JP3222686U - Packing and joining structure - Google Patents

Abstract

Provided is a packing that can easily obtain a sealing force for a reinforcing bar even if the outer diameter of the reinforcing bar to be inserted changes. A cylinder body 31 and flaps 41, 42, 43 are provided, and the cylinder body 31 and the flaps 41, 42, 43 are integrally formed of the same elastic member. The inner diameter A of each of the flaps 41, 42, 43 is smaller than the outer diameter of the reinforcing bar. On the inner peripheral surface 33 of the first portion 61 from the predetermined position 53 to the end portion 51, there is a tapered surface 35 that is separated from the axis 30 of the cylindrical body 31 in the radial direction R as it proceeds from the predetermined position 53 to the end portion 51. Is formed. The front sides 71, 72, and 73 of the flaps 41, 42, and 43 have front surfaces 45, 46, and 47 in the insertion direction I-1, and the back side in the insertion direction I-1 toward the center C in the radial direction R. Inclined surfaces 75, 76, and 77 that incline toward are formed. [Selection] Figure 3

Description

  The present invention relates to a packing and a joining structure that can be inserted into, for example, a sleeve for joining reinforcing bars and prevent mortar from flowing out of the sleeve.

  When joining the reinforcing bars of a reinforced concrete column member, for example, a mortar filling type reinforcing bar joint method is used. In the mortar-filled rebar joint method, rebars are inserted into the openings at both ends of a cylindrical sleeve up to a specified length, and non-shrinkable, high-strength mortar is placed between the inner wall of the sleeve and the rebar and between the rebars. Fill and join the rebar and the sleeve. Packing is provided at both ends of the sleeve to prevent the mortar from flowing out of the sleeve.

  The outer diameter of the reinforcing bar has a plurality of fixed values depending on the usage of the reinforcing bar. Therefore, a sleeve and a packing having an inner diameter that matches the outer diameter of the reinforcing bar to be used are used. Moreover, depending on the structure of the building, reinforcing bars having different outer diameters may be joined together by a mortar filling type reinforcing bar joint method. As such a case, for example, there is a case where an upper floor reinforcing bar and a lower floor reinforcing bar having an outer diameter larger than the reinforcing bar are joined. Patent Document 1 discloses a mortar-filled reinforcing bar joint plug (packing) provided with a cylindrical body and a casing provided integrally with the cylindrical body.

Registered Utility Model No. 3041603

  When joining reinforcing bars using the plug for a mortar filling type reinforcing bar joint disclosed in Patent Document 1, the reinforcing bar is inserted into the mortar joint (sleeve) by passing the reinforcing bar through the box and then the bar is connected to the reinforcing bar with a wire or the like. Tie to. Therefore, the mortar-filled reinforcing bar joint plug disclosed in Patent Document 1 has a risk that the sealing force against the reinforcing bar becomes insufficient depending on how the wire is bound, and the mortar flows out of the sleeve. In addition, there is a problem that the work of binding the frame to the reinforcing bar with a wire occurs and becomes complicated.

  The present invention provides a packing and a joining structure that can easily obtain a sealing force for a reinforcing bar even if the outer diameter of the reinforcing bar to be inserted changes.

In the packing of the present invention, a rod-shaped member having a diameter smaller than that of the hollow is inserted in the hollow of the cylindrical member along an insertion direction parallel to the axial direction of the cylindrical member, and between the cylindrical member and the rod-shaped member in the radial direction. A packing for interposing the space and sealing the space, the cylindrical body positioned between the cylindrical member and the rod-shaped member in the radial direction, and the near side in the insertion direction in the axial direction of the cylindrical body A first flap protruding from the inner peripheral surface of the cylindrical body toward the radial center at the first end of the cylindrical body, and the first end of the cylindrical body in the axial direction of the cylindrical body. A second flap projecting from the inner peripheral surface of the second end located opposite to the center in the radial direction; and the first end and the second end in the axial direction of the cylindrical body The radial direction from the inner peripheral surface of the predetermined position between the part And a third flap projecting toward the center of,
The cylindrical body, the first flap, the second flap, and the third flap are integrally formed of the same elastic member, and the first flap, the second flap, and the third flap The inner diameter of each of the cylindrical members is smaller than the outer diameter of the rod-shaped member, and the inner peripheral surface of the first portion of the cylindrical body from the predetermined position to the first end portion has the first position from the predetermined position. A taper surface is formed in the radial direction so as to be separated from the axis of the cylindrical body as it goes to the end of the first flap, and the insertion direction at the tip of each of the first flap, the second flap, and the third flap An inclined surface that is inclined toward the back side in the insertion direction as it goes toward the center in the radial direction is formed on the surface on the near side.

  According to the above-described packing, the inner diameter of each flap is smaller than the outer diameter of the rod-shaped member. Therefore, if the rod-shaped member is inserted into the inner space in the radial direction of each flap, an additional process such as winding with a wire or the like as in the prior art Even if there is not, the front-end | tip of a flap closely_contact | adheres to the outer peripheral surface of a rod-shaped member. Since the taper surface is provided on the inner peripheral surface of the first portion of the packing, the rod-shaped member is easily inserted along the insertion direction. When the insertion of the rod-shaped member is completed, the inclined surface provided in each packing hits the outer peripheral surface of the rod-shaped member, so that the sealing force of the packing against the rod-shaped member is increased, and the fluid filled in the hollow of the cylindrical member is cylindrical. It does not flow out from the axial end of the member. Therefore, even if the outer diameter of the rod-shaped member into which the inner diameter of each flap is inserted changes, the sealing force for the rod-shaped member can be easily obtained.

  In the packing according to the present invention, the distal end portion of the second flap may bulge from the proximal end portion of the second flap.

  According to the above-described packing, the strength of the second flap is increased as compared with the case where the leading end of the second flap does not bulge out from the base end, and the sealing force of the second flap with respect to the rod-shaped member and the packing Increased durability.

  In the packing of the present invention, a smooth surface parallel to the axis of the cylindrical body is formed on the inner peripheral surface of the second portion from the predetermined position to the second end portion, and the inner diameter of the second portion Is the same as the minimum inner diameter of the first portion, and a recess extending along the axial direction of the cylindrical body from the end surface intersecting the axial direction of the cylindrical body at the innermost position in the insertion direction in the second portion. It may be formed.

  According to the above-described packing, since the concave portion is formed in the second portion, the weight is reduced, and when the rod-shaped member is inserted, the second portion is appropriately bent and easy to use.

  In the packing according to the present invention, an inner diameter of each of the first flap, the second flap, and the third flap may be smaller than a minimum outer diameter of the rod-shaped member that can be inserted.

  According to the above-described packing, when there are a plurality of fixed values of the outer diameter of the rod-shaped member inserted into the inner space, the inner diameter of each flap is smaller than the minimum value (minimum outer diameter) of the plurality of fixed values of the rod-shaped member. . As a result, even if the outer diameter of the rod-shaped member is changed within the range of the plurality of fixed values described above or the inner diameter of the cylindrical member, if the rod-shaped member is inserted into the inner space of the packing, the tip of the flap is the outer periphery of the rod-shaped member. Adhering to the surface, the sealing force of the packing against the rod-shaped member is obtained.

  In the packing according to the present invention, the cylindrical member may be a sleeve joint, and the rod-shaped member may be a reinforcing bar.

  If the above-described packing is disposed in the hollow of the sleeve joint and the reinforcing bar is inserted into the inner space of the packing, the tip of the flap is brought into close contact with the outer peripheral surface of the rod-shaped member, and the sealing force of the packing against the reinforcing bar is obtained. In this state, if a non-shrinking and high-strength mortar is filled between the inner wall surface of the sleeve joint and the reinforcing bars and between the reinforcing bars, the reinforcing bars are easily and satisfactorily joined by the sleeve joint.

  The joining structure of the present invention includes the above-described packing, a cylindrical member in which the packing is accommodated in a hollow space, and the first flap, the second flap, and the third flap in the radial direction of the packing. A rod-shaped member inserted in the inner space.

  According to the above-described joining structure, like the packing of the present invention, the sealing force of the packing against the rod-shaped member can be easily obtained even if the outer diameter of the rod-shaped member into which the inner diameter of each flap is inserted changes.

  The joining structure of the present invention may further include a pair of stoppers that protrude from two different positions in the circumferential direction of the inner peripheral surface of the cylindrical member toward the radial center of the cylindrical member.

  According to the above-described joining structure, the innermost position in the insertion direction of the rod-shaped member is surely regulated, and the movement of the fluid injected into the gap between the rod-shaped member and the cylindrical member is not hindered and smooth.

  According to this invention, even if the outer diameter of the reinforcing bar inserted in packing changes, the sealing force of the packing with respect to a reinforcing bar can be obtained easily.

It is the side view which fractured | ruptured a part of joining structure of this invention. It is a perspective view of the packing of this invention. It is sectional drawing which looked at the packing shown in FIG. 2 at the ZZ line. It is sectional drawing along the insertion direction for demonstrating the state which inserted the reinforcing bar in the packing shown in FIG.

  Hereinafter, preferred embodiments of the packing and the joining structure of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the packing 6 of this invention is used for the joining structure 1 of this invention, and is used when joining the rod-shaped member 22 to the cylindrical member 21 to a joint. In the present invention, the cylindrical member 21 is a sleeve (sleeve joint, cylindrical member) 11, and the bar-shaped member 22 is reinforcing bars (bar-shaped members) 2-1 and 2-2.

  The joint structure 1 is a reinforced concrete structure, and includes reinforcing bars 2-1 and 2-2, a sleeve 11, a packing 6, and a filler 50. Hereinafter, when the contents common to the reinforcing bars 2-1 and 2-2 are described, the reinforcing bars 2-1 and 2-2 are collectively referred to as a reinforcing bar 2.

  The reinforcing bar 2 is a material used for construction or the like, and is a rod-shaped member having a predetermined outer diameter and length according to the size of the building. Protrusions 8 are provided on the outer peripheral surface of the reinforcing bar 2 at intervals in the axial direction. The convex portion 8 is formed so as to draw a spiral around the axial direction. In the present invention, the outer diameter of the reinforcing bar 2 is a minimum outer diameter B (hereinafter referred to as an outer diameter B) of the reinforcing bar 2 where the convex portion 8 is not formed. When the contents common to the outer diameters B-1 and B-2 of the reinforcing bars 2-1 and 2-2 are described, the outer diameters B-1 and B-2 are collectively referred to as an outer diameter B.

  The reinforcing bars 2-1 and 2-2 have the same shape as each other. The outer diameters B-1 and B-2 may be the same as each other or different from each other. The outer diameter B includes a plurality of fixed values. The plurality of fixed values are, for example, nominal diameters D16, D19, D22, D25, D29, D32, D35, D38, and D41.

  The sleeve 11 is a cylindrical hollow member. The sleeve 11 is provided with an inlet 4 and an outlet 5 for communicating the internal space S and the external space in the radial direction (radial direction of the cylindrical member) R. Each of the inlet 4 and the outlet 5 is formed at a position moved from the end in the axial direction J of the sleeve 11 to the center side. Locked recesses 15 and 16 that are recessed outward in the radial direction R are formed on the inner peripheral surface 12 at the end in the axial direction J of the sleeve 11. The inner peripheral surface 12 between the recessed portions 15 and 16 to be locked in the axial direction J is smaller in diameter than the inner peripheral surface 12 of the portion on the center side of the sleeve 11 from the discharge port 5 in the axial direction J. In the axial direction J, the inner peripheral surface 12 at the end outside the locked recess 15 is further reduced in diameter than the inner peripheral surface 12 between the locked recesses 15 and 16 in the axial direction J.

  A plurality of ribs 7 are provided on the inner peripheral surface 12 of the sleeve 11 at the center side from the position where the injection port 4 and the discharge port 5 are formed in the axial direction J of the sleeve 11, spaced apart from each other in the axial direction J. Yes. The rib 7 projects into the hollow P from the inner peripheral surface 12 toward the center C in the radial direction R. In the axial direction J, the rib 7 located at the boundary between the end near the discharge port 5 of the sleeve 11 and the discharge port 5 is longer than the other ribs 7. The inner diameter of the rib 7 is at least larger than the outer diameter B, and is larger than the outer diameter of the reinforcing bar 2 where the convex portion 8 is formed.

  Two stoppers 3-1 and 3-2 are provided on the inner peripheral surface 12 near the center in the axial direction J of the sleeve 11. The stoppers 3-1 and 3-2 are provided at two positions facing each other in the circumferential direction of the inner peripheral surface 12. The paired stoppers 3-1 and 3-2 protrude toward the center in the radial direction R. In the radial direction R, the tips in the protruding direction of the pair of stoppers 3-1 and 3-2 are arranged with an appropriate size interval. The stoppers 3-1 and 3-2 are the reinforcing bars 2-1 in the insertion directions I-1 and 1-2 of the reinforcing bars 2-1 and 2-2 parallel to the axial direction J. , 2-2, the innermost insertion position is determined.

  The sleeve 11 is made of high-strength cast iron.

  The packing 6 is accommodated in the space S at the upper end in the axial direction J of the sleeve 11. A reinforcing bar 2-1 is inserted into the inner space P of the packing 6.

  The packing 6 is interposed in the space S between the sleeve 11 and the reinforcing bar 2-1 in the radial direction R, and seals the space S at the upper end portion of the sleeve 11. As shown in FIGS. 2 and 3, the packing 6 includes a cylindrical body 31, a flap (first flap) 41, a flap (second flap) 42, a flap (third flap) 43, and a locking projection 85. , 86.

  The cylinder 31, the flaps 51, 52, 53 and the locking projections 85, 86 are integrally formed of the same elastic member. Examples of the elastic member include synthetic rubber and natural rubber. Hereinafter, the dimensions and shapes in the description of each configuration of the packing 6 are dimensions and shapes in a state where the packing 6 is not elastically deformed (hereinafter sometimes referred to as a natural state) unless otherwise specified.

  The cylindrical body 31 is located between the sleeve 11 and the reinforcing bar 2 in the radial direction R in the joining structure 1 shown in FIG.

  As shown in FIGS. 2 and 3, the flap 41 has an inner circumferential surface 33 of the cylindrical body 31 at an end portion (first end portion) 51 on the near side in the insertion direction I-1 in the axial direction K of the cylindrical body 31. Projecting toward the center C in the radial direction (the radial direction of the packing) R. The flap 42 protrudes toward the center C in the radial direction R from the inner peripheral surface 33 of the end portion (second end portion) 52 positioned opposite to the end portion 51 in the axial direction K. The flap 43 protrudes from the inner peripheral surface 33 at a predetermined position 53 between the end portions 51 and 52 in the axial direction K toward the center C in the radial direction R. The predetermined position 53 is, for example, at the center of the cylindrical body 31 in the axial direction K. As shown in FIG. 2, the flaps 41, 42, and 43 are provided on the entire circumference of the inner peripheral surface 33 with the axial direction K as the center, and are formed in an annular shape when viewed along the axis 30.

  The inner diameter A of the flaps 41, 42, 43 is smaller than the outer diameter B-1. As described above, the outer diameter B-1 has a plurality of fixed values, and if the outer diameter B-1 of the reinforcing bar 2-1 used is only one fixed value among the plurality of fixed values, the inner diameter A is at least smaller than the one fixed value described above. When the outer diameter B-1 includes two or more fixed values among a plurality of fixed values, the inner diameter A is smaller than the smallest fixed value of the two or more fixed values. As a result, even if the standard value of the outer diameter B-1 is changed or the so-called step-down occurs, the flaps 51, 52, 53 are formed on the outer peripheral surface of the reinforcing bar 2-1 inserted into the inner space P of the packing 6. The tip portions 71, 72, 73 can be brought into close contact with each other.

  A tapered surface 35 is formed on the inner peripheral surface 33 of the first portion 61 of the cylindrical body 31 from the predetermined position 53 to the end portion 51. The tapered surface 35 is separated from the axis 30 of the cylindrical body 31 in the radial direction R as it advances from the predetermined position 53 to the end portion 51. By providing the inclined angle of the tapered surface 35 with respect to the axis 30, the end portion 51 on the near side in the insertion direction I- 1 of the packing 6 is opened outward in the radial direction R from the back side portion, and the reinforcing bar 2 −1 can be easily inserted into the inner space P.

  A smooth surface 36 parallel to the axis 30 is formed on the inner peripheral surface 33 of the second portion 62 from the predetermined position 53 to the end portion 52. The inner diameter of the second portion 62 is the same as the minimum inner diameter of the first portion 61, and is substantially equal to, for example, the outer diameter B-1, that is, the minimum fixed value of the reinforcing bar 2-1.

  The front surfaces 71, 72, 73 in the protruding direction from the inner peripheral surface 33 of the flaps 41, 42, 43 have inclined surfaces 75, 76, 77 on the surfaces 45, 46, 47 on the near side in the insertion direction I-1. Is formed. The inclined surfaces 75, 76, 77 are inclined toward the back side in the insertion direction I- 1 toward the center C in the radial direction R. The inclination angle of the inclined surfaces 75, 76, 77 with respect to a horizontal line (not shown) parallel to the radial direction R and the length in the radial direction R of the inclined surfaces 75, 76, 77 are the characteristics of the material of the packing 6 and the outer diameter. It is appropriately set in consideration of B-1 and the like.

  The distal end portion 73 of the flap 43 bulges from the proximal end portion 80 of the flap 43. The width of the base end portion 80, that is, the size of the base end portion 80 in the axial direction K is substantially constant in the radial direction R. The distal end portion 73 bulges from the end portion closest to the center C in the radial direction R of the base end portion 80 toward the center C and bulges away from the radial direction R in all directions with the radial direction R as the center. It is provided to do. On the other hand, the widths of the flaps 41 and 42 are substantially constant until they reach the inclined surfaces 75 and 76 from the inner peripheral surface 33 in the protruding direction from the inner peripheral surface 33, that is, in the radial direction R. As described above, the widths of the inclined surfaces 75 and 76 decrease toward the tips in the protruding direction of the flaps 41 and 42, that is, as the center C in the radial direction R is approached.

  As shown in FIG. 3, a recess 66 is formed in the end surface 38 that intersects the axis 30 (the axial direction of the cylinder) on the innermost side (backmost) in the insertion direction I-1 in the second portion 62. . The recess 66 extends along the axial direction K from the end surface 38 and reaches the vicinity of the predetermined position 53.

  The outer peripheral surface 34 of the packing 6 is formed in accordance with the shape of the inner peripheral surface 12 at the end portion outside the discharge port 5 in the axial direction J of the sleeve 11. That is, the outer peripheral surface 34 at a predetermined position 53 in the axial direction K of the packing 6 is provided with a locking convex portion 85 that protrudes outward in the radial direction R and fits into the locked concave portion 15 to be locked. Yes. On the outer peripheral surface 34 of the end portion 52 of the packing 6, there is provided a locking projection 86 that protrudes outward in the radial direction R and is fitted and locked in the locked recess 16. The outer peripheral surface 34 between the end portion 51 in the axial direction K of the packing 6 and the predetermined position 53 is smaller in diameter than the outer peripheral surface 34 between the end portion 52 in the axial direction K of the packing 6 and the predetermined position 53. ing.

  Next, with reference to FIG. 1 and FIG. 4, the construction method of the above-described joint structure 1 will be briefly described. First, the packing 6 is provided in the space S at the upper end of the sleeve 11. At that time, the locking projections 85 are fitted into the locked recesses 15 and locked together, and the locking projections 86 are fitted into the locked recesses 16 and locked together.

  A plurality of reinforcing bars 2-2 projecting upward are provided on the base upper surface L of the base used in the construction method of the joint structure 1. A frame portion that protrudes upward from the upper surface L of the base is provided on the outer peripheral edge of the base. Therefore, the lower end portions in the axial direction J of the plurality of sleeves 11 are inserted into the respective reinforcing bars 2-2. The lower end surface of the sleeve 11 is separated from the base upper surface L in the axial direction J and is positioned above the base upper surface L (see FIG. 1). In FIG. 1, the entire base and the frame are not shown, and only the base upper surface L is shown.

  Subsequently, the reinforcing bar 2-1 is inserted into the space S at the upper end of the sleeve 11 up to a predetermined length along each of the insertion directions I-1. FIG. 4 shows how the reinforcing bar 2-1 is inserted into the space S at the upper end of the sleeve 11 along the insertion direction I-1. When the reinforcing bar 2-1 is inserted into the space S along the insertion direction I-1, at least the tip portions 71, 72, and 73 of the flaps 41, 42, and 43 are curved toward the back side in the insertion direction I-1. Thus, the inclined surfaces 75, 76, 77 hit the outer peripheral surface of the reinforcing bar 2-1, and are in close contact with each other. As a result, the space S on the center side of the discharge port 5 in the axial direction J of the sleeve 11 is sealed by the flaps 41, 42, 43 of the packing 6, and is blocked from the space outside the sleeve 11.

  Next, mortar is pressurized and injected into the space S of the sleeve 11-0 from the injection port 4 of one sleeve 11 (hereinafter referred to as the sleeve 11-0). Accordingly, the mortar is filled in the space S of the sleeve 11-0, and once flows out from the lower end of the sleeve 11-0 to the base upper surface L, and moves on the base upper surface L. The mortar that has moved on the upper surface L of the base is the sleeve 11 other than the sleeve 11-0, that is, the sleeve 11 from which the mortar is not injected from the injection port 4 (hereinafter referred to as the sleeve 11-1). It flows into the space S. After the air in the space S between the injection port 4 and the discharge port 5 is discharged from the discharge port 5 in the axial direction J of all the sleeves 11, the sleeve 11-0 is discharged when the mortar is discharged from the discharge port 5. The pressure injection of mortar from the injection port 4 is stopped. The inlet 4 is closed with a cap 24, and the outlet 5 is closed with a cap 25. Through the above steps, the joining structure 1 shown in FIG. 1 is completed.

In the packing 6 of the present embodiment described above, the cylindrical body 31 and the flaps 41, 42, 43 are integrally formed by the same elastic member, and the inner diameter A of the flaps 41, 42, 43 is smaller than the outer diameter B-1. . A tapered surface 35 is formed on the inner peripheral surface 33 of the first portion 61 of the cylindrical body 31 from the predetermined position 53 to the end portion 51, and the insertion direction I at the distal end portions 71, 72, 73 of the flaps 41, 42, 43. Inclined surfaces 75, 76, 77 are formed on the front surfaces 45, 46, 47 of -1, I-2.
According to the above-described configuration, when the reinforcing bar 2-1 is inserted into the inner space P of the flaps 41, 42, 43, there is no additional process such as winding from the outside in the radial direction with a wire or the like as in the prior art, or the outer diameter. Even if no packing is separately made when B-1 becomes thin due to stepping or the like, the tip portions 71, 72, 73 of the flaps 41, 42, 43 are in close contact with the outer peripheral surface of the reinforcing bar 2. Since the taper surface 35 is provided in the inner peripheral surface 33 of the first portion 61 of the packing 6 and the diameter of the first portion 61 is increased in front of the insertion direction I-1, the reinforcing bar 2 is inserted in the insertion direction I-1. Can be easily inserted along. Further, in a state where the reinforcing bar 2 is inserted into the inner space P to a predetermined length, the inclined surfaces 75, 76, 77 contact the outer peripheral surface of the reinforcing bar 2 as shown in FIG. The force can be increased, and the mortar (fluid) filled in the space S can be prevented from flowing out from the end in the axial direction J of the sleeve 11. With such a configuration, even if the outer diameter of the reinforcing bar 2 into which the inner diameter A of the flaps 41, 42, 43 is inserted changes, the reinforcing bar 2 can be easily inserted into the inner space P, and the sealing force of the packing 6 against the reinforcing bar 2 can be increased. It can be obtained easily and reliably.

  Moreover, in the packing 6 of this embodiment, since the front-end | tip part 73 bulges from the base end part 80, the intensity | strength of the flap 43 is raised compared with the flaps 41 and 42 which are not bulged, and the flap 43 is prevented from returning. can do. Specifically, as shown in FIG. 4, when the reinforcing bar 2-1 is inserted into the inner space P, the flaps 41, 42, and 43 are bent and deformed, and in particular, a force such as shear stress is applied to the distal end portion 73. Join bigger than. The width in the radial direction R of the distal end portions 71 and 72 of the flaps 41 and 42 decreases without increasing beyond the width in the radial direction R of the proximal end portion as it approaches the center C in the radial direction R. On the other hand, the width in the radial direction R of the distal end portion 73 of the flap 43 once increases from the width in the radial direction R of the proximal end portion 80 and decreases after approaching the center C in the radial direction R. The bulging distal end portion 73 can receive the force applied as described above when the rebar 2 is inserted into the inner space P at the distal end portion larger than the proximal end portion. Therefore, the strength of the flap 43 can be increased compared with the flaps 41 and 42 without causing the flap 43 to be reversed, and the sealing force of the flap 43 against the reinforcing bar 2 and the durability of the packing 6 can be increased.

In the packing 6 of the present embodiment, the smooth surface 36 is formed on the inner peripheral surface 33 of the second portion 62, and the inner diameter of the second portion 62 is the same as the minimum inner diameter of the first portion 61. A recess 66 is formed in the end surface 38 of the second portion 62.
According to the above-described configuration, the weight of the packing 6 is reduced, and the portion from the smooth surface 36 to the inner wall surface 67 of the second portion 62 is appropriately bent when the reinforcing bar 2-1 is inserted into the inner space P. Thus, the packing 6 can be used in close contact with the outer peripheral surface of the reinforcing bar 2-1, and the sealing force of the packing 6 against the reinforcing bar 2-1 can be reliably obtained even if the outer diameter of the reinforcing bar 2-1 changes.

Further, in the packing 6 of the present embodiment, the inner diameter A of the flaps 41, 42, 43 is smaller than the outer diameter B-1 of a plurality of types of outer diameter reinforcing bars 2-1 inserted through the inner space P. For example, the inner diameter of the sleeve 11 is formed in accordance with the nominal diameter D41, and when the reinforcing bar 2-1 having the nominal diameter D35 dropped by two steps from the nominal diameter D41 is used, the outer diameter of the packing 6 is matched with the sleeve 11 having the nominal diameter D41. The inner diameter A of the flaps 41, 42, 43 is made smaller than D35.
According to the above-described configuration, when there are a plurality of fixed values of the outer diameter of the reinforcing bar 2-1 inserted into the inner space P, or when the reinforcing bar 2-1 having a diameter smaller than the diameter suitable for the design of the sleeve 11 is used. Even if the outer diameter of the reinforcing bar 2-1 changes within the range of a plurality of standard values, the distal end portions 71, 72, 73 are connected to the outer peripheral surface of the reinforcing bar 2-1, when the reinforcing bar 2-1 is inserted into the inner space P. Can be adhered to. Thereby, even if the outer diameter changes, the sealing force of the packing 6 against the reinforcing bar 2-1 can be obtained.

In the present embodiment, the cylindrical member 21 is the sleeve 11, and the rod-shaped member 22 is the reinforcing bar 2-1.
When the packing 6 is arranged in the space S of the sleeve 11 and the reinforcing bar 2-1 is inserted into the inner space P of the packing 6 to a predetermined position, the tip portions 71, 72, and 73 of the flaps 41, 42, and 43 are connected to the reinforcing bar 2- The sealing force of the packing 6 against the reinforcing bar 2 can be obtained. In this state, the reinforcing bar 2-1 can be easily and satisfactorily joined to the sleeve 11 by filling non-shrinking and high-strength mortar between the inner wall surface of the sleeve 11 and the reinforcing bar 2-1.

The joining structure 1 of this embodiment includes the above-described packing 6, a cylindrical member 21, a rod-like member 22, and a filler 50.
According to the above-described joining structure 1, the packing 6 is disposed in the space S of the cylindrical member 21, and the rod-shaped member 22 is inserted into the inner space P of the packing 6 to a predetermined position, thereby sealing the packing 6 against the rod-shaped member 22. A stopping force can be easily obtained. In this state, the filler 50 is injected under pressure from the inlet 4 between the inner wall surface of the cylindrical member 21 and the outer wall surface of the rod-shaped member 22 until the filler 50 is discharged from the outlet port 5 in a fluid state. The cylindrical member 21 can be joined to the rod-shaped member 22.

In the joining structure 1 of the present embodiment, two stoppers 3-1 and 3-2 are provided on the inner peripheral surface 12 of the sleeve 11.
According to the joint structure 1 described above, the innermost position when the reinforcing bars 2-1 and 2-2 are inserted into the space S of the sleeve 11 along the insertion directions I-1 and I-2 is reliably regulated, Moreover, compared with the conventional stopper formed so as to cross the inner peripheral surface 12 along the radial direction R, the movement of the mortar injected into the space S is not hindered, and the filling of the mortar is facilitated. Generation of air stagnation can be suppressed.

  As mentioned above, although embodiment of the packing of this invention was described, this invention is not limited to the above-mentioned embodiment. The present invention can be modified within the scope of the gist of the present invention described in the claims for utility model registration. Moreover, the above-mentioned aspect and modification can be combined suitably.

  In the above-described embodiment, the cylindrical member is a sleeve joint. However, in the present invention, the cylindrical member is not limited to the sleeve joint. For example, the cylindrical member may be a pipe joint having two commonly used inlets. The pipe joint may be an arbitrary joint having a plurality of receiving ports.

  In the above-described embodiment, the bar-shaped member is a reinforcing bar, but in the present invention, the bar-shaped member is not limited to the reinforcing bar, and may be an arbitrary bar-shaped member or a part of the bar-shaped portion of the arbitrary member. Further, the shape of the reinforcing bar is not limited to the shape of the reinforcing bar 2 described above. The reinforcing bar 2 does not need to have the convex portion 8 and may have a smooth outer peripheral surface along the axial direction J.

  Moreover, in the above-mentioned embodiment, the packing 6 is provided with one flap 43, but may be provided with a plurality of flaps 43 at intervals between the flaps 41 and 42 in the axial direction K.

  In the above-described embodiment, the packing 6 is provided only at the upper end portion of the upper end portion and the lower end portion of the sleeve 11. However, as described above, the reinforcing bars 2-2 are attached to the sleeves 11 by the method of filling the spaces S of all the sleeves 11 with mortar by pressure injection into the injection ports 4 of the sleeves 11-0 using the base and the frame. When the mortar is directly injected into the space S from the injection port 4 of each sleeve 11 without using the base and the frame portion or the like instead of joining, the packing 6 is also inserted into the space S at the lower end of the sleeve 11. Is preferably arranged.

DESCRIPTION OF SYMBOLS 1 ... Joining structure 2, 2-1, 2-2 ... Reinforcing bar (bar-shaped member)
6 ... packing 11 ... sleeve (sleeve joint, cylindrical member)
DESCRIPTION OF SYMBOLS 21 ... Cylindrical member 22 ... Bar-shaped member 31 ... Cylindrical body 33 ... Inner peripheral surface 35 ... Tapered surface 36 ... Smooth surface 41 ... Flap (1st flap)
42 ... Flap (second flap)
43 ... Flap (3rd flap)
45, 46, 47 ... surfaces 71, 72, 73 ... tip portions 75, 76, 77 ... inclined surface A ... inner diameter B-1 ... outer diameter R ... radial direction J ... axial direction (axial direction of cylindrical member)
K: Axial direction (axial direction of cylinder)
L ... Upper surface of base

Claims (7)

A rod-shaped member having a smaller diameter than the hollow is inserted in the hollow of the cylindrical member along an insertion direction parallel to the axial direction of the cylindrical member, and is interposed in a space between the cylindrical member and the rod-shaped member in the radial direction. Packing for sealing the space,
A cylindrical body positioned between the cylindrical member and the rod-shaped member in the radial direction;
A first flap protruding from an inner peripheral surface of the cylindrical body toward a center in the radial direction at a first end on the near side in the insertion direction in the axial direction of the cylindrical body;
A second flap projecting from the inner peripheral surface of the second end located opposite to the first end of the cylinder in the axial direction of the cylinder toward the radial center;
A third flap protruding from the inner peripheral surface at a predetermined position between the first end and the second end in the axial direction of the cylindrical body toward the radial center;
With
The cylindrical body, the first flap, the second flap, and the third flap are integrally formed of the same elastic member,
The inner diameter of each of the first flap, the second flap, and the third flap is smaller than the outer diameter of the rod-shaped member,
On the inner peripheral surface of the first portion of the cylindrical body from the predetermined position to the first end portion, the cylindrical body in the radial direction as it proceeds from the predetermined position to the first end portion. A tapered surface spaced from the axis is formed;
At the front end of each of the first flap, the second flap, and the third flap, the surface on the near side in the insertion direction is directed toward the back side in the insertion direction toward the center in the radial direction. An inclined surface is formed,
Packing. The distal end of the second flap bulges from the proximal end of the second flap;
The packing according to claim 1. A smooth surface parallel to the axis of the cylindrical body is formed on the inner peripheral surface of the second portion from the predetermined position to the second end,
The inner diameter of the second portion is the same as the minimum inner diameter of the first portion;
In the second part, a recess extending along the axial direction of the cylindrical body from the end surface intersecting the axial direction of the cylindrical body at the innermost position in the insertion direction is formed.
The packing according to claim 1 or 2. The inner diameter of each of the first flap, the second flap, and the third flap is smaller than the minimum outer diameter of the insertable rod-shaped member,
The packing according to any one of claims 1 to 3. The cylindrical member is a sleeve joint;
The rod-shaped member is a reinforcing bar,
The packing according to any one of claims 1 to 4. The packing according to any one of claims 1 to 4,
A cylindrical member in which the packing is accommodated in a hollow;
A rod-like member inserted into the inner space of the first flap, the second flap, and the third flap in the radial direction of the packing;
With
Junction structure. A pair of stoppers protruding from two different positions in the circumferential direction of the inner circumferential surface of the cylindrical member toward the radial center of the cylindrical member;
The joining structure according to claim 6.

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