JP6176954B2 - Segment connection joint and segment - Google Patents

Description

The present invention provides a male joint member having an engagement convex portion that can be changed between a diameter-expanded state and a diameter-reduced state in one segment to be connected, and the male joint member to be inserted is A female joint member having an engaged recess that can be freely engaged by expanding the engagement convex portion is provided in the other segment to be connected, and the male joint member is used as the female joint member. insert and the engagement projection and the segment connecting joint for use in connecting to Rousset segment connecting method both segments to each other in a state retained by engaging the engaged concave portion, and the segment connecting joint Related segment technology

Conventionally, as this type of segment technology, the female joint member of the segment coupling joint is configured such that the inner peripheral wall of the insertion port that receives the male joint member is formed as a tapered surface having a smaller diameter toward the back side. Some of them had an engaged recessed portion with an enlarged diameter. In addition, the male joint member of the segment coupling joint is provided with a plurality of locking pieces extending along the circumferential direction from the base end portion to the distal end side (insertion direction side). An engagement convex portion protruding radially outward was formed (see, for example, Patent Document 1).
Such a connection method between the segment connection joints is performed by inserting the male joint member into the insertion port of the female joint member, and each engagement at the tip of the locking piece as the insertion deepens. A convex part receives the pressing force of a diameter reduction direction from a taper surface. As a result, the locking piece portion enters the engaged recessed portion side while being elastically deformed so that the tip end side thereof is displaced in the diameter reducing direction. Further, when the insertion is deepened and the engaging convex part passes through the small diameter hole part of the female joint member and is inserted to the large diameter part of the flange, it expands in the diameter expanding direction by the elastic restoring force and engages with the engaged concave part. Can be made.

Japanese Patent Laid-Open No. 11-229784 (FIG. 1)

According to the above-described conventional segment technology, with the insertion of the male joint member into the female joint member, the engagement piece portion of the male joint member has the engagement convex portion at the tip of the female joint member. It receives a pressing force in the direction of diameter reduction from the taper surface and elastically deforms in the direction of diameter reduction, but this pressing force also acts in the direction of pushing back the male joint member. It is added as an insertion resistance force to the member.
Therefore, unless a large insertion force is applied, there is a possibility that the engagement position between the engagement convex portion and the engagement concave portion cannot be inserted, and there is a problem that the segments cannot be reliably connected.
Further, when the insertion force is increased, there is a problem that the segment assembling apparatus must be enlarged and the cost is increased.

  Accordingly, an object of the present invention is to provide a segment technique that solves the above-described problems and enables the segments to be more reliably connected without applying a large insertion force.

The characteristic configuration of the segment connecting method is that the male joint member provided with a male joint member having an engaging convex portion that can be changed between a diameter-expanded state and a diameter-reduced state is provided in one segment to be connected and inserted. A female joint member having an engaged recess that can be engaged by expanding the engagement convex portion of the joint member is provided in the other segment to be connected, and the male joint member is connected to the female joint. A segment connecting method for connecting both segments in a retaining state by inserting into a mold joint member and engaging the engaging convex part and the engaged concave part, wherein the segment is connected to the female joint member The insertion of the male joint member is performed by reducing the diameter of the engaging convex portion in advance and maintaining the reduced diameter state.

According to this characteristic configuration, the male joint member is inserted into the female joint member by reducing the diameter of the engaging convex portion in advance and maintaining the reduced diameter state. to an engaging convex portion of the male coupling member, it can be avoided that the inner peripheral surface of the insertion opening of the female joint member is strongly abuts the engaging portion and the engaged recess Smoothing's Can be engaged.
Therefore, the segments can be reliably connected without applying a large insertion force.
As a result, it is not necessary to increase the size of the segment coupling device, and it is possible to prevent cost increase.

In the first characteristic configuration of the present invention, a male joint member having an engagement convex portion that can be changed between an enlarged diameter state and a reduced diameter state is provided in one segment to be connected and inserted. A female joint member having an engaged recess that can be engaged by expanding the diameter of the engaging convex portion of the male joint member is provided in the other segment to be connected, and the engaging convex portion is The diameter is reduced in advance, and the male joint member is inserted into the female joint member while maintaining the reduced diameter state, and the engagement convex portion and the engagement concave portion are engaged to prevent the drop. A segment coupling joint for use in a segment coupling method for coupling two segments to each other , wherein the male coupling member is disposed at a cylindrical barrel portion having the same outer diameter and a tip of the barrel portion. consists to the engagement projection having a diameter larger than the section, the engagement projection of the male coupling member, Yes sexually contracted freely configured, the diameter means for posture holding the reduced diameter state against the engaging protrusion on the elastic restoring force, along said insertion direction of the male coupling member male A posture of the diameter-reducing means is provided in the male joint member by being arranged on the outer peripheral portion of the engagement convex portion so as to be movable with respect to the mold joint member. the diameter reduction releasing means for releasing the retaining force, the engagement at the convex portion of the insertion process, the female coupling constituted by the blocking portion abutting blocking only entry of the diameter means to said female coupling member The diameter reducing means is a cylindrical member having an inner diameter substantially the same as the outer diameter of the body part, and the corners on the outer peripheral side of the engaging convex part are chamfered obliquely, a posture can be held in diameter state the engagement convex portion by pushing said reduced diameter section from the front end side of the male coupling member There is the time.

According to the first characteristic configuration of the present invention, since the diameter reducing means is provided in the male joint member, the male joint member is held in a reduced diameter state before being inserted into the female joint member. The male joint member can be smoothly inserted into the female joint member as it is without a large resistance acting.
Furthermore, when the engagement operation between the two joint members is performed, the posture holding force of the diameter reducing means is released by the diameter reducing means, so that the engagement convex portion is restored to the expanded diameter state by its own elastic restoring force. Therefore, the engaging convex portion can be reliably engaged with the engaged concave portion.
Accordingly, the segments can be more reliably connected without applying a large insertion force, and it is not necessary to increase the size of the segment connecting device, thereby preventing an increase in cost.
The diameter reducing means is arranged on the outer peripheral portion of the engaging convex portion so as to be movable with respect to the male joint member along the insertion direction of the male joint member. It can be surrounded and protected by a diameter means. Therefore, for example, even when another object is inadvertently pressed against the engaging convex portion, it is possible to prevent the engaging convex portion from being damaged or deformed by the diameter reducing means. As a result, it is possible to stabilize the shape of the engaging convex portion that is exposed to the outside and easily breaks or deforms, and the engagement between the engaging convex portion and the engaged concave portion can be made more reliable.
Further, the diameter reducing means is constituted by a blocking part that prevents only the diameter reducing means from entering in the process of inserting the engaging convex part into the female joint member, so the diameter reducing means is attached. By simply inserting the male joint member in the state into the female joint member, the blocking portion can block only the diameter-reducing means from entering at a predetermined position in the insertion process. Therefore, in the subsequent insertion process, the engagement convex portion is pulled out from the diameter reducing means to the distal end side, and the reduced diameter state is released, and accordingly, the diameter is expanded by the elastic restoring force of the engagement convex portion. The force to be restored acts on the female joint member.
Therefore, in a series of processes in which the male joint member is simply inserted into the female joint member, the engagement convex portion is automatically switched from the reduced diameter state to the expanded diameter state, and a simpler connection operation ensures a more secure connection state. Can be created.
Since the diameter reducing means is constituted by a cylindrical member, the manufacturing cost of the diameter reducing means can be reduced by simplifying the structure.
Further, in a state where the contracted posture of the engaging convex portion is maintained, the elastic restoring force of the engaging convex portion can be efficiently borne as a tensile stress along the circumferential direction of the cylindrical member.

According to a second characteristic configuration of the present invention, a plurality of slits are provided along the longitudinal direction from the front end of the male joint member, so that the engagement convex portion is configured to be elastically reduced in diameter. is there.

According to the second characteristic configuration of the present invention, the engagement convex portion can be elastically reduced in diameter.

According to a third characteristic configuration of the present invention, the diameter reducing means is configured such that the maximum outer diameter size of the engagement convex portion in the reduced diameter holding state is the same or substantially the same as the minimum inner diameter size of the insertion port of the female joint member. It is where it is formed to become.

According to the third characteristic configuration of the present invention, in the diameter reducing means, the maximum outer diameter size of the engagement convex portion in the reduced diameter holding state is the same as or substantially the same as the minimum inner diameter size of the insertion opening of the female joint member. Therefore, when the engagement convex portion passes through the insertion port and is inserted so as to reach a predetermined engagement position, the engagement convex portion comes into contact with the insertion resistance in the insertion port. Therefore, a smooth engagement operation can be realized.
Further, since the maximum outer diameter dimension of the engagement convex portion in the reduced diameter holding state is not too thin, it is possible to secure the maximum member cross-sectional area and increase the connection strength between the joint members. Furthermore, since the amount of diameter reduction displacement with respect to the engagement convex portion can be minimized, the diameter reduction displacement is accommodated in the elastic deformation region of the member and elastically restored to a predetermined engagement state when engaged with the engagement concave portion. And can be engaged more reliably.

According to a fourth characteristic configuration of the present invention, the diameter reducing means is located over the two segments in a connected state of the two segments, and is formed so as to be able to bear a shearing force along the butting surfaces of the two segments. It is in.

According to the fourth characteristic configuration of the present invention, the shearing force along the abutting surfaces of both segments can be borne by the diameter reducing means.
Therefore, in addition to the connection strength between the two segments due to the engagement between the engagement convex portion and the engagement concave portion, the shear strength by the diameter reducing means can be expected, and the segment connection strength can be enhanced. .

The 5th characteristic structure of this invention exists in the place provided with the segment connection coupling as described in any one of Claims 1-4 .

According to the 5th characteristic structure of this invention, the segment which inherited the effect of the segment connection coupling as described in any one of Claims 1-4 as it is can be provided.
Accordingly, the segments can be reliably connected without applying a large insertion force, and it is not necessary to increase the size of the segment connecting device, thereby preventing an increase in cost.

Perspective view showing segments Sectional drawing of the segment principal part which shows the connection procedure of a joint member Sectional drawing of the segment principal part which shows the connection procedure of a joint member Sectional view of the main part of the segment showing the connection status of the joint members Exploded perspective view showing the body of the male joint member Sectional drawing of the segment principal part which shows the connection procedure of the coupling member of another embodiment Sectional drawing of the segment principal part which shows the connection condition of the coupling member of another embodiment Sectional drawing of the segment principal part which shows the connection procedure of the coupling member of another embodiment Sectional drawing of the segment principal part which shows the connection condition of the coupling member of another embodiment Sectional drawing of the segment principal part which shows the connection procedure of the coupling member of another embodiment Sectional drawing of the segment principal part which shows the connection condition of the coupling member of another embodiment

  Embodiments of the present invention will be described below with reference to the drawings.

  The segment technology of the present invention includes a female joint member disposed on the connecting surface (butting surface) of one segment and a male joint member disposed on the connecting surface (butting surface) of the other segment. The adjacent segments are connected by engaging the male joint member and the female joint member.

  As shown in FIG. 1, the segment coupling joint J includes a female coupling member 10 disposed on one coupling surface (corresponding to the butting surface) 1 a of the segment 1 and the other coupling surface (matching surface on the butting surface). Equivalent) It is comprised by a pair with the male coupling member 20 arrange | positioned by 1b.

  As shown in FIG. 2, the female joint member 10 is provided with a body portion 12 having a hole portion (corresponding to an insertion port) 11 at one end and an anchor portion 13 for the concrete of the segment 1 at the other end. It is a member. In the present embodiment, the female joint member 10 is provided at a position entering the back side from the connecting surface 1 a of the segment 1, and is introduced into the segment 1 as a guide to the hole 11 of the female joint member 10. A hole 2 is formed. The introduction hole 2 has an inner peripheral surface 2 a extending from the connecting surface 1 a of the segment 1 to the opening end of the hole 11 of the female joint member 10 so as to be constricted and inclined.

The hole portion 11 is configured to include an opening edge portion 11a and a diameter-expanded hole portion (corresponding to a recessed portion to be engaged) 11b that extends in the flange, and an engaging portion (described later) of the male joint member 20 is provided. By expanding the diameter while passing through the opening edge portion 11a and entering the expanded diameter hole portion 11b, the joint members can be engaged with each other in a retaining state (see FIG. 4).
The opening edge 11a is chamfered at the corner of the inner peripheral edge, and prevents the hook when the male joint member 20 enters, and the axis of the female joint member 10 by the chamfered portion. Can be guided so that the axis of the male joint member 20 is along the axis.

The male joint member 20 is a joint member in which a body portion 21 to be inserted into the female joint member 10 is formed at one end, and an anchor portion 22 embedded in the segment 1 is provided at the other end.
As shown in FIG. 5, the male joint member 20 has a barrel portion 21 that is formed in a cylindrical shape. The barrel portion 21 has a longitudinal direction from the middle portion to the distal end in the distal insertion axis direction ( A plurality of slits s are provided along the longitudinal direction. The slits s are provided at regular intervals in the circumferential direction of the body portion 21.

Each part between the adjacent slits s in the trunk | drum 21 is comprised as the latching piece part 21a by which a front end side becomes a free end, and this latching piece part 21a is elastically deformable along a diameter reduction direction in the free end side. Is formed.
Further, an engaging portion (corresponding to an engaging convex portion) 21b that is engaged with the female joint member 10 is provided at the distal end portion of the locking piece portion 21a so as to protrude in a claw shape on the outer peripheral side of the cylinder. Yes.
In addition, the corner | angular part of the front-end outer peripheral side of the engaging part 21b is chamfered diagonally, and when entering the female coupling member 10, it is hard to catch.

A cylindrical member 23 (corresponding to a diameter-reducing means) 23 that holds the engaging part 21b in a reduced-diameter state against an elastic restoring force is externally fitted to the body part 21 so as to be relatively movable along the longitudinal direction. I'm allowed.
In addition, a rubber plug 24 made of urethane rubber and formed in a cylindrical shape is fitted in the hollow portion in the cylinder at the distal end portion of the body portion 21.

  As shown in FIG. 2, the cylindrical member 23 is configured by integrally connecting a first cylindrical member 23 </ b> A and a second cylindrical member 23 </ b> B that are divided into two in the cylindrical axis direction. The inner diameter of each of the cylindrical members 23A and 23B is set to the same (or substantially the same) value as the inner diameter of the opening edge portion 11a of the female joint member 10. Further, the first cylinder member 23A located on the front end side in the insertion direction is formed to have the same thickness over the entire length, and the second cylinder member 23B located on the rear end side is formed to be thicker on the rear end side. It is.

As the male joint member 20 is inserted into the female joint member 10 with the tubular member 23 fitted to the body portion 21, the front end surface of the first tubular member 23A is, as shown in FIG. Since it abuts against the insertion side end surface (corresponding to the blocking portion) N of the opening edge portion 11a, the tube member 23 is prevented from entering further.
Subsequently, when the male joint member 20 is inserted, the locking piece portion 21a enters the hole portion 11 while sliding forward in the cylindrical member 23 with the reduced diameter state.

When the engaging portion 21b of the locking piece portion 21a that has entered passes through the opening edge portion 11a and reaches the enlarged diameter hole portion 11b, its own elastic restoring force and the elastic restoring force of the rubber plug 24 fitted therein The diameter is expanded by the action of and restored to the original posture. In this state, the engaging portion 21b engages with the enlarged-diameter hole portion 11b in an internally fitted state, so that both the joint members can be connected in a retaining state.
Therefore, the diameter reducing posture holding force acting on the engaging portion 21b from the tubular member 23 can be released by the opening edge portion 11a. The opening edge portion 11a corresponds to a diameter reducing means.

  The second cylindrical member 23B has an outer peripheral surface along the inner peripheral surface 2a of the introduction hole 2 (stenosis) of the segment 1 when the first cylindrical member 23A is in contact with the opening edge portion 11a. The inner circumferential surface 2a of the introduction hole 2 is used as a guide surface, and can be guided so that the axis of the cylindrical member 23 matches the axis of the female joint member 10. Further, the male joint member 20 is prevented from moving in the radial direction in the introduction hole 2.

  Further, the second cylinder member 23B is set to have a length dimension so as to be located over both segments 1 in a connected state between the two segments 1, and a shear force along the connecting surfaces 1a and 1b of both segments 1 is applied to the body. In addition to the portion 21, it is configured to be able to bear in the vicinity of the rear end portion of the second cylindrical member 23B (see FIG. 4).

  Incidentally, since the cylindrical member 23 is divided into two parts, the production of each cylindrical member can be simplified and the cost can be reduced, and in particular, the second cylindrical member 23B that bears the shearing force between the segments 1. Can be made of a high-strength material, the degree of freedom in selecting the material is improved, and cost reduction as a member can be realized.

  According to the segment technique of the embodiment, the male joint member 20 is inserted into the female joint member 10 while the engaging portion 21b is previously reduced in diameter and the reduced diameter state is maintained. The resistance during insertion can be reduced, and the segments can be reliably connected without applying a large insertion force. As a result, it is not necessary to increase the size of the segment coupling device, and it is possible to prevent cost increase.

[Another embodiment]
Other embodiments will be described below.

<1> The diameter-reducing means 23 is not limited to one integrally formed by the two divided members of the first cylindrical member 23A and the second cylindrical member 23B described in the previous embodiment. These members may be configured, or may be configured integrally with three or more divided members.
Further, the diameter reducing means 23 may be configured by lacking a member corresponding to the second cylindrical member 23B having a function of bearing a shearing force between segments.
For example, an example in which the diameter reducing means 23 is configured without a member corresponding to the second cylinder member 23B is as shown in FIGS.
According to this embodiment, the diameter reducing means 23 itself is constituted only by the first cylindrical member 23A described in the previous embodiment. Therefore, when the male joint member 20 is inserted into the female joint member 10, the effect of maintaining the reduced diameter state of the engaging portion 21b can be exhibited as well. Further, in the case of this embodiment, a shear resistance cylindrical member T bearing a shearing force acting along the connecting surfaces 1a and 1b of the segment 1 is separately fitted on the base end portion of the locking piece portion 21a in the body portion 21. I'm allowed.
Since the shear resistance cylindrical member T is provided in the trunk portion 21, the shear resistance cylindrical member T is located over the connection surfaces 1a and 1b of the segment 1 in the connected state of the segments 1 as shown in FIG. By the cooperative action of the body portion 21 and the shear resistance cylindrical member T, the shearing force can be increased.

<2> The diameter reducing means 23 is not limited to the one configured by the cylindrical member that is continuous over the entire circumference described in the previous embodiment. For example, a section in which a part in the circumferential direction is discontinuous. You may comprise by the thing of "C" shape.

<3> The diameter reducing means 23 is not limited to the configuration in which the posture of the reduced diameter state is maintained by contacting the outer peripheral portion of the engaging convex portion 21b described in the previous embodiment. For example, FIGS. As shown in FIG. 3, a “U” -shaped pin member P that holds the front end portions of the opposing locking piece portions 21a in the radially close state may be attached. In this case, as the diameter reducing means, a cutting portion 14 may be provided at the bottom portion of the diameter expanding hole portion 11b so that the pin member P that has entered may be cut.
As another embodiment, as shown in FIGS. 10 and 11, a circumferential groove 25 opened on the rear end side of the insertion is formed in the inner peripheral portion of the locking piece 21a, and the locking piece 21a. The hook-shaped locking member 26 is positioned in the inner space of the inner wall of the locking member 26 and the locking piece 26 is elastically deformed in the reduced diameter direction, and the circumferential portion of the locking member 26 is fitted into the circumferential groove 25. By combining them, it may function as a diameter reducing means. In this case, the diameter reducing means can be constituted by a protrusion 27 provided on the bottom portion of the diameter expanding hole portion 11b. Therefore, the locking member 26 that has entered the hole together with the locking piece portion 21a is disengaged from the circumferential groove 25 by being prevented from entering by the protrusion 27, and the reduced diameter state of the engaging convex portion 21b is released.

<4> The female joint member 10 and the male joint member 20 are not limited to those whose cross-sectional shape described in the previous embodiment is based on a circle, but are those based on a polygonal shape, for example. There may be.
Further, the female joint member 10 is not limited to the embodiment in which the female joint member 10 enters the back side of the connection surface 1a of the segment 1. For example, the female joint member 10 is connected to the connection surface 1a of the segment 1 or the vicinity thereof. The structure extended to may be sufficient. Therefore, a part or all of the introduction hole 2 may be formed by the female joint member 10.
The male joint member 20 and the female joint member 10 are usually formed of a metal material. However, if the strength and the function are acceptable, a part or all of the male joint member 20 and the female joint member 10 are made of other materials such as synthetic resin and ceramics. It may be made of a material.
In the previous embodiment, the inner peripheral surface 2a of the introduction hole 2 and the outer peripheral surface of the cylindrical member 23 are both inclined to promote the alignment operation. However, at least one of them has the inclined surface. It may not be provided, and only a part may be an inclined surface.

  In addition, as mentioned above, although the code | symbol was written in order to make contrast with drawing convenient, this invention is not limited to the structure of an accompanying drawing by this entry. In addition, it goes without saying that the present invention can be carried out in various modes without departing from the gist of the present invention.

1 Segment 1a Connecting surface (equivalent to butt surface)
1b Connecting surface (equivalent to butt surface)
10 Female joint member 11 Hole (corresponding to insertion slot)
11a Opening edge (corresponding to the diameter reducing means)
11b Expanded hole (equivalent to engaged recess)
20 Male joint member 21b Engagement part (equivalent to engagement convex part)
23 Cylinder member (equivalent to diameter reducing means)
N Insertion side end face (equivalent to blocking part)

Claims (5)

A male joint member having an engagement convex portion that can be changed between an expanded state and a reduced diameter state is provided in one segment to be connected, and the engaging convex portion of the male joint member to be inserted A female joint member having an engaged recess that can be engaged by expanding the diameter is provided in the other segment to be connected, and the engagement protrusion is previously reduced in diameter, and the reduced diameter thereof is provided. Segment connection for connecting both segments in a retaining state by inserting the male joint member into the female joint member while maintaining the state and engaging the engaging convex part and the engaged concave part A segment coupling joint used in a method,
The male joint member is composed of a cylindrical trunk portion having an outer diameter of the same diameter and the engaging convex portion disposed at the tip of the trunk portion and having a larger diameter than the trunk portion,
The engagement convex portion of the male joint member is configured to be elastically contractible in diameter.
The diameter reducing means for maintaining the posture of the engagement convex portion in a reduced diameter state against an elastic restoring force is movable with respect to the male joint member along the insertion direction of the male joint member. It is arranged on the outer periphery of the engaging convex part and provided on the male joint member,
The diameter reducing means for releasing the posture holding force of the diameter reducing means in accordance with the engaging operation of the both joint members is provided in the process of inserting the engaging projection into the female joint member. It is composed of a blocking portion that blocks contact only and is provided in the female joint member ,
The diameter-reducing means is a cylindrical member having an inner diameter substantially the same as the outer diameter of the body part, and the corners on the outer peripheral side of the engaging convex part are obliquely chamfered, and the diameter-reducing means is A segment coupling joint capable of maintaining the posture of the engagement convex portion in a reduced diameter state by being pushed in from the front end side of the male joint member . The segment coupling joint according to claim 1, wherein the engagement convex portion is configured to be elastically contractible by providing a plurality of slits along a longitudinal direction from a front end of the male joint member. The diameter reducing means is formed such that a maximum outer diameter dimension of the engagement convex portion in a reduced diameter holding state is the same or substantially the same as a minimum inner diameter dimension of an insertion port of the female joint member. The segment coupling joint according to 1 or 2 . The diameter means the located over the both segments in the connecting state of the two segments together, and said any one of claims 1 to 3, the shearing force along the abutting surfaces of both segments are then freely formed burden The described segment coupling joint. Segment and a segment connecting joint according to any one of claims 1-4.

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