JP6877287B2 - Grip cap and fixing member - Google Patents

Description

The present invention relates to a grip cap and a fixing member, more specifically, in a prestressed concrete method, holding an end portion of a tension material penetrating a concrete member, at least a part of a grip fixed to the concrete member, and protruding from the grip. It relates to a tension material to be used, a grip cap for covering the tension material, and a fixing member including the grip cap.

A prestressed concrete (PC) method is known in which the durability of a concrete member is improved by applying compression stress (prestress) to the concrete member in advance. In the PC method, a grip is used as a member that holds the end of the tension material that penetrates the concrete member and is fixed to the concrete. Then, for the purpose of preventing rust on the grip and the tension material protruding from the grip, a grip cap covering at least a part of the grip and the tension material protruding from the grip may be adopted (see, for example, Patent Document 1). ).

Japanese Unexamined Patent Publication No. 2-16239

In order to achieve the purpose such as rust prevention, the grip cap needs to be properly attached to the grip. Therefore, one of the purposes is to provide a grip cap that can easily secure proper mounting and a fixing member including the grip cap.

The grip cap according to the present invention holds the end of the tension material penetrating the concrete member in the prestressed concrete method, and covers at least a part of the grip fixed to the concrete member and the tension material protruding from the grip. It is a grip cap for. The grip cap comprises a tubular portion that surrounds at least a portion of the grip and an end wall portion that closes one end of the tubular portion. The tubular portion is formed with a pin through hole for penetrating the tubular portion in the thickness direction and for inserting a fixing pin for fixing the grip cap to the grip.

According to the above-mentioned grip cap, it is possible to provide a grip cap that is easy to secure proper wearing.

It is a schematic perspective view which shows the structure of the grip cap in Embodiment 1. FIG. It is a schematic front view which shows the structure of the grip cap in Embodiment 1. FIG. It is a schematic left side view which shows the structure of the grip cap in Embodiment 1. FIG. It is a schematic right side view which shows the structure of the grip cap in Embodiment 1. FIG. It is a schematic plan view (top view) which shows the structure of the grip cap in Embodiment 1. FIG. It is a schematic perspective view which shows the structure of the locking member in Embodiment 1. FIG. It is the schematic sectional drawing which shows the structure of the grip cap in Embodiment 1. FIG. It is schematic cross-sectional view which shows the use state of the grip cap in Embodiment 1. FIG. It is a schematic cross-sectional view which shows the cross section along the line segment IX-IX of FIG. It is schematic cross-sectional view which shows the use state of the grip cap in Embodiment 1. FIG. It is the schematic perspective view which shows the structure of the grip cap in Embodiment 2. FIG. It is a schematic front view which shows the structure of the grip cap in Embodiment 2. It is a schematic left side view which shows the structure of the grip cap in Embodiment 2. FIG. It is a schematic right side view which shows the structure of the grip cap in Embodiment 2. FIG. It is a schematic plan view (top view) which shows the structure of the grip cap in Embodiment 2. It is the schematic sectional drawing which shows the structure of the grip cap in Embodiment 2. It is a schematic perspective view which shows the structure of the grip cap in Embodiment 3. FIG. It is a schematic front view which shows the structure of the grip cap in Embodiment 3. FIG. It is a schematic plan view (top view) which shows the structure of the grip cap in Embodiment 3. It is the schematic sectional drawing which shows the structure of the grip cap in Embodiment 3. FIG. It is schematic cross-sectional view which shows the use state of the grip cap in Embodiment 3. FIG.

[Explanation of Embodiments of the Invention]
First, embodiments of the present invention will be listed and described. The grip cap of the present application holds the end of the tension material penetrating the concrete member in the prestressed concrete method, and covers at least a part of the grip fixed to the concrete member and the tension material protruding from the grip. It is a cap. The grip cap comprises a tubular portion that surrounds at least a portion of the grip and an end wall portion that closes one end of the tubular portion. The tubular portion is formed with a pin through hole for penetrating the tubular portion in the thickness direction and for inserting a fixing pin for fixing the grip cap to the grip.

In the grip cap of the present application, a through hole for a pin is formed in the tubular portion so that the tubular portion penetrates in the thickness direction and a fixing pin for fixing the grip cap to the grip is inserted. .. As a result, the operator who attaches the grip cap to the grip confirms that the grip cap has been properly attached by covering the grip with the grip cap and then fixing the grip cap to the grip with a fixing pin. be able to. Further, by fixing the grip cap to the grip with a fixing pin, it is possible to prevent the grip cap from moving in the axial direction of the tubular portion with respect to the grip after the grip cap is attached. As a result, according to the grip cap of the present application, it is possible to provide a grip cap that can be easily fitted.

In the grip cap, a cap recess, which is a recess, may be formed on the outer peripheral surface of the tubular portion. After mounting the grip cap, additional concrete may be placed so that the grip cap is buried. Since the cap recess is formed on the outer peripheral surface of the tubular portion, it is possible to prevent the grip cap from moving in the axial direction of the tubular portion with respect to the grip after the concrete is poured.

In the grip cap, the cap recess may be a groove extending in the circumferential direction of the tubular portion. By doing so, the movement of the grip cap after the concrete is placed is further suppressed.

In the grip cap, a cap protruding portion, which is a convex portion, may be formed on the outer peripheral surface of the tubular portion. By doing so, it is possible to prevent the grip cap from moving in the axial direction of the tubular portion with respect to the grip after the concrete in which the grip cap is buried is placed.

In the grip cap, the cap protrusion may be a flange portion extending in the circumferential direction of the tubular portion. By doing so, it is more surely suppressed that the grip cap moves in the axial direction of the tubular portion with respect to the grip after the concrete is poured.

In the grip cap, the end wall portion may be formed with a housing protrusion for accommodating a tension material protruding from the grip. By doing so, it becomes easy to cover the tension material protruding from the grip with the grip cap.

In the grip cap, a plurality of through holes for pins may be formed. By doing so, it becomes easier to ensure proper mounting.

In the grip cap, the tubular portion may cover a part of the grip in the axial direction of the tubular portion. Even when such a structure is adopted, according to the grip cap, proper mounting can be easily ensured.

In the grip cap, the end wall portion may be formed with a through hole penetrating the end wall portion in the thickness direction. By doing so, the through hole can be used as a filler supply path for filling between the grip cap and the grip, an air discharge path for filling the filler, and the like.

The fixing member of the present application is a fixing member for fixing the end portion of the tension material penetrating the concrete member to the concrete member in the prestressed concrete method. This fixing member holds the end of the tension material and covers the grip fixed to the concrete member, at least a part of the grip, the tension material protruding from the grip, and the grip cap with respect to the grip. It is provided with a fixing pin for fixing the concrete. The grip cap is the grip cap of the present application. The grip is arranged at a position corresponding to the through hole for the pin, and is formed with an insertion hole for the pin into which the fixing pin can enter. The fixing pin penetrates the pin through hole and reaches the pin insertion hole.

In the fixing member of the present application, the grip cap of the present application, which can easily ensure proper mounting, is adopted, and the grip cap is fixed to the grip by a fixing pin. Therefore, according to the fixing member of the present application, it is possible to provide a highly reliable fixing member.

[Details of Embodiments of the present invention]
Next, an embodiment of the grip cap and the fixing member according to the present invention will be described below with reference to the drawings. In the drawings below, the same or corresponding parts are given the same reference numbers, and the explanations are not repeated.

(Embodiment 1)
First, the grip cap according to the first embodiment will be described with reference to FIGS. 1 to 7. FIG. 1 is a schematic perspective view showing the structure of the grip cap according to the present embodiment. FIG. 2 is a schematic front view showing the structure of the grip cap according to the present embodiment. FIG. 3 is a schematic left side view showing the structure of the grip cap according to the present embodiment. FIG. 4 is a schematic right side view showing the structure of the grip cap according to the present embodiment. FIG. 5 is a schematic plan view (top view) showing the structure of the grip cap according to the present embodiment. FIG. 6 is a schematic perspective view showing the structure of the locking member according to the present embodiment. FIG. 7 is a schematic cross-sectional view showing the structure of the grip cap according to the present embodiment.

With reference to FIGS. 1 to 7, the grip cap 1 holds the end of the tension material penetrating the concrete member in the prestressed concrete construction method, and at least a part of the grip fixed to the concrete member and projecting from the grip. It is a grip cap for covering the tension material. The grip cap 1 includes a tubular portion 10 that surrounds at least a part of the grip, and an end wall portion 20 that closes one end of the tubular portion 10.

The tubular portion 10 has a hollow cylindrical shape. A groove 13 is formed on the outer peripheral surface of the tubular portion 10 as a cap recess recessed on the inner peripheral side in the radial direction. The groove 13 is formed so as to extend over the entire circumference of the tubular portion 10 in the circumferential direction. That is, the groove 13 is formed in an annular shape. A plurality of grooves 13 are formed. On the outer peripheral surface of the tubular portion 10, a projecting portion 12 as a first cap projecting portion projecting to the outer peripheral side in the radial direction is formed. The protruding portion 12 is formed so as to extend over the entire circumference of the tubular portion 10 in the circumferential direction. That is, the protruding portion 12 is formed in an annular shape. A plurality of protrusions 12 are formed.

The protrusions 12 and the grooves 13 are alternately formed in the axial direction of the tubular portion 10. That is, in the region where the protrusion 12 and the groove 13 on the outer peripheral surface of the tubular portion 10 are formed, the region where the outer diameter of the tubular portion 10 is large and the region where the outer diameter is small alternate in the axial direction of the tubular portion 10. Have been placed. The region of the inner peripheral surface corresponding to the region of the tubular portion 10 in which the protruding portion 12 is arranged on the outer peripheral surface is an annular groove which is a recess recessed on the outer peripheral side in the radial direction. On the other hand, the region of the inner peripheral surface corresponding to the region where the groove 13 is arranged on the outer peripheral surface of the tubular portion 10 is an annular protruding portion which is a convex portion protruding in the radial inner peripheral side.

The end wall portion 20 includes a base portion 21, a first protruding portion 29, and a housing protruding portion 24 as a second protruding portion. The first protruding portion 29 projects from the base portion 21 to the side opposite to the tubular portion 10. The accommodating projecting portion 24 projects from the first projecting portion 29 to the side opposite to the tubular portion 10.

The base portion 21 has a disk-like shape having a through hole in the central portion. The base portion 21 is connected to one end of the tubular portion 10 at the outer peripheral portion. The first protruding portion 29 includes a first cylindrical portion 27 and a first disk portion 28. The first cylindrical portion 27 has a hollow cylindrical shape with both ends open. The first cylindrical portion 27 is connected to the inner peripheral portion of the base portion 21 at one end. The first disk portion 28 has a disk-like shape having a through hole in the central portion. The first disk portion 28 is connected to an end portion of the first cylindrical portion 27 opposite to the base portion 21 on the outer peripheral portion.

The accommodating protrusion 24 includes a second cylindrical portion 22 and a second disk portion 23. The second cylindrical portion 22 has a hollow cylindrical shape with both ends open. The second cylindrical portion 22 is connected to the inner peripheral portion of the first disk portion 28 at one end. The second disk portion 23 has a disk-like shape. The second disk portion 23 is connected to an end portion of the second cylindrical portion 22 opposite to the first protruding portion 29 on the outer peripheral portion. The second disk portion 23 closes the end portion of the second cylindrical portion 22 opposite to the first protruding portion 29. The accommodating protrusion 24 accommodates the tension material protruding from the grip, as will be described later. The diameter of the accommodating protrusion 24 is smaller than the diameter of the tubular portion 10.

A groove 26 recessed on the inner peripheral side in the radial direction is formed on the outer peripheral surface of the second cylindrical portion 22. The groove 26 is formed so as to extend over the entire circumference of the second cylindrical portion 22 in the circumferential direction. That is, the groove 26 is formed in an annular shape. A plurality of grooves 26 are formed. A protruding portion 25 projecting to the outer peripheral side in the radial direction is formed on the outer peripheral surface of the second cylindrical portion 22. The protruding portion 25 is formed so as to extend over the entire circumference of the second cylindrical portion 22 in the circumferential direction. That is, the protruding portion 25 is formed in an annular shape. A plurality of protrusions 25 are formed.

The protrusions 25 and the grooves 26 are alternately formed in the axial direction of the second cylindrical portion 22. That is, in the region where the protrusion 25 and the groove 26 on the outer peripheral surface of the second cylindrical portion 22 are formed, the region where the outer diameter of the second cylindrical portion 22 is large and the region where the outer diameter is small are in the axial direction of the second cylindrical portion 22. Are arranged alternately in. In the second cylindrical portion 22, the region of the inner peripheral surface corresponding to the region where the protruding portion 25 is arranged on the outer peripheral surface is an annular groove which is a recess recessed on the outer peripheral side in the radial direction. On the other hand, in the second cylindrical portion 22, the region of the inner peripheral surface corresponding to the region where the groove 26 is arranged on the outer peripheral surface is an annular protruding portion which is a convex portion protruding in the radial inner peripheral side. ..

Then, the tubular portion 10 is formed with a pin through hole 11 for penetrating the tubular portion 10 in the thickness direction and for inserting the fixing pin 18A for fixing the grip cap 1 to the grip. There is. With reference to FIG. 7, in the present embodiment, a plurality (two) of through holes 11 for pins are formed. Specifically, the pin through holes 11 are formed so as to face each other with the central axis of the tubular portion 10 interposed therebetween. With reference to FIG. 6, the fixing pin 18A is included in the fixing member 19. The fixing member 19 has a semicircular (arc-shaped) shape having a curvature along the outer peripheral surface in a cross section perpendicular to the central axis of the tubular portion 10. Fixing pins 18A are formed in the end regions 18 which are both ends in the circumferential direction of the fixing member 19. The fixing pin 18A is a protruding portion that protrudes from each end region 18 toward the center side in the radial direction. The fixing pin 18A is positioned so as to correspond to the pin through hole 11 because the fixing member 19 has a semicircular shape having a curvature along the outer peripheral surface of the tubular portion 10. That is, by arranging the fixing member 19 along the outer peripheral surface of the tubular portion 10, each fixing pin 18A can be inserted into each pin through hole 11. The pin through hole 11 is formed on the side opposite to the end wall portion 20, that is, on the opening 30 side when viewed from the region where the protrusion 12 and the groove 13 of the tubular portion 10 are formed.

Next, with reference to FIGS. 8 to 10, the configuration of the fixing member including the grip cap 1 and the usage mode of the fixing member including the grip cap 1 will be described. The fixing member including the grip cap 1 is used in the PC method as follows.

In the PC construction method in the present embodiment with reference to FIGS. 8 and 9, first, a step of preparing a concrete member 40 in which a sheath 81 is embedded is carried out. The concrete member 40 includes, for example, a fine aggregate such as sand, a coarse aggregate such as gravel, and cement. The sheath 81 is, for example, a pipe material having a hollow cylindrical shape. The sheath 81 is made of a resin such as polyethylene. The sheath 81 is arranged so as to penetrate the concrete member 40. As a result, a cylindrical space surrounded by the sheath 81 penetrates the concrete member 40. A disk-shaped recess is formed on the outer wall surface of the concrete member 40. The end of the sheath 81 is exposed in this recess.

Next, the stranded wire 86 as a tensioning material is inserted into the sheath 81, and the step of installing the plate 50 in the recess is carried out. The stranded wire 86 is arranged so that there is a space between the sheath 81 and the stranded wire 86. The stranded wire 86 has a structure in which steel wires such as a plurality of piano wires are twisted together. The plate 50 has a disk-like shape in which a cylindrical through hole that penetrates the central portion in the axial direction is formed. The plate 50 is made of a metal such as steel. The plate 50 is fitted into the recess of the concrete member 40 so that the end portion of the sheath 81 penetrates the through hole of the plate 50. The outer peripheral surface 53 of the plate 50 contacts the peripheral wall 41 surrounding the recess of the concrete member 40 over the entire circumference. Further, the plate 50 is arranged so that one end surface 52 of the plate 50 comes into contact with the concrete member 40 and the other end surface 51 is flush with the surface of the concrete member 40. As a result, the stranded wire 86 penetrates the concrete member 40. The end of the stranded wire 86 projects from the concrete member 40.

Next, the step of installing the grip is carried out. The grip includes a first member 60 and a second member 70. The first member 60 and the second member 70 are made of a metal such as steel. The first member 60 has a cylindrical shape. The outer peripheral surface 61 of the first member 60 has a cylindrical surface shape. A through hole is formed in the first member 60 so as to include a central axis. This through hole is surrounded by an inner peripheral surface 62 having a regular conical surface shape. As a result, this through hole has a truncated cone shape. On the outer peripheral surface 61 of the first member 60, a pin insertion hole 63 is formed at a position corresponding to the pin through hole 11 and into which the fixing pin 18A can enter. In the present embodiment, a plurality (two) of pin insertion holes 63 are formed. As shown in FIG. 9, the pin insertion holes 63 are formed on the same circumference in a cross section perpendicular to the central axis and at positions facing each other with the central axis in between. The pin insertion hole 63 is a bottomed hole. In the step of installing the grip, first, the first member 60 is installed so that the stranded wire 86 protruding from the concrete member 40 penetrates the through hole. The first member 60 is installed so that one end face is in contact with the end face 51 of the plate 50. The first member 60 is installed so that the diameter of the through hole surrounded by the inner peripheral surface 62 in the cross section perpendicular to the central axis becomes smaller as it approaches the plate 50.

Next, the second member 70 is installed. The second member 70 has a shape corresponding to the space between the inner peripheral surface 62 of the first member 60 and the stranded wire 86. Specifically, the second member 70 has a plurality of truncated cone-shaped members having a cylindrical through hole so as to include the central axis, which are cut along a plane including the central axis in the circumferential direction (for example,). It has a shape divided into two). That is, the second member 70 is composed of a plurality of wedge-shaped members corresponding to the space between the inner peripheral surface 62 of the first member 60 and the stranded wire 86. In the installation of the second member 70, the tip end side of the second member 70 made of a plurality of wedge-shaped members is inserted into the space between the inner peripheral surface 62 of the first member 60 and the stranded wire 86.

Next, a step of tensioning the stranded wire 86 is performed. In this step, in a state where the end of the stranded wire 86 on the side opposite to the side protruding from the first member 60 is fixed to the concrete member 40, the end of the stranded wire 86 on the side protruding from the first member 60 is pressed. Pull with a tensioning device (not shown). After that, when the tension to the stranded wire by the tensioning device is released, the second member 70 is pulled toward the concrete member 40 side, and the second member 70 stops at a position where the second member 70 is pulled in to some extent. As a result, the concrete member 40 is in a state in which compressive stress (prestress) is applied along the extending direction of the stranded wire 86.

Next, the step of attaching the grip cap 1 is carried out. In this step, the grip cap 1 is attached so as to cover the first member 60 and the second member 70 constituting the grip and the end portion of the stranded wire 86 protruding from the grip. Specifically, the grip cap 1 is mounted so that the inner peripheral surface of the tubular portion 10 of the grip cap 1 of the present embodiment and the outer peripheral surface of the first member 60 come into contact with each other. The grip cap 1 is mounted so as to cover the first member 60 and the second member 70 constituting the grip from the opening 30 side of the grip cap 1. The end portion of the stranded wire 86 is accommodated in the accommodating protrusion 24 of the grip cap 1. Further, the pin insertion hole 63 formed in the outer peripheral surface 61 of the first member 60 and the pin through hole 11 formed in the tubular portion 10 of the grip cap 1 overlap in a plan view. Then, the fixing member 19 is installed so that the fixing pin 18A penetrates the pin through hole 11 and reaches the pin insertion hole 63. As a result, the attachment of the grip cap 1 is completed. The first member 60, the second member 70, the grip cap 1, and the fixing pin 18A (fixing member 19) have the end of the stranded wire 86 as a tensioning material penetrating the concrete member 40 in the PC method with respect to the concrete member 40. It constitutes a fixing member to be fixed.

Next, the step of injecting the filler is carried out. In this step, resin is formed in the space between the inner peripheral surface of the sheath 81 and the outer peripheral surface of the stranded wire 86 via a filler injection path (not shown) communicating the outside of the concrete member 40 and the inside of the sheath 81. Fillers such as are injected.

Next, the step of placing concrete is carried out. In this step, with reference to FIGS. 8 and 10, the concrete 90 is used to bury the first member 60, the second member 70, the grip cap 1 and the fixing pin 18A (fixing member 19) constituting the fixing member. It will be cast. By the above procedure, the PC construction method of the present embodiment is completed. The filler injected into the space between the inner peripheral surface of the sheath 81 and the outer peripheral surface of the stranded wire 86 is cured in a period of, for example, several hours to several years.

In the fixing member of the present embodiment, a pin insertion hole 63 is formed on the outer peripheral surface of the first member 60 constituting the grip. On the other hand, a through hole 11 for a pin is formed in the tubular portion 10 of the grip cap 1. When the grip cap 1 is attached, the grip cap 1 is pushed so that the pin through hole 11 of the grip cap 1 and the pin insertion hole 63 of the first member 60 overlap each other in a plan view. Then, the grip cap 1 is fixed to the first member 60 by installing the fixing member 19 so that the fixing pin 18A penetrates the pin through hole 11 and reaches the pin insertion hole 63. ..

Therefore, the operator can confirm that the grip cap 1 can be properly attached by installing the fixing member 19. Further, since the grip cap 1 is fixed to the first member 60 by the fixing member 19, the grip cap 1 is prevented from moving in the axial direction of the tubular portion 10 with respect to the grip after the grip cap 1 is attached. Will be done. As a result, the grip cap 1 is a grip cap that can be easily attached. Further, the fixing member of the present embodiment including the first member 60, the second member 70, the grip cap 1 and the fixing pin 18A (fixing member 19) is a highly reliable fixing member.

Further, a groove 13 and a protruding portion 12 are formed on the outer peripheral surface of the tubular portion 10 of the grip cap 1 of the present embodiment. The formation of the groove 13 and the protrusion 12 is not essential in the grip cap of the present application, but due to the formation of these, the grip cap 1 with respect to the first member 60 constituting the grip after the concrete 90 is cast. Axial movement is suppressed. As a result, with reference to FIG. 7, a large distortion occurs in the vicinity of the region 91 on the side opposite to the plate 50 in the axial direction of the grip cap 1, or a crack occurs in the vicinity of the region 91 due to the distortion. The phenomenon can be suppressed.

Further, the end wall portion 20 of the grip cap 1 is formed with a housing protrusion 24 having a diameter smaller than that of the tubular portion 10. The formation of the accommodating protrusion 24 is not essential in the grip cap of the present application, but the formation of the accommodating protrusion 24 reduces the space formed between the grip cap 1 and the grip and the stranded wire 86. This makes it easy to fill the space with a filler, for example.

(Embodiment 2)
Next, a second embodiment, which is another embodiment of the grip cap and the fixing member of the present application, will be described with reference to FIGS. 11 to 16. With reference to FIGS. 11 to 16 and FIGS. 1 to 10, the grip cap 1, the first member 60, the second member 70, and the fixing pin 18A (fixing member 19) constituting the fixing member in the second embodiment are Basically, it has the same structure as that of the first embodiment and has the same effect. However, the grip cap 1 of the second embodiment is different from the case of the first embodiment in that the following additional structure is adopted.

With reference to FIGS. 11 to 16, a flange 14 as a second cap protrusion is formed on the outer peripheral surface of the tubular portion 10 of the grip cap 1 according to the second embodiment. The flange 14 extends over the entire circumference in the circumferential direction of the tubular portion 10. The flange 14 has a disk-like shape having a through hole in the central portion. The flange 14 is connected to the outer peripheral surface of the tubular portion 10 at the inner peripheral portion. The flange 14 is formed so as to project in the radial direction from the outer peripheral surface of the tubular portion 10. The flange 14 is arranged on the end wall portion 20 side when viewed from the region where the groove 13 and the protruding portion 12 are formed on the outer peripheral surface of the tubular portion 10. Further, a rib 15 for connecting one main surface of the flange and the outer peripheral surface of the tubular portion 10 is formed on the outer peripheral surface of the tubular portion 10. A plurality of ribs 15 are formed at equal intervals with each other in the circumferential direction of the tubular portion 10.

Since the flange 14 is formed in the grip cap 1 of the second embodiment, the grip cap 1 further moves in the axial direction with respect to the first member 60 constituting the grip after the concrete 90 is cast. It is a suppressed grip cap.

Further, the end wall portion 20 of the grip cap 1 of the second embodiment is formed with a cylindrical protruding portion 16 having a hollow cylindrical shape with both ends open. One end of the cylindrical protrusion 16 is connected to the base 21 of the end wall 20. A through hole 17 is formed at the other end of the cylindrical protrusion 16. As a result, the space formed between the grip cap 1 and the grip and the stranded wire 86 communicates with the outside through the space surrounded by the cylindrical projecting portion 16. That is, the end wall portion 20 is formed with a through hole that penetrates the end wall portion 20 in the thickness direction. Therefore, for example, if the grip cap 1 is attached to the grip with a filler such as resin injected into the inside of the grip cap 1 in advance, the internal air and excess filler will flow to the outside through the space surrounded by the cylindrical protrusion 16. Is discharged to. In this way, the space surrounded by the cylindrical protrusion 16 can be used as a discharge path for air and filler. Further, by forming another through hole in the end wall portion 20, the space surrounded by the cylindrical projecting portion 16 may be used as a filler supply path. By doing so, after the grip cap 1 is attached, a filler such as resin can be introduced into the space formed between the grip cap 1 and the grip and the stranded wire 86.

(Embodiment 3)
Next, a third embodiment, which is another embodiment of the grip cap and the fixing member of the present application, will be described with reference to FIGS. 17 to 21. With reference to FIGS. 17 to 21 and FIGS. 1 to 10, the grip cap 1, the first member 60, the second member 70, and the fixing pin 18A (fixing member 19) constituting the fixing member in the third embodiment are Basically, it has the same structure as that of the first embodiment and has the same effect. However, the fixing member of the third embodiment is different from the case of the first embodiment in the covering structure of the first member 60 by the grip cap 1.

With reference to FIGS. 17 to 21, the axial length of the tubular portion 10 of the grip cap 1 in the third embodiment is smaller than that in the first embodiment. Specifically, the axial length of the region where the protrusion 12 and the groove 13 are formed on the outer peripheral surface of the tubular portion 10 is smaller than that of the first embodiment. As a result, the distance from the end wall portion 20 to the pin through hole 11 is smaller than that in the case of the first embodiment.

On the other hand, with reference to FIG. 21, in the first member 60 in the third embodiment, the formation position of the pin insertion hole 63 is changed corresponding to the formation position of the pin through hole 11. Specifically, the position of the pin insertion hole 63 of the third embodiment is changed to the side where the diameter of the inner peripheral surface 62 is larger in the axial direction than in the case of the first embodiment. As a result, as shown in FIG. 21, when the grip cap 1 is attached, the tubular portion 10 covers a part of the grip (first member 60) in the axial direction of the tubular portion 10. From another point of view, when the grip cap 1 is attached, a part of the outer peripheral surface 61 of the first member 60 is exposed from the grip cap 1. Even with such a structure, the area where rust prevention or the like is particularly required is protected by the grip cap 1.

In the above embodiment, the case where two through holes for pins are formed has been described, but the number of through holes for pins may be one or three or more. Further, in the above embodiment, the case where a plurality of pin through holes are formed on the same circumference has been described, but the plurality of pin through holes are arranged at different positions in the axial direction of the tubular portion. May be good.

It should be understood that the embodiments disclosed here are exemplary in all respects and are not restrictive in any way. The scope of the present invention is defined by the scope of claims, not the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

The grip cap and the fixing member of the present application may be particularly advantageously applied to the grip cap and the fixing member including the grip cap, which are required to easily ensure proper mounting.

1 Grip cap 10 Cylindrical part 11 Through hole for pin 12 Protruding part 13 Groove 14 Flange 15 Rib 16 Cylindrical protruding part 17 Through hole 18 End area 18A Fixing pin 19 Fixing member 20 End wall part 21 Base part 22 Second cylindrical part 23 2nd disk part 24 Containment protrusion 25 Projection part 26 Groove 27 1st cylindrical part 28 1st disk part 29 1st protrusion 30 Opening 40 Concrete member 41 Peripheral wall 50 Plate 51, 52 End surface 53 Outer surface 60 First member 61 Outer surface 62 Inner peripheral surface 63 Insertion hole for pin 70 Second member 81 Sheath 86 Strand wire 90 Concrete 91 Area

Claims (10)

A grip cap for holding the end of the tension material penetrating the concrete member in the prestressed concrete method and covering at least a part of the grip fixed to the concrete member and the tension material protruding from the grip. hand,
A tubular portion that surrounds at least a part of the grip,
An end wall portion that closes one end of the tubular portion is provided.
The tubular portion is formed with a pin through hole for penetrating the tubular portion in the thickness direction and for inserting a fixing pin for fixing the grip cap to the grip. cap. The grip cap according to claim 1, wherein a cap recess, which is a recess, is formed on the outer peripheral surface of the tubular portion. The grip cap according to claim 2, wherein the cap recess is a groove extending in the circumferential direction of the tubular portion. The grip cap according to any one of claims 1 to 3, wherein a cap protruding portion, which is a convex portion, is formed on the outer peripheral surface of the tubular portion. The grip cap according to claim 4, wherein the cap protruding portion is a flange portion extending in the circumferential direction of the tubular portion. The grip cap according to any one of claims 1 to 5, wherein an accommodating projecting portion for accommodating the tension material projecting from the grip is formed on the end wall portion. The grip cap according to any one of claims 1 to 6, wherein a plurality of through holes for pins are formed. The grip cap according to any one of claims 1 to 7, wherein the tubular portion covers a part of the grip in the axial direction of the tubular portion. The grip cap according to any one of claims 1 to 8, wherein a through hole is formed in the end wall portion so as to penetrate the end wall portion in the thickness direction. A fixing member for fixing the end of a tension material penetrating a concrete member to the concrete member in the prestressed concrete method.
A grip that holds the end of the tension material and is fixed to the concrete member,
A grip cap that covers at least a part of the grip and the tension material protruding from the grip.
A fixing pin for fixing the grip cap to the grip is provided.
The grip cap is the grip cap according to any one of claims 1 to 9.
The grip is arranged at a position corresponding to the through hole for the pin, and is formed with an insertion hole for the pin into which the fixing pin can enter.
The fixing pin is a fixing member that penetrates the pin through hole and reaches the pin insertion hole.

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