting plate 59 fixed to the upper end of the column.
At the start of use of the safety hook 11, first, the lock 51 is released (see FIG. 5), the operation piece 39 is pulled (see FIG. 6), and the opening / closing rod 17 is made free. In this state, the hook main body 13 is hung on the master rope 21. Note that the lock unit 51 and the operation piece 39 can be released by grasping at the same time.

安全フック１１は、操作片３９から手を離すと、バネ部材４９によって操作片３９が上側位置へ回転し、操作片３９の内側に開閉杆１７が位置し挟持状態となって開閉杆１７が閉じる。その後、ロックバネ５５によってロック部５１が操作片３９をロックする。
この状態で、安全フック１１は親綱２１から離脱することが無く、屋根上の作業者Ｐは、腰ベルトから延びるロープを介して連結状態となり安全が確保される。また親綱２１に沿って屋根上を移動可能となる。 When the safety hook 11 is released from the operation piece 39, the operation piece 39 is rotated to the upper position by the spring member 49, and the opening / closing rod 17 is positioned inside the operation piece 39 so that the opening / closing rod 17 is closed. . Thereafter, the lock portion 51 locks the operation piece 39 by the lock spring 55.
In this state, the safety hook 11 is not detached from the master rope 21, and the worker P on the roof is connected through a rope extending from the waist belt, and safety is ensured. Moreover, it becomes possible to move on the roof along the master rope 21.

安全フック１１が支柱１９に到達したなら、ロック部５１と操作片３９とを再度握り、開閉杆１７を支柱１９に押し当てる。これにより、図７に示すように、開閉杆１７は、支柱１９によって回転する。開閉杆１７が回転することで、開放部２３が開かれ、掛止本体部１３は、掛け替えせずに支柱１９を通過することができる。なお、この際、ロック部５１、操作片３９を同時に握らなければ、開放部２３は、支柱１９に当たっても、開放部２３を開放しない。 When the safety hook 11 reaches the column 19, the lock part 51 and the operation piece 39 are gripped again, and the opening / closing rod 17 is pressed against the column 19. Thereby, as shown in FIG. 7, the opening / closing rod 17 is rotated by the support column 19. As the opening / closing rod 17 rotates, the opening 23 is opened, and the latching main body 13 can pass through the column 19 without being replaced. At this time, if the lock part 51 and the operation piece 39 are not grasped at the same time, the opening part 23 does not open the opening part 23 even if it hits the support column 19.

連結部５７の通過後、或いは通過とほぼ同時に、ロック部５１、操作片３９から手指を離すと、連結部５７が開放部２３を通過後、開閉杆１７が元の係止位置に戻る。 When the finger is released from the lock part 51 and the operation piece 39 after passing through the connecting part 57 or almost simultaneously with the passing, the opening / closing rod 17 returns to the original locking position after the connecting part 57 passes through the opening part 23.

このように、安全フック１１では、開閉杆１７の基端部３１が、上下方向の枢軸２９を中心に、開放部一端２５に回転自在に支持される。開閉杆１７は、枢軸２９を中心に水平方向に回転され、先端部３７は係合部３５との係合が解除される。 As described above, in the safety hook 11, the base end portion 31 of the opening / closing rod 17 is rotatably supported by the opening portion one end 25 around the pivot 29 in the vertical direction. The opening / closing rod 17 is rotated in the horizontal direction around the pivot 29, and the distal end portion 37 is disengaged from the engaging portion 35.

掛止本体部１３を親綱２１に通して、この親綱２１に沿って略水平方向に移動した安全フック１１は、支柱１９に到達すると、開閉杆１７が支柱１９に当たる。その際、開閉杆１７は、所定回転位置への位置規制が解除されていると、衝接した支柱１９からの反力により枢軸２９を中心に水平方向に回転する（図７参照）。開閉杆１７が水平方向に回転することで、開放部２３が開放し、支柱１９が開放部２３を通過可能となる。これにより、安全フック１１の掛止本体部１３内側を、支柱１９に支持される親綱２１同士の連結部５７を通過できることになる。 When the safety hook 11 that has passed the hook main body 13 through the master rope 21 and moved in a substantially horizontal direction along the master rope 21 reaches the support column 19, the opening / closing rod 17 hits the support column 19. At that time, when the position restriction to the predetermined rotation position is released, the opening / closing rod 17 rotates in the horizontal direction around the pivot 29 by the reaction force from the strut 19 that has come into contact (see FIG. 7). When the opening / closing rod 17 rotates in the horizontal direction, the opening portion 23 is opened, and the support column 19 can pass through the opening portion 23. Thereby, the inside of the latching main body 13 of the safety hook 11 can pass through the connecting portion 57 between the master ropes 21 supported by the support column 19.

このとき、開閉杆１７は、水平方向に回転されるので（図８参照）、従来構造のように、掛止本体部内方に揺動する場合に比べ、連結部５７と干渉し難くなる。その結果、掛止本体部１３が小型化・軽量化可能となる。つまり、掛止本体部１３の上下高さが小さく抑制できる。また、グリップ部１５が、開放部２３から外側に離れる方向に傾斜していることで、このグリップ部１５を握る手指が開閉杆１７及び開放部２３から退いた位置となり、その手指が開放部２３を通過する連結部５７に対して干渉することがない。すなわち、掛止部本体１３の開放部２３から奥方向となる親綱２１の進入方向、及び支柱１９の立設方向に対して、グリップ部１５がそれらから離れる方向に傾斜して配置されることになり、また、掛止本体部１３の形状が、逆Ｕ字状に形成されて、開放部２３に対する奥行き及び内幅、所謂懐を大きく形成し、掛止本体部１３として奥行きが長く形成され、且つ開閉杆１７の長さより狭くならないよう内幅長を幅広に形成されており、図３のように作業者Ｐがグリップ部１５を握ったままでも連結部５７や支柱１９、支柱１９上端に固定した連結板５９などと干渉せず、すなわち掛け替えせずに通過可能となる。 At this time, since the opening / closing rod 17 is rotated in the horizontal direction (see FIG. 8), it is less likely to interfere with the connecting portion 57 as compared to the case where the opening / closing rod 17 swings inwardly as in the conventional structure. As a result, the latch main body 13 can be reduced in size and weight. That is, the vertical height of the latching main body 13 can be reduced. Further, since the grip portion 15 is inclined in the direction away from the opening portion 23, the finger that grips the grip portion 15 is in a position where it is retracted from the opening / closing rod 17 and the opening portion 23, and the finger is the opening portion 23. There is no interference with the connecting portion 57 that passes through. That is, the grip portion 15 is disposed so as to incline in a direction away from the approach direction of the master rope 21 that is the back direction from the opening portion 23 of the latch portion main body 13 and the standing direction of the support column 19. In addition, the shape of the latching main body 13 is formed in an inverted U shape, so that the depth and inner width, that is, the so-called pocket with respect to the opening 23 is large, and the depth as the latching main body 13 is formed long. In addition, the inner width length is formed so as not to be narrower than the length of the opening / closing rod 17, and even if the operator P holds the grip portion 15 as shown in FIG. It can pass without interfering with the fixed connecting plate 59 or the like, that is, without being switched.

開放部２３を閉塞している開閉杆１７は、支柱１９に当てながら回転させ、開放部２３を開放できる。これにより、支柱回避の直前まで開放部２３を閉塞しておくことができ、安全性が向上する。なお、支柱通過後、開閉杆１７は、操作片３９が操作解除、すなわち手指による握り操作が解除されると、バネ部材４９によって元の位置に戻される操作片３９に従動し、図１に示したように、開放部２３を瞬時に閉塞する。これによっても、安全性が向上する。 The opening / closing rod 17 closing the opening 23 can be rotated while being applied to the support 19 to open the opening 23. Thereby, the opening part 23 can be obstruct | occluded until just before the support | pillar avoidance, and safety improves. After passing through the support column, the opening / closing rod 17 follows the operation piece 39 returned to the original position by the spring member 49 when the operation piece 39 is released, that is, when the gripping operation with fingers is released, as shown in FIG. As described above, the opening portion 23 is instantaneously closed. This also improves safety.

また、安全フック１１では、溝状の係合部３５に係合して開放部２３を閉塞している開閉杆１７は、回転位置規制が解除されると、開口から脱して容易に係合部３５からの離脱が可能となる。また、操作片３９によって元の位置に回転される開閉杆１７は、開口から進入して、容易に係合部３５（元の係合位置）に配置可能となる。その結果、簡素な構造で、開閉杆１７の先端部３７を係合部３５に対して係合・係合解除できる。 In the safety hook 11, the opening / closing rod 17 that is engaged with the groove-like engaging portion 35 and closes the opening portion 23 is easily released from the opening when the rotational position restriction is released. Detachment from 35 is possible. Further, the opening / closing rod 17 rotated to the original position by the operation piece 39 can enter from the opening and can be easily disposed at the engagement portion 35 (original engagement position). As a result, it is possible to engage / disengage the distal end portion 37 of the opening / closing rod 17 with respect to the engaging portion 35 with a simple structure.

さらに、安全フック１１では、コ字状の操作片３９が、開閉杆１７を挟み入れて、コ字状開口部４３が回転自在に支持される。ここで、開閉杆１７は、上下方向の枢軸２９を中心に基端部３１が回転自在に支持され、横方向に回転する。また、操作片３９は、横方向（上下方向に直交する方向）の操作軸４１を中心にコ字状開口部４３が回転自在に支持され、上下方向に回転する。従って、操作片３９が開閉杆１７を挟まない下側位置へ回転されれば、開閉杆１７は、所定回転位置への位置規制が解除され、横方向の回転、すなわち、開放部２３の開閉が可能となる。一方、操作片３９が開閉杆１７を挟む上側位置へ回転されれば、開閉杆１７は、操作片３９に挟持され、所定回転位置に位置規制される。その結果、簡素な構造で開閉杆１７を所定回転位置に位置規制・位置規制解除できる。 Further, in the safety hook 11, the U-shaped operation piece 39 sandwiches the opening / closing rod 17, and the U-shaped opening 43 is rotatably supported. Here, the opening / closing rod 17 has a base end portion 31 rotatably supported around a pivot 29 in the vertical direction and rotates in the lateral direction. The operation piece 39 has a U-shaped opening 43 rotatably supported around an operation shaft 41 in the horizontal direction (a direction perpendicular to the vertical direction), and rotates in the vertical direction. Therefore, if the operating piece 39 is rotated to a lower position that does not sandwich the opening / closing rod 17, the position restriction of the opening / closing rod 17 to the predetermined rotation position is released, and the lateral rotation, that is, the opening / closing portion 23 is opened / closed. It becomes possible. On the other hand, if the operation piece 39 is rotated to an upper position sandwiching the opening / closing rod 17, the opening / closing rod 17 is pinched by the operation piece 39 and the position of the operation piece 39 is restricted to a predetermined rotational position. As a result, it is possible to restrict the position of the opening / closing rod 17 to a predetermined rotational position and release the position restriction with a simple structure.

また、安全フック１１では、バネ部材４９の付勢により操作片３９が上側位置に回転されることで、開閉杆１７が常時閉塞位置となる。また、バネ部材４９は、操作片３９が操作されると、付勢方向に抗して変位することで、操作片３９の操作を許容する。この操作片３９の操作によって、開閉杆１７の回転位置規制が容易に解除可能となる。その結果、バネ部材４９の付勢により常時閉塞位置となる開閉杆１７の位置規制を、バネ部材４９の付勢に抗する操作片３９の操作で容易に解除でき、操作性を高めるとともに、安全性を高めることができる。 Further, in the safety hook 11, the operating piece 39 is rotated to the upper position by the biasing of the spring member 49, so that the opening / closing rod 17 is always in the closed position. Further, when the operation piece 39 is operated, the spring member 49 allows the operation piece 39 to be operated by being displaced against the urging direction. By operating the operation piece 39, the rotational position restriction of the opening / closing rod 17 can be easily released. As a result, the position restriction of the opening / closing rod 17 that is always in the closed position by the biasing of the spring member 49 can be easily released by operating the operation piece 39 that resists the biasing of the spring member 49, improving operability and safety. Can increase the sex.

さらに、安全フック１１では、ロック部５１が操作片３９に係合することで、操作片３９の操作が不能となる。操作片３９は、ロック部５１の係合が解除されることで、操作が可能となる。つまり、開閉杆１７は、操作片３９とロック部５１とにより、係合部３５からの離脱が二重にロックされる。その結果、ロック部５１を解除操作しなければ単独では操作片３９が操作できず、開閉杆１７が不用意に開くことを防止して、安全性を向上させることができる。 Further, in the safety hook 11, the operation of the operation piece 39 becomes impossible because the lock portion 51 is engaged with the operation piece 39. The operation piece 39 can be operated by releasing the engagement of the lock portion 51. That is, the opening / closing rod 17 is doubly locked from the engagement portion 35 by the operation piece 39 and the lock portion 51. As a result, the operation piece 39 cannot be operated alone unless the lock portion 51 is released, and the opening / closing rod 17 can be prevented from being opened carelessly, thereby improving safety.

従来構造のような安全フックによる２丁掛け安全帯は、掛け替え時の動作が多いので、支柱１９を通過するたびに作業の流れが中断されてしまう。これに対し、安全フック１１によれば、作業の流れを止めず、ストレスなく支柱１９を通過でき、屋根上などの高所における作業の際に支柱１９の存在を気にせず移動が可能となる。 Since the two-catch safety belt with the safety hook as in the conventional structure has many operations at the time of switching, the work flow is interrupted every time the column 19 is passed. On the other hand, according to the safety hook 11, the work flow can be stopped without passing through the support column 19 without stress, and the operation can be performed without worrying about the presence of the support column 19 when working at a high place such as on the roof. .

また、従来構造の安全フックでは、上記した連結部５７等を通過可能とするには、フック状部分の大きさを大型化することで対処することになるが、大きくなればなるほど、強度を向上するために厚さを増すなどの対策が必要になり、このことから、安全フックの重量が大きくなり、作業者にとって扱いにくいものになってしまう。これに対し、本発明の安全フック１１によれば、小型化を維持しつつも、支柱１９部分を通過できる広い開口部を確保できる。 Moreover, in the safety hook of the conventional structure, in order to be able to pass through the above-described connecting portion 57 and the like, the size of the hook-shaped portion is dealt with by increasing the size, but the strength increases as the size increases. Therefore, it is necessary to take measures such as increasing the thickness, which increases the weight of the safety hook and makes it difficult for the operator to handle. On the other hand, according to the safety hook 11 of the present invention, it is possible to secure a wide opening through which the column 19 can be passed while maintaining a reduction in size.

そして、本発明の安全フック１１は、既存の親綱設備や、単管などで構成される安全柵、手摺りなど種々の設備に対応し、片手で操作でき、掛け替え不要とすることができるもので、この作業性の向上は、一方の手で安全フック１１を、他方の手で工具や道具を持ったままで作業の中断を無くし、さらには作業時間の短縮化をも図ることが可能となる。 And the safety hook 11 of the present invention can be operated with one hand and can be used without any change, corresponding to existing master rope facilities, various facilities such as a safety fence composed of a single pipe, a handrail, etc. Thus, this improvement in workability eliminates interruption of work while holding the safety hook 11 with one hand and the tool or tool with the other hand, and further shortens the work time. .

なお、掛止本体部１３は、素材の選定、厚み、変形に耐える形状などを適宜適用することが可能である。例えば、掛止本体部１３は、リブ付き形状のクロモリブデン鋼など強度のある素材を使用することで、強度を増しても、より小型・軽量に構成することができる。 In addition, it is possible to apply the shape etc. which withstands selection of a raw material, thickness, and a deformation | transformation suitably for the latching main-body part 13. FIG. For example, the hook body 13 can be made smaller and lighter by using a strong material such as ribbed chromo-molybdenum steel even if the strength is increased.

また、上述した実施形態では、開閉杆１７の開閉方向を、横方向とした例について述べたが、この開閉杆１７の開閉方向は掛止本体部１３の開放部２３に対してどの方向とされていても良く、例えば、基端部３１が開放部一端２５に略水平な軸に枢支されて、この開放部２３に対して掛止本体部１３の内側に回転し揺動する構成や、掛止本体部１３の外方向へグリップ部１５に近づく方向へ回転し揺動する構成などとしてもよい。なお、これらの開閉杆の開閉方向が異なる場合であっても、グリップ部１５は開放部２３に対して外側に離れる方向で延設され、開閉杆１７と成す角度を鈍角とするとともに、掛止本体部１３の最奥部１４が、開閉杆１７の延在方向に対して略直交する方向とされ、掛止本体部１３としての奥行きを長く形成し、グリップ部１５を握る作業者の手指と支柱などの被掛止体２１とが干渉しない構成とする。 In the above-described embodiment, the example in which the opening / closing direction of the opening / closing rod 17 is the lateral direction has been described. However, the opening / closing direction of the opening / closing rod 17 is any direction with respect to the opening portion 23 of the latching main body portion 13. For example, the base end portion 31 is pivotally supported by a substantially horizontal shaft at the opening portion one end 25, and rotates and swings inside the latching main body portion 13 with respect to the opening portion 23. It may be configured to rotate and swing in a direction approaching the grip portion 15 outward of the latching main body portion 13. Even if the opening / closing directions of these opening / closing rods are different, the grip portion 15 is extended in a direction away from the opening portion 23 to make the angle formed with the opening / closing rod 17 an obtuse angle and the latching The innermost part 14 of the main body 13 is a direction substantially orthogonal to the extending direction of the opening / closing rod 17, the depth of the latching main body 13 is long, and the fingers of the operator who grips the grip 15 It is set as the structure which does not interfere with the to-be-suspended bodies 21, such as a support | pillar.

従って、本実施形態に係る安全フック１１によれば、掛止本体部１３が大型化せず、支柱１９のある親綱同士の連結部５７を、掛止したまま容易に通過でき、高所作業であっても安全を確保することができる。 Therefore, according to the safety hook 11 according to the present embodiment, the latch main body 13 does not increase in size, and can easily pass through the coupling portion 57 between the master ropes with the support columns 19 while being hung up. Even so, safety can be ensured.

１１…安全フック
１３…掛止本体部
１５…グリップ部
１７…開閉杆
１９…支柱
２１…親綱（被掛止体）
２３…開放部
２５…開放部一端
２７…ロープ接続部
２９…枢軸
３１…基端部
３３…開放部他端
３５…係合部
３７…先端部
３９…操作片
４１…操作軸
４３…コ字状開口部
４５…コ字状連結部
４７…指掛け部
４９…バネ部材
５１…ロック部 DESCRIPTION OF SYMBOLS 11 ... Safety hook 13 ... Latching main-body part 15 ... Grip part 17 ... Opening / closing hook 19 ... Support | pillar 21 ... Master rope (hung object)
DESCRIPTION OF SYMBOLS 23 ... Opening part 25 ... Opening part one end 27 ... Rope connection part 29 ... Axis 31 ... Base end part 33 ... Opening part other end 35 ... Engagement part 37 ... Tip part 39 ... Operation piece 41 ... Operation shaft 43 ... U-shape Opening 45 ... U-shaped connecting part 47 ... Finger hooking part 49 ... Spring member 51 ... Locking part

Claims

A hook-shaped hooking main body part in which an open part through which a body to be hooked spanned on the upper end of the column passes is downward,
A grip part having a rope connection part at the lower end hanging down in a direction inclining in a direction away from the opening part and being connected to one end of the opening part of the latching main body part sandwiching the opening part;
A base end is rotatably supported around the pivot in the vertical direction at one end of the opening, and is positioned at a predetermined rotational position so that it is formed at the other end of the opening of the latching main body sandwiching the opening. An opening / closing rod that engages a distal end portion with the engaging portion and restricts the vertical disengagement from the engaging portion to close the opening portion;
The base end is sandwiched inside the U-shaped opening, and a pair of U-shaped openings are rotatably supported at one end of the opening around a lateral operation shaft. Position restriction of the heel to the predetermined rotation position and rotation of the finger hook provided on the U-shaped connecting portion in a direction approaching the grip portion, thereby restricting the position of the opening / closing heel to the predetermined rotation position. An operating piece for releasing the safety hook.

The safety hook according to claim 1 ,
The safety hook according to claim 1 , wherein the engaging portion of the latching main body portion is formed in a groove shape that opens in the rotation direction of the tip portion of the opening / closing rod and allows the tip portion to pass therethrough.

The safety hook according to claim 1 or 2 ,
A safety hook, wherein a spring member for biasing the operation piece is provided between the latching main body portion and the operation piece so that the opening / closing rod is in the predetermined rotation position.

The safety hook according to any one of claims 1 to 3 ,
The safety hook according to claim 1, wherein the grip portion is provided with a lock portion that engages and disengages the operation piece to restrict or release the rotation of the operation piece.