JP2006342626A - Joint metal fitting and segment joining method using this joint metal fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a segment joining method for shortening even a construction period, by facilitating assembling, without requiring high accuracy for assembling work, without simultaneously joining a segment and a piece and mutual rings by a highly reliable inexpensive joint metal fitting having high joining accuracy and strength, by easily and accurately assembling by the small number of part items. <P>SOLUTION: This joint metal fitting is composed of a male type joint metal fitting 1 arranged in mutually joining one side member and having a joining bar 3 extending in the other side member direction, and a female type joint metal fitting 2 arranged in the other side member, inserting the joining bar 3 of the male type joint metal fitting 1 and locking this joining bar 3. The joining bar 3 of the male type joining metal fitting 1 is slidably installed on a front plate 5 with a slide hole fixed to the one side member and having a slender hole. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to, for example, a joint fitting that is provided in a segment constituting a tunnel and joins them, and a joining method of a segment that uses this joint fitting.

  For example, in a shielded segment tunnel, when a tunnel wall body is constructed with a large number of segments, it is necessary to assemble and join the segments. This is because the segment pieces are assembled into a segment ring in the circumferential direction, and the assembled segment ring is used as the tunnel traveling direction. To join.

  Conventionally, such a joint is formed by embedding a joint plate having a hole in the joint end surface of the segment, and then removing the box on the rear side so that the joint end surfaces of the segments are brought into contact with each other to communicate with each other. Bolts are inserted into the holes, and nuts are screwed into the bolts, so that a large number of segments are sequentially joined together.

  As another method, there is a method in which a joint having a concave portion and a convex portion is embedded in the joint end face of the segment, and the convex portion side joint is fitted into the concave portion and fastened.

  However, in the first joining structure described above, a bolt must be inserted into a hole formed in the joint plate on the joining end surface of the segment, and a nut must be screwed into the bolt to tighten it, which is extremely complicated. It took time and effort.

  The second joint structure does not require the above-mentioned work, but it is necessary to insert the joints between the joint pieces between the segments and the joint faces between the rings at the same time, which requires extremely high assembly work accuracy. Is done.

  Therefore, as a solution to such inconvenience, it is possible to join segments etc. very easily, and it can be easily and accurately assembled with a small number of members, and the joining accuracy and strength are high, A highly reliable and inexpensive joint fitting has been proposed (see Patent Document 1).

  As shown also in FIG. 10, this is provided on the male joint fitting 1 having the joining rod 3 that is provided on one side member to be joined to each other and extends in the direction of the other side member, and on the other side member. The joint rod 3 of the male joint fitting 1 is inserted and the female joint fitting 2 for locking the joint rod is formed. The male joint fitting 1 has a tapered portion 8 on the distal end side of the joint rod 3. , And the female joint fitting 2 includes a cylindrical housing 11 having an insertion hole 10 in the center into which the joining rod 3 is inserted, and the cylindrical shape. Two semicircular locking members 12 obtained by dividing a ring corresponding to the width of the engaging concave step portion 4 into two in the housing 11 and urging these locking members 12 toward the inner peripheral side And the outer sides of the two semicircular locking members 12 are the positive sides of the leaf spring ring 13. Inscribed in the middle of the square side, also, in which the corners of an equilateral triangle of the leaf spring ring 13 is arranged so as to abut against the inner peripheral cylindrical housing 11.

  In the figure, reference numeral 19 denotes a clearance reinforcing washer, and the male joint fitting 1 has an embedded male pin 20 made of different diameter reinforcing bars as a main body portion, and the tip portion thereof is a steel joining rod 3.

  By adopting such a configuration, the joining rod of the male joint fitting is inserted into the female joint fitting, and the locking member is pushed and spread against the leaf spring ring by this joining rod, so that the locking member is joined to the joining rod. The engaging recess is inserted into the engaging recess to lock the joining rod, and the locking member is attached to the joining rod as a neck-like stopper so as to project to the outer periphery of the joining rod, thereby A female joint fitting can be joined. Note that it is a regular triangular leaf spring ring that biases the locking member toward the inner peripheral side, and the regular triangular leaf spring ring abuts the corner of the regular triangle against the inner circumference of the cylindrical housing. By arranging in this manner, the centers can be matched and accommodated in the cylindrical housing.

In addition, the locking member is two semi-circular members obtained by dividing the ring body into two parts, and the cylindrical member is formed so that the outside is inscribed in the center of the side of the equilateral triangle so that the centers coincide with each other. It can be accommodated in the inner and leaf spring ring bodies. As a result, it is possible to match the positions of the centers of the respective members for inserting the joining rod. As described above, the original shape can be accurately restored to any position in the cylindrical housing by the balance between the regular triangular leaf spring and the perfect circular ring.
JP 2003-336497 A

  The assembly of the segments must be joined both between the pieces and between the rings. The invention of Japanese Patent Application Laid-Open No. 2003-336497 is used as a joint fitting between segment pieces or between rings. When assembling, both joint end surfaces between pieces and joint end surfaces between rings are jointed respectively. The metal fitting is attached, the segment piece of the succeeding is joined to the segment ring assembled previously, the rings are joined, and then the segment pieces are joined between the pieces in this state.

  For this reason, not only does the number of parts increase, but the segment assembly requires the determination of the joint positions between the pieces and the rings at the same time, which requires high accuracy in the assembly work and the workability is not good. ing.

  The object of the present invention is to eliminate the inconveniences of the above-mentioned conventional example, and to join segments etc. very easily as a joint fitting, and to assemble easily and accurately with a small number of members. It is possible to reduce the number of parts, as well as the high accuracy, strength, reliability, and low cost, as well as the need to position the joints between the segment pieces and the rings simultaneously. Another object of the present invention is to provide a joint fitting for a segment that can be assembled easily without requiring high accuracy in the assembly work, and a joining method using the joint fitting.

  In order to achieve the above object, the present invention provides, as a joint fitting, first, a male joint fitting having a joining rod provided on one side member to be joined to each other and extending in the direction of the other side, and the other side. The male joint fitting is joined to the male joint fitting, and the male joint fitting is fixed to the member on the one side. The gist of the invention is that it is slidably mounted on a front plate with a slide hole having an elongated hole.

  Secondly, when the connecting rod is mounted on the front plate with the slide hole, the nut portion attached to the base portion of the connecting rod is slidably combined with the back surface of the front plate with the slide hole so as to surround the slide space of the nut portion. The gist is that the lid is attached to the front plate with a slide hole.

  Third, as a method of joining the segments, the male joint fitting having a joining rod provided on one side member to be joined to each other and extending in the direction of the other side, and provided on the other side member, The joint rod of the mold joint fitting is inserted into the female joint fitting for locking the joining rod, and the joint rod of the male joint fitting is fixed to the member on the one side and has a slotted hole. This is a method of joining segments using joint fittings that are slidably mounted on the front plate, where female joint fittings are provided on the joint surfaces of existing segments, and slides on the joint surfaces of other segments that join this segment Provide a male joint fitting with the direction aligned with the axial direction of the structure such as a tunnel, insert another segment adjacent to the existing segment, and connect the joint rod of the male joint fitting to the female joint fitting. Segment After joining the inter-piece is for summarized in that joining the inserted segment between the rings by further sliding the other segments.

  According to the first and third aspects of the present invention, the female joint fitting is provided on the joint surface of the existing segment, and the slide direction is set on the joint surface of the other segment to be joined thereafter. Since the male joint fitting is provided so as to match the direction, when another segment is inserted, the joining rod of the male joint fitting is fastened to the female joint fitting during the insertion, and the segment pieces are joined together. If another segment is further inserted, only the other segment is pushed into the joining rod, thereby joining the segment rings.

  By joining the segment pieces separately after joining the segment pieces in this way, it is not necessary to position the joints at the same time, and assembly is facilitated.

  According to the second aspect of the present invention, since the moving space of the nut portion attached to the base portion of the joining rod is covered with the lid, when the male joint fitting is embedded in the segment, the concrete enters the moving space. Can be prevented, and a moving space can be secured.

  As described above, the joint fitting of the present invention and the method of joining segments using the same are capable of joining segments and the like very easily, and with a small number of members, easily and accurately. It can be assembled, has high joining accuracy, strength, high reliability, and when the segment ring is assembled, the pieces are joined while another segment is inserted after the adjacent one, and then another segment is inserted. Since the rings are joined together, it is not necessary to join the pieces of the segment and between the rings at the same time. This eliminates the need for work time for the construction and shortens the construction period.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a partially cutaway side view showing an embodiment of the joint fitting of the present invention, FIG. 2 is a partially cutaway side view disassembled in the same manner, and FIG. 3 is an explanatory view of the same.

  The joint fitting of the present invention is also composed of a male joint fitting 1 and a female joint fitting 2 that are respectively provided on a concrete structure (member) such as a segment.

  The male joint fitting 1 has a joining rod 3 as a main body portion, a tip portion thereof is formed as a truncated cone-shaped tapered portion 8, and a base portion is formed in a screw portion 3a.

  A groove-like engaging concave step portion 4 having a certain width was formed with a slight gap on the lower side (rear side) of the tapered portion 8. Between the taper part 8 and the engagement concave step part 4 is a skirt part in which the taper part 8 extends.

  In the figure, reference numeral 5 denotes a front plate with a slide hole in which the joining rod 3 is slidably assembled. A long rectangular plate is formed with an elongated hole 5a, and a nut portion 6 is slidable on the back of the elongated hole 5a. The screw portion 3a of the joining rod is screwed into the nut portion 6. Thereby, the joining rod 3 protrudes forward from the front plate 5 with a slide hole.

  On the back side of the front plate 5 with slide holes, lid plates 7 are attached to the top, bottom, left, and right and the back so as to cover the sliding space of the nut portion 6.

  And this cover board 7 is joined to the anchor reinforcement 9 embed | buried under a concrete structure, and the male coupling metal fitting 1 is fixed to a concrete structure. When the concrete structure is a segment piece, the male joint fitting 1 is embedded in the joining end face of the segment.

  In the female joint fitting 2, an insertion hole 10 into which the joining rod 4 is inserted is formed in the center of the front end plate 14, and a cylindrical housing 11 having a rear end opened as a female receiving box, and the cylindrical housing 11. As a housing, there are a locking member 12 and a leaf spring ring 13, and a frustoconical taper portion 8 at the tip of the connecting rod 3 at the tip of the embedded anchor 15 made of a large-diameter different-diameter reinforcing bar as a main body portion. A recessed portion 16 into which the extending skirt portion is inserted and a screw portion 15a are formed at the front end of the outer periphery. The cylindrical housing 11 and the embedded anchor 15 are screwed together via the screw portion 15a.

  The locking member 12 is composed of two semicircular bodies 12 a and 12 b obtained by dividing a steel ring having a thickness corresponding to the width of the engaging concave step portion 4 of the joining rod 3.

  The leaf spring ring 13 is a regular triangular leaf spring that urges the locking member 12 toward the inner peripheral side, and is formed of a steel band, and the corner portion is bent with a rounded shape. Further, the size of the leaf spring ring 13 is such that the outside of the locking member 12 of the two semicircular bodies 12a and 12b is inscribed in the center of the regular triangle side of the leaf spring ring 13 and the steel The width of the band, that is, the depth of the leaf spring ring 13 is the same as the thickness of the locking member 12.

  Furthermore, the size of the leaf spring ring 13 is such that the corners of the regular triangle of the leaf spring ring 13 abut against the inner periphery of the cylindrical housing 11.

  Next, the usage will be described. First, in terms of assembly, in the female joint fitting 2, the cylindrical housing 11 is attached to the embedded anchor 15, and at this time, the locking member 12 and the leaf spring ring are placed in the cylindrical housing 11 as shown in FIG. Holds the body 13.

  FIG. 4 shows this state, and the leaf spring ring 13 is housed in the cylindrical housing 11 so that the corners of the regular triangle come into contact with each other.

  Further, the locking member 12 is accommodated in the leaf spring ring 13 so as to be inscribed in the center of the side of the equilateral triangle.

  In this way, the male joint fitting 1 is buried in the joining end face of the other segment 17 assembled after the segment piece, and the female joint fitting 2 is buried in the joining end face of the segment 18 assembled earlier than the other segments. To do. In this case, since the nut portion 6 of the male joint fitting 1 is surrounded by the lid body 7, the male joint fitting 1 is fixed to the segment by joining the lid body 7 to the anchor bars 9 embedded in the segment. However, the concrete does not enter the moving space of the nut portion 6. Moreover, the moving direction of the nut part 6 is made to correspond with the axial direction of structures, such as a tunnel.

  And when joining a segment between pieces, the rear segment 17 is joined to the joining surface of the existing segment 18, but this joining is performed by connecting the rear segment 17 to a structure such as a tunnel as shown in FIG. It moves in a direction (arrow direction in FIG. 7) perpendicular to the axial direction.

  As shown in FIG. 8, when the joining rod 3 of the male joint fitting 1 attached to the rear segment 17 is inserted into the insertion hole 10 of the cylindrical housing 11 of the female joint fitting 2 attached to the existing segment 18, the segment The pieces are joined together.

  In this manner, the distal end portion of the joining rod 3 of the male joint fitting 1 is inserted while expanding the locking member 12 provided in the cylindrical housing 11 of the female joint fitting 2 as shown in FIG. Then, as shown in FIG. 6, the locking member 12 enters the engagement concave step portion 4 of the joining rod 3 and attaches as a neck-like stopper. The locking member 12 has a thickness and firmly enters the engaging concave step portion 4 of the joining rod 3 to become a strong stopper. As a result, a sufficiently expected joining strength can be obtained for joining the male joint fitting 1 and the female joint fitting 2.

  The segment 17 is further inserted in a state where the male joint fitting 1 and the female joint fitting 2 are joined and the pieces are joined as described above. At this time, as shown in FIG. 9, the male joint fitting 1 and the female joint fitting 2 are still joined, but the joining rod 3 slides in the elongated hole 5a, so that the male joint fitting 1 The joint portion between the metal fitting 1 and the female joint metal fitting 2 does not move while maintaining a fixed position, and only the segment 17 advances.

  On the other hand, a female joint fitting 2 and a male joint described in Japanese Patent Application Laid-Open No. 2003-336497 are provided on the joint surface between the rings of the segment 21 assembled in advance and the joint surface between the rings of the rear segment 17. If the mold joint fittings 1 are respectively attached, the male joint fitting 1 and the female joint fitting 2 between the rings are fastened and the segment rings are joined by simply pushing the rear segment 17 further.

  Thus, after the pieces are joined, the rings are also joined, and the assembly of the segments is completed.

It is the partially cutaway side view which shows embodiment of the coupling metal fitting of this invention. It is a partially cutaway side view showing an embodiment of the joint fitting of the present invention. It is explanatory drawing of the partial notch | disassembled state which shows embodiment of the coupling metal fitting of this invention. It is a top view in the cylindrical housing which shows embodiment of the coupling metal fitting of this invention. FIG. 6 is a perspective view showing a first stage of joining of the male joint fitting and the female joint fitting in the embodiment of the joint fitting of the present invention. It is a perspective view which shows the 2nd step of joining of a male joint metal fitting and a female joint metal fitting in embodiment of the joint metal fitting of this invention. It is explanatory drawing which shows the 1st process of joining between the segment pieces which use the coupling metal fitting of this invention, and between rings. It is explanatory drawing which shows the 2nd process of joining between the segment pieces which use the coupling metal fitting of this invention, and between rings. It is explanatory drawing which shows the 3rd process of joining between the segment pieces which use the coupling metal fitting of this invention, and between rings. It is a partially cutaway side view of a disassembled state showing a conventional joint fitting.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Male joint metal fitting 2 ... Female joint metal fitting 3 ... Joining rod 4 ... Engaging concave step part 5 ... Front plate with a slide hole 5a ... Elongate hole 6 ... Nut part 7 ... Cover body 8 ... Tapered part 9 ... Anchor muscle DESCRIPTION OF SYMBOLS 10 ... Insertion hole 11 ... Cylindrical housing 12 ... Locking member 12a, 12b ... Semicircular body 13 ... Leaf spring ring 14 ... Front end plate 15 ... Embedded anchor 15a ... Screw part 16 ... Recess 17 ... K segment 18 ... Segment 19 ... Clearance reinforcement washer 20 ... Embedded male pin 21 ... Segment

Claims (3)

  Provided on one side member to be joined to each other, a male joint fitting having a joining rod extending in the direction of the other side member, and provided on the other side member, the joining rod of the male joint fitting is inserted, It consists of a female joint fitting that locks the joining rod, and the joining rod of the male joint fitting is slidably mounted on a front plate with a slide hole that is fixed to the member on the one side and has an elongated hole. A fitting fitting characterized by that.   The connecting rod is attached to the front plate with the slide hole by attaching the lid so that the nut attached to the base of the connecting rod is slidably combined with the back of the front plate with the slide hole and surrounds the sliding space of the nut. The joint fitting according to claim 1 attached to the front plate with a slide hole.   Provided on one side member to be joined to each other, a male joint fitting having a joining rod extending in the direction of the other side member, and provided on the other side member, the joining rod of the male joint fitting is inserted, It consists of a female joint fitting that locks the joining rod, and the joining rod of the male joint fitting is slidably mounted on a front plate with a slide hole that is fixed to the member on the one side and has an elongated hole. This is a method for joining segments using joint fittings, in which a female joint fitting is provided on the joint surface of an existing segment, and the slide direction is set on the joint surface of another segment joined to this segment, and the axial direction of a structure such as a tunnel After fitting the male joint fitting to the existing segment, inserting another segment adjacent to the existing segment, joining the joining rod of the male fitting fitting to the female fitting fitting, Segment Method of joining segments, characterized in that the further joining the inserted segment between ring and slide.

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