JP4727398B2

JP4727398B2 - Buckle for safety belt

Info

Publication number: JP4727398B2
Application number: JP2005341334A
Authority: JP
Inventors: 曉男礒野
Original assignee: TOYO SAFETY INDUSTRIAL CO., LTD.
Current assignee: TOYO SAFETY INDUSTRIAL CO., LTD.
Priority date: 2005-11-28
Filing date: 2005-11-28
Publication date: 2011-07-20
Anticipated expiration: 2025-11-28
Also published as: JP2007143787A

Description

本発明は、高所作業、工事現場等で使用する安全ベルト用の金属製バックル（以下、安全ベルト用バックルという。）の改良に関する。 The present invention relates to an improvement in a metal buckle for a safety belt (hereinafter referred to as a safety belt buckle) that is used at work in a high place, a construction site, or the like.

高所作業や工事現場等で作業者の命綱の役割を果たす安全ベルトに使用する安全ベルト用バックルは、通常のバックルが備える機能性や使用中の大きな負荷に対する耐久性を備えるだけでなく、十分な安全性能を確保することが極めて重要である。 The safety belt buckle used for the safety belt that plays the role of the worker's lifeline at high altitude work or construction site, etc. not only has the functionality that ordinary buckles have and the durability against heavy loads during use It is extremely important to ensure safe safety performance.

上記安全性能を阻害する事象のうち、重大なものとして、外部からの離脱操作レバーへの接触に因り不慮にバックルが解除される不具合がある。当該不具合は、高所において命綱が外れることと変わりなく、大事故に直結する虞がある。 Among the events that hinder the safety performance, a serious problem is that the buckle is inadvertently released due to contact with the release operation lever from the outside. The problem is not different from the loss of lifeline at high altitude, and there is a possibility that it may directly lead to a major accident.

従って、外部からの離脱操作レバーへの接触に因り不慮にバックルが解除される不具合は、確実に防止する必要がある。このような不慮のバックルの解除を防止する発明としては、例えば、バックル本体と、バックル本体に対して係脱されるタングプレートとからなり、前記タングプレートには、ネック部の先端に幅広のヘッド部を連設した挿入部の先端を設け、前記バックル本体には、前記挿入部の先端が挿入されるプレート挿入空間を設け、そのプレート挿入空間の前側開口部における両側部に、前記ヘッド部の後端に対する係合によって挿入部の先端を抜け止めする一対の揺動可能な係合爪を設け、各係合爪の外側部にプレート挿入空間の両側開口から外部に端部が臨む操作片部を連設し、その操作片部の端部がプレート挿入空間の両側開口部に設けられたストッパと当接する方向に係合爪を付勢するばねを設け、前記操作片部の押圧により係合爪を外方向に揺動させて係合爪がヘッド部の後端に係合する状態で操作片部の端部がストッパに当接する状態を維持するようにし、前記係合爪の係合状態で係合爪とタングプレート間に、タングプレートの押込みを可能とする遊びを設け、前記挿入部の先端の両側には前記遊びの範囲でタングプレートが押し込まれたときに係合爪を押圧して係合解除操作ができる位置まで揺動させる押圧部を設けたことを特徴とするバックル（例えば、特許文献１参照。）が公知である。 Therefore, it is necessary to surely prevent a problem that the buckle is unexpectedly released due to contact with the release operation lever from the outside. As an invention for preventing such an inadvertent release of the buckle, for example, it comprises a buckle body and a tongue plate engaged with and disengaged from the buckle body. The tongue plate has a wide head at the tip of the neck portion. A front end of the insertion portion is provided, and the buckle body is provided with a plate insertion space into which the front end of the insertion portion is inserted, and on both sides of the front opening of the plate insertion space, A pair of swingable engaging claws that prevent the distal end of the insertion portion from coming off by engagement with the rear end, and an operating piece portion that faces the outside from both side openings of the plate insertion space on the outer side of each engagement claw And a spring that urges the engaging claw in a direction in which the end of the operation piece comes into contact with the stopper provided in the opening on both sides of the plate insertion space, and is engaged by pressing the operation piece. Nails outward So that the end of the operating piece is in contact with the stopper while the engaging claw is engaged with the rear end of the head, and the engaging claw is engaged with the engaging claw. A play is provided between the tongue plate and the tongue plate to allow the tongue plate to be pushed in. When the tongue plate is pushed in the play range on both sides of the insertion portion, the engagement claw is pushed to release the engagement. A buckle (see, for example, Patent Document 1) characterized in that a pressing portion that swings to a position where it can be operated is provided.

特開２００５−１６０６１１号公報JP 2005-160611 A

上記特許文献１に係るバックルは、バックル本体とタングプレートの結合状態で操作片部の端部がストッパと当接する状態を維持し、操作片部の端部が障害物に対する当接により押されて係合爪が係合解除方向に揺動するのを防止し、上記特許文献１に係るバックルの不具合（不慮にバックルが解除される不具合）を解消する効果を奏するものである。 The buckle according to Patent Document 1 maintains a state in which the end of the operation piece is in contact with the stopper in a coupled state of the buckle body and the tongue plate, and the end of the operation piece is pressed by contact with an obstacle. It is possible to prevent the engaging claw from swinging in the disengagement direction and to solve the problem of the buckle according to Patent Document 1 (the problem that the buckle is unexpectedly released).

しかしながら、プレート挿入空間の両側開口部にストッパを設け、操作片部の端部がストッパに当接する構成としたために、ストッパに対して強い外力が作用して変形すると、操作片部の回動角度が大きくなり、係合爪が十分に作用せず、タングプレートが不慮に抜ける虞がある。また、バックル本体に対するタングプレートの挿入不全及び離脱不全を生じる虞もある。 However, since the stoppers are provided at the openings on both sides of the plate insertion space, and the end of the operation piece abuts against the stopper, the rotation angle of the operation piece when a strong external force acts on the stopper and deforms it. , The engaging claws do not act sufficiently, and the tongue plate may come off accidentally. Moreover, there is a possibility that the tongue plate may not be inserted into or removed from the buckle body.

尚、前記したストッパのいずれかに対して強い外力が作用するという事象は、バックルの係止状態では通常発生し難いとも考えられるが、バックルの離脱状態では操作片部は突出しているため、ベルトと比べて重量の大きいバックルは地面に叩きつけられやすく、強い外力によって突出した操作片部がストッパを押圧変形させる虞がある。 The phenomenon that a strong external force acts on any of the stoppers described above is considered unlikely to occur normally when the buckle is locked, but the operation piece protrudes when the buckle is detached. The buckle which is heavier than that is easily hit against the ground, and there is a possibility that the operation piece protruding by a strong external force may press and deform the stopper.

更に、特許文献１における実施例１として開示されるバックルは、操作片部の端部がストッパと当接する状態を維持するために用いるばねは、タングプレートの押し込みの際の摺動によって側方へ移動され、また操作片部の回動によって大きく湾曲される。ばねの先端の特定箇所に対して複数の方向からの押圧がなされ、また、押し込み操作と操作片部の回動操作は時として同時に行われることもあるから、ばねの消耗は激しく、耐久性に欠ける欠点がある。 Further, in the buckle disclosed as Example 1 in Patent Document 1, the spring used to maintain the state where the end of the operation piece abuts against the stopper is moved sideways by sliding when the tongue plate is pushed. It is moved and is greatly bent by the rotation of the operation piece. The spring tip is pressed from multiple directions, and the push-in operation and the rotation of the operation piece are sometimes performed simultaneously. There are some disadvantages.

また、特許文献１における他の実施例として開示されるバックルは、操作片部をカムとして挿入部の先端の装入で回動する構成であるため、ばねの消耗はある程度抑えることができると考えられる。しかしながら、バックル本体とタングプレートの係合状態において、挿入部の先端が押し込まれた状態では操作片部の端部が外側へ突出して操作片部の係合爪は略外れた状態となる。このため、操作片部の端部を指で解除しなくとも、強い力でタングプレートを離脱方向へ引っ張ると、係合爪とタングプレートの端部側面が相互に摺動して、タングプレートが離脱する虞がある。 Moreover, since the buckle disclosed as another embodiment in Patent Document 1 is configured to rotate by inserting the distal end of the insertion portion using the operation piece portion as a cam, it is considered that the consumption of the spring can be suppressed to some extent. It is done. However, in the engaged state of the buckle body and the tongue plate, when the distal end of the insertion portion is pushed in, the end of the operation piece protrudes outward and the engagement claw of the operation piece is substantially disengaged. For this reason, even if the end of the operation piece is not released with a finger, when the tongue plate is pulled in the direction of disengagement with a strong force, the engaging claw and the end side of the tongue plate slide against each other, and the tongue plate There is a risk of withdrawal.

本発明は、以上の事情に鑑みてなされたものであり、過酷な使用状況下においても十分な耐久性を備え、バックル本体とタングプレートが係合した状態での十分な安全性能を確保することができる優れた安全ベルト用バックルを提供することを、発明が解決しようとする課題とするものである。 The present invention has been made in view of the above circumstances, has sufficient durability even under severe use conditions, and ensures sufficient safety performance with the buckle body and tongue plate engaged. SUMMARY OF THE INVENTION It is an object of the present invention to provide an excellent safety belt buckle.

基板及び側板を有するバックル本体と、該バックル本体に対して係脱可能な挿入部を有するタングプレートと、バックル本体からタングプレートを離脱方向へ付勢するためのばねを備え、前記バックル本体は、ばね付勢され且つ回動によって前記挿入部と係脱可能となる左右一対の操作レバーを備え、操作レバーとタングプレートの係合状態からタングプレートを押し込んで、操作レバーを解除可能とする安全ベルト用バックルにおいて、前記操作レバーは、バックル本体外へ突出する操作端部と、前記ばねが当接するばね当接部と、タングプレートの先端部と噛合可能な噛合爪部を備え、前記タングプレートは、挿入部の先端の形状を左右それぞれに鉤状とした鉤部を形成し、前記ばねは、金属製線材からなり、略直線状の中央部の左右両側に夫々コイル部を形成し、該二つのコイル部の間に夫々湾曲部を形成し、湾曲部で先端側を外方へ曲げ、先端を操作レバーに当接し、前記ばねのコイル部に対して位置決め軸を軸通した構成とし、バックル本体とタングプレートの係合状態で、操作レバーの噛合爪部とタングプレートの鉤部の先端が噛合し、前記ばねの中央部がタングプレートの挿入部の先端を押圧付勢してタングプレート離脱方向の負荷を与え、タングプレートの離脱方向の負荷とばねによる操作レバーの回動によって、タングプレートの鉤部に対して操作レバーの噛合爪部の噛合を確保してタングプレートの離脱を阻止することを特徴とする安全ベルト用バックルを、課題を解決するための手段とする。A buckle body having a substrate and a side plate; a tongue plate having an insertion portion detachable with respect to the buckle body; and a spring for urging the tongue plate from the buckle body in a detaching direction; A safety belt that is provided with a pair of left and right operation levers that are spring-biased and that can be engaged with and disengaged from the insertion portion by rotation, and that can be released by pushing the tongue plate from the engaged state of the operation lever and the tongue plate. In the buckle, the operation lever includes an operation end projecting out of the buckle body, a spring abutting portion with which the spring abuts, and a meshing claw portion that can mesh with a tip end portion of the tongue plate, Forming a flange portion with the shape of the distal end of the insertion portion on the left and right sides, and the spring is made of a metal wire, A coil portion is formed between each of the two coil portions, a bending portion is formed between the two coil portions, the distal end side is bent outwardly at the bending portion, the distal end abuts on the operation lever, and the coil portion of the spring is The positioning shaft is configured to pass through, and in the engaged state of the buckle body and the tongue plate, the engaging claw portion of the operating lever and the tip of the flange portion of the tongue plate are engaged, and the central portion of the spring is the insertion portion of the tongue plate. The tip is pressed and biased to give a load in the tongue plate disengagement direction, and the operation lever meshing claw is engaged with the flange of the tongue plate by the load in the tongue plate disengagement direction and the rotation of the operation lever by the spring. A buckle for a safety belt, which is secured to prevent the tongue plate from being detached, is used as a means for solving the problem.

本発明によれば、基板及び側板を有するバックル本体と、該バックル本体に対して係脱可能な挿入部を有するタングプレートと、バックル本体からタングプレートを離脱方向へ付勢するためのばねを備え、前記バックル本体は、ばね付勢され且つ回動によって前記挿入部と係脱可能となる左右一対の操作レバーを備え、操作レバーとタングプレートの係合状態からタングプレートを押し込んで、操作レバーを解除可能とする安全ベルト用バックルにおいて、前記操作レバーは、バックル本体外へ突出する操作端部と、前記ばねが当接するばね当接部と、タングプレートの先端部と噛合可能な噛合爪部を備え、前記タングプレートは、挿入部の先端の形状を左右それぞれに鉤状とした鉤部を形成し、前記ばねは、金属製線材からなり、略直線状の中央部の左右両側に夫々コイル部を形成し、該二つのコイル部の間に夫々湾曲部を形成し、湾曲部で先端側を外方へ曲げ、先端を操作レバーに当接し、前記ばねのコイル部に対して位置決め軸を軸通した構成とし、バックル本体とタングプレートの係合状態で、操作レバーの噛合爪部とタングプレートの鉤部の先端が噛合し、前記ばねの中央部がタングプレートの挿入部の先端を押圧付勢してタングプレート離脱方向の負荷を与え、タングプレートの離脱方向の負荷とばねによる操作レバーの回動によって、タングプレートの鉤部に対して操作レバーの噛合爪部の噛合を確保したことから、バックル本体とタングプレートの係合状態において、操作レバーはタングプレートとの噛合によって固定されて外力によって不用意に動くことが無く、バックル本体とタングプレートが係合した状態で十分な安全性能を確保することができる。 According to the present invention, there is provided a buckle body having a substrate and a side plate, a tongue plate having an insertion part that can be engaged with and disengaged from the buckle body, and a spring for urging the tongue plate from the buckle body in the disengagement direction. The buckle body is provided with a pair of left and right operation levers that are spring-biased and can be engaged with and disengaged from the insertion portion by rotation, and push the tongue plate from the engaged state of the operation lever and the tongue plate, In the safety belt buckle that can be released, the operation lever includes an operation end projecting out of the buckle body, a spring contact portion that contacts the spring, and a meshing claw portion that can mesh with the tip of the tongue plate. The tongue plate is formed with a flange portion with the shape of the distal end of the insertion portion on the left and right sides, and the spring is made of a metal wire and is substantially linear. A coil portion is formed on each of the left and right sides of the central portion, a curved portion is formed between the two coil portions, the distal end side is bent outward at the curved portion, the distal end abuts on the operation lever, and the spring The positioning shaft is passed through the coil part. When the buckle body and tongue plate are engaged, the engaging claw part of the operating lever and the tip of the flange part of the tongue plate are engaged, and the central part of the spring is the tongue. The tip of the plate insertion part is pressed and biased to apply a load in the tongue plate removal direction, and the lever is engaged with the flange of the tongue plate by the load in the tongue plate removal direction and the rotation of the operation lever by the spring. from what has been secured the meshing of the claws, in the engaged state of the buckle main body and the tongue plate, the operating lever is not able to move unintentionally by an external force is secured by the engagement of the tongue plate It is possible to secure sufficient safety performance in the state in which the buckle main body and the tongue plate is engaged.

また、一時的に不用意にタングプレートが押し込まれても、ばねの中央部の反発弾性によってタングプレートを元の係合位置へ押し戻すとともに、前記ばねの左右の端部が操作レバーを押圧するため、容易にバックル本体とタングプレートが係合した状態を確保することができる。In addition, even if the tongue plate is temporarily inadvertently pushed, the tongue plate is pushed back to the original engagement position by the rebound resilience of the central portion of the spring, and the left and right ends of the spring press the operation lever. The state where the buckle body and the tongue plate are easily engaged can be ensured.

更に、上記ばねの構成によって、ばねの左右の端部は操作レバーと当接し、ばねの中央部が挿入部の先端と当接することで、ばねの各部分に分散して負荷が作用することで、ばねの耐久性を向上させることができる。 In addition, due to the configuration of the spring, the left and right ends of the spring are in contact with the operation lever, and the center of the spring is in contact with the tip of the insertion portion, so that a load is applied to each part of the spring. The durability of the spring can be improved.

また、ばねの構成を、請求項２に係る発明の構成、即ち、ばねはいずれも金属製板材である第一ばね体及び第二ばね体からなり、前記第一ばね体は中央部を正面視山型とし両端は位置決め軸に掛合わす第一湾曲部とし、第二ばね体は、第一ばね体の前記当接部を外方から押圧し、第二ばね体の両端は操作レバーに当接し、タングプレートとバックル本体との係合状態において、前記第一ばね体の中央部が、タングプレートの挿入部の先端を押圧付勢する構成とすることによってタングプレートの押し込みによって、正面視山形に盛り上がって強度を高めた中央部がタングプレートと当接したのち、更なるタングプレートの押し込みによって、第二ばね体の中央部が補助的に第一ばね体を下方から支持するため、第一ばね体の中央部の前記形状と、第二ばねの補助的な支持の相乗効果によって、ばね１５の弾性力を向上することができ、ばね１５全体の連続使用時での耐久性を飛躍的に高めることができる。 Further, the structure of the spring is the structure of the invention according to claim 2, that is, the spring is composed of a first spring body and a second spring body, both of which are metal plates, and the first spring body has a central portion viewed from the front. The two spring bodies press the contact portion of the first spring body from the outside, and both ends of the second spring body abut against the operating lever. In the engaged state between the tongue plate and the buckle body, the central portion of the first spring body is configured to press and urge the tip of the insertion portion of the tongue plate, thereby pushing the tongue plate into a mountain shape when viewed from the front. After the raised and strengthened central part comes into contact with the tongue plate, the central part of the second spring body supplementarily supports the first spring body from below by further pressing the tongue plate. The shape of the center of the body , By the synergistic effect of the auxiliary support of the second spring, the spring 15 elasticity can be improved, and the durability in continuous use of the entire spring 15 can be increased remarkably.

基板及び側板を有するバックル本体と、該バックル本体に対して係脱可能な挿入部を有するタングプレートと、バックル本体からタングプレートを離脱方向へ付勢するためのばねを備え、前記バックル本体は、ばね付勢され且つ回動によって前記挿入部と係脱可能となる左右一対の操作レバーを備え、操作レバーとタングプレートの係合状態からタングプレートを押し込んで、操作レバーを解除可能とする安全ベルト用バックルにおいて、前記操作レバーは、バックル本体外へ突出する操作端部と、前記ばねが当接するばね当接部と、タングプレートの先端部と噛合可能な噛合爪部を備え、前記タングプレートは、挿入部の先端の形状を左右それぞれに鉤状とした鉤部を形成し、前記ばねは、金属製線材からなり、略直線状の中央部の左右両側に夫々コイル部を形成し、該二つのコイル部の間に夫々湾曲部を形成し、湾曲部で先端側を外方へ曲げ、先端を操作レバーに当接し、前記ばねのコイル部に対して位置決め軸を軸通した構成とし、バックル本体とタングプレートの係合状態で、操作レバーの噛合爪部とタングプレートの鉤部の先端が噛合し、前記ばねの中央部がタングプレートの挿入部の先端を押圧付勢してタングプレート離脱方向の負荷を与え、タングプレートの離脱方向の負荷とばねによる操作レバーの回動によって、タングプレートの鉤部に対して操作レバーの噛合爪部の噛合を確保してタングプレートの離脱を阻止することを特徴とする安全ベルト用バックルとしたことによって、バックル本体に強い外力を受けた場合であっても、ストッパの変形によるタングプレートの不慮の離脱、挿入不全、離脱不全を生じることが無く、バックル本体とタングプレートが係合した状態での極めて高い安全性能を発揮することができる安全ベルト用バックルを実現した。 A buckle body having a substrate and a side plate; a tongue plate having an insertion portion detachable with respect to the buckle body; and a spring for urging the tongue plate from the buckle body in a detaching direction; A safety belt that is provided with a pair of left and right operation levers that are spring-biased and that can be engaged with and disengaged from the insertion portion by rotation, and that can be released by pushing the tongue plate from the engaged state of the operation lever and the tongue plate. In the buckle, the operation lever includes an operation end projecting out of the buckle body, a spring abutting portion with which the spring abuts, and a meshing claw portion that can mesh with a tip end portion of the tongue plate, Forming a flange portion with the shape of the distal end of the insertion portion on the left and right sides, and the spring is made of a metal wire, A coil portion is formed between each of the two coil portions, a bending portion is formed between the two coil portions, the distal end side is bent outwardly at the bending portion, the distal end abuts on the operation lever, and the coil portion of the spring is The positioning shaft is configured to pass through, and in the engaged state of the buckle body and the tongue plate, the engaging claw portion of the operating lever and the tip of the flange portion of the tongue plate are engaged, and the central portion of the spring is the insertion portion of the tongue plate. The tip is pressed and biased to give a load in the tongue plate disengagement direction, and the operation lever meshing claw is engaged with the flange of the tongue plate by the load in the tongue plate disengagement direction and the rotation of the operation lever by the spring. by the safety belt buckle, characterized in that to prevent the detachment of the tongue plate to ensure, even when subjected to strong external force to the buckle body, Tangupu by deformation of the stopper Accidental detachment of over preparative insertion failure, without causing disengagement failure, buckle main body and the tongue plate is achieved safety belt buckle which can exhibit a very high safety performance in engagement.

（実施例１）
本発明の実施例１を示す各図について説明する。図１は本発明の実施例１に係るバックルの係合状態を示す正面図、図２は同実施例１に係るバックルを示す背面図、図３は同実施例１に係るバックルを示す右側面図、図４は同実施例１に係るバックルを示すＡ−Ａ断面図、図５は本発明の実施例１に係るバックル本体を示す正面図、図６は同実施例１に係るバックル本体１を示す背面図、図７は同実施例１に係るバックル本体を示す右側面図及びＢ−Ｂ断面図、図８は本発明の実施例１に係るタングプレートを示す正面図、図９は同実施例１に係るタングプレートを示す背面図、図１０は同実施例１に係るタングプレートを示す右側面図及びＣ−Ｃ断面図、図１１は本発明の実施例１に係る基板を除いたバックル本体とタングプレートとの係合状態を示す説明図及びその一部拡大図、図１２は同実施例１に係る基板を除いたバックル本体に対してタングプレートを押し込んだ状態を示す説明図、図１３は同実施例１に係る基板を除いたバックル本体とタングプレートとを離脱可能とした状態を示す説明図、図１４は同実施例１に係るバックルをベルトに取付けた状態を示す説明図である。 (Example 1)
Each figure which shows Example 1 of this invention is demonstrated. 1 is a front view showing an engaged state of a buckle according to a first embodiment of the present invention, FIG. 2 is a rear view showing the buckle according to the first embodiment, and FIG. 3 is a right side view showing the buckle according to the first embodiment. 4 is a cross-sectional view taken along line AA showing the buckle according to the first embodiment, FIG. 5 is a front view showing the buckle body according to the first embodiment of the present invention, and FIG. 6 is the buckle body 1 according to the first embodiment. FIG. 7 is a right side view showing the buckle body according to the first embodiment and a BB cross-sectional view, FIG. 8 is a front view showing a tongue plate according to the first embodiment of the present invention, and FIG. 10 is a rear view showing the tongue plate according to the first embodiment, FIG. 10 is a right side view showing the tongue plate according to the first embodiment, and a cross-sectional view taken along the line CC, and FIG. 11 is a diagram excluding the substrate according to the first embodiment of the present invention. FIG. 12 is an explanatory view showing an engagement state between the buckle body and the tongue plate, and a partially enlarged view thereof. Explanatory drawing which shows the state which pushed the tongue plate with respect to the buckle main body except the board | substrate which concerns on the same Example 1, FIG. 13 made it possible to detach | separate the buckle main body and the tongue plate except the board | substrate concerning the same Example 1. FIG. FIG. 14 is an explanatory view showing a state in which the buckle according to the first embodiment is attached to the belt.

本発明の実施例１に係る安全ベルトバックルは、図１乃至図４に示すように、ステンレス製バックル本体１と、該バックル本体１に対して係脱可能なステンレス製のタングプレート２とからなる。 The safety belt buckle according to the first embodiment of the present invention includes a stainless steel buckle body 1 and a stainless steel tongue plate 2 that can be attached to and detached from the buckle body 1 as shown in FIGS. .

本実施例１に係るバックル本体１は、図５乃至図７に示すように、主として、基板１２と、厚さ２ミリメートル程度の挟持板１３と、板状を有する二枚の操作レバー１４と、ばね１５を備えている。 As shown in FIGS. 5 to 7, the buckle body 1 according to the first embodiment mainly includes a substrate 12, a sandwiching plate 13 having a thickness of about 2 millimeters, two operation levers 14 having a plate shape, A spring 15 is provided.

前記二枚の操作レバー１４とばね１５は、前記基板１２と挟持板１３との間に挟まれて配置されている。また、操作レバー１４の回動軸１４３は、基板１２、操作レバー１４、挟持板１３を連通固定している。ばね１５を位置決めするための位置決め軸１５３は、基板１２、後記ばねのコイル１５２、挟持板１３までを連通した状態としている。本実施例１では、前記回動軸１４３及び位置決め軸１５３は、いずれもカシメピンを利用している。 The two operating levers 14 and the spring 15 are disposed between the substrate 12 and the sandwiching plate 13. Further, the rotation shaft 143 of the operation lever 14 communicates and fixes the substrate 12, the operation lever 14, and the clamping plate 13. The positioning shaft 153 for positioning the spring 15 is in a state where the substrate 12, the coil 152 of the spring described later, and the sandwiching plate 13 are communicated. In the first embodiment, the rotating shaft 143 and the positioning shaft 153 both use caulking pins.

本実施例１における基板１２は、後端側縁部を略垂直に折曲起立して後壁部１２０を形成している。後壁部１２０の上端には、挟持板１３の後記嵌合用凹部１３０と嵌合する嵌合用凸部１２３を設けている。 In the substrate 12 according to the first embodiment, the rear end side edge is bent and raised substantially vertically to form the rear wall 120. At the upper end of the rear wall portion 120, a fitting convex portion 123 that fits with the fitting concave portion 130 to be described later is provided.

一方、基板１２における前端側には、タングプレート２の挿入時にタングプレート２の挿入部２０ｂの先端を案内するためのガイド用溝１２１を形成している。また、基板１２上に配置される操作レバー１４の回動位置に対応して、該基板１２上に回動規制突起１２２を形成している。 On the other hand, a guide groove 121 is formed on the front end side of the substrate 12 for guiding the tip of the insertion portion 20b of the tongue plate 2 when the tongue plate 2 is inserted. Further, a rotation restricting protrusion 122 is formed on the substrate 12 corresponding to the rotation position of the operation lever 14 disposed on the substrate 12.

次に、挟持板１３は、厚さ２ミリメートル程度のステンレス製の天板１３０と該天板１３０の左右側面にプレス成型によって略垂直に折曲して一体に形成される側板１３１を備える。天板１３０の後端側にはベルト３を連結するための第一ベルト連結用穴１３２を設けている。 Next, the sandwiching plate 13 includes a stainless steel top plate 130 having a thickness of about 2 millimeters and side plates 131 that are integrally formed by bending the left and right side surfaces of the top plate 130 substantially vertically by press molding. A first belt connecting hole 132 for connecting the belt 3 is provided on the rear end side of the top plate 130.

また、前記第一ベルト連結用穴１３２の縁部のうち前方側には、第一ベルト連結用穴１３２と連続する嵌合用凹部１３３を形成している。天板１３０は、基板１２におけるガイド用溝１２１に相当する部位を備えずに、平板形状部１２４を形成している。 A fitting recess 133 that is continuous with the first belt connection hole 132 is formed on the front side of the edge of the first belt connection hole 132. The top plate 130 does not include a portion corresponding to the guide groove 121 in the substrate 12, and forms a flat plate-shaped portion 124.

操作レバー１４は、略中央には回動軸１４３が軸通する軸穴を有するとともに、バックル本体１外へ突出する操作端部１４０と、前記回動規制突起１２２との当接部位となる内部規制縁部１４１と、タングプレート２の後記鉤部２０２が係合する噛合爪部１４２と、ばね１５の後記端部１５１と当接するばね当接部１４４と、タングプレート２の後記挿入部２０ｂの挿入部側面２０５と当接可能な挿入部側面当接部１４５を備えた構成である。 The operation lever 14 has a shaft hole through which the rotation shaft 143 passes in the approximate center, and an inner portion that serves as a contact portion between the operation end 140 that protrudes outside the buckle body 1 and the rotation restriction projection 122. The restricting edge portion 141, the engaging claw portion 142 with which the postscript portion 202 of the tongue plate 2 is engaged, the spring contact portion 144 with which the postscript end portion 151 of the spring 15 is brought into contact, and the post plate insertion portion 20b of the tongue plate 2 This is a configuration including an insertion portion side surface abutting portion 145 that can abut on the insertion portion side surface 205.

ばね１５は、金属製線材からなり、略直線状の中央部１５０の左右両側に夫々コイル１５２を形成し、該二つのコイル１５２の間に夫々湾曲部１５４を形成し、湾曲部１５４で先端側を外方へ向けて曲げ、先端を僅かに内側へ屈曲させて、操作レバー１４のばね当接部１４４に対する当接部１５５を形成した構成とし、前記ばね１５のコイル部１５２に対して位置決め軸を軸通した構成としたものである。 The spring 15 is made of a metal wire material, and coils 152 are formed on the left and right sides of the substantially straight central portion 150, respectively, and a curved portion 154 is formed between the two coils 152. Is bent outward and the tip is bent slightly inward to form a contact portion 155 with respect to the spring contact portion 144 of the operating lever 14, and a positioning shaft for the coil portion 152 of the spring 15 is formed. It is set as the structure which passed through.

本実施例１に係るタングプレート２は、タングプレート本体２０とベルト固定金具２１とからなる。タングプレート本体２０は側壁２０４を有し、後端（ベルト連結端）側には、長穴状の第二ベルト連結用穴２００とベルト固定金具取付穴２０１を併設している。ベルト固定金具２１は、ベルト固定金具取付穴２０１に嵌め込んであり、第二ベルト連結用穴を開閉可能として側壁２０４にガイドされて前後へスライドする。 The tongue plate 2 according to the first embodiment includes a tongue plate body 20 and a belt fixing bracket 21. The tongue plate main body 20 has a side wall 204, and a long hole-like second belt connecting hole 200 and a belt fixing bracket mounting hole 201 are provided on the rear end (belt connecting end) side. The belt fixing metal fitting 21 is fitted in the belt fixing metal fitting mounting hole 201 and slides back and forth while being guided by the side wall 204 so that the second belt connecting hole can be opened and closed.

実施例１に係るタングプレート本体２０は、前記第二ベルト連結用穴２００及びベルト固定金具取付穴２０１を併設した枠部２０ａと、該枠部２０ａの前方中央から延設される挿入部２０ｂとからなる。挿入部２０ｂの基端から中央に至るにつれ挿入部２０ｂの幅は狭くなっている。挿入部２０ｂの先端は左右両側へ鉤部２０２を形成しているため、広幅に形成される。当該構成によって、タングプレート本体２０は非常に薄手として形成している。また、挿入部２０ｂの挿入部側面２０５は、前記操作レバー１４の挿入部側面当接部１４５と当接可能である。尚、本実施例１においては、枠部２０ａに対して挿入部２０ｂは相対的に傾斜して、着用者の体にフィットし易い形状としている。 The tongue plate body 20 according to the first embodiment includes a frame portion 20a provided with the second belt connecting hole 200 and the belt fixing bracket mounting hole 201, and an insertion portion 20b extending from the front center of the frame portion 20a. Consists of. The width of the insertion portion 20b becomes narrower from the proximal end of the insertion portion 20b to the center. The distal end of the insertion portion 20b is formed wide because the flange portion 202 is formed on both the left and right sides. With this configuration, the tongue plate body 20 is formed very thin. Further, the insertion portion side surface 205 of the insertion portion 20 b can contact the insertion portion side surface contact portion 145 of the operation lever 14. In the first embodiment, the insertion portion 20b is relatively inclined with respect to the frame portion 20a so as to easily fit the wearer's body.

また、タングプレート本体２０の挿入部２０ｂの基端には、プレス加工により、下方へ突出するガイド用突起２０３を形成している。ガイド用突起２０３は、バックル本体１とタングプレート２との係合時に、ガイド用溝１２１と摺動することで、前記係合の迅速性、正確性を確保する。 Further, a guide protrusion 203 protruding downward is formed at the base end of the insertion portion 20b of the tongue plate main body 20 by pressing. The guide protrusion 203 slides with the guide groove 121 when the buckle body 1 and the tongue plate 2 are engaged, thereby ensuring the speed and accuracy of the engagement.

ベルト固定金具は、前記したように、ベルト固定金具取付穴２０１に嵌め込んで、第二ベルト連結用穴を開閉可能として前後へスライドするものである。該ベルト固定金具は短手方向断面視コの字状を有する。正面に露呈する側の端部には長手方向に沿って波型のベルト押圧部２１０を形成している。 As described above, the belt fixing bracket is fitted into the belt fixing bracket mounting hole 201 and slides back and forth so that the second belt connecting hole can be opened and closed. The belt fixing bracket has a U-shaped cross-sectional view. A corrugated belt pressing portion 210 is formed along the longitudinal direction at the end on the side exposed to the front.

以上の構成を有するバックル本体１とタングプレート２との関係について、相互の係合状態から解除状態に至る構成を、図１１乃至図１３に示すとともに説明する。 With respect to the relationship between the buckle body 1 and the tongue plate 2 having the above-described configuration, the configuration from the mutually engaged state to the released state will be described with reference to FIGS. 11 to 13.

係合状態においては、図１１に示すように、バックル本体１の側部から操作レバー１４の端部が張り出す状態となる。そして、鉤部２０２と操作レバー１４の噛合爪部１４２とが噛合している。また、ばね１５の両端部１５１は、操作レバー１４のばね当接部１４４に当接し、ばね１５の中央がタングプレート２の挿入部２０ｂの先端と当接する。ばね１５の両端部１５１は、操作レバー１４を中央のタングプレート２に向けて付勢する。 In the engaged state, as shown in FIG. 11, the end portion of the operation lever 14 protrudes from the side portion of the buckle body 1. And the collar part 202 and the meshing claw part 142 of the operation lever 14 are meshed. Further, both end portions 151 of the spring 15 are in contact with the spring contact portion 144 of the operation lever 14, and the center of the spring 15 is in contact with the tip of the insertion portion 20 b of the tongue plate 2. Both end portions 151 of the spring 15 urges the operation lever 14 toward the central tongue plate 2.

また、ばねの中央は、タングプレート離脱方向へ付勢する。これらの付勢によって、鉤部２０２と操作レバー１４の噛合爪部１４２との噛合はより強固に結合している。この結合状態は非常に強固なため、操作レバー１４の端部に外力が作用しても、タングプレート２を押し込む方向にも、タングプレート２と操作レバー１４の係合を解除する方向にも回動しない。尚、この係合状態では、回動規制突起１２２と操作レバー１４の内部規制縁部１４１とは当接していない。 Further, the center of the spring is biased in the direction of detachment of the tongue plate. By these urgings, the engagement between the flange portion 202 and the engagement claw portion 142 of the operation lever 14 is more firmly coupled. Since this coupling state is very strong, even if an external force acts on the end of the operation lever 14, in a direction to push the tongue plate 2, in a direction to release the engagement of the tongue plate 2 and the operation lever 14 times Does not move. In this engaged state, the rotation restricting protrusion 122 and the inner restricting edge portion 141 of the operation lever 14 are not in contact with each other.

また、係合状態において、不用意にタングプレート２を離脱する方向（図１１中の矢印Ｆで示す）に力が加わったときには、当該タングプレート２を離脱する方向の負荷によって、操作レバー１４の噛合爪部１４２と鉤部２０２が強く噛み合い、操作レバーの僅かな回動によって操作レバー１４の挿入部側面当接部１４５とタングプレート２の挿入部２０ｂにおける挿入部側面２０５とを当接させる合力（図１１中の矢印Ｄで示す）が生じ、前記噛合爪部１４２が鉤部２０２と挿入部側面２０５で噛み込む状態となり、極めて強固な結合状態を構成する。 Further, in the engaged state, when a force is applied in a direction in which the tongue plate 2 is carelessly detached (indicated by an arrow F in FIG. 11), the load of the direction in which the tongue plate 2 is detached is caused by the load of the operation lever 14. The engaging claw 142 and the flange 202 are in strong engagement, and the resultant force that abuts the insertion portion side surface contact portion 145 of the operation lever 14 and the insertion portion side surface 205 of the insertion portion 20b of the tongue plate 2 by slight rotation of the operation lever. (Indicated by an arrow D in FIG. 11) occurs, and the engagement claw 142 is engaged with the flange 202 and the insertion portion side surface 205, thereby forming a very strong combined state.

バックル本体１からタングプレート２を離脱するには、図１２に示すタングプレートの押し込み操作、図１３に示す操作レバー回動操作を行うことで、可能となる。
先ず、図１２に示すように、バックル本体１に対してタングプレート２を押し込む。この段階で操作レバー１４の操作が可能となる。 The tongue plate 2 can be detached from the buckle body 1 by performing a pushing operation of the tongue plate shown in FIG. 12 and an operation lever rotating operation shown in FIG.
First, as shown in FIG. 12, the tongue plate 2 is pushed into the buckle body 1. At this stage, the operation lever 14 can be operated.

このタングプレート２の押し込み操作によって、操作レバー１４の噛合爪部１４２と鉤部２０２の噛合が解除される。そして、ばね１５の中央部１５０がタングプレート２の挿入部２０ｂの先端に押圧され、ばね１５の中央部１５０はタングプレート２に対して反発弾性力を生ずる。 By the pushing operation of the tongue plate 2, the meshing between the meshing claw 142 of the operation lever 14 and the collar 202 is released. Then, the central portion 150 of the spring 15 is pressed against the tip of the insertion portion 20 b of the tongue plate 2, and the central portion 150 of the spring 15 generates a repulsive elastic force against the tongue plate 2.

また、タングプレート２の押し込みに伴って挿入部２０ｂの挿入部側面２０５と操作レバー１４の挿入部側面当接部１４５とが接触して、操作レバー１４がばね付勢方向と反対の方向に僅かに回動する。操作レバー１４の僅かな回動はばね１５の端部１５１を押圧するため、ばね１５の端部１５１は操作レバー１４に対してより大きな反発弾性力を生ずる。 Further, as the tongue plate 2 is pushed, the insertion portion side surface 205 of the insertion portion 20b comes into contact with the insertion portion side surface contact portion 145 of the operation lever 14, and the operation lever 14 is slightly in the direction opposite to the spring biasing direction. To turn. Since the slight rotation of the operation lever 14 presses the end portion 151 of the spring 15, the end portion 151 of the spring 15 generates a larger repulsive elastic force on the operation lever 14.

尚、この段階で不慮にベルト３が外方へ強く引っ張られると、左右に大きく張り出した鉤部２０２が操作レバー１４に当たり、タングプレート２の不慮の離脱を阻止する。そして、この左右に大きく張り出した鉤部２０２が暫く操作レバー１４に当接することで、その間に操作レバー１４はばね付勢によって、鉤部２０２との係合可能な位置へ復帰し、再度鉤部２０２と操作レバー１４とが係合状態となり、確実な係合状態を確保することができる。 If the belt 3 is unexpectedly strongly pulled outward at this stage, the flange portion 202 protruding greatly to the left and right hits the operating lever 14 and prevents the tongue plate 2 from being accidentally detached. Then, the collar portion 202 that protrudes to the left and right abuts against the operation lever 14 for a while, so that the operation lever 14 is returned to a position where it can be engaged with the collar portion 202 due to the spring bias. 202 and the operating lever 14 are brought into an engaged state, and a reliable engaged state can be ensured.

次に、操作レバー１４の回動操作を行う。左右の操作レバー１４をばね１５の端部１５１の付勢に抗して回動させる（図１３中の矢印Ｅで示す）と、左右の操作レバー１４間にタングプレート２の挿入部２０ｂが離脱可能となる空間１１が形成され、バックル本体１からタングプレート２を引き抜くことができる。 Next, the operation lever 14 is rotated. When the left and right operation levers 14 are rotated against the bias of the end portion 151 of the spring 15 (indicated by the arrow E in FIG. 13), the insertion portion 20b of the tongue plate 2 is detached between the left and right operation levers 14. A possible space 11 is formed, and the tongue plate 2 can be pulled out from the buckle body 1.

タングプレート２を引き抜いた後に回動規制突起１２２が操作レバー１４の内部規制縁部１４１と当接し、タングプレート２を引き抜いた後の操作レバー１４の過度の回転によって、ばね１５が外れることを防止する。 After the tongue plate 2 is pulled out, the rotation restricting projection 122 abuts against the inner restricting edge portion 141 of the operation lever 14, and the spring 15 is prevented from being released due to excessive rotation of the operation lever 14 after the tongue plate 2 is pulled out. To do.

尚、本実施例１に係る安全ベルト用バックルは、ベルト固定金具２１を短手方向断面視コの字状として、正面に露呈する側の端部には長手方向に沿って波型のベルト押圧部２１０を形成したことから、第二ベルト連結用穴２００内を通したベルト３に対してベルト固定金具取付穴２０１をスライドさせることで、ベルト固定金具２１がタングプレート２とともにベルト３を挟み込み、ベルト押圧部２１０がベルト３に食い込むように押圧することとなり、ベルト３を極めて強固に連結することができ、安全ベルト用バックルとしての機能を極めて高いものとすることができる。 The buckle for a safety belt according to the first embodiment has a U-shaped belt fixing bracket 21 in a short cross-sectional view, and a corrugated belt press along the longitudinal direction at the end portion exposed to the front. Since the portion 210 is formed, the belt fixing bracket 21 sandwiches the belt 3 together with the tongue plate 2 by sliding the belt fixing bracket mounting hole 201 with respect to the belt 3 passing through the second belt connecting hole 200. The belt pressing portion 210 presses the belt 3 so as to bite into the belt 3, and the belt 3 can be connected extremely firmly, so that the function as a safety belt buckle can be made extremely high.

また、本実施例１における安全ベルト用バックルは、挟持板１３における天板１３０が、基板１２におけるガイド用溝１２１に相当する部位を備えずに平板形状としたことによって、係合状態のバックルに対してタングプレート２が折り曲がるように強い外力が作用した場合でも、タングプレート２に対する負荷を平板形状部１２４全体で受けることができることから、タングプレート２の挿入部２０ｂの先端が変形してバックル本体１から外れることがなく、バックルの不慮の離脱を阻止することができる。 In addition, the safety belt buckle according to the first embodiment has a flat plate shape in which the top plate 130 of the sandwiching plate 13 does not include a portion corresponding to the guide groove 121 of the substrate 12. Even when a strong external force is applied so that the tongue plate 2 bends, the load on the tongue plate 2 can be received by the entire flat plate-shaped portion 124, so that the tip of the insertion portion 20b of the tongue plate 2 is deformed and buckles. It is possible to prevent unintentional detachment of the buckle without being detached from the main body 1.

更に、本実施例１における安全ベルト用バックルは、金属板に対するプレス加工によってその殆どを形成することができることから、非常に安価で、薄手の安全ベルト用バックルとすることができる。 Furthermore, since most of the safety belt buckle in the first embodiment can be formed by pressing a metal plate, the safety belt buckle is very inexpensive and can be a thin safety belt buckle.

（実施例２）
次に、本発明の実施例２を示す各図について説明する。図１５は本発明の実施例２に係るばねを示す正面図、図１６は本発明の実施例２に係る基板を除いたバックル本体とタングプレートとの係合状態を示す説明図及びその一部拡大図、図１７は同実施例２に係る基板を除いたバックル本体に対してタングプレートを押し込んだ状態を示す説明図、図１８は同実施例２に係る基板を除いたバックル本体とタングプレートとを離脱可能とした状態を示す説明図である。 (Example 2)
Next, each figure which shows Example 2 of this invention is demonstrated. FIG. 15 is a front view showing a spring according to the second embodiment of the present invention, and FIG. 16 is an explanatory view showing an engagement state between the buckle body and the tongue plate excluding the substrate according to the second embodiment of the present invention, and a part thereof. FIG. 17 is an explanatory view showing a state where the tongue plate is pushed into the buckle body excluding the substrate according to the second embodiment, and FIG. 18 is a view showing the buckle body and tongue plate excluding the substrate according to the second embodiment. It is explanatory drawing which shows the state which made detachable.

本実施例２に係るバックルは、実施例１と外観上の構成は略同様のものであり、ばね１５の構成についてのみ変更したものである。即ち、バックル本体１の基板１２、挟持板１３、板状を有する二枚の操作レバー１４、及び、タングプレート２（タングプレート本体２０とベルト固定金具２１）については、実施例１と同一部品を用い、実施例１と同一の組み合わせによって、バックル本体１及びタングプレート２を構成するものである。 The buckle according to the second embodiment is substantially the same in external appearance as that of the first embodiment, and only the configuration of the spring 15 is changed. That is, the same components as those in the first embodiment are used for the substrate 12 of the buckle body 1, the sandwiching plate 13, the two operation levers 14 having a plate shape, and the tongue plate 2 (the tongue plate body 20 and the belt fixing bracket 21). The buckle body 1 and the tongue plate 2 are configured by using the same combination as in the first embodiment.

そして、本実施例２に係るバックルにおけるばね１５は、図１５に示すように、第一ばね体１５Ａと第二ばね体１５Ｂの二つの金属製板材を組み合わせて構成する。第一ばね体１５Ａは、中央部１５０Ａを正面視山型とし両端は位置決め軸に掛合わす第一湾曲部１５４Ａとする。また、第二ばね体１５Ｂは、略直線状の中央部１５０Ｂの左右両側に夫々第二湾曲部１５４Ｂを形成している。第一ばね体１５Ａの第一湾曲部１５４Ａの外面が、第二ばね体１５Ｂの左右の第二湾曲部１５４Ｂ、１５４Ｂの内側に当接し、平面視において第二ばね体の左右先端である当接部１５５、１５５の間に第一ばね体１５Ａの中央部１５０Ａが位置する。 And the spring 15 in the buckle which concerns on the present Example 2 is comprised combining two metal board | plate materials, 15A of 1st spring bodies, and the 2nd spring body 15B, as shown in FIG. The first spring body 15A is a first curved portion 154A in which the central portion 150A has a mountain shape when viewed from the front, and both ends are engaged with the positioning shaft. Further, the second spring body 15B forms second curved portions 154B on the left and right sides of the substantially straight central portion 150B. The outer surface of the first curved portion 154A of the first spring body 15A is in contact with the inner sides of the left and right second curved portions 154B and 154B of the second spring body 15B, and is a contact that is the left and right ends of the second spring body in plan view. The central portion 150A of the first spring body 15A is located between the portions 155 and 155.

当該構成によって、図１６に示すように、第一ばね体は左右外側から第二ばね体で押さえ込まれた状態となり、第一ばね体の中央部には上方向きの付勢力が作用する。このため、タングプレート２とバックル本体１との係合状態において、前記第一ばね体１５Ａの中央部１５０Ａが、タングプレート２の挿入部２０ｂの先端を押圧付勢することとなる。 With this configuration, as shown in FIG. 16, the first spring body is pressed by the second spring body from the left and right outer sides, and an upward biasing force acts on the central portion of the first spring body. For this reason, in the engaged state of the tongue plate 2 and the buckle body 1, the central portion 150 </ b> A of the first spring body 15 </ b> A presses and urges the distal end of the insertion portion 20 b of the tongue plate 2.

そして、図１７に示すように、本実施例２においては、タングプレート２の押し込み操作によって、正面視山形となった中央部１５０Ａがタングプレート２と当接したのち、更なるタングプレート２の押し込みによって、第二ばね体の中央部が補助的に第一ばね体１５Ａを下方から支持し、ばね１５全体の強度を保持する。そして、図１８に示すように、実施例１と同様に、操作レバーを操作することで、空間１１を形成し、バックル本体１とタングプレート２とを離脱可能な状態とすることができる。 As shown in FIG. 17, in the second embodiment, after the tongue plate 2 is pushed, the central portion 150 </ b> A having a mountain shape in front view comes into contact with the tongue plate 2, and then the tongue plate 2 is pushed further. Thus, the central portion of the second spring body supplementarily supports the first spring body 15A from below and maintains the strength of the entire spring 15. Then, as shown in FIG. 18, as in the first embodiment, by operating the operation lever, the space 11 can be formed and the buckle body 1 and the tongue plate 2 can be detached.

以上のように、実施例２に係るバックルにおいては、上記実施例１に係るバックルの優れた効果を得ることができることに加え、更にばね１５の強度を高めることができる点で優れるものである。 As described above, the buckle according to the second embodiment is excellent in that the strength of the spring 15 can be further increased in addition to obtaining the excellent effect of the buckle according to the first embodiment.

本発明の実施例１に係るバックルの係合状態を示す正面図である。It is a front view which shows the engagement state of the buckle which concerns on Example 1 of this invention. 本発明の実施例１に係るバックルの係合状態を示す背面図である。It is a rear view which shows the engagement state of the buckle which concerns on Example 1 of this invention. 本発明の実施例１に係るバックルの係合状態を示す右側面図である。It is a right view which shows the engagement state of the buckle which concerns on Example 1 of this invention. 本発明の実施例１に係るバックルの係合状態を示すＡ−Ａ断面図である。It is AA sectional drawing which shows the engagement state of the buckle which concerns on Example 1 of this invention. 本発明の実施例１に係るバックル本体を示す正面図である。It is a front view which shows the buckle main body which concerns on Example 1 of this invention. 本発明の実施例１に係るバックル本体を示す背面図である。It is a rear view which shows the buckle main body which concerns on Example 1 of this invention. 本発明の実施例１に係るバックル本体を示す右側面図及びＢ−Ｂ断面図である。It is the right view and BB sectional drawing which show the buckle main body which concerns on Example 1 of this invention. 本発明の実施例１に係るタングプレートを示す正面図である。It is a front view which shows the tongue plate which concerns on Example 1 of this invention. 本発明の実施例１に係るタングプレートを示す背面図である。It is a rear view which shows the tongue plate which concerns on Example 1 of this invention. 本発明の実施例１に係るタングプレートを示す右側面図及びＣ−Ｃ断面図である。It is the right view and CC sectional drawing which show the tongue plate which concerns on Example 1 of this invention. 本発明の実施例１に係る基板を除いたバックル本体とタングプレートとの係合状態を示す説明図及びその一部拡大図である。It is explanatory drawing which shows the engagement state of the buckle main body and tongue plate except the board | substrate which concerns on Example 1 of this invention, and its partially expanded view. 本発明の実施例１に係る基板を除いたバックル本体に対してタングプレートを押し込んだ状態を示す説明図である。It is explanatory drawing which shows the state which pushed the tongue plate with respect to the buckle main body except the board | substrate which concerns on Example 1 of this invention. 本発明の実施例１に係る基板を除いたバックル本体とタングプレートとを離脱可能とした状態を示す説明図である。It is explanatory drawing which shows the state which made the buckle main body and tongue plate except the board | substrate concerning Example 1 of this invention removable. 本発明の実施例１に係るバックルをベルトに取り付けた状態を示す説明図である。It is explanatory drawing which shows the state which attached the buckle which concerns on Example 1 of this invention to the belt. 本発明の実施例２に係るばねを示す正面図である。It is a front view which shows the spring which concerns on Example 2 of this invention. 本発明の実施例２に係る基板を除いたバックル本体とタングプレートとの係合状態を示す説明図及びその一部拡大図である。It is explanatory drawing which shows the engagement state of the buckle main body and tongue plate except the board | substrate which concerns on Example 2 of this invention, and its partially expanded view. 本発明の実施例２に係る基板を除いたバックル本体に対してタングプレートを押し込んだ状態を示す説明図である。It is explanatory drawing which shows the state which pushed the tongue plate with respect to the buckle main body except the board | substrate which concerns on Example 2 of this invention. 本発明の実施例２に係る基板を除いたバックル本体とタングプレートとを離脱可能とした状態を示す説明図である。It is explanatory drawing which shows the state which made the buckle main body and tongue plate except the board | substrate concerning Example 2 of this invention removable.

１バックル本体
１１空間
１２基板
１２０後壁部
１２１ガイド用溝
１２２回動規制突起
１２３嵌合用凸部
１２４平板形状部
１３挟持板
１３０天板
１３１側板
１３２第一ベルト連結用穴
１３３嵌合用凹部
１４操作レバー
１４０操作端部
１４１内部規制縁部
１４２噛合爪部
１４３回動軸
１４４ばね当接部
１４５挿入部側面当接部
１５ばね
１５Ａ第一ばね体
１５Ｂ第二ばね体
１５０中央部
１５０Ａ中央部（実施例２）
１５０Ｂ中央部（実施例２）
１５１端部
１５２コイル
１５３位置決め軸
１５４湾曲部
１５４Ａ第一湾曲部（実施例２）
１５４Ｂ第二湾曲部（実施例２）
１５５当接部
２タングプレート
２０タングプレート本体
２０ａ枠部
２０ｂ挿入部
２００第二ベルト連結用穴
２０１ベルト固定金具取付穴
２０２鉤部
２０３ガイド用突起
２０４側壁
２０５挿入部側面
２１ベルト固定金具
２１０ベルト押圧部
３ベルト DESCRIPTION OF SYMBOLS 1 Buckle main body 11 Space 12 Board | substrate 120 Back wall part 121 Guide groove | channel 122 Rotation restriction protrusion 123 Fit convex part 124 Flat plate-shaped part 13 Clamping plate 130 Top plate 131 Side plate 132 1st belt connection hole 133 Fitting recessed part 14 Operation Lever 140 Operation end portion 141 Internal restriction edge portion 142 Engagement claw portion 143 Rotating shaft 144 Spring contact portion 145 Insertion portion side surface contact portion 15 Spring 15A First spring body 15B Second spring body 150 Central portion 150A Central portion (implementation) Example 2)
150B central part (Example 2)
151 End portion 152 Coil 153 Positioning shaft 154 Bending portion 154A First bending portion (Example 2)
154B Second curved portion (Example 2)
155 Abutting portion 2 tongue plate 20 tongue plate body 20a frame portion 20b insertion portion 200 second belt connecting hole 201 belt fixing bracket mounting hole 202 flange 203 guide projection 204 side wall 205 insertion portion side surface 21 belt fixing bracket 210 belt pressing Part 3 Belt

Claims

A buckle body having a substrate and a side plate; a tongue plate having an insertion portion detachable with respect to the buckle body; and a spring for urging the tongue plate from the buckle body in a detaching direction; A safety belt that is provided with a pair of left and right operation levers that are spring-biased and that can be engaged with and disengaged from the insertion portion by rotation, and that can be released by pushing the tongue plate from the engaged state of the operation lever and the tongue plate. For buckle,
The operation lever includes an operation end projecting out of the buckle body, a spring contact portion with which the spring contacts, and a meshing claw portion that can mesh with a tip portion of the tongue plate,
The tongue plate is formed with a flange portion in which the shape of the distal end of the insertion portion is formed in a left and right shape,
The spring is made of a metal wire, and a coil portion is formed on each of the left and right sides of a substantially straight central portion, a curved portion is formed between the two coil portions, and the distal end side is outward with the curved portion. Bending the tip, abutting the operating lever, and a configuration in which the positioning shaft is passed through the coil portion of the spring,
In the engaged state of the buckle body and tongue plate, the engaging claw portion of the operating lever and the tip of the flange portion of the tongue plate are engaged, and the central portion of the spring presses and urges the tip of the insertion portion of the tongue plate. By applying a load in the detaching direction and rotating the operating lever with the spring in the detaching direction of the tongue plate and securing the engagement of the engaging claw of the operating lever with the flange of the tongue plate, the detachment of the tongue plate is prevented. A safety belt buckle.

A buckle body having a substrate and a side plate; a tongue plate having an insertion portion detachable with respect to the buckle body; and a spring for urging the tongue plate from the buckle body in a detaching direction; A safety belt that is provided with a pair of left and right operation levers that are spring-biased and that can be engaged with and disengaged from the insertion portion by rotation, and that can be released by pushing the tongue plate from the engaged state of the operation lever and the tongue plate. For buckle,
The operation lever includes an operation end projecting out of the buckle body, a spring contact portion with which the spring contacts, and a meshing claw portion that can mesh with a tip portion of the tongue plate,
The tongue plate is formed with a flange portion in which the shape of the distal end of the insertion portion is formed in a left and right shape,
The spring consists of a first spring body and a second spring body, both of which are metal plates.
The first spring body is a first bent portion that has a central portion as viewed from the front and has both ends hooked to the positioning shaft,
The second spring body presses the contact portion of the first spring body from the outside, both ends of the second spring body abut against the operation lever,
In the engaged state of the buckle body and tongue plate, the engaging claw portion of the operating lever and the tip of the flange portion of the tongue plate mesh, and the central portion of the first spring body presses and urges the tip of the insertion portion of the tongue plate The tongue plate disengagement direction load is applied, and the tongue plate disengagement direction load and the rotation of the operation lever by the spring ensure the engagement of the engagement lever engaging claw portion with the tongue plate flange portion. A buckle for a safety belt characterized by preventing the withdrawal of the belt.