JP4956513B2 - Optical fiber holder moving structure and fusion splicer - Google Patents

Description

  The present invention relates to an optical fiber holder, a moving structure thereof, and a fusion splicer.

  2. Description of the Related Art Conventionally, in a fusion splicer for fusion splicing of optical fibers, holder stands are disposed on both sides of the pair of discharge electrodes on a line perpendicular to the pair of discharge electrodes opposed to each other. Then, the fusion splicer places the optical fiber holders holding the optical fibers to be connected on each holder base so that the optical fibers face each other, and moves the holder base in the longitudinal direction of the optical fiber. After the ends of the fibers are butted together, they are fusion spliced. At this time, a device using a linear guide as means for moving the holder base is known (for example, see Patent Document 1).

Japanese Patent Laid-Open No. 9-212253 (page 3, FIG. 5)

  By the way, as shown in FIG. 15, the linear guide L has the slide table T installed on the rail R so as to be movable in the longitudinal direction. At this time, when the holder base PH is moved by the linear guide L, the holder base PH is fixed on the slide table T and a return spring S is disposed between the holder base PH and the wall W. And when abutting the tip of an optical fiber, optical fiber holder H which grasped optical fiber F is laid on each holder stand PH. Here, the permanent magnet M is embedded in the bottom surface of the optical fiber holder H, and the permanent magnet M is magnetically attracted to the permanent magnet embedded in the upper surface of the holder base PH or a magnetic body Mb such as iron, and is mounted on the holder base PH. It is detachably mounted and fixed to. Then, the rear part of one holder base PH (right side in the figure) is pressed as indicated by an arrow by an actuator that converts the rotation of the motor into a linear motion.

  As a result, in the drawing, the right holder base PH is moved to the left, which is the front, against the spring force of the return spring S, and the tips of the optical fibers F are abutted against each other. After the fusion connection, when the pressing by the actuator is released, the holder base PH returns to a predetermined position by the spring force of the return spring S. Thus, when the fusion splicer uses a linear guide for moving the holder base, there is a problem that the number of components increases and costs increase.

  The present invention has been made in view of the above, and provides an optical fiber holder, a moving structure thereof, and a fusion splicer capable of reducing the number of components and cost of moving means for moving a holder base. Objective.

  In order to solve the above-described problems and achieve the object, an optical fiber holder of the present invention grips an optical fiber and is placed along a longitudinal direction of the optical fiber with respect to a mounting object that is detachably mounted. A movable optical fiber holder, comprising: a guided portion that guides the movement with respect to the placement target; and a magnetic suction body that is attracted to a fixed magnetic suction body fixed to the placement target. It is possible to move in a state where the guided portion is pressed against the placement target by a magnetic attraction force acting between a body and the fixed magnetic attracting body.

  In order to solve the above-described problems and achieve the object, the optical fiber holder of the present invention grips an optical fiber and is placed in a longitudinal direction of the optical fiber with respect to a mounting object that is detachably mounted. An optical fiber holder that is movable along the guide, includes a guided portion that guides movement with respect to the placement target, and a magnetic attractant that is attracted to a fixed magnetic attractant fixed to the placement target. When a force is applied from a predetermined position on the object to be placed, it moves against the magnetic attraction force, and when the force is released, it can be returned to the predetermined position. In relation, the magnetic attractant is disposed.

  In the above invention, the magnetic attractant is arranged at a position shifted from the fixed magnetic attractant so that a magnetic attracting force acts in a direction in which the guided portion is pressed against the placement target. It is provided.

  In the invention described above, one of the fixed magnetic attractant and the magnetic attractant is a permanent magnet, and the other is a permanent magnet or a magnetic material that is magnetically attracted to the permanent magnet.

  In order to solve the above-described problems and achieve the object, the moving structure of the optical fiber holder according to the present invention provides the light to the mounting object on which the optical fiber holder holding the optical fiber is detachably mounted. An optical fiber holder moving structure for moving a fiber holder along the longitudinal direction of the optical fiber, wherein the guided portion is provided in the optical fiber holder and guides the movement of the optical fiber holder with respect to the placement target. A guide part provided on the placement object and guided by the guided part, a magnetic adsorber provided on the optical fiber holder, and attracting the optical fiber holder and the placement object by a magnetic attraction force. A fixed magnetic adsorber that is provided on a placement object and that attracts the optical fiber holder and the placement object with a magnetic attraction force, and the magnetic adsorption body and the fixed magnet By the magnetic attraction force acting between the adsorbent, and wherein the moving the optical fiber holder in a state of being pressed against the guided portion to the guide portion.

  In order to solve the above-described problems and achieve the object, the moving structure of the optical fiber holder according to the present invention provides the light to the mounting object on which the optical fiber holder holding the optical fiber is detachably mounted. An optical fiber holder moving structure for moving a fiber holder along the longitudinal direction of the optical fiber, wherein the guided portion is provided in the optical fiber holder and guides the movement of the optical fiber holder with respect to the placement target. A guide part that is provided on the placement object and guides the guided part; a magnetic adsorber that is provided on the optical fiber holder and that attracts the optical fiber holder and the placement object by a magnetic attraction force; A fixed magnetic adsorber that is provided on a placement object and that attracts the optical fiber holder and the placement object by a magnetic attraction force, and the optical fiber holder comprises: When a force is applied from a predetermined position on the object to be placed, it moves against the magnetic adsorption force between the fixed magnetic adsorber and the magnetic adsorber, and when the force is released, it returns to the predetermined position. The fixed magnetic adsorber and the magnetic adsorber are disposed so as to be possible.

  Further, the moving structure of the optical fiber holder according to the present invention is such that, in the above invention, the magnetic attractant and the fixed magnetic attraction are arranged so that a magnetic attraction force acts in a direction in which the guided portion is pressed against the guide portion. It is arranged at a position shifted from the body.

  Moreover, in the moving structure of the optical fiber holder of the present invention, in the above invention, one of the magnetic adsorber and the fixed magnetic adsorber is a permanent magnet and the other is a permanent magnet that is magnetically adsorbed to the permanent magnet. It is a magnetic material.

  In order to solve the above-described problems and achieve the object, the fusion splicer according to the present invention is a fusion splicer that fusion-connects optical fibers arranged opposite to each other at a tip portion. And a holder base on which the fixed magnetic attracting body attracted to the magnetic attracting body of the optical fiber holder is fixed and on which the optical fiber holder is placed.

  According to the present invention, since the optical fiber holder is guided and moved by pressing the guided portion provided on the optical fiber holder against the object to be placed by the magnetic attraction force, the linear guide or the slide table is provided. There is no need to prepare. In addition, it is not necessary to provide a return spring by disposing the fixed magnetic attracting body and the magnetic attracting body so that the optical fiber holder returns to a predetermined position after moving by the magnetic attracting force. For this reason, the optical fiber holder, the moving structure thereof, and the fusion splicer of the present invention have an effect that the number of components and cost of the moving means for moving the holder base can be reduced.

  Hereinafter, embodiments of the optical fiber holder, the moving structure thereof, and the fusion splicer according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of a fusion splicer showing a state in which an optical fiber holder in which a windshield cover is opened and an optical fiber is held on a holder base is installed. FIG. 2 is a perspective view of the holder base. FIG. 3 is a perspective view of an optical fiber holder that is detachably mounted on a holder base.

  As shown in FIG. 1, the fusion splicer 1 includes a main body 2, a fusion splicing unit 3, and a holding mechanism 5.

  The fusion splicer 1 is a handy type small splicer that can be held and held by an operator. As shown in FIG. 1, the main body 2 and the fusion splicer 3 are formed in a T-shape. The main body 2 is provided with a display unit 2a and an input unit 2b. For example, the display unit 2a can display characters such as a connection loss set value, an estimated loss, and a warning about an axis deviation error. The display unit 2a may be a touch panel type so that various operations can be performed from the screen.

  As shown in FIG. 1, the input unit 2b includes a power key Kp for turning on / off the power, a cursor key Kcu for starting up and connecting the cursor in the display unit 2a, and a cursor for operating the cursor. In addition to various operation keys such as a key Kcd, a reset key Kr, a selection determination key Ke, and an operation key Kop for inputting operation start or position stop, a monitor lamp Lm for displaying a power on / off state is provided. Note that the input unit 2b may select the type of optical fiber by inputting the type of optical fiber.

  As shown in FIG. 1, the fusion splicing part 3 has a set of holder bases 14 (see FIG. 2), a discharge electrode 3c, and a windshield cover 4 covering these. Here, the pair of holder bases 14 and the discharge electrodes 3c are installed on the internal support substrate 3a. The holder table 14 is a table on which optical fiber holders (hereinafter simply referred to as “holders”) 15 are placed, and one holder table 14 is arranged on each of the left and right sides of the discharge electrode 3c. The discharge electrode 3c is arranged to face the optical fiber 16 held by the holder 15 so as to be orthogonal to each other. Hereinafter, the holder base 14 and the holder 15 will be described, and the moving structure of the optical fiber holder will be described together. In addition, the holder base 14 functions as a mounting object described in the claims.

  As shown in FIG. 2, the holder base 14 is provided with a guide wall 14b on one side in the width direction of the base 14a on which the holder 15 is placed, and a side wall 14c on the other side. The holder base 14 is spaced apart from the base 14a in the longitudinal direction, and has a permanent magnet 14d embedded in a position slightly shifted from the center in the width direction toward the guide wall 14b. The permanent magnet 14d is embedded so as to be flush with the upper surface of the base 14a. Here, the distance between the guide wall 14b and the side wall 14c is set to be slightly longer than the width of the substrate 15a of the holder 15. The guide wall 14b functions as a guide portion described in the claims, and the permanent magnet 14d functions as a fixed magnetic attracting body described in the claims.

  The holder 15 is moved by pressing each holder 15 in a forward direction toward the other holder 15 by an actuator (not shown). The actuator is driven to press the holder 15 under the control of the control unit by pressing the operation key Kop when the optical fiber 16 is fusion-bonded. After the fusion is completed, the actuator is interlocked with the opening operation of the windshield cover 4. The holder 15 is driven to release the pressing in the forward direction. As shown in FIG. 3, the holder 15 includes a substrate 15a that moves on the base 14a, and a lid 15b that covers the front upper surface of the substrate 15a. The holder 15 protrudes a predetermined length from the end of the optical fiber 16 and holds it between the substrate 15a and the lid 15b. The holder 15 is detachably mounted on the holder base 14 with the side surface of the substrate 15a contacting the guide wall 14b. Placed.

  As shown in FIG. 3, the substrate 15 a becomes a guided surface Fs that is guided to move with respect to the holder base 14 by one side surface in the guide direction coming into contact with the guide wall 14 b. The guided surface Fs functions as a guided portion described in the claims. In the substrate 15a, a fiber groove 15c in which the optical fiber 16 is disposed is formed in the center in the width direction along the longitudinal direction, and a lid 15b formed of a magnetic material is adsorbed by magnetic force on one upper surface sandwiching the front fiber groove 15c. A permanent magnet 15d is embedded. As shown in FIG. 4, the substrate 15a has two magnetic bodies 15e embedded in the lower surface. In addition, this magnetic body 15e functions as a magnetic adsorption body as described in a claim, and may be iron etc. or a permanent magnet. In the longitudinal direction, the two magnetic bodies 15 e are provided at positions corresponding to the two permanent magnets 14 d provided on the holder base 14 when the holder 15 is placed at a predetermined position on the holder base 14. However, the two magnetic bodies 15e are provided in the center in the width direction of the substrate 15a.

  As described above, the magnetic body 15e is provided in the center of the holder 15 in the width direction, whereas the permanent magnet 14d is provided closer to the guide wall 14b than the center of the holder base 14 in the width direction. Therefore, when the holder 15 is placed on the holder base 14, the magnetic body 15e is shifted from the permanent magnet 14d toward the center in the width direction, so that the holder 15 is affected by the magnetic attractive force between the magnetic body 15e and the permanent magnet 14d. The guided surface Fs is always urged toward the guide wall 14b. As a result, when the force is applied in the forward direction by the actuator, the holder 15 moves on the holder base 14 while being pressed by the guide wall 14b. For this reason, it is preferable that the substrate 15a is processed so as to have a low frictional resistance with respect to the holder base 14, or a material having a low frictional resistance is used.

  Moreover, the magnetic body 15e sets the length along a longitudinal direction with the permanent magnet 14d of the holder base 14 to the length corresponding to the stroke to the advance direction by an actuator. That is, when the holder 15 advances a predetermined stroke, if the pressing force by the actuator is released, the length is set such that the magnetic attraction force that can return the holder 15 to the predetermined position is reached. In addition, when the holder 15 is moved forward by a required stroke by the actuator, the overlap between the magnetic body 15e and the permanent magnet 14d disappears, and the magnetic attraction force in the return direction of the holder 15 is suddenly weakened. The return spring may be disposed between the holder 15 and the holder base 14.

  The lid 15b is formed of a magnetic metal and is attached so as to be openable and closable so as to cover the front side of the substrate 15a by a rotating shaft 15f as shown in FIG. The lid 15b is provided with an elastic member 15g for pressing the optical fiber 16 against the fiber groove 15c on the lower surface. Here, the optical fiber 16 is placed on the holder base 14 after being pretreated so that the coating 16a is removed from the end while being held by the holder 15 and the bare fiber 16b is exposed to a predetermined length at the end. Is done. The optical fiber 16 is a single optical fiber. However, if a dedicated holder is separately prepared, it is possible to hold a multi-fiber optical fiber or a tape fiber and fuse and connect them.

  As shown in FIGS. 1, 2, and 4, the holding mechanism 5 is disposed to face the left and right sides near the discharge electrode 3 c, and has a V-groove block 51 and a pressing member 52. The V groove block 51 positions the optical fiber 16. The pressing member 52 is attached to the inner surface of the windshield cover 4 and presses and holds the optical fiber 16 against the V-groove block 51 when the windshield cover 4 is closed.

  The holder 15, the moving structure of the optical fiber holder and the fusion splicer 1 are configured as described above, and the optical fiber 16 is fused and connected using the moving method of the optical fiber holder described below.

  First, after pressing the power key Kp of the input unit 2b to turn on the power, each holder 15 that has been gripped and preprocessed by holding the optical fiber 16 is set on the holder base 14 as shown in FIG. As a result, the optical fibers 16 held by the holders 15 are opposed to each other with a predetermined interval facing each other. At this time, as shown in FIGS. 5 and 6, the positions of the magnetic body 15e and the permanent magnet 14d along the longitudinal direction of the holder base 14 are the same, but the position along the width direction of the holder base 14 is , It is slightly off. Therefore, the holder 15 is placed on the holder base 14 with the guided surface Fs pressed against the guide wall 14b by the magnetic attractive force of the magnetic body 15e and the permanent magnet 14d as shown in FIG.

  Next, when the windshield cover 4 is closed, in the fusion splicer 1, the pressing member 52 of each holding mechanism 5 is pressed against the V-groove block 51, and each optical fiber 16 is held by each holding mechanism 5. At this time, an image of the optical fiber 16 photographed by each image sensor 8 is displayed on the display unit 2a.

  After that, when the operation key Kop is pressed to input the operation start, the fusion splicer 1 is driven under the control of the control unit, the actuator is driven, the holder 15 is pushed in the forward direction, and the guide wall is moved on the holder base 14. While being guided in a state in which the guided surface Fs is pressed by 14b, the magnetic body 15e and the permanent magnet 14d move forward by a predetermined distance (for example, 1 mm) against the magnetic attraction force in the longitudinal direction of the holder base 14, and move forward. Held in position. As a result, the end of the bare fiber 16b of the optical fiber 16 arranged to face is abutted with accuracy at a point P as shown in FIG. At this time, as shown in FIG. 8, the permanent magnet 14 d and the magnetic body 15 e are shifted not only in the width direction but also in the longitudinal direction of the holder base 14.

  Next, the fusion splicer 1 is supplied with power to the discharge electrode 3c under the control of the control unit, and arc discharge is generated between the pair of discharge electrodes 3c. The end of the bare fiber 16b is fusion spliced to the optical fiber 16 that has been abutted by the discharge heat accompanying this arc discharge.

When the windshield cover 4 is opened after the connection is completed, the fusion splicer 1 is driven by the actuator to release the pressing of the one holder 15 and to the V-groove block 51 of each optical fiber 16 by the pressing member 52. Is released. As a result, when the fusion-bonded optical fiber 16 is removed from each holder 15 as will be described later, one of the pressed holders 15 is guided by the magnetic attractive force between the magnetic body 15e and the permanent magnet 14d. Guided by the wall 14b, it returns to its original position.

  Then, the optical fibers 16 thus fused and connected are opened from the respective holders 15 by opening the respective lids 15b, and the connection portion is subsequently reinforced.

  In this manner, the fusion splicer 1 moves while the holder 15 is guided by pressing the guided surface Fs provided on the holder 15 against the guide wall 14b of the holder base 14 by the magnetic attraction force. Therefore, it is not necessary to provide a linear guide or a slide table. Further, since the permanent magnet 14d and the magnetic body 15e are arranged so that the holder 15 returns to a predetermined position after the movement by the magnetic attractive force, it is not necessary to provide a return spring. For this reason, there exists an effect that a number of parts and cost can be reduced.

  Here, in the holder 15, the side surface of the substrate 15 a is a guided surface Fs that guides the movement with respect to the holder base 14. However, the guided portion of the holder 15 is not limited to the side surface of the substrate 15a as long as the movement with respect to the holder base 14 can be guided. Hereinafter, although the modified example of the holder 15 is demonstrated, the same code | symbol is used for the same component of the holder 15 and the holder stand 14. FIG.

(Modification 1)
For example, like the holder 15A shown in FIG. 9, a guided wall 15h serving as a guided portion may be provided on one side in the width direction below the substrate 15a, and a wall 15i may be provided on the other side. The holder base 14A is provided with a guide step portion 14e serving as a guide portion on one side in the width direction of the base 14a, and a step portion 14f with which the wall 15i is engaged on the other side. At this time, the holder 15A sets the distance from the inner surface of the guide wall 15h to the inner surface of the wall 15i slightly longer than the distance between the guide step 14e and the step 14f of the holder base 14A. Further, the permanent magnet 14d is provided at the center in the width direction of the holder base 14A, and the magnetic body 15e is provided on the guide step 14e side from the center in the width direction of the holder 15A.

  With this configuration, when the holder 15A is placed on the holder base 14A, the magnetic body 15e is displaced from the permanent magnet 14d toward the width direction guide step 14e, so that the magnetic body 15e and the permanent magnet 14d The guided wall 15h of the holder 15A is always urged toward the vertical surface of the guide step portion 14e by the magnetic attraction force. As a result, when a force is applied in the forward direction by the actuator, the holder 15A moves on the holder base 14A while being pressed by the vertical surface of the guide step portion 14e.

(Modification 2)
Further, like the holder 15B shown in FIG. 10, a guided wall 15h serving as a guided portion is provided on one side in the width direction of the lower portion of the substrate 15a, and the side surface of the base 14a of the holder base 14B with which the guided wall 15h is engaged is provided. You may use as a guide part.

  At this time, when the holder 15B is placed on the holder base 14B, the magnetic body 15e and the permanent magnet 14d are arranged such that the position of the magnetic body 15e is shifted toward the guided wall 15h in the width direction with respect to the position of the permanent magnet 14d. Are provided on the holder 15B and the holder base 14B. Thus, when the holder 15B is placed on the holder base 14B, the guided wall 15h of the holder 15B is always engaged with the guided wall 15h by the magnetic attractive force of the magnetic body 15e and the permanent magnet 14d. It is urged to the side. As a result, when a force is applied in the forward direction by the actuator, the holder 15B moves on the holder table 14B while being pressed against the side surface of the holder table 14B.

(Modification 3)
Furthermore, like the holder 15C shown in FIG. 11, a guided protrusion 15j serving as a guided portion in the longitudinal direction may be provided below the substrate 15a. Then, the holder base 14C is provided with a guide groove 14g serving as a guide portion by engaging the guided protrusion 15j on the upper surface of the base 14a. At this time, the guide groove 14g is formed wider than the guided ridge 15j. Further, when the guided ridge 15j is engaged with the guide groove 14g and the holder 15C is placed on the holder base 14C, the position of the magnetic body 15e is guided in the width direction with respect to the position of the permanent magnet 14d. The magnetic body 15e and the permanent magnet 14d are provided on the holder 15C and the holder base 14C so as to be shifted to the side.

  As a result, when the holder 15C is placed on the holder base 14C, the surface of the guided projection 15j of the holder 15C on the magnetic body 15e side of the guided ridge 15j of the holder 15C always has the guide groove 14g. It is biased to the surface on the permanent magnet 14d side. As a result, when a force is applied in the forward direction by the actuator, the holder 15C moves on the holder base 14C while being pressed by the surface of the guide groove 14g on the permanent magnet 14d side.

(Modification 4)
Further, as a guided portion, as shown in a holder 15D shown in FIG. 12, a guided hole 15k consisting of two elongated holes vertically penetrating the substrate 15a and the lid 15b is used, and the long side of the elongated hole is the moving direction of the holder 15D. And may be provided along the longitudinal direction so as to be parallel to each other. The holder base 14D is provided with guide pins 14h as guide portions at positions corresponding to the guided holes 15k on the upper surface of the base 14a. At this time, the guide pin 14h is set to have a diameter slightly smaller than the width of the guided hole 15k so that the guide pin 14h can move slightly in the width direction perpendicular to the long side in the guided hole 15k. Further, when the guide pin 14h is engaged with the guided hole 15k and the holder 15D is placed on the holder base 14D, the position of the magnetic body 15e is closer to the guided hole 15k in the width direction than the position of the permanent magnet 14d. The magnetic body 15e and the permanent magnet 14d are provided on the holder 15D and the holder base 14D so as to be displaced.

  Thus, when the holder 15D is placed on the holder base 14D, the surface opposite to the magnetic body 15e side of the guided hole 15k of the holder 15D is always guided by the magnetic attractive force between the magnetic body 15e and the permanent magnet 14d. 14h is energized. As a result, when a force is applied in the forward direction by the actuator, the holder 15D moves on the holder base 14D while being pressed by the guide pins 14h.

  Further, like the holder 15E shown in FIG. 13, one side surface of the substrate 15a and the lid 15b may be a guided surface 15m as a guided portion. And the guide pin 14h as a guide part which guides the to-be-guided surface 15m is provided in the upper surface of the base 14a of the holder base 14E. Further, when the guide pin 14h is brought into contact with the guided surface 15m and the holder 15E is placed on the holder base 14E, the position of the magnetic body 15e is different from the position of the permanent surface 14m in the width direction with respect to the position of the permanent magnet 14d. The magnetic body 15e and the permanent magnet 14d are provided on the holder 15E and the holder base 14E so as to shift to the opposite side.

  Thereby, when the holder 15E is placed on the holder base 14E, the guided surface 15m of the holder 15E is always urged to the guide pin 14h by the magnetic attractive force between the magnetic body 15e and the permanent magnet 14d. As a result, when a force is applied in the forward direction by the actuator, the holder 15E moves on the holder base 14E while being pressed by the guide pins 14h.

  The fusion splicer 1 of the above-described embodiment has been described with respect to a handy-type small fusion splicer that can be held by an operator and can be connected to the hand. It may be a desktop-type fusion splicer used.

  Moreover, you may use each modification of holder 15A-15E combining suitably.

  Next, other embodiments of the optical fiber holder, the moving structure thereof, and the fusion splicer of the invention will be described. Since the configuration of the fusion splicer excluding the holder and the holder base is the same as that of the above-described embodiment, the description thereof is omitted. Hereinafter, the holder base 14 and the holder 15 will be described, and the moving structure of the optical fiber holder will be described together. In addition, the holder base 14 functions as a mounting object described in the claims. In addition, what attached | subjected the code | symbol same as 1st embodiment has the structure similar to 1st embodiment.

  As shown in FIG. 14, the holder base 14 is provided with guide walls 14r on both side surfaces in the width direction of the base 14a on which the holder 15 is placed. The distance between the inner side surfaces of both guide walls 14 r is set to be approximately the same length as the width of the holder 15. A permanent magnet 14d is embedded in the center of the upper surface of the base 14a in the width direction with an interval in the longitudinal direction. The two guide walls 14r function as guide portions described in the claims, and the permanent magnet 14d functions as a fixed magnetic attracting member described in the claims.

  The holder 15 has a substrate 15a that moves on the base 14a and a lid 15b that covers the front upper surface of the substrate 15a. The holder 15 protrudes a predetermined length from the end of the optical fiber 16 and grips it between the substrate 15a and the lid 15b. The holder 15 is detachably attached to the holder base 14 by bringing both side surfaces of the substrate 15a into contact with the guide wall 14b. Placed. Both side surfaces of the substrate 15a are guided portions guided by the guide wall 14b.

  Two magnetic bodies 15e are embedded in the lower surface of the substrate 15a. The magnetic body 15e functions as a magnetic attracting body described in the claims. The two magnetic bodies 15e are provided at positions corresponding to the two permanent magnets 14d provided on the holder base 14 when the holder 15 is placed at a predetermined position on the holder base 14 in both the longitudinal direction and the width direction. .

  The magnetic body 15e and the permanent magnet 14d set the length along the longitudinal direction to a length corresponding to the stroke in the forward direction by the actuator. That is, when the holder 15 advances a predetermined stroke, if the pressing force by the actuator is released, the length is set such that the magnetic attraction force that can return the holder 15 to the predetermined position is reached.

  As described above, when the holder 15 is pressed in the forward direction by the actuator, the both sides of the holder 15 are guided on the holder base 14 by the guide walls 14r, and the holder base 14 of the magnetic body 15e and the permanent magnet 14d is guided. It moves forward by a predetermined distance against the magnetic attraction force in the longitudinal direction and is held at the advanced position. At this time, since the distance between the inner side surfaces of the both guide walls 14r is set to be substantially the same as the width of the holder 15, the holder 15 is guided to the both guide walls 14r without rattling in the width direction. . And the permanent magnet 14d and the magnetic body 15e are hold | maintained in the position which shifted | deviated to the longitudinal direction of the holder base 14. FIG.

  Then, after the tip of the optical fiber 16 is fused and connected, when the actuator is driven and the pressing of the holder 15 is released, the holder 15 is moved back to the original position by the magnetic attractive force between the magnetic body 15e and the permanent magnet 14d. Move back to.

  Thus, since the permanent magnet 14d and the magnetic body 15e are disposed so that the holder 15 returns to a predetermined position after being moved by the magnetic attractive force, it is not necessary to provide a return spring. For this reason, there exists an effect that a number of parts and cost can be reduced.

  In the present embodiment, the holder 15 and the holder base 14 modified in the same manner as in the first embodiment can also be used.

It is a top view of the fusion splicer which shows the state which opened the windshield cover and installed the optical fiber holder which hold | gripped the optical fiber to the holder stand. It is a perspective view of a holder stand. It is a perspective view of the optical fiber holder detachably mounted on a holder base. It is sectional drawing which cut | disconnected the optical fiber holder shown in FIG. 3 which closed the lid | cover along the longitudinal direction in the center of the width direction. It is a front view explaining a moving structure of an optical fiber holder of the present invention by cutting a part of a holder stand and an optical fiber holder. FIG. 6 is a plan view of FIG. 5. It is a front view explaining the movement structure of the optical fiber holder which shows the state which moved the one optical fiber holder with respect to the holder stand in the fusion splicer shown in FIG. 1, and attached the optical fiber. It is a top view which shows the state which the optical fiber holder moved. It is a perspective view which shows typically the modification 1 of an optical fiber holder. It is a perspective view which shows the modification 2 of an optical fiber holder typically. It is a perspective view which shows the modification 3 of an optical fiber holder typically. It is a perspective view which shows the modification 4 of an optical fiber holder typically. It is a perspective view which shows the modification 5 of an optical fiber holder typically. It is a top view which illustrates typically other embodiment of the movement structure of the optical fiber holder of this invention. It is a schematic block diagram of the conventional moving means which moves a holder stand using a linear guide.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fusion splicer 2 Main body 3 Fusion splicing part 4 Windshield cover 5 Holding mechanism 51 V groove block 52 Pressing member 14 Holder stand 14a Base 14b Guide wall 14c Side wall 14d Permanent magnet 14e Guide step 14g Guide groove 14h Guide pin 15 Holder 15a Substrate 15b Lid 15e Magnetic body 15h Guide wall 15j Guided ridge 15k Guide hole 15m Guide surface 16 Optical fiber 16a Coating 16b Bare fiber 15A-15E Holder 14A-14E Holder base Fs Guide surface

Claims (5)

An optical fiber holder moving structure for moving the optical fiber holder along the longitudinal direction of the optical fiber with respect to a mounting object on which the optical fiber holder holding the optical fiber is detachably mounted,
A guided portion which is provided in the optical fiber holder and is guided to move with respect to the placement object of the optical fiber holder;
A guide unit that is provided in the placement object and guides the guided unit;
A magnetic adsorber that is provided in the optical fiber holder, and that adsorbs the optical fiber holder and the placement object by a magnetic adsorption force;
A fixed magnetic adsorber that is provided on the placement object and that attracts the optical fiber holder and the placement object by a magnetic adsorption force;
With
In the initial state in which the optical fiber holder is placed at a predetermined position on the placement object, the magnetic attractant and the fixed magnetic attractant act between the magnetic attractant and the fixed magnetic attractant. Disposed in the width direction of the optical fiber holder and arranged in the longitudinal direction so that a magnetic attraction force acts in the direction of pressing the guided portion against the guide portion,
By applying a force to the optical fiber holder of the initial state, the anti-pre in a state where said is pressed against the guided portion before Symbol guide portion by the Ki磁 air suction force, the optical fiber holder to the magnetic attraction force And moving the optical fiber holder. The magnetic adsorbent and the fixed magnetic adsorbent, one is a permanent magnet, moving the other optical fiber holder according to claim 1, which is a magnetic material elements that will be magnetically attracted to said permanent magnet Construction. 2. The moving structure of the optical fiber holder according to claim 1, wherein both of the magnetic attractant and the fixed magnetic attractant are permanent magnets. 4. The light according to claim 1, wherein a plurality of combinations of the magnetic attractant and the fixed magnetic attractant are disposed along a longitudinal direction of the optical fiber holder. 5. Fiber holder moving structure. In a fusion splicer for fusion-splicing optical fibers arranged opposite to each other at the tip,
A fusion splicer comprising the optical fiber holder moving structure according to any one of claims 1 to 4.

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