JP2002206396A - Junction structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a junction structure capable of stably connecting two members with good workability. SOLUTION: This junction structure is provided with a junction bar 1 provided in a first segment Sa and a junction tool 2 provided in a second segment Sb to hold the junction bar 1. The junction tool 2 is provided with an inserted member 5 having a passage 4 through which the junction bar 1 can be inserted. The passage 4 is provided with a first passage 4a formed on the side of the first segment Sa and a second passage 4b larger in diameter than the first passage 4a. A holding member 7, which has an enclosing section holding the junction bar 1 by enclosing its front end section in the insertion direction, is arranged in the second passage 4b. The holding member 7 is formed larger in diameter than the first passage 4a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining structure for joining two members to each other.

[0002]

2. Description of the Related Art For example, when constructing a cylindrical tunnel wall, segments are generally joined together by bolts. As a structure for joining the segments with the bolts, a joint having holes communicating with each other when the joining surfaces of the segments are brought into contact with each other is embedded near the joining surface of the segments, and the holes of these joints are joined together. In general, a structure is used in which a bolt is inserted into a hole and a nut is fastened to the bolt in a state where the joint surfaces of the segments are in contact with each other so that the segments communicate with each other. Further, there is also a structure in which an insert fitting as a nut member is embedded in each segment, and a penetrating bolt is fastened to an adjacent segment to be joined to each other.

[0003]

However, in the structure described above, an extremely complicated operation of inserting a bolt into a hole formed in a joint surface of a joint at a construction site and fastening a nut to the bolt is required. There was a problem that required. In addition, in the joint structure as described above, it is necessary to accurately connect the holes of the joint with each other to install the segments.

The present invention has been made in view of such circumstances, and has as its object to provide a joint structure that can stably join two members such as segments with good workability. .

[0005]

In order to solve the above-mentioned problems, a joint structure according to the present invention is a joint structure for joining a first member and a second member, wherein the first member is attached to the first member. A connecting rod provided to extend toward the second member;
A connector provided on the second member and holding the connecting rod by inserting the connecting rod, wherein the connector includes an inserted member having a passage through which the connecting rod can be inserted. The passage has a first passage formed on the first member side and a larger diameter than the first passage, and is formed on the second member side so as to be continuous with the first passage. A holding member having an inner packet portion for holding the insertion rod by inserting the front end portion in the insertion direction of the connecting rod, wherein the holding member is disposed in the second channel. Among the members, the size in the passage radial direction is formed larger than the first passage.

According to the present invention, when the connecting rod is inserted into the passage formed in the inserted member of the connecting tool, the front end of the connecting rod passing through the first passage is held in the second passage. It is held in the inner packet part of the member. At this time, the second passage is formed to have a larger diameter than the first passage, and
Since the holding member arranged in the passage is formed to have a larger size in the radial direction than the first passage, even if a force is applied to the joining rod in the pull-out direction, the holding member is connected to the first passage and the first passage. Since the locking rod is locked at the boundary between the two passages, the connecting rod is not pulled out of the connecting tool. Therefore, the first member and the second member are stably joined. Further, since the first member and the second member can be joined simply by inserting the joining rod into the joining tool, the joining operation can be performed with good workability.

In the second passage, at the end of the second member on the side of the second member, there is provided a stopper for restricting the movement of the holding member toward the second member. Can be stably performed when the front end portion is disposed.

The holding member is provided so as to be elastically deformable, and the diameter of at least a part of the inner packet portion is formed to be smaller than the front end portion of the joining rod. When performing the pushing operation to place it in the part,
Since the inner packet part is expanded by the elastic deformation of the holding member,
The front end of the joining rod can be stably included. Then, the holding member in which the front end of the joining rod is included in the inner packet portion is configured to tighten the front end of the joining rod at a portion of the inner packet portion having a smaller diameter than the front end of the joining rod based on elastic deformation. Hold.

[0009] The holding member has a protruding portion protruding toward the inside of the inner packet portion. When the front end portion is disposed on the inner packet portion, the connecting rod is moved backward in the insertion direction by the protruding portion. Since the locking portion is regulated, the connecting rod is not pulled out by the locking portion even if a force in the pulling direction acts on the connecting rod. Therefore, the joining between the first member and the second member is stable.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a joint structure according to the present invention will be described with reference to the drawings. 1, 2 and 3 are side sectional views showing a first embodiment of the joining structure of the present invention, and show a series of joining operations.

In FIG. 1, a joining structure joins a first segment (first member) Sa and a second segment (second member) Sb constituting a tunnel wall body, and includes a first segment. The joining rod 1 provided in Sa and the second
And a connector 2 provided on the segment Sb.
The joining rod 1 is provided so as to extend toward the second segment Sb, and is inserted into the joining tool 2 in the arrow y direction in FIG. A threaded portion 1a is formed on the rear end side of the joining rod 1 in the insertion direction. And the first segment S
The joining rod 1 and the first segment Sa are fixed by screwing the insert nut 1b and the threaded portion 1a embedded in a. On the other hand, a locking portion 1d having a larger diameter than the shaft portion 1c is formed on the front end side of the joining rod 1 in the insertion direction. The joining rod 1 is made of various synthetic resins such as polycarbonate and polystyrene, or various metals such as steel.

The connecting member 2 is embedded in the second segment Sb and has an inserted member 5 having a passage 4 through which the connecting rod 1 can be inserted.
It has. At the end of the passage 4 on the second segment Sb side, a lid (stopper portion) 6 that closes the passage 4 is provided. The member to be inserted 5 and the lid 6 that constitute the joining tool 2 are also made of various synthetic resins such as polycarbonate and polystyrene, or various metals such as steel.

The passage 4 formed in the inserted member 5 is
First passage 4a formed on the first segment Sa side
And a second passage 4b formed on the second segment Sb side so as to be continuous with the first passage 4a. The first passage 4a is a straight passage having a diameter large enough to allow the joining rod 1 to pass therethrough. The second passage 4b is connected to the first passage
It is a tapered passage that is continuous from the passage 4a and expands toward the second segment Sb. The diameter of the second passage 4b is larger than that of the first passage 4a. Here, of the entire passage 4, at least a boundary 4c between the first passage 4a and the second passage 4b is formed so as to have a minimum diameter.

In the second passage 4b, there is disposed a holding member 7 which can pass through the first passage 4a and hold the front end of the joining rod 1 inserted in the second passage 4b in the insertion direction. As shown in FIG. 4, the holding member 7 is made of horseshoe-shaped spring steel, and has an inner packet portion 8 that can include the front end of the joining rod 1 inserted into the second passage 4b. . At two ends of the holding member 7, key-shaped protrusions 9a and 9b are formed so as to protrude toward the inner packet part 8 side.

[0015] Holding member 7 made of spring steel
Is provided so as to be elastically deformable. That is, in FIG.
As shown by the arrow r, it is elastically deformable in the passage radial direction, and its two ends (projections) 9a and 9b are also provided so as to be elastically deformable in the passage axis direction (see the arrow p). Here, the size W in the passage radial direction of the holding member 7 in a state where no external force is applied (normal state).
(See FIG. 4) is set to be larger than the diameter of the second passage 4b. Therefore, when the holding member 7 is disposed in the second passage 4b, the holding member 7 is elastically deformed inward in the r direction, and thus has a biasing force directed outward.

As shown in FIG. 1, in the holding member 7 arranged in the second passage 4b, the size (almost W) of the holding member 7 in the passage radial direction (the direction orthogonal to the insertion direction of the joining rod 1).
Is larger than the diameter of the first passage 4a.
The holding member 7 arranged in the passage 4b is not moved to the first passage 4a side. The distance (diameter) between the protrusion 9a and the protrusion 9b is determined by the locking portion 1d formed at the front end of the joining rod 1.
It is set to be smaller than the diameter of. That is,
The diameter formed by the protruding portions 9a and 9b, which are a part of the inner packet portion 8 of the holding member 7 disposed in the second passage 4b, is set smaller than the engaging portion 1d of the joining rod 1.

A procedure for joining the first segment Sa and the second segment Sb by the joining structure having the above-described configuration will be described. First, as shown in FIG. 1, the screw 1a of the joint rod 1 and an insert nut 1b embedded in the first segment Sa are screwed to fix the joint rod 1 to the first segment Sa. In addition, the holding member 7 is connected to the second segment Sb and the second passage 4b.
Is inserted together with the lid 6.

When the holding member 7 is arranged in the second passage 4b, the holding member 7 is formed to have a diameter larger than the diameter of the second passage 4b. Deploy. Thereby, the elastically deformable holding member 7 arranged in the second passage 4b has an urging force directed outward. When the holding member 7 is disposed in the second passage 4b, the holding member 7 has a larger diameter than the first passage 4a, so that the holding member 7 is prevented from moving toward the first passage 4a together with the action of the outward urging force. It is stable and positioned.

After the connector 2 is provided in the second segment Sb, the connecting rod 1 is inserted toward the passage 4 in the direction of arrow y. The front end of the joining rod 1 that has passed through the first passage 4a
It is inserted into the passage 4b and contacts the ends 9a and 9b of the holding member 7, as shown in FIG. At this time, the end 9a and the end 9
The distance (diameter) to b is the front end of the joining rod 1 (locking portion 1d)
Smaller than the diameter of

Then, as shown in FIG. 2, when the joining rod 1 is further pushed into the second segment Sb, the ends 9a and 9b of the holding member 7 are elastically deformed toward the front in the insertion direction (see arrow p in FIG. 4). I do. At this time, the end portions 9a, 9b of the holding member 7
Is deformed so as to slide toward the second segment Sb while being guided by the tapered shape of the second passage 4b, so that the end portions 9a and 9b are separated from each other. By separating the end 9a and the end 9b, the front end of the joining rod 1 becomes the end 9a,
9b and can be inserted into the inner packet part 8 of the holding member 7. Note that the front end of the joining rod 1 is
When each of the protruding portions (end portions) 9a and 9b is inserted into the groove, the protruding portions (end portions) 9a and 9b are formed in a key shape so as to face forward in the insertion direction as shown in FIG.

As shown in FIG. 3, the front end of the joining rod 1 is disposed in the inner packet part 8 of the holding member 7, and the large-diameter locking part 1d has ends (projections) 9a, 9b. , The ends 9a and 9b elastically deformed to slide toward the second segment Sb are deformed to return to the first segment Sa by a restoring force,
The locking portion 1d is engaged with the ends (projections) 9a and 9b.
The engagement of the locking portion 1d and the protruding portions 9a and 9b restricts the movement of the joining rod 1 to the rear side in the insertion direction.

The holding member 7 arranged in the second passage 4b
Has an outward biasing force, and this biasing force and the lid 6
Thus, the positioning with respect to the inserted member 5 is stably performed. Since the diameter of at least a part of the inner packet part 8 including the protruding parts 9a and 9b is formed smaller than the front end of the joining rod 1 to be included, the holding member 7 is formed.
Hold and fix the front end of the joining rod 1 so as to be tightened. Thus, the joining rod 1 and the joining tool 2 including the inserted member 5 are fixed.

As described above, when the joining rod 1 is inserted into the passage 4 formed in the inserted member 5 of the joining tool 2, the front end of the joining rod 1 that has passed through the first passage 4a becomes the second end.
It is held by the inner packet part 8 of the holding member 7 arranged in the passage 4b. At this time, the second passage 4b is formed to have a larger diameter than the first passage 4a, and the holding member 7 arranged in the second passage 4b has a radial size larger than that of the first passage 4a. Therefore, even if a force is applied to the joining rod 1 in the pulling-out direction, the holding member 7 can be connected to the first passage 4.
Therefore, the connecting rod 1 is not pulled out of the connecting tool 2 because the connecting rod 1 is locked at the boundary 4c between the second connecting passage 4a and the second passage 4b. Therefore, the first segment Sa and the second segment Sb are stably joined. Further, since the first segment Sa and the second segment Sb can be joined simply by inserting the joining rod 1 into the joining tool 2, the joining operation can be performed with good workability.

The holding member 7 is provided so as to be elastically deformable. When the holding member 7 is disposed in the second passage 4b, the diameter of at least a part of the inner packet portion 8 such as the projecting portions 9a and 9b is larger than that of the front end of the joining rod 1. Because of the small diameter, when the pushing operation is performed to arrange the front end of the joining rod 1 in the inner packet part 8, the inner packet part 8 is expanded by the elastic deformation of the holding member 7. Can be stably included. The holding member 7 in which the front end portion of the joining rod 1 is included in the inner packet portion 8 has a smaller diameter than the front end portion of the joining rod 1 including the protruding portions 9a and 9b of the inner packet portion 8 based on the elastic deformation. Can be held so that the front end of the joining rod 1 is tightened.

The elastically deformable holding member 7 is formed larger than the diameter of the second passage 4b in a state where no force is applied from the outside, and is directed outward by being arranged in the second passage 4b. Has biasing force. Therefore, since the holding member 7 is stably positioned in the second passage 4b, the insertion operation of the joining rod 1 can be stabilized.

Since the lid 6 as a stopper for restricting the movement of the holding member 7 toward the second segment Sb is provided at the end of the second passage 4b on the side of the second segment Sb.
The holding member 7 is stably positioned. Therefore, the pushing operation when the front end of the joining rod 1 is arranged in the inner packet part 8 of the holding member 7 can be stably performed. Even if the lid 6 is not provided, the holding member 7 is stably positioned by directly abutting the holding member 7 on the second segment Sb.

The holding member 7 has protrusions 9a and 9b protruding toward the inside of the inner packet part 8, and the front end of the joining rod 1 has a locking portion 1d having a large diameter. Is disposed on the inner packet part 8, the protrusions 9 a and 9 b restrict the backward movement in the insertion direction. Therefore, even when a force in the pull-out direction acts on the joining rod 1, the joining rod 1 is not
Not pulled out by d. Therefore, the joining between the first segment Sa and the second segment Sb is stable.

Next, a second embodiment of the joint structure of the present invention will be described with reference to FIGS. 5, 6, 7 and 8. Here, in the following description, the same reference numerals are used for the same or equivalent components as those of the above-described first embodiment, and the description thereof will be simplified or omitted.

In FIG. 5, the joining structure includes a joining rod 1 provided on the first segment Sa and a joining tool 2 provided on the second segment Sb. The joining rod 1 in the present embodiment does not have a large diameter portion on the front end side in the insertion direction, and has a straight rod shape having a substantially uniform thickness.

The joining member 2 is embedded in the second segment Sb and has an inserted member 5 having a passage 4 through which the joining rod 1 can be inserted.
A lid 6 that closes the passage 4 is provided at an end of the passage 4 on the second segment Sb side. Passage 4
As in the first embodiment, a straight first passage 4a and a tapered second passage 4b expanding toward the second segment Sb are provided.
It consists of

A holding member 7 capable of holding the front end of the joining rod 1 in the insertion direction is disposed in the second passage 4b. As shown in FIG. 8, the holding member 7 has a substantially cylindrical shape (gourd shape).
And has a constriction 10 at one location, and has an inner packet part 8 capable of enclosing the front end of the joining rod 1 therein. At this time, the inner diameter of the constricted portion 10 is formed smaller than the front end of the joining rod 1.

The holding member 7 in the present embodiment is
At a plurality of locations (four locations), there are notched slit portions 11 which are largely cut in the axial direction of the holding member 7. The holding member 7 divided by the slit 11 is elastically deformable. Similarly to the first embodiment, the large diameter portion 7a of the holding member 7 is set to have a larger diameter than the second passage 4b in a normal state (a state where no force is applied from outside). 2 passage 4
b, the holding member 7 has a biasing force toward the outside. And the second passage 4
The large-diameter portion 7a of the holding member 7 when arranged at the position b is set to be larger in diameter than the first passage 4a.

A procedure for joining the first segment Sa and the second segment Sb by the joining structure having the above-described structure will be described. First, as shown in FIG. 5, the joint rod 1 is fixed to the first segment Sa by screwing the thread portion 1a of the joint rod 1 and the insert nut 1b embedded in the first segment Sa. In addition, the holding member 7 is connected to the second segment Sb and the second passage 4b.
Is inserted together with the lid 6.

When the holding member 7 is arranged in the second passage 4b, since the holding member 7 is formed to have a diameter larger than the diameter of the second passage 4b, the holding member 7 is arranged so as to be crushed. Thereby, the elastically deformable holding member 7 arranged in the second passage 4b has an urging force directed outward. When the holding member 7 is disposed in the second passage 4b,
Since the diameter is larger than that of the first passage 4a, it is prevented from being moved toward the first passage 4a together with the action of the urging force toward the outside, and is positioned stably.

After the connector 2 is provided in the second segment Sb, the connecting rod 1 is inserted toward the passage 4 in the direction of arrow y. The front end of the joining rod 1 that has passed through the first passage 4a
It is inserted into the inner packet part 8 of the holding member 7 arranged in the passage 4b.

As shown in FIG. 6, a part of the inner packet part 8 includes
A constricted portion 10 having a smaller diameter than the front end of the joining rod 1 is provided, and by further pushing the joining rod 1 toward the second segment Sb, the holding member 7 elastically expands the constricted portion 10. Deform. The neck portion 10 is expanded in diameter by the elastic deformation of the holding member 7, so that the front end of the joining rod 1 is inserted into the inner packet portion 8. In this case, since the end 9 of the holding member 7 is formed to be larger than the diameter of the joining rod 1, the insertion operation is not hindered.

Then, as shown in FIG. 7, the front end of the joining rod 1 is arranged in the inner packet 8 of the holding member 7, so that
A constricted portion 10 having a smaller diameter than the joining rod 1 holds and fixes the front end of the joining rod 1 so as to be tightened. Thus, the joining rod 1 and the joining tool 2 including the inserted member 5 are fixed.

As described above, since the inner packet part 8 formed on the elastically deformable holding member 7 is provided with the constricted part 10 formed to have a smaller diameter than the front end of the joining rod 1, the constricted part 10 is formed. Thus, the front end of the joining rod 1 can be clamped and held.

In the present embodiment, it is of course possible to form the end 9 of the holding member 7 as small as possible so that the joining rod 1 can be tightened. By providing a resistance portion such as a knurled groove on the inner surface near the end portion 9 or the inner surface of the constricted portion 10, even when a force is applied to the joining rod 1 in the pulling direction, the resistance to the pulling direction force is applied. Can be secured.

In the present embodiment, the constricted portion 10 forming a smaller diameter portion than the joining rod 1 is formed at only one place, but it is also possible to provide this constricted part 10 at a plurality of places. On the other hand, it is also possible to hold the joining rod 1 only at the end 9 without providing the constriction 10. That is,
In the elastically deformable holding member 7, a portion smaller in diameter than the joining rod 1 may be formed in at least one place.

The joining structure in each of the above embodiments joins the segments Sa and Sb constituting the tunnel, but is not limited to the segment of the tunnel and can be applied to joining any members. Of course there is.

[0042]

According to the joining structure of the present invention, when the joining rod is inserted into the passage formed in the inserted member of the joining tool, the front end of the joining rod passing through the first passage is connected to the second passage. It is held by the inner packet part of the holding member arranged. At this time, the second passage is formed to have a larger diameter than the first passage, and the holding member arranged in the second passage is formed to have a larger radial size than the first passage. Since the holding member is locked at the boundary between the first passage and the second passage even when a force in the pulling direction acts on the joining rod,
The connecting rod is not pulled out of the connector. Therefore, the first
And the second member are stably joined. Further, since the first member and the second member can be joined simply by inserting the joining rod into the joining tool, the joining operation can be performed with good workability.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of a joining structure of the present invention, showing a state before a first member and a second member are joined.

FIG. 2 is a cross-sectional view showing the first embodiment of the joining structure of the present invention, showing a state immediately before the front end of the joining rod is held by a holding member.

FIG. 3 is a cross-sectional view showing the first embodiment of the joining structure of the present invention, showing a state after the first member and the second member are joined.

FIG. 4 is a view showing a holding member according to a first embodiment of the joining structure of the present invention.

FIG. 5 is a cross-sectional view showing a second embodiment of the joining structure of the present invention, showing a state before the first member and the second member are joined.

FIG. 6 is a cross-sectional view showing a second embodiment of the joining structure of the present invention, showing a state immediately before a front end of a joining rod is held by a holding member.

FIG. 7 is a cross-sectional view showing a second embodiment of the joining structure of the present invention, showing a state after the first member and the second member are joined.

FIG. 8 is a view showing a holding member according to a second embodiment of the joining structure of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Joining rod 1d Locking part 2 Connector 4 Passage 4a 1st passage 4b 2nd passage 5 Inserted member 6 Lid (stopper part) 7 Holding member 8 Inner packet part 9 End part 9a, 9b End part (projection part) 10 Constricted portion (small diameter portion) 11 Slit portion Sa First segment (first member) Sb Second segment (second member)

Claims (4)

[Claims] 1. A joining structure for joining a first member and a second member, wherein: a joining rod provided on the first member so as to extend toward the second member; And a connector for holding the connecting rod by inserting the connecting rod, wherein the connecting tool includes an inserted member having a passage through which the connecting rod can be inserted, A first passage formed on the first member side, and a first passage formed on the second member side so as to be larger in diameter than the first passage and connected to the first passage. A holding member having an inner portion for holding the insertion rod by inserting the front end portion in the insertion direction of the connecting rod into which the passage is inserted, and a holding member is disposed in the second passage. The size in the passage radial direction is the first
A joining structure characterized by being formed larger than the passage. 2. The joining structure according to claim 1, wherein a stopper is provided at an end of the second passage on the side of the second member to restrict movement of the holding member toward the second member. A joining structure comprising: 3. The joining structure according to claim 1, wherein the holding member is provided so as to be elastically deformable, and a diameter of at least a part of the inner packet part is smaller than a front end of the joining rod. A joining structure characterized by being formed. 4. The joining structure according to claim 1, wherein the holding member includes a protruding portion protruding toward the inside of the inner packet portion, and the joining rod has a front end portion at the inner packet portion. A connection portion having a locking portion that is restricted from moving backward in the insertion direction by the protruding portion when disposed in the connecting portion.