JP2005220655A - Segment joining structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a segment joining structure capable of keeping a fastening force constant even when a fitting degree is different in a fitting shaft of a male joint fitted in a fitting hole of a female joint. <P>SOLUTION: This segment joining structure is joined by fitting the fitting shaft 4 in the fitting hole 6 by arranging the male joint 2 having the tapered fitting shaft 4 on a contact plane of one segment among adjacent segments, and arranging the female joint 3 having the tapered fitting hole 6 for fitting the fitting shaft 4 on a contact plane of the other segment. A sliding member 9 sliding when a force of a specific value or larger is applied in the fitting direction of the fitting shaft 4 is interposed between the outer peripheral surface 4a of the fitting shaft 4 and the inner peripheral surface 6a of the fitting hole 6. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a joining structure of segments for joining adjacent segments together.

  A number of modularized segments are used as members for construction of shield tunnels. When the tunnel is constructed, the segments are closely connected and joined to both the circumference of the tunnel and the length direction of the tunnel. Each segment has a hole that communicates with the joint surface along the circumferential direction and the joint surface along the length direction when the joint surfaces are in contact with each other. They are connected by fastening with a connecting bolt inserted through the hole.

  However, it takes a lot of labor to manually insert a bolt into a hole provided for each joint surface of each segment and screw a nut into the bolt. Also, the joint structure by fastening bolts and nuts has become an obstacle to automatic assembly using a robot.

In order to solve such a problem, for example, a segment joint structure in which a male joint is provided on one joint surface of adjacent segments and a female joint is provided on the other joint surface has been proposed. The male joint has a tapered fitting shaft that narrows toward the tip, and the female joint has a tapered fitting hole that narrows from the insertion port toward the back. Therefore, the tip of the male joint is aligned with the insertion opening of the female joint, and the segment provided with the male joint is moved in the length direction of the tunnel, so that the adjacent segment can be The joining surfaces are easily drawn and joined (for example, refer to Patent Document 1).
JP 2001-2280082 A (page 3-4, FIG. 1)

  However, in the conventional segment joint structure described above, if the segment is actually assembled on site, segment manufacturing errors and assembly errors will occur, so the male joint fitting shaft will fit the female joint fitting at one joint location. It is inserted deeply into the hole to increase the fastening force, and at the other joining point, the fitting shaft of the male joint is inserted into the fitting hole of the female joint shallowly to reduce the fastening force. There is a problem that the fastening force is different. If the fastening force differs depending on the joint location, joining the segment to a joint location with a large fastening force will result in insufficient joining at the joint location with a small fastening force. When the segments are joined, the male joint and the female joint at the joint where the fastening force is large may be damaged.

  In the present invention, the above-described conventional problems are taken into account. Segment manufacturing errors and assembly errors occur, and the degree of fitting of the fitting shaft of the male joint to be fitted into the fitting hole of the female joint is determined. An object of the present invention is to provide a segment joining structure capable of keeping the fastening force constant even when different.

  According to the first aspect of the present invention, a male joint having a tapered fitting shaft is provided on a joint surface of one segment among adjacent segments, and the fitting shaft is disposed on a joint surface of the other segment. A female joint having a tapered fitting hole into which the fitting shaft is inserted, and a joining structure of a segment in which the fitting shaft is fitted and joined in the fitting hole, and the outer peripheral surface of the fitting shaft and the Between the inner peripheral surface of the fitting hole, there is a sliding member that slides when a force of a certain value or more is applied in the fitting direction of the fitting shaft.

  According to a second aspect of the present invention, in the segment joining structure according to the first aspect, the sliding member is parallel to an inner side surface contacting the outer peripheral surface of the tapered fitting shaft and a fitting direction of the fitting shaft. A sliding male portion having an outer side surface, and an inner side surface in contact with the outer side surface of the sliding male portion and an outer side surface in contact with the inner peripheral surface of the tapered fitting hole. In either one of the outer side surface of the sliding male part and the inner side surface of the sliding female part, a convex part that is sheared when a force of a predetermined value or more is applied in the fitting direction of the fitting shaft is attached. The other side of the outer surface of the sliding male part or the inner side surface of the sliding female part is characterized in that a concave part is formed by fitting the convex part and hooking the convex part.

  According to the joining structure of segments according to the present invention, a male joint having a tapered fitting shaft is provided on the joining surface of one segment, and a fitting shaft is fitted on the joining surface of the other segment. In the joint structure of a segment in which a female joint having a tapered fitting hole is provided and the fitting shaft is inserted into the fitting hole and joined, the outer peripheral surface of the fitting shaft and the inner peripheral surface of the fitting hole Since a sliding member that slides when a force of a certain value or more is applied in the fitting shaft insertion direction is interposed between the fitting shaft and the fitting shaft. When the fitting shaft enters the fitting hole to the position where the fastening force is generated, and when the fitting shaft is pushed in and a certain pressure is applied, the sliding member slides and the fitting shaft moves in the fitting direction. As a result, the fastening force between the male joint and the female joint is kept constant even when the fitting degree of the fitting shaft of the male joint inserted into the fitting hole of the female joint is different at a plurality of joint locations. Thus, the segments can be sufficiently joined to each other and the male joint and the female joint can be prevented from being damaged.

  Further, the sliding member has a sliding male part having an inner surface in contact with the outer peripheral surface of the tapered fitting shaft and an outer surface parallel to the fitting direction of the fitting shaft, and an outer surface of the sliding male part. The sliding female portion has an inner side surface in contact with and an outer side surface in contact with the inner peripheral surface of the tapered fitting hole, and either one of the outer side surface of the sliding male portion and the inner side surface of the front sliding female portion. Is provided with a convex portion that shears when a force of a certain value or more is applied in the fitting shaft insertion direction, and the convex portion is provided on either the outer surface of the sliding male portion or the inner surface of the sliding female portion. In the process of fitting the fitting shaft into the fitting hole, first, the outer peripheral surface of the fitting shaft and the inner surface of the sliding male portion are formed. The fitting shaft enters the fitting hole until the outer surface of the sliding male part and the inner surface of the sliding female part, and the outer surface of the sliding female part and the inner peripheral surface of the fitting hole contact each other. When the fitting shaft is pushed in and a certain pressure is applied, the convex portion shears, and the fitting shaft slides with the sliding male portion sliding on the inner surface of the sliding female portion. It moves in the insertion direction together with the part. Thus, after the convex portion is sheared, the fastening force between the male joint and the female joint can be kept constant.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a segment joining structure according to the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the adjacent segments 1 are joined together by rubbing the joining surfaces 1 a formed on the side end surfaces of the segments 1. The joint surface 1a of the segment 1 is provided with a male joint 2 and a recess 1b extending in the moving direction of the segment 1 when the segment 1 is joined. The recess 1b is formed in the recess 1b. A female joint 3 is provided. A male joint 2 provided on one segment 1 is coupled to a female joint 3 provided on the other segment 1, and a female joint 3 provided on one segment 1 is connected to a male joint 3 provided on the other segment 1. Coupled to the joint 2. Further, at least two male joints 2 or female joints 3 are provided on one joint surface 1 a of the segment 1.

  FIG. 2 is an exploded perspective view of a joining structure for joining adjacent segments 1, and FIG. 3 is a cross-sectional view of the joining structure of the segments 1. As shown in FIGS. 1, 2, and 3, the male joint 2 has a tapered fitting shaft 4 that narrows toward the tip. The fitting shaft 4 extends in the moving direction of the segment 1, and is formed at the distal end portion 5 a of the support portion 5 fixed to the joint surface 1 a of the segment 1. The front end portion 5 a of the support portion 5 is formed in a plate shape extending in the axial direction of the fitting shaft 4.

  The female joint 3 has a tapered fitting hole 6 that narrows from the insertion port 18 toward the back. The fitting hole 6 is formed in a cylindrical tip portion 7 a of the support portion 7 fixed in the hollow portion 1 b of the segment 1. A slit 8 extending in the axial direction of the fitting hole 6 is formed at the distal end portion 7 a, and one inner peripheral surface of the fitting hole 6 is opened by the slit 8. The tip 8 a of the support portion 5 of the fitting shaft 4 inserted into the fitting hole 6 enters the slit 8.

  Between the outer peripheral surface 4a of the fitting shaft 4 and the inner peripheral surface 6a of the fitting hole 6, there is a sliding member 9 that slides when a force of a certain value or more is applied in the fitting direction of the fitting shaft 4. ing. The sliding member 9 includes a cylindrical sliding male part 10 in which the fitting shaft 4 is inserted, and a cylindrical sliding part in which the sliding male part 10 is inserted and inserted in the fitting hole 6. The moving female part 11 is comprised.

  The sliding male portion 10 is formed with a tapered hole 16 into which the fitting shaft 4 is fitted in the central shaft portion of a cylindrical member, and is in contact with the outer peripheral surface 4 a of the tapered fitting shaft 4. Each has an inner surface 10 a and an outer surface 10 b parallel to the fitting direction of the fitting shaft 4. The hole 16 is formed so that the diameter on the insertion port side when the fitting shaft 4 is fitted is larger than the diameter on the tip side, and radially on the outer surface 10b of the end of the sliding male part 10 on the insertion port side. A plurality of projecting convex portions 12 are attached. For example, the convex portion 12 has a joint cut at the base portion, and is configured to shear in the fitting direction of the fitting shaft 4 when a force of a certain value or more is applied in the fitting direction of the fitting shaft 4. The sliding male part 10 is formed with a slit 13 that extends in the axial direction of the fitting hole 6 and faces the slit 8 of the female joint 3, and the slit 13 has a tip part 5 a of the support part 5. Is entered.

  The sliding female portion 11 is formed with a cylindrical hole 17 into which the sliding male portion 10 is inserted in the central shaft portion of the tapered member, and is in contact with the outer surface 10b of the sliding male portion 10. It has a side surface 11 a and an outer surface 11 b in contact with the inner peripheral surface 6 a of the tapered fitting hole 6. The sliding male part 10 is narrowed from the insertion port side to the tip when the fitting shaft 4 is fitted, and a convex part 12 is formed on the inner side surface 11a of the sliding female part 11 at the insertion port side. Are formed, and a plurality of concave portions 14 for engaging the convex portions 12 are formed. The sliding female portion 11 is formed with a slit 15 that extends in the axial direction of the fitting hole 6 and faces the slit 13 of the sliding male portion 10.

  Next, a method for joining the segments 1 using the segment joining structure having the above-described configuration will be described.

  First, as shown in FIGS. 2 and 3, the sliding member 9 is attached to the fitting shaft 4 in advance. Specifically, the sliding male part 10 is pushed in and inserted so as not to be disengaged from the fitting shaft 4, and the sliding female part 11 is fitted into the sliding male part 10 and the convex part 12 is completely fitted into the concave part 14. Push it to the position where it fits and insert it.

  Next, as shown in FIG. 1, the segments 1 are moved to the side of the adjacent segments 1, and the adjacent male joints 2 and the female joints 3 are connected to join the adjacent segments 1 to each other. Specifically, as shown in FIGS. 2 and 3, the male joint 2 provided in one segment 1 faces the female joint 3 provided in the other segment 1 and is provided in one segment 1. The segment 1 is aligned so that the female joint 3 faces the male joint 2 provided on the other segment 1. Then, the segment 1 is moved in the direction of the arrow shown in FIG. 1, and the fitting shaft 4 on which the sliding member 9 is mounted is fitted into the fitting hole 6 to connect the male joint 2 and the female joint 3.

  According to the segment joining structure having the above-described configuration, the male joint 2 having the tapered fitting shaft 4 is provided on the joint surface 1a of one segment 1, and the joint surface a of the other segment 1 is provided on the joint surface a. In the joint structure of the segment in which the female joint 3 having the tapered fitting hole 6 into which the fitting shaft 4 is fitted is provided and the fitting shaft 4 is fitted into the fitting hole 6 and joined. Between the outer peripheral surface 4a of the shaft 4 and the inner peripheral surface 6a of the fitting hole 6, a sliding member 9 that slides when a force of a certain value or more is applied in the fitting direction of the fitting shaft 4 is interposed. Therefore, in the process of fitting the fitting shaft 4 into the fitting hole 6, first, the fitting shaft 4 enters the fitting hole 6 to a position where a fastening force is generated, and the fitting shaft 4 is further pushed in to be constant. When the pressure is applied, the sliding member 9 slides and the fitting shaft 4 moves in the fitting direction. Accordingly, even if the fitting degree of the fitting shaft 4 of the male joint 2 fitted into the fitting hole 6 of the female joint 3 is different at a plurality of joint locations, the male joint 2 and the female joint 3 The fastening force can be kept constant, the segments 1 can be sufficiently joined together, and the male joint 2 and the female joint 3 can be prevented from being damaged.

  The sliding member 9 includes a sliding male part 10 having an inner side surface 10a in contact with the outer peripheral surface 4a of the tapered fitting shaft 4 and an outer side surface 10b parallel to the fitting direction of the fitting shaft 4, and a sliding member. The sliding male portion 10 includes an inner side surface 11 a that contacts the outer side surface 10 b of the moving male portion 10 and an outer side surface 11 b that contacts the inner peripheral surface 6 a of the tapered fitting hole 6. The outer side surface 10 b is provided with a convex portion 12 that is sheared when a force of a certain value or more is applied in the fitting direction of the fitting shaft 4, and the convex portion 12 is fitted to the inner side surface 11 a of the sliding female portion 11. Since the concave portion 14 for hooking the convex portion 12 is formed, first, in the process of fitting the fitting shaft 4 into the fitting hole 6, first, the outer peripheral surface 4 a of the fitting shaft 4 and the sliding male portion 10. Inner side surface 10a, outer side surface 10b of sliding male portion 10, inner side surface 11a of sliding female portion 11, and sliding female portion The fitting shaft 4 enters the fitting hole 6 to a position where the outer surface 11b of 1 and the inner peripheral surface 6a of the fitting hole 6 are in contact with each other. Part 12 shears from the root. When the convex portion 12 is sheared away from the outer surface 11b of the sliding female portion 11 and the fitting shaft 4 is further pushed, the sliding male portion 10 slides on the inner side surface 11a of the sliding female portion 11, The fitting shaft 4 moves in the fitting direction together with the sliding male part 10 that slides. Thereby, after the convex part 12 shears, the fastening force of the male joint 2 and the female joint 3 can be kept constant.

  The embodiment of the segment joining structure according to the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the scope of the present invention. For example, in the above-described embodiment, the sliding member 9 includes the hollow cylindrical sliding male part 10 and the sliding female part 11 in which the slits 13 and 15 are formed. The member 9 may be formed in a semi-cylindrical shape or a sectional fan shape, and a plurality of members 9 may be interposed between the outer peripheral surface 4a of the fitting shaft 4 and the inner peripheral surface 6a of the fitting hole 6.

  In the above-described embodiment, the convex portion 12 is attached to the end of the sliding male portion 10 on the insertion port side of the fitting shaft 4, and the end of the sliding female portion 11 on the insertion port side of the fitting shaft 4 is provided. Although the recessed part 14 is formed, this invention may form a recessed part in a sliding male part, and may form a convex part in a sliding female part, and a recessed part is an intermediate part of a sliding male part, or a fitting shaft. You may form in the edge part on the opposite side of this insertion port.

  In the above-described embodiment, a plurality of concave portions 14 are formed corresponding to the plurality of convex portions 12, respectively. However, in the present invention, as shown in FIG. The part 102 may be provided, and the concave part 104 facing the plurality of convex parts 102 may be continuously formed in the sliding female part 103. Accordingly, when the sliding male part 101 is inserted into the sliding female part 103, it is not necessary to align the convex part 102 and the concave part 104, and the sliding member 100 can be easily assembled.

  In the above-described embodiment, the sliding male part 10 is inserted into the fitting shaft 4 in advance, and the sliding female part 11 is inserted into the sliding male part 10 so that the sliding male part 10 and the sliding male part 10 are slid. The fitting shaft 4 on which the sliding member 9 composed of the moving female part 11 is mounted is inserted into the fitting hole 6. In the present invention, the sliding female part is inserted into the sliding male part. The sliding member may be assembled, the sliding member may be disposed in the fitting hole, and the fitting shaft may be fitted into the fitting hole in which the sliding member is inserted. In the present invention, the sliding male part is previously inserted into the fitting shaft, the sliding female part is disposed in the fitting hole, and the sliding female part is attached to the fitting shaft on which the sliding male part is mounted. You may make it fit in the inserted fitting hole.

1 is an overall schematic diagram showing an embodiment of a segment joining structure according to the present invention. It is a disassembled perspective view showing embodiment of the joining structure of the segment which concerns on this invention. It is sectional drawing showing embodiment of the junction structure of the segment which concerns on this invention. It is a fragmentary perspective view showing other embodiment of the joining structure of the segment which concerns on this invention.

Explanation of symbols

1 Segment 1a Joint surface 4 Fitting shaft 2 Male joint 6 Fitting hole 3 Female joint 9, 100 Sliding member 10, 101 Sliding male part 11, 102 Sliding female part 12, 103 Convex part 14, 104 Concave part

Claims (2)

Among adjacent segments, a male joint having a tapered fitting shaft is provided on the joint surface of one segment, and a tapered fitting into which the fitting shaft is fitted is provided on the joint surface of the other segment. In a joint structure of a segment in which a female joint having a joint hole is provided and the fitting shaft is inserted into the fitting hole and joined,
Between the outer peripheral surface of the fitting shaft and the inner peripheral surface of the fitting hole, there is a sliding member that slides when a force of a certain value or more is applied in the fitting direction of the fitting shaft. Segment joint structure characterized by In the joining structure of the segment of Claim 1,
The sliding member includes a sliding male part having an inner side surface in contact with the outer peripheral surface of the tapered fitting shaft and an outer side surface parallel to the fitting direction of the fitting shaft, and an outer side of the sliding male part. It is composed of sliding female parts each having an inner surface in contact with the side surface and an outer surface in contact with the inner peripheral surface of the tapered fitting hole,
Either one of the outer surface of the sliding male portion and the inner surface of the sliding female portion is provided with a convex portion that shears when a force of a certain value or more is applied in the fitting direction of the fitting shaft. Segment joining, characterized in that a concave portion is formed on either the outer surface of the moving male portion or the inner side surface of the sliding female portion, and the concave portion is fitted to the convex portion. Construction.

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