JP2009035929A - Joint structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate assembly and reduce manufacturing cost by simplifying shapes of a male joint and a female joint. <P>SOLUTION: The male joint 3 and the female joint 4 of a segment are interlocked and joined each other. The male joint 3 has a joint rod 9 provided with an interlocking recess 12 on a base end side of a head part 13 arranged on the front end side. The female joint 4 has a cutout part 18 in an outer peripheral surface facing a housing 16. A rectangular and flat plate-like interlocking member 20 is arranged in the cutout part 18 to be movable back and forth. The interlocking member 20 is biased by a plate spring in the direction of being pressed into the cutout part 18. When the joint rod 9 is inserted into the housing 16, it moves beyond the interlocking member 20 by moving it toward the outside of the cutout part 18 with the head part 13 against the biasing force of the plate spring, and the interlocking member 20 is interlocked with the interlocking recess 12. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a joint structure for joining members such as segments that construct a tunnel or the like.

Conventionally, as a joint structure for joining segments constructing a tunnel or the like, for example, there are those described in Patent Documents 1 to 3 below. In the joint structure described in Patent Document 1, as a female joint provided on the joint surface of one segment, a clip-shaped female part having a distal end portion that is openable and closable in a holding fitting having a substantially U-shaped cross section. In the opening of the female part, a spacer that secures a gap is fitted so as to easily receive the male part of the male joint.
At the time of fastening the joint, the male part having an enlarged head is inserted into the opening of the female part to push out the spacer and fit into the female part, and the enlarged head of the male part is fastened at the opening. It is trying to fix with.
Further, in the joint structure disclosed in Patent Document 2, a rectangular tubular locking member provided in the housing of the female member has a groove for engaging and holding the joining rod of the male member on the inside, and the locking member Is divided into 2 to 4 pieces. These divided locking members are urged in a direction in which they are joined and reduced in diameter by a leaf spring provided between them. When joining the segments, if the enlarged head of the joining rod is pushed into the groove of the female member, the locking member is pushed outward against the urging force of the leaf spring to allow the joining rod to enter. Thereafter, the plurality of locking members are reduced in diameter by the urging force of the leaf springs to lock the joining rods. As a result, the male member and the female member are joined.

In the joint structure described in Patent Document 3, the joint rod of the male joint fitting has a tip tapered portion and a constricted portion. The female joint fitting has a holding space whose diameter is expanded on the joint surface side of the cylindrical housing, and a pair of substantially crescent-shaped locking members are arranged in the holding space so as to face each other. The locking members are biased in the direction of joining to each other by the plate spring.
Then, by inserting the joining rod of the male joint fitting into the holding space of the female joint fitting, the locking member is expanded in diameter against the urging force of the leaf spring, and when the tip tapered portion passes, the locking member is The female joint fitting and the male joint fitting are joined by reducing the diameter by the urging force of the leaf spring and engaging with the constricted portion.
Japanese Patent No. 3351767 JP-A-9-88490 JP 2001-90485 A

By the way, the joint joints described in Patent Documents 1 to 3 as described above have a drawback in that the shape of the locking member of the female joint is complicated, and it takes time and effort to process and assemble, resulting in an increase in manufacturing cost. It was.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a joint structure in which the shape of the parts of the female joint is simple and easy to assemble.

A joint structure according to the present invention is a joint structure in which a male joint and a female joint are engaged with each other so that a member having a male joint and a member having a female joint are joined to each other. A male joint main body provided with an engagement recess on the proximal end side of the head provided on the head, and the female joint is provided opposite to the housing into which the male joint main body is inserted or the housing or the housing. A member having a notch portion at a position, a rectangular flat plate-shaped engaging member that can be moved forward and backward in the notch portion and engageable with an engaging recess of the male joint body, and the engaging member in the notch portion And a biasing member that biases in the pressing direction. When the male joint body is inserted into the female joint housing, the head of the male joint body resists the biasing force of the biasing member. To move away from each other and get over the engagement recess to engage the engagement member Characterized in that it was.
According to the joint structure of the present invention, a rectangular flat plate-like engagement member is provided in the housing as a female joint that fits into the male joint, so the male joint body is inserted into the housing, When the head of the male joint body gets over the engagement member while being separated from each other against the urging force of the urging member, the engagement member is placed in the engagement recess provided on the base end side of the head. It can be engaged by a biasing force. The engaging member is simple in shape and easy to manufacture, and can be manufactured at low cost.

Further, the member having the notch portion may be an outer peripheral surface of the housing that faces each other.
By forming the notch portion facing the outer peripheral surface of the housing, the structure is simpler and the number of parts can be reduced, and the manufacturing cost can be further reduced.
Further, the outside of the housing may be covered with a cover member, and even when the outer peripheral surface of the housing is cut out to form a cutout portion, concrete or the like does not enter the interior during the manufacture of members such as segments.

In addition, the member having the notch portion may be an engagement plate formed by bending a flat plate into a substantially U-shape and having a pair of notch portions formed at opposite flat plate end portions.
Since both the engaging member of the joint structure and the engaging plate having a notch for receiving the engaging member can be formed of a flat plate, the manufacturing can be further facilitated.
Further, the member having the notch portion may be a pair of opposing flat plate-like engagement plates that are fixed to the main beam plate and provided with the notch portion.
Even in this case, since both the engaging member and the engaging plate having the notch can be formed of a flat plate, the manufacturing can be further facilitated.
Further, in the male joint body, the wall surface that partitions the head and the engagement recess may be inclined at an acute angle toward the engagement recess.
In a state where the engagement member is accommodated in the engagement recess, the wall surface that partitions the head and the engagement recess is inclined toward the engagement recess, so that the engagement member is difficult to move in a direction away from the engagement recess. Difficult to leave.

  In the joint structure according to the present invention, the female member includes a rectangular flat plate-like engaging member and a biasing member that are housed in the notch portion of the member having the notch portion with respect to the male joint having the engaging recess. Therefore, there is an advantage that the shape of the engaging member is simple and easy to assemble, and the manufacturing cost is lower than that of the conventional joint structure of this type.

Embodiments of the present invention will be described below with reference to the drawings.
1 to 4 show a joint structure according to a first embodiment of the present invention. FIG. 1 is an explanatory view showing a male joint and a female joint in a separated state in partial cross section. FIG. 2 is a partially enlarged view of the male joint. FIG. 3 is a side view of the female joint in a direction orthogonal to that in FIG. 1, and FIG. 4 is a cross-sectional view taken along line AA of the female joint shown in FIG. It is explanatory drawing.
The joint structure according to the present embodiment relates to a joint structure of an inter-ring joint for joining segment rings in the axial direction of a tunnel, for example.
As shown in FIG. 1, the male joint 3 is provided on the main girder plate 6 which is the joint surface of one segment 1A, and the female joint 4 is provided on the main girder plate 14 of the other segment 1B.

In FIG. 1, a segment 1A having a male joint 3 has a hole 7 in one main girder plate 6 and a cap nut 8 fixed to the back side thereof. The joining rod 9 forming the male joint body is substantially cylindrical, and a male threaded portion 10 that is screwed into the cap nut 8 is formed at the rear end of the jointing rod 9. It has a substantially rod shape formed sequentially. The joining rod 9 is fixed in a state in which it protrudes from the main girder plate 6 by screwing the male screw portion 10 into the cap nut 8 on the back surface of the main girder plate 6.
The head 13 of the joining rod 9 shown in FIG. 2 is formed with a tapered portion 13a having a tapered shape on the distal end side, and the proximal end side has a small angle from the direction perpendicular to the central axis O of the joining rod 9, for example, about 5 The wall surface 13 b is inclined to the base end side and connected to the inclined recess 12. The distal end surface of the base 11 forms a tapered surface toward the engagement recess 12.

Next, in the female joint 4, the segment 1 </ b> B having the female joint 4 has a hole 15 in the main girder plate 14, and a rectangular tube-shaped housing 16 is fixed to the back side thereof by welding or the like. A substrate 17 is fixed to the base end side. As shown in FIGS. 1, 3, and 4, a pair of notches 18, 18 are formed to face each other on outer peripheral surfaces 16 a, 16 a that are slightly separated from the main girder plate 14 of the housing 16 in the longitudinal direction. The distance between the notches 18 and 18 is set to a dimension that is equal to or larger than the diameter of the engaging recess 12 of the joining rod 9 and smaller than the outer diameter of the head 13, for example.
Each notch 18 provided in the housing 16 has an outer peripheral surface 16a cut out so as to form a substantially rectangular shape when viewed from the front shown in FIG. 1, and the notch 18 has a rectangular flat plate, for example, a rectangular flat plate engaging member. 20 is installed. As shown in FIG. 3, the engaging member 20 is pressed by a leaf spring 21 which is a biasing member having one end fixed to the inner surface proximal end side of the outer peripheral surface 16 a of the housing 16.
The leaf spring 21 has, for example, a strip shape, and inclines in the direction of the central axis O from the fixed proximal end side toward the distal end side, and presses the engagement member 20 at the distal end bending portion. As a result, the engaging member 20 can move forward and backward in the direction of the central axis O of the housing 20 in the notch 18 and is held by being urged radially inward by the leaf spring 21.

Then, when the joining rod 9 is inserted into the housing 16, the head 13 pushes over the pair of engaging members 20, 20 pressed into the notches 18, 18, and gets over the both sides of the engaging recess 12. The engaging members 20, 20 are held in an engaged state by being pressed by the urging force of the leaf springs 21, 21.
The notches 18 and 18 are set to such a depth that the engaging members 20 and 20 are not detached from the notches 18 when the head 13 of the joining rod 9 passes.
A cylindrical cover member 23 is disposed substantially coaxially on the outside of the housing 16, and both ends thereof are fixed to the main girder plate 14 and the substrate 17 by welding or the like. A nut 24 is fixed to the base 17 on the center axis O in the housing 16, and the nut 24 is screwed onto a bolt protruding from the mold when the female member 4 is fixed to a segment mold (not shown). In this way, positioning and fixing are performed, and concrete or the like is filled. In that case, since the cover member 23 is provided outside the housing 16, the concrete does not enter the housing 16.

The joint structure according to the present embodiment has the above-described configuration, and in order to manufacture the segment 1B, the housing 16 and the cover member 23 are coaxially welded and fixed to the substrate 17 in advance, and a flat plate is formed in each notch 18. The engaging member 20 is installed and pressed by the leaf spring 21. Then, the housing 16 and the cover member 23 are brought into contact with each other through a main girder plate 2B in a mold (not shown), and a bolt (not shown) inserted into the mold is screwed into a nut 24 fixed to the substrate 17. Then, the female joint 4 is fixed to the mold.
In this state, concrete is filled into the mold and cured, thereby producing the segment 1B.

Next, a method for joining the segments 1A and 1B according to the present embodiment will be described.
In FIG. 1, the main girders 6 and 14 of the segments 1 </ b> A and 1 </ b> B are opposed to each other, and the male joint 3 is pressed into the female joint 4 while being held substantially coaxially. In the joining rod 9 of the male joint 3, the taper portion 13 a of the head 13 abuts on the engaging members 20, 20 installed in the notches 18, 18 in the female joint 4, and these engaging members 20, 20. Is pushed out to the outside of the notches 18 and 18 against the urging force of the leaf springs 21 and 21 to get over.
When the head 13 of the joining rod 9 gets over the engaging members 20, 20, the urging force of the leaf springs 21, 21 until the engaging members 20, 20 come into contact with the engaging recess 12 in the notches 18, 18. Pushed by. Thereby, the joining rod 9 is held in the engaged state in the female joint 4, and the segment 1 A and the segment 1 B are joined by the male joint 3 and the female joint 4.
In addition, the direction in which the joining rod 9 is pulled out in a state where the pair of engaging members 20, 20 in the notches 18, 18 are pressed against and engaged with the engaging recess 12 so as to sandwich the engaging recess 12 of the joining rod 9. Even if a force is applied to the contact, the engaged state can be maintained. In particular, in this embodiment, the engaging recess 12 of the joining rod 9 and the side wall 13b of the head 13 are set at an acute angle slightly smaller than 90 °, so that the engaging members 20, 20 are detached from the engaging recess 12. Movement in the direction is suppressed, and separation can be prevented to ensure a reliable engagement state.

  As described above, according to the joint structure according to the present embodiment, the engaging members 20 and 20 in the female joint 4 are formed of a rectangular and flat plate material such as flat steel, and the notch 18 that accommodates the engaging member 20. Further, the structure is merely a structure in which the outer peripheral surface 16a which is the opposite side surface of the rectangular tube-shaped housing 16 is cut out, and the male joint 3 has a simple column shape and is formed in a simple shape with the engaging recess 12 formed in the middle portion. Compared with the conventional joint structure, the engagement member 20 and the notch 18 and the leaf spring 21 for holding the engagement member 20 can be configured in a simple manner, can be manufactured easily with less processing, and the manufacturing cost can be reduced. .

Next, another embodiment of the present invention will be described. The same reference numerals are used for the same or similar members and parts as those in the first embodiment described above.
5 and 6 show the joint structure according to the second embodiment of the present invention. The male joint 3 is the same as that of the first embodiment, and the housing 16 of the female joint 4 is different. This will be described.
5 and 6, the housing 16 has a substantially rectangular tube shape as a whole, and a rectangular tube main body 26 and a rectangular tube head portion 27 are separately formed. The square tube main body 26 and the square tube head 27 are held in a slightly separated state, and side plates 28 and 28 having notches 18 and 18 formed on the tip side are fixed to both side surfaces by welding or the like. Anchor members 29 are fixed to the side surfaces 28 by welding or the like.
A base plate 17 to which a nut 24 is fixed is fixed to the base end side of the rectangular tube body 26 by welding or the like.
The engaging member 20, the leaf spring 21 and the like are arranged in the same manner as in the first embodiment described above.

7 to 9 show a joint structure according to a third embodiment of the present invention.
Also in the joint structure according to the third embodiment, the male joint 3 has the same configuration as that of the first embodiment. 7 is a side view showing the internal structure of the female joint, FIG. 8 is a plan view of FIG. 7 viewed from a direction different from 90 °, and FIG. 9 is a view in the direction of arrow B in a state where the housing lid is removed in FIG. is there.
In the female joint 4 according to the present embodiment, a rectangular tube-shaped housing 16 is fixed to the inner surface of the main girder plate 14 by welding or the like, and a lid 32 is attached to the rear end. An engagement plate 31 made of a flat plate material is disposed inside the housing 16. The engagement plate 31 is formed in a substantially U shape in side view by a central portion 31a fixed in contact with the main girder plate 14 and flat end portions 31b and 31c bent at both ends thereof (see FIG. (See FIG. 7).

As shown in FIG. 9, an insertion hole 33 for inserting the joining rod 9 is drilled in the central portion 31 a of the engagement plate 31, and the recesses 34, 34 formed at the left and right ends thereof are welded portions to the main girder plate 14. It is said that. As shown in FIG. 8, the end portions 31 b and 31 c of the engagement plate 31 are each formed in a substantially T shape in the lateral direction, whereby the notches 18 and 18 are formed facing the top and bottom of the lateral T shape. . Flat-shaped engaging members 20 and 20 are respectively installed in the notches 18 and 18. 8, leaf springs 21 and 21 are fixed to the upper and lower inner walls of the housing 16 in the vicinity of the lid 32 with pins or the like, and the leaf springs 21 and 21 are inclined toward the central axis O toward the distal end, and the distal ends thereof. The engaging members 20 and 20 are pressed by the bent portions.
7 and 9, support plates 36, 36 are fixed to the main girder plate 14 at the vertical position of the housing 16, and anchor members 37, 37 are fixed to the support plates 36, 36 by welding or the like. Yes.

  Also in the joint structure according to the third embodiment, when the joint rod 9 is inserted into the housing 16 when the male joint 3 and the female joint 4 are fitted, the head 13 of the joint rod 9 is inserted into the insertion hole 33 of the engagement plate 31. After passing, the engaging members 20 and 20 installed in the notches 18 and 18 are pushed outward by the taper portion 13a against the urging force of the leaf springs 21 and 21 to get over. Then, the engaging members 20, 20 are pressed into the engaging recesses 12, 12 of the joining rod 9 by the urging force of the leaf springs 21, 21, so that the joining rod 9 of the male joint 3 is engaged with the female joint 4. The combined members 20 and 20 hold the engaged state.

Therefore, in the joint structure according to the third embodiment, not only the engagement member 20 but also the engagement plate 31 forming the notch 18 can be manufactured by bending a flat plate material, and the configuration of each component is simple. Manufacturing is easy and manufacturing costs can be reduced.
Since the female joint 4 according to the present embodiment is sealed inside by the housing 16, it is not necessary to dispose the cover member 23 on the outside when filling the concrete in the mold.

10 and 11 show a joint structure according to a fourth embodiment of the present invention. FIG. 10 is a view showing the internal structure of the female joint housing in which the male joint is indicated by a two-dot chain line. FIG. It is the side view of the internal structure which looked at the female type | mold joint from 90 degrees different direction.
In FIGS. 10 and 11, portions different from the third embodiment of the female joint 4 will be described. The base end portion of the housing 16 is made of, for example, a resin provided with an elastically deformable bellows portion 39 a instead of the lid 32. A cap 39 is fitted as a substrate. Anchor members 37 are fixed to the opposing outer surfaces of the housing 16 by welding or the like. The rest of the configuration is the same as that according to the third embodiment.

12 and 13 show the joint structure according to the fifth embodiment of the present invention. FIG. 12 shows the internal structure of the female joint in which the male joint is shown by a two-dot chain line. FIG. It is the side view of the internal structure which looked at the female type | mold joint from the direction 90 degrees different.
In FIG. 12 and FIG. 13, a portion different from the fourth embodiment of the female joint 4 will be described. A pair of substantially T-shaped engagement plates 41, 41 facing the inside of the housing 16 instead of the engagement plate 31 is laterally oriented. The base of each engagement plate 41 is fixed to the main girder plate 14 by welding or the like. Therefore, each engagement plate 41 is configured as a notch 18 in which the recess between the T-shaped head 41 a and the main girder plate 14 places the engagement member 20.
The rest of the configuration is the same as that according to the fourth embodiment.
According to this embodiment, the structure which forms the notch parts 18 and 18 is further simplified compared with the joint structure by 4th embodiment.

The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.
For example, the urging member that urges the flat engagement member 20 into the notch 18 is not limited to the plate spring 21, and is a substantially arc-shaped plate spring that presses the engagement member 20 at the abdomen. A suitably shaped member such as an elastic member such as rubber or rubber can be used.
Further, the outer peripheral surface 16a of the housing 16, each having the notch 18, the side plate 28, the engagement plate 31, the engagement plate 41, and the like constitute a member having the notch.

The joint structure by 1st embodiment of this invention is shown, and it is explanatory drawing which shows a male joint and a female joint in a separated state. It is an enlarged view of the head of a male joint. It is the side view which looked at the female coupling shown in FIG. 1 from the direction 90 degrees different. It is the sectional view on the AA line of FIG. 3 which shows the fitting state of the joint rod of a male joint with respect to a female joint. It is a disassembled perspective view of the female coupling by 2nd embodiment. FIG. 6 is a side view of the female joint shown in FIG. 5. It is a longitudinal cross-sectional view of the female coupling by 3rd embodiment. It is the side view which looked at the female coupling shown in FIG. 7 from the direction 90 degrees different. It is a B direction arrow directional view in FIG. 7 of the state which removed the cover of the housing. It is a longitudinal cross-sectional view of the female coupling by 4th embodiment. It is the side view which looked at the female coupling shown in FIG. 10 from the direction which differs 90 degrees. It is a longitudinal cross-sectional view of the female coupling by 5th embodiment. It is the side view which looked at the female coupling shown in FIG. 12 from 90 degrees different directions.

Explanation of symbols

1A, 1B Segment 3 Male joint 4 Female joint 9 Joint rod (male joint body)
12 engaging recess 13 head 13b wall surface 16 housing 18 notch 20 engaging member 21 leaf spring (biasing member)
28 Side plate (engagement plate)
31 Engagement plate 41 Engagement plate

Claims (6)

A joint structure for engaging a male joint and a female joint to join a member having a male joint and a member having a female joint to each other,
The male joint includes a male joint body provided with an engagement recess on the base end side of the head provided on the distal end side,
The female joint includes a housing into which a male joint body is inserted, a member provided in the housing or in the housing and having a notch at an opposing position, and provided in the notch so as to be able to advance and retract. A rectangular flat plate-like engagement member that can be engaged with the engagement recess of the mold joint body, and a biasing member that biases the engagement member in a direction of pressing the engagement member into the notch,
When the male joint body is inserted into the housing of the female joint, the head of the male joint body moves over the engagement member by moving the engaging member away from the urging force of the urging member. A coupling structure characterized in that an engagement member is engaged with the engagement recess.   The joint structure according to claim 1, wherein the member having the notch is an opposing outer peripheral surface of the housing.   The joint structure according to claim 2, wherein the housing is covered with a cover member.   2. The joint according to claim 1, wherein the member having the cutout is an engagement plate formed by bending a flat plate into a substantially U-shape and having a pair of cutouts formed at opposite flat plate ends. Construction.   2. The joint structure according to claim 1, wherein the member having the notch is a pair of opposing flat plate-like engagement plates fixed to the main beam plate and provided with the notch.   The joint structure according to any one of claims 1 to 5, wherein the male joint body has a wall surface that partitions the head and the engagement recess inclined at an acute angle toward the engagement recess.

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