JP6889907B2 - Coupler - Google Patents

Coupler Download PDF

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Publication number
JP6889907B2
JP6889907B2 JP2017079208A JP2017079208A JP6889907B2 JP 6889907 B2 JP6889907 B2 JP 6889907B2 JP 2017079208 A JP2017079208 A JP 2017079208A JP 2017079208 A JP2017079208 A JP 2017079208A JP 6889907 B2 JP6889907 B2 JP 6889907B2
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elastic body
rod
fixing member
groove
fixed
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JP2018175380A (en
JP2018175380A5 (en
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崇史 山田
崇史 山田
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Mizuho Corp
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Mizuho Corp
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Priority to JP2017079208A priority Critical patent/JP6889907B2/en
Priority to PCT/JP2018/014918 priority patent/WO2018190293A1/en
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Publication of JP2018175380A5 publication Critical patent/JP2018175380A5/ja
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/04Clamping or clipping connections

Description

本発明は、脊椎の固定治療に用いられる連結器に関する。 The present invention relates to a coupler used for spinal fusion therapy.

脊椎の矯正治療では、脊椎を固定して治療が行われ、例えば、複数の椎骨にスクリューを植え込み、このスクリューにロッドを取り付けて脊椎が固定されて治療される。 In orthodontic treatment of the spine, the spine is fixed and treated. For example, a screw is implanted in a plurality of vertebrae, and a rod is attached to the screw to fix the spine and treat the spine.

また、このロッドは、通常、固定されるべき脊椎部分に対向して配置され、この一対のロッドには、ロッドの移動を防止したりロッドの剛性を高めるために、ロッド間を架橋して配置され、ロッド間を連結する連結器が取り付けられる(例えば、特許文献1参照)。 In addition, the rods are usually arranged so as to face the spinal portion to be fixed, and the pair of rods are arranged by bridging the rods in order to prevent the rods from moving or to increase the rigidity of the rods. Then, a coupler for connecting the rods is attached (see, for example, Patent Document 1).

特許文献1に示す連結器は、ボディに一対のロッドを収容する収容部を備え、この収容部には、ロッドに係合する係合部材が保持ピンによってスライド可能に保持され、係合部材は、ボディに設けられたロック機構によって係合部材に外力を加えて、係合部材をスライド移動することで係合部材をロッドに係合させてロッドを固定するものである。 The coupler shown in Patent Document 1 includes an accommodating portion for accommodating a pair of rods in the body, and an engaging member engaged with the rods is slidably held by a holding pin in the accommodating portion. An external force is applied to the engaging member by a lock mechanism provided on the body, and the engaging member is slid to move to engage the engaging member with the rod and fix the rod.

特許第4902539号公報Japanese Patent No. 4902539

ところで、この種の連結器は体内に配置されるため、部品の脱落等を考慮する必要があるものの、引用文献1に示す連結器のように、係合部材を保持ピン等によって結合する場合、保持ピンの脱落等が懸念される。 By the way, since this type of coupler is placed inside the body, it is necessary to consider the dropping of parts, etc. However, when the engaging member is coupled by a holding pin or the like as in the coupler shown in Cited Document 1, There is a concern that the holding pin may come off.

また、一般的に連結器は小型であるため、簡易な構成であって難易度の低い製造工程で製造されることが望ましく、さらには、設置操作が容易でロッドを確実に固定可能であることが求められる。 Further, since the coupler is generally small, it is desirable that the coupler is manufactured by a manufacturing process having a simple structure and a low degree of difficulty, and further, the installation operation is easy and the rod can be securely fixed. Is required.

そこで、本発明は上記問題を課題の一例として為されたもので、簡易な構成であって生産性の高い連結器を提供する。 Therefore, the present invention has been made by taking the above problem as an example of a problem, and provides a coupler having a simple configuration and high productivity.

上記課題を解決するため、本発明は次のような構成を採用する。なお、本発明の理解を容易にするため図面の参照符号を括弧書きで付するが、本発明はこれに限定されるものではない。 In order to solve the above problems, the present invention adopts the following configuration. Reference numerals in the drawings are given in parentheses to facilitate understanding of the present invention, but the present invention is not limited thereto.

すなわち、請求項に記載の連結器は、2つのロッドを受け入れ可能な溝部を有するボディと、前記各ロッドの周面に接し弾性変形可能な弾性体と、前記弾性体を弾性変形させ前記ロッドを固定する固定部材と、を備え、前記弾性体は、前記ボディに固定される固定端と、前記ロッドの一部を囲み、前記ボディ内部に配置される自由端と、を有し、前記自由端は、前記固定部材との接触により弾性変形する構成であり、前記弾性体は、前記ボディ内部の左右に設けられ、前記固定部材は、前記弾性体間に配置され、前記弾性体の自由端側は、前記固定部材と前記弾性体との間に設けられる係合機構を介して保持されていることを特徴とする。 That is , the coupler according to claim 1 has a body having a groove that can accept two rods, an elastic body that is in contact with the peripheral surface of each rod and can be elastically deformed, and the rod that is elastically deformed. The elastic body has a fixed end fixed to the body and a free end that surrounds a part of the rod and is arranged inside the body. The ends are configured to be elastically deformed by contact with the fixing member, the elastic bodies are provided on the left and right inside the body, the fixing members are arranged between the elastic bodies, and the free ends of the elastic body. The side is held via an engaging mechanism provided between the fixing member and the elastic body.

また、請求項に記載の連結器は、請求項に記載の連結器において、前記固定部材と前記弾性体との間には、前記弾性体の自由端側先端部を前記溝部の中心側に変位させる変位機構を備えていることを特徴とする。 The coupling of claim 2, in connector according to claim 1, wherein between the fixing member and the elastic body center side of the free end side end portion of the elastic body the groove It is characterized by being provided with a displacement mechanism that displaces in.

また、請求項に記載の連結器は、請求項1または2に記載の連結器において、前記固定部材は、前記弾性体を変位させない初期位置と前記弾性体を変位させ前記ロッドを固定する固定位置の間を移動可能に前記ボディに固定されていることを特徴とする。 Further, the coupler according to claim 3 is the coupler according to claim 1 or 2 , wherein the fixing member is fixed at an initial position where the elastic body is not displaced and a fixing which displaces the elastic body and fixes the rod. It is characterized in that it is fixed to the body so as to be movable between positions.

部品点数が少なく簡易な構成であって、ピンを打ち込む等の難易度の高い製造工程を必要としないため生産性を容易に高めることができる。また、少ない操作で確実且つ迅速にロッドを強固に固定することができる。 It has a simple structure with a small number of parts and does not require a highly difficult manufacturing process such as driving a pin, so that productivity can be easily increased. In addition, the rod can be firmly and quickly fixed with a small number of operations.

連結器の取付状態の一例を示す模式図である。It is a schematic diagram which shows an example of the mounting state of a coupler. 連結器の構成を示し、図2(a)は正面図、図2(b)は内部構造を示す模式図である。The configuration of the coupler is shown, FIG. 2A is a front view, and FIG. 2B is a schematic view showing an internal structure. ボディの内部構造を示す模式図である。It is a schematic diagram which shows the internal structure of a body. 弾性体の構成を示す模式図である。It is a schematic diagram which shows the structure of an elastic body. 固定部材の外観例を示す模式図である。It is a schematic diagram which shows the appearance example of a fixing member. 連結器の動作例を示し、図6(a)は連結器の組立例を説明するための模式図、図6(b)はロッドを固定する際の操作例を説明するための模式図である。An operation example of the coupler is shown, FIG. 6A is a schematic diagram for explaining an assembly example of the coupler, and FIG. 6B is a schematic diagram for explaining an operation example when fixing the rod. ..

以下、図面を参照して本発明の実施の形態について説明する。なお、以下に示す連結器1Aは、例えば、脊椎矯正手術において脊椎にスクリューを介して取り付けられる一対のロッド間を連結するために用いられる。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. The coupler 1A shown below is used, for example, to connect a pair of rods attached to the spine via a screw in spinal correction surgery.

図1に示すように、連結器1Aは、略平行に延びて配置されている一対の棒状の部材(以下、「ロッド2、2」と称する。)を固定するものであって、当該一対のロッド2、2の一部分に架け渡されて配置される。 As shown in FIG. 1, the coupler 1A fixes a pair of rod-shaped members (hereinafter, referred to as “rods 2 and 2”) arranged so as to extend substantially in parallel, and the pair of rod-shaped members. It is placed over a part of rods 2 and 2.

図1、及び図2に示すように、連結器1Aは、各ロッド2、2を受け入れて収容可能な溝部5、5を有するボディ10と、溝部5、5内において各ロッド2、2の周面に接して外力により弾性変形可能な弾性体20と、この弾性体20を弾性変形させて各ロッド2、2を固定する固定部材40と、を備える。 As shown in FIGS. 1 and 2, the coupler 1A has a body 10 having grooves 5 and 5 capable of receiving and accommodating the rods 2 and 2, and the circumferences of the rods 2 and 2 in the grooves 5 and 5. An elastic body 20 that is in contact with a surface and can be elastically deformed by an external force, and a fixing member 40 that elastically deforms the elastic body 20 to fix the rods 2 and 2 are provided.

図1及び図2に示すように、ボディ10は、外観が略直方体状に形成され、正面視において左右方向に細長く形成されており、溝部5、5は、図2に示すように、中央部を基準としてその左右に形成されている。溝部5の大きさや形状は、ロッド2の外形に合わせて略半円状の縁部を有して形成されている。 As shown in FIGS. 1 and 2, the body 10 is formed in a substantially rectangular parallelepiped shape in appearance, and is elongated in the left-right direction in a front view, and the groove portions 5 and 5 are central portions as shown in FIG. Is formed on the left and right sides of the reference. The size and shape of the groove portion 5 are formed to have a substantially semicircular edge portion according to the outer shape of the rod 2.

この2つの溝部5、5は、ボディ10の前後方向に略平行に延びて形成され、各溝部5、5の下端面には、ロッド2を受け入れるための開口部6を有している。開口部6は、例えば、その内側の幅よりも拡開し、ロッド2の外形より少し広く形成されている。ロッド2は、この拡開された開口部6によって溝部5に挿入し易くなっており、スムースに溝部5内へと挿入される。 The two groove portions 5, 5 are formed so as to extend substantially parallel to the front-rear direction of the body 10, and the lower end surface of each groove portion 5, 5 has an opening 6 for receiving the rod 2. The opening 6 is formed, for example, wider than the inner width thereof and slightly wider than the outer shape of the rod 2. The widened opening 6 makes it easy to insert the rod 2 into the groove 5, and the rod 2 is smoothly inserted into the groove 5.

なお、図1に示すように、連結器1Aは、この溝部5にロッド2が収容されると、ロッド2、2間には、ボディ10の中央部が介在することになる。したがって、ボディ10に形成される溝部5、5の位置は、ロッド2、2の間隔に応じて適宜設計され、溝部5の大きさは、ロッド2の直径に応じて適宜設計される。また、溝部5の形状は、溝部5内にロッド2の外形のほぼ全体を収容できれば、その形状は特に限定されるものではない。 As shown in FIG. 1, in the coupler 1A, when the rod 2 is accommodated in the groove 5, the central portion of the body 10 is interposed between the rods 2 and 2. Therefore, the positions of the groove portions 5 and 5 formed in the body 10 are appropriately designed according to the distance between the rods 2 and 2, and the size of the groove portions 5 is appropriately designed according to the diameter of the rod 2. Further, the shape of the groove portion 5 is not particularly limited as long as the entire outer shape of the rod 2 can be accommodated in the groove portion 5.

また、ボディ10の内部には、図2(b)及び図3に示すように、固定部材40が装着される孔部11と、弾性体20が装着される空洞部15が形成されている。孔部11は、溝部5に対してボディ10の反対側の上端面の中央部から鉛直下方向に延びて形成され、空洞部15は、この孔部11と連絡しボディ10を水平方向に横切るように形成されている。この空洞部15は、溝部5の周縁内側に沿って形成される第1の空間16と、この空間16から水平方向に延びて左右両側の端面に貫通して形成される第2の空間17と、を有する。 Further, as shown in FIGS. 2B and 3, a hole 11 on which the fixing member 40 is mounted and a cavity 15 on which the elastic body 20 is mounted are formed inside the body 10. The hole portion 11 is formed so as to extend vertically downward from the central portion of the upper end surface on the opposite side of the body 10 with respect to the groove portion 5, and the cavity portion 15 communicates with the hole portion 11 and horizontally crosses the body 10. It is formed like this. The cavity 15 includes a first space 16 formed along the inside of the peripheral edge of the groove 5, and a second space 17 extending horizontally from the space 16 and penetrating the end faces on both the left and right sides. , Have.

また、ボディ10の上端面左右には、ボディ10を把持する際に使用される図示しない第1のツールの先端部を挿入可能なツール挿入用孔部12、12が略鉛直方向に形成されている。第1のツールは、例えば、開閉操作可能な2つの先端部を備え、この2つの先端部をツール挿入用孔部12、12に差し込み、当該先端部を近接又は離反させる方向に外力を加える操作を行うことでボディ10を把持又は解放することが可能である。 Further, tool insertion holes 12 and 12 into which the tip of a first tool (not shown) used for gripping the body 10 can be inserted are formed on the left and right sides of the upper end surface of the body 10 in a substantially vertical direction. There is. The first tool includes, for example, two tip portions that can be opened and closed, and the two tip portions are inserted into the tool insertion holes 12 and 12, and an external force is applied in a direction in which the tip portions are brought close to each other or separated from each other. It is possible to grip or release the body 10 by performing the above.

なお、本実施形態において、ツール挿入用孔部12は、製造容易性を考慮して空洞部15と連絡しているが、特に空洞部15と連絡させる必要はない。 In the present embodiment, the tool insertion hole 12 is in contact with the cavity 15 in consideration of ease of manufacture, but it is not necessary to communicate with the cavity 15.

図2(b)に示すように、弾性体20は、ボディ10に固定される固定端20Aと、ロッド2の一部を囲み、ボディ10の第1の空間16に配置される自由端20Bと、を有し、自由端20Bは固定部材40との接触により弾性変形する。 As shown in FIG. 2B, the elastic body 20 includes a fixed end 20A fixed to the body 10 and a free end 20B that surrounds a part of the rod 2 and is arranged in the first space 16 of the body 10. , And the free end 20B is elastically deformed by contact with the fixing member 40.

具体的には、図4に示すように、この弾性体20は、弾性変形可能であって少なくとも前記ロッド2の断面の半分以上を囲む抱持部22と、抱持部22の外側に突出する突出部24と、を備える。 Specifically, as shown in FIG. 4, the elastic body 20 is elastically deformable and has a holding portion 22 that surrounds at least half of the cross section of the rod 2 and projects to the outside of the holding portion 22. A protrusion 24 and a protrusion 24 are provided.

なお、本実施形態では、ロッド2を抱持部22のみで固定することを想定しているために、抱持部22はロッド2の断面の半分以上を囲むものとしているが、例えば、抱持部22と溝部5の一部でロッド2を固定する場合には、ロッド2の断面の半分以上を囲む必要はなく、適宜設計されるものである。 In the present embodiment, since it is assumed that the rod 2 is fixed only by the holding portion 22, the holding portion 22 surrounds more than half of the cross section of the rod 2. For example, the holding portion 22 is held. When the rod 2 is fixed by a part of the portion 22 and the groove portion 5, it is not necessary to surround more than half of the cross section of the rod 2, and the rod 2 is appropriately designed.

抱持部22は、少なくともロッド2の周縁を囲むように湾曲して形成されたアーム25を備え、このアーム25は、空洞部15の第1の空間16に配置され、外力により弾性変形した際に内側面がロッド2の周面に接する。 The holding portion 22 includes an arm 25 formed so as to be curved so as to surround at least the peripheral edge of the rod 2, and the arm 25 is arranged in the first space 16 of the cavity portion 15 and is elastically deformed by an external force. The inner surface is in contact with the peripheral surface of the rod 2.

突出部24は、空洞部15の第2の空間17に挿入されて一定の接触面積にわたって接触し、この突出部24によって、弾性体20は空洞部15内に保持される。 The protrusion 24 is inserted into the second space 17 of the cavity 15 and comes into contact over a certain contact area, and the elastic body 20 is held in the cavity 15 by the protrusion 24.

そして、弾性体20は、突出部24側の周面が空洞部15に面接触により固定され、突出部24を含むアーム25の基端側が固定端20Aとして機能し、アーム25の先端側が自由端20Bとして機能してボディ10に保持される。 Then, in the elastic body 20, the peripheral surface on the protruding portion 24 side is fixed to the hollow portion 15 by surface contact, the base end side of the arm 25 including the protruding portion 24 functions as the fixed end 20A, and the tip end side of the arm 25 is the free end. It functions as 20B and is held by the body 10.

なお、アーム25は、少なくともアーム25の先端側が外力により弾性変形可能に材質や厚さ等が適宜規定され設計される。 The arm 25 is designed so that at least the tip end side of the arm 25 can be elastically deformed by an external force, and the material, thickness, and the like are appropriately specified.

また、図4に示すように、アーム25の内側面中央部25aには、その長さ方向に延びる幅広の溝27が形成されており、ロッド2は、このアーム25の内側面両側部25b、25bによって把持される。このように、アーム25は、ロッド2に対する接触面積を減少させることで単位面積当たりのロッド2への押圧力を大きくすることですべり強度を容易に向上させることが可能である。 Further, as shown in FIG. 4, a wide groove 27 extending in the length direction thereof is formed in the central portion 25a of the inner surface of the arm 25, and the rod 2 is formed on both side portions 25b of the inner surface of the arm 25. It is gripped by 25b. In this way, the arm 25 can easily improve the sliding strength by increasing the pressing force on the rod 2 per unit area by reducing the contact area with respect to the rod 2.

図2(b)及び図5に示すように、固定部材40は、ボディ10の孔部11に固定される頭部41と、この頭部41から鉛直下方に延びる軸部43とを備えている。この軸部43は頭部41よりも小径に形成され、その先端部には円周方向外側に突出する突出部45が設けられ、この突出部45の先端(下端)部は先端側に向かって尖る略円錐状に形成されている。 As shown in FIGS. 2B and 5, the fixing member 40 includes a head 41 fixed to the hole 11 of the body 10 and a shaft portion 43 extending vertically downward from the head 41. .. The shaft portion 43 is formed to have a diameter smaller than that of the head portion 41, and a protruding portion 45 projecting outward in the circumferential direction is provided at the tip portion thereof, and the tip end (lower end) portion of the protruding portion 45 is directed toward the tip end side. It is formed in a pointed, substantially conical shape.

また、固定部材40は、ボディ10の孔部11に挿入され、軸部43を弾性体20に接触させて抱持部22を変形させ、変形された抱持部22によってロッド2が圧着されて溝部5内に収容されたロッド2が固定される。 Further, the fixing member 40 is inserted into the hole 11 of the body 10, the shaft portion 43 is brought into contact with the elastic body 20 to deform the holding portion 22, and the rod 2 is crimped by the deformed holding portion 22. The rod 2 housed in the groove 5 is fixed.

頭部41には孔部11に形成される図示しないネジ溝(雌ネジ)と螺合可能なネジ溝(雄ネジ)41aが形成され、頭部41の所定方向の旋回によって螺合し、固定部材40が孔部11内を鉛直方向に進退可能に移動できるとともに孔部11に固定される。 A screw groove (female screw) (not shown) formed in the hole 11 and a screw groove (male screw) 41a that can be screwed are formed in the head 41, and the head 41 is screwed and fixed by turning in a predetermined direction. The member 40 can move in the hole 11 so as to be able to move forward and backward in the vertical direction, and is fixed to the hole 11.

なお、固定部材40は、弾性体20を変形させない初期位置と弾性体20を変形させロッドを固定する固定位置の間で移動できればよく、本実施形態のようにネジ式以外の方式を採用しても構わない。 The fixing member 40 only needs to be able to move between the initial position where the elastic body 20 is not deformed and the fixed position where the elastic body 20 is deformed and the rod is fixed, and a method other than the screw type is adopted as in the present embodiment. It doesn't matter.

また、頭部41の上端面にはボディ10に固定部材40を取り付ける際に使用される図示しない第2のツールと嵌合される嵌合部42が形成されている。第2のツールは、例えば、嵌合部42と合致する形状を有する先端部を備え、この先端部を当該嵌合部42に取り付けて所定の回転操作を行うことで、固定部材40を鉛直下方向に移動して軸部43を弾性体20に接触させることが可能である。 Further, a fitting portion 42 to be fitted with a second tool (not shown) used when attaching the fixing member 40 to the body 10 is formed on the upper end surface of the head 41. The second tool includes, for example, a tip portion having a shape that matches the fitting portion 42, and the fixing member 40 is vertically lowered by attaching the tip portion to the fitting portion 42 and performing a predetermined rotation operation. It is possible to move in the direction and bring the shaft portion 43 into contact with the elastic body 20.

また、図2(b)に示すように、固定部材40と弾性体20の間には2つの係合機構が設けられており、第1の係合機構は溝部5からの弾性体20の脱落を防止するものであり、第2の係合機構は弾性体20をロッド5側に変形させるものである。 Further, as shown in FIG. 2B, two engaging mechanisms are provided between the fixing member 40 and the elastic body 20, and the first engaging mechanism is the detachment of the elastic body 20 from the groove 5. The second engaging mechanism deforms the elastic body 20 toward the rod 5.

第1の係合機構は、固定部材40の軸部43の基端(頭部41)側に形成された溝50と、弾性体20の先端側に形成された第1の突起52と、を備え、溝50に第1の突起52を係合させて、弾性体20を空洞部15に保持させる。 The first engaging mechanism includes a groove 50 formed on the base end (head 41) side of the shaft portion 43 of the fixing member 40 and a first protrusion 52 formed on the tip end side of the elastic body 20. The first protrusion 52 is engaged with the groove 50 to hold the elastic body 20 in the cavity 15.

第1の突起52は、孔部11の内側に突出して形成され、第1の係合機構は、固定部材40の下方への移動により溝50に第1の突起52を係合させることで、溝50によって弾性体20の先端側を保持し、弾性体20の先端側と基端側が保持されることによって、ボディ10の溝部5の開口部6から弾性体20が脱落するのを防止する。 The first protrusion 52 is formed so as to project inside the hole 11, and the first engaging mechanism engages the first protrusion 52 with the groove 50 by moving the fixing member 40 downward. The groove 50 holds the tip end side of the elastic body 20, and the tip end side and the proximal end side of the elastic body 20 are held to prevent the elastic body 20 from falling out from the opening 6 of the groove portion 5 of the body 10.

溝50は、頭部41の下端面と軸部43の先端部に設けられた突出部45の上端面によって形成される2つの側壁50bと、軸部43の周面によって形成される底壁50aと、を備え、第1の突起52は、底壁50aに沿って移動可能に配置され、側壁50bによって形成される段差によってその移動が阻止される。 The groove 50 is formed by two side walls 50b formed by the lower end surface of the head portion 41 and the upper end surface of the protruding portion 45 provided at the tip end portion of the shaft portion 43, and a bottom wall 50a formed by the peripheral surface of the shaft portion 43. The first protrusion 52 is movably arranged along the bottom wall 50a, and the movement is blocked by a step formed by the side wall 50b.

第1の突起52の下端面と突出部45の上端面は、略水平に形成されており、互いの水平面が重なり合うことで、第1の突起52が溝50の段差を乗り越えにくい構造となっており、弾性体20の先端部が固定部材40から解放されて、ボディ10の溝部5からの弾性体20の脱落が防止される。 The lower end surface of the first protrusion 52 and the upper end surface of the protrusion 45 are formed substantially horizontally, and by overlapping the horizontal planes with each other, the first protrusion 52 has a structure that makes it difficult for the first protrusion 52 to get over the step of the groove 50. The tip of the elastic body 20 is released from the fixing member 40, and the elastic body 20 is prevented from falling off from the groove 5 of the body 10.

なお、図2に示すように、固定部材40の先端部と接触する弾性体20の先端側上面は、固定部材40側に向かって下方に傾斜する傾斜面を有し、固定部材40の軸部43の先端面は円錐状に形成された傾斜面を有しており、固定部材40が下方へと移動しやすい構造となっており、容易に第1の突起52を溝50に係合させることができる。 As shown in FIG. 2, the upper surface of the elastic body 20 in contact with the tip of the fixing member 40 has an inclined surface that inclines downward toward the fixing member 40, and the shaft portion of the fixing member 40. The tip surface of the 43 has an inclined surface formed in a conical shape, and the fixing member 40 has a structure that allows it to easily move downward, so that the first protrusion 52 can be easily engaged with the groove 50. Can be done.

また、溝50の鉛直方向の長さは、アーム25の弾性変形によって移動する第1の突起52の移動量によって適宜設計され、第1の突起52の鉛直方向の長さよりも長く形成される。 Further, the vertical length of the groove 50 is appropriately designed according to the amount of movement of the first protrusion 52 that moves due to the elastic deformation of the arm 25, and is formed longer than the vertical length of the first protrusion 52.

第2の係合機構(本願の変位機構)は、固定部材40の軸部43の先端部と、アーム25の先端に形成された第2の突起54と、を備えている。第2の突起54は、孔部11の内側に突出して形成され、第2の係合機構は、固定部材40の下方への移動により軸部43の先端部を第2の突起54に接触させて第2の突起54に軸力を加えることで、アーム25の先端部を弾性変形させて、アーム25をロッド5に圧着させてロッド5を固定する。 The second engaging mechanism (displacement mechanism of the present application) includes a tip portion of the shaft portion 43 of the fixing member 40 and a second protrusion 54 formed at the tip end of the arm 25. The second protrusion 54 is formed so as to project inside the hole portion 11, and the second engaging mechanism brings the tip end portion of the shaft portion 43 into contact with the second protrusion 54 by moving downward of the fixing member 40. By applying an axial force to the second protrusion 54, the tip of the arm 25 is elastically deformed, and the arm 25 is crimped to the rod 5 to fix the rod 5.

軸部43の先端部は、所定の角度に規定された傾斜面を有し、この傾斜面と接触する第2の突起54上端面(接触面)も上記軸部43の先端部に有する傾斜面と略同一の傾斜面を有する。これら傾斜面の傾斜角度は、好ましくは、固定部材40の下方への移動によって生じる軸力がロッド5の中心軸方向(溝部5の中心方向)に伝達されるように適宜設計される。 The tip portion of the shaft portion 43 has an inclined surface defined at a predetermined angle, and the upper end surface (contact surface) of the second protrusion 54 in contact with the inclined surface is also provided on the tip portion of the shaft portion 43. Has substantially the same inclined surface as. The inclination angles of these inclined surfaces are preferably appropriately designed so that the axial force generated by the downward movement of the fixing member 40 is transmitted in the central axial direction of the rod 5 (the central direction of the groove portion 5).

したがって、アーム25の先端部は、ロッド5の中心軸方向に変位するとともに、固定部材40によって生じる軸力がアーム25の先端部に伝達され、ロッド2に圧着される。 Therefore, the tip of the arm 25 is displaced in the direction of the central axis of the rod 5, and the axial force generated by the fixing member 40 is transmitted to the tip of the arm 25 and is crimped to the rod 2.

次に、連結器1Aの組立方法について詳述する。 Next, the method of assembling the coupler 1A will be described in detail.

まず、ボディ10に弾性体20を取り付ける際には、ボディ10に形成される開口部6から第2の空間17内に突出部24を挿入して、弾性体20を基端側を支点として回旋し、抱持部22を第1の空間16内に配置する。 First, when the elastic body 20 is attached to the body 10, the protruding portion 24 is inserted into the second space 17 from the opening 6 formed in the body 10, and the elastic body 20 is rotated around the base end side as a fulcrum. Then, the holding portion 22 is arranged in the first space 16.

次に、利用者によって図示しない第2のツールが固定部材40の嵌合部42に取り付けられて操作され、図6(a)に示すように、固定部材40を孔部11から挿入して下方へと移動し、軸部43の先端部を第1の突起52に接触させて弾性体20の先端側を弾性変形させ、軸部43の先端部が第1の突起52を乗り越え、第1の突起52が溝50に配置されるまで固定部材40を下方へと移動させる。 Next, a second tool (not shown) is attached and operated by the user to the fitting portion 42 of the fixing member 40, and as shown in FIG. 6A, the fixing member 40 is inserted through the hole portion 11 and lowered. The tip of the shaft 43 is brought into contact with the first protrusion 52 to elastically deform the tip side of the elastic body 20, the tip of the shaft 43 gets over the first protrusion 52, and the first The fixing member 40 is moved downward until the protrusion 52 is arranged in the groove 50.

これにより、弾性体20は、基端側が第2の空間17に挿入されてボディ10に固定され、先端側の第1の突起52が溝50に配置されて固定部材40に係合して保持されるするため、開口部6からの弾性体20の脱落が防止される。 As a result, the elastic body 20 is fixed to the body 10 by inserting the base end side into the second space 17, and the first protrusion 52 on the tip end side is arranged in the groove 50 to engage with and hold the fixing member 40. Therefore, the elastic body 20 is prevented from falling out from the opening 6.

次に、連結器1Aによるロッド2の固定方法について詳述する。 Next, a method of fixing the rod 2 by the coupler 1A will be described in detail.

まず、利用者によって図示しない第1のツールが操作され、第1のツールの先端部がツール挿入用孔部12内に挿入されて、ボディ10が把持され、ロッド2の所定の位置において、溝部5にロッド2が挿入されてボディ10が配置される。 First, a first tool (not shown) is operated by the user, the tip of the first tool is inserted into the tool insertion hole 12, the body 10 is gripped, and the groove portion is formed at a predetermined position of the rod 2. The rod 2 is inserted into 5 and the body 10 is arranged.

次に、図示しない第2のツールが固定部材40の嵌合部42に取り付けられて利用者によって回転操作される。固定部材40が初期位置から固定位置まで下方に移動されることによって、図6(b)に示すように、軸部43の先端部は第2の突起54に接触し、更に固定部材40が下方に押し込まれることによって、抱持部22を変形させる。このようにして、本実施形態の連結器1Aは、固定部材40に加わる軸力がアーム25の先端部に伝達されることによって、アーム25の先端部を変形させてアーム25をロッド2圧着させることでロッド2を固定する。 Next, a second tool (not shown) is attached to the fitting portion 42 of the fixing member 40 and is rotated by the user. By moving the fixing member 40 downward from the initial position to the fixed position, as shown in FIG. 6B, the tip end portion of the shaft portion 43 comes into contact with the second protrusion 54, and the fixing member 40 further lowers. By being pushed into, the holding portion 22 is deformed. In this way, in the coupler 1A of the present embodiment, the axial force applied to the fixing member 40 is transmitted to the tip end portion of the arm 25, so that the tip end portion of the arm 25 is deformed and the arm 25 is crimped to the rod 2. This fixes the rod 2.

以上に説明したように、本実施形態の連結器1Aは、2つのロッド2、2を受け入れ可能な溝部5、5を有するボディ10と、各ロッド2、2の周面に接し弾性変形可能な弾性体20と、この弾性体20を弾性変形させロッド2、2を溝部5、5内に固定する固定部材40と、を備えている。 As described above, the coupler 1A of the present embodiment is elastically deformable in contact with the body 10 having grooves 5 and 5 capable of accepting the two rods 2 and 2 and the peripheral surfaces of the rods 2 and 2. An elastic body 20 and a fixing member 40 that elastically deforms the elastic body 20 and fixes the rods 2 and 2 in the grooves 5 and 5 are provided.

このように、連結器1Aは、部品点数が少なく簡易な構成であって、ピンを打ち込む等の難易度の高い製造工程を必要としないため生産性を容易に高めることができる。また、少ない操作で確実且つ迅速にロッド2を強固に固定することができる。 As described above, the coupler 1A has a simple structure with a small number of parts, and does not require a highly difficult manufacturing process such as driving a pin, so that the productivity can be easily increased. In addition, the rod 2 can be firmly and quickly fixed with a small number of operations.

なお、上記実施の形態では固定部材40の軸部43の先端部に設けた突出部45は一例であって、弾性体20の抱持部22を変形させてロッド2に抱持部22を圧着可能であれば、その形態は適宜変更することができる。 In the above embodiment, the protruding portion 45 provided at the tip of the shaft portion 43 of the fixing member 40 is an example, and the holding portion 22 of the elastic body 20 is deformed and the holding portion 22 is crimped to the rod 2. If possible, the form can be changed as appropriate.

また、本実施形態では、抱持部22のみによってロッド2を固定しているが、抱持部22の先端部を変形させて、溝5の一部にロッド2を押し付けて固定するようにしてもかまわない。この場合、抱持部22は、ロッド2の周縁1/2以上を覆う必要はなく、その長さは適宜設定される。 Further, in the present embodiment, the rod 2 is fixed only by the holding portion 22, but the tip portion of the holding portion 22 is deformed so that the rod 2 is pressed against a part of the groove 5 to be fixed. It doesn't matter. In this case, the holding portion 22 does not need to cover the peripheral edge 1/2 or more of the rod 2, and its length is appropriately set.

1A…連結器
10…ボディ
20…弾性体
20A…固定端
20B…自由端
25…アーム
40…固定部材
50、52…係合機構
45、54…変位機構
1A ... Coupler 10 ... Body 20 ... Elastic body 20A ... Fixed end 20B ... Free end 25 ... Arm 40 ... Fixed member 50, 52 ... Engagement mechanism 45, 54 ... Displacement mechanism

Claims (3)

2つのロッドを受け入れ可能な溝部を有するボディと、
前記各ロッドの周面に接し弾性変形可能な弾性体と、
前記弾性体を弾性変形させ前記ロッドを固定する固定部材と、
を備え、
前記弾性体は、前記ボディに固定される固定端と、前記ロッドの一部を囲み、前記ボディ内部に配置される自由端と、を有し、前記自由端は、前記固定部材との接触により弾性変形する構成であり、
前記弾性体は、前記ボディ内部の左右に設けられ、前記固定部材は、前記弾性体間に配置され、前記弾性体の自由端側は、前記固定部材と前記弾性体との間に設けられる係合機構を介して保持されていることを特徴とする連結器。
A body with a groove that can accept two rods,
An elastic body that is in contact with the peripheral surface of each rod and can be elastically deformed,
A fixing member that elastically deforms the elastic body and fixes the rod,
With
The elastic body has a fixed end fixed to the body and a free end that surrounds a part of the rod and is arranged inside the body, and the free end is brought into contact with the fixing member. It has a structure that elastically deforms.
The elastic body is provided on the left and right inside the body, the fixing member is arranged between the elastic bodies, and the free end side of the elastic body is provided between the fixing member and the elastic body. A coupler characterized by being held via a coupling mechanism.
前記固定部材と前記弾性体との間には、前記弾性体の自由端側先端部を前記溝部の中心側に変位させる変位機構を備えていることを特徴とする請求項に記載の連結器。 The coupler according to claim 1 , further comprising a displacement mechanism between the fixing member and the elastic body that displaces the tip end portion of the elastic body on the free end side toward the center side of the groove portion. .. 前記固定部材は、前記弾性体を変位させない初期位置と前記弾性体を変位させ前記ロッドを固定する固定位置の間を移動可能に前記ボディに固定されていることを特徴とする請求項1または2に記載の連結器。 Claim 1 or 2 is characterized in that the fixing member is movably fixed to the body between an initial position in which the elastic body is not displaced and a fixed position in which the elastic body is displaced and the rod is fixed. The coupler described in.
JP2017079208A 2017-04-12 2017-04-12 Coupler Active JP6889907B2 (en)

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US6602253B2 (en) * 2001-02-12 2003-08-05 Marc Richelsoph Rod to rod connector
AU2002368220A1 (en) * 2002-09-04 2004-03-29 Aesculap Ag And Co. Kg Orthopedic fixation device
JP4472431B2 (en) * 2004-06-08 2010-06-02 株式会社ピカコーポレイション Clamp spacer and clamp
CN100471463C (en) * 2005-01-18 2009-03-25 斯恩蒂斯有限公司 Angularly stable device for mutually fixing a longitudinal carrier to a bone fixing element
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