JP5241027B2 - Grout filling bracket - Google Patents

Description

  The present invention is an improved grout material for improving the anticorrosion treatment technology for the head of the lock bolt by improving the grout material to the outer peripheral portion below the bearing plate of the lock bolt head in a simple and accurate manner. Related to brackets.

  19 to 21 show examples of conventional construction related to the head of the lock bolt. FIG. 19 illustrates a state in which the lock bolt 102 is inserted into the hole 101 formed on the slope, and the grout material 103 is injected and solidified between the lock bolt 102 and the inner surface of the hole 101. It is. As shown in the figure, in this state, the gap 104 is formed above the grout material 103. Therefore, as shown in FIG. 20, curing is widely performed in which the gap 104 is filled with a hardened mortar 105 to expect a rust prevention effect on the head of the lock bolt below the bearing plate. However, the void 106 often remains in the rear portion of the mortar 105, and there is a troublesome technical problem that the void 106 becomes a major factor for reducing the rust prevention effect. Further, as shown in FIG. 21, when the bearing plate 107 is installed and the tightening nut 108 is screwed onto the lock bolt 102 exposed upward, the bearing plate 107 and the surface of the mortar 105 are In some cases, cracks 109 may enter the mortar 105 or the bearing plate 107 due to the uneven contact state or the remaining gap 106. Note that curing the surface of the mortar 105 to ensure a uniform contact state with the lower surface of the bearing plate 107 is extremely effective in reducing the crack 109. became.

  Therefore, a head member made of a stainless steel rod is screwed to the head side of an anchor material such as a general lock bolt made of a non-rust-proof steel rod, and a part of the head member is a bearing plate. A technique has been developed in which a rust prevention effect is imparted to the head portion of the anchor material by projecting upwardly and fixing with a tightening nut (Patent Document 1). However, in the case of this prior art, the material of the head member is limited, and not only an expensive material made of a stainless steel rod is required, but also the gap below the bearing plate cannot be eliminated. For this reason, the problem of a decrease in the rust prevention effect with respect to a lock bolt made of a non-rust-proof steel rod connected to the lower portion of the head member due to the voids has not been solved.

Japanese Patent No. 3998180

  In the present invention, in view of the above-described conventional technical situation, the grout material can be filled evenly and uniformly into the lower part of the bearing plate, and the lock can be obtained by accurately eliminating the remaining voids. An object of the present invention is to provide an easy-to-use grout filling metal fitting that improves the rust prevention effect on the head of the bolt.

  In order to solve the above-mentioned problems, a grout filling metal fitting according to the present invention has a female screw that can be screwed to the head side of the lock bolt, a male screw that can be screwed to a tightening nut, and an internal The grouting material has a pouring path, and the grouting material is filled into a gap formed in the outer peripheral portion on the head side of the lock bolt through a discharge port communicating with the pouring path. . A female screw that can be screwed to the head side of the lock bolt is formed through the grout filling metal fitting, and a communication path is formed in the middle of the female screw to communicate with the discharge port. The female screw may also be used as a grout material injection path.

According to the grout filling metal fitting according to the present invention, the following effects can be obtained.
(1) Since the grout material is filled in the gap formed in the outer peripheral portion of the head side of the lock bolt through the injection path formed inside the grout filling metal fitting protruding from the bearing plate, the grout is renewed. The grout material can be filled without forming a dedicated injection path for filling the material, and the grout filling metal fitting protruding from the bearing plate can be tightened with a tightening nut. Is greatly improved.
(2) Since the grout material can be filled directly from the inside of the gap formed in the outer peripheral portion on the lower side of the bearing plate of the lock bolt head through the injection path formed inside the grout filling metal fitting, It is possible to accurately fill the grout material evenly to every corner of the gap, and the gap remaining in the outer peripheral portion on the lower side of the bearing plate of the lock bolt head can be surely eliminated.
(3) Therefore, the entire head side of the lock bolt below the bearing plate and the grout filling fitting attached to the head side of the lock bolt are accurately wrapped by the filled grout material, and contact with air Is reliably cut off, so that an extremely effective rust prevention effect can be obtained.
(4) In addition, the grout material can be easily and accurately filled in the gap below the bearing plate, and the grout material can be easily adhered to the entire lower surface of the bearing plate. It is effective for simplifying the pressure plate installation and the grout material filling operation, and can also accurately resist the entire surface of the bearing plate against the tightening force of the tightening nut, so that the conventional cracking problem can be solved.

It is the front view which showed the state before mounting | wearing of the grout filling metal fitting based on the Example of this invention. It is the one side sectional view showing the wearing state of the metal fitting for grout filling. It is the front view which showed the metal fitting for grout filling. It is the bottom view which showed the metal fitting for grout filling. It is the longitudinal cross-sectional view which showed the metal fitting for grout filling. It is work explanatory drawing which showed the construction procedure in the case of applying the grout filling metal fitting which concerns on the Example of this invention. It is work explanatory drawing which showed the construction procedure. It is operation | work explanatory drawing which showed the construction procedure in the one-side cross section. It is operation | work explanatory drawing which showed the construction procedure in the one-side cross section. It is operation | work explanatory drawing which showed the construction procedure in the one-side cross section. It is the operation | work explanatory drawing which showed the construction procedure in the other application scene in the one-side cross section. It is operation | work explanatory drawing which showed the construction procedure in the one-side cross section. It is operation | work explanatory drawing which showed the construction procedure in the one-side cross section. It is operation | work explanatory drawing which showed the other clamping method with a clamping nut in the one-side cross section. It is operation | work explanatory drawing which showed the tightening method in the one-side cross section. It is operation | work explanatory drawing which showed the tightening method in the one-side cross section. It is operation | work explanatory drawing which showed the tightening method in the one-side cross section. It is the one side sectional view showing other examples. It is work explanatory drawing which showed the conventional construction procedure. It is work explanatory drawing which showed the conventional construction procedure. It is work explanatory drawing which showed the conventional construction procedure.

  The grout filling metal fitting according to the present invention is not restricted by a specific configuration on the lock bolt side, and can be widely applied to various types of lock bolts. Moreover, there is no special restriction | limiting also regarding the material of the metal fitting for the grout, and it is not restricted to a stainless steel bar like the said prior art. The female screw formed on the head side of the lock bolt of the grout filling metal fitting may be formed so as to penetrate the grout filling metal fitting and also serve as a grout material injection path, or it may be grout filled with a bottom. It may be formed in the middle of the metal fitting, and a grout material injection path may be separately formed on the opposite side. In addition, the number and location of the outlets communicating with the injection path can be freely selected according to the ease of filling the grout material. It is desirable that the male screw screwed into the tightening nut formed on the grout filling metal has a sufficient length for adjusting the extra length. You may make it form in the axial direction full length of the outer peripheral surface of the metal fitting for grout filling.

  1 to 5 show a grout filling metal fitting according to an embodiment of the present invention. FIG. 1 is a front view showing a state before mounting a grout filling metal fitting, and FIG. 2 is a one-side sectional view showing a mounting state of the grout filling metal fitting. As shown in the figure, in the case of the grout filling metal fitting 1 according to the present embodiment, a female screw 2 penetrating the inside is formed, and this female screw 2 is a male screw formed on the outer peripheral surface of the lock bolt 3. 4 so that it can be connected to the head side of the lock bolt 3. Since the female screw 2 is formed so as to penetrate the grout filling metal fitting 1, it is also used as a grout material injection path in this embodiment. Incidentally, a form in which the female screw 2 is formed partway through the grout filling metal fitting 1 and a dedicated grout material injection path is formed on the opposite side is also possible.

  3 is a front view showing the grout filling metal fitting 1, FIG. 4 is a bottom view thereof, and FIG. 5 is a longitudinal sectional view thereof. As shown in the figure, in the case of the grout filling metal fitting 1 of this embodiment, a male screw 5 that can be screwed into a tightening nut is formed on the upper half of the outer peripheral surface of the ground side, A plurality of ribs 6 are formed in the lower half, and a plurality of outlets 7 for grout material are formed on the circumference between the male screw 5 and the rib 6. Further, as shown in the longitudinal sectional view of FIG. 5, the internal space of the female screw 2 is communicated with the discharge port 7 via the communication path 8, and the internal space of these female screw 2, the communication path 8, the discharge port 7, a grout filling path is formed. If the adhesion with the grout material can be sufficiently secured, the rib 6 may not be provided, and the male screw 5 may be formed on the entire outer peripheral surface of the grout filling fitting 1 in place of the rib 6. It is.

  Next, according to FIGS. 6-10, the construction procedure in the case of applying the said grout filling metal fitting 1 which concerns on the Example of this invention is demonstrated. As shown in FIG. 6, when the lock bolt 3 is installed inside the drilling hole 10 formed in the ground 9 having a slope, first, the head of the male screw 4 formed on the outer peripheral surface of the lock bolt 3. The female screw 2 of the grout filling metal fitting 1 is screwed into the side end, and the length of the protruding portion protruding from the ground 9 of the grout filling metal fitting 1 is set to the thickness of the bearing plate and the installation of the tightening nut. Adjust while taking into account the necessary extra length.

  Next, as shown in FIG. 7, a grout material 11 such as cement milk is injected into the gap between the hole 10 formed in the ground 9 and the grout filling metal fitting 1 by an appropriate method. As a result, as shown in the drawing, a part of the grout filling metal fitting 1 is buried in the grout material 11, and a part of the ribs 6 formed in the lower half of the grout filling metal fitting 1 is also buried in the grout material 11. Will be. Therefore, rotation of the grout filling metal fitting 1 is prevented by the solidification of the grout material 11. Incidentally, the injection time of the grout material 11 can be changed depending on the construction form.

  Further, as shown in FIG. 8, the bearing plate 12 is installed on the ground 9 so as to close the upper portion of the drilling hole 10, and protrudes upward through the insertion hole formed in the center portion of the bearing plate 12. A tightening operation is performed by screwing the tightening nut 13 into the head side end of the grout filling metal fitting 1. Thereafter, as shown in FIG. 9, the internal space of the female screw 2 formed inside the grout filling metal fitting 1 is also used as a grout material injection path, and the bearing plate is connected via the communication passage 8 and the discharge port 7. The grouting material 14 is filled in the gap portion of the outer peripheral portion on the head side of the lock bolt 3 formed below the grouting material 11 previously injected below 12. Thus, in the case of the grout filling metal fitting 1 according to the present embodiment, by appropriately selecting the installation position and the number of installation of the discharge port 7, the head bolt side outer peripheral portion of the lock bolt 3 is formed in the hole 10. Since the grout material 14 can be poured directly into the formed gap and smooth filling is possible, it is possible to fill the grout material 14 easily and accurately evenly to every corner of the gap. . As a result, the head side of the lock bolt 3 located below the bearing plate 12 and the grout filling fitting 1 are reliably surrounded by the grout materials 11 and 14 and the contact with air is cut off, so that an accurate rust prevention effect is achieved. Can be secured easily. FIG. 10 shows a state after the grout material 14 is filled. Incidentally, the pressure bearing plate 12 is not limited to a flat plate as shown, but can be applied to various forms.

  As described above, when the grout filling metal fitting 1 according to the embodiment of the present invention is applied, the grout material 14 is simply connected by screwing the grout filling metal fitting 1 to the head side of the lock bolt 3. Since the filling flow path to be injected is provided at the same time and a new installation work for the filling flow path can be omitted, the workability of the filling work of the grout material 14 is greatly improved. Moreover, since the grout material 14 can be injected more smoothly from the inside of the gap formed in the outer periphery of the head side of the lock bolt 3 through the injection path of the grout material formed inside the grout filling metal fitting 1, It is possible to easily and accurately fill the grout material 14 evenly to every corner of the gap, and as a result, an accurate rust prevention effect on the head side of the lock bolt 3 and the grout filling metal fitting 1 can be obtained. Therefore, it is not necessary to limit the material of the grout filling metal fitting 1 to the stainless steel bar as in the prior art.

  FIG. 11 to FIG. 13 are work explanatory views showing the construction procedure in other application scenes in a cross section on one side. As shown in the figure, in this application scene, when the grout filling metal fitting 1 is applied to the case where the upper portion of the drilling hole 10 formed in the ground 9 collapses to form a recess 15 and the gap becomes larger. The construction procedure is not different from the construction procedure described above, and the construction procedure is applied as it is. As described above, the grout filling metal fitting according to the present invention can easily and accurately fill the grout material in correspondence with various types of voids to reliably eliminate the voids.

  In the above-described embodiment, as shown in FIG. 8, when performing the tightening operation with the tightening nut 13, a part of the grout filling metal fitting 1 is buried in the grout material 11 and rotation is prevented. The grout filling metal fitting 1 is prevented from being rotated by the tightening force of the tightening nut 13, but the grout filling metal fitting 1 is located outside the grout material 11, for example. Depending on the form, there may be a problem with the rotation of the grout filling metal fitting 1. FIG. 14 to FIG. 17 are operation explanatory views showing other tightening methods for preventing the rotation of the grout filling metal fitting 1 in such a case in a cross section on one side.

  Thus, the lock bolt 3 is installed inside the drilling hole 10 formed in the ground 9, and the grout filling metal fitting 1 is attached to the head side of the lock bolt 3. 12 is installed, and when the adjustment of the protruding length of the grout filling metal fitting 1 protruding upward from the bearing plate 12 is completed, a temporary tightening operation using the tightening nut 13 is performed. As a tightening method for preventing the rotation of the tightening nut 13 and the grout filling metal fitting 1 at that time, the following method is possible. First, as shown in FIG. 14, a torque introducing jig 16 made of a short member having the same configuration as that of the lock bolt 3 is screwed into the female screw 2 of the grout filling metal fitting 1 and tightened. Thereby, the lock bolt 3, the grout filling metal fitting 1 and the torque introduction jig 16 are integrated, and a state in which the relative rotation of the grout filling metal fitting 1 with respect to the lock bolt 3 is prevented is obtained. Therefore, as shown in FIG. 15, the grout filling metal fitting 1 is screwed into the male screw 5 of the grout filling metal fitting 1 from above the bearing plate 12 and tightened as shown in FIG. Therefore, the tightening nut 13 can be easily and accurately tightened. Thereafter, as shown in FIG. 17, the tightening operation is completed by removing the torque introducing jig 16 from the female screw 2 of the grout filling metal fitting 1.

  FIG. 18 is a half sectional view showing another embodiment. In this embodiment, a concave portion is formed on the lower surface of the bearing plate 12 and an appropriate packing 17 is inserted. The packing 17 prevents the grout material from flowing out between the ground 9 and the bearing plate 12. It is configured. As a result, the head side of the lock bolt 3 below the bearing plate 12 and the outer peripheral portion of the grout filling metal 1 through the grout material injection path formed of the female screw 2 and the like formed inside the grout filling metal 1. When the grouting material 14 is filled in the gap portion formed in the outer space, the grouting material 14 is effectively prevented from flowing out to the outside, and the grouting material 14 is more accurately filled to every corner of the gap portion. Can do.

  1: Grouting metal fitting, 2: Female screw, 3: Lock bolt, 4, 5: Male screw, 6: Rib, 7: Discharge port, 8: Communication path, 9: Ground, 10: Drilling hole, 11: Grout Material: 12: bearing plate, 13: tightening nut, 14: grout material, 15: recess, 16: torque introduction jig, 17: packing

Claims (2)

  The lock bolt has a female screw that can be screwed to the head side, a male screw that can be screwed to the tightening nut, and an injection path for grout material inside, and a drain communicating with the injection path. A grout filling metal fitting configured to fill a gap formed in the outer periphery of the lock bolt with a grout material through an outlet.   A female screw that can be screwed to the head side of the lock bolt is formed by penetrating the grout filling metal fitting, and a communication path is formed in the middle of the female screw to communicate with the discharge port, 2. The grout filling metal fitting according to claim 1, wherein the screw is also used as a grout material injection path.

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