JP3810652B2 - Junction structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to suitable junction structure using the case of joining the segments with each other are large numbers joined to constitute a cylindrical tunnel wall.
[0002]
[Prior art]
For example, when a cylindrical tunnel wall is configured, the segments are generally joined together by bolts. As a structure for joining segments with this bolt, a joint having holes that communicate with each other when the joint surfaces are brought into contact with each other is embedded in the vicinity of the joint surface of the segments. In general, a structure in which a bolt is inserted into a hole and a nut is fastened and joined to the bolt in a state where the joint surfaces of the segments are in contact with each other so as to communicate with each other. There is also a structure in which insert fittings which are nut members are embedded in the mutual segments, and bolts penetrating through the adjacent segments are fastened and joined together.
[0003]
[Problems to be solved by the invention]
However, the above-described structure has a problem in that a very complicated operation of inserting a bolt through a hole formed in the joint surface of the joint at the construction site and fastening a nut to the bolt is required. In addition, in the above-described joining structure, it is necessary to install the segments by accurately communicating the hole portions of the joint.
[0004]
This invention is made | formed in view of the said situation, and aims at provision of the junction structure which can join segments very easily.
[0005]
[Means for Solving the Problems]
The present invention employs the following means in order to solve the above problems.
That is, the bonding structure of claim 1 wherein the segments each other, a joint structure for joining the abutted joint surfaces of each other, whereas provided on the side of the segment toward the other side segment extending and joining rods, the result being joined when the other side of the junction rod have been found provided on segments are inserted by a bonding tool for fixing the junction rod, the joint rod, the axis portion, A plurality of engaging portions annularly arranged around the axial center and spaced radially outward, and when these engaging portions are respectively connected to the axial center and viewed from the front end side of the joining rod A plurality of elastic portions that are curved in one direction around the axial center portion and are elastically deformable on the axial center side, and each of the locking portions has presence or absence of a compression force from the periphery thereof The outer diameter of the circle formed by the outer periphery of these locking parts The joint is variable between a large diameter and a small diameter, and the connector has an inner diameter dimension larger than the small diameter and smaller than the large diameter, and an inner diameter dimension that is continuous with the introduction section and larger than the introduction diameter. An insertion space portion is provided , and either one or both of the locking portions and the introduction portion are formed with guide surfaces that taper in the insertion direction of the joining rod .
[0006]
According to the joint structure according to the first aspect, the bonding bar provided on one of the segments, if brought close between each segment to be inserted into connectors provided on the other of the segments, each engaging the joining rod The stoppers come into contact with the introduction part of the connector and receive a compression force, which is transmitted to each elastic part and elastically deforms so that these elastic parts bend in one direction. The diameter is reduced from a large diameter to a small diameter. Moreover, when inserting the contact Gobo in connectors, caught becomes less likely to occur between the inlet portion and the latching portion by the guide surface, so that smooth insertion operation is derived. When the insertion of the joining rod is further advanced, each locking portion reaches the insertion space portion beyond the introduction portion, and is released from the compression force received from the introduction portion, so that the original large diameter is obtained by the elastic force of the elastic portion. Return. Each locking portion expanded in diameter in this way becomes larger than the inner diameter of the introduction portion and engages with this introduction portion, so that the respective members are joined together by this engagement force.
[0007]
The joint structure according to claim 2, wherein, in the joint structure according to claim 1, wherein an elastic portion consisting of the axis portion and the locking portion and the curved plate is characterized in that it is an integral molded product of a resin molding.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
The present invention is a joining structure that joins segments in a state in which the joining surfaces of each other are abutted, and an embodiment thereof will be described below with reference to FIGS. 1 to 5. Of course, it should not be construed as limited thereto. Hereinafter, the case where the junction structure according to the present embodiment is applied to the junction between the segments constituting the tunnel will be described.
In addition, FIG. 1 is a figure which shows the joining structure of this embodiment, Comprising: It is sectional drawing in a joining state. 2 is a cross-sectional view of the joint structure as seen from the line AA in FIG. Moreover, FIG. 3 is a figure which shows the principal part of the junction structure, Comprising: It is the B section enlarged view of FIG. Moreover, FIG. 4 is a figure which shows operation | movement of each latching | locking part and each elastic part of the same joining structure, Comprising: It is a figure at the time of facing from the front end side of a joining rod. FIG. 5 is a diagram showing the joint structure, and is a cross-sectional view of the state before joining.
[0011]
As shown in FIG. 1, the joining structure of the present embodiment includes a joining rod 10 fixed to one segment a (member) and extending toward the other segment b (member), and the other segment. It is provided in b, and has a schematic configuration that is joined by a joining tool 20 that fixes the joining rod 10 when the joining rod 10 is inserted.
As shown in FIG. 1 and FIG. 2, the joining rod 10 includes an axial center portion 11, a plurality of locking portions 12 that are annularly arranged around the axial center portion 11, and the locking portions 12 as the axial center. Elastic portions 13 that are biased so as to be separated from the portions 11 in the radial direction, and each locking portion 12 has an outer diameter of a circle formed by the outer periphery of the locking portions 12 depending on the presence or absence of a compression force from the surroundings. The dimension d1 is variable between a large diameter and a small diameter.
As shown in FIG. 1, the connector 20 includes an introduction portion 21 having an inner diameter d <b> 2 that is larger than the small diameter and smaller than the large diameter, and is continuous with the introduction portion 21 and more than the introduction portion 21. And an insertion space 22 having a large inner diameter d3.
[0012]
The joining rod 10 is a resin-molded (plastic) rod body inserted into the joining tool 20, and a screw portion 14 formed on the rear end side in the insertion direction, and the screw portion 14 toward the insertion direction. The tapered portion 15 formed in a tapered shape, the shaft center portion 11 formed in a substantially columnar shape from the taper portion 15, and the members connected to the periphery of the shaft center portion 11 through the elastic portions 13. The stopper portion 12 is provided.
The joining rod 10 is fixed to the segment a so as not to be pulled out by screwing a screw portion 14 into an insert nut 16 embedded in the segment a.
[0013]
The shaft center portion 11, each locking portion 12, each elastic portion 13, the screw portion 14, and the taper portion 15 are integrally molded products by resin molding.
As shown in FIGS. 2 and 3, each elastic portion 13 curves in one direction (in the clockwise direction in the figure) around the axial center portion 11 when viewed from the front end side of the joining rod 10. In addition, there are a plurality of curved plates having the engaging portions 12 joined to the end edges thereof. Since each elastic portion 13 has such a shape, when a pressing force is applied to press the locking portion 12 against the shaft center portion 11, the elastic portion 13 is elastically deformed in the one direction. Due to the restoring force, a repulsive force that tries to push the locking portion 12 back from the shaft portion 11 can be exhibited.
[0014]
That is, as shown in FIG. 4, in the upper view in the no-load state where no external force is applied, the outer diameter dimension d <b> 1 formed by each locking portion 12 is maximized (the large diameter state), and When passing through the introduction part 21, the outer diameter dimension d1 is reduced as shown in the following figure in order to receive a compressive force from the inner wall surface of the thin introduction part 21 (the state of the small diameter). When each locking part 12 passes through the introduction part 21, it is released from the compression force, so that each locking part 12 is separated from the shaft center part 11 by the restoring force of its elastic part 13, and again The large diameter state shown in the figure is restored. Each locking portion 12 having a diameter increased in this way is locked to the introduction portion 21.
[0015]
As shown in FIGS. 1 and 3, a guide surface 12 a that is tapered in the insertion direction of the joining rod 10 is formed on the outer periphery of each locking portion 12. Similarly, a guide surface 21a (chamfering) that tapers in the insertion direction of the joining rod 10 is also formed in the opening portion (opening of the introduction portion 21) of the connector 20 that receives the guide surface 12a of the locking portion 12. Has been. These guide surfaces 12a and 21a are portions that abut first when the joining rod 10 is inserted, and these tapered shapes serve as a guide during insertion so that a smooth insertion operation can be performed.
[0016]
As shown in FIG. 1 again, the connector 20 is a bottomed cylindrical resin molded product (plastic), and is firmly embedded and fixed in the segment b. The inner shape of the joint portion 20 is formed as a cylindrical space having a constant inner diameter d2 from the opening which is the guide surface 21a in the introduction portion 21, and further expanded in a stepped manner from the end to the inner diameter d3. The insertion space 22 is continuously formed as a cylindrical space. The inner diameter d3 of the insertion space portion 22 is slightly larger than the large diameter formed by the outer diameter d1 of each locking portion 12, and each locking portion 12 within the insertion space portion 22 is used. Can be expanded sufficiently. Thereby, each latching | locking part 12 and the introducing | transducing part 21 can be latched reliably.
[0017]
The joining operation between the segments a and b by the joining structure having the above-described configuration will be described below with reference to FIG.
As shown in the figure, from the state in which the segments a and b are separated from each other, the other segment a is moved closer to the insertion portion 21 of the connector 20 of one segment b so that the joining rod 10 is inserted. (Move closer to the direction of the white arrow). Then, each locking part 12 of the joining rod 10 abuts against the introduction part 21 of the joining tool 20 and receives a compression force, and the outer diameter d1 of the circle formed by each locking part 12 is reduced from the large diameter to the small diameter. To do. When the insertion of the joining rod 10 is further advanced, each locking portion 12 passes through the introduction portion 21 and reaches the insertion space portion 22 and is released from the compression force received from the introduction portion 21. The original large diameter is restored by the elastic force. Each of the locking portions 12 thus expanded in diameter is larger than the inner diameter d2 of the introducing portion 21 and is locked to the introducing portion 21 (state shown in FIG. 1). Thereby, since the joining rod 10 is fixed to the joining tool 20 so as not to be extracted, the joining operation of the segment a to the segment b is completed.
[0018]
As described above, the joint structure of the present embodiment includes the locking portion 12 that is provided in one segment a and whose outer diameter d1 changes from the large diameter to the small diameter depending on the presence or absence of the compression force from the surroundings. It has the joining rod 10 and the joining tool 20 provided with the introducing | transducing part 21 which is provided in the other segment b and each latching part 12 of the joining rod 10 latches. The structure which joins between both segments a and b by insertion connection was employ | adopted.
According to this configuration, when joining the segments a and b, it is extremely easy by simply inserting the joining rod 10 provided in one segment a into the connector 20 provided in the other segment b. In addition, the joining rod 10 can be locked to the joining tool 20 to join the segments a and b. As a result, compared to the conventional structure in which the bolt is inserted through the hole formed in the joint surface of the joint and the nut is fastened, the labor required for the joint work can be greatly reduced, and the robot can Automatic assembly can be facilitated. In addition, it is possible to reduce the number of parts to be prepared on site at the time of joining, to reduce work of carrying in and preparing parts, and to save labor.
[0019]
Further, in the joining structure of the present embodiment, the shaft center portion 11, each locking portion 12, and the elastic portion 13 are integrally molded products by resin molding, and the elastic portion 13 is curved in one direction around the shaft center portion 11. And the structure which is the some curved board to which the latching | locking part 12 was joined to the edge was employ | adopted. According to this configuration, it is possible to obtain a reliable joint between the segments a and b while being an inexpensive configuration.
Moreover, the joining structure of this embodiment employ | adopted the structure by which the guide surfaces 12a and 21a which taper toward the insertion direction of the joining rod 10 are formed in both the latching | locking part 12 and the introduction part 21, respectively. . According to this configuration, it is possible to obtain a smooth joining operation.
[0020]
In addition, in the said embodiment and each modification, although the case where the junction structure of this invention was applied to the junction structure of the segments a and b which comprise a tunnel was demonstrated, it is not limited to this, Other members Of course, it may be applied to bonding between the two.
In the above embodiment, the guide surfaces 12a and 21a are formed on both the locking portion 12 and the introduction portion 21. However, the present invention is not limited to this, and the guide surfaces 12a and 21a may be formed on only one of them.
[0021]
【The invention's effect】
Joint structure according to claim 1 of the present invention, a joining rod having an engagement portion having an outer diameter is variable to have a larger diameter and the smaller diameter by the presence or absence of a compressive force from the surrounding provided on one segment, while of the engaging portions of the joint rods are provided on the segments and a bonding tool having a inlet section for locking, the configuration in which the junction between the two segments by the insertion connection of the junction rods to these connectors Adopted.
According to this configuration, when bonding the segments together, simply by inserting the joined rods provided on one of the segments to the other connectors provided in the segment, very easily, the bonding bar connectors And the segments can be joined to each other. As a result, compared to the conventional structure in which the bolt is inserted through the hole formed in the joint surface of the joint and the nut is fastened, the labor required for the joint work can be greatly reduced, and the robot can Automatic assembly can be facilitated. Moreover, a smooth joining operation can be obtained. In addition , it is possible to reduce the number of parts to be prepared on site at the time of joining, to reduce the work of carrying in and preparing parts, and to save labor.
[0022]
The joint structure according to claim 2, wherein, in the joint structure according to claim 1, wherein an elastic portion consisting of the axis portion and the locking portion and the curved plate adopts the configuration is integral formed molded article by resin molding.
According to this configuration, it is possible to obtain a reliable joint between segments while being an inexpensive configuration.
[Brief description of the drawings]
FIG. 1 is a view showing an embodiment of a joining structure of the present invention, and is a cross-sectional view in a joined state.
FIG. 2 is a view showing the joint structure, and is a cross-sectional view taken along line AA of FIG.
FIG. 3 is a view showing a main part of the joint structure, and is an enlarged view of a part B in FIG. 2;
FIG. 4 is a view showing the operation of each locking portion and each elastic portion of the joint structure when viewed from the front end side of the joint rod.
FIG. 5 is a diagram showing the joint structure, and is a cross-sectional view of a state before joining.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Joining rod 11 ... Axial center part 12 ... Locking part 12a, 21a ... Guide surface 13 ... Elastic part 20 ... Joiner 21 ... Introducing part 22 ... Insertion space part a, b ... Segment (member)

Claims (2)

Segments together, a joint structure for joining the abutted joint surfaces with each other, whereas the junction rods extending toward the segment on the other side be provided on the side of the segment, said the other side segment joined when the joining rod have been provided, et al has been inserted by the bonding tool to fix said bonding bar will have,
The joining rod includes an axial center part, a plurality of engaging parts annularly arranged around the axial center part and spaced radially outward, and connecting the engaging parts to the axial part respectively, and A plurality of elastic parts that are curved in one direction around the axial center part when viewed from the front end side of the joining rod and are elastically deformable on the axial center side ;
Each of the locking portions is variable in the outer diameter of a circle formed by the outer periphery of the locking portions to a large diameter and a small diameter depending on the presence or absence of a pressing force from the surroundings.
The connector includes an introduction portion having an inner diameter dimension larger than the small diameter and smaller than the large diameter, and an insertion space portion having an inner diameter dimension continuous to the introduction portion and larger than the introduction portion ,
A joining structure characterized in that a guide surface that tapers in the insertion direction of the joining rod is formed on either one or both of the locking portions and the introduction portion . The joining structure according to claim 1,
Elastic portion consisting of the axis portion and the locking portion and the curved plate, the bonding structure, which is a single piece by resin molding.

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