JP2006141963A - Auxiliary apparatus for wound outside fixing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an auxiliary apparatus for a wound outside fixing apparatus capable of sticking small diameter pins, screws, wires, or the like to be stuck into a fractured or broken part, in a plurality of directions when used mounted to the wound outside fixing apparatus or a wound outside fixing device heretofore in use and needing neither special members nor a high degree of forming. <P>SOLUTION: A holding member 100 detachably holds a pin P1 and a pin P2, and clamping screws 121, 122 detachably clamp the pins at the holding member 100. A rod 110 is stuck to the holding member 100 and provided with a fall preventing part 111 at the tip. A shaft 210 is connectable to the wound outside fixing apparatus and provided with a fall preventing part 211 at the tip part. A connecting device 200 connects the shaft 210 to the holding member rod 110. Arrow marks A1, A2, S1 show the turning or moving state of an adjusting screw, the connecting device 200 and the holding member 100 around a shaft part of the connecting shaft 210. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is an auxiliary means for the function of an external fixator, which is a means for fixing a fractured or broken part of a limb body, and has a predetermined dimension on a holding member that detachably holds at least one small-diameter pin or screw to be inserted into the bone. And a connecting device for connecting the shaft manufactured so as to be connected to the external fixator and the holding member rod so as to be pivotable, adjustable in angle, or slidable. The present invention relates to an auxiliary device for an external fixator.

Conventionally, when healing fractures of the limbs, various bone fixation devices and various external fixators have been used as orthopedic instruments to fix fractures or broken sites. For example, a general external fixator has a rod-shaped member disposed along a fractured part, a pair of supports disposed at both ends thereof, and one end fixed at a right angle to the support. The bone is fixed by having a plurality of small-diameter pins, screws, wires, or the like, and inserting the other end into the bone at the fracture or broken site.
Also, for example, when this external fixator is applied to a wrist joint fracture, the fracture site is fixed with a thin pin, screw, wire, etc., and after reducing the joint surface, the wrist joint An external fixator was worn across the top.

  However, in the above-described conventional example, a small-diameter pin, a screw, a wire, or the like can be inserted only from one direction into the bone, that is, a one-way insertion type. For this reason, for example, in a distal radius fracture that occurs when an elderly person falls and touches the hand, the distal radius may become a crushed fracture in which the distal end is crushed into several pieces. In this case, the one-way insertion type has a problem that a pin cannot be inserted into a small piece of bone opposite to the side where the attachment member is attached. In addition, for example, even in an external fixator for a wrist joint fracture, the small-diameter pin inserted into the fracture or damaged site is limited to one direction, so the pin is inserted from the side of the wrist joint, for example. In some cases, a separate external fixator was required when there was a fracture or broken site in the dorsal or palmar direction of the wrist joint. Also, when an ulna fracture occurred at the same time as the flexion, another external fixator was necessary.

  Therefore, in recent years, the following development projects have increased in order to solve the above-described problems.

  For example, in an external fixation device used for fractures etc., if you want to fix a pin or wire that supports the bone to several bones from the same direction according to the treatment site, close the gap between the pin and the wire. It is a problem to provide an external fixation device that can be attached from substantially the same direction, and the solution means that the half ring used for the external fixation device is located on the inner side of the plate-shaped ring member bent in an arc shape. By concentrically drilling two rows of through holes on the outer side at equal intervals, the through holes in the outer side row of through holes are positioned at the center between adjacent through holes in the inner side of the through hole row. An external fixation device that can support a bone from substantially the same direction is known. (Refer to JP 2002-306501 A)

  In addition, for example, it is a problem to provide an external fixator that can insert a pin from a plurality of directions with respect to a wrist joint fracture, and can fix the fracture of the ulna separately from the fracture of the radius. As for the external fixator, a pair of clamps are arranged at the front and rear ends of the rod-shaped member, a large-diameter pin is sandwiched between the clamps, and a thin-diameter pin is sandwiched between the clamps. Two independent clamping portions are provided at both ends of the arc-shaped substrate having an angle of more than 90 °, each holding about three, and a front ball joint protruding from the end of the rod-shaped member is clamped at the center of the arc-shaped substrate. There is known an external fixator that is provided with a possible engaging portion and inserts a small-diameter pin from the flexing side and the dorsal side into the ground end of the calcaneus to firmly fix the surface. (See JP 2003-305049 A)

  It is an object to provide a connector capable of relative positioning of a pin of a fixing bar or an external fixing device, and as a solution, a connector for connecting a fixing bar or pin of an external fixing device to a relative position A plurality of jaws having grooves defining a passage adapted to receive a bar or pin, wherein an elastic device is disposed between the jaws, and the groove forming the passage is in relation to the elastic device; An outer opening is positioned and arranged so that a bar or pin can be pushed and fixed into the passage from the opening of the jaw against the applied pressure, and the elastic device connects the shaft to the coupling Couplers are known that are adapted to push the adjacent surfaces of the jaws together to hold the coupler in a bar or pin before being secured to. (Refer to JP-A-8-71084)

  However, a half ring or a plate-shaped ring member bent in an arc shape used in the development project of the external fixation device disclosed in Japanese Patent Application Laid-Open No. 2002-306501 has two rows that are concentrically arranged toward the inner side and the outer side. Holes are formed at equal intervals, and bones can be supported from substantially the same direction by positioning the through holes of the outer side through hole row at the center position between adjacent through holes in the inner side through hole row. In the external fixation device, it has been pointed out that the member has a special shape or has a relatively large number of members. In addition, a pair of clamps used in the development project of the external fixator disclosed in Japanese Patent Application Laid-Open No. 2003-305049, two independent holding portions at both ends of the arc-shaped substrate having a central angle exceeding 90 °, It has been pointed out that the member has a special shape or a relatively large number of members due to the ball joint or the engaging portion that can hold the ball joint. In addition, at least a plurality of couplers to be used in the external fixing device development project disclosed in JP-A-8-71084 must be used with respect to the target external fixing device. It is pointed out that it is disadvantageous in terms of problems and costs.

  The present invention has been made to solve the above-described problems, and can be used by attaching it to a conventionally used external fixator or external fixator, and can be used to puncture a fractured or damaged site. Providing auxiliary devices for external fixators with excellent cost performance by inserting small diameter pins, screws, wires, etc. in multiple directions and eliminating the need for special members or advanced molding Objective.

  As a first means to solve the problem, it is an auxiliary means for the function of the external fixator that is a means for fixing a fractured or broken part of the limb body, and at least one small-diameter pin or screw to be inserted into the bone is removable A rod of a predetermined size is fixed to a holding member held on the shaft, and the shaft and the holding member rod manufactured so as to be connected to the external fixator can be pivoted or (and) adjustable in angle or (and) slid. It is an object of the present invention to provide an auxiliary device for an external fixator, characterized in that it includes a connecting device for connecting in a possible manner.

The external fixator can be used regardless of the model or manufacturer as long as it is of a type that holds the pin or screw (for external fixation having a screw at the tip) or a wire detachably. The thin pin or screw or wire is formed of a biocompatible metal, hard resin, inorganic material, etc., and the metal is preferably titanium or a titanium alloy, and the inorganic material is preferably ceramic. is there. In addition, the dimensions of the thin pin, screw or wire may be selected from a diameter of approximately 1.0 mm to 2.0 mm and a length of 50 mm to 150 mm.
As for the holding member, as to means for detachably holding a small-diameter pin, screw or wire to be inserted into a fractured or broken part, the holding member is clamped by using a plurality of plate-like bodies or a metal fitting such as a hinge. The material may be selected from a molded body provided with a means or a hole, and the material may be metal or plastic, but the material certified as a medical device or sterilization and disinfection to prevent nosocomial infection For example, it is preferable to use a material that does not change in quality, for example, aluminum or an aluminum alloy, titanium or a titanium alloy, stainless steel or other metal, carbon fiber, or the like, and a PEEK material is suitable.
As for the rod and the shaft, metal or plastic may be used as long as it is a long cylindrical body or a rod-shaped body that functions as a rotatable shaft, but it is a sterilized or disinfecting material that is certified as a medical device or prevents hospital infection. It is preferable to use a material that does not deteriorate with respect to the treatment. For example, aluminum or an aluminum alloy, titanium or a titanium alloy, a metal such as stainless steel, carbon fiber, or the like is preferable. In addition, as for the rod and the shaft, as a means for preventing the metal fitting, member, and device from falling off, a substantially spherical portion formed at one end of the rod or the shaft larger than the diameter of the elongated cylindrical body or the rod-shaped body. May be provided.

  As the means for connecting the shaft and the holding member rod so as to be pivotable, any means may be used as long as it is provided with a tightening means and an opening means to enable rotation, rotation or turning. . As the means for connecting the shaft and the holding member rod so as to be adjustable in angle, any means may be used as long as it is provided with a tightening means and an opening means to enable adjustment of the change in angle. Absent. As a means for slidably connecting the shaft and the holding member rod, any means may be used as long as it is provided with a tightening means and an opening means to enable a sliding state or a sliding operation. .

  As a second means for solving the problem, the connecting device may be configured such that an arbitrary part is slidably connected in the long axis direction of the connecting shaft and the holding member rod is arbitrarily connected in the long axis direction. A third member for holding a second member for slidably connecting portions to each other and holding the second member so as to be pivotable or (and) adjustable in angle or (and) slidable. An object of the present invention is to provide an auxiliary device for an external fixator described in the first means for solving the problem.

As for the third member that allows the first member and the second member to turn freely, a member, a metal fitting, or an articulated coupling means provided with a rotation adjustable means and a means that can be fixed / released at an arbitrary position Or a ball joint or an articulated joint.
With respect to the third member that allows the angle of the first member and the second member to be adjusted, members, metal fittings, and articulated coupling means comprising means capable of adjusting the angle and means capable of being fixed and opened at an arbitrary angle. Or a ball joint or an articulated joint.
With regard to the third member that allows the first member and the second member to slide, members, metal fittings, and joints provided with means capable of sliding or sliding adjustment and means capable of being fixed / released at an arbitrary position. What is necessary is just to select and use from an expression coupling | bonding means.

  As a third means for solving the problem, the first member has a hole portion that vertically penetrates the other end of the first columnar body, which is a cylindrical member having a predetermined dimension, and is opposed to one end of the curved surface. A rod-shaped screw portion is provided on the first plane of the first cylindrical body so as to be perpendicular to the first plane, and the second member is one end of the curved surface of the second cylindrical body having a cylindrical body of a predetermined size as a base member. A hole that penetrates the other end of the second cylinder perpendicularly, and a female thread that fits into the rod-shaped thread so as to penetrate from the first plane of the second cylinder to the second cylinder hole. Provided perpendicular to the one plane, and provided with an internal thread portion perpendicular to the second plane so as to penetrate from the second plane of the second cylinder to the second cylindrical hole, the second cylinder An adjustment screw portion of a rod-shaped screw body formed so as to be fitted to the second flat female screw portion; A first cylindrical body formed to be swingable or (and) slidable with a member, and a second cylinder formed to be swingable and / or slidable with the second member. A first semi-circular cutout is provided so that one end of the first cylindrical body is in contact with the connection shaft and the contact portion is slidable with the curved surface of the connection shaft; One end of the two cylinders is in contact with the holding member rod, and the contact portion is configured by the coupling device provided with a substantially semicircular cutout so as to be slidable with the curved surface of the holding member rod. It is an object of the present invention to provide an auxiliary device for an external fixator described in the first means for solving the problem or the second means for solving the problem.

Regarding the first member hole and the second member hole, the shape of the opening may be circular or elliptical.
With respect to the adjustment screw portion, the head is engaged with the tip of a tool such as a screwdriver or a hex wrench so that the holding member rod can be swung in the second member hole by turning the tool. The moving motion can be controlled so that it can be locked at an arbitrary position, and the motion of the holding member rod sliding within the second member hole can be controlled so that it can be locked firmly at an arbitrary position.
The substantially semicircular cutout is provided at one end of the first cylindrical body and one end of the second cylindrical body, and the curved surface of the holding member rod and the connection shaft is provided with respect to the substantially semicircular shape. As long as the sliding state and the fitting state are achieved, the size of the substantially semicircle does not matter. By adjusting the adjustment screw part, it is possible to support each of the substantially semicircular cutouts, the holding member rod, and the connection shaft with good clamping pressure.
As for the material of the first cylindrical body, the second cylindrical body, the first cylindrical body, and the second cylindrical body, metal or plastic may be used. It is preferable to use a material that does not deteriorate with respect to the sterilization and sterilization treatment to be prevented. For example, aluminum or aluminum alloy, titanium or titanium alloy, metal such as stainless steel, carbon fiber, or the like is preferable.

  By attaching to a commonly used external fixator by the auxiliary device for external fixator of the present invention, a bone fixing pin, screw, wire, or the like is attached to the bone being treated from multiple directions. Can be inserted, and more appropriate treatment can be performed.

  In addition to the effects of the invention described above, the auxiliary device for an external fixator according to the present invention includes several bone fixing pins, screws, wires, or the like for supporting bones from the same direction depending on the fractured or broken state or the treatment site. It can be used even when it is intended to be fixed toward the bone, and more appropriate treatment can be performed on the bone being treated.

  In addition to the effects of the invention described above, the auxiliary device for an external fixator according to the present invention is an external device that is currently used such as a wrist joint fracture. Even if it is necessary to insert a plurality of bone fixing pins, screws, wires, or the like that are substantially orthogonal to the fixing device on a plane, it can be fixed to a flat fracture site with a single unit. Therefore, it is possible to prevent the movement of the fixed bone and to firmly fix the surface, and even with one external fixator, it is possible to fix the ulna fracture separately from the flexion fracture Become.

  In addition to the effects of the invention described above, the auxiliary device for an external fixator according to the present invention does not allow a bone fixing pin, screw, wire, or the like to be inserted into all the separated bones only by inserting from one direction. Even if a bone fracture or breakage occurs, by using at least one or more of the present invention, it is possible to arrange pins, screws, wires, etc. in a radial manner, and all external bones can be fixed even with a single external fixator. It becomes possible to achieve good healing.

  In addition to the effects of the above-described invention, the auxiliary device for an external fixator of the present invention is, for example, a bridge type, a limb joint that is used as a conventional external fixator across a joint of a limb. Since it was common to separate the type used without straddling with the non-bridge type, it was necessary to put both models together and there was an economic burden, but using the present invention Thus, the non-bridge type can be used in a bridge type with an increased capacity, so that an economic effect can be expected.

  The auxiliary device for an external fixator according to the present invention is used in addition to the effects of the above-described invention when the present invention is used in a plurality of directions or for inserting pins, screws, wires or the like at a plurality of points on a plane. The patient can be easily separated from the external fixator as needed when the treatment progresses and the insertion of pins or screws or wires or the like becomes partially unnecessary Can be used as an external fixator system.

  The auxiliary device for an external fixator according to the present invention can improve the functions of the external fixator and the external fixator that have been used in the past by combining the effects of the above-described invention. By functioning as above, it is possible to provide a means for functioning as an unprecedented new external fixation system.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
FIG. 1 is a front view showing an embodiment of an auxiliary device for an external fixator of the present invention, and FIG. 2 is a top view showing an embodiment of an auxiliary device for an external fixator of the present invention. FIG. 3 is a side view showing an embodiment of an auxiliary device for an external fixator of the present invention, and FIG. 4 is a development view of a connecting device used in the auxiliary device for an external fixator of the present invention.

  The embodiment of FIG. 1 explains claim 1 of the present invention and a first means for solving the problem. For example, P1 and P2 are small-diameter pins to be inserted into bones at fractures or broken sites. 100 is a holding member for detachably holding the pin P1 and the pin P2, 121 and 122 are clamping screws for detachably pinching the pin P1 and the pin P2 by the holding member 100, respectively. In addition, a holding member rod 110 made of metal and having a predetermined size is fixed to the holding member 100, and a drop-off preventing portion 111 is provided at the tip of the holding member rod 110. Reference numeral 210 denotes a shaft manufactured so as to be connected to a commonly used external fixator (not shown), and a drop prevention portion 211 is provided at the tip of the connection shaft 210. Reference numeral 200 denotes a connecting device that connects the connecting shaft 210 and the holding member rod 110 so as to be able to turn and slide.

  In addition, A1 adjusts the connection shaft 210 by turning around the shaft portion by opening one adjustment screw (not shown in FIG. 1) provided in the coupling device 200 with a tool. When the connection shaft 210 and the holding member rod 110 are clamped to the connecting device 200 by tightening the screws, the arrows indicate a state in which the connecting device 200 and the holding member 100 pivot about the shaft portion of the connecting shaft 210. ing. A2 is that the holding member rod 110 pivots around the shaft portion by opening the adjusting screw with a tool, and the holding member rod 110 is clamped to the coupling device 200 by tightening the adjusting screw. The arrows indicate a state in which the coupling device 200 and the holding member 100 pivot about the shaft portion of the holding member rod 110. S <b> 1 indicates an arrow in a state where the connecting device 200 can be moved or fixed to any position as long as the connecting device 200 is on the long axis of the holding member rod 110 by adjusting the adjusting screw. S <b> 2 indicates an arrow in a state where the coupling device 200 can be moved or fixed to an arbitrary position as long as the coupling device 200 is on the long axis of the connection shaft 210 by adjusting the adjustment screw. S3 indicates an arrow in a state where the connection shaft 210 is connected to the external fixator.

  The embodiment of FIG. 2 describes claim 1 and the first means for solving the problem of the present invention or claim 2 and the second means for solving the problem. The member 100 is formed in a slender shape so that the female screw part 131, the female screw part 132, and the holding member rod 110 provided so as to be fitted to the male screw parts of the clamping screw 121 and the clamping screw 122 can be fixed. The plate body 130 is composed of an elongated plate body 120 formed so that the clamping screw 121 and the clamping screw 122 can be detachably fitted and can embed their respective heads, and the pins P1 and P2 are elongated. It is mounted between the small plate body 130 and the elongated plate body 120 and is clamped by tightening the clamping screw 121 and the clamping screw 122 with a predetermined tool. The contact surface between the pin P1 and the pin P2 is slippery For this purpose, a concavo-convex shape may be provided, and a washer 141 is provided for buffering between the elongated small plate member 120 and the elongated small plate member 130 that is penetrated by the clamping screw 121 and is penetrated by the clamping screw 122. A washer 142 may be provided for buffering between the elongated plate 120 and the elongated plate 130. In addition, the connecting device 200 is a length of the first member 220 and the holding member rod 110 formed so as to provide a hole 221 as one of means for slidably connecting any part in the longitudinal direction of the connecting shaft 210. A third member 240 that holds the second member 230 shaped so as to be provided with a hole 231 as one of means for slidably connecting any part in the axial direction so as to be pivotable or slidable. , 250 are detachably combined.

  Further, by adjusting the adjustment screw 260 which is a screw means formed so as to be embedded in the long axis direction inside the second member 230 by using a tool, for example, in the case of the arrow A1, the adjustment screw 260 is used by a tool. The connection shaft 210 pivots about the shaft portion by opening the connection shaft 210, and the connection shaft 210 and the holding member rod 110 are clamped to the coupling device 200 at an arbitrary position by tightening the adjustment screw 260. The coupling device 200 and the holding member 100 are shown in a state of pivoting around the shaft portion of the connection shaft 210. For example, in the case of the arrow A2, the holding screw is released by opening the adjusting screw 260 with a tool. 110 is pivoted about the shaft, and the adjustment screw 260 is tightened, whereby the holding member rod 110 is moved to the connecting device 200 at an arbitrary position. The coupling device 200 and the holding member 100 are pivoted about the shaft portion of the holding member rod 110 by being sandwiched between the two, and, for example, in the case of the arrow S1, by adjusting the adjustment screw 260 As long as the connecting device 200 is on the long axis of the holding member rod 110, the connecting device 200 can be moved to an arbitrary position or fixed.

  The embodiment of FIGS. 3 and 4 is described in any one of claims 1 and 3 from the first means for solving the problem to the claims 3 and the third means for solving the problem. For example, the first member 220 includes a hole portion 221 that vertically penetrates the other end of the first cylindrical body 222 that has a cylindrical body having a predetermined size as a base member, and that faces the other end of the curved surface. A rod-like screw portion 224 is provided on the first plane 223 of one cylinder 222 so as to be perpendicular to the first plane 223, and the second member 230 is a second cylinder 232 having a cylinder with a predetermined size as a base member. Is provided with a hole portion 231 that vertically penetrates the other end of the curved surface of the second cylindrical body 232 and is fitted to the rod-like screw portion 224 so as to penetrate from the first flat surface 233 of the second cylindrical body 232 to the hole portion 231. The female screw part 234 which is an elongated hole formed with the first plane 2 3, a female screw portion 236 that is an elongated hole formed with a female screw shape provided so as to penetrate from the second plane 235 of the second cylindrical body 232 to the hole portion 231 is formed on the second plane 235. On the long axis of the holding member rod 110 that passes through the hole portion 231 and slides, by providing the adjustment screw 260 of a rod-like screw body that is provided perpendicularly to the female screw portion 236 and is formed. The state where the head 261 of the adjustment screw 260 is rotated by using a tool and the tip 262 is suppressed and the second member 230 can be moved or fixed to an arbitrary position on the long axis of the holding member rod 110. It becomes possible, and movement of arrow A1, arrow A2, arrow S1, and arrow S2 becomes possible.

Further, the third member 240 is slidably in contact with the curved surface of the connection shaft 210 at one end of the first tubular body 241 formed so as to be pivotable or slidable with the first member 220. A substantially semicircular cutout 242 is provided. By tightening the head 261 of the adjustment screw 260 with a tool, the connection shaft 210 is firmly pressed and connected by the substantially semicircular cutout 242 at an arbitrary position. The operating function of the connecting device 200 is locked in conjunction.
Further, the third member 250 is slidably in contact with the curved surface of the holding member rod 110 at one end of the second cylindrical body 251 formed so as to be pivotable or slidable with the second member 230. Is provided with a substantially semicircular cutout 252, and the holding member rod 110 is firmly pressed by the substantially semicircular cutout 252 at an arbitrary position by tightening the head 261 of the adjustment screw 260 with a tool. The operating function of the connected device 200 is locked in conjunction.

It is a front view which shows the example of embodiment of this invention. It is a top view which shows the example of embodiment of this invention. It is a side view which shows the embodiment of this invention. It is an expanded view of the connection apparatus used by this invention.

Explanation of symbols

P1 Narrow pin P2 Narrow pin A1 Swivel arrow A2 Swivel arrow S1 Rod long axis up arrow S2 Connection shaft long axis up arrow S3 External fixator connection arrow 100 Holding member 110 Holding member rod 111 Falling prevention part 120 Elongated small plate body 121 Clamping screw 122 Clamping screw 130 Elongated small plate body 131 Female screw part 132 Female screw part 141 Washer 142 Washer 200 Connecting device 210 Connection shaft 211 Fall-off prevention part 220 First member 221 Hole part 222 First cylinder Body 223 First plane 224 Rod-shaped screw portion 230 Second member 231 Hole 232 Second cylindrical body 233 First plane 234 Female screw portion 235 Second plane 236 Female screw portion 240 Third member 241 First cylindrical body 242 About half Circular notch 250 Third member 251 Second cylindrical body 252 Substantially semicircular notch 260 Adjustment screw 261 Head 262 tip

Claims (3)

This is an auxiliary means for the function of the external fixator, which is a means for fixing fractures or broken parts of the limb, and a rod of a predetermined size is fixed to a holding member that detachably holds at least one small-diameter pin or screw to be inserted into the bone And a connecting device for connecting the shaft manufactured to be able to be connected to the external fixator and the holding member rod so as to be pivotable or (and) adjustable in angle or (and) slidable. An auxiliary device for an external fixator. The coupling device includes a first member that slidably couples any part in the major axis direction of the connection shaft, and a second member that slidably couples any part in the major axis direction of the holding member rod; The auxiliary device for an external fixator according to claim 1, further comprising a third member that holds the device so as to be pivotable or (and) adjustable in angle or (and) slidable. The first member has a cylindrical body of a predetermined size as a base member, a hole portion that vertically penetrates the other end of the curved surface of the first cylindrical body, and a rod-shaped screw portion on the first plane of the first cylindrical body Is provided so as to be perpendicular to the first plane, and the second member is a hole that vertically penetrates the other end facing the one end of the curved surface of the second cylindrical body having a cylindrical body of a predetermined size as a base member. A female screw part that fits into the rod-like screw part so as to penetrate from the first plane of the second cylindrical body to the hole of the second cylindrical body is provided perpendicular to the first plane, An internal thread portion is provided perpendicularly to the second plane so as to penetrate from the second plane of the cylindrical body to the second cylindrical body hole, and is fitted to the second cylindrical body second plane internal thread portion. An adjustment screw portion of a molded rod-shaped screw body is provided, and the third member is pivotable or slidable with the first member. The first cylindrical body is formed by a first cylindrical body that is formed so as to be slidable and / or slidable with the second member. One end of the second cylindrical body is provided with a substantially semicircular notch so that the contact portion can slide on the curved surface of the connection shaft, and one end of the second cylindrical body is connected to the holding member rod. The contact portion is configured by the connecting device provided with a substantially semicircular cutout so as to be slidable with the curved surface of the holding member rod. Auxiliary device for external fixator described in 1.

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