WO2021039049A1 - Pin cutting tool - Google Patents

Pin cutting tool Download PDF

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Publication number
WO2021039049A1
WO2021039049A1 PCT/JP2020/023947 JP2020023947W WO2021039049A1 WO 2021039049 A1 WO2021039049 A1 WO 2021039049A1 JP 2020023947 W JP2020023947 W JP 2020023947W WO 2021039049 A1 WO2021039049 A1 WO 2021039049A1
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WO
WIPO (PCT)
Prior art keywords
opening
pin
state
operation unit
tool
Prior art date
Application number
PCT/JP2020/023947
Other languages
French (fr)
Japanese (ja)
Inventor
啓吾 浅海
木村　淳一
Original Assignee
株式会社トータルメディカルサプライ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社トータルメディカルサプライ filed Critical 株式会社トータルメディカルサプライ
Priority to JP2021542035A priority Critical patent/JP7497062B2/en
Publication of WO2021039049A1 publication Critical patent/WO2021039049A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B13/00—Hand shears; Scissors
    • B26B13/06—Hand shears; Scissors characterised by the shape of the blades

Definitions

  • the present invention relates to a pin cutting tool for cutting a pin.
  • the tension band wiring method is known as an example of a method for treating or treating a fracture when a bone near the joint such as the elbow head, knee, ankle, or wrist, or a bone far from the joint is fractured.
  • a pin as a fixture is inserted into the bone to fix it, and a wire or cable inserted into a ring provided on the fixture is passed through an insertion hole drilled in the bone, and then the wire or cable is inserted. Tighten and give tension. After that, the excess pin of the fixture is cut by using a pin cutting tool such as a nipper.
  • the above-mentioned ring is inserted through the pin as a fixture.
  • the ring may be fixed to the pin by caulking, or the movement of the ring may be restricted by a friction member attached to the pin.
  • the pin When a pin cutting tool such as nippers is used, the pin can usually be cut neatly so that burrs do not protrude from the cut surface of the pin. Therefore, there is no protrusion at the end of the cut pin, and when a large force is applied to the ring, the ring may come off from the end of the pin.
  • Such a problem is not limited to the cutting of the pin used in the tension band wiring method, and may occur when the pin into which an arbitrary member is inserted is cut.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a pin cutting tool capable of preventing a member inserted through a pin from falling out of the pin.
  • the pin cutting tool is a tool for cutting a pin, and includes a first operation unit and a second operation unit.
  • a first opening is formed in the first operating portion.
  • the second operation unit has a second opening and is movable relative to the first operation unit.
  • the first opening and the second opening can be inserted with the pin in the first state facing each other, and by inserting the pin in the first state and then moving the pin relative to the second state, the pin can be inserted. Can be disconnected.
  • An expansion portion that expands the first opening in a direction in which the second opening moves relative to the second state from the first state is formed on the peripheral edge portion of the first opening on the side of the second opening. ..
  • the pin in the first state in which the first opening and the second opening face each other, the pin is inserted through the first opening and the second opening, and then the pin is relatively moved to the second state. Can be disconnected. At this time, with the relative movement from the first state to the second state, the end portion of the cut pin is deformed and enters the expansion portion that expands the first opening. As a result, a protrusion can be intentionally formed at the end of the cut pin. This protrusion can prevent the member inserted through the pin from falling out of the pin.
  • the first opening may be formed by a notch formed in the first operation portion.
  • the end of the pin after cutting may be removable through the notch.
  • the first opening may be larger than the second opening.
  • the end of the pin after cutting may be able to be taken out in a direction parallel to the axial direction of the first opening.
  • the second operation portion is formed with a protrusion that moves toward the expansion portion side in the first opening when the second opening moves relative to the second state from the first state. You may be.
  • the end of the pin when the second opening moves relative to the second state from the first state, the end of the pin is moved toward the expansion portion side by the protrusion moving in the first opening toward the expansion portion side. Can be pressed to. As a result, the end portion of the pin can be deformed with a stronger force, so that a protrusion can be satisfactorily formed at the end portion of the cut pin.
  • the first operation unit and the second operation unit may each have facing surfaces facing each other. In this case, the relative movement of the first operation unit and the second operation unit is performed on the facing surface of the first operation unit and the facing surface of the second operation unit in the first state and the second state.
  • a stopper mechanism may be provided to regulate each state.
  • each of the first operation unit and the second operation unit has a stopper mechanism for regulating the relative movement of the first operation unit and the second operation unit in the first state and the second state, respectively. It can be built in the facing surface.
  • a protrusion can be intentionally formed at the end of the cut pin, it is possible to prevent the member inserted through the pin from falling out of the pin by this protrusion.
  • FIG. 1A is a cross-sectional view taken along the line AA of the tool in FIG. 1A. It is a top view of the tool when the 1st grip part and the 2nd grip part are brought close to each other.
  • FIG. 2B is a sectional view taken along line BB of the tool in FIG. 2A. It is sectional drawing of the tool in the 1st state, and shows the state in which a pin is inserted. It is sectional drawing of the tool in the 2nd state, and shows the state in which the inserted pin is cut.
  • the pin cutting tool 100 (hereinafter, simply referred to as “tool 100”) according to the present embodiment is a tool for cutting a pin used for fixing by the tension band wiring method.
  • the diameter of the pin is, for example, about 1 to 3 mm, but is not limited to this.
  • the tool 100 can also cut pins used for other purposes.
  • FIG. 1A is a plan view of the tool 100.
  • FIG. 1B is a side view of the tool 100.
  • FIG. 1C is a bottom view of the tool 100.
  • FIG. 1D is a sectional view taken along the line AA of the tool 100 in FIG. 1A.
  • the tool 100 includes a first operation unit 1 and a second operation unit 2 that can move relative to each other.
  • the first operation unit 1 and the second operation unit 2 are relatively rotatable around the rotation shaft 3.
  • the configuration is not limited to such a configuration, and the first operation unit 1 and the second operation unit 2 may be configured to be relatively movable in other modes such as sliding instead of rotation.
  • the first operation unit 1 is formed with a first opening 11 through which a pin is inserted.
  • the first opening 11 is composed of a notch 10 formed in the first operation unit 1. That is, the first opening 11 is composed of a part of the notch 10 formed in a concave shape from the peripheral edge portion of the first operating portion 1.
  • the notch 10 is formed so as to extend in the radial direction about the rotation shaft 3, and the bottom portion of the notch 10 constitutes the first opening 11.
  • the second operation unit 2 is formed with a second opening 21 through which a pin is inserted.
  • the second opening 21 is, for example, circular, and its inner diameter is slightly larger than the outer diameter of the pin.
  • first state the first opening 11 and the second opening 21 face each other, and a pin can be inserted through the first opening 11 and the second opening 21. That is, in the states of FIGS. 1A to 1D, the central axis L1 of the first opening 11 and the central axis L2 of the second opening 21 are located coaxially, and pins are inserted along these central axes L1 and L2. can do.
  • the first operation unit 1 is provided with a first grip unit 12 for the user to grip. Further, the second operation unit 2 is also provided with a second grip unit 22 for the user to grip. The user grips both the first grip portion 12 and the second grip portion 22 with one hand, and grips the first grip portion 12 and the second grip portion 22 so as to be close to each other. As a result, the first operation unit 1 and the second operation unit 2 can be relatively rotated around the rotation shaft 3.
  • the first grip portion 12 and the second grip portion 22 are connected via a leaf spring 4, which is an example of an elastic body.
  • a force is applied to the leaf spring 4 in a direction in which the first grip portion 12 and the second grip portion 22 are brought close to each other, the leaf spring 4 shows the first grip portion 12 and the second grip portion 22 against the force.
  • An elastic force is applied in the direction of returning to the state of 1A to 1D.
  • the leaf spring 4 is not limited to the configuration in which the first grip portion 12 and the second grip portion 22 are connected, and may be configured to connect other portions of the first operation portion 1 and the second operation portion 2. .
  • the structure is not limited to the leaf spring 4, and other elastic bodies such as rubber may be provided.
  • a stopper 5 is provided on each of the first grip portion 12 and the second grip portion 22.
  • the stoppers 5 come into contact with each other, so that the relative rotation of the first operation unit 1 and the second operation unit 2 is restricted within a certain amount. Will be done.
  • the stopper 5 is not limited to the configuration provided in the first grip portion 12 and the second grip portion 22, and may be provided in other portions of the first operation unit 1 and the second operation unit 2. Further, the stopper 5 may be provided on either the first operation unit 1 or the second operation unit 2, or may be omitted.
  • FIG. 2A is a plan view of the tool 100 when the first grip portion 12 and the second grip portion 22 are brought close to each other.
  • FIG. 2B is a sectional view taken along line BB of the tool 100 in FIG. 2A.
  • the first opening 11 and the second opening 21 do not face each other. That is, in the states of FIGS. 2A and 2B, the central axis L1 of the first opening 11 and the central axis L2 of the second opening 21 are not located coaxially.
  • an expansion portion 111 that extends the first opening 11 is formed on the peripheral edge portion of the first opening 11 on the side of the second opening 21.
  • the expansion portion 111 extends in the direction D in which the second opening 21 moves relative to the state shown in FIG. 1D (first state) to the state shown in FIG. 2B (second state), so that the first opening 11 extends in the direction D. Is being extended.
  • the first opening 11 has an inner diameter larger than that of the other portions in the expansion portion 111.
  • the depth of the expansion portion 111 along the central axis L1 of the first opening 11 is 1/3 to 1/2 of the length along the central axis L1 of the first opening 11. , Not limited to this.
  • a step portion 112 extending in the direction opposite to the direction D is formed on the peripheral edge portion of the first opening 11 on the side of the second opening 21.
  • the depth of the step portion 112 along the central axis L1 of the first opening 11 is about the same as the depth of the expansion portion 111.
  • the height of the protrusion 23 is about the same as the depth of the expansion portion 111.
  • the protrusion 23 moves in the step portion 112 along the direction D when the second opening 21 moves relative to the state shown in FIG. 1D (first state) to the state shown in FIG. 2B (second state). Then, as shown in FIG. 2B, the protrusion 23 moves in the first opening 11 toward the expansion portion 111 side. That is, in the state of FIG. 2B, the protrusion 23 enters the region where the pin is inserted in the first opening 11.
  • FIG. 3A is a cross-sectional view of the tool 100 in the first state, showing a state in which the pin 200 is inserted.
  • FIG. 3B is a cross-sectional view of the tool 100 in the second state, showing a state in which the inserted pin 200 is cut.
  • the pin 200 is made of metal, for example, and extends in a straight line before cutting.
  • a member 300 such as a ring used in the tension band wiring method is inserted through the pin 200.
  • the member 300 may be fixed to the pin 200 by caulking, or the movement of the member 300 may be restricted by a friction member (not shown) attached to the pin 200.
  • the member 300 may be slidable with respect to the pin 200.
  • the central axis L1 of the first opening 11 and the central axis L2 of the second opening 21 are located coaxially, and the pin 200 is inserted along these central axes L1 and L2. .. Specifically, the tip of the pin 200 is inserted from the first opening 11 to the second opening 21 from the lower side to the upper side in FIG. 3A. At this time, the protrusion 23 is retracted to a position where it does not interfere with the pin 200 to be inserted.
  • the cut pin 200 is separated into a first portion 201 on the first opening 11 side and a second portion 202 on the second opening 21 side.
  • the member 300 inserted through the pin 200 is located in the first portion 201 of the pin 200.
  • the end of the first portion 201 of the pin 200 is deformed in the direction D in which the second opening 21 moves relative to the first opening 11 and enters the expansion portion 111 that expands the first opening 11.
  • a protrusion 203 projecting in the direction D is formed at the end of the first portion 201 of the pin 200.
  • the protrusion 23 moves in the step portion 112 along the direction D, and the pin 200 in the first opening 11 is inserted.
  • the protrusion 23 enters the area.
  • the protrusion 23 comes into contact with the end of the first portion 201 of the cut pin 200 and presses the end toward the extension 111.
  • the protrusion 203 expands even if the first portion 201 of the pin 200 is pulled out along the central axis L1 of the first opening 11 as it is. It gets caught in the part 111.
  • the first opening 11 is composed of the notch 10
  • the first portion 201 of the pin 200 is moved in a plane orthogonal to the central axis L1 of the first opening 11 to cut the first opening 11. The end of the first portion 201 of the pin 200 can be removed through the notch 10.
  • the expansion portion 111 fills the inside of the first opening 11.
  • the end of the pin 200 can be pressed toward the expansion portion 111 by the protrusion 23 that moves toward the side.
  • the end portion of the pin 200 can be deformed with a stronger force, so that the protrusion 203 can be satisfactorily formed at the end portion of the cut pin 200.
  • FIG. 4A is a bottom view showing a first deformation example of the tool 100, and the first grip portion 12, the second grip portion 22, and the like are omitted.
  • the notch 10 is formed so as to extend in the radial direction about the rotation shaft 3, but in this example, the notch 10 extends in a direction intersecting the radial direction.
  • the bottom of the notch 10 constitutes the first opening 11.
  • the end portion of the pin 200 can be easily taken out through the notch 10 constituting the first opening 11.
  • the notch 10 has a configuration in which the first opening 11 is opened and the end portion of the pin 200 can be taken out from the first opening 11, the direction and shape in which the notch 10 extends are limited. Not done.
  • FIG. 4B is a bottom view showing a second modification of the tool 100, in which the first grip portion 12, the second grip portion 22, and the like are omitted.
  • the first opening 11 is not formed by the notch 10, but the first opening 11 is formed by the elongated hole. Therefore, the first opening 11 is larger than the second opening 21, and the end portion of the cut pin 200 can be moved within the first opening 11.
  • the direction in which the elongated holes constituting the first opening 11 extend is arbitrary.
  • the first opening 11 is not limited to the elongated hole, and may have a circular shape having a diameter larger than that of the second opening 21, or may have a shape other than the circular shape.
  • FIGS. 5A and 5B are perspective views showing a third modification of the tool 100.
  • FIG. 5A shows only a part of the configuration of the first operation unit 1
  • FIG. 5B shows only a part of the configuration of the second operation unit 2.
  • the upper surface of the first operation unit 1 in FIG. 5A constitutes a facing surface 13 facing the second operation unit 2. Further, the upper surface of the second operation unit 2 in FIG. 5B constitutes a facing surface 24 facing the first operation unit 1. That is, the first operation unit 1 and the second operation unit 2 are combined in a state where the facing surfaces 13 and 24 face each other. At this time, the rotating shaft 3 formed so as to protrude from the facing surface 13 of the first operating unit 1 is fitted into the recess 31 formed in the facing surface 24 of the second operating unit 2, whereby the rotating shaft 3 is fitted.
  • the first operation unit 1 and the second operation unit 2 are relatively rotatable around the above.
  • the first operation unit 1 is formed with two first openings 11 through which pins are inserted.
  • Each of the first openings 11 (first opening 110 and first opening 120) is formed by notches extending in the radial direction with respect to the rotation shaft 3, respectively, as in the above embodiment.
  • the first opening 110 and the first opening 120 are formed side by side with a distance from each other in the circumferential direction centered on the rotation axis 3.
  • the second operation unit 2 is formed with two second openings 21 through which pins are inserted, which is the same number as the first opening 11.
  • Each of the second openings 21 (second opening 210 and second opening 220) is circular, as in the above embodiment.
  • the second opening 210 and the second opening 220 are formed side by side with a distance from each other in the circumferential direction centered on the rotation axis 3. The distance between the second opening 210 and the second opening 220 coincides with the distance between the first opening 110 and the first opening 120.
  • the second opening 210 and the second opening 220 have different inner diameters from each other. Specifically, the second opening 220 has a larger inner diameter than the second opening 210.
  • the second opening 210 is formed, for example, with an inner diameter of 1.65 mm, and is suitable for inserting a pin having an outer diameter of 1.6 mm.
  • the second opening 220 is formed, for example, with an inner diameter of 2.05 mm, and is suitable for inserting a pin having an outer diameter of 2.0 mm.
  • the first opening 110 faces the second opening 210, and a pin having a relatively small diameter inserted through the second opening 210 is also inserted through the first opening 110 communicating with the second opening 210.
  • the first opening 120 faces the second opening 220, and a relatively large-diameter pin inserted through the second opening 220 is also inserted through the first opening 120 communicating with the second opening 220.
  • Expansion portions 111 are formed in the first opening 110 and the first opening 120 as in the above embodiment. Each of the expansion portions 111 expands the first opening 110 and the first opening 120 in the circumferential direction about the rotation axis 3.
  • the expansion portion 111 formed in the first opening 110 has a shorter expansion amount (length in the circumferential direction) in the circumferential direction than the expansion portion 111 formed in the first opening 120. That is, the expansion portion 111 having a relatively small expansion amount is formed in the first opening 110 having a relatively small outer diameter of the pin to be inserted, and the first opening 120 having a relatively large outer diameter of the pin to be inserted.
  • the expansion portion 111 having a relatively large expansion amount is formed in. As described above, it is preferable that the expansion amount of the expansion portion 111 corresponds to the outer diameter of the pin inserted into the second opening 21 (second opening 210 and second opening 220).
  • the number of the first opening 11 and the second opening 21 is not limited to one, and two or more of each may be formed.
  • the expansion portion 111 is formed in each of the plurality of first openings 11.
  • Each expansion portion 111 is formed so as to expand each first opening 11 in the same direction toward one direction in the circumferential direction centered on the rotation axis 3.
  • a convex portion 130 is formed on the facing surface 13 of the first operation unit 1. Further, a recess 230 is formed on the facing surface 24 of the second operation unit 2. When the first operation unit 1 and the second operation unit 2 are combined with the facing surfaces 13 and 24 facing each other, the convex portion 130 enters the concave portion 230.
  • the concave portion 230 extends in the circumferential direction centered on the rotating shaft 3, and when the first operating portion 1 and the second operating portion 2 rotate relative to the rotating shaft 3, the concave portion 130 is inside the concave portion 230. Moves in the circumferential direction.
  • the convex portion 130 and the concave portion 230 form a stopper mechanism 30 for restricting the relative movement of the first operation unit 1 and the second operation unit 2 in the first state and the second state, respectively.
  • the configuration is not limited to the configuration in which the convex portion 130 is formed in the first operation portion 1 and the concave portion 230 is formed in the second operation portion 2, but the convex portion 130 is formed in the second operation portion 2 and the concave portion 230 is the first.
  • the configuration may be formed in the operation unit 1.
  • the stopper mechanism 30 is not limited to the one composed of the convex portion and the concave portion, and any other configuration can be adopted.
  • the convex portion 130 is provided between the two first openings 11 (first opening 110 and first opening 120) in the circumferential direction centered on the rotation shaft 3, and the two second openings 21 ( A recess 230 is provided between the second opening 210 and the second opening 220).
  • the present invention is not limited to such a configuration, and the stopper mechanism 30 may be provided at a position different from the above example on the facing surfaces 13 and 24 of the first operation unit 1 and the second operation unit 2.
  • the protrusion 23 is not formed on the second operation unit 2. In this way, the protrusion 23 can be omitted.

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Abstract

A first opening 11 is formed in a first operation part 1. A second opening 21 is formed in a second operation part 2 which is movable relative to the first operation part 1. The first opening 11 and the second opening 21 enable insertion of a pin therethrough while being in a first state where both face each other, and move relative to each other in a second state after the insertion of the pin in the first state to thereby cut the pin. An expansion part 111 that expands the first opening 11 in a direction D in which the second opening 21 moves relatively from the first state to the second state is formed in the peripheral edge, on the second opening 21 side, of the first opening 11.

Description

ピン切断用工具Pin cutting tool
　本発明は、ピンを切断するためのピン切断用工具に関するものである。 The present invention relates to a pin cutting tool for cutting a pin.
　尺骨肘頭部、膝、足首、手首などの関節に近接する骨、あるいは関節から遠い骨などが骨折した場合に、骨折を治療又は処置する手法の一例として、テンションバンドワイヤリング法が知られている（例えば、下記特許文献１及び２参照）。この手法では、固定具としてのピンを骨に挿入して固定し、当該固定具に設けられたリングに挿入させたワイヤーまたはケーブルを、骨に穿孔した挿通孔に通した後、ワイヤーまたはケーブルを引き締めてテンションを付与する。その後、ニッパーなどのピン切断用工具を用いて、固定具の余ったピンが切断される。 Ulna The tension band wiring method is known as an example of a method for treating or treating a fracture when a bone near the joint such as the elbow head, knee, ankle, or wrist, or a bone far from the joint is fractured. (See, for example, Patent Documents 1 and 2 below). In this method, a pin as a fixture is inserted into the bone to fix it, and a wire or cable inserted into a ring provided on the fixture is passed through an insertion hole drilled in the bone, and then the wire or cable is inserted. Tighten and give tension. After that, the excess pin of the fixture is cut by using a pin cutting tool such as a nipper.
　固定具としてのピンには、上述のリングが挿通されている。リングは、かしめられることによりピンに固定されてもよいし、ピンに取り付けられた摩擦部材によりリングの移動が制限されてもよい。 The above-mentioned ring is inserted through the pin as a fixture. The ring may be fixed to the pin by caulking, or the movement of the ring may be restricted by a friction member attached to the pin.
特開２０１８−１０２５２７号公報JP-A-2018 − 102527 特許第６４２０５１０号公報Japanese Patent No. 6420510
　ニッパーなどのピン切断用工具を用いた場合、通常、ピンの切断面からバリが突出しないように、ピンを綺麗に切断することができる。そのため、切断されたピンの端部には突出物がなく、リングに大きな力が加わったときには、ピンの端部からリングが抜け落ちる可能性があった。このような問題は、テンションバンドワイヤリング法に用いられるピンの切断に限らず、任意の部材が挿通されたピンを切断した場合に生じ得る。 When a pin cutting tool such as nippers is used, the pin can usually be cut neatly so that burrs do not protrude from the cut surface of the pin. Therefore, there is no protrusion at the end of the cut pin, and when a large force is applied to the ring, the ring may come off from the end of the pin. Such a problem is not limited to the cutting of the pin used in the tension band wiring method, and may occur when the pin into which an arbitrary member is inserted is cut.
　本発明は、上記実情に鑑みてなされたものであり、ピンに挿通された部材がピンから抜け落ちるのを防止することができるピン切断用工具を提供することを目的とする。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a pin cutting tool capable of preventing a member inserted through a pin from falling out of the pin.
（１）本発明に係るピン切断用工具は、ピンを切断するための工具であって、第１操作部と、第２操作部とを備える。前記第１操作部には、第１開口が形成されている。前記第２操作部は、第２開口が形成され、前記第１操作部に対して相対移動可能である。前記第１開口及び前記第２開口は、互いに対向した第１状態で前記ピンを挿通可能であり、前記第１状態で前記ピンを挿通させてから第２状態に相対移動させることにより、前記ピンを切断することができる。前記第１開口における前記第２開口側の周縁部には、前記第２開口が前記第１状態から前記第２状態に相対移動する方向に前記第１開口を拡張する拡張部が形成されている。 (1) The pin cutting tool according to the present invention is a tool for cutting a pin, and includes a first operation unit and a second operation unit. A first opening is formed in the first operating portion. The second operation unit has a second opening and is movable relative to the first operation unit. The first opening and the second opening can be inserted with the pin in the first state facing each other, and by inserting the pin in the first state and then moving the pin relative to the second state, the pin can be inserted. Can be disconnected. An expansion portion that expands the first opening in a direction in which the second opening moves relative to the second state from the first state is formed on the peripheral edge portion of the first opening on the side of the second opening. ..
　このような構成によれば、第１開口及び第２開口が互いに対向した第１状態において、第１開口及び第２開口にピンを挿通させ、その後に第２状態に相対移動させることにより、ピンを切断することができる。このとき、第１状態から第２状態への相対移動に伴って、切断されたピンの端部が変形して、当該第１開口を拡張する拡張部内に入り込む。その結果、切断されたピンの端部に意図的に突出物を形成することができる。この突出物によって、ピンに挿通された部材がピンから抜け落ちるのを防止することができる。 According to such a configuration, in the first state in which the first opening and the second opening face each other, the pin is inserted through the first opening and the second opening, and then the pin is relatively moved to the second state. Can be disconnected. At this time, with the relative movement from the first state to the second state, the end portion of the cut pin is deformed and enters the expansion portion that expands the first opening. As a result, a protrusion can be intentionally formed at the end of the cut pin. This protrusion can prevent the member inserted through the pin from falling out of the pin.
（２）前記第１開口は、前記第１操作部に形成された切欠きにより構成されていてもよい。この場合、切断後の前記ピンの端部は、前記切欠きを介して取出可能であってもよい。 (2) The first opening may be formed by a notch formed in the first operation portion. In this case, the end of the pin after cutting may be removable through the notch.
　このような構成によれば、切断後のピンの端部に突出物が形成されたとしても、第１開口を構成する切欠きを介して、ピンの端部を容易に取り出すことができる。したがって、ピンを切断した後の操作性が向上する。 According to such a configuration, even if a protrusion is formed at the end of the pin after cutting, the end of the pin can be easily taken out through the notch forming the first opening. Therefore, the operability after cutting the pin is improved.
（３）前記第１開口は、前記第２開口よりも大きくてもよい。この場合、切断後の前記ピンの端部は、前記第１開口の軸線方向に対して平行方向に取出可能であってもよい。 (3) The first opening may be larger than the second opening. In this case, the end of the pin after cutting may be able to be taken out in a direction parallel to the axial direction of the first opening.
　このような構成によれば、切断後のピンの端部に突出物が形成されたとしても、第１開口が第２開口よりも大きいため、ピンの端部を第１開口の軸線方向に対して平行方向に容易に取り出すことができる。したがって、ピンを切断した後の操作性が向上する。 According to such a configuration, even if a protrusion is formed at the end of the pin after cutting, since the first opening is larger than the second opening, the end of the pin is set with respect to the axial direction of the first opening. Can be easily taken out in the parallel direction. Therefore, the operability after cutting the pin is improved.
（４）前記第２操作部には、前記第２開口が前記第１状態から前記第２状態に相対移動するときに前記第１開口内を前記拡張部側に向かって移動する突起が形成されていてもよい。 (4) The second operation portion is formed with a protrusion that moves toward the expansion portion side in the first opening when the second opening moves relative to the second state from the first state. You may be.
　このような構成によれば、第２開口が第１状態から第２状態に相対移動するときに、第１開口内を拡張部側に向かって移動する突起によって、ピンの端部を拡張部側に押圧することができる。これにより、ピンの端部をより強い力で変形させることができるため、切断されたピンの端部に良好に突出物を形成することができる。 According to such a configuration, when the second opening moves relative to the second state from the first state, the end of the pin is moved toward the expansion portion side by the protrusion moving in the first opening toward the expansion portion side. Can be pressed to. As a result, the end portion of the pin can be deformed with a stronger force, so that a protrusion can be satisfactorily formed at the end portion of the cut pin.
（５）前記第１操作部及び前記第２操作部は、互いに対向する対向面をそれぞれ有していてもよい。この場合、前記第１操作部の前記対向面、及び、前記第２操作部の前記対向面には、前記第１操作部及び前記第２操作部の相対移動を前記第１状態と前記第２状態とでそれぞれ規制するためのストッパ機構が設けられていてもよい。 (5) The first operation unit and the second operation unit may each have facing surfaces facing each other. In this case, the relative movement of the first operation unit and the second operation unit is performed on the facing surface of the first operation unit and the facing surface of the second operation unit in the first state and the second state. A stopper mechanism may be provided to regulate each state.
　このような構成によれば、第１操作部及び第２操作部の相対移動を第１状態と第２状態とでそれぞれ規制するためのストッパ機構を、第１操作部及び第２操作部の各対向面に内蔵させることができる。 According to such a configuration, each of the first operation unit and the second operation unit has a stopper mechanism for regulating the relative movement of the first operation unit and the second operation unit in the first state and the second state, respectively. It can be built in the facing surface.
　本発明によれば、切断されたピンの端部に意図的に突出物を形成することができるため、この突出物によって、ピンに挿通された部材がピンから抜け落ちるのを防止することができる。 According to the present invention, since a protrusion can be intentionally formed at the end of the cut pin, it is possible to prevent the member inserted through the pin from falling out of the pin by this protrusion.
工具の平面図である。It is a top view of a tool. 工具の側面図である。It is a side view of a tool. 工具の底面図である。It is a bottom view of a tool. 図１Ａにおける工具のＡ－Ａ断面図である。FIG. 1A is a cross-sectional view taken along the line AA of the tool in FIG. 1A. 第１把持部及び第２把持部を互いに近接させたときの工具の平面図である。It is a top view of the tool when the 1st grip part and the 2nd grip part are brought close to each other. 図２Ａにおける工具のＢ－Ｂ断面図である。FIG. 2B is a sectional view taken along line BB of the tool in FIG. 2A. 第１状態における工具の断面図であり、ピンが挿通された状態を示している。It is sectional drawing of the tool in the 1st state, and shows the state in which a pin is inserted. 第２状態における工具の断面図であり、挿通されたピンが切断された状態を示している。It is sectional drawing of the tool in the 2nd state, and shows the state in which the inserted pin is cut. 工具の第１変形例を示した底面図であり、第１把持部及び第２把持部などを省略して示している。It is the bottom view which showed the 1st modification of a tool, and the 1st grip part, the 2nd grip part and the like are omitted. 工具の第２変形例を示した底面図であり、第１把持部及び第２把持部などを省略して示している。It is the bottom view which showed the 2nd modification of a tool, and the 1st grip part and the 2nd grip part are omitted. 工具の第３変形例を示した斜視図であり、第１操作部の一部の構成のみを示している。It is a perspective view which showed the 3rd modification of a tool, and shows only a part structure of the 1st operation part. 工具の第３変形例を示した斜視図であり、第２操作部の一部の構成のみを示している。It is a perspective view which showed the 3rd modification of a tool, and shows only a part structure of 2nd operation part.
１．ピン切断用工具の全体構成
　本実施形態に係るピン切断用工具１００（以下、単に「工具１００」という。）は、テンションバンドワイヤリング法による固定に用いられるピンを切断するための工具である。ピンの直径は、例えば１～３ｍｍ程度であるが、これに限られるものではない。また、工具１００は、他の用途に用いられるピンを切断することも可能である。 1. 1. Overall Configuration of Pin Cutting Tool The pin cutting tool 100 (hereinafter, simply referred to as “tool 100”) according to the present embodiment is a tool for cutting a pin used for fixing by the tension band wiring method. The diameter of the pin is, for example, about 1 to 3 mm, but is not limited to this. The tool 100 can also cut pins used for other purposes.
　図１Ａは、工具１００の平面図である。図１Ｂは、工具１００の側面図である。図１Ｃは、工具１００の底面図である。図１Ｄは、図１Ａにおける工具１００のＡ－Ａ断面図である。工具１００は、互いに相対移動可能な第１操作部１及び第２操作部２を備えている。本実施形態では、回転軸３を中心に、第１操作部１及び第２操作部２が相対的に回転可能となっている。ただし、このような構成に限らず、第１操作部１及び第２操作部２は、回転ではなくスライドなどの他の態様で相対移動可能な構成であってもよい。 FIG. 1A is a plan view of the tool 100. FIG. 1B is a side view of the tool 100. FIG. 1C is a bottom view of the tool 100. FIG. 1D is a sectional view taken along the line AA of the tool 100 in FIG. 1A. The tool 100 includes a first operation unit 1 and a second operation unit 2 that can move relative to each other. In the present embodiment, the first operation unit 1 and the second operation unit 2 are relatively rotatable around the rotation shaft 3. However, the configuration is not limited to such a configuration, and the first operation unit 1 and the second operation unit 2 may be configured to be relatively movable in other modes such as sliding instead of rotation.
　第１操作部１には、ピンが挿通される第１開口１１が形成されている。第１開口１１は、第１操作部１に形成された切欠き１０により構成されている。すなわち、第１開口１１は、第１操作部１の周縁部から凹状に形成された切欠き１０の一部により構成されている。本実施形態では、回転軸３を中心として径方向に延びるように切欠き１０が形成されており、この切欠き１０の底部が第１開口１１を構成している。 The first operation unit 1 is formed with a first opening 11 through which a pin is inserted. The first opening 11 is composed of a notch 10 formed in the first operation unit 1. That is, the first opening 11 is composed of a part of the notch 10 formed in a concave shape from the peripheral edge portion of the first operating portion 1. In the present embodiment, the notch 10 is formed so as to extend in the radial direction about the rotation shaft 3, and the bottom portion of the notch 10 constitutes the first opening 11.
　第２操作部２には、ピンが挿通される第２開口２１が形成されている。第２開口２１は、例えば円形であり、その内径はピンの外径より若干大きい。図１Ａ～図１Ｄの状態（第１状態）では、第１開口１１及び第２開口２１が互いに対向しており、これらの第１開口１１及び第２開口２１にピンを挿通可能である。すなわち、図１Ａ～図１Ｄの状態では、第１開口１１の中心軸線Ｌ１と、第２開口２１の中心軸線Ｌ２とが同軸上に位置し、これらの中心軸線Ｌ１，Ｌ２に沿ってピンを挿通することができる。 The second operation unit 2 is formed with a second opening 21 through which a pin is inserted. The second opening 21 is, for example, circular, and its inner diameter is slightly larger than the outer diameter of the pin. In the state of FIGS. 1A to 1D (first state), the first opening 11 and the second opening 21 face each other, and a pin can be inserted through the first opening 11 and the second opening 21. That is, in the states of FIGS. 1A to 1D, the central axis L1 of the first opening 11 and the central axis L2 of the second opening 21 are located coaxially, and pins are inserted along these central axes L1 and L2. can do.
　第１操作部１には、ユーザが把持するための第１把持部１２が設けられている。また、第２操作部２にも、ユーザが把持するための第２把持部２２が設けられている。ユーザは、片手で第１把持部１２及び第２把持部２２の両方を把持し、第１把持部１２及び第２把持部２２を互いに近接させるように握りしめる。これにより、回転軸３を中心に第１操作部１及び第２操作部２を相対的に回転させることができる。 The first operation unit 1 is provided with a first grip unit 12 for the user to grip. Further, the second operation unit 2 is also provided with a second grip unit 22 for the user to grip. The user grips both the first grip portion 12 and the second grip portion 22 with one hand, and grips the first grip portion 12 and the second grip portion 22 so as to be close to each other. As a result, the first operation unit 1 and the second operation unit 2 can be relatively rotated around the rotation shaft 3.
　第１把持部１２と第２把持部２２は、弾性体の一例である板バネ４を介して連結されている。板バネ４は、第１把持部１２及び第２把持部２２を互いに近接させる方向に力が加えられたときに、その力に抗して、第１把持部１２及び第２把持部２２を図１Ａ～図１Ｄの状態に戻す方向に弾性力を作用させる。ただし、板バネ４は、第１把持部１２及び第２把持部２２を連結する構成に限らず、第１操作部１及び第２操作部２の他の部分を連結する構成であってもよい。また、板バネ４に限らず、例えばゴムなどの他の弾性体が設けられた構成であってもよい。 The first grip portion 12 and the second grip portion 22 are connected via a leaf spring 4, which is an example of an elastic body. When a force is applied to the leaf spring 4 in a direction in which the first grip portion 12 and the second grip portion 22 are brought close to each other, the leaf spring 4 shows the first grip portion 12 and the second grip portion 22 against the force. An elastic force is applied in the direction of returning to the state of 1A to 1D. However, the leaf spring 4 is not limited to the configuration in which the first grip portion 12 and the second grip portion 22 are connected, and may be configured to connect other portions of the first operation portion 1 and the second operation portion 2. .. Further, the structure is not limited to the leaf spring 4, and other elastic bodies such as rubber may be provided.
　第１把持部１２及び第２把持部２２には、それぞれストッパ５が設けられている。第１把持部１２及び第２把持部２２を互いに近接させたときには、各ストッパ５が互いに当接することにより、第１操作部１及び第２操作部２の相対的な回転が一定量以内に制限される。ただし、ストッパ５は、第１把持部１２及び第２把持部２２に設けられた構成に限らず、第１操作部１及び第２操作部２の他の部分に設けられていてもよい。また、ストッパ５は、第１操作部１又は第２操作部２のいずれか一方に設けられていてもよいし、省略されてもよい。 A stopper 5 is provided on each of the first grip portion 12 and the second grip portion 22. When the first grip portion 12 and the second grip portion 22 are brought close to each other, the stoppers 5 come into contact with each other, so that the relative rotation of the first operation unit 1 and the second operation unit 2 is restricted within a certain amount. Will be done. However, the stopper 5 is not limited to the configuration provided in the first grip portion 12 and the second grip portion 22, and may be provided in other portions of the first operation unit 1 and the second operation unit 2. Further, the stopper 5 may be provided on either the first operation unit 1 or the second operation unit 2, or may be omitted.
２．ピン切断用工具の動作
　図２Ａは、第１把持部１２及び第２把持部２２を互いに近接させたときの工具１００の平面図である。図２Ｂは、図２Ａにおける工具１００のＢ－Ｂ断面図である。図２Ａ及び図２Ｂの状態（第２状態）では、第１開口１１及び第２開口２１が互いに対向していない。すなわち、図２Ａ及び図２Ｂの状態では、第１開口１１の中心軸線Ｌ１と、第２開口２１の中心軸線Ｌ２とが同軸上に位置していない。 2. 2. Operation of the Pin Cutting Tool FIG. 2A is a plan view of the tool 100 when the first grip portion 12 and the second grip portion 22 are brought close to each other. FIG. 2B is a sectional view taken along line BB of the tool 100 in FIG. 2A. In the state of FIGS. 2A and 2B (second state), the first opening 11 and the second opening 21 do not face each other. That is, in the states of FIGS. 2A and 2B, the central axis L1 of the first opening 11 and the central axis L2 of the second opening 21 are not located coaxially.
　図１Ｄ及び図２Ｂに示すように、第１開口１１における第２開口２１側の周縁部には、第１開口１１を拡張する拡張部１１１が形成されている。拡張部１１１は、第２開口２１が図１Ｄの状態（第１状態）から図２Ｂの状態（第２状態）に相対移動する方向Ｄに沿って延びることにより、当該方向Ｄに第１開口１１を拡張している。これにより、第１開口１１は、拡張部１１１において、他の部分よりも大きい内径を有している。本実施形態では、第１開口１１の中心軸線Ｌ１に沿った拡張部１１１の深さが、第１開口１１の中心軸線Ｌ１に沿った長さの１／３～１／２となっているが、これに限られるものではない。 As shown in FIGS. 1D and 2B, an expansion portion 111 that extends the first opening 11 is formed on the peripheral edge portion of the first opening 11 on the side of the second opening 21. The expansion portion 111 extends in the direction D in which the second opening 21 moves relative to the state shown in FIG. 1D (first state) to the state shown in FIG. 2B (second state), so that the first opening 11 extends in the direction D. Is being extended. As a result, the first opening 11 has an inner diameter larger than that of the other portions in the expansion portion 111. In the present embodiment, the depth of the expansion portion 111 along the central axis L1 of the first opening 11 is 1/3 to 1/2 of the length along the central axis L1 of the first opening 11. , Not limited to this.
　第１開口１１における第２開口２１側の周縁部には、上記方向Ｄとは逆方向に延びる段差部１１２が形成されている。第１開口１１の中心軸線Ｌ１に沿った段差部１１２の深さは、拡張部１１１の深さと同程度である。第２操作部２における第１操作部１側の面には、第１操作部１に形成された段差部１１２に挿入される突起２３が形成されている。突起２３の高さは、拡張部１１１の深さと同程度である。 A step portion 112 extending in the direction opposite to the direction D is formed on the peripheral edge portion of the first opening 11 on the side of the second opening 21. The depth of the step portion 112 along the central axis L1 of the first opening 11 is about the same as the depth of the expansion portion 111. On the surface of the second operation unit 2 on the side of the first operation unit 1, a protrusion 23 to be inserted into the step portion 112 formed in the first operation unit 1 is formed. The height of the protrusion 23 is about the same as the depth of the expansion portion 111.
　突起２３は、第２開口２１が図１Ｄの状態（第１状態）から図２Ｂの状態（第２状態）に相対移動するときに、段差部１１２内を方向Ｄに沿って移動する。そして、図２Ｂに示すように、突起２３は第１開口１１内を拡張部１１１側に向かって移動する。すなわち、図２Ｂの状態では、第１開口１１におけるピンが挿通される領域に突起２３が進入する。 The protrusion 23 moves in the step portion 112 along the direction D when the second opening 21 moves relative to the state shown in FIG. 1D (first state) to the state shown in FIG. 2B (second state). Then, as shown in FIG. 2B, the protrusion 23 moves in the first opening 11 toward the expansion portion 111 side. That is, in the state of FIG. 2B, the protrusion 23 enters the region where the pin is inserted in the first opening 11.
３．ピンの切断
　図３Ａは、第１状態における工具１００の断面図であり、ピン２００が挿通された状態を示している。図３Ｂは、第２状態における工具１００の断面図であり、挿通されたピン２００が切断された状態を示している。ピン２００は、例えば金属製であり、切断前は一直線状に延びている。 3. 3. Cutting the Pin FIG. 3A is a cross-sectional view of the tool 100 in the first state, showing a state in which the pin 200 is inserted. FIG. 3B is a cross-sectional view of the tool 100 in the second state, showing a state in which the inserted pin 200 is cut. The pin 200 is made of metal, for example, and extends in a straight line before cutting.
　ピン２００には、テンションバンドワイヤリング法に用いられるリングなどの部材３００が挿通されている。部材３００は、かしめられることによりピン２００に固定されてもよいし、ピン２００に取り付けられた摩擦部材（図示せず）により部材３００の移動が制限されてもよい。あるいは、部材３００がピン２００に対してスライド可能であってもよい。 A member 300 such as a ring used in the tension band wiring method is inserted through the pin 200. The member 300 may be fixed to the pin 200 by caulking, or the movement of the member 300 may be restricted by a friction member (not shown) attached to the pin 200. Alternatively, the member 300 may be slidable with respect to the pin 200.
　図３Ａの状態では、第１開口１１の中心軸線Ｌ１と、第２開口２１の中心軸線Ｌ２とが同軸上に位置しており、これらの中心軸線Ｌ１，Ｌ２に沿ってピン２００が挿通される。具体的には、ピン２００の先端が、図３Ａにおける下方から上方に向かって、第１開口１１から第２開口２１へと挿通される。このとき、突起２３は、挿通されるピン２００に干渉しない位置に退避している。 In the state of FIG. 3A, the central axis L1 of the first opening 11 and the central axis L2 of the second opening 21 are located coaxially, and the pin 200 is inserted along these central axes L1 and L2. .. Specifically, the tip of the pin 200 is inserted from the first opening 11 to the second opening 21 from the lower side to the upper side in FIG. 3A. At this time, the protrusion 23 is retracted to a position where it does not interfere with the pin 200 to be inserted.
　その後、第１把持部１２及び第２把持部２２を互いに近接させると、図３Ｂに示すように、第１開口１１及び第２開口２１が互いに対向しない状態となる。これにより、第１開口１１及び第２開口２１に挿通されているピン２００に対して剪断力が作用し、第１開口１１と第２開口２１との境界においてピン２００が切断される。このように、図３Ａの状態（第１状態）で第１開口１１及び第２開口２１にピン２００を挿通させてから、図３Ｂの状態（第２状態）に第１開口１１及び第２開口２１を相対移動させることにより、ピン２００を切断することができる。 After that, when the first grip portion 12 and the second grip portion 22 are brought close to each other, the first opening 11 and the second opening 21 do not face each other as shown in FIG. 3B. As a result, a shearing force acts on the pins 200 inserted through the first opening 11 and the second opening 21, and the pins 200 are cut at the boundary between the first opening 11 and the second opening 21. In this way, after the pin 200 is inserted through the first opening 11 and the second opening 21 in the state of FIG. 3A (first state), the first opening 11 and the second opening are placed in the state of FIG. 3B (second state). The pin 200 can be cut by moving the 21 relative to each other.
　図３Ｂに示すように、切断されたピン２００は、第１開口１１側の第１部分２０１と、第２開口２１側の第２部分２０２に分離される。ピン２００に挿通されている部材３００は、ピン２００の第１部分２０１に位置している。ピン２００の第１部分２０１の端部は、第２開口２１が第１開口１１に対して相対移動する方向Ｄに向かって変形し、第１開口１１を拡張する拡張部１１１内に入り込む。これにより、ピン２００の第１部分２０１の端部には、方向Ｄに向かって突出する突出物２０３が形成される。 As shown in FIG. 3B, the cut pin 200 is separated into a first portion 201 on the first opening 11 side and a second portion 202 on the second opening 21 side. The member 300 inserted through the pin 200 is located in the first portion 201 of the pin 200. The end of the first portion 201 of the pin 200 is deformed in the direction D in which the second opening 21 moves relative to the first opening 11 and enters the expansion portion 111 that expands the first opening 11. As a result, a protrusion 203 projecting in the direction D is formed at the end of the first portion 201 of the pin 200.
　また、第２開口２１が第１開口１１に対して方向Ｄに相対移動するとき、突起２３が段差部１１２内を方向Ｄに沿って移動し、第１開口１１におけるピン２００が挿通されている領域に突起２３が進入する。これにより、図３Ｂに示すように、切断されたピン２００の第１部分２０１の端部に突起２３が接触し、当該端部を拡張部１１１側に押圧する。 Further, when the second opening 21 moves relative to the first opening 11 in the direction D, the protrusion 23 moves in the step portion 112 along the direction D, and the pin 200 in the first opening 11 is inserted. The protrusion 23 enters the area. As a result, as shown in FIG. 3B, the protrusion 23 comes into contact with the end of the first portion 201 of the cut pin 200 and presses the end toward the extension 111.
　このようにしてピン２００の第１部分２０１の端部を変形させた場合、そのままピン２００の第１部分２０１を第１開口１１の中心軸線Ｌ１に沿って引き抜こうとしても、突出物２０３が拡張部１１１に引っ掛かる。本実施形態では、第１開口１１が切欠き１０により構成されているため、第１開口１１の中心軸線Ｌ１に対して直交する面内でピン２００の第１部分２０１を移動させることにより、切欠き１０を介してピン２００の第１部分２０１の端部を取り出すことができる。 When the end portion of the first portion 201 of the pin 200 is deformed in this way, the protrusion 203 expands even if the first portion 201 of the pin 200 is pulled out along the central axis L1 of the first opening 11 as it is. It gets caught in the part 111. In the present embodiment, since the first opening 11 is composed of the notch 10, the first portion 201 of the pin 200 is moved in a plane orthogonal to the central axis L1 of the first opening 11 to cut the first opening 11. The end of the first portion 201 of the pin 200 can be removed through the notch 10.
４．作用効果
（１）本実施形態では、第１開口１１及び第２開口２１が互いに対向した第１状態（図３Ａの状態）において、第１開口１１及び第２開口２１にピン２００を挿通させ、その後に第２状態（図３Ｂの状態）に相対移動させることにより、ピン２００を切断することができる。このとき、第１状態から第２状態への相対移動に伴って、切断されたピン２００の端部が変形して、当該第１開口１１を拡張する拡張部１１１内に入り込む。その結果、切断されたピン２００の端部に意図的に突出物２０３を形成することができる。この突出物２０３によって、ピン２００に挿通された部材３００がピン２００から抜け落ちるのを防止することができる。 4. Action effect (1) In the present embodiment, in the first state (the state of FIG. 3A) in which the first opening 11 and the second opening 21 face each other, the pin 200 is inserted through the first opening 11 and the second opening 21. After that, the pin 200 can be cut by relatively moving to the second state (state of FIG. 3B). At this time, as the relative movement from the first state to the second state, the end portion of the cut pin 200 is deformed and enters the expansion portion 111 that expands the first opening 11. As a result, the protrusion 203 can be intentionally formed at the end of the cut pin 200. The protrusion 203 can prevent the member 300 inserted through the pin 200 from falling out of the pin 200.
（２）特に、本実施形態では、第２開口２１が第１状態（図３Ａの状態）から第２状態（図３Ｂの状態）に相対移動するときに、第１開口１１内を拡張部１１１側に向かって移動する突起２３によって、ピン２００の端部を拡張部１１１側に押圧することができる。これにより、ピン２００の端部をより強い力で変形させることができるため、切断されたピン２００の端部に良好に突出物２０３を形成することができる。 (2) In particular, in the present embodiment, when the second opening 21 moves relative to the first state (state of FIG. 3A) to the second state (state of FIG. 3B), the expansion portion 111 fills the inside of the first opening 11. The end of the pin 200 can be pressed toward the expansion portion 111 by the protrusion 23 that moves toward the side. As a result, the end portion of the pin 200 can be deformed with a stronger force, so that the protrusion 203 can be satisfactorily formed at the end portion of the cut pin 200.
（３）また、本実施形態では、切断後のピン２００の端部に突出物２０３が形成されたとしても、第１開口１１を構成する切欠き１０を介して、ピン２００の端部を容易に取り出すことができる。したがって、ピン２００を切断した後の操作性が向上する。 (3) Further, in the present embodiment, even if the protrusion 203 is formed at the end of the pin 200 after cutting, the end of the pin 200 can be easily formed through the notch 10 constituting the first opening 11. Can be taken out. Therefore, the operability after cutting the pin 200 is improved.
５．第１変形例
　図４Ａは、工具１００の第１変形例を示した底面図であり、第１把持部１２及び第２把持部２２などを省略して示している。上記実施形態では、切欠き１０が回転軸３を中心として径方向に延びるように形成されていたが、この例では、径方向に対して交差する方向に切欠き１０が延びている。切欠き１０の底部は、第１開口１１を構成している。 5. First Deformation Example FIG. 4A is a bottom view showing a first deformation example of the tool 100, and the first grip portion 12, the second grip portion 22, and the like are omitted. In the above embodiment, the notch 10 is formed so as to extend in the radial direction about the rotation shaft 3, but in this example, the notch 10 extends in a direction intersecting the radial direction. The bottom of the notch 10 constitutes the first opening 11.
　この図４Ａに示すような構成であっても、第１開口１１を構成する切欠き１０を介して、ピン２００の端部を容易に取り出すことができる。このように、切欠き１０は、第１開口１１を開放して、第１開口１１からピン２００の端部を取り出すことができるような構成であれば、切欠き１０が延びる方向及び形状は限定されない。 Even with the configuration shown in FIG. 4A, the end portion of the pin 200 can be easily taken out through the notch 10 constituting the first opening 11. As described above, if the notch 10 has a configuration in which the first opening 11 is opened and the end portion of the pin 200 can be taken out from the first opening 11, the direction and shape in which the notch 10 extends are limited. Not done.
６．第２変形例
　図４Ｂは、工具１００の第２変形例を示した底面図であり、第１把持部１２及び第２把持部２２などを省略して示している。この例では、第１開口１１が切欠き１０により構成されているのではなく、第１開口１１が長孔により形成されている。したがって、第１開口１１が第２開口２１よりも大きく、切断されたピン２００の端部を第１開口１１内で移動させることができる。 6. Second Deformation Example FIG. 4B is a bottom view showing a second modification of the tool 100, in which the first grip portion 12, the second grip portion 22, and the like are omitted. In this example, the first opening 11 is not formed by the notch 10, but the first opening 11 is formed by the elongated hole. Therefore, the first opening 11 is larger than the second opening 21, and the end portion of the cut pin 200 can be moved within the first opening 11.
　これにより、切断後のピン２００の端部を第１開口１１内でずらした後、第１開口１１の軸線方向に対して平行方向に取り出すことができる。すなわち、切断後のピン２００の端部に突出物２０３が形成されたとしても、第１開口１１が第２開口２１よりも大きいため、ピン２００の端部を第１開口１１の軸線方向に対して平行方向に容易に取り出すことができる。したがって、ピン２００を切断した後の操作性が向上する。 As a result, after the end of the pin 200 after cutting is shifted in the first opening 11, it can be taken out in a direction parallel to the axial direction of the first opening 11. That is, even if the protrusion 203 is formed at the end of the pin 200 after cutting, since the first opening 11 is larger than the second opening 21, the end of the pin 200 is oriented with respect to the axial direction of the first opening 11. Can be easily taken out in the parallel direction. Therefore, the operability after cutting the pin 200 is improved.
　ただし、第１開口１１を構成する長孔が延びる方向は任意である。また、第１開口１１は、長孔に限らず、例えば第２開口２１より大径の円形状であってもよいし、円形状以外の形状であってもよい。 However, the direction in which the elongated holes constituting the first opening 11 extend is arbitrary. Further, the first opening 11 is not limited to the elongated hole, and may have a circular shape having a diameter larger than that of the second opening 21, or may have a shape other than the circular shape.
７．第３変形例
　図５Ａ及び図５Ｂは、工具１００の第３変形例を示した斜視図である。図５Ａでは、第１操作部１の一部の構成のみを示しており、図５Ｂでは、第２操作部２の一部の構成のみを示している。これらの第１操作部１及び第２操作部２が互いに組み合わせられることにより、第３変形例の工具１００が構成される。 7. Third Deformation Example FIGS. 5A and 5B are perspective views showing a third modification of the tool 100. FIG. 5A shows only a part of the configuration of the first operation unit 1, and FIG. 5B shows only a part of the configuration of the second operation unit 2. By combining these first operation unit 1 and second operation unit 2 with each other, the tool 100 of the third modification is configured.
　図５Ａにおける第１操作部１の上面は、第２操作部２に対向する対向面１３を構成している。また、図５Ｂにおける第２操作部２の上面は、第１操作部１に対向する対向面２４を構成してる。すなわち、第１操作部１及び第２操作部２は、互いに対向面１３，２４を対向させた状態で組み合わせられる。このとき、第１操作部１の対向面１３から突出するように形成された回転軸３が、第２操作部２の対向面２４に形成された凹部３１内に嵌め込まれることにより、回転軸３を中心に、第１操作部１及び第２操作部２が相対的に回転可能となる。 The upper surface of the first operation unit 1 in FIG. 5A constitutes a facing surface 13 facing the second operation unit 2. Further, the upper surface of the second operation unit 2 in FIG. 5B constitutes a facing surface 24 facing the first operation unit 1. That is, the first operation unit 1 and the second operation unit 2 are combined in a state where the facing surfaces 13 and 24 face each other. At this time, the rotating shaft 3 formed so as to protrude from the facing surface 13 of the first operating unit 1 is fitted into the recess 31 formed in the facing surface 24 of the second operating unit 2, whereby the rotating shaft 3 is fitted. The first operation unit 1 and the second operation unit 2 are relatively rotatable around the above.
　第１操作部１には、ピンが挿通される第１開口１１が２つ形成されている。各第１開口１１（第１開口１１０及び第１開口１２０）は、上記実施形態と同様に、それぞれ回転軸３に対して径方向に延びる切欠きにより構成されている。第１開口１１０及び第１開口１２０は、回転軸３を中心とする周方向に、互いに間隔を隔てて並べて形成されている。 The first operation unit 1 is formed with two first openings 11 through which pins are inserted. Each of the first openings 11 (first opening 110 and first opening 120) is formed by notches extending in the radial direction with respect to the rotation shaft 3, respectively, as in the above embodiment. The first opening 110 and the first opening 120 are formed side by side with a distance from each other in the circumferential direction centered on the rotation axis 3.
　第２操作部２には、ピンが挿通される第２開口２１が、第１開口１１と同数である２つ形成されている。各第２開口２１（第２開口２１０及び第２開口２２０）は、上記実施形態と同様に、それぞれ円形である。第２開口２１０及び第２開口２２０は、回転軸３を中心とする周方向に、互いに間隔を隔てて並べて形成されている。第２開口２１０及び第２開口２２０の間隔は、第１開口１１０及び第１開口１２０の間隔と一致している。 The second operation unit 2 is formed with two second openings 21 through which pins are inserted, which is the same number as the first opening 11. Each of the second openings 21 (second opening 210 and second opening 220) is circular, as in the above embodiment. The second opening 210 and the second opening 220 are formed side by side with a distance from each other in the circumferential direction centered on the rotation axis 3. The distance between the second opening 210 and the second opening 220 coincides with the distance between the first opening 110 and the first opening 120.
　第２開口２１０及び第２開口２２０は、互いに異なる内径を有している。具体的には、第２開口２１０よりも第２開口２２０の方が大きい内径を有している。第２開口２１０は、例えば１．６５ｍｍの内径で形成されており、外径１．６ｍｍのピンを挿通させるのに適している。一方、第２開口２２０は、例えば２．０５ｍｍの内径で形成されており、外径２．０ｍｍのピンを挿通させるのに適している。 The second opening 210 and the second opening 220 have different inner diameters from each other. Specifically, the second opening 220 has a larger inner diameter than the second opening 210. The second opening 210 is formed, for example, with an inner diameter of 1.65 mm, and is suitable for inserting a pin having an outer diameter of 1.6 mm. On the other hand, the second opening 220 is formed, for example, with an inner diameter of 2.05 mm, and is suitable for inserting a pin having an outer diameter of 2.0 mm.
　第１開口１１０は第２開口２１０に対向し、第２開口２１０に挿通された比較的小径のピンが、第２開口２１０に連通する第１開口１１０にも挿通される。一方、第１開口１２０は第２開口２２０に対向し、第２開口２２０に挿通された比較的大径のピンが、第２開口２２０に連通する第１開口１２０にも挿通される。第１開口部１１０及び第１開口部１２０には、上記実施形態と同様に拡張部１１１が形成されている。各拡張部１１１により、第１開口部１１０及び第１開口部１２０が、それぞれ回転軸３を中心とする周方向に拡張されている。 The first opening 110 faces the second opening 210, and a pin having a relatively small diameter inserted through the second opening 210 is also inserted through the first opening 110 communicating with the second opening 210. On the other hand, the first opening 120 faces the second opening 220, and a relatively large-diameter pin inserted through the second opening 220 is also inserted through the first opening 120 communicating with the second opening 220. Expansion portions 111 are formed in the first opening 110 and the first opening 120 as in the above embodiment. Each of the expansion portions 111 expands the first opening 110 and the first opening 120 in the circumferential direction about the rotation axis 3.
　第１開口部１１０に形成された拡張部１１１は、第１開口部１２０に形成された拡張部１１１よりも、周方向への拡張量（周方向の長さ）が短い。すなわち、挿通されるピンの外径が比較的小さい第１開口１１０には、拡張量が比較的小さい拡張部１１１が形成されており、挿通されるピンの外径が比較的大きい第１開口１２０には、拡張量が比較的大きい拡張部１１１が形成されている。このように、拡張部１１１の拡張量は、第２開口２１（第２開口２１０及び第２開口２２０）に挿通されるピンの外径に対応していることが好ましい。 The expansion portion 111 formed in the first opening 110 has a shorter expansion amount (length in the circumferential direction) in the circumferential direction than the expansion portion 111 formed in the first opening 120. That is, the expansion portion 111 having a relatively small expansion amount is formed in the first opening 110 having a relatively small outer diameter of the pin to be inserted, and the first opening 120 having a relatively large outer diameter of the pin to be inserted. The expansion portion 111 having a relatively large expansion amount is formed in. As described above, it is preferable that the expansion amount of the expansion portion 111 corresponds to the outer diameter of the pin inserted into the second opening 21 (second opening 210 and second opening 220).
　このように、第１開口１１及び第２開口２１の数は、１つずつに限らず、それぞれ２つ以上形成されていてもよい。この場合、複数の第１開口１１のそれぞれに拡張部１１１が形成される。各拡張部１１１は、回転軸３を中心とする周方向の一方向に向かって、それぞれ同じ方向に各第１開口１１を拡張するように形成される。 As described above, the number of the first opening 11 and the second opening 21 is not limited to one, and two or more of each may be formed. In this case, the expansion portion 111 is formed in each of the plurality of first openings 11. Each expansion portion 111 is formed so as to expand each first opening 11 in the same direction toward one direction in the circumferential direction centered on the rotation axis 3.
　第１操作部１の対向面１３には、凸部１３０が形成されている。また、第２操作部２の対向面２４には、凹部２３０が形成されている。第１操作部１及び第２操作部２が、互いに対向面１３，２４を対向させた状態で組み合わせられたときには、凸部１３０が凹部２３０内に入り込む。凹部２３０は、回転軸３を中心とする周方向に延びており、回転軸３を中心に第１操作部１及び第２操作部２が相対的に回転したときには、凹部２３０内を凸部１３０が周方向に移動する。 A convex portion 130 is formed on the facing surface 13 of the first operation unit 1. Further, a recess 230 is formed on the facing surface 24 of the second operation unit 2. When the first operation unit 1 and the second operation unit 2 are combined with the facing surfaces 13 and 24 facing each other, the convex portion 130 enters the concave portion 230. The concave portion 230 extends in the circumferential direction centered on the rotating shaft 3, and when the first operating portion 1 and the second operating portion 2 rotate relative to the rotating shaft 3, the concave portion 130 is inside the concave portion 230. Moves in the circumferential direction.
　凸部１３０が凹部２３０の周方向の一端部に当接する状態では、第１開口１１及び第２開口２１が互いに対向する第１状態となる。一方、凸部１３０が凹部２３０の周方向の他端部に当接する状態では、第１開口１１及び第２開口２１が互いに対向しない第２状態となる。すなわち、凸部１３０及び凹部２３０は、第１操作部１及び第２操作部２の相対移動を第１状態と第２状態とでそれぞれ規制するためのストッパ機構３０を構成している。 In a state where the convex portion 130 is in contact with one end of the concave portion 230 in the circumferential direction, the first opening 11 and the second opening 21 are in the first state facing each other. On the other hand, in the state where the convex portion 130 is in contact with the other end of the concave portion 230 in the circumferential direction, the first opening 11 and the second opening 21 are in a second state in which they do not face each other. That is, the convex portion 130 and the concave portion 230 form a stopper mechanism 30 for restricting the relative movement of the first operation unit 1 and the second operation unit 2 in the first state and the second state, respectively.
　ただし、凸部１３０が第１操作部１に形成され、凹部２３０が第２操作部２に形成された構成に限らず、凸部１３０が第２操作部２に形成され、凹部２３０が第１操作部１に形成された構成であってもよい。また、ストッパ機構３０は、凸部及び凹部により構成されるものに限らず、他の任意の構成を採用することができる。 However, the configuration is not limited to the configuration in which the convex portion 130 is formed in the first operation portion 1 and the concave portion 230 is formed in the second operation portion 2, but the convex portion 130 is formed in the second operation portion 2 and the concave portion 230 is the first. The configuration may be formed in the operation unit 1. Further, the stopper mechanism 30 is not limited to the one composed of the convex portion and the concave portion, and any other configuration can be adopted.
　上記の例では、回転軸３を中心とする周方向において、２つの第１開口１１（第１開口１１０及び第１開口１２０）の間に凸部１３０が設けられ、２つの第２開口２１（第２開口２１０及び第２開口２２０）の間に凹部２３０が設けられている。ただし、このような構成に限らず、第１操作部１及び第２操作部２の各対向面１３，２４において、上記の例とは異なる位置にストッパ機構３０が設けられていてもよい。 In the above example, the convex portion 130 is provided between the two first openings 11 (first opening 110 and first opening 120) in the circumferential direction centered on the rotation shaft 3, and the two second openings 21 ( A recess 230 is provided between the second opening 210 and the second opening 220). However, the present invention is not limited to such a configuration, and the stopper mechanism 30 may be provided at a position different from the above example on the facing surfaces 13 and 24 of the first operation unit 1 and the second operation unit 2.
　この変形例では、上記実施形態とは異なり、第２操作部２に突起２３が形成されていない。このように、突起２３は省略することも可能である。 In this modified example, unlike the above embodiment, the protrusion 23 is not formed on the second operation unit 2. In this way, the protrusion 23 can be omitted.
１　　　第１操作部
２　　　第２操作部
３　　　回転軸
４　　　板バネ
５　　　ストッパ
１０　　切欠き
１１　　第１開口
１２　　第１把持部
１３　　対向面
２１　　第２開口
２２　　第２把持部
２３　　突起
２４　　対向面
３０　　ストッパ機構
１００　ピン切断用工具
１１１　拡張部
１１２　段差部
２００　ピン
２０３　突出物
３００　部材 1 1st operation unit 2 2nd operation unit 3 Rotating shaft 4 Leaf spring 5 Stopper 10 Notch 11 1st opening 12 1st grip portion 13 Facing surface 21 2nd opening 22 2nd grip portion 23 Protrusion 24 Facing surface 30 Stopper mechanism 100 Pin cutting tool 111 Expansion part 112 Step part 200 Pin 203 Projection 300 member

Claims (5)

  1. 　ピンを切断するための工具であって、
    　第１開口が形成された第１操作部と、
    　第２開口が形成され、前記第１操作部に対して相対移動可能な第２操作部とを備え、
    　前記第１開口及び前記第２開口は、互いに対向した第１状態で前記ピンを挿通可能であり、前記第１状態で前記ピンを挿通させてから第２状態に相対移動させることにより、前記ピンを切断することができ、
    　前記第１開口における前記第２開口側の周縁部には、前記第２開口が前記第１状態から前記第２状態に相対移動する方向に前記第１開口を拡張する拡張部が形成されている、ピン切断用工具。     A tool for cutting pins
    The first operation unit with the first opening and
    A second opening is formed, and a second operation unit that can move relative to the first operation unit is provided.
    The first opening and the second opening can be inserted with the pin in the first state facing each other, and by inserting the pin in the first state and then moving the pin relative to the second state, the pin can be inserted. Can be disconnected,
    An expansion portion that expands the first opening in a direction in which the second opening moves relative to the first state to the second state is formed on the peripheral edge portion of the first opening on the side of the second opening. , Pin cutting tool.
  2. 　前記第１開口は、前記第１操作部に形成された切欠きにより構成されており、
    　切断後の前記ピンの端部は、前記切欠きを介して取出可能である、請求項１に記載のピン切断用工具。     The first opening is formed by a notch formed in the first operation portion.
    The pin cutting tool according to claim 1, wherein the end portion of the pin after cutting can be taken out through the notch.
  3. 　前記第１開口は、前記第２開口よりも大きく、
    　切断後の前記ピンの端部は、前記第１開口の軸線方向に対して平行方向に取出可能である、請求項１に記載のピン切断用工具。     The first opening is larger than the second opening,
    The pin cutting tool according to claim 1, wherein the end of the pin after cutting can be taken out in a direction parallel to the axial direction of the first opening.
  4. 　前記第２操作部には、前記第２開口が前記第１状態から前記第２状態に相対移動するときに前記第１開口内を前記拡張部側に向かって移動する突起が形成されている、請求項１～３のいずれか一項に記載のピン切断用工具。 The second operation portion is formed with a protrusion that moves toward the expansion portion side in the first opening when the second opening moves relative to the second state from the first state. The pin cutting tool according to any one of claims 1 to 3.
  5. 　前記第１操作部及び前記第２操作部は、互いに対向する対向面をそれぞれ有しており、
    　前記第１操作部の前記対向面、及び、前記第２操作部の前記対向面には、前記第１操作部及び前記第２操作部の相対移動を前記第１状態と前記第２状態とでそれぞれ規制するためのストッパ機構が設けられている、請求項１～４のいずれか一項に記載のピン切断用工具。     The first operation unit and the second operation unit each have facing surfaces facing each other.
    The relative movement of the first operation unit and the second operation unit is performed on the facing surface of the first operation unit and the facing surface of the second operation unit in the first state and the second state. The pin cutting tool according to any one of claims 1 to 4, which is provided with a stopper mechanism for regulating each.
PCT/JP2020/023947 2019-08-26 2020-06-18 Pin cutting tool WO2021039049A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07100145A (en) * 1993-08-09 1995-04-18 Kijuro Hayano Wire fastening device
JP2012231839A (en) * 2011-04-28 2012-11-29 Takiron Co Ltd Cutter for bone joining material
US20130213202A1 (en) * 2010-10-14 2013-08-22 Vermont Instrument Makers, Llc Cutter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07100145A (en) * 1993-08-09 1995-04-18 Kijuro Hayano Wire fastening device
US20130213202A1 (en) * 2010-10-14 2013-08-22 Vermont Instrument Makers, Llc Cutter
JP2012231839A (en) * 2011-04-28 2012-11-29 Takiron Co Ltd Cutter for bone joining material

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