Concrete member connection device

Abstract

To provide a coupling apparatus of concrete members with a reduced manufacturing cost of a mail locking member while ensuring a strength against a shear load.SOLUTION: A coupling apparatus of concrete members includes a female coupling member 1 including a female locking member 12 and a mail coupling member 2 including a mail locking member 23. By inserting the male locking member 23 into a locking hole 12c, the locking hole 12c expands in diameter and then the locking hole 12c contracts in diameter, so that a locking portion 12b of the female locking member and a locking portion 23c of the male locking member are engaged. The male coupling member 2 includes a proximal portion 25. An outer diameter of the proximal portion 25 is formed to be larger than outer diameters of the locking portion 23b and a male screw 23a, and an outer diameter of an end portion on the locking portion side of the proximal portion 25 is tapered toward the locking portion side, and an outer diameter of an end portion on the male screw side of the proximal portion 25 is tapered toward the locking portion side. A far side of the proximal portion 25 is located deeper side than one of a concrete member side face 35a in the other concrete member 35, and an outer circumference of a coupling body 22 is provided with a first adjustment member 21 formed by a deformable member.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a connecting device for concrete members. [Background technology]

[0002] Conventionally, a known connecting device for connecting concrete members to each other uses a female connecting member 100 and a male connecting member 101 as shown in FIG.

[0003] This female connecting member 100 has a casing 103 which has a tapered hole 102 formed in the axial direction inside and has multiple sliding guide ridges which are divided circumferentially and extend along the axial direction on the inner surface of the tapered hole 102; a female locking member (wedge nut) 106 whose outer surface is formed into a tapered surface 104 which conforms to the tapered hole 102 and whose inner surface has a female thread 105; and a compression spring 107 which presses this wedge nut 106 towards the tip.

[0004] In addition, the male connecting member 101 has a connecting body 109 provided inside a cylindrical adjustment member 108 formed from a deformable material, for example, an elastic material such as polystyrene foam, rubber, resin, or cardboard, and a male locking member 110 is provided at the tip of the connecting body 109. A male thread 111 that engages with the female thread 105 of the female connecting member 100 is engraved on the outer periphery of the male locking member 110.

[0005] An anchor bar 112 is fixedly attached to the rear of the connector 109 by screwing, a stopper is provided at the rear end of the anchor bar 112, and a space-retaining pipe 113 made of a metal or an elastic material such as rubber is provided on the outer periphery of the anchor bar 112. The front end of the space-retaining pipe 113 engages with the rear side of the adjustment member 108, and the rear end engages with a seat member (not shown) made of a rubber or other elastic material provided on the stopper (not shown) of the anchor bar 112. A gap 114 is provided between the anchor bar 112 and the space-retaining pipe 113.

[0006] When connecting the connector, the male locking member 110 is inserted into the female connecting member 100 without rotating the female connecting member 100, and the female thread 105 of the divided wedge nut 106 engages with the male thread 111 of the male locking member 110, pushing the wedge nut 106 toward the larger diameter side against the compression spring 107, and the female thread 105 formed by the multiple wedge nuts 106 is inserted into the male locking member 110 without rotating the female connecting member 100. The inner diameter of the screw hole expands to allow the male locking member 110 to be inserted up to a predetermined position in the female connecting member 100, and once insertion is complete, the female threads 105 of the wedge nut 106 engage with the male threads 111 of the male locking member 110 due to the biasing force of the compression spring 107, thereby connecting the female connecting member 100 and the male connecting member 101.

[0007] There is a demand for connecting concrete shield segments used in tunnels, for example, using the connector constructed as above. In this case, the female connector 100 of the connector is provided on one shield segment, and the male connector 101 is provided on the other shield segment. Summary of the Invention [Problem to be solved by the invention]

[0008] A hollow section 115 that is open at both axial ends is formed in the connecting body 109 of the male connecting member 101, and a female thread is engraved along the entire inner wall of the hollow section. The male locking member 110 is attached to the connecting body 109 by screwing a male thread 116 engraved on the inner side of the male locking member 110 into the female thread 116.

[0009] Therefore, in order to ensure the strength against the shear load applied to male locking member 110 when both shield segments are connected, male locking member 110 needs to have a certain diameter or more, which poses a problem in terms of manufacturing costs.

[0010] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a connecting device for concrete members which reduces the manufacturing costs of the male locking members while ensuring strength against shear loads. [Means for solving the problem]

[0011] In order to solve the above problem, the invention described in claim 1 has a female connecting member and a male connecting member, A storage chamber having an open tip is provided in the female connecting member, and a female locking member having a locking portion formed of a continuous locking ridge on an inner surface side is provided in the storage chamber, a male locking member having a locking portion formed of a continuous locking ridge at a tip of the male connecting member; A locking hole is formed on the inner side of the female locking member, By inserting the male locking member into the locking hole, the locking hole expands in diameter and then contracts in diameter, so that the locking portion of the female locking member and the locking portion of the male locking member engage with each other, The female connecting member is fixed to one concrete member, and the male connecting member is fixed to the other concrete member, The male connecting member has a connecting body having a hollow portion with an opening at a tip, and a female screw is formed on the inner wall of the hollow portion of the connecting body, A base is provided on the inner side of the locking portion, and a male screw is formed on the inner side of the base to screw into the female screw of the connector, The outer diameter of the base is larger than the outer diameters of the locking portion and the male screw, The outer diameter of the locking portion side end of the base is made thinner toward the locking portion side, and the outer diameter of the male thread side end of the base is made thinner toward the locking portion side, A gap is formed between the outer surface of the base and a member positioned outside the base, The rear side of the base is located rearward of the one concrete member side surface of the other concrete member, The connector is characterized in that a first adjustment member made of a deformable material is provided on the outer periphery of the connector.

[0012] The invention described in claim 2 is the invention described in claim 1, wherein a tapered hole having a tapered surface with a diameter decreasing toward the front is formed in the storage chamber, a wedge-shaped female locking member divided in the circumferential direction is arranged in the tapered hole so as to be slidable in the axial direction, and a locking portion consisting of a plurality of locking ridges is engraved on the inner surface of the female locking member, and the female locking member is biased forward by a biasing means, The male locking member is inserted into a locking hole formed by the female locking member. The locking hole is expanded in diameter, and then contracted in diameter by a biasing means so that the locking portion of the female locking member and the locking portion of the male locking member engage with each other.

[0013] The invention described in claim 3 is the invention described in claim 1 or 2, wherein a tip end of the connector is positioned on a rear side of the side surface of the one concrete member of the other concrete member, The base portion is provided on the tip side of the tip end of the connector, The present invention is characterized in that a space is formed around the back side of the base.

[0014] The invention described in claim 4 is characterized in that, in the inventions described in claims 1 to 3, a connector movement suppression member is provided on the radial outside of the axis of the male locking member in the first adjustment member, the connector movement suppression member being made of metal and suppressing radial movement of the male locking member in the connector around the axis of the male locking member.

[0015] The invention described in claim 5 is characterized in that, in the invention described in claim 4, a second adjustment member formed of a deformable member is provided radially outward from the axis of the male locking member in the connector movement inhibiting member.

[0016] The invention of claim 6 is the invention of claim 3, further comprising a base movement suppressing member formed of metal on the radial outside of the axis of the male locking member at the back side of the base, the base movement suppressing member suppressing radial movement of the male locking member at the base, the base movement suppressing member being formed of metal on the radial outside of the axis of the male locking member at the base, The space is formed between the base movement suppressing member and the base, The base movement suppression member is characterized in that it is embedded in the other concrete member.

[0017] The invention described in claim 7 is characterized in that, in the invention described in claim 6, a second adjustment member formed of a deformable member is provided radially outward from the axis of the male locking member in the base movement suppressing member.

[0018] The invention described in claim 8 is the invention described in claim 6 or 7, further comprising a first adjustment member formed of a deformable member on the outer periphery of the connecting body, and a connecting body movement suppressing member formed of metal on the outer side in the radial direction around the axis of the male locking member of the first adjustment member, which suppresses movement of the connecting body in the radial direction around the axis of the male locking member, The connector movement suppressing member and the base movement suppressing member are formed integrally. Effect of the Invention

[0019] In the present invention, the outer diameter of the base is made larger than the outer diameter of the locking portion and the male screw, and the inner side of the base is positioned on the inner side of the other concrete member relative to the side surface of the one concrete member, thereby increasing the strength of the male locking member against the shear load applied thereto. This allows the male locking member to be made thinner, and reduces the manufacturing cost of the male connecting member. [Brief description of the drawings]

[0020] [Figure 1] FIG. 2 is a partial cross-sectional view of one half of the concrete member connecting device in the first embodiment of the present invention, showing the connected state of the female connecting member and the male connecting member. [Diagram 2] FIG. 3 is a partial cross-sectional view of a half surface of a female connecting member used in the first embodiment of the present invention. [Diagram 3] FIG. 3 is a partial cross-sectional view of one half of a male connecting member used in the first embodiment of the present invention. [Figure 4]13 is a partial cross-sectional view for explaining a method of connecting a female connecting member and a male connecting member in a misaligned state. FIG. [Diagram 5] 5 is a partial cross-sectional view of the female connecting member and the male connecting member connected from the state shown in FIG. 4. [Figure 6] FIG. 11 is a partial cross-sectional view of one half of an example of a male connecting member used in Example 4 of the present invention. [Figure 7] FIG. 11 is a partial cross-sectional view of a half of another example of a male connecting member used in the fourth embodiment of the present invention. [Figure 8] FIG. 11 is a partial cross-sectional view of one half of an example of a male connecting member used in Example 5 of the present invention. [Figure 9] FIG. 13 is a cross-sectional view showing another example of a male connecting member used in the fifth embodiment of the present invention. [Figure 10] FIG. 13 is a cross-sectional view showing another example of a male connecting member used in the fifth embodiment of the present invention. [Figure 11] FIG. 23 is a partial cross-sectional view of one half of an example of a male connecting member used in Example 6 of the present invention. [Figure 12] FIG. 23 is a cross-sectional view showing another example of a male connecting member used in the sixth embodiment of the present invention. [Figure 13] FIG. 23 is a cross-sectional view showing another example of a male connecting member used in the sixth embodiment of the present invention. [Figure 14] FIG. 13 is a partial cross-sectional view of one half of an example of a male connecting member used in Example 7 of the present invention. [Figure 15] FIG. 13 is a partial cross-sectional view of one half of an example of a male connecting member used in Example 8 of the present invention. [Figure 16] FIG. 2 is a partial cross-sectional side view of a conventional male connecting member and a female connecting member. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the accompanying drawings.

[0022] [Example 1] 1 to 5 show a first embodiment of the present invention.

[0023] Fig. 1 shows a connecting device 10 for concrete members according to a first embodiment of the present invention, which has a female connecting member 1 and a male connecting member 2. Fig. 2 shows a partial cross-sectional view of half of the female connecting member 1, and Fig. 3 shows a partial cross-sectional view of half of the male connecting member 2. In the following description, the left side of the female connecting member 1 in Fig. 2 is referred to as the front part A, the right side as the rear side B, and the right side of the male connecting member 2 in Fig. 3 is referred to as the front part C, and the left side as the rear side D.

[0024] The female connecting member 1 has a casing 3, which is formed in a tubular, for example cylindrical, shape and has a storage chamber 4 formed therein. The front part A of the storage chamber 4 is formed into a conical tapered hole 5 whose inner circumferential surface is a tapered surface whose inner diameter gradually increases from the front part A (the tip part 4a side) to the inner side (rear side) B, and the middle part of the storage chamber 4 is formed into a biasing means storage part 6. A female thread 3a is engraved on the inner circumferential surface of the rear part of the casing 3.

[0025] At the front end of the storage chamber 4, a cylindrical insertion portion 7 is formed as an opening.

[0026] A plurality of sliding guide ridges (not shown) are formed in the tapered hole 5 along the axis XX direction and divided in the circumferential direction. A plurality of wedge-shaped female locking members 12 divided in the circumferential direction are disposed in the tapered hole 5 so as to be slidable in the axis XX direction of the casing 3 between the sliding guide ridges. The number of female locking members 12 is three in this embodiment, but may be set arbitrarily. In the following, the female locking members 12 are also referred to as wedge nuts 12. The sliding guide ridges may not be provided.

[0027] The number of wedge nuts 12 is three in this embodiment, but may be one or more. It is also possible to set it so that adjacent wedge nuts 12 are partly joined to each other to be integrally formed, and that the wedge nuts 12 can move in the forward and backward directions while partly joined to each other, so that when they move toward the front A side, the locking hole 12c described below is reduced in diameter, and when they move toward the back B side, the locking hole 12c is expanded in diameter. Also, when manufacturing the female connecting member 1, adjacent wedge nuts 12 are partly joined to each other to be integrally formed, and when a male locking member 23 described below is inserted into the locking hole 12c, the wedge nuts 12 can be separated into a plurality of pieces.

[0028] Furthermore, the outer surface of the wedge-shaped female locking member 12 is formed into a tapered surface 12a that follows the tapered surface of the tapered hole 5, that is, the outer diameter gradually expands from the front side A (tip portion 4a) side to the back side B. Furthermore, on the inner peripheral surface of each female locking member 12, a locking portion (female thread) 12b consisting of a helical locking ridge and locking groove is engraved in an arc centered on the axis XX of the casing 3 and in a direction along the axis XX. As long as this helical locking portion 12b is formed in a helical shape, any shape of thread can be used as the cross-sectional shape, and the locking portion (female thread) 12b consisting of a saw-tooth-shaped locking ridge and locking groove with an axial cross-section in the shape of a scalene triangle and a small taper angle at the tip, an isosceles triangle, a right-angled triangle, or the like can be used.

[0029] As a result of the above, a locking hole (internal thread hole) 12c is formed by the multiple wedge nuts 12, and as each wedge nut 12 retreats along the tapered surface, the internal thread hole 12c is enlarged in diameter, and as each wedge nut 12 moves toward the forward side A, the internal thread hole 12c is reduced in diameter.

[0030] A biasing means receiver (spring receiver) 13 that commonly engages with each wedge nut 12 is disposed at the rear end of the wedge nut 12. The number of the biasing means receiver 13 may be one or more.

[0031] A lid 14 having a screw hole 14a formed in the center thereof is screwed onto the female thread 3a at the back side B portion of the casing 3.

[0032] The biasing means 15 is provided between the biasing means receiver 13 and the cover 14. The biasing means 15 is formed of an elastic material such as a coil spring, rubber, resin, or urethane. In this embodiment 1, a coil spring is used and stored in a compressed state. Due to the biasing force of the biasing means 15, each wedge nut 12 is constantly biased toward the tip end 4a (front A).

[0033] An anchor bar 18 protruding from the cover 14 toward the rear side B is screwed and fixed to the cover 14. A retaining portion 18a is provided on the rear side B of the anchor bar 18 so as to protrude outwardly.

[0034] As shown in Figure 1, the female connecting member 1 is embedded and fixed in one of the shield segments 19, which is one of the concrete members, so that the surface 3c on the tip end 4a side of the casing 3 is flush with the joint surface 19a of the shield segment 19.

[0035] Next, the male connecting member 2 will be described.

[0036] The male connecting member 2 has a first adjusting member 21 formed of a deformable material, for example, an elastic material such as polystyrene foam or rubber, resin, cardboard, or the like. The first adjusting member 21 is formed into a cylindrical shape with circular inner and outer circumferential surfaces, and a connecting body 22 having a circular outer surface is provided within this first adjusting member 21. That is, the first adjusting member 21 is provided on the outside in the radial direction of the connecting body 22 centered on the axis YY of the male connecting member 2. The outer circumferential surface shape of the first adjusting member 21 and the connecting body 22 can be formed into any shape other than a circle, such as a hexagon.

[0037] The connector 22 is made of metal and has a hollow section 22a that is open at both axial ends (front end C and rear end D). A female screw 22b is engraved on the inner wall of the hollow section 22a from the front end C to the rear end D, and a cylindrical section 22c that is formed in an unthreaded cylindrical shape is formed between the tip of the female screw 22b and the tip of the connector 22.

[0038] As shown in FIG. 3, a male screw 23a engraved on the inner side of a male locking member 23 is screwed into a tip C of the female screw 22b of the connector 22.

[0039] The male locking member 23 protrudes from the tip of the connector 22, and at its tip (front side) C, a dome-shaped guide portion 24 is formed, the diameter of which decreases at the tip C. That is, a curved surface that guides the female locking member 12 is formed at the tip, and at the back side D, and further forward than the male thread 23a, a locking portion (male thread) 23b consisting of a helical locking ridge and locking groove is engraved.

[0040] The locking portion 23b can be of any shape as long as it is helical and corresponds to the locking portion 12b of the wedge nut 12, for example, a locking portion (male thread) 23b consisting of locking peaks and locking grooves in a sawtooth shape with a scalene triangular cross section in the axial direction and a small taper angle at the tip, an isosceles triangle, a right triangle, etc. The diameter of the locking portion 23b is set to be slightly larger than the diameter of the screw hole 12c formed by each wedge nut 12 when it is fully advanced.

[0041] A base portion 25 is formed between the locking portion (male thread) 23b and the male thread 23a, and the base portion 25 is configured as an unthreaded cylinder having approximately the same diameter in the axis YY direction, as shown in FIG.

[0042] The outer diameter of the base 25 is larger than the outer diameter of the male thread 23a and the locking portion 23b, and the inner side of the base 25 is fitted into the cylindrical portion 22c of the hollow portion 22a. The outer diameter of the base 25 is smaller than the inner diameter of the insertion portion 7 of the female connecting member 1.

[0043] As shown in Fig. 3, an anchor bar 30 is fixedly attached by screwing to the rear side D of the connector 22. A flange-shaped retaining portion 30a is provided at the rear side D end of the anchor bar 30. A space retaining pipe 31 made of an elastic material such as rubber or metal is provided on the outer periphery of the anchor bar 30. The front end of the space retaining pipe 31 is engaged with the retaining portion 21a on the rear side D of the first adjustment member 21, and the rear side D end is engaged with a seat member 32 made of an elastic material such as rubber provided on the retaining portion 30a of the anchor bar 30. A gap 33 is provided between the anchor bar 30 and the space retaining pipe 31.

[0044] In addition, without providing the gap maintaining pipe 31 and the gap 33, the entire outer circumference of the part of the anchor bar 30 corresponding to the gap maintaining pipe 31 may be formed from an elastic material such as rubber, for example, and the first adjustment member 21 may be formed by extending to the rear side.

[0045] As shown in Figures 4 and 5, the first adjustment member 21, the anchor bar 30, and the gap retaining pipe 31 are embedded and fixed in the other shield segment 35, which is the other concrete member, so that the front end face 22d of the connector 22 is flush with the joint face 35a of the shield segment 35, and concrete is poured outside the first adjustment member 21, the gap retaining pipe 31, and the anti-slip portion 30a.

[0046] A sealing material (not shown) is provided to protrude from the joint surface 19a of the shield segment 19 on one side, and a sealing material (not shown) is provided to protrude from the joint surface 35a of the other shield segment 35 on the other side.

[0047] The male connecting member 2 provided on the other concrete member 35 is made of a deformable material. The interaction between the first adjustment member 21, the gap 33, the gap retaining pipe 31, and the seat member 32 allows the anchor bar 30 to be displaced in a direction perpendicular to its axis YY, centered on the retaining portion 30a of the anchor bar 30.

[0048] The distance (thread pitch) between the locking threads of the female thread 12b of the wedge nut 12 and the male thread 23b of the male locking member 23 is set arbitrarily, and in this embodiment, it is set smaller than the thread pitch for the nominal diameter of the fine thread specified by JIS.

[0049] Next, a connecting method for connecting concrete members using the connecting device 10 of the present invention will be described.

[0050] First, with the axis XX of the female connecting member 1 and the axis YY of the male locking member 23 of the male connecting member 2 positioned approximately coaxially, one shield segment 19 and the other shield segment 35 are brought relatively close to each other, and the male locking member 23 is inserted through the opening of the insertion portion 7 of the female connecting member 1.

[0051] When the male locking member 23 is inserted from the insertion portion 7 of the female connecting member 1, the male locking member 23 moves each wedge nut 12 backward against the biasing force of the biasing means 15, enlarging the diameter of the screw hole 12c formed in each wedge nut 12, and advances while climbing over the locking ridges of each wedge nut 12.

[0052] When the tip surface of the casing 3 in the female connecting member 1, i.e., the joint surface 19a of one shield segment 19, comes into contact with the tip surface of the connector 22 in the male connecting member 2, i.e., the joint surface 35a of the other shield segment 35, and insertion of the male connecting member 2 is stopped, each wedge nut 12 is pushed back toward the tip 4a by the biasing force of the biasing means 15, and the diameter of the screw hole 12c formed in each wedge nut 12 is reduced by the tapered surface of the tapered hole 5, and the female thread 12b of each wedge nut 12 engages with the male thread 23b of the male locking member 23.

[0053] Since the female connecting member 1 and the male connecting member 2 of the present embodiment 1 have the above-mentioned structures, they provide the following functions and effects.

[0054] Even when the axis XX of the female connecting member 1 and the axis YY of the male connecting member 2 are not concentric (misaligned) as shown in Figure 4, the interaction between the first adjustment member 21 made of a deformable member, the gap 33, the gap retaining pipe 31, and the seat member 32 allows the axis of the male locking member 23 to be displaced in a direction perpendicular to the axis YY of the male connecting member 2, as shown in Figure 5, around the anti-slip portion 30a of the anchor bar 30, and the male locking member 23 can be inserted into the screw hole 12c of the female connecting member 1.

[0055] Furthermore, as shown in Figure 5, when the female connecting member 1 and the male connecting member 2 are connected with the axis YY of the male connecting member 2 tilted relative to the axis XX of the female connecting member 1, after the base 25 of the male locking member 23 abuts against the insertion portion 7, the axis of the male locking member 23 is guided in the direction of the axis XX of the female connecting member 1, thereby preventing the positions of one wedge nut 12 and another wedge nut 12 from differing significantly in the axial direction.

[0056] As a result, even if a large external force acts between the shield segments 19, 35 in a direction separating them after connection, the mesh size between the shield segments 19, 35 can be minimized, preventing water leakage from between the shield segments 19, 35. In addition, because the mesh size can be made smaller, the amount of sealing material provided between the shield segments 19, 35 can be made smaller, reducing manufacturing costs.

[0057] Furthermore, when the shield segments 19 and 35 are connected, the shear load applied to the male connecting member 2 is By setting the outer diameter so as to obtain the strength required for base 25, which is the strongest, and making the outer diameter of male thread 23a and locking portion 23b of male locking member 23 thinner than base 25, the outer diameter of the entire male connecting member 2 can be made thin, and even if the outer diameter of the entire male connecting member 2 is made thin in this way, the strength required of the male connecting member 2 can be ensured. Furthermore, by making the outer diameter of the entire male connecting member 2 thin, the manufacturing cost of the male connecting member 2 can be reduced.

[0058] [Example 2] In the above-mentioned embodiment 1, the locking portion 23b of the male locking member 23 and the locking portion 12b of the female locking member 12 are formed with spiral locking ridges and locking grooves, but the locking portion 23b of the male locking member 23 and the locking portion 12b of the female locking member 12 may be formed with a plurality of locking ridges and locking grooves formed in a ring shape perpendicular to the axis XX, YY and arranged continuously in the axial direction.

[0059] The locking ridges and locking grooves of the locking portion 23b of the male locking member 23 and the locking portion 12b of the female locking member 12 can be formed as desired. For example, a locking portion consisting of a series of locking ridges in the shape of an isosceles triangle, or a locking portion consisting of a series of locking ridges in the shape of a right triangle or a scalene triangle with a small taper angle at the tip can be used.

[0060] The dimension of the interval (pitch) between the locking threads is set to a value equivalent to the dimension of the thread pitch shown in the first embodiment.

[0061] Other members have the same structure as in the first embodiment, and therefore the description thereof will be omitted.

[0062] Moreover, in the second embodiment as well, the same actions and effects as those in the first embodiment are achieved.

[0063] [Example 3] In the above-mentioned first and second embodiments, the male connecting member 2 is provided with the first adjustment member 21, the anchor bar 30, the gap retaining pipe 31, etc., so that the male locking member 23 can be displaced in a direction perpendicular to the axis YY of the male connecting member 2. However, the female connecting member 1 may also be provided with members that have the same effect as the first adjustment member 21, the anchor bar 30, the gap retaining pipe 31, etc., of the male connecting member 2, so that the female connecting member 1 can be displaced in a direction perpendicular to its axis XX, centered on the anti-slip portion of the anchor bar.

[0064] The other members have the same structure as in the first and second embodiments, and therefore the description thereof will be omitted.

[0065] Also in this third embodiment, the same actions and effects as those in the first and second embodiments are achieved.

[0066] [Example 4] The present embodiment 4 shown in Figure 6 is provided with a connector movement suppression member 40 formed of metal on the radial outside of the axis YY of the male connecting member 2 in the first adjustment member 21 of the above embodiments 1 to 3, and suppresses the radial movement of the male connecting member 2 in the connector 22 around the axis YY of the male connecting member 2.

[0067] The connector movement suppression member 40 is disposed so that its tip surface is substantially flush with the joint surface 35 a of the other shield segment 35 .

[0068] 6, the connector movement suppression member 40 may be formed so as to cover the entire circumference of the front end C of the first adjustment member 21, or as shown in FIG. 7, the connector movement suppression member 40 may be formed so as to cover the entire outer circumferential surface of the first adjustment member 21. It may be formed to cover the

[0069] The other members have the same structure as in the first to third embodiments, and therefore the description thereof will be omitted.

[0070] Also in this fourth embodiment, the same actions and effects as those in the first to third embodiments are achieved.

[0071] Furthermore, in this embodiment 4, a connector movement suppression member 40 is provided to suppress radial movement of the male connecting member 2 in the connector 22 around the axis YY. Therefore, when the male connecting member 2 is connected to the female connecting member 1 as shown in Figure 5, when the axis YY of the male connecting member 2 is inclined with respect to the axis XX of the female connecting member 1, the radial movement of the male connecting member 2 around the axis YY is suppressed, the load applied to the shield segment 35 is reduced, and the occurrence of cracks in the shield segment 35 is suppressed.

[0072] [Example 5] In the male connecting member 2 of Examples 1 to 4 above, the rear side portion of the base 25 was fitted into the cylindrical portion 22c of the hollow portion 22a of the connecting body 22. However, in the male connecting member 46 of this Example 5, as shown in FIG. 8, the base 25 is not fitted into the connecting body 42, but is positioned so as to be located on the tip C side of the connecting body 42, and the rear side B portion 41a of the base 41 is positioned on the rear side B of the joint surface 35a of the other shield segment 35.

[0073] The hollow portion 42a of the connecting body 42 is formed so that both axial ends (front end C and rear end D) are open, and a female thread 42b is engraved on the inner wall of the hollow portion 42a over the entire length from the front end to the rear end, and the unthreaded cylindrical portion 22c of the above-mentioned Example 1 is not formed.

[0074] A brim-shaped base movement suppressing member 44 made of metal and having a hole 44a formed in the center is provided on the radial outside of the axis YY of the male connecting member 2 in the connecting body 42 of the rear side portion 41a of the base 41, and a space 45 is formed between the rear side portion 41a of the base 41 and the inner surface of the hole 44a in the base movement suppressing member 44. In addition, a tip surface 44b of the base movement suppressing member 44 is formed so as to be positioned on approximately the same plane as the joint surface 35a of the other shield segment 35.

[0075] The outer circumferential surface 44c of the base movement suppression member 44 may be formed so as to be perpendicular to the tip surface 44b as shown in Fig. 8, or may be formed so that the radially outer end of the rear end surface 44d, which is centered on the axis YY of the male coupling member 2, is positioned outside the radially outer end of the tip surface 44b, which is centered on the axis YY of the male coupling member 2. For example, as shown in Fig. 9, it may be formed in a tapered shape that is positioned more outward as it approaches the rear side, or as shown in Fig. 10, a step 47 may be formed so that the outer end of the rear end surface 44d is positioned outside the outer end of the tip surface 44b.

[0076] The other members have the same structure as in the first to fourth embodiments, and therefore the description thereof will be omitted.

[0077] Also in this fifth embodiment, the same actions and effects as those in the first to fourth embodiments are achieved.

[0078] Furthermore, in the male connecting member 46 of this Example 5, the base 41 is not fitted into the connecting body 42 but is provided so as to be located at the tip side of the connecting body 42, and the rear side portion 41a of the base 41 is located rearward of the joint surface 35a of the other shield segment 35. As a result, the outer diameter of the connecting body 42 of the male connecting member 46 can be formed thinner than the outer diameter of the connecting body 22 of the male connecting member 2 of Examples 1 to 4 above. Since it can be formed to be thinner than the outermost diameter, the manufacturing cost of the male connecting member 46 can be reduced.

[0079] When the radial outer end of the male connecting member 2 at the rear end face 44d, centered on the axis YY, is formed to be positioned outer than the radial outer end of the male connecting member 2 at the tip face 44b, centered on the axis YY, the base movement suppression member 44 can be prevented from falling off from the other shield segment 35.

[0080] [Example 6] In this Example 6, a second adjustment member 50 formed from a deformable member, for example, an elastic material such as polystyrene foam or rubber, resin, cardboard, etc., is provided radially outward from the axis YY of the male connecting member 2 in the base movement suppression member 44 of Example 5 above.

[0081] The shape of the second adjustment member 50 can be arbitrarily formed according to the shape of the outer circumferential surface 44c of the base movement suppressing member 44, as shown in FIGS.

[0082] The other members have the same structure as in the fifth embodiment, and therefore the description thereof will be omitted.

[0083] Moreover, in the sixth embodiment as well, the same actions and effects as those in the fifth embodiment are achieved.

[0084] Furthermore, by providing a second adjustment member 50 radially outside the base movement suppression member 44, the female connecting member 1 and the male connecting members 2, 46 can be connected well even if the misalignment between the axis XX of the female connecting member 1 and the axis YY of the male connecting members 2, 46 is large.

[0085] [Example 7] In this embodiment 7, a connector movement inhibiting member 60 is provided on the radial outside of the axis YY of the male connecting member 2 in the first adjustment member 21 of the above-mentioned embodiment 5, and the male connecting member 2 is adapted to inhibit radial movement of the male connecting member 2 in the connector 42 around the axis YY, and the connector movement inhibiting member 60 is integrally formed with a base movement inhibiting member 44 similar to the base movement inhibiting member 44 of the above-mentioned embodiment 5.

[0086] The other members have the same structure as in the fifth embodiment, and therefore the description thereof will be omitted.

[0087] Moreover, in the seventh embodiment, the same actions and effects as those in the fifth embodiment are achieved.

[0088] [Example 8] In this embodiment 8 shown in Figure 15, a second adjustment member 70 made of a deformable member, for example, an elastic material such as polystyrene foam, rubber, resin, cardboard, etc., is formed radially outward from the axis YY of the male connecting member 2 in the connector movement inhibiting member 60 and the base movement inhibiting member 44 of the above-mentioned embodiment 7, so as to cover the entire outer peripheral surfaces of the connector movement inhibiting member 60 and the base movement inhibiting member 44.

[0089] The other members have the same structure as in the seventh embodiment, and therefore the description thereof will be omitted.

[0090] Moreover, in the eighth embodiment as well, the same actions and effects as those in the seventh embodiment are achieved.

[0091] Furthermore, in this embodiment 8, a second adjustment member 70 is provided on the outside of the connector movement suppression member 60 and the base movement suppression member 44 in the radial direction centered on the axis YY of the male connector 2. As a result, even if the misalignment between the axis XX of the female connecting member 1 and the axis YY of the male connecting members 2, 46 is large, the female connecting member 1 and the male connecting members 2, 46 can be connected satisfactorily.

[0092] Although specific examples of the present invention have been described in detail above, these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples exemplified above. [Explanation of symbols]

[0093] 1 Female connector 2,46 Male connecting member 3. Casing 4. Storage Room 5 Tapered hole 10 Concrete member connection device 12 Female locking member 12b: Locking portion of female locking member 12c locking hole 15. Actuating means 19, 35 Shield segment (concrete member) 21 First adjustment member 22,42 Concatenation 22a Hollow part 22b Male thread 22c Cylindrical section 23 Male locking member 23b Male locking member locking portion 25 Base 40,60 Connector movement suppression member 44 Base movement suppression member 45 Space 50,70 Second adjustment member

Claims

1. A female connector and a male connector are provided. A storage chamber having an open tip is provided in the female connecting member, and a female locking member having a locking portion formed of a continuous locking ridge on an inner surface side is provided in the storage chamber, a male locking member having a locking portion formed of a continuous locking ridge at a tip of the male connecting member; A locking hole is formed on the inner side of the female locking member, By inserting the male locking member into the locking hole, the locking hole expands in diameter and then contracts in diameter, so that the locking portion of the female locking member and the locking portion of the male locking member engage with each other, The female connecting member is fixed to one concrete member, and the male connecting member is fixed to the other concrete member, The male connecting member has a connecting body having a hollow portion with an opening at a tip, and a female screw is formed on the inner wall of the hollow portion of the connecting body, A base is provided on the inner side of the locking portion, and a male screw is formed on the inner side of the base to screw into the female screw of the connector, The outer diameter of the base is larger than the outer diameters of the locking portion and the male screw, The outer diameter of the locking portion side end of the base is made thinner toward the locking portion side, and the outer diameter of the male thread side end of the base is made thinner toward the locking portion side, A gap is formed between the outer surface of the base and a member positioned outside the base, The rear side of the base is located rearward of the one concrete member side surface of the other concrete member, A connecting device for concrete members, characterized in that a first adjustment member made of a deformable material is provided on the outer periphery of the connecting body.

2. A tapered hole having a tapered surface whose diameter decreases toward the front is formed in the storage chamber, a wedge-shaped female locking member divided in the circumferential direction is disposed in the tapered hole so as to be slidable in the axial direction, and a locking portion consisting of a plurality of locking ridges is engraved on the inner surface of the female locking member, and the female locking member is biased forward by a biasing means, 2. A concrete member connecting device as described in claim 1, characterized in that the male locking member is inserted into a locking hole formed by the female locking member, causing the locking hole to expand in diameter, and then the locking hole is narrowed in diameter by a biasing means so that the locking portion of the female locking member and the locking portion of the male locking member engage with each other.

3. The tip end of the connector is positioned on the rear side of the other concrete member relative to the side surface of the one concrete member, The base portion is provided on the tip side of the tip end of the connector, 3. The connecting device for concrete members according to claim 1, further comprising a space formed around a rear side portion of said base.

4. A connecting device for concrete members as described in any one of claims 1 to 3, characterized in that a connecting body movement suppression member formed of metal is provided on the radial outside of the axis of the male locking member in the first adjustment member, suppressing radial movement of the male locking member in the connecting body around the axis of the male locking member.

5. The concrete member connecting device according to claim 4, characterized in that a second adjustment member formed of a deformable member is provided radially outward from the axis of the male locking member in the connector movement suppression member.

6. a base movement suppressing member formed of metal and provided on the radial outside of the male locking member at the back side of the base, the base movement suppressing member suppressing radial movement of the male locking member at the base, the base movement suppressing member being provided on the radial outside of the male locking member at the back side of the base, the base movement suppressing member being provided on the radial outside of the male locking member at the base; The space is formed between the base movement suppressing member and the base, 4. The connecting device for concrete members according to claim 3, wherein the base movement suppressing member is embedded in the other concrete member.

7. The concrete member connecting device according to claim 6, characterized in that a second adjustment member formed of a deformable member is provided radially outwardly from the axis of the male locking member of the base movement suppression member.

8. a first adjustment member formed of a deformable member on the outer periphery of the connecting body, and a connecting body movement suppression member formed of metal on the outer side in a radial direction around the axis of the male locking member of the first adjustment member and suppressing movement of the connecting body in a radial direction around the axis of the male locking member, 8. The connecting device for concrete members according to claim 6 or 7, characterized in that the connector movement suppressing member and the base movement suppressing member are integrally formed.

Images