JP4335548B2

JP4335548B2 - Shock absorber for tape measure

Info

Publication number: JP4335548B2
Application number: JP2003045738A
Authority: JP
Inventors: 毅原
Original assignee: 原度器株式会社
Priority date: 2003-02-24
Filing date: 2003-02-24
Publication date: 2009-09-30
Anticipated expiration: 2023-02-24
Also published as: JP2004257747A; KR20040076190A; KR100940780B1; TWI269864B; TW200416378A

Description

【０００１】
【産業上の利用分野】
本発明は、テープをケース内に巻き取り収納可能な巻尺に関し、特に、ケースのテープ出入口に設けられて、テープ巻き取りの際のテープ先端係止片の衝突エネルギーと、ケース落下等によるテープ上方移動の際の衝突エネルギーを緩和可能な衝撃緩衝装置に関するものである。
【０００２】
【従来技術と問題点】
今日、巻尺は数十メートル等の長い距離を測定するための手巻式の巻尺と、数メートルを測定するための自動巻取式のものがあり、その中でも、測定用テープを自動的に巻き取る自動巻取式のものが広く多くの人に用いられている。
その巻尺は、巻胴部にテープを巻回すると共にそのテープを巻取る付勢手段となるコイルバネが内装された回転ドラムと、その回転ドラムを収納するケースとから構成されている。そして、テープがケース内に収納されているために、測定に際しては、ケースのテープ出入口に係止しているテープ先端の係止片を指で引き、それに続いて引き出されたテープをさらに引き出して測定が行われる。
【０００３】
そして、測定が終了してテープをケース内に収容する際は、テープ制動装置また手によって停止させられているテープの制動を解除することにより、テープはケース内の回転ドラムに内装されたコイルバネによって自動的にケース内に巻き取られ、テープ先端の係止片がテープ出入口に係止されることによってテープの巻き取りが終了する。
また、テープ出入口には衝撃緩衝装置が設けられており、相当な速度でテープ出入口に衝突する係止片の衝突エネルギーを緩和（吸収作用も含む）している。
【０００４】
しかして、衝撃緩衝装置は係止片の衝突エネルギーを緩和する目的で構成されているので、ケースの奥行き方向への緩衝動作のみ可能であり、係止片の衝突以外の方向からの衝撃は緩和できないのである。
このため、係止片がテープ出入口に係止されている状態の時、巻尺を落としたりあるいは他の部材に当てたことによって、係止片がその下方向から衝撃を受けた場合、すなわち、係止片が底部に衝撃を受けた場合、係止片はケースの上方向に押し上げられ、その動作に伴ないテープも上方に移動して衝撃緩衝装置に当たり、衝撃緩衝装置そしてテープや係止片が破損してしまうことが多々あった。
【０００５】
【目的】
本発明は上述した問題点に鑑みてなされたもので、テープの巻き取りの際の係止片の衝突エネルギーの緩和と、係止片がテープ出入口に係止されている状態において、ケースの落下等による係止片の上方移動の際の衝突エネルギーを緩和することができる巻尺の衝撃緩衝装置を提供することを目的とするものである。
【０００６】
【問題を解決するための手段】
本発明の要旨とするところは、ケースのテープ出入口に設けられ、テープ巻き取りの際のテープ先端係止片の衝突エネルギーと、ケース落下等による係止片等の上方移動の際の衝突エネルギーを緩和する衝撃緩衝装置であって、該衝撃緩衝装置は、テープ通孔を有し且つテープ先端係止片を受け止め可能な受止体と、該受止体の後面上方から受止体と適宜の距離を空けて立ち下がるアーム体とからなっており、該アーム体の所定の部位に形成された係合部がケースに形成された案内手段に嵌合または遊嵌されてなることを特徴とする巻尺の衝撃緩衝装置である。
【０００７】
本発明の巻尺の衝撃緩衝装置を詳しく説明すると、ケースとは、測定用のテープを収容する部材であり巻尺の本体でもある。
そのケースは、所望の形状に適宜形成された樹脂または金属等の素材から形成されており、そのケースの内側壁には軸が立設され、その軸にメモリが印刷された測定用のテープを周囲に巻回した回転ドラムが軸支されている。
また、その回転ドラムの内部にはテープを巻き取るためのコイル状の巻き取りバネが設けられており、テープは巻き取り方向に付勢されている。
【０００８】
そのテープは、ケースの前壁下方に設けられているテープ出入口から出入りしており、また、テープの巻き取り終了の際にはテープ先端に有する係止片がテープ出入口に係止されることによって、テープのケース内への引き込まれが阻止されている。そして、係止片は相当な速度でテープ出入口に衝突するため、そのテープ出入口には、係止片の衝突エネルギーを緩和（吸収作用も含む）する衝撃緩衝装置が設けられている。
【０００９】
衝撃緩衝装置は、テープ通孔を有し且つテープ先端係止片を受け止め可能な受止体と、該受止体の後面上方から受止体と適宜の距離を空けて立ち下がるアーム体とから構成されており、該アーム体の所定の部位に形成された係合部がケースに形成された案内手段に嵌合または遊嵌されている。係合部は、アーム体本体の一部分を係合用の部分として用いたり、係合用として専用に形成してもよい。
また、衝撃緩衝装置を形成する素材も特に限定するものではないが、望ましくは、成型性に優れる適当な樹脂素材から形成するのがよい。
【００１０】
受止体は、テープが巻き取られた際に衝突するテープ先端係止片を受け止めることが可能な形態になっていればよく、そして、受止体の本体や衝突部の板厚等も、用いる巻尺の種類によるテープ衝突エネルギーの強弱や係止片の大小等を考慮して好適な厚さを適宜に選定すればよい。
そして、受止体全体を同一の厚さで形成したり、また、部位によって厚さを変えたりしてもよい。厚さの変化を段階状やテーパー状にしてもよい。
【００１１】
テープ通孔の大きさや形状も特に限定するものではなくどのような形状でもよいが、望ましくは、テープの断面形状に近い略三日月形状にするのがよい。そして、テープを通孔に通す際を考慮して、受止体の適宜の部位にテープ通孔に続く切れ目を設けてもよい。
また、受止体の前面すなわちテープの衝突面はその全面を平坦面としてもよいが、テープがケース内に収納されて係止片がテープの衝突面に位置している状態において、係止片の上方部位すなわち受止体の前面上方から、ひさしをテープの引き出し方向に突出形成してもよい。ひさしの突出量は、少なくとも係止片の厚み以上に突出させるのが望ましい。
【００１２】
アーム体は、受止体の後面上方から受止体と適宜の距離を空けて立ち下がっており、また、そのアーム体の所定の部位に形成された係合部がケースに形成された案内手段に嵌合または遊嵌されている。これによって衝撃緩衝装置がテープ出入口の所定の位置に設置される。
受止体の後面上方とは、テープ先端の係止片が、受止体の前面すなわちテープの衝突面に位置している状態において、その係止片のほぼ上端より上方の範囲の部位であり、その部位にアーム体の基部すなわち付根が設けられている。また、アーム体の基部を適宜に補強形成してもよい。アーム体は受止体と一体的に成型するのがよい。
また、アーム体と受止体との間隙は、係止片の衝突による受止体下方部の変形量すなわち押し込まれる度合いに応じて選定すればよい。それは、用いる巻尺の種類によるテープ衝突エネルギーの強弱や係止片の大小等を考慮して適宜に選定すればよい。
【００１３】
そして、アーム体の立下り量は、そのアーム体に形成されている係合部と関係があり、その係合部がテープ巻き取りによる係止片の衝突エネルギーを受止体が十分保持できるか否かで決まる。すなわち、係合部が係止片の衝突範囲面の後方に位置すれば力的に有利となるので、この範囲内に係合部が位置するようにアーム体を立ち下げる。そして、係合部はアーム体の下方に形成するのがよい。
しかし、アーム体本体を係合部の補強手段として利用する形態であれば、係合部が係止片の衝突範囲面の後方から外れた位置にあってもよい。具体的には、アーム体の下端が少なくとも係止片の衝突範囲内まで立ち下がると共に、アーム体のテープ巻き取り方向の面の一部または全部がケース本体に略当接されるようにすることによって、係合部を係止片の衝突範囲内から外れたアーム体の上方（テープより上方）に形成できる。すなわち、テープ巻き取りによる係止片の衝突エネルギーをアーム体のケース本体に略当接された部位で受けるようにすればよい。
【００１４】
そして、アーム体に形成されている係合部とケースに形成されている案内手段との嵌合または遊嵌において、嵌合とは、係合部が自由に動かないように案内手段に嵌っている状態で、しかし、少なくとも受止体がテープ出入口の上方に回動変形できるように嵌合しなければならない。具体的には、アーム体や嵌合部が復帰可能に変形できるようにする。
また、遊嵌とは、係合部が自由に動くように案内手段に嵌っている状態で、具体的には軸支であって、受止体がテープ出入口の上方に自由に回動できることである。それは、係合部をテープ短手方向の両端付近に形成すなわちケースの左右側壁の方向に向かって軸を突出させ、且つその軸をケースの左右側壁に形成した案内手段である軸受けで支持する。この係合部および案内手段の形成形態は、前述の嵌合の場合も適用されるものである。
【００１５】
そして、受止体がテープ出入口の上方に回動した際、元の位置に強制的に復帰させるための適宜の復帰手段を衝撃緩衝装置の適宜の部位に設けてもよい。復帰手段は係合部を遊嵌するものに適する。勿論、嵌合するものに設けてもよい。しかして、復帰手段を用いることなく、テープの自己復帰作用（テープの湾曲形状から）によって受止体を復帰させるようにしてもよい。
アーム体の設置形態も特に限定するものではなく、テープの通過に支障が無ければどのような形態（形状）で設置してもよい。具体的には、アーム体を受止体の後面上方のテープ短手方向の両端付近から一対で設けてもよい。そして、それぞれのアーム体の下方にブリッジを架設して補強してもよい。
【００１６】
前述の係合部においては、係合部をアーム体に形成するのではなく別部材に形成して、その別部材をアーム体に取り付けるようにしてもよい。別部材は、少なくともアーム体と一体的に成型するのがよい。
具体的には、アーム体の下方からテープの巻き取り方向に別部材を突出形成して、その突出部材に係合部を形成する。その突出部材とアーム体との接続部が突出部材の基部すなわち付根となる。
そして、この係合部とケースに形成される案内手段との嵌合または遊嵌においては、上述したような、係合部および案内手段の形成形態が適用され、また、受止体がテープ出入口の上方に回動した際、元の位置に強制的に復帰させるための適宜の復帰手段を、別部材を含めて衝撃緩衝装置の適宜の部位に設けてもよい。
【００１７】
そして、衝撃緩衝装置の具体的な構造としては、テープ通孔を有し且つテープ先端係止片を受け止め可能な受止体と、該受止体の後面上方のテープ短手方向両端付近から受止体と適宜の距離を空けて立ち下がり且つ下方端付近にブリッジが架設されている一対のアーム体と、該アーム体の下方からテープの巻き取り方向に突出形成されてケースに形成された案内手段に嵌合または遊嵌する係合部を有した係合体とから構成するのがよい。
衝撃緩衝装置は、一体成型可能な樹脂等の素材から形成するのがよい。また、アーム体の基部は適宜に補強形成してもよい。
【００１８】
この形態においても、受止体は、テープがケース内に収納されて係止片がテープの衝突面に位置している状態において、受止体の係止片の上方部位すなわち受止体の前面上方から、ひさしをテープの引き出し方向に少なくとも係止片の厚み以上に突出形成するのがよい。
また、受止体がテープ出入口の上方に回動した際、元の位置に強制的に復帰させるための適宜の復帰手段を衝撃緩衝装置の適宜の部位に設けるのがよく、この場合の復帰手段は、アーム体および／または係合体にテープの巻き取り方向に突出形する舌状体を形成し、受止体がテープ出入口の上方に回動した際この舌状体の適宜の部位がケースの内壁等に当接して舌状体が撓むようにする。勿論、舌状体は撓み可能な素材とするが、撓み可能であれば衝撃緩衝装置の成形素材と同一の素材で形成してもよい。復帰手段は係合部を遊嵌するものに適する。
【００１９】
【作用】
本発明の巻尺の衝撃緩衝装置は以上のように構成されているので、テープが巻き取られてテープ先端の係止片が衝撃緩衝装置の受止体に衝突すると、その衝突によって、受止体はアーム体の基部すなわち付根を支点にテープの巻き取り方向の下方向に回転し、且つアーム体は係合部を支点にテープの巻き取り方向の上方向に回転しようとする。また、係合部が突出部材に設けられている場合は、アーム体は突出部材の基部すなわち付根を支点にテープの巻き取り方向の上方向に回転しようとする。すなわち、受止体とアーム体がテープの巻き取り方向に向けて撓み変形することによって衝突エネルギーが吸収されていく。
【００２０】
また、ケースの落下あるいは他の部材に当てたことにより係止片にその下方向から衝撃が加わった時は、その衝撃によって係止片はテープと共に上方向に押し上げられて受止体のテープ通孔の上部に衝突すると、その衝突によって、衝撃緩衝装置は係合部を支点にテープの巻き取り方向の上方向に回転しようとする。すなわち、この回転によって係止片とテープが上方向に逃げ、係止片が受けた衝撃が吸収されていく。
【００２１】
係合部が遊嵌状態のものは、衝撃緩衝装置が係合部を支点にテープの巻き取り方向の上方向に自由に回転する際、復帰手段の撓み等の変形によって係止片が受けた衝撃が吸収され、且つ復帰用の付勢手段となりその後に係止片が復帰する。また、復帰手段が設けられていないものは、テープの変形によって係止片が受けた衝撃が吸収され、テープの自己復帰作用で係止片が復帰する。
また、係合部が嵌合状態のものは、衝撃緩衝装置が係合部を支点にテープの巻き取り方向の上方向に回転する際、アーム体や係合部の捩れ等の変形によって係止片が受けた衝撃が吸収され、且つ復帰用の付勢手段となりその後に係止片が復帰する。
【００２２】
【実施例】
本発明の巻尺の衝撃緩衝装置を以下図面に従って説明すると、図１は、本発明に係る衝撃緩衝装置の斜視図であり、１は衝撃緩衝装置、２はテープ先端の係止片を受け止める受止体、２１は受止体２の上方に形成されたひさし、２２はテープが通過するテープ通孔で、本図は、テープの断面形状に近い三日月形状としている。３は受止体２の後面上方から立ち下がるアーム体で、３１は一対で設けられているそれぞれのアーム体３を結ぶブリッジ、４は係合部５が形成された突出部材で、係合部５がケース７に形成された案内手段９に係合される。６は弾性体で、衝撃吸収のため衝撃緩衝装置１が係合部５を支点に上方向に回転移動した後に復帰させるためのものである。この弾性体は舌状のものである。
図２は、衝撃緩衝装置の側面図である。
【００２３】
図３は、ケース内部のテープ出入口付近の拡大側面図であり、７は巻尺のケース、８はテープ１２が出入するテープ出入口、９はケース７に形成された衝撃緩衝装置１の係合部５と係合する案内手段、１０はテープ１２を巻回する回転ドラム、１１はテープを停止させるためのブレーキ、１２は測定用のテープで、その先端に係止片１３が設けられている。
【００２４】
図４は、係止片に下方から衝撃が加わった時の衝撃緩衝動作を示す図であり、ケースの落下あるいは他の部材に当てたことにより係止片１３にその下方向から衝撃が加わると、係止片１３はテープ１２と共に上方向に押し上げられ、さらに、係止片１３およびテープ１２と共に衝撃緩衝装置１の受止体２も上方向に押し上げられる。すなわち、ケース７の案内手段９に係合された係合部５を支点に衝撃緩衝装置１が上方向に回転して逃げる。その際、弾性体６を変形させながら行われるので衝撃は徐々に吸収される。
【００２５】
図５は、テープ巻き取り時の衝撃緩衝動作を示す図であり、テープ１２が巻き取られてテープ１２の先端の係止片１３が衝撃緩衝装置１の受止体２に衝突すると、その衝突によって、受止体２はアーム体３の基部すなわち付根を支点にテープ１２の巻き取り方向の下方向に回転し、且つアーム体３は突出部材４の基部すなわち付根を支点にテープ１２の巻き取り方向の上方向に回転しようとする。また、衝撃によってはアーム体３自体も大きく変形する。すなわち、受止体２とアーム体３がテープ１２の巻き取り方向に向けてたわみ変形することによって衝突エネルギーが吸収されていく。
【００２６】
図６は、他の形態の衝撃緩衝装置の一例を示す図であり、１は衝撃緩衝装置、２はテープ先端の係止片を受け止める受止体、２２はテープが通過するテープ通孔、３は受止体２の後面上方から立ち下がるアーム体、３１は一対で設けられているそれぞれのアーム体３を結ぶブリッジである。５ケース７に形成された案内手段９と係合する係合部で、本図は、アーム体３の下方部の両端に形成したものである。６は弾性体で、衝撃吸収のため衝撃緩衝装置１が係合部５を支点に上方向に回転移動した後に復帰させるものである。
【００２７】
図７は、他の形態の衝撃緩衝装置の一例を示す図であり、本図は、ケース７に形成された案内手段９と係合する係合部５をアーム体３の上方部の両端に形成したものである。すなわち、係合部５が係止片１３の衝突範囲面の後方から外れた位置にあるものである。
この時の係止片１３の衝突エネルギーの吸収は、アーム体３が係合部５とケース７の止め１４によって支えられるので、受止体２はアーム体３の基部すなわち付根を支点にテープ１２の巻き取り方向に向けて撓み変形することによって衝突エネルギーが吸収されていく。また、係止片にその下方向から衝撃が加わった時の衝突エネルギーの吸収は、係合部５を支点に衝撃緩衝装置１が上方向に回転して逃げる。その際、弾性体６を変形させながら行われるので衝撃は徐々に吸収される。
【００２８】
図８は、他の形態の衝撃緩衝装置の一例を示す図であり、本図は、アーム体３の一部分を係合用の部分とし、その部位がケース７に形成された案内手段９と係合しているものである。すなわち、アーム体３の自由端を係合用の部分としており、その自由端がアーム体３の係合部５となる。
この時の係止片１３の衝突エネルギーの吸収は、受止体２がアーム体３の基部すなわち付根を支点にテープ１２の巻き取り方向の下方向に回転し、且つアーム体３は略係合部５を支点にテープ１２の巻き取り方向の上方向に回転しようとする。また、衝撃によってはアーム体３自体も大きく変形する。すなわち、受止体２とアーム体３がテープ１２の巻き取り方向に向けてたわみ変形することによって衝突エネルギーが吸収されていく。
【００２９】
図９は、係合部と案内手段との係合関係の一例を示す図であり、本図は、アーム体３の係合部５とケース７の案内手段９との係合が遊嵌するものである。
係合部５を丸軸５１とし、案内手段９を丸軸受９１としており、係止片１３にその下方向から衝撃が加わった場合には衝撃緩衝装置１が自由に上方に回転移動する。また、回転移動した後の復帰は弾性体６によって行われる。
【００３０】
図１０は、係合部と案内手段との係合関係の一例を示す図であり、本図は、アーム体３の係合部５とケース７の案内手段９との係合が嵌合するものである。
係合部５を角軸５２とし、案内手段９を角軸受９２としており、係止片１３にその下方向から衝撃が加わった場合には衝撃緩衝装置１が係合部５の嵌合に逆らい、且つアーム体３を変形させながら上方に回転移動する。また、回転移動した後の復帰は係合部５およびアーム体３の自己復帰作用によって行われる。
【００３１】
【効果】
本発明の巻尺の衝撃緩衝装置は以上のように構成されているので、テープの巻き取りの際の係止片の衝突エネルギーの吸収は勿論のこと、係止片がテープ出入口に係止されている状態において、ケースの落下等により係止片がその下方向から衝撃を受けた場合でも、衝撃緩衝装置が上方に逃げることができると共に、衝撃を吸収できるので、係止片やテープさらにはケースのテープ出入口等の損傷を防止することができる。
【００３２】
そして、衝撃緩衝装置を一体的に形成することができると共に、衝撃緩衝装置のケース内への装着構造も極めて簡単であるので、組み立て作業も容易にすることができ製造ミス等も防止することができる。
さらには、衝撃緩衝装置を装備していない巻尺に新たに装備する場合や、係止片の衝突エネルギーのみ緩和している巻尺に装備しようとする場合も、衝撃緩衝装置のケース内への装着構造が簡単であるので容易に装備することができる。
【図面の簡単な説明】
【図１】本発明に係る衝撃緩衝装置の斜視図
【図２】衝撃緩衝装置の側面図
【図３】ケース内部のテープ出入口付近の拡大側面図
【図４】係止片に下方から衝撃が加わった時の衝撃緩衝動作を示す図
【図５】テープ巻き取り時の衝撃緩衝動作を示す図
【図６】他の形態の衝撃緩衝装置の一例を示す図
【図７】他の形態の衝撃緩衝装置の一例を示す図
【図８】他の形態の衝撃緩衝装置の一例を示す図
【図９】係合部と案内手段との係合関係の一例を示す図
【図１０】係合部と案内手段との係合関係の一例を示す図
【符号の説明】
１−衝撃緩衝装置，２−受止体，２１−ひさし，２２−テープ通孔，３−アーム体，３１−ブリッジ，４−突出部材，５−係合部，５１−丸軸，５２−角軸，６−弾性体，７−ケース，８−テープ出入口，９−案内手段，９１−丸軸受，９２−角軸受，１０−回転ドラム，１１−ブレーキ，１２−テープ，１３−係止片，１４−止め[0001]
[Industrial application fields]
The present invention relates to a tape measure capable of winding and storing a tape in a case, and in particular, provided at a tape entrance / exit of the case, the collision energy of a tape leading end locking piece at the time of winding the tape, and the upper part of the tape due to the case dropping or the like The present invention relates to an impact buffering device capable of mitigating collision energy during movement.
[0002]
[Prior art and problems]
Today, there are two types of tape measure: a hand-winding tape measure for measuring long distances such as several tens of meters, and an automatic winding-type tape measure for measuring several meters. Among them, a measuring tape is automatically wound. The automatic take-up type is widely used by many people.
The tape measure is composed of a rotating drum in which a coil spring serving as an urging means for winding the tape and winding the tape is housed, and a case for storing the rotating drum. And since the tape is stored in the case, when measuring, pull the locking piece at the tip of the tape that is locked to the tape inlet / outlet of the case with your finger, and then pull out the tape pulled out further. Measurement is performed.
[0003]
When the measurement is completed and the tape is accommodated in the case, the tape is stopped by a tape braking device or a coil spring built in the rotating drum in the case by releasing the braking of the tape stopped by the hand. The tape is automatically wound up in the case, and the tape winding is completed when the locking piece at the tip of the tape is locked at the tape inlet / outlet.
Further, an impact buffering device is provided at the tape inlet / outlet, and the collision energy of the locking piece that collides with the tape inlet / outlet at a considerable speed is reduced (including the absorbing action).
[0004]
Since the shock absorber is designed to reduce the collision energy of the locking piece, it can only be buffered in the depth direction of the case, and the shock from directions other than the collision of the locking piece can be reduced. It is not possible.
For this reason, when the locking piece is locked at the tape doorway, if the locking piece is impacted from below by dropping the tape measure or hitting it with another member, that is, When the stopper receives an impact on the bottom, the locking piece is pushed upward in the case, and the tape also moves upward in accordance with the operation and hits the shock absorbing device, and the shock absorbing device and the tape or the locking piece are It was often damaged.
[0005]
【the purpose】
The present invention has been made in view of the above-described problems. In the state where the collision energy of the locking piece at the time of winding the tape is reduced and the locking piece is locked to the tape inlet / outlet, the case is dropped. An object of the present invention is to provide a shock absorber with a tape measure that can alleviate the collision energy when the locking piece is moved upward due to the above.
[0006]
[Means for solving problems]
The gist of the present invention is that it is provided at the tape inlet / outlet of the case, and the collision energy of the tape leading end locking piece when winding the tape and the collision energy when the locking piece etc. move upward due to the case dropping etc. A shock absorbing device that relaxes, wherein the shock absorbing device includes a receiving body that has a tape through hole and is capable of receiving a tape front end locking piece, and a receiving body from above the rear surface of the receiving body. It is composed of an arm body that falls at a distance, and an engagement portion formed at a predetermined part of the arm body is fitted or loosely fitted to guide means formed on the case. It is a shock absorber of a tape measure.
[0007]
The shock absorber of the tape measure according to the present invention will be described in detail. The case is a member that accommodates a measuring tape and is also the main body of the tape measure.
The case is made of a material such as resin or metal that is appropriately formed in a desired shape, and a measuring tape with a shaft erected on the inner wall of the case and memory printed on the shaft. A rotating drum wound around is supported.
Further, a coiled winding spring for winding the tape is provided inside the rotating drum, and the tape is biased in the winding direction.
[0008]
The tape enters and exits from the tape entrance / exit provided under the front wall of the case, and when the winding of the tape is finished, the locking piece at the tip of the tape is engaged with the tape entrance / exit. The tape is prevented from being pulled into the case. Since the locking piece collides with the tape inlet / outlet at a considerable speed, an impact buffering device is provided at the tape inlet / outlet for relaxing the collision energy of the locking piece (including the absorbing action).
[0009]
The shock absorbing device includes a receiving body having a tape through hole and capable of receiving a tape leading end locking piece, and an arm body that falls at an appropriate distance from the receiving body from above the rear surface of the receiving body. The engaging part formed in the predetermined | prescribed site | part of this arm body is fitted or loosely fitted by the guide means formed in the case. The engaging portion may use a part of the arm body main body as an engaging portion or may be formed exclusively for engaging.
Further, the material for forming the shock absorbing device is not particularly limited, but it is preferably formed from a suitable resin material having excellent moldability.
[0010]
The receiving body only needs to be in a form capable of receiving the tape leading end locking piece that collides when the tape is wound, and the thickness of the receiving body and the collision portion are also as follows. A suitable thickness may be appropriately selected in consideration of the strength of the tape collision energy depending on the type of tape measure used, the size of the locking piece, and the like.
And you may form the whole receiving body by the same thickness, and may change thickness according to a site | part. The change in thickness may be stepped or tapered.
[0011]
The size and shape of the tape through-hole are not particularly limited, and may be any shape, but it is desirable to have a substantially crescent shape close to the cross-sectional shape of the tape. Then, in consideration of passing the tape through the hole, a cut line following the tape hole may be provided at an appropriate portion of the receiving body.
Further, the front surface of the receiving body, that is, the collision surface of the tape may be a flat surface. However, in the state where the tape is stored in the case and the engagement piece is positioned on the collision surface of the tape, The eaves may be formed so as to protrude in the direction of drawing out the tape from the upper part of the upper part, that is, from the upper front of the receiving body. It is desirable that the protruding amount of the eaves protrudes at least more than the thickness of the locking piece.
[0012]
The arm body falls from the upper rear surface of the receiving body at an appropriate distance from the receiving body, and the engaging means formed at a predetermined portion of the arm body is formed in the case. Is fitted or loosely fitted. Thus, the shock absorbing device is installed at a predetermined position of the tape entrance / exit.
The upper rear surface of the receiving body is a portion in a range substantially above the upper end of the locking piece when the locking piece at the tip of the tape is located on the front surface of the receiving body, that is, the collision surface of the tape. The base portion of the arm body, that is, the root is provided at that portion. Further, the base portion of the arm body may be appropriately reinforced. The arm body is preferably molded integrally with the receiving body.
Further, the gap between the arm body and the receiving body may be selected according to the amount of deformation of the lower part of the receiving body due to the collision of the locking pieces, that is, the degree of being pushed. What is necessary is just to select suitably considering the intensity | strength of the tape collision energy by the kind of tape measure to be used, the magnitude | size of a locking piece, etc. FIG.
[0013]
The fall amount of the arm body is related to the engaging portion formed on the arm body, and can the receiving body sufficiently hold the collision energy of the locking piece by the tape winding? It depends on whether or not. That is, since it is advantageous in terms of force if the engaging portion is located behind the collision range surface of the locking piece, the arm body is lowered so that the engaging portion is located within this range. The engaging portion is preferably formed below the arm body.
However, as long as the arm body main body is used as a means for reinforcing the engaging portion, the engaging portion may be at a position away from the rear of the collision range surface of the locking piece. Specifically, the lower end of the arm body falls to at least the collision range of the locking piece, and part or all of the surface of the arm body in the tape winding direction is substantially in contact with the case body. Thus, the engaging portion can be formed above the arm body (above the tape) outside the collision range of the locking piece. That is, the collision energy of the locking piece due to winding of the tape may be received at a portion that is substantially in contact with the case body of the arm body.
[0014]
In the fitting or loose fitting between the engaging portion formed on the arm body and the guiding means formed on the case, the fitting means fitting on the guiding means so that the engaging portion does not move freely. However, at least the receiving body must be fitted so as to be able to rotate and deform above the tape doorway. Specifically, the arm body and the fitting part can be deformed so that they can be restored.
In addition, loose fitting is a state in which the engaging portion is fitted to the guide means so as to move freely, specifically a shaft support, and the receiving body can be freely rotated above the tape doorway. is there. That is, the engaging portion is formed in the vicinity of both ends in the short direction of the tape, that is, the shaft protrudes in the direction of the left and right side walls of the case, and the shaft is supported by bearings that are guide means formed on the left and right side walls of the case. This form of formation of the engaging portion and the guide means is also applied in the case of the aforementioned fitting.
[0015]
And when a receiving body rotates above a tape entrance, you may provide the suitable return means for forcibly returning to an original position in the suitable site | part of an impact buffering device. The return means is suitable for loosely fitting the engaging portion. Of course, you may provide in what fits. Therefore, the receiving body may be returned by the self-returning action of the tape (from the curved shape of the tape) without using the return means.
The installation form of the arm body is not particularly limited, and may be installed in any form (shape) as long as the passage of the tape is not hindered. Specifically, a pair of arm bodies may be provided from the vicinity of both ends in the tape short direction above the rear surface of the receiving body. And you may reinforce by constructing a bridge under each arm body.
[0016]
In the above-described engagement portion, the engagement portion may be formed in a separate member instead of being formed in the arm body, and the separate member may be attached to the arm body. The separate member is preferably molded integrally with at least the arm body.
Specifically, another member is protruded from the lower side of the arm body in the tape winding direction, and the engaging portion is formed on the protruding member. A connecting portion between the projecting member and the arm body serves as a base, that is, a root of the projecting member.
In the fitting or loose fitting between the engaging portion and the guide means formed in the case, the above-described form of the engaging portion and the guide means is applied, and the receiving body is a tape entrance / exit. Appropriate returning means for forcibly returning to the original position when it is rotated upward may be provided at appropriate portions of the shock absorbing device including other members.
[0017]
As a specific structure of the shock absorbing device, there are a receiving body having a tape through hole and capable of receiving the tape leading end locking piece, and receiving from the vicinity of both ends in the tape short direction above the rear surface of the receiving body. A pair of arm bodies that fall at an appropriate distance from the stationary body and have a bridge installed near the lower end, and guides that are formed in the case so as to project from the lower side of the arm bodies in the tape winding direction. It is good to comprise from the engaging body which has the engaging part fitted or loosely fitted to a means.
The shock absorbing device is preferably formed from a material such as resin that can be integrally molded. Further, the base portion of the arm body may be appropriately reinforced.
[0018]
Also in this form, the receiving body is located above the locking piece of the receiving body, that is, the front surface of the receiving body in a state where the tape is housed in the case and the locking piece is positioned on the collision surface of the tape. From above, the eaves may be formed so as to protrude in the tape drawing direction at least as thick as the locking piece.
In addition, it is preferable to provide an appropriate return means for forcibly returning to the original position when the receiving body is rotated above the tape entrance / exit, in an appropriate part of the shock absorbing device. Forms a tongue-like body projecting in the tape winding direction on the arm body and / or the engaging body, and when the receiving body rotates above the tape inlet / outlet, an appropriate portion of the tongue-like body is located on the case. The tongue is bent so as to contact the inner wall or the like. Of course, the tongue is made of a material that can be bent, but may be formed of the same material as the molding material of the shock absorbing device if it can be bent. The return means is suitable for loosely fitting the engaging portion.
[0019]
[Action]
Since the impact buffering device of the tape measure of the present invention is configured as described above, when the tape is wound up and the locking piece at the tip of the tape collides with the receiving body of the impact buffering device, the collision is caused by the collision. Rotates downward in the tape winding direction with the base portion or root of the arm body as a fulcrum, and the arm body tries to rotate upward in the tape winding direction with the engaging portion as a fulcrum. When the engaging portion is provided on the projecting member, the arm body tries to rotate upward in the tape winding direction with the base of the projecting member, that is, the root. That is, the collision energy is absorbed by the receiving body and the arm body being bent and deformed in the tape winding direction.
[0020]
In addition, when an impact is applied to the locking piece from below due to falling of the case or contact with another member, the locking piece is pushed upward together with the tape by the impact, and the tape of the receiving body is passed through. When it collides with the upper part of the hole, the shock absorbing device tries to rotate upward in the tape winding direction with the engaging part as a fulcrum by the collision. That is, by this rotation, the locking piece and the tape escape upward, and the impact received by the locking piece is absorbed.
[0021]
When the engagement portion is loosely fitted, the locking piece is received by the deformation of the return means when the shock absorbing device freely rotates upward in the tape winding direction with the engagement portion as a fulcrum. The impact is absorbed and becomes a biasing means for return, after which the locking piece returns. In the case where the return means is not provided, the impact received by the locking piece due to the deformation of the tape is absorbed, and the locking piece is restored by the self-returning action of the tape.
In addition, when the engaging portion is in the engaged state, when the shock absorbing device rotates upward with the engaging portion as a fulcrum, the arm body and the engaging portion are locked by deformation such as torsion. The impact received by the piece is absorbed and becomes a biasing means for return, after which the locking piece returns.
[0022]
【Example】
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An impact shock absorber of a tape measure according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of the impact shock absorber according to the present invention. The body, 21 is an eaves formed above the receiving body 2, 22 is a tape through hole through which the tape passes, and this figure has a crescent shape close to the cross-sectional shape of the tape. 3 is an arm body that falls from above the rear surface of the receiving body 2, 31 is a bridge that connects the arm bodies 3 provided in a pair, and 4 is a protruding member on which an engagement portion 5 is formed. 5 is engaged with guide means 9 formed in the case 7. Reference numeral 6 denotes an elastic body that is used for the shock absorbing device 1 to return after rotating upward with the engaging portion 5 as a fulcrum for absorbing the shock. This elastic body is tongue-shaped.
FIG. 2 is a side view of the shock absorbing device.
[0023]
FIG. 3 is an enlarged side view of the vicinity of the tape inlet / outlet inside the case, 7 is a tape measure case, 8 is a tape inlet / outlet through which the tape 12 enters / exits, and 9 is an engaging portion 5 of the shock absorbing device 1 formed in the case 7. 10 is a rotating drum that winds the tape 12, 11 is a brake for stopping the tape, 12 is a measuring tape, and a locking piece 13 is provided at the tip thereof.
[0024]
FIG. 4 is a diagram showing an impact buffering operation when an impact is applied to the locking piece from below, and when the impact is applied to the locking piece 13 from below by dropping the case or hitting it with another member. The locking piece 13 is pushed up together with the tape 12, and the receiving body 2 of the shock absorbing device 1 is pushed up together with the locking piece 13 and the tape 12. That is, the shock absorbing device 1 rotates upward and escapes with the engaging portion 5 engaged with the guide means 9 of the case 7 as a fulcrum. At this time, since the elastic body 6 is deformed, the impact is gradually absorbed.
[0025]
FIG. 5 is a diagram showing an impact buffering operation at the time of winding the tape. When the tape 12 is wound and the locking piece 13 at the tip of the tape 12 collides with the receiving body 2 of the impact buffer 1, the collision is performed. Thus, the receiving body 2 rotates downward in the winding direction of the tape 12 with the base portion or root of the arm body 3 as a fulcrum, and the arm body 3 winds up the tape 12 with the base portion or root of the protruding member 4 as the fulcrum. Try to rotate upward in the direction. Further, the arm body 3 itself is greatly deformed by an impact. That is, the collision energy is absorbed by the deformation of the receiving body 2 and the arm body 3 toward the winding direction of the tape 12.
[0026]
FIG. 6 is a view showing an example of another type of shock absorbing device, in which 1 is the shock absorbing device, 2 is a receiving body for receiving the locking piece at the tip of the tape, 22 is a tape through hole through which the tape passes, Is an arm body that falls from above the rear surface of the receiving body 2, and 31 is a bridge that connects the arm bodies 3 provided in a pair. 5 is an engaging portion that engages with the guide means 9 formed in the case 7 and is formed at both ends of the lower portion of the arm body 3. Reference numeral 6 denotes an elastic body, which is returned after the shock absorbing device 1 is rotated upward with the engaging portion 5 as a fulcrum for absorbing the shock.
[0027]
FIG. 7 is a view showing an example of another type of shock absorbing device. In this figure, engaging portions 5 that engage with guide means 9 formed in the case 7 are provided at both ends of the upper portion of the arm body 3. Formed. That is, the engaging portion 5 is located at a position away from the rear of the collision range surface of the locking piece 13.
Since the arm body 3 is supported by the engaging portion 5 and the stopper 14 of the case 7 for absorbing the collision energy of the locking piece 13 at this time, the receiving body 2 uses the base portion of the arm body 3, that is, the root as a fulcrum. The collision energy is absorbed by bending and deforming in the winding direction. In addition, when the impact is applied to the locking piece from below, the impact energy is absorbed by the impact buffer 1 rotating upward with the engaging portion 5 as a fulcrum. At this time, since the elastic body 6 is deformed, the impact is gradually absorbed.
[0028]
FIG. 8 is a view showing an example of another type of shock absorbing device. In this figure, a part of the arm body 3 is used as a part for engagement, and the part engages with the guide means 9 formed in the case 7. It is what you are doing. That is, the free end of the arm body 3 is used as a portion for engagement, and the free end serves as the engaging portion 5 of the arm body 3.
At this time, the collision energy of the locking piece 13 is absorbed by the receiving body 2 rotating downward in the winding direction of the tape 12 with the base portion, that is, the root of the arm body 3 as a fulcrum. An attempt is made to rotate upward in the winding direction of the tape 12 with the portion 5 as a fulcrum. Further, the arm body 3 itself is greatly deformed by an impact. That is, the collision energy is absorbed by the deformation of the receiving body 2 and the arm body 3 toward the winding direction of the tape 12.
[0029]
FIG. 9 is a diagram showing an example of the engagement relationship between the engagement portion and the guide means. In this figure, the engagement between the engagement portion 5 of the arm body 3 and the guide means 9 of the case 7 is loosely fitted. Is.
The engaging portion 5 is a round shaft 51 and the guiding means 9 is a round bearing 91. When an impact is applied to the locking piece 13 from below, the shock absorbing device 1 freely rotates upward. The return after the rotational movement is performed by the elastic body 6.
[0030]
FIG. 10 is a diagram showing an example of the engagement relationship between the engagement portion and the guide means. In this figure, the engagement between the engagement portion 5 of the arm body 3 and the guide means 9 of the case 7 is fitted. Is.
The engaging portion 5 is a square shaft 52 and the guiding means 9 is a square bearing 92. When an impact is applied to the locking piece 13 from below, the shock absorbing device 1 resists the fitting of the engaging portion 5. The arm body 3 is rotated upward while deforming. Further, the return after the rotational movement is performed by the self-return action of the engaging portion 5 and the arm body 3.
[0031]
【effect】
Since the impact shock absorber of the tape measure of the present invention is configured as described above, not only is the collision energy absorbed by the locking piece during winding of the tape, but also the locking piece is locked to the tape entrance / exit. Even if the locking piece receives an impact from below when the case is dropped, etc., the shock absorber can escape upward and absorb the shock, so the locking piece, tape, and case It is possible to prevent damage to the tape doorway.
[0032]
And since the shock absorbing device can be formed integrally and the mounting structure of the shock absorbing device in the case is very simple, the assembly work can be facilitated and manufacturing errors can be prevented. it can.
Furthermore, when mounting a new tape measure that is not equipped with a shock absorber, or when trying to equip a tape measure that only reduces the collision energy of the locking piece, the structure for mounting the shock absorber in the case Since it is simple, it can be easily equipped.
[Brief description of the drawings]
FIG. 1 is a perspective view of an impact buffering device according to the present invention. FIG. 2 is a side view of the impact buffering device. FIG. 3 is an enlarged side view of the vicinity of a tape entrance in the case. FIG. 5 is a diagram showing an impact buffering operation when the tape is applied. FIG. 5 is a diagram showing an impact buffering operation when winding the tape. FIG. 6 is a diagram showing an example of another type of shock buffering device. FIG. 8 is a view showing an example of an impact buffer device according to another embodiment. FIG. 9 is a view showing an example of an engagement relationship between the engaging portion and the guide means. Showing an example of the engagement relationship between the guide and the guide means [Explanation of symbols]
1-shock absorber, 2-receiving body, 21-eave, 22-tape through hole, 3-arm body, 31-bridge, 4-projection member, 5-engaging part, 51-round shaft, 52-angle Shaft, 6-elastic body, 7-case, 8-tape doorway, 9-guide means, 91-round bearing, 92-square bearing, 10-rotating drum, 11-brake, 12-tape, 13-locking piece, 14-stop

Claims

An impact buffering device that is provided at a tape entrance / exit of the case and reduces the collision energy of the tape tip locking piece at the time of winding the tape and the collision energy at the time of upward movement of the locking piece etc. due to the case dropping, The shock absorber includes a receiving body having a tape through-hole and capable of receiving a tape leading end locking piece, and an arm body falling from the upper rear surface of the receiving body with an appropriate distance from the receiving body. An impact buffering device for a tape measure, characterized in that an engaging portion formed at a predetermined portion of the arm body is fitted or loosely fitted into guide means formed on a case.

2. A shock absorbing device for a tape measure according to claim 1, wherein the tape through hole of the receiving body has a substantially crescent shape.

2. An impact buffering device for a tape measure according to claim 1, wherein an eaves is formed so as to project in the tape drawing direction from above the front surface of the receiving body.

The shock absorber for a tape measure according to claim 1, wherein the arm bodies are formed as a pair from near both ends of the receiving body in the tape short direction.

5. A shock absorbing device for a tape measure according to claim 4, wherein a bridge is provided below the arm body.

2. The shock absorbing device for a tape measure according to claim 1, wherein a base portion of the arm body is reinforced.

The shock absorbing device for a tape measure according to claim 1, wherein the engaging portion is formed below the arm body.

2. The shock absorbing device for a tape measure according to claim 1, wherein the engaging portion is formed in the vicinity of both ends in the tape short direction.

The impact buffering device for a tape measure according to claim 1, wherein the engaging portion is formed on a projecting member that projects in the tape winding direction from below the arm body.

10. The shock absorbing device for a tape measure according to claim 9, wherein the engaging portion is formed in the vicinity of both ends in the tape short direction.

2. A shock absorbing device for a tape measure according to claim 1, wherein at least a return means after mitigating the collision energy at the time of upward movement of the locking piece or the like is provided at an appropriate portion.

An impact buffering device that is provided at a tape entrance / exit of the case and reduces the collision energy of the tape tip locking piece at the time of winding the tape and the collision energy at the time of upward movement of the locking piece etc. due to the case dropping, The shock absorber includes a receiving body having a tape through-hole and capable of receiving a tape leading end locking piece, and an appropriate distance from the receiving body from the vicinity of both ends in the tape short direction above the rear surface of the receiving body. Fits or loosely fits into a pair of arm bodies that fall off and are bridged near the lower end, and guide means formed in the case that protrude from the lower side of the arm bodies in the tape winding direction. An impact buffering device for a tape measure characterized by comprising an engaging body having an engaging portion

13. A shock absorbing device for a tape measure according to claim 12, wherein an eaves is formed so as to project from the upper front surface of the receiving body in the tape drawing direction.

The shock absorbing device for a tape measure according to claim 12, wherein a base portion of the arm body is reinforced.

13. A shock absorbing device for a tape measure according to claim 12, wherein at least a return means after mitigating collision energy at the time of upward movement of the locking piece or the like is provided at an appropriate portion.

16. The shock absorbing device for a tape measure according to claim 15, wherein the return means is a tongue-like body formed on the arm body and / or the engaging body and protruding in the tape winding direction.